/* 基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', 'SF Pro Display', 'Helvetica Neue', Arial, sans-serif;
}
a {
  text-decoration: none;
}
body {
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
    color: #1e293b;
    line-height: 1.6;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
    position: sticky;
    top: 0;
    z-index: 1000;
    min-height: 80px;
    border-bottom: 1px solid #e2e8f0;
}

.logo-container {
    display: flex;
    align-items: center;
    height: 100%;
}

.logo {
    height: 48px;
    transition: all 0.3s ease;
    filter: brightness(1.1);
}

.logo:hover {
    transform: scale(1.05);
    filter: brightness(1.2);
}

.nav-menu {
    position: relative;
    display: flex;
    align-items: center;
    height: 100%;
}

.dropbtn {
    background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
    color: white;
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
    height: 42px;
    font-weight: 600;
    letter-spacing: 0.3px;
    box-shadow: 0 2px 10px rgba(59, 130, 246, 0.3);
}

.dropbtn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.4);
}

.dropdown-content {
    display: block;
    position: absolute;
    right: 0;
    top: 100%;
    margin-top: 8px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(15px);
    min-width: 200px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
    border-radius: 12px;
    z-index: 1;
    opacity: 0;
    transform: translateY(-10px) scale(0.95);
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    pointer-events: none;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.dropdown-content.show {
    opacity: 1;
    transform: translateY(0) scale(1);
    pointer-events: all;
}

.dropdown-content a {
    color: #475569;
    padding: 14px 20px;
    text-decoration: none;
    display: block;
    transition: all 0.3s ease;
    transform: translateX(10px);
    opacity: 0;
    font-weight: 500;
    border-bottom: 1px solid #f1f5f9;
}

.dropdown-content a:last-child {
    border-bottom: none;
}

.dropdown-content.show a {
    transform: translateX(0);
    opacity: 1;
}

.dropdown-content a:hover {
    background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
    color: white;
    padding-left: 25px;
}

.dropdown-content a:hover i {
    color: white;
}

.dropdown-content a i {
    color: #64748b;
    width: 20px;
    text-align: center;
    transition: color 0.3s ease;
}

/* 为每个菜单项添加延迟动画 */
.dropdown-content a:nth-child(1) { transition-delay: 0.05s; }
.dropdown-content a:nth-child(2) { transition-delay: 0.1s; }
.dropdown-content a:nth-child(3) { transition-delay: 0.15s; }
.dropdown-content a:nth-child(4) { transition-delay: 0.2s; }
.dropdown-content a:nth-child(5) { transition-delay: 0.25s; }

.hero {
    text-align: center;
    padding: 5rem 2rem;
    background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
    color: white;
    margin-bottom: 3rem;
    animation: fadeIn 1s ease-out;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100" fill="none"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.05)" stroke-width="1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    animation: slideInFromTop 1s ease-out;
    font-weight: 700;
    letter-spacing: -0.5px;
    position: relative;
}

.hero p {
    font-size: 1.3rem;
    max-width: 600px;
    margin: 0 auto;
    animation: slideInFromBottom 1s ease-out;
    color: #cbd5e1;
    font-weight: 400;
    line-height: 1.8;
    position: relative;
}

.card-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2.5rem;
    padding: 0 2rem;
    margin-bottom: 4rem;
    max-width: 1400px;
    margin-left: auto;
    margin-right: auto;
}

.flow-card {
    background: white;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
    transition: all 0.4s ease;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.6s ease forwards;
    border: 1px solid #f1f5f9;
    position: relative;
}

.flow-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
}

.flow-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.card-header {
    background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
    color: white;
    padding: 1.5rem;
    font-size: 1.4rem;
    font-weight: 700;
    text-align: center;
    letter-spacing: 0.5px;
}

.card-body {
    padding: 2rem;
}

.card-features {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.feature {
    display: flex;
    align-items: center;
    gap: 15px;
}

.feature i {
    background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    width: 24px;
    font-size: 1.3rem;
    flex-shrink: 0;
}

.feature span {
    font-weight: 600;
    color: #1e293b;
    font-size: 1.1rem;
}

.feature .feature-desc {
    color: #64748b;
    font-weight: 400;
    margin-left: 8px;
}

.apply-btn {
    display: block;
    width: 100%;
    text-align: center;
    background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
    color: white;
    padding: 16px;
    border-radius: 10px;
    text-decoration: none;
    font-weight: 600;
    margin-top: 1rem;
    transition: all 0.3s ease;
    letter-spacing: 0.5px;
    border: none;
    cursor: pointer;
    font-size: 1.1rem;
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.3);
}

.apply-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(59, 130, 246, 0.4);
}

.footer {
    text-align: center;
    padding: 3rem;
    background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
    color: white;
    animation: fadeIn 1s ease-out;
}

.footer p {
    margin: 0.8rem 0;
    color: #cbd5e1;
    font-weight: 400;
}

/* 返回顶部按钮样式 */
.back-to-top {
    position: fixed;
    bottom: 40px;
    right: 40px;
    background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
    color: white;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.3rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.4s ease;
    z-index: 999;
    box-shadow: 0 6px 20px rgba(59, 130, 246, 0.4);
    border: none;
}

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

.back-to-top:hover {
    transform: translateY(-5px) scale(1.1);
    box-shadow: 0 10px 30px rgba(59, 130, 246, 0.5);
}

/* 动画定义 */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

@keyframes slideInFromTop {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInFromBottom {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 为卡片添加延迟动画效果 */
.flow-card:nth-child(1) { animation-delay: 0.1s; }
.flow-card:nth-child(2) { animation-delay: 0.2s; }
.flow-card:nth-child(3) { animation-delay: 0.3s; }
.flow-card:nth-child(4) { animation-delay: 0.4s; }
.flow-card:nth-child(5) { animation-delay: 0.5s; }
.flow-card:nth-child(6) { animation-delay: 0.6s; }

/* 响应式设计 */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.2rem;
    }
    
    .card-container {
        grid-template-columns: 1fr;
        padding: 0 1rem;
        gap: 2rem;
    }
    
    .header {
        padding: 1rem;
        min-height: 70px;
    }
    
    .back-to-top {
        bottom: 25px;
        right: 25px;
        width: 50px;
        height: 50px;
    }
    
    .dropdown-content {
        min-width: 180px;
    }
    
    .logo {
        height: 40px;
    }
    
    .dropbtn {
        height: 40px;
        padding: 10px 16px;
        font-size: 15px;
    }
    
    .hero {
        padding: 4rem 1.5rem;
    }
    
    .card-body {
        padding: 1.8rem;
    }
    
    .hero p {
        font-size: 1.1rem;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 1.9rem;
    }
    
    .hero p {
        font-size: 1rem;
    }
    
    .card-header {
        font-size: 1.2rem;
        padding: 1.2rem;
    }
    
    .card-container {
        grid-template-columns: 1fr;
    }
}

/* 加载动画样式 */
.loading-container {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 3rem;
    grid-column: 1 / -1;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 4px solid #f1f5f9;
    border-top: 4px solid #3b82f6;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.skeleton-card {
    background: white;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
    animation: pulse 2s infinite;
}

.skeleton-header {
    height: 60px;
    background: #e2e8f0;
}

.skeleton-body {
    padding: 2rem;
}

.skeleton-line {
    height: 16px;
    background: #e2e8f0;
    margin-bottom: 1rem;
    border-radius: 4px;
}

.skeleton-line.short {
    width: 60%;
}

.skeleton-line.medium {
    width: 80%;
}

.skeleton-button {
    height: 48px;
    background: #e2e8f0;
    border-radius: 10px;
    margin-top: 1rem;
}

@keyframes pulse {
    0% { opacity: 1; }
    50% { opacity: 0.7; }
    100% { opacity: 1; }
}

/* 联系方式区域样式 */
.contact-section {
    padding: 4rem 2rem;
    margin: 3rem 0;
}

.contact-container {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
}

.contact-container h2 {
    font-size: 2.5rem;
    color: #1e293b;
    margin-bottom: 1rem;
    font-weight: 700;
}

.contact-container > p {
    font-size: 1.2rem;
    color: #475569;
    margin-bottom: 3rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.contact-methods {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    max-width: 1000px;
    margin: 0 auto;
}

.contact-item {
    background: white;
    padding: 2rem;
    border-radius: 16px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
    display: flex;
    align-items: center;
    gap: 1.5rem;
    transition: all 0.3s ease;
    border-left: 4px solid #3b82f6;
}

.contact-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.12);
}

.contact-item i {
    font-size: 2.5rem;
    background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    width: 60px;
    text-align: center;
}

.contact-info {
    text-align: left;
}

.contact-label {
    display: block;
    font-size: 0.9rem;
    color: #64748b;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.contact-value {
    display: block;
    font-size: 1.3rem;
    color: #1e293b;
    font-weight: 600;
}

/* 联系方式区域样式 */
.contact-section {
    padding: 4rem 2rem;
    margin: 3rem 0;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s ease forwards;
}

.contact-container {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
}

.contact-container h2 {
    font-size: 2.5rem;
    color: #1e293b;
    margin-bottom: 1rem;
    font-weight: 700;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.8s ease forwards 0.2s;
}

.contact-container > p {
    font-size: 1.2rem;
    color: #475569;
    margin-bottom: 3rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.8s ease forwards 0.3s;
}

.contact-methods {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    max-width: 1000px;
    margin: 0 auto;
}

.contact-item {
    background: white;
    padding: 2rem;
    border-radius: 16px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
    display: flex;
    align-items: center;
    gap: 1.5rem;
    transition: all 0.3s ease;
    border-left: 4px solid #3b82f6;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.6s ease forwards;
}

.contact-item:nth-child(1) { animation-delay: 0.4s; }
.contact-item:nth-child(2) { animation-delay: 0.5s; }
.contact-item:nth-child(3) { animation-delay: 0.6s; }

.contact-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.12);
}

.contact-item i {
    font-size: 2.5rem;
    background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    width: 60px;
    text-align: center;
}

.contact-info {
    text-align: left;
}

.contact-label {
    display: block;
    font-size: 0.9rem;
    color: #64748b;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.contact-value {
    display: block;
    font-size: 1.3rem;
    color: #1e293b;
    font-weight: 600;
}

/* 警告区域样式 - 黄色样式 */
.warning-section {
    padding: 3rem 2rem;
    margin: 3rem 0;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s ease forwards 0.7s;
}

.warning-container {
    max-width: 1000px;
    margin: 0 auto;
    background: white;
    padding: 2.5rem;
    border-radius: 16px;
    box-shadow: 0 8px 30px rgba(251, 191, 36, 0.15);
    border: 2px solid #fbbf24;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.8s ease forwards 0.8s;
}

.warning-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid #fbbf24;
    opacity: 0;
    transform: translateX(-20px);
    animation: slideInFromLeft 0.8s ease forwards 0.9s;
}

.warning-header i {
    font-size: 2rem;
    color: #f59e0b;
}

.warning-header h3 {
    font-size: 2rem;
    color: #d97706;
    font-weight: 700;
    margin: 0;
}

.warning-list {
    list-style: none;
    padding: 0;
}

.warning-list li {
    padding: 1rem 0;
    font-size: 1.1rem;
    color: #92400e;
    font-weight: 500;
    border-bottom: 2px solid #fde68a;
    position: relative;
    padding-left: 2.5rem;
    opacity: 0;
    transform: translateX(-10px);
    animation: slideInFromLeft 0.6s ease forwards;
}

.warning-list li:nth-child(1) { animation-delay: 1.0s; }
.warning-list li:nth-child(2) { animation-delay: 1.1s; }
.warning-list li:nth-child(3) { animation-delay: 1.2s; }
.warning-list li:nth-child(4) { animation-delay: 1.3s; }

.warning-list li:last-child {
    border-bottom: none;
}

.warning-list li::before {
    content: '⚠️';
    position: absolute;
    left: 0;
    top: 1rem;
    font-size: 1.3rem;
    color: #f59e0b;
}

.warning-list li:hover {
    color: #b45309;
    padding-left: 2.7rem;
    transition: all 0.3s ease;
}

.warning-list li:hover::before {
    transform: scale(1.2);
    transition: transform 0.3s ease;
}

/* 新增从左滑入动画 */
@keyframes slideInFromLeft {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* 响应式设计 */
@media (max-width: 768px) {
    .contact-section {
        padding: 3rem 1rem;
    }
    
    .contact-container h2 {
        font-size: 2rem;
    }
    
    .contact-methods {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .contact-item {
        padding: 1.5rem;
        flex-direction: column;
        text-align: center;
    }
    
    .contact-info {
        text-align: center;
    }
    
    .warning-section {
        padding: 2rem 1rem;
    }
    
    .warning-container {
        padding: 2rem;
    }
    
    .warning-header {
        flex-direction: column;
        text-align: center;
        gap: 0.5rem;
    }
    
    .warning-header h3 {
        font-size: 1.7rem;
    }
    
    .warning-list li {
        font-size: 1rem;
        padding: 0.8rem 0;
        padding-left: 2.2rem;
    }
}

@media (max-width: 480px) {
    .contact-container h2 {
        font-size: 1.8rem;
    }
    
    .warning-header h3 {
        font-size: 1.5rem;
    }
    
    .warning-list li {
        font-size: 0.95rem;
    }
    
    .contact-value {
        font-size: 1.1rem;
    }
}