/* ==========================================================================
   Axiom Switches — 品牌官网样式
   设计风格：简约高级 · 深灰 / 米白 / 金属银
   ========================================================================== */

/* --- CSS 变量 --- */
:root {
  --color-bg: #f7f5f0;
  --color-bg-alt: #eeece6;
  --color-surface: #ffffff;
  --color-dark: #1a1a1c;
  --color-dark-soft: #2d2d30;
  --color-text: #3a3a3e;
  --color-text-muted: #6b6b70;
  --color-silver: #a8a9ad;
  --color-silver-light: #c8c9cc;
  --color-accent: #5c5c62;
  --color-border: #e0ddd6;
  --color-shadow: rgba(26, 26, 28, 0.08);
  --color-shadow-deep: rgba(26, 26, 28, 0.18);

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, "Noto Sans SC", "PingFang SC",
    "Microsoft YaHei", sans-serif;

  --header-height: 72px;
  --container-max: 1200px;
  --section-padding: clamp(4rem, 8vw, 7rem);
  --radius: 6px;
  --radius-lg: 12px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* --- 重置与基础 --- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

img,
iframe {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition), opacity var(--transition);
}

ul {
  list-style: none;
}

address {
  font-style: normal;
}

code {
  font-size: 0.875em;
  background: var(--color-bg-alt);
  padding: 0.15em 0.45em;
  border-radius: 4px;
}

/* --- 布局容器 --- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 4vw, 2.5rem);
}

.section {
  padding: var(--section-padding) 0;
}

.section-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-silver);
  margin-bottom: 0.75rem;
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 300;
  letter-spacing: -0.02em;
  color: var(--color-dark);
  margin-bottom: 1rem;
  line-height: 1.2;
}

.section-desc {
  color: var(--color-text-muted);
  max-width: 560px;
  margin-bottom: 3rem;
}

/* --- 顶部导航 --- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  background: rgba(247, 245, 240, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.site-header.scrolled {
  border-bottom-color: var(--color-border);
  box-shadow: 0 1px 20px var(--color-shadow);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 4vw, 2.5rem);
}

.nav-logo {
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--color-dark);
}

.nav-logo:hover {
  color: var(--color-accent);
}

.nav-menu {
  display: flex;
  gap: clamp(1rem, 3vw, 2.5rem);
}

.nav-link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-muted);
  letter-spacing: 0.02em;
  position: relative;
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-dark);
  transition: width var(--transition);
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-dark);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

/* 移动端菜单按钮 */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 100%;
  height: 1.5px;
  background: var(--color-dark);
  transition: transform var(--transition), opacity var(--transition);
}

.nav-toggle.open span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}

.nav-toggle.open span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.open span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

/* Hero 锚点占位 */
.hero-anchor {
  height: var(--header-height);
}

/* --- 公司简介 --- */
.section-about {
  background: var(--color-surface);
}

.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 1.5rem;
  align-items: stretch;
  width: 100%;
}

.about-grid > * {
  min-width: 0;
}

.about-content {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.about-content__head .section-label {
  margin-bottom: 0.75rem;
}

.about-content__head .section-title {
  margin-bottom: 0;
}

.about-lead {
  font-size: 1.125rem;
  color: var(--color-dark-soft);
  margin-bottom: 1.25rem;
  line-height: 1.8;
}

.about-content p {
  color: var(--color-text-muted);
  margin-bottom: 1rem;
}

.about-stats {
  display: flex;
  gap: clamp(1.5rem, 4vw, 3rem);
  margin-top: auto;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
}

.about-stats li {
  display: flex;
  flex-direction: column;
}

.about-stats strong {
  font-size: 1.5rem;
  font-weight: 300;
  color: var(--color-dark);
  letter-spacing: -0.02em;
}

.about-stats span {
  font-size: 0.8rem;
  color: var(--color-silver);
  margin-top: 0.25rem;
}

/* 公司简介 — 门面图 */
.about-photo {
  margin: 0;
  width: 100%;
  align-self: start;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-bg-alt);
  aspect-ratio: 16 / 9;
}

.about-photo__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
}

/* --- 公司详情（凯华式图文轮播板块） --- */
.section-detail {
  background: var(--color-bg);
  content-visibility: auto;
  contain-intrinsic-size: auto 1200px;
}

#products.section {
  content-visibility: auto;
  contain-intrinsic-size: auto 900px;
}

.section-title--center {
  text-align: center;
  margin-bottom: 1.5rem;
}

.detail-lead {
  max-width: 820px;
  margin: 0 auto 3.5rem;
  text-align: center;
  font-size: 1.05rem;
  line-height: 1.9;
  color: var(--color-dark-soft);
}

.detail-section-head {
  text-align: center;
  margin: 3.5rem 0 2rem;
  padding-top: 1rem;
  border-top: 1px solid var(--color-border);
}

.detail-section-head:first-of-type {
  border-top: none;
  padding-top: 0;
  margin-top: 0;
}

.detail-section-head__en {
  display: block;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.28em;
  color: var(--color-silver);
  margin-bottom: 0.5rem;
}

.detail-section-head__title {
  font-size: clamp(1.35rem, 3vw, 1.75rem);
  font-weight: 300;
  color: var(--color-dark);
  letter-spacing: 0.04em;
}

.detail-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
  margin-bottom: 2.5rem;
}

.detail-row--reverse .media-carousel {
  order: 2;
}

.detail-row--reverse .detail-row__text {
  order: 1;
}

.detail-row__text h4 {
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--color-dark);
  margin-bottom: 0.85rem;
}

.detail-row__text p {
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--color-text-muted);
  margin-bottom: 0.85rem;
}

.detail-row__text p:last-child {
  margin-bottom: 0;
}

.detail-row__text strong {
  color: var(--color-dark);
  font-weight: 500;
}

.media-carousel {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  box-shadow: 0 8px 32px var(--color-shadow);
}

.carousel-viewport {
  overflow: hidden;
  aspect-ratio: 4 / 3;
}

.carousel-track {
  display: flex;
  height: 100%;
  transition: transform 0.45s cubic-bezier(0.4, 0, 0.2, 1);
}

.carousel-slide {
  flex: 0 0 100%;
  margin: 0;
  height: 100%;
}

.carousel-slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
}

/* 专利书、商标注册证：框尺寸不变，竖图按高度顶满，便于阅读 */
.media-carousel--fit-doc .carousel-viewport,
.media-carousel--fit-doc .carousel-slide {
  background: var(--color-bg-alt);
}

.media-carousel--fit-doc .carousel-slide {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  box-sizing: border-box;
}

.media-carousel--fit-doc .carousel-slide img {
  display: block;
  width: auto;
  height: 100%;
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  object-position: center;
}

.carousel-slide--placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-surface-elevated, #f0f0f2);
}

.carousel-placeholder {
  padding: 2rem;
  text-align: center;
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--color-silver);
}

.carousel-placeholder code {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

/* 箭头隐藏，左右各约 32% 区域可点击切换 */
.carousel-btn {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 32%;
  height: 100%;
  margin: 0;
  padding: 0;
  border: none;
  border-radius: 0;
  background: transparent;
  color: transparent;
  font-size: 0;
  line-height: 0;
  cursor: pointer;
  z-index: 4;
  opacity: 0;
  transform: none;
  transition: none;
}

.carousel-btn:hover,
.carousel-btn:focus {
  background: transparent;
  opacity: 0;
}

.carousel-btn--prev {
  left: 0;
}

.carousel-btn--next {
  right: 0;
}

.media-carousel:hover {
  cursor: default;
}

.media-carousel .carousel-viewport {
  cursor: default;
}

/* 轮播点叠在图片底部，去掉框内下方白条 */
.carousel-dots {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 3;
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  padding: 1.1rem 0.75rem 0.65rem;
  margin: 0;
  background: linear-gradient(to top, rgba(26, 26, 28, 0.38), transparent);
  pointer-events: none;
}

.carousel-dot {
  pointer-events: auto;
  width: 8px;
  height: 8px;
  padding: 0;
  border: none;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.55);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.25);
  cursor: pointer;
  transition: background var(--transition), transform var(--transition);
}

.carousel-dot.is-active {
  background: #fff;
  transform: scale(1.15);
}

/* 证书类白底图：指示点用深色更易辨认 */
.media-carousel--fit-doc .carousel-dot {
  background: rgba(26, 26, 28, 0.22);
  box-shadow: none;
}

.media-carousel--fit-doc .carousel-dot.is-active {
  background: var(--color-dark);
}

.detail-images-hint {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
  font-size: 0.8rem;
  line-height: 1.7;
  color: var(--color-silver);
  text-align: center;
}

/* --- 产品详情 --- */
.section-products {
  background: var(--color-bg);
}

.section-desc a {
  color: var(--color-dark-soft);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.section-desc a:hover {
  color: var(--color-dark);
}

.products-toolbar {
  margin-bottom: 2.5rem;
}

.product-search-wrap {
  max-width: 640px;
}

.product-search__tag {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-silver);
  margin-bottom: 0.65rem;
}

.product-search-bar {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.35rem 0.35rem 0.35rem 1rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: 0 4px 24px var(--color-shadow);
  transition: border-color var(--transition), box-shadow var(--transition);
  cursor: text;
}

.product-search-bar:focus-within {
  border-color: var(--color-silver-light);
  box-shadow: 0 6px 28px rgba(26, 26, 28, 0.1);
}

.product-search__icon {
  flex-shrink: 0;
  display: flex;
  color: var(--color-silver);
  transition: color var(--transition);
}

.product-search-bar:focus-within .product-search__icon {
  color: var(--color-accent);
}

.product-search__input {
  flex: 1;
  min-width: 0;
  padding: 0.7rem 0;
  font-size: 0.9375rem;
  font-family: inherit;
  font-weight: 400;
  letter-spacing: 0.02em;
  border: none;
  background: transparent;
  color: var(--color-dark);
}

.product-search__input::placeholder {
  color: var(--color-silver);
  font-weight: 400;
}

.product-search__input:focus {
  outline: none;
}

.product-search__input::-webkit-search-cancel-button {
  -webkit-appearance: none;
}

.product-search__actions {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  flex-shrink: 0;
  padding-right: 0.15rem;
}

.product-search__submit {
  padding: 0.55rem 1.1rem;
  font-family: inherit;
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--color-bg);
  background: var(--color-dark);
  border: none;
  border-radius: calc(var(--radius-lg) - 4px);
  cursor: pointer;
  transition: background var(--transition), transform var(--transition);
}

.product-search__submit:hover {
  background: var(--color-dark-soft);
}

.product-search__submit:active {
  transform: scale(0.98);
}

.product-search__clear {
  padding: 0.55rem 0.85rem;
  font-family: inherit;
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
  background: transparent;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: color var(--transition), background var(--transition);
}

.product-search__clear:hover {
  color: var(--color-dark);
  background: var(--color-bg-alt);
}

.product-search-msg {
  margin-top: 0.85rem;
  max-width: 640px;
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--color-text-muted);
  letter-spacing: 0.02em;
}

@media (max-width: 520px) {
  .product-search-bar {
    flex-wrap: wrap;
    padding: 0.75rem 0.85rem;
    gap: 0.5rem;
  }

  .product-search__icon {
    order: 0;
  }

  .product-search__input {
    order: 1;
    flex: 1 1 100%;
    padding: 0.25rem 0 0.5rem;
    border-bottom: 1px solid var(--color-border);
  }

  .product-search__actions {
    order: 2;
    width: 100%;
    justify-content: flex-end;
    padding-right: 0;
  }

  .product-search__submit {
    flex: 1;
    max-width: 8rem;
  }
}

.product-grid-empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: 3rem 1.5rem;
  color: var(--color-silver);
  font-size: 0.95rem;
  background: var(--color-surface);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-lg);
}

.product-pagination {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.75rem 1rem;
  margin-top: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
}

.product-page-btn {
  padding: 0.5rem 1.25rem;
  font-size: 0.875rem;
  font-family: inherit;
  font-weight: 500;
  color: var(--color-dark-soft);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: border-color var(--transition), color var(--transition), background var(--transition);
}

.product-page-btn:hover:not(:disabled) {
  border-color: var(--color-dark);
  color: var(--color-dark);
}

.product-page-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.product-page-numbers {
  display: flex;
  gap: 0.5rem;
}

.product-page-num {
  min-width: 2.5rem;
  height: 2.5rem;
  padding: 0 0.5rem;
  font-size: 0.9rem;
  font-family: inherit;
  font-weight: 500;
  color: var(--color-text-muted);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}

.product-page-num:hover {
  border-color: var(--color-silver);
  color: var(--color-dark);
}

.product-page-num.is-active {
  background: var(--color-dark);
  border-color: var(--color-dark);
  color: var(--color-bg);
}

.product-grid-viewport {
  overflow: hidden;
  position: relative;
}

.product-grid {
  display: grid;
  /* 固定列数，避免搜索结果少时卡片被拉宽 */
  grid-template-columns: repeat(var(--product-cols, 4), minmax(0, 1fr));
  gap: 1.5rem;
  align-items: stretch;
  transition: opacity 0.32s ease, transform 0.32s ease;
  will-change: opacity, transform;
}

.product-grid--exit-left {
  opacity: 0;
  transform: translateX(-36px);
}

.product-grid--exit-right {
  opacity: 0;
  transform: translateX(36px);
}

.product-grid--enter-from-right {
  opacity: 0;
  transform: translateX(36px);
}

.product-grid--enter-from-left {
  opacity: 0;
  transform: translateX(-36px);
}

.product-grid--enter-from-right.product-grid--enter-active,
.product-grid--enter-from-left.product-grid--enter-active {
  opacity: 1;
  transform: translateX(0);
}

@media (prefers-reduced-motion: reduce) {
  .product-grid {
    transition: none;
  }
}

@media (max-width: 1024px) {
  .product-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 560px) {
  .product-grid {
    grid-template-columns: 1fr;
  }
}

.product-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2rem 1.75rem;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.product-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px var(--color-shadow);
  border-color: var(--color-silver-light);
}

/* 产品图：默认铺满（适合带背景实拍图）；抠图轴体见 --isolated */
.product-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  aspect-ratio: 1 / 1;
  margin-bottom: 1.5rem;
  background: linear-gradient(165deg, #dceef6 0%, #eef6fa 45%, #f5f2ec 100%);
  border-radius: var(--radius);
  overflow: hidden;
}

.product-photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center center;
  display: block;
}

/* 透明底抠图 PNG：在 .product-visual 上增加 class product-visual--isolated */
.product-visual--isolated {
  background: var(--color-bg);
}

.product-visual--isolated .product-photo {
  width: auto;
  height: auto;
  max-width: 78%;
  max-height: 82%;
  object-fit: contain;
  filter: drop-shadow(0 10px 20px rgba(26, 26, 28, 0.12));
}

.product-name {
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--color-dark);
  margin-bottom: 0.25rem;
}

.product-type {
  font-size: 0.8rem;
  color: var(--color-silver);
  letter-spacing: 0.05em;
  margin-bottom: 1.25rem;
}

.product-specs {
  flex: 1;
  margin-bottom: 1.5rem;
}

.product-specs div {
  display: flex;
  justify-content: space-between;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.875rem;
}

.product-specs dt {
  color: var(--color-text-muted);
}

.product-specs dd {
  font-weight: 500;
  color: var(--color-dark);
}

/* --- 按钮 --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  border-radius: var(--radius);
  border: none;
  cursor: pointer;
  transition: background var(--transition), color var(--transition),
    border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

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

.btn-outline:hover {
  background: var(--color-dark);
  color: var(--color-bg);
}

.btn-primary {
  background: var(--color-dark);
  color: var(--color-bg);
  width: 100%;
}

.btn-primary:hover {
  background: var(--color-dark-soft);
  box-shadow: 0 4px 16px var(--color-shadow-deep);
}

.btn-primary:active,
.btn-outline:active {
  transform: scale(0.98);
}

.btn-primary.clicked {
  animation: btn-pulse 0.4s ease;
}

@keyframes btn-pulse {
  0% { transform: scale(1); }
  50% { transform: scale(0.96); }
  100% { transform: scale(1); }
}

/* --- 驱动下载 --- */
.section-downloads {
  background: var(--color-surface);
}

.download-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}

.download-cards--single {
  max-width: 420px;
}

.download-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  background: var(--color-bg);
  transition: box-shadow var(--transition);
}

.download-card:hover {
  box-shadow: 0 8px 32px var(--color-shadow);
}

.download-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
}

.download-card-header h3 {
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--color-dark);
}

.version-badge {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  padding: 0.35em 0.75em;
  background: var(--color-dark);
  color: var(--color-bg);
  border-radius: 100px;
}

.download-meta {
  margin-bottom: 2rem;
}

.download-meta li {
  display: flex;
  justify-content: space-between;
  padding: 0.65rem 0;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.875rem;
}

.download-meta span {
  color: var(--color-text-muted);
}

.download-meta strong {
  color: var(--color-dark);
  font-weight: 500;
  word-break: break-word;
}

.download-picker-btn {
  width: 100%;
}

.download-picker-btn svg,
.download-web-link svg {
  flex-shrink: 0;
}

.download-web-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  width: 100%;
  text-decoration: none;
  margin-top: 0.25rem;
}

.version-badge--web {
  background: #2a5c8a;
}

/* 驱动版本选择弹窗 */
.download-version-modal {
  max-width: 440px;
}

.download-version-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.download-version-item {
  margin: 0;
}

.download-version-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.15rem;
  text-decoration: none;
  color: inherit;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
}

.download-version-link:hover {
  border-color: var(--color-silver-light);
  background: var(--color-surface);
  box-shadow: 0 4px 16px var(--color-shadow);
}

.download-version-link__main {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.download-version-link__ver {
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-dark);
  letter-spacing: 0.02em;
}

.download-version-link__meta {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.download-version-link__action {
  flex-shrink: 0;
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--color-dark-soft);
}

.download-version-link:hover .download-version-link__action {
  color: var(--color-dark);
}

.download-version-link.is-latest {
  border-color: var(--color-dark);
  background: var(--color-surface);
}

.download-version-link.is-latest .download-version-link__ver::after {
  content: "最新";
  margin-left: 0.5rem;
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--color-bg);
  background: var(--color-dark);
  padding: 0.15em 0.5em;
  border-radius: 100px;
  vertical-align: middle;
}

/* --- 公司地址 --- */
.section-location {
  background: var(--color-bg);
}

.location-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 2rem;
  align-items: start;
}

.location-map {
  min-width: 0;
}

.map-wrapper {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  aspect-ratio: 16 / 10;
  background: var(--color-bg-alt);
}

.company-map {
  width: 100%;
  height: 100%;
  min-height: 280px;
  z-index: 0;
}

.map-wrapper .leaflet-control-attribution {
  margin: 0;
  padding: 2px 6px;
  font-size: 0.65rem;
  background: rgba(255, 255, 255, 0.82);
  border-radius: 4px 0 0 0;
}

.map-wrapper .leaflet-popup-content .map-popup-area {
  display: inline-block;
  margin: 0.25rem 0;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.map-fallback {
  position: absolute;
  inset: 0;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  padding: 1.5rem;
  text-align: center;
  background: var(--color-bg-alt);
}

.map-fallback[hidden] {
  display: none;
}

.map-fallback__text {
  font-size: 0.95rem;
  color: var(--color-dark-soft);
  margin: 0;
}

.map-fallback__hint {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin: 0;
}

.map-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-top: 0.85rem;
}

.map-nav-btn {
  display: inline-flex;
  align-items: center;
  padding: 0.45rem 0.95rem;
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--color-dark-soft);
  text-decoration: none;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  transition: border-color var(--transition), color var(--transition), background var(--transition);
}

.map-nav-btn:hover {
  color: var(--color-dark);
  border-color: var(--color-silver-light);
  background: var(--color-bg);
}

.location-info {
  padding: 1rem 0;
}

.location-address {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  font-size: 1.05rem;
  color: var(--color-dark);
  line-height: 1.6;
  margin-bottom: 2rem;
}

.location-address svg {
  flex-shrink: 0;
  margin-top: 0.2rem;
  color: var(--color-silver);
}

.location-contacts {
  margin-bottom: 1.5rem;
}

.location-contacts li {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.65rem 0;
  font-size: 0.95rem;
}

.location-contacts svg {
  color: var(--color-silver);
  flex-shrink: 0;
}

.location-contacts a:hover {
  color: var(--color-dark);
}

.location-hours {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* --- 联系我们 --- */
.section-contact {
  background: var(--color-surface);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: start;
}

.contact-form {
  margin-top: 2rem;
}

.contact-form-embed {
  margin-top: 2rem;
}

.contact-form-embed-frame {
  width: 100%;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-bg);
}

.contact-form-embed-frame iframe {
  display: block;
  width: 100%;
  border: 0;
  min-height: 420px;
}

.contact-form-embed-script {
  width: 100%;
}

.contact-form-embed-actions {
  margin-top: 1.25rem;
}

.contact-form-embed-note {
  margin-top: 1rem;
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.contact-form-embed-note a {
  color: inherit;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.contact-form-embed-setup {
  padding: 1.25rem 1.5rem;
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-bg);
  color: var(--color-text-muted);
  font-size: 0.92rem;
  line-height: 1.6;
}

.contact-form-embed-setup p + p {
  margin-top: 0.5rem;
}

.contact-form-embed-setup code {
  font-size: 0.85em;
  color: var(--color-dark);
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  margin-bottom: 0.5rem;
  text-transform: uppercase;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.85rem 1rem;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  color: var(--color-dark);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  transition: border-color var(--transition), box-shadow var(--transition);
  resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-silver);
  box-shadow: 0 0 0 3px rgba(168, 169, 173, 0.2);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--color-silver-light);
}

.btn-submit {
  margin-top: 0.5rem;
  min-width: 160px;
  width: auto;
}

/* 社交媒体 */
.contact-aside {
  padding: clamp(2rem, 4vw, 3rem);
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
}

.contact-aside h3 {
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--color-dark);
  margin-bottom: 0.75rem;
}

.contact-aside p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-bottom: 2rem;
}

.social-links {
  display: flex;
  gap: 1rem;
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border: 1px solid var(--color-border);
  border-radius: 50%;
  color: var(--color-text-muted);
  transition: background var(--transition), color var(--transition), border-color var(--transition), transform var(--transition);
}

.social-link:hover {
  background: var(--color-dark);
  color: var(--color-bg);
  border-color: var(--color-dark);
  transform: translateY(-2px);
}

/* --- 页脚 --- */
.site-footer {
  padding: 2rem 0;
  background: var(--color-dark);
  color: var(--color-silver);
  text-align: center;
  font-size: 0.8rem;
  letter-spacing: 0.05em;
}

.site-footer__inner {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.site-footer__copy {
  margin: 0;
}

.site-footer__beian {
  margin: 0;
  font-size: 0.75rem;
  opacity: 0.85;
}

.site-footer__beian a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition), opacity var(--transition);
}

.site-footer__beian a:hover {
  color: var(--color-bg);
  opacity: 1;
}

/* --- 模态框 --- */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  background: rgba(26, 26, 28, 0.55);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition), visibility var(--transition);
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  position: relative;
  width: 100%;
  max-width: 560px;
  max-height: 88vh;
  overflow-x: hidden;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: 2.5rem 2rem 2rem;
  transform: translateY(20px) scale(0.97);
  transition: transform var(--transition);
  box-shadow: 0 24px 64px var(--color-shadow-deep);
}

.modal-overlay.active .modal {
  transform: translateY(0) scale(1);
}

.modal-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg);
  border: none;
  border-radius: 50%;
  font-size: 1.5rem;
  line-height: 1;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
}

.modal-close:hover {
  background: var(--color-dark);
  color: var(--color-bg);
}

.modal-title {
  font-size: 1.5rem;
  font-weight: 400;
  color: var(--color-dark);
  margin-bottom: 0.25rem;
  padding-right: 2rem;
}

.modal-subtitle {
  font-size: 0.85rem;
  color: var(--color-silver);
  letter-spacing: 0.05em;
  margin-bottom: 1.25rem;
}

.modal-gallery {
  margin-bottom: 1.5rem;
}

.modal-gallery__loading,
.modal-gallery__hint {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  text-align: center;
  padding: 1.25rem;
  background: var(--color-bg);
  border-radius: var(--radius);
}

.modal-gallery__list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.modal-gallery__item {
  margin: 0;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--color-border);
  background: var(--color-bg);
}

.modal-gallery__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  vertical-align: middle;
}

.modal-specs {
  display: grid;
  gap: 0;
}

.modal-specs div {
  display: flex;
  justify-content: space-between;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.9rem;
}

.modal-specs dt {
  color: var(--color-text-muted);
}

.modal-specs dd {
  font-weight: 500;
  color: var(--color-dark);
  text-align: right;
}

/* --- Toast 提示 --- */
.toast {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  z-index: 3000;
  padding: 1rem 2rem;
  background: var(--color-dark);
  color: var(--color-bg);
  font-size: 0.9rem;
  border-radius: var(--radius);
  box-shadow: 0 8px 32px var(--color-shadow-deep);
  opacity: 0;
  visibility: hidden;
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1),
    opacity 0.4s ease, visibility 0.4s ease;
  pointer-events: none;
  white-space: nowrap;
  max-width: 90vw;
  text-align: center;
}

.toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
  visibility: visible;
}

.toast--error {
  background: #7a2e2e;
}

.toast--long {
  white-space: normal;
  line-height: 1.55;
  max-width: min(440px, 90vw);
  pointer-events: auto;
}

.toast--error a {
  color: #fff;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.toast--error a:hover {
  opacity: 0.9;
}

/* --- 响应式 --- */
@media (max-width: 900px) {
  .about-grid,
  .detail-row,
  .detail-row--reverse,
  .location-grid {
    grid-template-columns: 1fr;
  }

  .detail-row--reverse .media-carousel,
  .detail-row--reverse .detail-row__text {
    order: unset;
  }

  .about-grid {
    align-items: start;
  }

  .about-content {
    height: auto;
  }

  .about-stats {
    margin-top: 2.5rem;
  }

  .about-photo {
    order: -1;
    aspect-ratio: 16 / 9;
  }
}

@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: rgba(247, 245, 240, 0.98);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    padding: 1rem 0;
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--transition), opacity var(--transition), visibility var(--transition);
  }

  .nav-menu.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-menu li {
    border-bottom: 1px solid var(--color-border);
  }

  .nav-menu .nav-link {
    display: block;
    padding: 1rem 2rem;
  }

  .about-stats {
    flex-wrap: wrap;
  }

}

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

  .download-cards {
    grid-template-columns: 1fr;
  }

  .toast {
    white-space: normal;
    font-size: 0.85rem;
  }
}