/* 全局样式 */
:root {
    --primary-color: #00d4ff;
    --secondary-color: #0099cc;
    --accent-color: #ff00ff;
    --bg-dark: #0a0e27;
    --bg-light: #12183a;
    --text-primary: #ffffff;
    --text-secondary: #b0b8d4;
    --card-bg: rgba(255, 255, 255, 0.05);
    --border-color: rgba(0, 212, 255, 0.2);
    --shadow: 0 8px 32px rgba(0, 212, 255, 0.1);
    --gradient: linear-gradient(135deg, #00d4ff 0%, #0099cc 100%);
    --gradient-hover: linear-gradient(135deg, #0099cc 0%, #00d4ff 100%);
}

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

body {
    font-family: 'Rajdhani', sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

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

/* 科技背景效果 */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 20% 50%, rgba(0, 212, 255, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 80% 80%, rgba(255, 0, 255, 0.1) 0%, transparent 50%);
    pointer-events: none;
    z-index: -1;
}

/* 标题样式 */
h1, h2, h3, h4 {
    font-family: 'Orbitron', sans-serif;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
}

h1 span {
    color: var(--primary-color);
}

h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

h3 {
    font-size: 2rem;
    margin-bottom: 2rem;
    text-align: center;
    color: var(--primary-color);
}

h4 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

/* 头部样式 */
header {
    background: rgba(10, 14, 39, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 1rem 0;
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo h1 {
    font-size: 1.8rem;
    margin: 0;
}

nav {
    display: flex;
    gap: 2rem;
}

nav a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
    padding: 0.5rem 0;
}

nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient);
    transition: width 0.3s ease;
}

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

nav a:hover::after {
    width: 100%;
}

/* 英雄区域 */
.hero {
    padding: 6rem 0;
    background: linear-gradient(135deg, var(--bg-dark) 0%, var(--bg-light) 100%);
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-content p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.8;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 0.8rem 2rem;
    border: none;
    border-radius: 30px;
    font-family: 'Rajdhani', sans-serif;
    font-size: 1.1rem;
    font-weight: 600;
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s ease;
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: var(--gradient);
    color: var(--bg-dark);
    box-shadow: 0 4px 15px rgba(0, 212, 255, 0.3);
}

.btn-primary:hover {
    background: var(--gradient-hover);
    box-shadow: 0 6px 20px rgba(0, 212, 255, 0.4);
    transform: translateY(-2px);
}

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

.btn-secondary:hover {
    background: var(--primary-color);
    color: var(--bg-dark);
    box-shadow: 0 4px 15px rgba(0, 212, 255, 0.3);
}

/* 科技感图片 */
.tech-image {
    width: 100%;
    height: auto;
    border-radius: 15px;
    box-shadow: 0 10px 40px rgba(0, 212, 255, 0.2);
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.tech-image:hover {
    transform: scale(1.02);
    box-shadow: 0 15px 50px rgba(0, 212, 255, 0.3);
}

/* 功能区块 */
.features {
    padding: 6rem 0;
    background: var(--bg-light);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.feature-card {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 15px;
    border: 1px solid var(--border-color);
    text-align: center;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

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

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    display: block;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* 工作流程 */
.how-it-works {
    padding: 6rem 0;
    background: var(--bg-dark);
}

.steps {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 2rem;
    margin-top: 3rem;
    flex-wrap: wrap;
}

.step {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 15px;
    border: 1px solid var(--border-color);
    text-align: center;
    flex: 1;
    min-width: 200px;
    position: relative;
    backdrop-filter: blur(10px);
}

.step-number {
    font-family: 'Orbitron', sans-serif;
    font-size: 2rem;
    font-weight: 900;
    color: var(--primary-color);
    margin-bottom: 1rem;
    display: block;
}

.step-arrow {
    font-size: 2rem;
    color: var(--primary-color);
    margin: 0 1rem;
    align-self: center;
}

.step p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* 表单样式 */
.form-section {
    padding: 6rem 0;
    background: var(--bg-light);
}

.form-container {
    max-width: 500px;
    margin: 0 auto;
    background: var(--card-bg);
    padding: 3rem;
    border-radius: 20px;
    border: 1px solid var(--border-color);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow);
}

.form-container h3 {
    margin-bottom: 2rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.8rem 1rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-family: 'Rajdhani', sans-serif;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
    background: rgba(255, 255, 255, 0.08);
}

.form-group input::placeholder {
    color: var(--text-secondary);
    opacity: 0.7;
}

.form-btn {
    width: 100%;
    margin-top: 1rem;
}

/* 信息提示 */
.message {
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
    font-weight: 500;
}

.message.success {
    background: rgba(0, 255, 128, 0.1);
    border: 1px solid rgba(0, 255, 128, 0.3);
    color: #00ff80;
}

.message.error {
    background: rgba(255, 0, 80, 0.1);
    border: 1px solid rgba(255, 0, 80, 0.3);
    color: #ff0050;
}

.message.info {
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.3);
    color: var(--primary-color);
}

/* 步骤指示器 */
.steps-indicator {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding: 1rem 0;
    position: relative;
}

.steps-indicator::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--border-color);
    transform: translateY(-50%);
    z-index: 0;
}

.step-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
    z-index: 1;
    flex: 1;
    transition: all 0.3s ease;
}

.step-number {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--bg-light);
    border: 2px solid var(--border-color);
    display: flex;
    justify-content: center;
    align-items: center;
    font-family: 'Orbitron', sans-serif;
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    transition: all 0.3s ease;
}

.step-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-align: center;
    transition: all 0.3s ease;
}

.step-item.active .step-number {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: var(--bg-dark);
    box-shadow: 0 0 15px rgba(0, 212, 255, 0.5);
}

.step-item.active .step-label {
    color: var(--primary-color);
    font-weight: 600;
}

.step-item.completed .step-number {
    background: rgba(0, 255, 128, 0.2);
    border-color: #00ff80;
    color: #00ff80;
}

.step-item.completed .step-label {
    color: #00ff80;
}

/* 验证部分样式 */
.verify-section,
.generate-section,
.download-section {
    background: rgba(255, 255, 255, 0.03);
    padding: 2rem;
    border-radius: 15px;
    border: 1px solid var(--border-color);
    margin-top: 1rem;
}

.verify-method {
    background: rgba(255, 255, 255, 0.02);
    padding: 1.5rem;
    border-radius: 10px;
    margin: 1rem 0;
}

.verify-method h5 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1rem;
}

.verify-method ol {
    margin-left: 1.5rem;
    margin-bottom: 1rem;
}

.verify-method ol li {
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}

.verify-method ul {
    margin-left: 1.5rem;
    margin-bottom: 1rem;
}

.verify-method ul li {
    margin-bottom: 0.3rem;
    color: var(--text-secondary);
}

.verify-method code {
    background: rgba(255, 255, 255, 0.1);
    padding: 0.3rem 0.6rem;
    border-radius: 5px;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    color: var(--primary-color);
    word-break: break-all;
    display: block;
    margin: 0.5rem 0;
}

/* 下载按钮样式 */
.download-buttons {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin: 2rem 0;
}

.download-buttons .btn {
    text-align: center;
}

/* 生成证书部分样式 */
.generate-section p,
.download-section p {
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}

.generate-section p strong,
.download-section p strong {
    color: var(--primary-color);
}

/* 仪表盘样式 */
.dashboard {
    padding: 4rem 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.stat-card {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 15px;
    border: 1px solid var(--border-color);
    text-align: center;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

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

.stat-number {
    font-family: 'Orbitron', sans-serif;
    font-size: 3rem;
    font-weight: 900;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* 证书列表 */
.certificates-section {
    padding: 4rem 0;
}

.cert-list {
    background: var(--card-bg);
    border-radius: 15px;
    border: 1px solid var(--border-color);
    overflow: hidden;
    backdrop-filter: blur(10px);
}

.cert-list table {
    width: 100%;
    border-collapse: collapse;
}

.cert-list th,
.cert-list td {
    padding: 1.2rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.cert-list th {
    background: rgba(0, 212, 255, 0.1);
    color: var(--primary-color);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.9rem;
    letter-spacing: 1px;
}

.cert-list td {
    color: var(--text-secondary);
}

.cert-list tr:last-child td {
    border-bottom: none;
}

.cert-list tr:hover {
    background: rgba(0, 212, 255, 0.05);
}

/* 状态标签 */
.status {
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.status.active {
    background: rgba(0, 255, 128, 0.1);
    color: #00ff80;
}

.status.expired {
    background: rgba(255, 0, 80, 0.1);
    color: #ff0050;
}

.status.pending {
    background: rgba(255, 200, 0, 0.1);
    color: #ffc800;
}

/* 操作按钮 */
.action-btn {
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-size: 0.85rem;
    text-decoration: none;
    margin-right: 0.5rem;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-family: 'Rajdhani', sans-serif;
    font-weight: 500;
}

.action-btn.primary {
    background: var(--primary-color);
    color: var(--bg-dark);
}

.action-btn.primary:hover {
    background: var(--secondary-color);
    box-shadow: 0 2px 8px rgba(0, 212, 255, 0.3);
}

.action-btn.secondary {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

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

/* 页脚 */
footer {
    background: var(--bg-dark);
    border-top: 1px solid var(--border-color);
    padding: 2rem 0;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-image {
        margin-top: 2rem;
    }
    
    .cta-buttons {
        justify-content: center;
    }
    
    .steps {
        flex-direction: column;
        text-align: center;
    }
    
    .step-arrow {
        transform: rotate(90deg);
        margin: 1rem 0;
    }
    
    nav {
        gap: 1rem;
    }
    
    .logo h1 {
        font-size: 1.5rem;
    }
    
    .form-container {
        padding: 2rem;
        margin: 0 1rem;
    }
}

@media (max-width: 480px) {
    header .container {
        flex-direction: column;
        gap: 1rem;
    }
    
    nav {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .cert-list table {
        font-size: 0.8rem;
    }
    
    .cert-list th,
    .cert-list td {
        padding: 0.8rem 0.5rem;
    }
    
    .action-btn {
        padding: 0.3rem 0.6rem;
        font-size: 0.75rem;
        margin-right: 0.3rem;
        margin-bottom: 0.3rem;
    }
}