:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --accent: #f59e0b;
    --bg-deep: #f8fafc; /* 浅灰色背景 */
    --bg-card: #ffffff; /* 纯白卡片 */
    --text-main: #1e293b; /* 深色文字 */
    --text-dim: #64748b; /* 灰色辅助文字 */
    --border: #e2e8f0;
    --glass: rgba(255, 255, 255, 0.8);
    --success: #10b981;
    --font-main: 'Inter', system-ui, sans-serif;
    --font-title: 'Outfit', sans-serif;
    --card-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

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

body {
    background-color: var(--bg-deep);
    color: var(--text-main);
    font-family: var(--font-main);
    line-height: 1.6;
    overflow-x: hidden;
    background-image: 
        radial-gradient(circle at 10% 20%, rgba(37, 99, 235, 0.03) 0%, transparent 40%),
        radial-gradient(circle at 90% 80%, rgba(245, 158, 11, 0.03) 0%, transparent 40%);
}

.app-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
    min-height: 100vh;
}

@media (max-width: 768px) {
    .app-container {
        padding: 1rem;
    }
}

/* Header Styles */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border);
    flex-wrap: wrap;
    gap: 1rem;
}

.brand {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-title);
    font-weight: 700;
    font-size: 1.5rem;
    box-shadow: 0 0 20px rgba(59, 130, 246, 0.3);
}

.logo-text h1 {
    font-family: var(--font-title);
    font-size: 1.5rem;
    letter-spacing: -0.5px;
}

.logo-text span {
    font-size: 0.8rem;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 2px;
}

.auction-status {
    display: flex;
    align-items: center;
    gap: 2rem;
    background: var(--glass);
    padding: 0.75rem 1.5rem;
    border-radius: 99px;
    border: 1px solid var(--border);
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    color: var(--success);
}

.dot {
    width: 8px;
    height: 8px;
    background-color: var(--success);
    border-radius: 50%;
}

.pulse {
    animation: pulse-animation 2s infinite;
}

@keyframes pulse-animation {
    0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
    70% { transform: scale(1); box-shadow: 0 0 0 10px rgba(16, 185, 129, 0); }
    100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.countdown {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.countdown .time {
    font-family: 'Courier New', Courier, monospace;
    font-weight: 700;
    color: var(--accent);
    font-size: 1.2rem;
}

/* Content Layout */
.content-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 2rem;
}

.glass {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 24px;
    box-shadow: var(--card-shadow);
}

.card {
    padding: 2rem;
    height: 100%;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 2rem;
}

.card-header h2 {
    font-family: var(--font-title);
    font-size: 1.75rem;
}

.tag {
    background: var(--primary);
    padding: 0.25rem 0.75rem;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 700;
}

/* Info Section */
.main-image {
    width: 100%;
    height: 300px;
    object-fit: cover;
    border-radius: 16px;
    margin-bottom: 2rem;
    border: 1px solid var(--border);
}

.specs-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.spec-item {
    background: var(--glass);
    padding: 1.25rem;
    border-radius: 16px;
    border: 1px solid var(--border);
}

.spec-item label {
    display: block;
    color: var(--text-dim);
    font-size: 0.85rem;
    margin-bottom: 0.25rem;
}

.spec-item .value {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-main);
}

.description h3 {
    font-size: 1rem;
    margin-bottom: 0.75rem;
    color: var(--accent);
}

.description p {
    color: var(--text-dim);
    font-size: 0.95rem;
}

/* Form Styles */
.quote-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.input-group label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-dim);
}

input, textarea {
    background: #ffffff;
    border: 1px solid var(--border);
    padding: 0.8rem 1rem;
    border-radius: 12px;
    color: var(--text-main);
    font-family: inherit;
    transition: all 0.3s ease;
}

input:focus, textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1);
}

.divider {
    height: 1px;
    background: var(--border);
    margin: 0.5rem 0;
}

.pricing-inputs {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 1.5rem;
    background: rgba(37, 99, 235, 0.03);
    padding: 1.5rem;
    border-radius: 20px;
    border: 1px solid rgba(37, 99, 235, 0.1);
}

.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.prefix {
    position: absolute;
    left: 1rem;
    color: var(--accent);
    font-weight: 700;
}

.input-wrapper input {
    padding-left: 2rem;
    width: 100%;
    font-size: 1.25rem;
    font-weight: 700;
}

.total-display {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.price-container {
    display: flex;
    align-items: baseline;
    gap: 0.25rem;
    color: var(--accent);
}

.price-container .currency {
    font-size: 1.2rem;
    font-weight: 700;
}

.price-container .amount {
    font-size: 2.25rem;
    font-weight: 800;
    letter-spacing: -1px;
}

.calc-formula {
    font-size: 0.75rem;
    color: var(--text-dim);
}

.terms-check {
    display: flex;
    gap: 10px;
    font-size: 0.85rem;
    color: var(--text-dim);
    align-items: center;
}

.submit-btn {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    border: none;
    padding: 1.25rem;
    border-radius: 12px;
    font-weight: 700;
    font-size: 1.1rem;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    transition: transform 0.2s, box-shadow 0.2s;
    margin-top: 1rem;
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px -5px rgba(59, 130, 246, 0.4);
}

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

/* Footer */
.page-footer {
    text-align: center;
    margin-top: 4rem;
    color: var(--text-dim);
    font-size: 0.8rem;
    padding-bottom: 2rem;
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.4);
    backdrop-filter: blur(4px);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal-content {
    max-width: 450px;
    width: 90%;
    padding: 3rem;
    text-align: center;
}

.success-icon {
    width: 80px;
    height: 80px;
    background: var(--success);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    margin: 0 auto 1.5rem;
    box-shadow: 0 0 30px rgba(16, 185, 129, 0.3);
}

.close-btn {
    background: var(--primary);
    border: none;
    color: white;
    padding: 0.75rem 2rem;
    border-radius: 8px;
    margin-top: 2rem;
    cursor: pointer;
}

/* Responsive Improvements */
@media (max-width: 1024px) {
    .content-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .main-image {
        height: 250px;
    }
}

@media (max-width: 768px) {
    :root {
        --font-size-base: 14px;
    }
    
    body {
        font-size: var(--font-size-base);
    }

    .page-header {
        margin-bottom: 1.5rem;
        padding-bottom: 1rem;
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
    }

    .brand {
        gap: 0.5rem;
    }

    .logo-icon {
        width: 36px;
        height: 36px;
        font-size: 1.1rem;
        border-radius: 8px;
    }

    .logo-text h1 {
        font-size: 1.15rem;
        line-height: 1.2;
    }

    .logo-text span {
        display: none; /* 在手机端隐藏二级标题以节省空间 */
    }

    .auction-status {
        width: auto;
        gap: 0.75rem;
        padding: 0.4rem 0.8rem;
        font-size: 0.85rem;
        border-radius: 99px;
    }

    .status-indicator {
        font-size: 0.85rem;
    }

    .countdown .label {
        display: none; /* 在手机端隐藏“距离结束还剩”文字 */
    }

    .countdown .time {
        font-size: 1rem;
    }

    .card {
        padding: 1.5rem;
        border-radius: 20px;
    }

    .card-header h2 {
        font-size: 1.5rem;
    }

    .specs-grid {
        grid-template-columns: 1fr 1fr;
        gap: 1rem;
    }

    .spec-item {
        padding: 1rem;
    }

    .spec-item .value {
        font-size: 1.1rem;
    }

    .pricing-inputs {
        grid-template-columns: 1fr;
        padding: 1.25rem;
        gap: 1.25rem;
    }

    .price-container .amount {
        font-size: 1.8rem;
    }

    .submit-btn {
        padding: 1rem;
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    .specs-grid {
        grid-template-columns: 1fr;
    }
    
    .row {
        grid-template-columns: 1fr;
    }
}