/**
 * 科研私有 AI 大模型机 · 产品介绍页（助研统一风格）
 */
body.aibox-page {
    background: var(--bg-primary);
    min-height: 100vh;
}

/* 导航 — 与首页一致 */
.aibox-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 64px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 24px;
    padding: 0 40px;
    z-index: 1000;
    transition: box-shadow 0.3s ease;
}

.aibox-nav.scrolled {
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
}

.aibox-nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}

.aibox-nav-logo .logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    flex-shrink: 0;
}

.aibox-nav-logo .logo-icon svg {
    width: 24px;
    height: 24px;
    display: block;
}

.aibox-nav-logo .logo-text {
    font-size: 1.25rem;
    font-weight: 700;
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.aibox-nav-menu {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 28px;
}

.aibox-nav-menu a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 15px;
    font-weight: 500;
    transition: color 0.2s ease;
}

.aibox-nav-menu a:hover,
.aibox-nav-menu a.active {
    color: #6366f1;
}

.aibox-nav-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.aibox-nav-right {
    display: flex;
    align-items: center;
    gap: 8px;
    justify-self: end;
}

.aibox-nav-toggle {
    display: none;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    padding: 0;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: #fff;
    color: var(--text-primary);
    cursor: pointer;
}

.aibox-nav-toggle svg {
    width: 20px;
    height: 20px;
}

.aibox-nav-sibling {
    color: #6366f1 !important;
    font-weight: 600 !important;
}

body.aibox-guochan-page .aibox-nav-sibling {
    color: #dc2626 !important;
}

.aibox-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 22px;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 500;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.aibox-btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.aibox-btn-outline:hover {
    border-color: #6366f1;
    color: #6366f1;
}

.aibox-btn-primary {
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    color: #fff;
}

.aibox-btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
}

.aibox-btn-lg {
    padding: 14px 32px;
    font-size: 16px;
    font-weight: 600;
    border-radius: 10px;
}

.aibox-btn-block {
    width: 100%;
}

/* 布局 */
.aibox-wrap {
    max-width: 1120px;
    margin: 0 auto;
    padding: 0 40px;
}

.aibox-section {
    padding: 72px 0;
}

.aibox-section.alt {
    background: #fff;
}

.aibox-section-header {
    text-align: center;
    margin-bottom: 48px;
}

.aibox-section-tag {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(99, 102, 241, 0.1);
    border-radius: 50px;
    color: #6366f1;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.5px;
    margin-bottom: 16px;
}

.aibox-section-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 12px;
}

.aibox-section-desc {
    font-size: 1.0625rem;
    color: var(--text-secondary);
    max-width: 640px;
    margin: 0 auto;
    line-height: 1.7;
}

/* Hero */
.aibox-hero {
    padding: 120px 0 80px;
    background: linear-gradient(180deg, #f8fafc 0%, #fff 100%);
    position: relative;
    overflow: hidden;
}

.aibox-hero::before {
    content: '';
    position: absolute;
    top: -40%;
    right: -15%;
    width: 70%;
    height: 140%;
    background: radial-gradient(ellipse at center, rgba(99, 102, 241, 0.08) 0%, transparent 70%);
    pointer-events: none;
}

.aibox-hero-grid {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
}

.aibox-hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: rgba(99, 102, 241, 0.1);
    border-radius: 50px;
    color: #6366f1;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 20px;
}

.aibox-hero-badge svg {
    width: 16px;
    height: 16px;
}

.aibox-hero h1 {
    font-size: clamp(2rem, 4vw, 2.75rem);
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.25;
    margin: 0 0 20px;
}

.aibox-hero-lead {
    font-size: 1.125rem;
    color: var(--text-secondary);
    line-height: 1.75;
    margin: 0 0 28px;
}

.aibox-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 24px;
}

.aibox-tag {
    padding: 6px 14px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 999px;
    font-size: 13px;
    color: var(--text-secondary);
}

.aibox-product-frame {
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 24px;
    box-shadow: 0 12px 40px rgba(99, 102, 241, 0.08);
}

.aibox-product-frame img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 12px;
}

.aibox-product-caption {
    margin-top: 14px;
    text-align: center;
    font-size: 14px;
    color: var(--text-secondary);
}

/* 三列卡片 */
.aibox-cards-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.aibox-card {
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 28px 24px;
    transition: all 0.25s ease;
}

.aibox-section.alt .aibox-card {
    background: var(--bg-primary);
}

.aibox-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.06);
    border-color: rgba(99, 102, 241, 0.25);
}

.aibox-card-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.12) 0%, rgba(139, 92, 246, 0.12) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 18px;
    font-size: 22px;
}

.aibox-card h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 10px;
}

.aibox-card p {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.65;
    margin: 0;
}

/* 提示条 */
.aibox-notice {
    margin-top: 32px;
    padding: 20px 24px;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.06) 0%, rgba(139, 92, 246, 0.06) 100%);
    border: 1px solid rgba(99, 102, 241, 0.15);
    border-radius: 14px;
    color: var(--text-primary);
    font-size: 0.9375rem;
    line-height: 1.7;
}

.aibox-notice strong {
    color: #6366f1;
}

/* 交付步骤 */
.aibox-steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.aibox-step {
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 28px 24px;
    position: relative;
}

.aibox-step-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 10px;
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    color: #fff;
    font-weight: 700;
    font-size: 15px;
    margin-bottom: 16px;
}

.aibox-step h3 {
    font-size: 1.0625rem;
    font-weight: 600;
    margin: 0 0 10px;
    color: var(--text-primary);
}

.aibox-step p {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.65;
    margin: 0;
}

/* 产品规格 */
.aibox-specs-layout {
    display: grid;
    grid-template-columns: minmax(0, 280px) minmax(0, 1fr);
    gap: 28px;
    align-items: start;
}

.aibox-specs-highlights {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
}

.aibox-spec-highlight {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.08) 0%, rgba(139, 92, 246, 0.08) 100%);
    border: 1px solid rgba(99, 102, 241, 0.15);
    border-radius: 14px;
    padding: 20px 16px;
    text-align: center;
}

.aibox-spec-highlight strong {
    display: block;
    font-size: 1.375rem;
    font-weight: 700;
    color: #6366f1;
    line-height: 1.2;
    margin-bottom: 6px;
}

.aibox-spec-highlight span {
    display: block;
    font-size: 0.8125rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

.aibox-specs-table-wrap {
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 8px 24px 20px;
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.04);
}

.aibox-specs-table {
    width: 100%;
    border-collapse: collapse;
}

.aibox-specs-table th,
.aibox-specs-table td {
    padding: 14px 0;
    border-bottom: 1px solid var(--border-color);
    text-align: left;
    vertical-align: top;
    line-height: 1.6;
}

.aibox-specs-table tr:last-child th,
.aibox-specs-table tr:last-child td {
    border-bottom: none;
}

.aibox-specs-table th {
    width: 112px;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-muted);
    padding-right: 20px;
    white-space: nowrap;
}

.aibox-specs-table td {
    font-size: 0.9375rem;
    color: var(--text-primary);
}

.aibox-specs-note {
    margin: 16px 0 0;
    padding-top: 16px;
    border-top: 1px dashed var(--border-color);
    font-size: 0.8125rem;
    color: var(--text-muted);
    line-height: 1.65;
}

/* 购买区 */
.aibox-purchase-wrap {
    max-width: 480px;
    margin: 0 auto;
    text-align: center;
}

.aibox-buy-card-solo {
    position: static;
    text-align: center;
    padding: 36px 32px 28px;
}

.aibox-buy-card-solo .aibox-price {
    margin-bottom: 8px;
}

.aibox-buy-card-solo .aibox-price-note {
    margin-bottom: 28px;
}

.aibox-buy-footnote {
    margin: 20px 0 0;
    font-size: 14px;
    color: var(--text-secondary);
}

.aibox-buy-footnote a {
    color: #6366f1;
    text-decoration: none;
}

.aibox-buy-footnote a:hover {
    text-decoration: underline;
}

.aibox-buy-card {
    position: sticky;
    top: 88px;
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 32px 28px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.06);
}

.aibox-price {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1;
    margin-bottom: 6px;
}

.aibox-price span {
    font-size: 1.25rem;
    font-weight: 600;
    vertical-align: super;
    margin-right: 2px;
}

.aibox-price-note {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.aibox-buy-actions {
    display: grid;
    gap: 12px;
}

.aibox-channel-field {
    margin-bottom: 20px;
    text-align: left;
}

.aibox-channel-field label {
    display: block;
    margin-bottom: 8px;
    font-size: 0.9375rem;
    color: var(--text-secondary);
}

.aibox-channel-optional {
    color: var(--text-muted);
    font-weight: 400;
}

.aibox-channel-field input {
    width: 100%;
    box-sizing: border-box;
    padding: 12px 14px;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 0.9375rem;
}

.aibox-channel-field input:focus {
    outline: none;
    border-color: #6366f1;
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.12);
}

/* 页脚 */
.aibox-footer {
    padding: 32px 40px;
    text-align: center;
    color: var(--text-secondary);
    font-size: 14px;
    border-top: 1px solid var(--border-color);
}

.aibox-footer a {
    color: #6366f1;
    text-decoration: none;
}

.aibox-footer a:hover {
    text-decoration: underline;
}

@media (max-width: 1100px) and (min-width: 961px) {
    .aibox-nav-menu {
        gap: 16px;
    }

    .aibox-nav-menu a {
        font-size: 14px;
    }
}

@media (max-width: 960px) {
    .aibox-nav {
        padding: 0 16px;
        grid-template-columns: 1fr auto;
    }

    .aibox-nav-toggle {
        display: inline-flex;
    }

    .aibox-nav-menu {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        background: rgba(255, 255, 255, 0.98);
        border-bottom: 1px solid var(--border-color);
        box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
        padding: 12px 16px 16px;
        z-index: 999;
    }

    .aibox-nav-menu.is-open {
        display: flex;
    }

    .aibox-nav-menu a {
        display: block;
        padding: 12px 14px;
        border-radius: 8px;
        font-size: 15px;
    }

    .aibox-nav-menu a:hover {
        background: rgba(99, 102, 241, 0.06);
    }

    body.aibox-guochan-page .aibox-nav-menu a:hover {
        background: rgba(220, 38, 38, 0.06);
    }

    .aibox-nav-menu-divider {
        height: 1px;
        background: var(--border-color);
        margin: 8px 0;
    }

    .aibox-nav-menu-extra {
        display: block;
    }

    .aibox-nav-actions .aibox-btn-outline {
        display: none;
    }

    .aibox-wrap {
        padding: 0 20px;
    }

    .aibox-cards-3,
    .aibox-steps {
        grid-template-columns: 1fr;
    }

    .aibox-specs-layout {
        grid-template-columns: 1fr;
    }

    .aibox-specs-table th {
        width: 88px;
        white-space: normal;
    }

    .aibox-section {
        padding: 56px 0;
    }

    .aibox-hero {
        padding-top: 100px;
    }

    .aibox-hero-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .aibox-hero h1 {
        font-size: 1.75rem;
    }

    .aibox-hero-lead {
        font-size: 1rem;
    }

    .aibox-product-frame {
        max-width: 420px;
        margin: 0 auto;
    }

    .aibox-nav-actions {
        flex-wrap: nowrap;
        justify-content: flex-end;
        gap: 8px;
    }

    .aibox-nav-actions .aibox-btn {
        padding: 8px 14px;
        font-size: 14px;
    }

    .aibox-btn-lg {
        padding: 12px 24px;
        font-size: 15px;
    }

    .aibox-section-title {
        font-size: 1.5rem;
    }
}

@media (min-width: 961px) {
    .aibox-nav-menu-extra {
        display: none;
    }
}
body.aibox-guochan-page .aibox-hero-badge,
body.aibox-guochan-page .aibox-section-tag {
    background: rgba(220, 38, 38, 0.08);
    color: #dc2626;
}

body.aibox-guochan-page .aibox-notice {
    background: linear-gradient(135deg, rgba(220, 38, 38, 0.05) 0%, rgba(234, 88, 12, 0.05) 100%);
    border-color: rgba(220, 38, 38, 0.15);
}

body.aibox-guochan-page .aibox-notice strong {
    color: #dc2626;
}

body.aibox-guochan-page .aibox-step-num {
    background: linear-gradient(135deg, #dc2626 0%, #ea580c 100%);
}

body.aibox-guochan-page .aibox-guochan-subtitle {
    font-size: 0.72em;
    font-weight: 600;
    color: #dc2626;
}