/* ===========================================================
   产品详情页样式（resources/newpage/product-detail.html）
   依赖 home.css 的 Design Tokens / header / footer / container
   模板结构：
     - crumbs-bar（面包屑 + 商品编号）
     - detail（左大图 gallery + 右信息卡 info-card）
     - tabs-bar（sticky 顶部 · tab 切换）
     - tab-panel（产品介绍 / 规格参数 / 应用案例 / 订购须知）
     - related（相关产品推荐 · 4 列）
     - inquiry-section（左联系方式 + 右询价表单）
   =========================================================== */

/* ============== 面包屑（轻量 hero）============== */
.crumbs-bar {
    background: var(--c-surface);
    border-bottom: 1px solid var(--c-line);
}
.crumbs-bar-inner {
    padding: 14px 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
}
.crumbs-bar .crumbs {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 13px;
    color: var(--c-ink-3);
}
.crumbs-bar .crumbs a { color: var(--c-ink-3); text-decoration: none; }
.crumbs-bar .crumbs a:hover { color: var(--c-brand); }
.crumbs-bar .crumbs .sep { color: var(--c-ink-4); }
.crumbs-bar .crumbs .current { color: var(--c-ink); font-weight: 500; }

/* ============== 主区：左大图 + 右信息卡 ============== */
.detail { padding: 36px 0 24px; }
.detail-grid {
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: 40px;
    align-items: flex-start;
}

/* 左：图片区 */
.gallery { display: flex; flex-direction: column; gap: 12px; }
.gallery-main {
    background: var(--c-surface);
    border: 1px solid var(--c-line);
    border-radius: var(--r-lg);
    aspect-ratio: 1/1;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    position: relative;
}
.gallery-main img {
    width: 84%;
    height: 84%;
    object-fit: contain;
    filter: drop-shadow(0 18px 36px rgba(15, 23, 42, .16));
}
.gallery-main .pill {
    position: absolute;
    top: 16px;
    left: 16px;
    padding: 6px 12px;
    border-radius: 999px;
    background: rgba(11, 37, 69, .85);
    color: #fff;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: .04em;
}
.gallery-main .zoom-hint {
    position: absolute;
    bottom: 16px;
    right: 16px;
    padding: 6px 10px;
    border-radius: 6px;
    background: rgba(15, 23, 42, .6);
    color: rgba(255, 255, 255, .85);
    font-size: 11px;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}
.gallery-thumbs {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
}
.gallery-thumbs button {
    aspect-ratio: 1/1;
    background: var(--c-surface);
    border: 1px solid var(--c-line);
    border-radius: var(--r-md);
    padding: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: border-color .18s ease, transform .18s ease;
    cursor: pointer;
}
.gallery-thumbs button:hover { border-color: var(--c-brand); transform: translateY(-1px); }
.gallery-thumbs button.is-active {
    border-color: var(--c-brand);
    box-shadow: 0 0 0 2px rgba(11, 37, 69, .12);
}
.gallery-thumbs img { width: 100%; height: 100%; object-fit: contain; }

/* 右：信息卡 */
.info-card { padding: 4px 0; }
.info-card .cat-row {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 14px;
}
.info-card .cat-row .tag {
    padding: 4px 10px;
    border-radius: 4px;
    background: rgba(242, 92, 42, .10);
    color: var(--c-accent);
    font-size: 12px;
    font-weight: 600;
    letter-spacing: .04em;
}
.info-card .cat-row .id-pill {
    padding: 4px 10px;
    border-radius: 4px;
    background: var(--c-surface-2);
    color: var(--c-ink-3);
    font-size: 12px;
    font-feature-settings: "tnum";
}
.info-card h1 {
    font-size: 30px;
    font-weight: 700;
    color: var(--c-ink);
    line-height: 1.3;
    margin: 0 0 6px;
    letter-spacing: -.01em;
}
.info-card .en {
    font-size: 14px;
    color: var(--c-ink-3);
    letter-spacing: .04em;
    margin-bottom: 14px;
}
.info-card .summary {
    font-size: 14px;
    color: var(--c-ink-2);
    line-height: 1.75;
    margin: 0 0 22px;
    padding: 14px 16px;
    border-left: 3px solid var(--c-accent);
    background: linear-gradient(90deg, rgba(242, 92, 42, .06) 0%, rgba(242, 92, 42, 0) 80%);
    border-radius: 0 var(--r-md) var(--r-md) 0;
}
.info-card .quick-specs {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    margin-bottom: 24px;
}
.info-card .quick-specs div {
    background: var(--c-surface-2);
    border: 1px solid var(--c-line);
    padding: 12px 14px;
    border-radius: var(--r-md);
}
.info-card .quick-specs div .k {
    font-size: 11px;
    color: var(--c-ink-3);
    letter-spacing: .04em;
    margin-bottom: 4px;
}
.info-card .quick-specs div .v {
    font-size: 14px;
    color: var(--c-ink);
    font-weight: 600;
    font-feature-settings: "tnum";
}
.info-card .cta-row {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 18px;
}
.info-card .btn-warm {
    flex: 1;
    min-width: 160px;
    height: 48px;
    background: var(--c-accent);
    color: #fff;
    border-radius: var(--r-md);
    font-size: 15px;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: background .18s ease;
    border: none;
    cursor: pointer;
    text-decoration: none;
}
.info-card .btn-warm:hover { background: #DC4A1A; }
.info-card .btn-line {
    flex: 1;
    min-width: 140px;
    height: 48px;
    background: transparent;
    color: var(--c-brand);
    border-radius: var(--r-md);
    font-size: 15px;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border: 1px solid var(--c-line);
    transition: background .18s ease, border-color .18s ease;
    text-decoration: none;
    cursor: pointer;
}
.info-card .btn-line:hover { background: var(--c-surface-2); border-color: var(--c-brand); }
.info-card .assurance {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    padding-top: 16px;
    border-top: 1px dashed var(--c-line);
}
.info-card .assurance div {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    color: var(--c-ink-3);
}
.info-card .assurance div svg {
    width: 14px;
    height: 14px;
    color: var(--c-success);
}

/* ============== Tab 区域 ============== */
.tabs-bar {
    background: var(--c-surface);
    border-bottom: 1px solid var(--c-line);
    position: sticky;
    top: 76px;
    z-index: 15;
}
.tabs-inner {
    display: flex;
    gap: 0;
    align-items: center;
    overflow-x: auto;
}
.tab-btn {
    padding: 18px 22px;
    font-size: 14px;
    color: var(--c-ink-2);
    position: relative;
    white-space: nowrap;
    transition: color .18s ease;
    background: none;
    border: none;
    cursor: pointer;
}
.tab-btn:hover { color: var(--c-brand); }
.tab-btn.is-active { color: var(--c-brand); font-weight: 600; }
.tab-btn.is-active::after {
    content: '';
    position: absolute;
    left: 22px;
    right: 22px;
    bottom: 0;
    height: 3px;
    background: var(--c-accent);
    border-radius: 3px 3px 0 0;
}

.tab-panel { display: none; padding: 56px 0 80px; }
.tab-panel.is-active { display: block; }

/* 规格参数表 */
.spec-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
    background: var(--c-surface);
    border: 1px solid var(--c-line);
    border-radius: var(--r-lg);
    overflow: hidden;
}
.spec-grid > div {
    display: grid;
    grid-template-columns: 130px 1fr;
    border-bottom: 1px solid var(--c-line);
}
.spec-grid > div:nth-last-child(-n+2) { border-bottom: 0; }
.spec-grid > div:nth-child(odd) { border-right: 1px solid var(--c-line); }
.spec-grid > div .k {
    padding: 14px 18px;
    background: var(--c-surface-2);
    font-size: 13px;
    color: var(--c-ink-3);
    font-weight: 500;
    border-right: 1px solid var(--c-line);
}
.spec-grid > div .v {
    padding: 14px 18px;
    font-size: 14px;
    color: var(--c-ink);
    font-weight: 500;
    font-feature-settings: "tnum";
}

/* 产品介绍正文 */
.prose {
    max-width: 860px;
    margin: 0 auto;
    background: var(--c-surface);
    border: 1px solid var(--c-line);
    border-radius: var(--r-lg);
    padding: 36px 44px;
    font-size: 15px;
    line-height: 1.85;
    color: var(--c-ink-2);
}
.prose h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--c-ink);
    margin: 0 0 12px;
}
.prose h3:not(:first-child) { margin-top: 28px; }
.prose ul { padding-left: 22px; margin: 0 0 16px; }
.prose li { margin-bottom: 6px; }
.prose img { max-width: 100%; height: auto; border-radius: var(--r-md); margin: 12px 0; }
.prose p { margin: 0 0 14px; }
.prose table {
    width: 100%;
    border-collapse: collapse;
    margin: 16px 0;
    font-size: 14px;
}
.prose table th,
.prose table td {
    border: 1px solid var(--c-line);
    padding: 10px 14px;
    text-align: left;
}
.prose table th { background: var(--c-surface-2); font-weight: 600; }

/* 应用案例卡片 */
.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.case-card {
    background: var(--c-surface);
    border: 1px solid var(--c-line);
    border-radius: var(--r-lg);
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    transition: transform .2s ease, box-shadow .2s ease;
}
.case-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.case-card .ic {
    width: 44px;
    height: 44px;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--c-brand) 0%, var(--c-brand-2) 100%);
    color: #fff;
    display: grid;
    place-items: center;
}
.case-card .ic svg { width: 22px; height: 22px; }
.case-card h4 {
    font-size: 16px;
    font-weight: 700;
    color: var(--c-ink);
    margin: 4px 0 0;
}
.case-card .meta { font-size: 12px; color: var(--c-ink-3); }
.case-card p {
    font-size: 13px;
    color: var(--c-ink-2);
    line-height: 1.7;
    margin: 0;
}

/* 订购须知 */
.notice-list { display: flex; flex-direction: column; gap: 12px; }
.notice-item {
    background: var(--c-surface);
    border: 1px solid var(--c-line);
    border-radius: var(--r-md);
    padding: 18px 22px;
    display: grid;
    grid-template-columns: 36px 1fr;
    gap: 14px;
    align-items: flex-start;
}
.notice-item .n {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--c-brand);
    color: #fff;
    display: grid;
    place-items: center;
    font-size: 14px;
    font-weight: 700;
}
.notice-item h5 {
    font-size: 15px;
    font-weight: 700;
    color: var(--c-ink);
    margin: 0 0 6px;
}
.notice-item p {
    font-size: 13px;
    color: var(--c-ink-2);
    line-height: 1.7;
    margin: 0;
}

/* ============== 相关产品推荐 ============== */
.related {
    padding: 80px 0;
    background: var(--c-surface-2);
    border-top: 1px solid var(--c-line);
}
.related-head {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    margin-bottom: 28px;
    gap: 16px;
}
.related-head h2 {
    font-size: 26px;
    font-weight: 700;
    color: var(--c-ink);
    margin: 0;
    letter-spacing: -.01em;
}
.related-head h2 .accent { color: var(--c-accent); }
.related-head .sub {
    font-size: 13px;
    color: var(--c-ink-3);
    margin-top: 6px;
}
.related-head .more-btn {
    font-size: 14px;
    color: var(--c-brand);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    text-decoration: none;
}
.related-head .more-btn:hover { color: var(--c-accent); }
.related-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 18px;
}
.r-card {
    background: var(--c-surface);
    border: 1px solid var(--c-line);
    border-radius: var(--r-lg);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: transform .2s ease, box-shadow .2s ease;
    text-decoration: none;
    color: inherit;
}
.r-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.r-cover {
    aspect-ratio: 1/1;
    background: linear-gradient(135deg, #F1F5F9 0%, #E2E8F0 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 18px;
}
.r-cover img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    filter: drop-shadow(0 4px 8px rgba(15, 23, 42, .08));
}
.r-body { padding: 14px 16px 16px; }
.r-body h4 {
    font-size: 14px;
    font-weight: 600;
    color: var(--c-ink);
    margin: 0 0 4px;
    line-height: 1.4;
}
.r-body .id {
    font-size: 12px;
    color: var(--c-ink-3);
    font-feature-settings: "tnum";
}

/* ============== 询价表单 ============== */
.inquiry-section { padding: 80px 0; }
.inquiry-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: stretch;
}
.inquiry-info { padding: 12px 0; }
.inquiry-info .sec-title {
    font-size: 12px;
    font-weight: 700;
    letter-spacing: .18em;
    color: var(--c-accent);
    text-transform: uppercase;
}
.inquiry-info h2 {
    font-size: 32px;
    font-weight: 700;
    color: var(--c-ink);
    margin: 10px 0 14px;
    line-height: 1.3;
}
.inquiry-info h2 .accent { color: var(--c-accent); }
.inquiry-info > p {
    font-size: 15px;
    color: var(--c-ink-2);
    margin: 0 0 28px;
    line-height: 1.75;
}
.inquiry-list { display: grid; gap: 16px; }
.inquiry-row {
    display: flex;
    gap: 14px;
    padding: 16px;
    border: 1px solid var(--c-line);
    border-radius: var(--r-md);
    background: var(--c-surface);
}
.inquiry-row .ic {
    width: 38px;
    height: 38px;
    border-radius: 8px;
    flex-shrink: 0;
    background: linear-gradient(135deg, var(--c-brand) 0%, var(--c-brand-2) 100%);
    color: #fff;
    display: grid;
    place-items: center;
}
.inquiry-row .ic svg { width: 18px; height: 18px; }
.inquiry-row .k { font-size: 12px; color: var(--c-ink-3); }
.inquiry-row .v {
    font-size: 15px;
    color: var(--c-ink);
    font-weight: 600;
    margin-top: 2px;
}
.inquiry-row .v-sub {
    font-size: 12px;
    color: var(--c-ink-3);
    margin-top: 4px;
}

.inquiry-form {
    padding: 32px;
    border-radius: var(--r-lg);
    background: linear-gradient(160deg, #F8FAFC 0%, #EFF6FF 100%);
    border: 1px solid var(--c-line);
}
.inquiry-form h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--c-ink);
    margin: 0 0 4px;
}
.inquiry-form .sub {
    font-size: 13px;
    color: var(--c-ink-3);
    margin: 0 0 22px;
}
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 12px;
}
.form-field { display: flex; flex-direction: column; }
.form-field.full { grid-column: 1 / -1; }
.form-label {
    font-size: 12px;
    color: var(--c-ink-2);
    margin-bottom: 6px;
    font-weight: 500;
}
.form-input,
.form-select,
.form-textarea {
    width: 100%;
    height: 40px;
    padding: 0 12px;
    border: 1px solid var(--c-line);
    border-radius: 6px;
    background: #fff;
    font-size: 13px;
    color: var(--c-ink);
    font-family: inherit;
    transition: border-color .18s ease, box-shadow .18s ease;
}
.form-textarea {
    height: 110px;
    padding: 10px 12px;
    resize: vertical;
    line-height: 1.55;
}
.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--c-brand);
    box-shadow: 0 0 0 3px rgba(11, 37, 69, .08);
}
.form-submit {
    margin-top: 14px;
    width: 100%;
    height: 46px;
    background: var(--c-accent);
    color: #fff;
    border-radius: var(--r-md);
    font-size: 15px;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: background .18s ease;
    border: none;
    cursor: pointer;
}
.form-submit:hover { background: #DC4A1A; }
.form-submit:disabled { background: #94A3B8; cursor: not-allowed; }
.form-hint {
    font-size: 11px;
    color: var(--c-ink-3);
    margin-top: 10px;
    text-align: center;
}
.form-success {
    background: var(--c-success);
    color: #fff;
    padding: 12px 16px;
    border-radius: 6px;
    margin-top: 12px;
    font-size: 13px;
    display: none;
}
.form-success.is-show { display: block; }

/* ============== 响应式 ============== */
@media (max-width: 1100px) {
    .detail-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
    .case-grid { grid-template-columns: repeat(2, 1fr); }
    .related-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 760px) {
    .header-inner { height: 64px; gap: 12px; }
    .brand-en { display: none; }
    .nav { display: none; }
    .header-actions .icon-btn { display: none; }
    .header-actions .btn-primary { padding: 0 12px; height: 36px; font-size: 13px; }

    .detail { padding: 24px 0; }
    .detail-grid { grid-template-columns: 1fr; gap: 24px; }
    .gallery-thumbs { grid-template-columns: repeat(4, 1fr); }
    .info-card h1 { font-size: 24px; }
    .info-card .quick-specs { grid-template-columns: repeat(2, 1fr); }
    .tabs-bar { top: 64px; }
    .tab-btn { padding: 14px 16px; font-size: 13px; }
    .prose { padding: 24px 18px; }
    .spec-grid { grid-template-columns: 1fr; }
    .spec-grid > div:nth-child(odd) { border-right: 0; }
    .case-grid { grid-template-columns: 1fr; }
    .related-grid { grid-template-columns: repeat(2, 1fr); }
    .inquiry-grid { grid-template-columns: 1fr; gap: 24px; }
    .form-row { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: 32px; }
    .footer-bottom { flex-direction: column; gap: 12px; align-items: flex-start; }
}