:root {
    /* 主要配色方案 - 更现代化的配色 */
    --primary-color: #4361ee;
    --primary-light: #5a74ee;
    --primary-dark: #334db5;
    --secondary-color: #fb8500;
    --secondary-light: #ffb347;
    --secondary-dark: #e56b00;
    
    /* 功能性颜色 */
    --success-color: #38b000;
    --info-color: #3a86ff;
    --warning-color: #ffbe0b;
    --danger-color: #d90429;
    
    /* 中性色调 */
    --dark-color: #212529;
    --gray-color: #8d99ae;
    --light-gray: #edf2f4;
    --light-color: #f8f9fa;
    
    /* 设计元素 */
    --border-radius: 10px;
    --border-radius-sm: 6px;
    --border-radius-lg: 16px;
    --box-shadow: 0 6px 20px rgba(0,0,0,0.08);
    --box-shadow-sm: 0 4px 12px rgba(0,0,0,0.05);
    --box-shadow-lg: 0 12px 28px rgba(0,0,0,0.12);
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    --transition-slow: all 0.5s cubic-bezier(0.25, 0.8, 0.25, 1);
}

/* 全局样式 */
body {
    background-color: var(--light-color);
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: var(--dark-color);
    line-height: 1.7;
    overflow-x: hidden;
    position: relative;
}

/* 导航栏样式 */
.navbar {
    box-shadow: var(--box-shadow);
    padding: 15px 0;
    background: linear-gradient(120deg, var(--primary-color), var(--primary-dark));
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: var(--transition);
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
    letter-spacing: 0.5px;
    position: relative;
    padding-left: 15px;
    transition: var(--transition);
}

.navbar-brand:before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 70%;
    background-color: var(--secondary-color);
    border-radius: 2px;
    transition: var(--transition);
}

.navbar-brand:hover:before {
    height: 90%;
    background-color: var(--secondary-light);
}

.nav-link {
    font-weight: 500;
    margin: 0 5px;
    position: relative;
    padding: 10px 16px;
    border-radius: 30px;
    transition: var(--transition);
    color: rgba(255,255,255,0.9) !important;
}

.nav-link:hover {
    background-color: rgba(255,255,255,0.15);
    transform: translateY(-2px);
    color: #fff !important;
}

.nav-item.active .nav-link {
    background-color: rgba(255,255,255,0.2);
    box-shadow: 0 4px 10px rgba(0,0,0,0.15);
    color: #fff !important;
    font-weight: 600;
}

/* 卡片样式 */
.card {
    border: none;
    border-radius: var(--border-radius);
    overflow: hidden;
    margin-bottom: 30px;
    transition: var(--transition);
    box-shadow: var(--box-shadow-sm);
    background-color: #fff;
}

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

.card-header {
    padding: 1.25rem 1.5rem;
    font-weight: 600;
    border-bottom: 1px solid rgba(0,0,0,0.05);
}

.card-header.bg-primary {
    background: linear-gradient(120deg, var(--primary-color), var(--primary-dark)) !important;
}

.card-header.bg-success {
    background: linear-gradient(120deg, var(--success-color), darken(var(--success-color), 10%)) !important;
}

.card-header.bg-warning {
    background: linear-gradient(120deg, var(--warning-color), darken(var(--warning-color), 10%)) !important;
}

.card-header.bg-danger {
    background: linear-gradient(120deg, var(--danger-color), darken(var(--danger-color), 10%)) !important;
}

.card-body {
    padding: 2rem 1.5rem;
}

/* 特性图标 */
.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
    background: linear-gradient(120deg, var(--primary-color), var(--primary-dark));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    transition: var(--transition);
}

.card:hover .feature-icon {
    transform: scale(1.1) translateY(-5px);
}

.card-title {
    font-weight: 700;
    margin-bottom: 1rem;
    font-size: 1.3rem;
    color: var(--dark-color);
    position: relative;
    padding-bottom: 0.5rem;
}

.card-title:after {
    content: '';
    position: absolute;
    width: 40px;
    height: 3px;
    background: linear-gradient(to right, var(--primary-color), var(--primary-light));
    left: 0;
    bottom: 0;
    border-radius: 5px;
    transition: var(--transition);
}

.card:hover .card-title:after {
    width: 60px;
}

.card-text {
    color: var(--gray-color);
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

/* 按钮样式 */
.btn {
    border-radius: 50px;
    padding: 10px 25px;
    font-weight: 500;
    letter-spacing: 0.3px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    text-transform: none;
}

.btn:after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 5px;
    height: 5px;
    background: rgba(255, 255, 255, 0.5);
    opacity: 0;
    border-radius: 100%;
    transform: scale(1, 1) translate(-50%);
    transform-origin: 50% 50%;
}

.btn:hover:after {
    animation: ripple 1s ease-out;
}

@keyframes ripple {
    0% {
        transform: scale(0, 0);
        opacity: 0.5;
    }
    20% {
        transform: scale(25, 25);
        opacity: 0.5;
    }
    100% {
        opacity: 0;
        transform: scale(40, 40);
    }
}

/* 主按钮 */
.btn-primary {
    background: linear-gradient(120deg, var(--primary-color), var(--primary-dark));
    border: none;
    box-shadow: 0 4px 12px rgba(67, 97, 238, 0.3);
}

.btn-primary:hover, .btn-primary:focus {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(67, 97, 238, 0.4);
    background: linear-gradient(120deg, var(--primary-light), var(--primary-color));
}

.btn-primary:active {
    transform: translateY(-1px);
}

/* 成功按钮 */
.btn-success {
    background: linear-gradient(120deg, var(--success-color), darken(var(--success-color), 10%));
    border: none;
    box-shadow: 0 4px 12px rgba(56, 176, 0, 0.3);
}

.btn-success:hover, .btn-success:focus {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(56, 176, 0, 0.4);
    background: linear-gradient(120deg, lighten(var(--success-color), 5%), var(--success-color));
}

/* 警告按钮 */
.btn-warning {
    background: linear-gradient(120deg, var(--warning-color), darken(var(--warning-color), 10%));
    border: none;
    box-shadow: 0 4px 12px rgba(255, 190, 11, 0.3);
    color: var(--dark-color);
}

.btn-warning:hover, .btn-warning:focus {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(255, 190, 11, 0.4);
    background: linear-gradient(120deg, lighten(var(--warning-color), 5%), var(--warning-color));
    color: var(--dark-color);
}

/* 危险按钮 */
.btn-danger {
    background: linear-gradient(120deg, var(--danger-color), darken(var(--danger-color), 10%));
    border: none;
    box-shadow: 0 4px 12px rgba(217, 4, 41, 0.3);
}

.btn-danger:hover, .btn-danger:focus {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(217, 4, 41, 0.4);
    background: linear-gradient(120deg, lighten(var(--danger-color), 5%), var(--danger-color));
}

/* 表单控件 */
.form-control {
    border-radius: var(--border-radius-sm);
    padding: 12px 15px;
    border: 1px solid var(--light-gray);
    transition: var(--transition);
    font-size: 1rem;
    box-shadow: none;
}

.form-control:focus {
    box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.15);
    border-color: var(--primary-color);
}

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

.form-group label {
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--dark-color);
    position: relative;
    display: inline-block;
}

.form-group label .fa, 
.form-group label .fas {
    color: var(--primary-color);
    margin-right: 5px;
}

.form-text {
    color: var(--gray-color);
    font-size: 0.85rem;
    margin-top: 5px;
}

/* 复选框样式 */
.form-check {
    padding-left: 1.8rem;
    margin-bottom: 10px;
    position: relative;
    transition: var(--transition);
    cursor: pointer;
}

.form-check:hover {
    color: var(--primary-color);
}

.form-check-input {
    position: absolute;
    margin-top: .3rem;
    margin-left: -1.8rem;
}

.form-check-label {
    display: inline-block;
    position: relative;
    padding-left: 5px;
    cursor: pointer;
}

/* 页脚样式 */
footer {
    background: linear-gradient(120deg, var(--dark-color), #343a40);
    color: white;
    padding: 60px 0 30px;
    position: relative;
    margin-top: 60px;
}

footer::before {
    content: '';
    position: absolute;
    top: -50px;
    left: 0;
    width: 100%;
    height: 50px;
    background: linear-gradient(to top right, transparent 49%, var(--dark-color) 50%);
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.footer-logo {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 20px;
    letter-spacing: 1px;
}

.footer-text {
    margin-bottom: 30px;
    max-width: 700px;
    line-height: 1.7;
}

.social-icons {
    display: flex;
    justify-content: center;
    margin-bottom: 40px;
}

.social-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    color: white;
    margin: 0 10px;
    transition: var(--transition);
    font-size: 1.2rem;
}

.social-icon:hover {
    background: var(--primary-color);
    transform: translateY(-5px);
}

/* 证书相关样式 */
.certificate-form {
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 30px;
    margin-bottom: 30px;
    position: relative;
    overflow: hidden;
}

.form-title {
    text-align: center;
    font-weight: 700;
    margin-bottom: 30px;
    position: relative;
    padding-bottom: 10px;
    color: var(--dark-color);
}

.form-title:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(to right, var(--primary-color), var(--primary-light));
    border-radius: 5px;
}

.required-field::after {
    content: '*';
    color: var(--danger-color);
    margin-left: 4px;
}

#certificateContainer {
    position: relative;
}

canvas {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 0 auto;
    box-shadow: var(--box-shadow);
    border-radius: var(--border-radius);
    background-color: white;
}

.certificate-canvas-container {
    position: relative;
    padding: 10px;
    background-color: white;
    box-shadow: var(--box-shadow);
    border-radius: var(--border-radius);
    margin-bottom: 20px;
}

/* 提示框样式 */
.alert {
    border-radius: var(--border-radius);
    padding: 15px 20px;
    margin-bottom: 20px;
    border: none;
    position: relative;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
    animation: fadeIn 0.5s ease;
}

.alert .close {
    position: absolute;
    top: 14px;
    right: 15px;
    opacity: 0.6;
    transition: var(--transition);
}

.alert .close:hover {
    opacity: 1;
}

.alert-success {
    background-color: rgba(56, 176, 0, 0.1);
    color: var(--success-color);
    border-left: 4px solid var(--success-color);
}

.alert-warning {
    background-color: rgba(255, 190, 11, 0.1);
    color: darken(var(--warning-color), 15%);
    border-left: 4px solid var(--warning-color);
}

.alert-danger {
    background-color: rgba(217, 4, 41, 0.1);
    color: var(--danger-color);
    border-left: 4px solid var(--danger-color);
}

.alert-info {
    background-color: rgba(67, 97, 238, 0.1);
    color: var(--primary-color);
    border-left: 4px solid var(--primary-color);
}

/* 徽章样式 */
.badge {
    padding: 5px 10px;
    font-weight: 500;
    border-radius: 20px;
    font-size: 0.75rem;
    text-transform: none;
}

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

.badge-success {
    background-color: var(--success-color);
    color: white;
}

.badge-warning {
    background-color: var(--warning-color);
    color: var(--dark-color);
}

.badge-danger {
    background-color: var(--danger-color);
    color: white;
}

.badge-info {
    background-color: var(--info-color);
    color: white;
}

.badge-paid {
    background-color: var(--success-color);
    color: white;
}

.badge-unpaid {
    background-color: var(--danger-color);
    color: white;
}

/* 动画效果 */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes slideInUp {
    from {
        transform: translateY(40px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

@keyframes slideInLeft {
    from {
        transform: translateX(-40px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes slideInRight {
    from {
        transform: translateX(40px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes scaleIn {
    from {
        transform: scale(0.95);
        opacity: 0;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}

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

.fade-in {
    animation: fadeIn 0.5s ease forwards;
}

.slide-in-up {
    animation: slideInUp 0.5s ease forwards;
}

.slide-in-left {
    animation: slideInLeft 0.5s ease forwards;
}

.slide-in-right {
    animation: slideInRight 0.5s ease forwards;
}

.scale-in {
    animation: scaleIn 0.5s ease forwards;
}

.pulse {
    animation: pulse 2s infinite;
}

/* 增强型输入框样式 */
.animated-input {
    position: relative;
}

.animated-input label {
    position: absolute;
    left: 15px;
    top: 12px;
    color: var(--gray-color);
    transition: var(--transition);
    pointer-events: none;
    background: transparent;
    padding: 0 5px;
}

.animated-input .form-control:focus,
.animated-input .form-control:not(:placeholder-shown) {
    padding-top: 20px;
    padding-bottom: 4px;
}

.animated-input .form-control:focus ~ label,
.animated-input .form-control:not(:placeholder-shown) ~ label {
    top: -10px;
    left: 10px;
    font-size: 0.85rem;
    color: var(--primary-color);
    background: #fff;
}

/* 卡片增强动画 */
.hover-card {
    transition: var(--transition);
    position: relative;
    z-index: 1;
}

.hover-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(120deg, rgba(67, 97, 238, 0.1), rgba(67, 97, 238, 0));
    border-radius: var(--border-radius);
    opacity: 0;
    transition: var(--transition);
    z-index: -1;
}

.hover-card:hover::before {
    opacity: 1;
}

/* 表格样式 */
.table {
    width: 100%;
    margin-bottom: 1rem;
    color: var(--dark-color);
    border-collapse: separate;
    border-spacing: 0;
}

.table th,
.table td {
    padding: 1rem 0.75rem;
    vertical-align: middle;
    border-top: 1px solid #e9ecef;
}

.table thead th {
    vertical-align: bottom;
    border-bottom: 2px solid #e9ecef;
    background-color: #f8f9fa;
    color: var(--dark-color);
    font-weight: 600;
}

.table tbody + tbody {
    border-top: 2px solid #e9ecef;
}

.table-hover tbody tr:hover {
    background-color: rgba(67, 97, 238, 0.03);
}

.table-striped tbody tr:nth-of-type(odd) {
    background-color: rgba(0, 0, 0, 0.02);
}

/* 响应式调整 */
@media (max-width: 992px) {
    .container {
        max-width: 100%;
        padding-left: 20px;
        padding-right: 20px;
    }
    
    .navbar-collapse {
        background-color: var(--primary-dark);
        border-radius: var(--border-radius);
        box-shadow: var(--box-shadow);
        padding: 15px;
        margin-top: 10px;
    }
    
    .nav-item {
        margin-bottom: 5px;
    }
}

@media (max-width: 768px) {
    h1 {
        font-size: 2.2rem;
    }
    
    .card-body {
        padding: 1.5rem 1.2rem;
    }
    
    .form-group label {
        font-size: 0.95rem;
    }
    
    .form-control {
        padding: 10px 12px;
    }
    
    .btn {
        padding: 8px 20px;
    }
    
    footer .container {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 576px) {
    h1 {
        font-size: 1.8rem;
    }
    
    .card {
        margin-bottom: 20px;
    }
    
    .mt-5 {
        margin-top: 2rem !important;
    }
    
    .mb-4 {
        margin-bottom: 1.5rem !important;
    }
    
    .certificate-form {
        padding: 20px 15px;
    }
    
    .form-title {
        font-size: 1.5rem;
    }
}

/* 加载动画 */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(255, 255, 255, 0.8);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    visibility: hidden;
    opacity: 0;
    transition: var(--transition);
}

.loading-overlay.active {
    visibility: visible;
    opacity: 1;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid rgba(67, 97, 238, 0.2);
    border-radius: 50%;
    border-top-color: var(--primary-color);
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* 新的进度条样式 */
.progress {
    height: 8px;
    overflow: hidden;
    background-color: #e9ecef;
    border-radius: 30px;
    box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.1);
    margin-bottom: 1rem;
}

.progress-bar {
    display: flex;
    flex-direction: column;
    justify-content: center;
    overflow: hidden;
    color: #fff;
    text-align: center;
    white-space: nowrap;
    background-color: var(--primary-color);
    transition: width 0.6s ease;
    border-radius: 30px;
}

/* 新增悬浮卡片效果 */
.card-hover-effect {
    transition: transform 0.3s, box-shadow 0.3s;
    border-radius: var(--border-radius);
    overflow: hidden;
}

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

/* 波浪按钮效果 */
.btn-wave {
    position: relative;
    overflow: hidden;
}

.btn-wave:after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 5px;
    height: 5px;
    background: rgba(255, 255, 255, 0.5);
    opacity: 0;
    border-radius: 100%;
    transform: scale(1, 1) translate(-50%);
    transform-origin: 50% 50%;
}

.btn-wave:active:after {
    animation: ripple 1s ease-out;
}

/* 自定义复选框和单选框 */
.custom-control {
    position: relative;
    display: block;
    min-height: 1.5rem;
    padding-left: 1.5rem;
}

.custom-checkbox .custom-control-label::before {
    border-radius: 0.25rem;
}

.custom-control-input:checked ~ .custom-control-label::before {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.custom-control-label::before {
    position: absolute;
    top: 0.25rem;
    left: -1.5rem;
    display: block;
    width: 1rem;
    height: 1rem;
    content: "";
    background-color: #fff;
    border: 1px solid #adb5bd;
    transition: background-color 0.15s ease-in-out, border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

/* 回到顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: -60px;
    right: 30px;
    width: 50px;
    height: 50px;
    background-color: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.5s ease;
    opacity: 0;
    z-index: 99;
    border: none;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    outline: none !important;
}

.back-to-top.show {
    bottom: 30px;
    opacity: 1;
}

.back-to-top:hover {
    background-color: var(--primary-dark);
    transform: translateY(-5px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.2);
}

/* 暗黑模式样式 */
.nav-theme-toggle {
    width: 38px;
    height: 38px;
    margin-left: 10px;
    background-color: rgba(255, 255, 255, 0.2);
    border: none;
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.nav-theme-toggle:hover,
.nav-theme-toggle:focus {
    background-color: rgba(255, 255, 255, 0.3);
    color: white;
    transform: rotate(15deg);
}

.dark-mode {
    background-color: #121212;
    color: #f0f0f0;
}

.dark-mode .card,
.dark-mode .certificate-form,
.dark-mode .form-control,
.dark-mode .modal-content,
.dark-mode .dropdown-menu {
    background-color: #1e1e1e;
    color: #f0f0f0;
    border-color: #333;
}

.dark-mode .card-title,
.dark-mode .form-title,
.dark-mode .modal-title,
.dark-mode h1, 
.dark-mode h2, 
.dark-mode h3, 
.dark-mode h4, 
.dark-mode h5, 
.dark-mode h6 {
    color: #f0f0f0;
}

.dark-mode .card-text,
.dark-mode .form-text,
.dark-mode .text-muted {
    color: #aaa !important;
}

.dark-mode .form-control {
    border-color: #444;
    color: #f0f0f0;
    background-color: #2a2a2a;
}

.dark-mode .form-control:focus {
    border-color: var(--primary-color);
    background-color: #2a2a2a;
}

.dark-mode .table {
    color: #f0f0f0;
}

.dark-mode .table th,
.dark-mode .table td {
    border-color: #333;
}

.dark-mode .table thead th {
    background-color: #2a2a2a;
    color: #f0f0f0;
}

.dark-mode .table-hover tbody tr:hover {
    background-color: rgba(67, 97, 238, 0.1);
}

.dark-mode .table-striped tbody tr:nth-of-type(odd) {
    background-color: rgba(255, 255, 255, 0.05);
}

.dark-mode .dropdown-item {
    color: #f0f0f0;
}

.dark-mode .dropdown-item:hover,
.dark-mode .dropdown-item:focus {
    background-color: rgba(67, 97, 238, 0.1);
    color: #fff;
}

.dark-mode .modal-header,
.dark-mode .modal-footer {
    border-color: #333;
}

.dark-mode .close {
    color: #f0f0f0;
}

/* 表格移动端响应式处理 */
.table-mobile {
    margin-top: 20px;
}

.table-mobile-row {
    padding: 15px;
    border-radius: var(--border-radius-sm);
    background-color: white;
    margin-bottom: 15px;
    box-shadow: var(--box-shadow-sm);
    transition: var(--transition);
}

.table-mobile-row:hover {
    box-shadow: var(--box-shadow);
    transform: translateY(-2px);
}

.table-mobile-cell {
    padding: 8px 0;
    border-bottom: 1px solid #eee;
}

.table-mobile-cell:last-child {
    border-bottom: none;
}

.table-mobile-header {
    font-weight: 600;
    color: var(--dark-color);
    margin-right: 10px;
}

.dark-mode .table-mobile-row {
    background-color: #1e1e1e;
}

.dark-mode .table-mobile-cell {
    border-color: #333;
}

.dark-mode .table-mobile-header {
    color: #f0f0f0;
}

/* 动态表单样式 */
.form-group.focused .form-control {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.15);
}

.form-group.focused label {
    color: var(--primary-color);
}

/* 英雄区样式 */
.hero-section {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    padding: 60px 0;
    position: relative;
    overflow: hidden;
    border-radius: 0 0 50% 50% / 15%;
    margin-bottom: 60px;
    box-shadow: var(--box-shadow);
}

.hero-title {
    font-size: 2.8rem;
    font-weight: 700;
    margin-bottom: 20px;
    position: relative;
    display: inline-block;
}

.hero-title:after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background-color: var(--secondary-color);
    border-radius: 2px;
}

.hero-description {
    font-size: 1.3rem;
    font-weight: 300;
    max-width: 700px;
    margin: 0 auto;
    opacity: 0.9;
}

.hero-shape-1,
.hero-shape-2 {
    position: absolute;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
}

.hero-shape-1 {
    width: 300px;
    height: 300px;
    top: -100px;
    right: -100px;
}

.hero-shape-2 {
    width: 200px;
    height: 200px;
    bottom: -50px;
    left: -50px;
}

/* FAQ部分样式 */
.faq-section {
    padding: 30px;
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow-sm);
}

.faq-button {
    text-decoration: none !important;
    color: var(--dark-color) !important;
    font-weight: 600;
    padding: 0;
}

.faq-button:focus {
    box-shadow: none;
}

.faq-icon {
    transition: var(--transition);
    color: var(--primary-color);
}

/* 表单步骤样式 */
.form-step {
    display: none;
}

.form-step.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

.progress {
    height: 8px;
    border-radius: 4px;
    background-color: var(--light-gray);
    margin-bottom: 30px;
    overflow: hidden;
}

.progress-bar {
    background: linear-gradient(to right, var(--primary-color), var(--primary-light));
    border-radius: 4px;
    transition: width 0.5s ease;
}

/* 信息框样式 */
.info-box {
    padding: 25px;
    background-color: rgba(67, 97, 238, 0.05);
    border-left: 4px solid var(--primary-color);
    border-radius: var(--border-radius-sm);
    margin-bottom: 30px;
}

.info-box h5 {
    color: var(--primary-color);
    margin-bottom: 15px;
}

.info-box p:last-child {
    margin-bottom: 0;
}

/* 证书卡片特殊样式 */
.certificate-card {
    border: none;
    overflow: visible;
}

.certificate-card .card-header {
    background: linear-gradient(120deg, var(--primary-color), var(--primary-dark));
    color: white;
    border-radius: var(--border-radius) var(--border-radius) 0 0;
    padding: 20px 25px;
}

/* Hover卡片效果 */
.hover-card {
    position: relative;
    transition: var(--transition);
    z-index: 1;
}

.hover-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(67, 97, 238, 0.05), rgba(255, 255, 255, 0));
    border-radius: var(--border-radius);
    z-index: -1;
    opacity: 0;
    transition: var(--transition);
}

.hover-card:hover::before {
    opacity: 1;
}

/* 动画效果 */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

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

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

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

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* 动画类 */
.fade-in {
    animation: fadeIn 0.8s ease-in-out;
}

.slide-in-up {
    animation: slideInUp 0.8s ease-in-out;
}

.slide-in-left {
    animation: slideInLeft 0.8s ease-in-out;
}

.slide-in-right {
    animation: slideInRight 0.8s ease-in-out;
}

.scale-in {
    animation: scaleIn 0.8s ease-in-out;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .container {
        max-width: 100%;
        padding: 0 20px;
    }
    
    .navbar-collapse {
        background-color: var(--primary-dark);
        padding: 15px;
        border-radius: var(--border-radius);
        margin-top: 10px;
    }
    
    .nav-item {
        margin-bottom: 5px;
    }
}

@media (max-width: 768px) {
    h1 {
        font-size: 2rem;
    }
    
    .card-body {
        padding: 1.5rem 1.25rem;
    }
    
    .form-group label {
        font-size: 0.9rem;
    }
    
    .form-control {
        padding: 10px 12px;
    }
    
    .btn {
        padding: 8px 20px;
    }
    
    .hero-section {
        padding: 40px 0;
        border-radius: 0 0 25% 25% / 10%;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-description {
        font-size: 1.1rem;
    }
}

@media (max-width: 576px) {
    h1 {
        font-size: 1.8rem;
    }
    
    .card {
        margin-bottom: 20px;
    }
    
    .mt-5 {
        margin-top: 2rem !important;
    }
    
    .mb-4 {
        margin-bottom: 1.5rem !important;
    }
    
    .certificate-form {
        padding: 15px;
    }
    
    .form-title {
        font-size: 1.5rem;
    }
}

/* 加载动画 */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(255, 255, 255, 0.9);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.loading-overlay.active {
    opacity: 1;
    visibility: visible;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 3px solid rgba(67, 97, 238, 0.2);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* 暗黑模式样式 */
.dark-mode {
    background-color: #1a1d23;
    color: #e6e8ea;
}

.dark-mode .card,
.dark-mode .faq-section,
.dark-mode .info-box {
    background-color: #262a33;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}

.dark-mode .card-title,
.dark-mode .faq-button,
.dark-mode h1, 
.dark-mode h2, 
.dark-mode h3, 
.dark-mode h4, 
.dark-mode h5, 
.dark-mode h6 {
    color: #e6e8ea;
}

.dark-mode .card-text,
.dark-mode .form-text,
.dark-mode .text-muted {
    color: #a0a4aa !important;
}

.dark-mode .form-control {
    background-color: #323640;
    border-color: #3a3f4b;
    color: #e6e8ea;
}

.dark-mode .form-control:focus {
    background-color: #3a3f4b;
    box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.2);
}

.dark-mode .table {
    color: #e6e8ea;
}

.dark-mode .table th,
.dark-mode .table td {
    border-color: #3a3f4b;
}

.dark-mode .table thead th {
    background-color: #323640;
}

.dark-mode .table-hover tbody tr:hover {
    background-color: rgba(67, 97, 238, 0.1);
}

.dark-mode .table-striped tbody tr:nth-of-type(odd) {
    background-color: rgba(255, 255, 255, 0.03);
}

.dark-mode .loading-overlay {
    background-color: rgba(26, 29, 35, 0.9);
}

.dark-mode .close {
    color: #e6e8ea;
}

/* 回到顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: -60px;
    right: 30px;
    width: 50px;
    height: 50px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    box-shadow: 0 4px 15px rgba(67, 97, 238, 0.3);
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    z-index: 99;
    transition: var(--transition);
    opacity: 0;
}

.back-to-top.show {
    bottom: 30px;
    opacity: 1;
}

.back-to-top:hover {
    background-color: var(--primary-dark);
    transform: translateY(-5px);
    box-shadow: 0 6px 20px rgba(67, 97, 238, 0.4);
}

/* 主题切换按钮 */
.nav-theme-toggle {
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.15);
    border: none;
    color: white;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: var(--transition);
    margin-left: 10px;
}

.nav-theme-toggle:hover,
.nav-theme-toggle:focus {
    background-color: rgba(255, 255, 255, 0.25);
    color: white;
}