/* ==========================================================================
   pages.css — 各页面专属布局
   ========================================================================== */

/* ================= 首页 ================= */

/* 数据条 */
.stats-bar {
  position: relative; z-index: 5; margin-top: -62px;
  background: linear-gradient(135deg, #12345C 0%, #0B1B33 100%);
  border-radius: var(--radius-lg);
  box-shadow: 0 24px 60px rgba(6, 16, 32, 0.35);
  overflow: hidden;
}
.stats-bar::before {
  content: ''; position: absolute; inset: 0;
  background-image: linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 44px 100%;
}
.stats-bar__grid { position: relative; display: grid; grid-template-columns: repeat(4, 1fr); }
.stat {
  padding: 40px 28px; text-align: center; position: relative;
}
.stat + .stat::before {
  content: ''; position: absolute; left: 0; top: 26%; bottom: 26%;
  width: 1px; background: rgba(255, 255, 255, 0.12);
}
.stat__value {
  font-size: 44px; font-weight: 700; line-height: 1;
  background: linear-gradient(180deg, #FFFFFF 0%, #FFC79A 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.stat__value sup { font-size: 22px; margin-left: 3px; color: var(--c-orange-light); -webkit-text-fill-color: var(--c-orange-light); }
.stat__label { margin-top: 12px; font-size: 14px; color: #9DB0C7; letter-spacing: 1px; }

/* 简介两栏 */
.about-split { display: grid; grid-template-columns: 1fr 1fr; gap: 72px; align-items: center; }
.about-split__media { position: relative; }
.about-split__media img {
  width: 100%; border-radius: var(--radius-lg); box-shadow: var(--sh-lg);
  aspect-ratio: 4 / 3; object-fit: cover;
}
.about-split__media::after {
  content: ''; position: absolute; right: -22px; bottom: -22px; width: 62%; height: 62%;
  border: 3px solid var(--c-orange); border-radius: var(--radius-lg); z-index: -1;
}
.about-split__badge {
  position: absolute; left: -26px; bottom: 34px;
  background: var(--grad-orange); color: #fff;
  padding: 20px 26px; border-radius: var(--radius);
  box-shadow: var(--sh-orange);
}
.about-split__badge b { display: block; font-size: 30px; line-height: 1.1; }
.about-split__badge span { font-size: 13px; opacity: 0.92; }
.about-split__text p + p { margin-top: 16px; }
.about-split__list { margin-top: 26px; display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.about-split__list li { display: flex; align-items: center; gap: 10px; font-size: 14.5px; color: var(--t-strong); }
.about-split__list svg { width: 19px; height: 19px; color: var(--c-orange); flex: none; }

/* 分类卡片 */
.category-card { position: relative; display: block; border-radius: var(--radius-lg); overflow: hidden; }
.category-card .media::before { padding-top: 68%; }
.category-card__overlay {
  position: absolute; inset: 0;
  background: linear-gradient(0deg, rgba(5, 11, 22, 0.94) 6%, rgba(5, 11, 22, 0.35) 55%, transparent 100%);
}
.category-card__body { position: absolute; inset: auto 0 0 0; padding: 26px 26px 24px; z-index: 2; }
.category-card__count {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 12px; border-radius: var(--radius-pill);
  background: rgba(255, 107, 26, 0.2); border: 1px solid rgba(255, 107, 26, 0.42);
  color: var(--c-orange-light); font-size: 12px; font-weight: 600;
}
.category-card__title { margin-top: 12px; font-size: 22px; color: #fff; }
.category-card__desc {
  margin-top: 9px; font-size: 13.5px; color: #A9BBD0; line-height: 1.7;
  display: -webkit-box; -webkit-line-clamp: 2; line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.category-card__arrow {
  position: absolute; right: 24px; bottom: 26px;
  width: 40px; height: 40px; border-radius: 50%;
  background: rgba(255, 255, 255, 0.12); border: 1px solid rgba(255, 255, 255, 0.22);
  display: grid; place-items: center; color: #fff;
  transition: all var(--dur) var(--ease);
}
.category-card:hover .category-card__arrow { background: var(--c-orange); border-color: var(--c-orange); transform: translateX(5px); }
.category-card__arrow svg { width: 18px; height: 18px; }

/* 优势 */
.advantage {
  padding: 34px 28px; border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.045); border: 1px solid rgba(255, 255, 255, 0.08);
  transition: all var(--dur) var(--ease);
}
.advantage:hover {
  transform: translateY(-6px);
  background: rgba(255, 107, 26, 0.09); border-color: rgba(255, 107, 26, 0.32);
}
.advantage__icon {
  width: 56px; height: 56px; border-radius: 15px;
  display: grid; place-items: center;
  background: rgba(255, 107, 26, 0.14); color: var(--c-orange-light);
  transition: all var(--dur) var(--ease);
}
.advantage:hover .advantage__icon { background: var(--grad-orange); color: #fff; }
.advantage__icon svg { width: 27px; height: 27px; }
.advantage__title { margin-top: 22px; font-size: 18px; color: #fff; }
.advantage__desc { margin-top: 11px; font-size: 14px; color: #9DB0C7; line-height: 1.85; }

/* 工艺流程 */
.process {
  --row-h: 180px;                  /* 单行高度，用于精确计算 U 形回转连接器 */
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 50px 16px;
  position: relative;
}
.process-step { position: relative; text-align: center; min-height: var(--row-h); }
.process-step__num {
  width: 68px; height: 68px; margin: 0 auto; border-radius: 50%;
  display: grid; place-items: center;
  background: var(--bg-card); border: 2px solid var(--bg-soft);
  font-size: 19px; font-weight: 700; color: var(--c-orange);
  box-shadow: var(--sh-sm);
  transition: all var(--dur) var(--ease);
  position: relative;
  z-index: 1;
}
.process-step:hover .process-step__num {
  background: var(--grad-orange); color: #fff; border-color: transparent;
  box-shadow: var(--sh-orange); transform: translateY(-4px);
}
.process-step__title { margin-top: 18px; font-size: 16px; }
.process-step__desc { margin-top: 8px; font-size: 13.5px; color: var(--t-muted); line-height: 1.7; }

/* 横向虚线连接器：当前编号圆 → 下一编号圆（同一行） */
.process-step::after {
  content: '';
  position: absolute;
  top: 34px;                 /* 68px 编号圆的垂直中线 */
  left: 50%;
  width: calc(100% + 16px);   /* 半列 + 列间距 + 半列 = 到达下一编号圆心 */
  border-top: 2px dashed rgba(255, 107, 26, 0.3);
  pointer-events: none;
  z-index: 0;
}
.process-step:last-child::after,
.process-step:nth-child(4n)::after { display: none; }
/* 换行 U 形回转（沿列外侧绕行，不穿过编号圆下方的文字）：
   04 → 向右延展 → 向下 → 折回正下方的 05；
   08 → 向左延展 → 向下 → 折回正下方的 09。
   线段起止于编号圆圆心，被圆形背景遮挡，视觉上为圆边到圆边 */
.process-step[data-step="04"]::before {
  content: '';
  position: absolute;
  top: 34px;                              /* 起于 04 编号圆圆心 */
  left: 50%;                              /* 自圆心向右水平延展 */
  right: -20px;                           /* 漂出网格右缘 20px */
  height: calc(var(--row-h) + 50px);      /* 向下抵达下一行编号圆圆心 */
  border-top: 2px dashed rgba(255, 107, 26, 0.45);
  border-right: 2px dashed rgba(255, 107, 26, 0.45);
  border-bottom: 2px dashed rgba(255, 107, 26, 0.45);
  pointer-events: none;
  z-index: 0;
}
.process-step[data-step="08"]::before {
  content: '';
  position: absolute;
  top: 34px;                              /* 起于 08 编号圆圆心 */
  left: -20px;                            /* 漂出网格左缘 20px */
  right: 50%;                             /* 自圆心向左水平延展 */
  height: calc(var(--row-h) + 50px);      /* 向下抵达下一行编号圆圆心 */
  border-top: 2px dashed rgba(255, 107, 26, 0.45);
  border-left: 2px dashed rgba(255, 107, 26, 0.45);
  border-bottom: 2px dashed rgba(255, 107, 26, 0.45);
  pointer-events: none;
  z-index: 0;
}

/* CTA */
.cta-banner {
  position: relative; overflow: hidden;
  background: linear-gradient(120deg, #FF6B1A 0%, #E03B3B 100%);
  border-radius: var(--radius-lg);
  padding: 62px 48px; text-align: center;
}
.cta-banner::before, .cta-banner::after {
  content: ''; position: absolute; border-radius: 50%; border: 2px solid rgba(255, 255, 255, 0.14);
}
.cta-banner::before { width: 320px; height: 320px; left: -110px; top: -110px; }
.cta-banner::after { width: 240px; height: 240px; right: -70px; bottom: -90px; }
.cta-banner__title { position: relative; font-size: 34px; color: #fff; }
.cta-banner__desc { position: relative; margin-top: 14px; font-size: 16.5px; color: rgba(255, 255, 255, 0.9); }
.cta-banner__actions { position: relative; margin-top: 34px; display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ================= 关于我们 ================= */
.timeline { position: relative; padding: 20px 0; }
.timeline::before {
  content: ''; position: absolute; left: 50%; top: 0; bottom: 0; width: 2px;
  transform: translateX(-50%);
  background: linear-gradient(180deg, transparent, var(--c-orange) 12%, var(--c-orange) 88%, transparent);
  opacity: 0.35;
}
.timeline-item { position: relative; width: 50%; padding: 0 52px 44px 0; }
.timeline-item:nth-child(even) { margin-left: 50%; padding: 0 0 44px 52px; }
.timeline-item__dot {
  position: absolute; top: 26px; right: -9px; width: 18px; height: 18px; border-radius: 50%;
  background: var(--c-orange); border: 4px solid var(--bg-body);
  box-shadow: 0 0 0 4px rgba(255, 107, 26, 0.18);
}
.timeline-item:nth-child(even) .timeline-item__dot { right: auto; left: -9px; }
.timeline-item__card {
  background: #fff; border-radius: var(--radius); padding: 26px 28px; box-shadow: var(--sh-sm);
  transition: all var(--dur) var(--ease);
}
.timeline-item__card:hover { transform: translateY(-4px); box-shadow: var(--sh-lg); }
.timeline-item__year {
  font-size: 30px; font-weight: 700; line-height: 1;
  background: var(--grad-orange); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.timeline-item__title { margin-top: 10px; font-size: 17px; }
.timeline-item__desc { margin-top: 8px; font-size: 14px; line-height: 1.8; }

.gallery-item { position: relative; border-radius: var(--radius); overflow: hidden; box-shadow: var(--sh-sm); }
.gallery-item .media::before { padding-top: 72%; }
.gallery-item__mask {
  position: absolute; inset: 0; display: flex; align-items: flex-end; padding: 20px;
  background: linear-gradient(0deg, rgba(5, 11, 22, 0.9), transparent 62%);
  opacity: 0; transition: opacity var(--dur) var(--ease);
}
.gallery-item:hover .gallery-item__mask { opacity: 1; }
.gallery-item:hover .media img { transform: scale(1.07); }
.gallery-item__name { color: #fff; font-size: 15px; font-weight: 600; }

.cert-item {
  background: #fff; border-radius: var(--radius); overflow: hidden; box-shadow: var(--sh-sm);
  transition: all var(--dur) var(--ease); text-align: center; padding-bottom: 18px;
}
.cert-item:hover { transform: translateY(-6px); box-shadow: var(--sh-lg); }
.cert-item .media::before { padding-top: 128%; }
.cert-item .media { background: var(--bg-soft); }
.cert-item .media img { object-fit: cover; }
.cert-item__name { margin-top: 16px; font-size: 14.5px; font-weight: 600; color: var(--t-strong); }

.quality-quote {
  border-left: 4px solid var(--c-orange);
  padding: 8px 0 8px 28px; font-size: 17px; line-height: 1.9; color: #C8D5E4;
}

/* ================= 产品列表 ================= */
.products-layout { display: grid; grid-template-columns: 268px 1fr; gap: 36px; align-items: start; }

.filter-panel {
  position: sticky; top: calc(var(--nav-h) + 24px);
  background: #fff; border-radius: var(--radius-lg); box-shadow: var(--sh-sm); overflow: hidden;
}
.filter-block { padding: 24px 24px; border-bottom: 1px solid var(--bg-soft); }
.filter-block:last-child { border-bottom: none; }
.filter-block__title {
  font-size: 15px; font-weight: 700; color: var(--t-strong); margin-bottom: 14px;
  display: flex; align-items: center; gap: 9px;
}
.filter-block__title::before { content: ''; width: 3px; height: 15px; background: var(--grad-orange); border-radius: 2px; }

.filter-list li + li { margin-top: 2px; }
.filter-list button {
  width: 100%; display: flex; align-items: center; justify-content: space-between; gap: 10px;
  padding: 10px 14px; border-radius: var(--radius-sm);
  font-size: 14.5px; color: var(--t-body); text-align: left;
  transition: all var(--dur) var(--ease);
}
.filter-list button:hover { background: var(--bg-soft); color: var(--t-strong); }
.filter-list button.is-active { background: rgba(255, 107, 26, 0.1); color: var(--c-orange-dark); font-weight: 600; }
.filter-list__count {
  font-size: 12px; color: var(--t-muted); background: var(--bg-soft);
  padding: 1px 9px; border-radius: var(--radius-pill);
}
.filter-list button.is-active .filter-list__count { background: rgba(255, 107, 26, 0.18); color: var(--c-orange-dark); }

.load-dot { width: 11px; height: 11px; border-radius: 50%; flex: none; box-shadow: inset 0 0 0 1px rgba(15, 23, 42, 0.22); }

.products-toolbar {
  display: flex; align-items: center; gap: 16px; flex-wrap: wrap;
  background: #fff; border-radius: var(--radius); padding: 14px 18px;
  box-shadow: var(--sh-sm); margin-bottom: 26px;
}
.search-box { position: relative; flex: 1; min-width: 220px; }
.search-box svg {
  position: absolute; left: 14px; top: 50%; transform: translateY(-50%);
  width: 18px; height: 18px; color: var(--t-muted); pointer-events: none;
}
.search-box .input { padding-left: 42px; height: 44px; }
.products-toolbar .select { width: auto; min-width: 150px; height: 44px; padding-block: 0; }
.products-count { font-size: 14px; color: var(--t-muted); white-space: nowrap; }
.products-count b { color: var(--c-orange); font-size: 17px; }

.filter-toggle { display: none; }

.active-filters { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 20px; }
.chip {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 8px 6px 14px; border-radius: var(--radius-pill);
  background: rgba(255, 107, 26, 0.11); color: var(--c-orange-dark);
  font-size: 13px; font-weight: 500;
}
.chip button { display: grid; place-items: center; width: 18px; height: 18px; border-radius: 50%; background: rgba(255, 107, 26, 0.2); }
.chip svg { width: 11px; height: 11px; }

.products-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 26px; }

/* ================= 产品详情 ================= */
.detail-layout { display: grid; grid-template-columns: 1.05fr 1fr; gap: 56px; align-items: start; }

.gallery__main {
  position: relative; border-radius: var(--radius-lg); overflow: hidden;
  background: var(--c-navy-700); box-shadow: var(--sh);
}
.gallery__main::before { content: ''; display: block; padding-top: 75%; }
.gallery__main img {
  position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover;
  transition: transform 500ms var(--ease);
}
.gallery__main:hover img { transform: scale(1.12); }
.gallery__thumbs { display: flex; gap: 12px; margin-top: 14px; flex-wrap: wrap; }
.gallery__thumb {
  width: 88px; border-radius: var(--radius-sm); overflow: hidden;
  border: 2px solid transparent; background: var(--c-navy-700);
  transition: border-color var(--dur) var(--ease);
}
.gallery__thumb img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }
.gallery__thumb.is-active { border-color: var(--c-orange); }

.detail-info__cat { font-size: 13.5px; color: var(--c-orange); font-weight: 600; letter-spacing: 1px; }
.detail-info__model { margin-top: 10px; font-size: 40px; letter-spacing: -0.5px; }
.detail-info__name { margin-top: 8px; font-size: 17px; color: var(--t-body); }
.detail-info__summary { margin-top: 18px; font-size: 15px; line-height: 1.9; }
.detail-key-specs {
  margin-top: 26px; display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px;
}
.key-spec {
  background: #fff; border-radius: var(--radius); padding: 18px 20px;
  box-shadow: var(--sh-sm); border-left: 3px solid var(--c-orange);
}
.key-spec__label { font-size: 13px; color: var(--t-muted); }
.key-spec__value { margin-top: 5px; font-size: 21px; font-weight: 700; color: var(--t-strong); }
.key-spec__value small { font-size: 13px; font-weight: 500; color: var(--t-muted); margin-left: 3px; }
.detail-actions { margin-top: 30px; display: flex; gap: 14px; flex-wrap: wrap; }
.detail-meta { margin-top: 26px; padding-top: 22px; border-top: 1px dashed #D8E1EB; font-size: 13.5px; color: var(--t-muted); }

.app-tags { display: flex; gap: 11px; flex-wrap: wrap; margin-top: 18px; }

/* 详情补充块 */
.page-banner--compact { padding: calc(var(--nav-h) + 30px) 0 30px; }
.page-banner--compact .page-banner__title { font-size: 32px; margin-top: 12px; }

.detail-info__head { display: flex; align-items: center; gap: 14px; margin-bottom: 8px; flex-wrap: wrap; }

.detail-block { margin-top: 54px; }
.detail-block__title {
  display: flex; align-items: center; gap: 11px;
  font-size: 21px; color: var(--t-strong); margin-bottom: 22px;
  position: relative; padding-left: 16px;
}
.detail-block__title::before {
  content: ''; position: absolute; left: 0; top: 2px; bottom: 2px;
  width: 4px; border-radius: 3px; background: var(--grad-orange);
}
.db-icon { display: inline-flex; color: var(--c-orange); }
.db-icon svg { width: 22px; height: 22px; }

.detail-cols { display: grid; grid-template-columns: 1.4fr 1fr; gap: 40px; }
.detail-desc p { font-size: 15px; line-height: 1.95; color: var(--t-body); }
.detail-desc p + p { margin-top: 14px; }

.related-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 22px; }
.related-card { text-decoration: none; }
.related-card__body { padding: 16px 18px 20px; display: flex; flex-direction: column; gap: 4px; }
.related-card__model { font-size: 16px; font-weight: 700; color: var(--t-strong); transition: color var(--dur) var(--ease); }
.related-card:hover .related-card__model { color: var(--c-orange); }
.related-card__name { font-size: 13px; color: var(--t-muted); }

/* ================= 联系我们 ================= */
.contact-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.contact-card {
  background: #fff; border-radius: var(--radius-lg); padding: 34px 30px;
  box-shadow: var(--sh-sm); text-align: center;
  transition: all var(--dur) var(--ease);
}
.contact-card:hover { transform: translateY(-6px); box-shadow: var(--sh-lg); }
.contact-card__icon {
  width: 62px; height: 62px; margin: 0 auto; border-radius: 50%;
  display: grid; place-items: center;
  background: rgba(255, 107, 26, 0.1); color: var(--c-orange);
  transition: all var(--dur) var(--ease);
}
.contact-card:hover .contact-card__icon { background: var(--grad-orange); color: #fff; }
.contact-card__icon svg { width: 27px; height: 27px; }
.contact-card__label { margin-top: 20px; font-size: 15px; font-weight: 600; color: var(--t-strong); }
.contact-card__value { margin-top: 8px; font-size: 15px; color: var(--t-body); line-height: 1.8; }
.contact-card__value a:hover { color: var(--c-orange); }

.contact-layout { display: grid; grid-template-columns: 1.15fr 1fr; gap: 44px; align-items: start; }
.form-card { background: #fff; border-radius: var(--radius-lg); padding: 38px 38px 34px; box-shadow: var(--sh); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }

.map-placeholder {
  position: relative; border-radius: var(--radius-lg); overflow: hidden;
  background: linear-gradient(135deg, #17304F, #0A1526);
  min-height: 420px; display: grid; place-items: center; text-align: center; padding: 40px;
  color: #9DB0C7;
}
.map-placeholder::before {
  content: ''; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 34px 34px;
}
.map-placeholder__inner { position: relative; }
.map-pin {
  width: 68px; height: 68px; margin: 0 auto 20px; border-radius: 50%;
  display: grid; place-items: center; background: rgba(255, 107, 26, 0.16); color: var(--c-orange-light);
  animation: pulse 2.4s ease-in-out infinite;
}
.map-pin svg { width: 32px; height: 32px; }
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(255, 107, 26, 0.35); }
  50% { box-shadow: 0 0 0 20px rgba(255, 107, 26, 0); }
}
.map-placeholder h3 { color: #fff; font-size: 19px; }
.map-placeholder p { margin-top: 10px; font-size: 14.5px; }

/* ── FAQ ── */
.faq-item {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: 0 1px 3px rgba(0,0,0,.06);
  overflow: hidden;
  transition: box-shadow 280ms var(--ease);
}
.faq-item + .faq-item { margin-top: 12px; }
.faq-item.is-open { box-shadow: 0 4px 16px rgba(0,0,0,.08); }

.faq-item__q {
  width: 100%; display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 18px 24px; font-size: 15.5px; font-weight: 600; color: var(--t-strong); text-align: left;
  background: transparent; border: 0; cursor: pointer;
  transition: background 200ms var(--ease), color 200ms var(--ease);
}
.faq-item__q:hover { background: #fafafa; color: var(--c-orange); }
.faq-item.is-open .faq-item__q { color: var(--c-orange); }

/* chevron —— ± 纯 CSS */
.faq-item__chevron {
  width: 22px; height: 22px; flex: none; position: relative; display: block;
}
.faq-item__chevron::before,
.faq-item__chevron::after {
  content: ''; position: absolute; background: currentColor; border-radius: 2px;
  transition: transform 280ms var(--ease), opacity 280ms var(--ease);
}
.faq-item__chevron::before {
  top: 50%; left: 0; width: 100%; height: 2px; margin-top: -1px;
}
.faq-item__chevron::after {
  top: 0; left: 50%; height: 100%; width: 2px; margin-left: -1px;
  opacity: 1;
}
.faq-item.is-open .faq-item__chevron::after {
  transform: rotate(90deg); opacity: 0;
}

/* answer */
.faq-item__a {
  max-height: 0; overflow: hidden;
  transition: max-height 380ms var(--ease);
}
.faq-item.is-open .faq-item__a { max-height: 600px; }
.faq-item__a-inner {
  padding: 0 24px 20px; font-size: 14.5px; line-height: 1.85;
  color: var(--t-default); border-top: 1px solid #f0f0f0;
}

/* ================= 下载中心 ================= */
.download-tabs {
  display: flex; gap: 10px; flex-wrap: wrap;
  margin-bottom: 32px; justify-content: center;
}
.download-tab {
  padding: 9px 22px; border-radius: 24px; border: 1.5px solid var(--border);
  background: #fff; font-size: 14.5px; font-weight: 500; color: var(--t-default);
  cursor: pointer; transition: all 220ms var(--ease);
}
.download-tab:hover { border-color: var(--c-orange); color: var(--c-orange); }
.download-tab.is-active {
  background: var(--c-orange); border-color: var(--c-orange); color: #fff;
}

/* ── 卡片列表 ── */
.download-card {
  display: flex; align-items: center; gap: 22px;
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 22px 24px; transition: box-shadow 220ms var(--ease), border-color 220ms var(--ease);
}
.download-card + .download-card { margin-top: 14px; }
.download-card:hover { box-shadow: 0 6px 20px rgba(0,0,0,.07); border-color: #D0DAE5; }

.download-card__icon { flex: none; }
.download-card__cat-tag { font-size: 12.5px; padding: 5px 14px; border-radius: 20px; font-weight: 500; }
.tag--manual { background: #EFF6FF; color: #2563EB; }
.tag--datasheet { background: #FEF3C7; color: #D97706; }
.tag--cert { background: #ECFDF5; color: #059669; }

.download-card__body { flex: 1; min-width: 0; }
.download-card__title { font-size: 16px; font-weight: 600; color: var(--t-strong); }
.download-card__desc { margin-top: 6px; font-size: 14px; color: var(--t-muted); line-height: 1.6; }
.download-card__meta {
  margin-top: 10px; display: flex; gap: 18px; flex-wrap: wrap;
  font-size: 13px; color: var(--t-muted); align-items: center;
}
.download-card__type,
.download-card__size,
.download-card__date { display: flex; align-items: center; gap: 5px; }
.download-card__type svg,
.download-card__size svg,
.download-card__date svg { width: 15px; height: 15px; opacity: .65; }

.download-card__action { flex: none; }
.download-card__action .btn--sm { padding: 10px 20px; font-size: 14px; }

/* empty 覆盖 */
.empty-state.hidden { display: none; }

@media (max-width: 640px) {
  .download-card { flex-direction: column; align-items: flex-start; gap: 14px; }
  .download-card__action { width: 100%; }
  .download-card__action .btn { width: 100%; justify-content: center; }
}

/* ================= 404 ================= */
.notfound {
  min-height: 100vh; display: grid; place-items: center; text-align: center;
  background: var(--grad-dark); padding: 40px 24px;
}
.notfound__code {
  font-size: 128px; font-weight: 700; line-height: 1;
  background: var(--grad-orange); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.notfound h1 { margin-top: 18px; font-size: 26px; color: #fff; }
.notfound p { margin-top: 12px; color: #9DB0C7; }

/* ================= 响应式 ================= */
@media (max-width: 1200px) {
  .products-layout { grid-template-columns: 240px 1fr; gap: 26px; }
  .products-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 1024px) {
  .about-split { grid-template-columns: 1fr; gap: 46px; }
  .about-split__badge { left: 18px; }
  .about-split__media::after { display: none; }
  .process { grid-template-columns: repeat(3, 1fr); gap: 26px; }
  .process-step::after, .process-step::before { display: none; }
  .detail-layout { grid-template-columns: 1fr; gap: 36px; }
  .contact-layout { grid-template-columns: 1fr; }
  .contact-cards { grid-template-columns: 1fr; }
  .stats-bar__grid { grid-template-columns: repeat(2, 1fr); }
  .stat:nth-child(3)::before { display: none; }
  .related-grid { grid-template-columns: repeat(2, 1fr); }
  .detail-cols { grid-template-columns: 1fr; gap: 22px; }
}

@media (max-width: 900px) {
  .products-layout { grid-template-columns: 1fr; }
  .filter-panel {
    position: fixed; inset: 0; z-index: 200; border-radius: 0; overflow-y: auto;
    transform: translateX(-100%); transition: transform 320ms var(--ease);
  }
  .filter-panel.is-open { transform: none; }
  .filter-panel__close { display: flex !important; }
  .filter-toggle { display: inline-flex; }
}

@media (max-width: 768px) {
  .stats-bar { margin-top: -40px; }
  .stat { padding: 26px 14px; }
  .stat__value { font-size: 30px; }
  .about-split__list { grid-template-columns: 1fr; }
  .process { grid-template-columns: repeat(2, 1fr); }
  .process-step::after, .process-step::before { display: none; }
  .timeline::before { left: 9px; }
  .timeline-item, .timeline-item:nth-child(even) { width: 100%; margin-left: 0; padding: 0 0 30px 34px; }
  .timeline-item__dot, .timeline-item:nth-child(even) .timeline-item__dot { left: 0; right: auto; }
  .products-grid { grid-template-columns: 1fr; }
  .detail-info__model { font-size: 28px; }
  .detail-key-specs { grid-template-columns: 1fr; }
  .related-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .form-card { padding: 26px 22px 22px; }
  .cta-banner { padding: 42px 24px; }
  .cta-banner__title { font-size: 24px; }
  .notfound__code { font-size: 88px; }
}

@media (max-width: 480px) {
  .process { grid-template-columns: 1fr; }
  .process-step::after, .process-step::before { display: none; }
  .gallery__thumb { width: 70px; }
}