/* ============================================================
   页面通用样式 v3.0 - 移动端滚动动画全面增强
   ============================================================ */

/* ========== 分类筛选栏 ========== */
.filter-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 48px;
}

.filter-bar__btn {
  padding: 10px 24px;
  font-size: 0.84rem;
  font-weight: 400;
  color: var(--text-secondary);
  background: var(--color-off-white);
  border-radius: var(--radius-full);
  transition: all 0.35s var(--ease-out-quart);
  cursor: pointer;
  letter-spacing: 0.3px;
  border: 1px solid transparent;
  -webkit-tap-highlight-color: transparent;
}

.filter-bar__btn:hover {
  color: var(--text-primary);
  background: var(--color-cream);
  transform: translateY(-1px);
}

.filter-bar__btn:active {
  transform: translateY(0) scale(0.96);
}

.filter-bar__btn--active {
  color: var(--color-white);
  background: var(--color-black);
  font-weight: 500;
  border-color: var(--color-black);
}

.filter-bar__btn:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
}

/* ========== 搜索栏 ========== */
.search-bar {
  max-width: 500px;
  margin: 0 auto 56px;
  position: relative;
}

.search-bar__input {
  width: 100%;
  padding: 15px 52px 15px 22px;
  font-size: 0.9rem;
  color: var(--text-primary);
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  transition: all 0.3s ease;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.02);
  -webkit-appearance: none;
}

.search-bar__input:focus {
  border-color: rgba(0, 0, 0, 0.28);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

.search-bar__icon {
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-tertiary);
  font-size: 1.05rem;
}

/* ========== 空状态 ========== */
.empty-state {
  text-align: center;
  padding: 88px 24px;
  color: var(--text-tertiary);
}

.empty-state__icon {
  font-size: 3.5rem;
  margin-bottom: 18px;
  opacity: 0.25;
}

.empty-state__text {
  font-size: 1.04rem;
  font-weight: 350;
}

/* ========== CTA 区域 ========== */
.cta-section {
  background: linear-gradient(180deg, var(--color-off-white) 0%, #f5f4f1 100%);
  padding: var(--section-padding) 0;
  text-align: center;
}

.cta-section__title {
  font-size: clamp(1.6rem, 3.5vw, 2.2rem);
  font-weight: 280;
  color: var(--text-primary);
  margin-bottom: 18px;
  letter-spacing: -0.015em;
}

.cta-section__desc {
  font-size: 1.02rem;
  color: var(--text-secondary);
  margin-bottom: 36px;
  font-weight: 350;
}

.cta-section__links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 18px;
}

/* ========== 产品详情页 ========== */
.product-detail {
  padding: 72px 0;
}

.product-detail__breadcrumb {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 56px;
  font-size: 0.84rem;
  color: var(--text-tertiary);
}

.product-detail__breadcrumb a {
  color: var(--text-secondary);
  transition: all 0.3s var(--ease-out-quart);
}

.product-detail__breadcrumb a:hover {
  color: var(--text-primary);
}

.product-detail__breadcrumb span {
  color: var(--text-primary);
  font-weight: 500;
}

.product-detail__overview {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 72px;
  margin-bottom: 88px;
}

.product-detail__image {
  aspect-ratio: 1;
  background: linear-gradient(135deg, var(--color-off-white), #fafaf9);
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border: 1px solid var(--color-border-light);
}

.product-detail__image-placeholder {
  color: var(--text-tertiary);
  text-align: center;
}

.product-detail__image-placeholder svg {
  opacity: 0.18;
  margin-bottom: 14px;
}

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

.product-detail__category {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 2.5px;
  margin-bottom: 14px;
}

.product-detail__name {
  font-size: clamp(2rem, 3.5vw, 2.6rem);
  font-weight: 280;
  color: var(--text-primary);
  margin-bottom: 24px;
  letter-spacing: -0.025em;
  line-height: 1.15;
}

.product-detail__desc {
  font-size: 1.02rem;
  color: var(--text-secondary);
  line-height: 1.9;
  margin-bottom: 36px;
  font-weight: 350;
}

.product-detail__actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* 规格参数表 */
.product-detail__specs {
  margin-bottom: 88px;
}

.product-detail__section-title {
  font-size: 1.6rem;
  font-weight: 280;
  color: var(--text-primary);
  margin-bottom: 36px;
  letter-spacing: -0.015em;
}

.product-detail__spec-table {
  width: 100%;
  border-collapse: collapse;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border-light);
}

.product-detail__spec-table tr {
  border-bottom: 1px solid var(--color-border-light);
}

.product-detail__spec-table tr:last-child { border-bottom: none; }

.product-detail__spec-table td {
  padding: 17px 22px;
  font-size: 0.9rem;
}

.product-detail__spec-table td:first-child {
  width: 200px;
  font-weight: 500;
  color: var(--text-primary);
  background: var(--color-off-white);
}

.product-detail__spec-table td:last-child {
  color: var(--text-secondary);
  font-weight: 350;
}

/* 功能特点 */
.product-detail__features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  margin-bottom: 88px;
}

.product-detail__feature-card {
  padding: 32px 28px;
  background: var(--color-off-white);
  border: 1px solid transparent;
  border-radius: var(--radius-lg);
  transition: all 0.45s var(--ease-out-quart);
  -webkit-tap-highlight-color: transparent;
}

.product-detail__feature-card:hover {
  background: var(--color-white);
  border-color: var(--color-border-light);
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.04);
}

.product-detail__feature-card:active {
  transform: translateY(-1px) scale(0.985);
}

.product-detail__feature-icon {
  font-size: 1.6rem;
  margin-bottom: 14px;
}

.product-detail__feature-title {
  font-size: 1.02rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 10px;
}

.product-detail__feature-desc {
  font-size: 0.86rem;
  color: var(--text-secondary);
  line-height: 1.75;
  font-weight: 350;
}

/* 适配场景 */
.product-detail__scenarios {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 88px;
}

.product-detail__scenario-tag {
  padding: 9px 22px;
  font-size: 0.86rem;
  font-weight: 400;
  color: var(--text-secondary);
  background: var(--color-off-white);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-full);
  transition: all 0.35s var(--ease-out-quart);
  -webkit-tap-highlight-color: transparent;
}

.product-detail__scenario-tag:hover {
  transform: translateY(-2px);
  background: var(--color-white);
  border-color: rgba(0, 0, 0, 0.18);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

/* FAQ */
.product-detail__faq {
  margin-bottom: 88px;
}

.product-detail__faq-item {
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  margin-bottom: 14px;
  overflow: hidden;
  transition: all 0.35s var(--ease-out-quart);
}

.product-detail__faq-item:hover {
  border-color: rgba(0, 0, 0, 0.12);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.03);
}

.product-detail__faq-q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 28px;
  font-size: 0.96rem;
  font-weight: 500;
  color: var(--text-primary);
  cursor: pointer;
  background: var(--color-off-white);
  border: none;
  width: 100%;
  text-align: left;
  transition: background 0.3s ease;
  letter-spacing: -0.005em;
  -webkit-tap-highlight-color: transparent;
}

.product-detail__faq-q:hover { background: var(--color-cream); }

.product-detail__faq-a {
  padding: 22px 28px;
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.85;
  font-weight: 350;
  display: none;
}

.product-detail__faq-item--open .product-detail__faq-a { display: block; }

/* 产品详情 CTA */
.product-detail__cta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  justify-content: center;
  padding-top: 56px;
  border-top: 1px solid var(--color-border-light);
}

/* ========== 视频教程页 ========== */
.video-card {
  display: flex;
  flex-direction: column;
  background: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border-light);
  transition: all 0.5s var(--ease-out-quart);
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.video-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 16px 44px rgba(0, 0, 0, 0.07);
  border-color: rgba(0, 0, 0, 0.1);
}

.video-card:active {
  transform: translateY(-2px) scale(0.98);
}

/* 移动端：禁用 hover 提升效果 */
@media (hover: none) and (pointer: coarse) {
  .video-card:hover {
    transform: none;
    box-shadow: none;
    border-color: var(--color-border-light);
  }
  .video-card:active { transform: scale(0.98); }
  .video-card:hover .video-card__play-icon { transform: none; }
}

.video-card__thumb {
  position: relative;
  aspect-ratio: 16 / 9;
  background: var(--color-off-black);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.video-card__play-icon {
  width: 60px; height: 60px;
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.55);
  backdrop-filter: blur(8px);
  color: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  transition: all 0.35s ease;
}

.video-card:hover .video-card__play-icon {
  background: rgba(0, 0, 0, 0.75);
  transform: scale(1.12);
}

.video-card__duration {
  position: absolute;
  bottom: 10px;
  right: 10px;
  padding: 3px 10px;
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--color-white);
  background: rgba(0, 0, 0, 0.65);
  border-radius: 4px;
}

.video-card__info { padding: 22px; }

.video-card__category {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 10px;
}

.video-card__title {
  font-size: 1.02rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 10px;
  line-height: 1.4;
}

.video-card__desc {
  font-size: 0.82rem;
  color: var(--text-tertiary);
  line-height: 1.65;
  font-weight: 350;
}

/* 视频弹窗 */
.video-modal {
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: rgba(0, 0, 0, 0.88);
  backdrop-filter: blur(8px);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 40px;
}

.video-modal--open { display: flex; }

.video-modal__content {
  position: relative;
  width: 100%;
  max-width: 920px;
  aspect-ratio: 16 / 9;
  background: var(--color-black);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.video-modal__close {
  position: absolute;
  top: -44px;
  right: 0;
  width: 38px; height: 38px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  color: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  transition: all 0.3s ease;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.video-modal__close:hover {
  background: rgba(255, 255, 255, 0.15);
  transform: scale(1.1);
}

.video-modal__placeholder {
  width: 100%; height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.35);
}

/* ========== 下载页 ========== */
.downloads-table {
  width: 100%;
  border-collapse: collapse;
}

.downloads-table thead th {
  padding: 15px 18px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.6px;
  text-align: left;
  border-bottom: 2px solid var(--color-border-light);
}

.downloads-table tbody tr {
  border-bottom: 1px solid var(--color-border-light);
  transition: all 0.35s var(--ease-out-quart);
}

.downloads-table tbody tr:hover {
  background: #fafbfc;
}

.downloads-table tbody td {
  padding: 17px 18px;
  font-size: 0.86rem;
  color: var(--text-secondary);
  font-weight: 350;
}

.downloads-table__name {
  font-weight: 500;
  color: var(--text-primary);
}

.downloads-table__type {
  display: inline-flex;
  padding: 3px 12px;
  font-size: 0.7rem;
  font-weight: 500;
  border-radius: var(--radius-full);
  letter-spacing: 0.3px;
}

.downloads-table__type--driver { background: rgba(26, 115, 232, 0.07); color: #1a73e8; }
.downloads-table__type--firmware { background: rgba(255, 107, 53, 0.07); color: #ff6b35; }
.downloads-table__type--manual { background: rgba(226, 35, 26, 0.07); color: #e2231a; }
.downloads-table__type--guide { background: rgba(0, 180, 216, 0.07); color: #00b4d8; }

.downloads-table__btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 9px 20px;
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--color-white);
  background: var(--color-black);
  border-radius: var(--radius-full);
  transition: all 0.35s var(--ease-out-quart);
  cursor: pointer;
  text-decoration: none;
  -webkit-tap-highlight-color: transparent;
}

.downloads-table__btn:hover {
  background: var(--color-off-black);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
}

.downloads-table__btn:active {
  transform: translateY(0) scale(0.95);
}

/* ========== 关于我们 ========== */
.about-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
  margin-bottom: 88px;
}

.about-stats__card {
  text-align: center;
  padding: 44px 24px;
  background: var(--color-white);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-xl);
  transition: all 0.45s var(--ease-out-quart);
  -webkit-tap-highlight-color: transparent;
}

.about-stats__card:hover {
  border-color: rgba(37, 99, 235, 0.2);
  transform: translateY(-8px) scale(1.02);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.08);
}

.about-stats__card:active {
  transform: translateY(-3px) scale(0.975);
}

.about-stats__number {
  font-size: clamp(2.2rem, 3.5vw, 3rem);
  font-weight: 280;
  color: var(--text-primary);
  margin-bottom: 10px;
  letter-spacing: -0.03em;
}

.about-stats__label {
  font-size: 0.88rem;
  color: var(--text-tertiary);
  font-weight: 350;
}

/* 时间线 */
.timeline {
  position: relative;
  max-width: 840px;
  margin: 0 auto 88px;
  padding-left: 44px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 1px;
  background: linear-gradient(180deg, var(--color-border), var(--color-border-light), transparent);
}

.timeline__item {
  position: relative;
  padding-bottom: 56px;
}

.timeline__item:last-child { padding-bottom: 0; }

.timeline__item::before {
  content: '';
  position: absolute;
  left: -48px;
  top: 8px;
  width: 10px; height: 10px;
  background: var(--color-black);
  border-radius: 50%;
  box-shadow: 0 0 0 4px rgba(0, 0, 0, 0.06);
}

.timeline__year {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-accent);
  letter-spacing: 2.5px;
  margin-bottom: 10px;
}

.timeline__title {
  font-size: 1.18rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 10px;
}

.timeline__desc {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.85;
  font-weight: 350;
}

/* 品牌实力卡片 */
.strength-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
  margin-bottom: 88px;
}

.strength-card {
  text-align: center;
  padding: 44px 28px;
  background: var(--color-off-white);
  border-radius: var(--radius-xl);
  transition: all 0.45s var(--ease-out-quart);
  -webkit-tap-highlight-color: transparent;
}

.strength-card:hover {
  background: #f7f7f4;
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.04);
}

.strength-card:active {
  transform: translateY(-2px) scale(0.97);
}

.strength-card__icon {
  font-size: 2.8rem;
  margin-bottom: 18px;
}

.strength-card__title {
  font-size: 1.08rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.strength-card__desc {
  font-size: 0.86rem;
  color: var(--text-tertiary);
  line-height: 1.75;
  font-weight: 350;
}

/* 合作伙伴权益 */
.benefits-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  margin-bottom: 88px;
}

.benefit-item {
  text-align: center;
  padding: 36px 22px;
  background: rgba(255, 255, 255, 0.035);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-lg);
  transition: all 0.45s var(--ease-out-quart);
  color: var(--text-inverse);
  -webkit-tap-highlight-color: transparent;
}

.benefit-item:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.1);
  transform: translateY(-4px);
}

.benefit-item:active {
  transform: translateY(-2px) scale(0.97);
}

.benefit-item__icon {
  font-size: 2.2rem;
  margin-bottom: 14px;
}

.benefit-item__title {
  font-size: 1.02rem;
  font-weight: 500;
  margin-bottom: 10px;
}

.benefit-item__desc {
  font-size: 0.84rem;
  color: var(--text-inverse-secondary);
  line-height: 1.75;
  font-weight: 350;
}

/* ========== 联系我们 ========== */
.contact-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  margin-bottom: 72px;
}

.contact-card {
  text-align: center;
  padding: 44px 32px;
  background: var(--color-off-white);
  border-radius: var(--radius-xl);
  transition: all 0.45s var(--ease-out-quart);
  -webkit-tap-highlight-color: transparent;
}

.contact-card:hover {
  background: #f7f7f4;
  transform: translateY(-8px) scale(1.02);
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.07);
}

.contact-card:active {
  transform: translateY(-3px) scale(0.975);
}

.contact-card__icon {
  font-size: 2.8rem;
  margin-bottom: 18px;
}

.contact-card__title {
  font-size: 1.12rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 18px;
}

.contact-card__info {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 2.1;
  font-weight: 350;
}

/* 联系表单 */
.contact-form-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 72px;
  margin-bottom: 72px;
}

.contact-form__title {
  font-size: 1.6rem;
  font-weight: 280;
  color: var(--text-primary);
  margin-bottom: 14px;
  letter-spacing: -0.015em;
}

.contact-form__desc {
  font-size: 0.96rem;
  color: var(--text-secondary);
  margin-bottom: 36px;
  font-weight: 350;
}

.form-group {
  margin-bottom: 22px;
}

.form-group label {
  display: block;
  font-size: 0.84rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 9px;
  letter-spacing: 0.2px;
}

/* 必填星号 */
.form-group label .required-mark,
.required-mark { color: #ef4444; margin-left: 2px; font-weight: 600; }

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 13px 18px;
  font-size: 0.9rem;
  color: var(--text-primary);
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: all 0.3s ease;
  -webkit-appearance: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: rgba(0, 0, 0, 0.28);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.04);
}

.form-group textarea {
  resize: vertical;
  min-height: 148px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.form-submit {
  margin-top: 10px;
}

/* 微信二维码区 */
.contact-qrcode {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 48px;
  background: var(--color-off-white);
  border-radius: var(--radius-xl);
  text-align: center;
}

.contact-qrcode__img {
  width: 192px; height: 192px;
  background: var(--color-white);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  color: var(--text-tertiary);
  font-size: 0.82rem;
  margin-bottom: 18px;
}

.contact-qrcode__title {
  font-size: 1.02rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 10px;
}

.contact-qrcode__desc {
  font-size: 0.86rem;
  color: var(--text-tertiary);
  font-weight: 350;
}

/* 地图区 */
.contact-map {
  width: 100%;
  height: 380px;
  background: var(--color-off-white);
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-tertiary);
  font-weight: 350;
  margin-bottom: 72px;
  border: 1px solid var(--color-border-light);
}

/* ========== 响应式 ========== */
@media (max-width: 968px) {
  .product-detail__overview { grid-template-columns: 1fr; gap: 44px; }
  .product-detail__features { grid-template-columns: repeat(2, 1fr); }
  .about-stats { grid-template-columns: repeat(2, 1fr); }
  .strength-grid { grid-template-columns: repeat(2, 1fr); }
  .benefits-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-cards { grid-template-columns: 1fr; }
  .contact-form-wrap { grid-template-columns: 1fr; gap: 44px; }
}

@media (max-width: 640px) {
  .product-detail { padding: 48px 0; }
  .product-detail__features { grid-template-columns: 1fr; }
  .product-detail__overview { gap: 32px; }
  .product-detail__breadcrumb { margin-bottom: 36px; }
  .product-detail__specs { margin-bottom: 56px; }
  .about-stats { grid-template-columns: 1fr 1fr; gap: 14px; }
  .strength-grid { grid-template-columns: 1fr; }
  .benefits-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .product-detail__spec-table td:first-child { width: 120px; }
  .downloads-table { font-size: 0.8rem; }
  .downloads-table thead { display: none; }
  .downloads-table tbody td { display: block; padding: 8px 16px; }
  .downloads-table tbody td::before {
    content: attr(data-label);
    font-weight: 500;
    color: var(--text-primary);
    display: inline-block;
    width: 80px;
  }
  .about-stats__card { padding: 28px 14px; }
  .contact-form-wrap { gap: 32px; }
  .contact-qrcode { padding: 32px 24px; }
  .contact-qrcode__img { width: 152px; height: 152px; }
  .timeline { padding-left: 32px; }
  .timeline__item::before { left: -36px; width: 8px; height: 8px; }
  .filter-bar { gap: 6px; margin-bottom: 32px; }
  .filter-bar__btn { padding: 8px 16px; font-size: 0.78rem; }
  .search-bar { margin-bottom: 36px; }
}

@media (max-width: 480px) {
  .about-stats { grid-template-columns: 1fr 1fr; gap: 10px; }
  .about-stats__card { padding: 24px 12px; border-radius: var(--radius-lg); }
  .about-stats__number { font-size: 1.6rem; }
  .cta-section__links { flex-direction: column; align-items: center; }
  .product-detail__actions { flex-direction: column; }
  .product-detail__actions .btn { width: 100%; }
  .contact-card { padding: 32px 20px; }
  .video-modal { padding: 16px; }
}