@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
    --bg-primary: #0a0a1a;
    --bg-secondary: #12122a;
    --bg-card: rgba(25, 25, 60, 0.7);
    --bg-glass: rgba(255, 255, 255, 0.04);
    --border-glass: rgba(255, 255, 255, 0.08);
    --text-primary: #e8e8f0;
    --text-secondary: #8888aa;
    --text-muted: #555570;
    --accent: #6c5ce7;
    --accent-light: #a29bfe;
    --accent-glow: rgba(108, 92, 231, 0.3);
    --success: #00cec9;
    --danger: #ff6b6b;
    --warning: #feca57;
    --radius: 16px;
    --radius-sm: 10px;
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
}

/* 背景动画 */
body::before {
    content: '';
    position: fixed;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 20% 50%, rgba(108, 92, 231, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(0, 206, 201, 0.06) 0%, transparent 50%),
        radial-gradient(circle at 50% 80%, rgba(162, 155, 254, 0.05) 0%, transparent 50%);
    animation: bgFloat 20s ease-in-out infinite;
    z-index: -1;
}

@keyframes bgFloat {

    0%,
    100% {
        transform: translate(0, 0) rotate(0deg);
    }

    25% {
        transform: translate(-2%, 1%) rotate(1deg);
    }

    50% {
        transform: translate(1%, -1%) rotate(-0.5deg);
    }

    75% {
        transform: translate(-1%, 2%) rotate(0.5deg);
    }
}

/* 导航栏 */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 40px;
    background: rgba(10, 10, 26, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-glass);
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar .logo {
    font-size: 1.4rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-light), var(--success));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 1px;
}

.navbar nav a {
    color: var(--text-secondary);
    text-decoration: none;
    margin-left: 32px;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.3s;
    position: relative;
}

.navbar nav a:hover,
.navbar nav a.active {
    color: var(--text-primary);
}

.navbar nav a.active::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, var(--accent), var(--accent-light));
    border-radius: 1px;
}

/* 主容器 */
.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 40px 24px;
}

/* Hero区 */
.hero {
    text-align: center;
    margin-bottom: 40px;
}

.hero h1 {
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 12px;
    background: linear-gradient(135deg, #fff, var(--accent-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.3;
}

.hero p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    max-width: 500px;
    margin: 0 auto;
    line-height: 1.6;
}

/* 卡片 */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius);
    padding: 32px;
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow);
    transition: border-color 0.3s, transform 0.3s;
}

.card:hover {
    border-color: rgba(108, 92, 231, 0.2);
}

.card-header {
    text-align: center;
    margin-bottom: 32px;
}

.card-header h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 8px;
}

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

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 14px 18px;
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.95rem;
    font-family: inherit;
    transition: border-color 0.3s, box-shadow 0.3s;
    outline: none;
}

.form-group input::placeholder {
    color: var(--text-muted);
}

.form-group input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

/* 按钮 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 32px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.3s;
    text-decoration: none;
    gap: 8px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent), #8b5cf6);
    color: #fff;
    box-shadow: 0 4px 20px var(--accent-glow);
    width: 100%;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(108, 92, 231, 0.5);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.btn-secondary {
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    color: var(--text-primary);
}

.btn-secondary:hover {
    border-color: var(--accent);
    background: rgba(108, 92, 231, 0.1);
}

/* 状态服务指示 */
.service-status {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 20px;
    background: var(--bg-glass);
    border-radius: var(--radius-sm);
    margin-bottom: 24px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--success);
    box-shadow: 0 0 8px rgba(0, 206, 201, 0.5);
    animation: pulse 2s ease-in-out infinite;
}

.status-dot.offline {
    background: var(--danger);
    box-shadow: 0 0 8px rgba(255, 107, 107, 0.5);
    animation: none;
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.4;
    }
}

/* Loading */
.loading-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(10, 10, 26, 0.9);
    backdrop-filter: blur(10px);
    z-index: 1000;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 24px;
}

.loading-overlay.active {
    display: flex;
}

.spinner {
    width: 48px;
    height: 48px;
    border: 3px solid var(--border-glass);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.loading-text {
    font-size: 1.1rem;
    color: var(--text-secondary);
    text-align: center;
    line-height: 1.6;
}

.loading-warning {
    font-size: 0.85rem;
    color: var(--warning);
    margin-top: 8px;
}

/* 结果模态框 */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(10, 10, 26, 0.85);
    backdrop-filter: blur(10px);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal-overlay.active {
    display: flex;
}

.modal {
    background: var(--bg-secondary);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius);
    padding: 48px 40px;
    max-width: 480px;
    width: 90%;
    text-align: center;
    box-shadow: 0 24px 64px rgba(0, 0, 0, 0.5);
    animation: modalIn 0.3s ease-out;
}

@keyframes modalIn {
    from {
        opacity: 0;
        transform: scale(0.9) translateY(20px);
    }

    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.modal-icon {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    margin: 0 auto 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
}

.modal-icon.success {
    background: rgba(0, 206, 201, 0.15);
    color: var(--success);
}

.modal-icon.error {
    background: rgba(255, 107, 107, 0.15);
    color: var(--danger);
}

.modal h3 {
    font-size: 1.4rem;
    margin-bottom: 12px;
}

.modal p {
    color: var(--text-secondary);
    margin-bottom: 24px;
    line-height: 1.6;
}

.modal .key-display {
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-sm);
    padding: 16px;
    font-family: 'Courier New', monospace;
    font-size: 0.95rem;
    color: var(--accent-light);
    word-break: break-all;
    margin-bottom: 24px;
    user-select: all;
    cursor: pointer;
}

.modal .key-display:hover {
    border-color: var(--accent);
}

/* 支付区域 */
.pay-section {
    text-align: center;
    margin-top: 24px;
}

.pay-qr {
    width: 200px;
    height: 200px;
    background: #fff;
    border-radius: 12px;
    margin: 0 auto 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 8px;
}

.pay-qr img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.pay-amount {
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent-light);
    margin-bottom: 8px;
}

.pay-tip {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* 步骤指示 */
.steps {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin-bottom: 48px;
}

.step {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    opacity: 0.4;
    transition: opacity 0.3s;
}

.step.active {
    opacity: 1;
}

.step-num {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--bg-glass);
    border: 2px solid var(--border-glass);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    font-weight: 600;
}

.step.active .step-num {
    background: var(--accent);
    border-color: var(--accent);
}

.step-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* 响应式 */
@media (max-width: 768px) {
    .navbar {
        padding: 16px 20px;
    }

    .navbar nav a {
        margin-left: 20px;
        font-size: 0.8rem;
    }

    .container {
        padding: 40px 16px;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .card {
        padding: 28px 20px;
    }

    .steps {
        gap: 20px;
    }
}