/* ==========================================================================
   思达普科技官网 · 基础样式：重置、排版、按钮、通用工具类、入场动画
   ========================================================================== */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-stack);
  font-size: 17px;
  font-weight: 400;
  line-height: 1.47;
  letter-spacing: -0.022em;
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: inherit;
}

ul,
ol {
  list-style: none;
}

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
}

/* ---- 可访问性 ---- */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

:focus-visible {
  outline: 2px solid var(--color-text-primary);
  outline-offset: 3px;
  border-radius: 4px;
}

.skip-link {
  position: absolute;
  top: -48px;
  left: 16px;
  z-index: 1100;
  display: inline-flex;
  align-items: center;
  padding: 8px 16px;
  border-radius: 980px;
  background-color: var(--color-accent);
  color: var(--color-text-inverse);
  font-size: 14px;
  text-decoration: none;
  transition: top 0.3s ease;
}

.skip-link:focus {
  top: 8px;
}

/* ---- 通用工具类 ---- */
.nowrap {
  white-space: nowrap;
}

.container {
  max-width: var(--content-max);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* ---- 按钮 ---- */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 36px;
  padding: 8px 18px;
  border: 1px solid transparent;
  border-radius: 980px;
  background-color: var(--color-accent);
  color: var(--color-text-inverse);
  font-size: 14px;
  text-decoration: none;
  touch-action: manipulation;
  transition: background-color 0.3s ease;
}

.button:hover {
  background-color: var(--color-accent-hover);
}

.button:active {
  background-color: var(--color-accent-active);
}

.button-secondary {
  background-color: transparent;
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.button-secondary:hover {
  background-color: color-mix(in srgb, var(--color-accent) 24%, transparent);
  color: var(--color-accent-hover);
}

.button-large {
  min-height: 44px;
  padding: 12px 26px;
  font-size: 16px;
}

.button-block {
  width: 100%;
}

/* ---- 小眉题（区块或文案顶部的分类标签） ---- */
.eyebrow {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--color-accent);
}

/* ---- 区块标题（首页产品区 / 详情页各小节） ---- */
.section-head {
  padding: 72px 24px 36px;
  text-align: center;
  scroll-margin-top: 56px;
}

.section-head .eyebrow {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--color-accent);
}

.section-head h2 {
  margin-top: 8px;
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 600;
  line-height: 1.15;
}

.section-head p {
  margin: 10px auto 0;
  max-width: 640px;
  font-size: 15px;
  color: var(--color-text-secondary);
}

/* ---- 入场动画（Intersection Observer 触发） ---- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out);
}

.reveal.is-active {
  opacity: 1;
  transform: none;
}

/* ---- 轻提示（加入购物袋等） ---- */
.toast {
  position: fixed;
  left: 50%;
  bottom: 32px;
  z-index: 1200;
  display: inline-flex;
  align-items: center;
  gap: 14px;
  max-width: calc(100vw - 48px);
  padding: 10px 12px 10px 20px;
  border-radius: 980px;
  background-color: rgba(29, 29, 31, 0.92);
  color: #FFFFFF;
  font-size: 14px;
  text-align: center;
  opacity: 0;
  transform: translate(-50%, 16px);
  /* 需要可点击：提示条内含"查看购物袋"动作按钮 */
  pointer-events: auto;
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.toast.is-visible {
  opacity: 1;
  transform: translate(-50%, 0);
}

.toast-action {
  flex: none;
  padding: 5px 14px;
  border: 0;
  border-radius: 980px;
  background-color: #FFFFFF;
  color: #1D1D1F;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.2s ease;
}

.toast-action:hover {
  opacity: 0.85;
}

/* ---- 无 JavaScript 兜底：内容直接可见 ---- */
.no-js .reveal {
  opacity: 1;
  transform: none;
}

/* ---- 仅支持悬停的设备启用悬停效果 ---- */
@media (hover: hover) {
  .button:hover {
    background-color: var(--color-accent-hover);
  }

  .button:active {
    background-color: var(--color-accent-active);
  }

  .button-secondary:hover {
    background-color: color-mix(in srgb, var(--color-accent) 24%, transparent);
    color: var(--color-accent-hover);
  }
}

/* ---- 减少动态效果偏好 ---- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* ==========================================================================
   图片智能自适应：比例不匹配时「完整显示 + 模糊同图填充背景」
   由 SIDAPU.smartImages() 检测后添加 .media-smart--contain
   ========================================================================== */

[data-smart-box] {
  position: relative;
  overflow: hidden;
}

.media-smart-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  filter: blur(28px) saturate(1.15) brightness(1.05);
  transform: scale(1.25);
  opacity: 0.95;
  pointer-events: none;
  z-index: 0;
}

.media-smart--contain img:not(.media-smart-bg) {
  position: relative;
  z-index: 1;
  object-fit: contain;
  background-color: rgba(255, 255, 255, 0.55);
  transition: object-fit 0.25s ease;
}

@media (prefers-reduced-motion: reduce) {
  .media-smart--contain img:not(.media-smart-bg) {
    transition: none;
  }
}

/* ==========================================================================
   点击查看大图（Lightbox）：详情页等图片点击后全屏预览原图
   ========================================================================== */

img[data-smart] {
  cursor: zoom-in;
}

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 1300;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 32px;
  background-color: rgba(0, 0, 0, 0.82);
  opacity: 0;
  visibility: hidden;
  cursor: zoom-out;
  transition: opacity 0.25s ease, visibility 0.25s ease;
}

.lightbox.is-open {
  opacity: 1;
  visibility: visible;
}

.lightbox-img {
  max-width: min(1200px, 92vw);
  max-height: 90vh;
  object-fit: contain;
  border-radius: 12px;
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.4);
  transform: scale(0.96);
  transition: transform 0.25s ease;
}

.lightbox.is-open .lightbox-img {
  transform: scale(1);
}

@media (prefers-reduced-motion: reduce) {
  .lightbox,
  .lightbox-img {
    transition: none;
  }
}