/* ===== CSS变量定义 ===== */
:root {
    /* 主题色彩 */
    --primary-color: #992024;
    --primary-dark: #7a1a1d;
    --primary-light: #b83237;
    --secondary-color: #f5f5f5;
    --accent-color: #gold;
    --text-dark: #333333;
    --text-light: #666666;
    --text-white: #ffffff;
    --background-dark: #1a1a1a;
    --background-light: #fafafa;
    
    /* 间距系统 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* 字体系统 */
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.5rem;
    --font-size-2xl: 2rem;
    --font-size-3xl: 2.5rem;
    --font-size-4xl: 3rem;
    
    /* 阴影系统 */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-base: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --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);
    
    /* 动画时间 */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* 边框半径 */
    --border-radius-sm: 0.25rem;
    --border-radius-base: 0.5rem;
    --border-radius-lg: 1rem;
    --border-radius-full: 9999px;
}

/* ===== 基础重置和通用样式 ===== */
* {
    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', sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background: var(--background-light);
    overflow-x: hidden;
}

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

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

button {
    border: none;
    outline: none;
    cursor: pointer;
    font-family: inherit;
    transition: all var(--transition-base);
}

/* ===== 容器和布局 ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ===== 进度指示器 ===== */
.progress-indicator {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: rgba(255, 255, 255, 0.1);
    z-index: 9999;
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--primary-light));
    width: 0%;
    transition: width 0.1s ease;
}

/* ===== Canvas背景 ===== */
#particles-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -2;
    pointer-events: none;
}

#abstract-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    pointer-events: none;
    opacity: 0.3;
}

/* ===== 导航栏 ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(26, 26, 26, 0.95);
    backdrop-filter: blur(20px);
    z-index: 1000;
    transition: all var(--transition-base);
}

.navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-sm) var(--spacing-md);
    max-width: 1200px;
    margin: 0 auto;
}

.nav-brand .logo {
    height: 40px;
    width: auto;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
}

.nav-link {
    color: var(--text-white);
    font-weight: 500;
    position: relative;
    transition: color var(--transition-base);
}

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

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

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

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

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

/* ===== 主要内容 ===== */
.main-content {
    position: relative;
    z-index: 1;
}

/* ===== Hero Section ===== */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    text-align: center;
    position: relative;
    background: linear-gradient(135deg, rgba(26, 26, 26, 0.9) 0%, rgba(153, 32, 36, 0.1) 100%);
    color: var(--text-white);
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
    max-width: 1200px;
    width: 100%;
    padding: 0 var(--spacing-md);
}

.hero-text {
    text-align: left;
}

.hero-title {
    font-size: var(--font-size-4xl);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

.title-line {
    display: block;
    opacity: 0;
    transform: translateY(50px);
    animation: fadeInUp 1s ease forwards;
}

.title-line:nth-child(2) {
    animation-delay: 0.3s;
}

.highlight {
    color: var(--primary-color);
    position: relative;
    display: inline-block;
}

.highlight::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--primary-color);
    animation: slideIn 1s ease 0.8s forwards;
    transform: scaleX(0);
    transform-origin: left;
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    color: var(--primary-light);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    opacity: 0;
    animation: fadeInUp 1s ease 0.6s forwards;
}

.hero-description {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.9);
    opacity: 0;
    animation: fadeInUp 1s ease 0.9s forwards;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    opacity: 0;
    animation: fadeInUp 1s ease 1.2s forwards;
}

.btn-primary, .btn-secondary {
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--font-size-base);
    font-weight: 600;
    border-radius: var(--border-radius-full);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.btn-secondary:hover {
    background: var(--text-white);
    color: var(--text-dark);
}

.hero-visual {
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-svg {
    width: 100%;
    height: 300px;
    opacity: 0;
    animation: fadeIn 1s ease 1.5s forwards;
}

.hero-scroll-indicator {
    position: absolute;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    color: rgba(255, 255, 255, 0.7);
    animation: bounce 2s infinite;
}

.scroll-icon {
    width: 2px;
    height: 30px;
    background: var(--primary-color);
    margin: 0 auto var(--spacing-sm);
    position: relative;
}

.scroll-icon::after {
    content: '';
    position: absolute;
    top: 0;
    left: -3px;
    width: 8px;
    height: 8px;
    border: 2px solid var(--primary-color);
    border-radius: 50%;
    animation: scrollDot 2s infinite;
}

/* ===== Section通用样式 ===== */
section {
    padding: var(--spacing-xl) 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: var(--spacing-md);
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: var(--primary-color);
}

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

/* ===== About Section ===== */
.about-section {
    background: var(--text-white);
}

.about-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.about-content h3 {
    font-size: var(--font-size-xl);
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
    font-weight: 600;
}

.about-content p {
    font-size: var(--font-size-base);
    line-height: 1.8;
    margin-bottom: var(--spacing-lg);
    color: var(--text-light);
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

.stat-item {
    text-align: center;
    padding: var(--spacing-lg);
    background: var(--background-light);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-base);
}

.stat-item:hover {
    transform: translateY(-5px);
}

.stat-number {
    font-size: var(--font-size-3xl);
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--text-light);
    font-weight: 500;
}

/* ===== Advantages Section ===== */
.advantages-section {
    background: var(--background-light);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.advantage-card {
    background: var(--text-white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-base);
    position: relative;
    transition: all var(--transition-base);
    overflow: hidden;
}

.advantage-card::before {
    content: attr(data-number);
    position: absolute;
    top: -20px;
    right: -20px;
    font-size: 4rem;
    font-weight: 800;
    color: rgba(153, 32, 36, 0.1);
    z-index: 0;
}

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

.card-icon {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--spacing-md);
    position: relative;
    z-index: 1;
}

.card-title {
    font-size: var(--font-size-xl);
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
    font-weight: 600;
    position: relative;
    z-index: 1;
}

.card-description {
    color: var(--text-light);
    line-height: 1.7;
    position: relative;
    z-index: 1;
}

/* ===== Teachers Section ===== */
.teachers-section {
    background: var(--text-white);
}

.teachers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.teacher-card {
    position: relative;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-base);
    transition: transform var(--transition-base);
}

.teacher-card:hover {
    transform: scale(1.05);
}

.teacher-image {
    position: relative;
    height: 300px;
    overflow: hidden;
}

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

.teacher-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(26, 26, 26, 0.9));
    color: var(--text-white);
    padding: var(--spacing-lg);
    transform: translateY(100%);
    transition: transform var(--transition-base);
}

.teacher-card:hover .teacher-overlay {
    transform: translateY(0);
}

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

.teacher-info h3 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-sm);
    color: var(--text-white);
}

.teacher-info p {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--spacing-xs);
}

/* ===== Achievements Section ===== */
.achievements-section {
    background: var(--background-dark);
    color: var(--text-white);
}

.achievements-section .section-title,
.achievements-section .section-subtitle {
    color: var(--text-white);
}

.achievement-highlights {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.highlight-item {
    text-align: center;
    padding: var(--spacing-lg);
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius-lg);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: transform var(--transition-base);
}

.highlight-item:hover {
    transform: translateY(-10px);
}

.highlight-number {
    font-size: var(--font-size-4xl);
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.highlight-text {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-md);
    color: var(--text-white);
}

.highlight-desc {
    font-size: var(--font-size-base);
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.6;
}

.slogan-section {
    text-align: center;
    padding: var(--spacing-xl) 0;
}

.slogan-text {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
    position: relative;
    display: inline-block;
}

.slogan-desc {
    font-size: var(--font-size-lg);
    color: rgba(255, 255, 255, 0.8);
}

/* ===== Contact Section ===== */
.contact-section {
    background: var(--text-white);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: start;
}

.contact-info {
    space-y: var(--spacing-lg);
}

.info-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.info-icon {
    font-size: var(--font-size-2xl);
    color: var(--primary-color);
    flex-shrink: 0;
}

.info-content h4 {
    font-size: var(--font-size-lg);
    color: var(--text-dark);
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
}

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

.contact-form {
    background: var(--background-light);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-base);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-sm);
    border: 2px solid rgba(153, 32, 36, 0.1);
    border-radius: var(--border-radius-base);
    font-size: var(--font-size-base);
    background: var(--text-white);
    transition: border-color var(--transition-base);
}

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

.full-width {
    width: 100%;
}

/* ===== Footer ===== */
.footer {
    background: var(--background-dark);
    color: var(--text-white);
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
}

.footer-brand .footer-logo {
    height: 50px;
    margin-bottom: var(--spacing-md);
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.8);
    font-style: italic;
}

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

.link-group h4 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
    font-weight: 600;
}

.link-group a {
    display: block;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--spacing-sm);
    transition: color var(--transition-base);
}

.link-group a:hover {
    color: var(--primary-light);
}

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

.footer-copyright p {
    color: rgba(255, 255, 255, 0.6);
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-xs);
}

.footer-copyright a {
    color: var(--primary-light);
    transition: color var(--transition-base);
}

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

/* ===== 动画定义 ===== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

@keyframes slideIn {
    from { transform: scaleX(0); }
    to { transform: scaleX(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);
    }
}

@keyframes scrollDot {
    0% {
        top: 0;
        opacity: 1;
    }
    100% {
        top: 20px;
        opacity: 0;
    }
}

/* ===== 响应式设计 ===== */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-text {
        text-align: center;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-links {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    :root {
        --font-size-4xl: 2.5rem;
        --font-size-3xl: 2rem;
        --font-size-2xl: 1.5rem;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: rgba(26, 26, 26, 0.95);
        backdrop-filter: blur(20px);
        flex-direction: column;
        justify-content: flex-start;
        padding-top: var(--spacing-xl);
        transition: left var(--transition-base);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .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);
    }
    
    .advantages-grid {
        grid-template-columns: 1fr;
    }
    
    .teachers-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    }
    
    .achievement-highlights {
        grid-template-columns: 1fr;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-buttons button {
        width: 200px;
    }
    
    .about-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-sm);
    }
    
    .footer-links {
        grid-template-columns: 1fr;
        text-align: left;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    section {
        padding: var(--spacing-lg) 0;
    }
    
    .hero-content {
        gap: var(--spacing-md);
    }
    
    .about-stats {
        grid-template-columns: 1fr;
    }
    
    .stat-item {
        padding: var(--spacing-md);
    }
    
    .advantage-card {
        padding: var(--spacing-md);
    }
    
    .contact-form {
        padding: var(--spacing-md);
    }
    
    .teacher-image {
        height: 250px;
    }
}

/* ===== 动画增强 ===== */
.header.scrolled {
    background: rgba(26, 26, 26, 0.98) !important;
    box-shadow: var(--shadow-lg);
}

.header.hidden {
    transform: translateY(-100%);
}

.header {
    transition: all var(--transition-base);
}

/* ===== 通知系统样式 ===== */
.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    background: var(--text-white);
    border-radius: var(--border-radius-base);
    box-shadow: var(--shadow-xl);
    z-index: 10000;
    max-width: 400px;
    transform: translateX(100%);
    opacity: 0;
    transition: all var(--transition-base);
}

.notification.show {
    transform: translateX(0);
    opacity: 1;
}

.notification.hide {
    transform: translateX(100%);
    opacity: 0;
}

.notification-success {
    border-left: 4px solid #4CAF50;
}

.notification-error {
    border-left: 4px solid #f44336;
}

.notification-info {
    border-left: 4px solid var(--primary-color);
}

.notification-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md);
}

.notification-close {
    background: none;
    border: none;
    font-size: var(--font-size-xl);
    color: var(--text-light);
    cursor: pointer;
    padding: 0;
    margin-left: var(--spacing-sm);
}

/* ===== 表单验证样式 ===== */
.form-group.valid input,
.form-group.valid select,
.form-group.valid textarea {
    border-color: #4CAF50;
}

.form-group.invalid input,
.form-group.invalid select,
.form-group.invalid textarea {
    border-color: #f44336;
}

.error-message {
    color: #f44336;
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-xs);
}

/* ===== 移动端优化 ===== */
.menu-open {
    overflow: hidden;
}

.touch-device button {
    -webkit-tap-highlight-color: transparent;
}

.touch-device a {
    -webkit-tap-highlight-color: transparent;
}

/* ===== 低性能模式 ===== */
.low-performance *,
.reduced-motion * {
    animation-duration: 0.01ms !important;
    animation-delay: 0.01ms !important;
    transition-duration: 0.2s !important;
    transition-delay: 0.01ms !important;
}

.low-performance #particles-canvas,
.low-performance #abstract-canvas,
.reduced-motion #particles-canvas,
.reduced-motion #abstract-canvas {
    display: none !important;
}

/* ===== 性能优化模式 ===== */
.performance-optimized .advantage-card:hover,
.performance-optimized .teacher-card:hover,
.performance-optimized .stat-item:hover {
    transform: none !important;
}

/* ===== SVG动画样式 ===== */
.section-divider {
    overflow: visible;
    filter: drop-shadow(0 2px 4px rgba(153, 32, 36, 0.1));
}

.card-icon-svg {
    filter: drop-shadow(0 2px 4px rgba(153, 32, 36, 0.2));
}

.stat-progress {
    margin-top: var(--spacing-sm);
    filter: drop-shadow(0 1px 2px rgba(153, 32, 36, 0.3));
}

.decoration-path {
    filter: blur(0.5px);
    animation: float 6s ease-in-out infinite;
}

.signature-path {
    filter: drop-shadow(0 2px 4px rgba(153, 32, 36, 0.4));
}

/* ===== 额外动画定义 ===== */
@keyframes float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-10px) rotate(2deg); }
}

@keyframes shimmer {
    0% { background-position: -1000px 0; }
    100% { background-position: 1000px 0; }
}

@keyframes glow {
    0%, 100% { box-shadow: 0 0 20px rgba(153, 32, 36, 0.3); }
    50% { box-shadow: 0 0 40px rgba(153, 32, 36, 0.6); }
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.7; transform: scale(1.05); }
}

/* ===== 高级效果 ===== */
.hero-title {
    background: linear-gradient(
        45deg,
        var(--text-white) 30%,
        var(--primary-color) 50%,
        var(--text-white) 70%
    );
    background-size: 200% auto;
    background-clip: text;
    -webkit-background-clip: text;
    color: transparent;
    animation: shimmer 3s linear infinite;
}

.slogan-text {
    animation: glow 4s ease-in-out infinite;
}

.growth-dot {
    animation: pulse 2s ease-in-out infinite;
    animation-delay: calc(var(--index, 0) * 0.5s);
}

/* ===== 工具类 ===== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.hidden { display: none; }
.visible { display: block; }

.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

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

/* ===== 视差效果元素 ===== */
[data-parallax] {
    transition: transform 0.1s ease-out;
}

/* ===== 载入状态 ===== */
body:not(.loaded) {
    overflow: hidden;
}

body:not(.loaded) .main-content {
    opacity: 0;
}

.loaded .main-content {
    opacity: 1;
    transition: opacity 1s ease;
}