/* 首界官网 — 布局参考戴尔热卖促销页：清晰层级、大标题、卡片网格、强调价与 CTA */

:root {
  /* 主导航：105° V 形路径在 16×16 viewBox 内几何中心约 (50%, 68.4%)，旋转绕此点即为「中心旋转」 */
  --nav-chev-rotate-origin-y: 68.4%;
  --nav-chevron-gray: #6a6a6a;
  --main-nav-link: #5a5a5a;
  --brand-blue: #0076ce;
  --brand-blue-dark: #005a9e;
  --brand-blue-light: #e8f4fc;
  --text-primary: #1a1a1a;
  --text-secondary: #444444;
  --text-muted: #6e6e73;
  --border: #d2d2d7;
  --bg-page: #ffffff;
  --bg-section: #f5f5f7;
  /* 主导航下拉条目悬停：比 --bg-section 略深 */
  --nav-dropdown-item-hover: #e3e3e8;
  /* 宽屏下拉菜单一级条目：文字前空白（先归零对齐量，再使用此固定值） */
  --nav-dropdown-level1-pad-left: 9.7512px;
  /* 宽屏下拉菜单一级列宽：与「软件下载」一级列一致（14rem） */
  --nav-dropdown-first-col-width: 14rem;
  /* 宽屏：当前菜单按钮下的强调线（略浅灰） */
  --nav-menu-item-dropdown-bar: #6d6d72;
  --nav-menu-item-dropdown-bar-width: 3px;
  --bg-dark: #1d1d1f;
  --radius: 0;
  --radius-sm: 0;
  --radius-btn: 0;
  --shadow-card: 0 2px 12px rgba(0, 0, 0, 0.08);
  --shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.12);
  --font-stack: "Segoe UI", "Microsoft YaHei UI", "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", sans-serif;
  --fs-hero: clamp(2rem, 4vw, 3rem);
  --fs-h2: clamp(1.5rem, 2.5vw, 2rem);
  --fs-h3: 1.25rem;
  --fs-h4: 1rem;
  --fs-body: 1rem;
  --fs-small: 0.875rem;
  --fs-caption: 0.8125rem;
  --fs-lead: 1.125rem;
  --fs-product-title: 1.375rem;
  --fs-price: 1.5rem;
  --fw-regular: 400;
  --fw-medium: 500;
  --fw-semibold: 600;
  --fw-bold: 700;
  --lh-body: 1.5;
  --lh-heading: 1.25;
  --lh-hero: 1.15;
  --max-width: 1200px;
  --max-width-wide: 1400px;
  --header-h: 56px;
  --header-total: 104px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-stack);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  color: var(--text-primary);
  background: var(--bg-page);
  -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-stack);
  font-weight: var(--fw-semibold);
  line-height: var(--lh-heading);
  letter-spacing: -0.02em;
}

p {
  line-height: var(--lh-body);
}

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

a {
  color: var(--brand-blue);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* 勿用 left:-9999px，会撑开文档横向滚动区域；改为移出视口上方 */
.skip-link {
  position: absolute;
  left: 0.75rem;
  top: -120px;
  z-index: 9999;
  padding: 0.5rem 1rem;
  background: var(--brand-blue);
  color: #fff;
  transition: top 0.15s ease;
}

.skip-link:focus {
  top: 0.75rem;
  outline: 2px solid #fff;
  outline-offset: 2px;
}

/* —— 顶栏：戴尔式双行（上：Logo + 搜索 + 账户工具；下：主导航 + Premier） —— */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: #fff;
  border-bottom: 1px solid var(--border);
}

/* 宽屏下拉展开时：主内容区黑色半透明遮罩（顶栏与下拉面板保持在上层 z-index: 1000 / 1002） */
.nav-dropdown-backdrop {
  display: none;
}

@media (min-width: 901px) {
  .nav-dropdown-backdrop {
    display: block;
    position: fixed;
    inset: 0;
    z-index: 998;
    background: rgba(0, 0, 0, 0.45);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.2s ease, visibility 0.2s ease;
  }

  /* 悬停整条主导航即可保持遮罩，避免在菜单项间隙移动时闪黑 */
  body:has(.main-nav:hover) .nav-dropdown-backdrop,
  body:has(.main-nav__item--dropdown.is-dropdown-open) .nav-dropdown-backdrop {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }

  /* 与 .nav-dropdown--suppress-until-pointer 同步，避免仅收起面板而遮罩仍悬停显示 */
  body:has(.site-header.nav-dropdown--suppress-until-pointer) .nav-dropdown-backdrop {
    opacity: 0 !important;
    visibility: hidden !important;
    pointer-events: none !important;
  }
}

.header-top {
  border-bottom: none;
}

.header-top__inner {
  max-width: var(--max-width-wide);
  margin: 0 auto;
  padding: 0.6rem 1.25rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.header-bottom {
  position: relative;
  z-index: 1;
  background: #fff;
}

.header-bottom__inner {
  max-width: var(--max-width-wide);
  margin: 0 auto;
  padding: 0 2.25rem;
  min-height: 46px;
  display: flex;
  align-items: stretch;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

/* 桌面：底栏一行不换行；放不下时由 JS 加 .site-header--compact-nav 改汉堡，避免 926px 等宽度出现折行 */
@media (min-width: 901px) {
  .header-bottom__inner {
    flex-wrap: nowrap;
  }

  .header-bottom__actions {
    flex-shrink: 0;
  }
}

/* 901–1284：略收紧左右留白，多挤出空间给菜单（仍由 JS 决定是否汉堡） */
@media (min-width: 901px) and (max-width: 1284px) {
  .header-bottom__inner {
    padding-left: clamp(1rem, 2.5vw, 2.25rem);
    padding-right: clamp(1rem, 2.5vw, 2.25rem);
  }
}

/* 约 900–1100px：主导航与右侧按钮易横向顶死重叠——收窄文案/间距，并让主导航在剩余宽度内横向滚动 */
@media (min-width: 901px) and (max-width: 1100px) {
  .header-bottom__inner {
    gap: 0.35rem;
    padding-left: 0.65rem;
    padding-right: 0.65rem;
  }

  .header-bottom__actions {
    position: relative;
    z-index: 2;
    flex-shrink: 0;
    background: #fff;
    box-shadow: -10px 0 14px -6px rgba(255, 255, 255, 1);
  }

  .header-bottom__actions .nav-action__label--full {
    display: none;
  }

  .header-bottom__actions .nav-action__label--short {
    display: inline;
  }

  .main-nav__item--dropdown {
    --nav-item-pad-x: 0.2rem;
    --nav-trigger-pad-x: 0.28rem;
  }

  .main-nav__item--dropdown > a {
    font-size: 0.75rem;
  }

  .site-header:not(.site-header--compact-nav) .main-nav {
    flex: 1 1 0;
    min-width: 0;
    max-width: 100%;
    overflow-x: auto;
    overflow-y: visible;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior-x: contain;
    scrollbar-width: thin;
  }

  .site-header:not(.site-header--compact-nav) .main-nav::-webkit-scrollbar {
    height: 5px;
  }

  .site-header:not(.site-header--compact-nav) .main-nav::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, 0.2);
    border-radius: 4px;
  }
}

/* 兼容旧版单栏页面：仍可使用 .header-inner */
.header-inner {
  max-width: var(--max-width-wide);
  margin: 0 auto;
  padding: 0 1.25rem;
  min-height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.logo {
  display: inline-flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0.25rem 0.5rem;
  font-weight: var(--fw-bold);
  font-size: 1.125rem;
  color: var(--text-primary);
  text-decoration: none;
  letter-spacing: -0.02em;
  white-space: nowrap;
}

.logo__brand {
  color: var(--brand-blue);
  font-weight: var(--fw-bold);
}

.logo__sub {
  font-size: 0.8125rem;
  font-weight: var(--fw-semibold);
  color: var(--text-secondary);
  letter-spacing: 0.04em;
  text-transform: none;
}

.logo:hover {
  text-decoration: none;
}

.logo:hover .logo__brand {
  color: var(--brand-blue-dark);
}

.logo:hover .logo__sub {
  color: var(--text-secondary);
}

.logo--img {
  align-items: center;
  gap: 0.5rem;
  line-height: 1;
}

.logo--img img {
  display: block;
  height: 22px;
  width: auto;
  max-width: 150px;
  object-fit: contain;
  flex-shrink: 0;
}

.logo--img .logo__sub {
  font-family: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  font-size: 1.0625rem;
  font-weight: 200;
  font-synthesis: none;
  color: var(--text-secondary);
  letter-spacing: 0.04em;
  line-height: 1;
  white-space: nowrap;
}

.logo--img:hover img {
  opacity: 0.9;
}

.logo--img:hover .logo__sub {
  color: var(--text-primary);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.header-search {
  flex: 1;
  min-width: 120px;
  max-width: 560px;
  margin: 0 auto;
  display: flex;
  align-items: stretch;
  border: 1px solid #c8c8cd;
  border-radius: var(--radius-btn);
  overflow: hidden;
  background: #fff;
}

.header-search input[type="search"] {
  flex: 1;
  border: none;
  padding: 0.45rem 0.75rem;
  font-size: var(--fs-small);
  font-family: inherit;
  color: var(--text-primary);
  outline: none;
  min-width: 0;
}

.header-search input[type="search"]::placeholder {
  color: #86868b;
}

.header-search__btn {
  flex-shrink: 0;
  border: none;
  border-left: 1px solid #c8c8cd;
  background: #f5f5f7;
  padding: 0 1rem;
  cursor: pointer;
  font-size: 1rem;
  color: var(--text-secondary);
  border-radius: var(--radius-btn);
}

.header-search__btn:hover {
  background: #ebebed;
  color: var(--brand-blue);
}

.header-util {
  display: flex;
  align-items: center;
  gap: 0.75rem 1.25rem;
  flex-shrink: 0;
}

.header-util a,
.header-util__lang {
  font-size: var(--fs-small);
  font-weight: var(--fw-medium);
  color: var(--text-secondary);
  text-decoration: none;
  background: none;
  border: none;
  cursor: pointer;
  font-family: inherit;
  padding: 0.25rem 0;
}

.header-util a:hover,
.header-util__lang:hover {
  color: var(--brand-blue);
  text-decoration: none;
}

.header-util__cart {
  font-size: 1.1rem;
  line-height: 1;
}

.main-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: stretch;
  align-self: stretch;
  gap: 0.25rem 1.75rem;
  flex: 1 1 auto;
  min-width: 0;
  min-height: 46px;
}

@media (min-width: 901px) {
  .main-nav {
    gap: 0;
  }

  /* 展开态主导航不换行；极窄桌面见下方 max-width:1100px 段可横向滚动 */
  .site-header:not(.site-header--compact-nav) .main-nav {
    flex-wrap: nowrap;
    overflow-x: visible;
    overflow-y: visible;
  }
}

.main-nav__item--dropdown {
  position: relative;
  display: flex;
  align-items: stretch;
  transition: background-color 0.12s ease;
}

@media (min-width: 901px) {
  /* 原 flex gap 改到两侧 padding；随视口略收紧，避免无谓出现汉堡 */
  .main-nav__item--dropdown {
    --nav-item-pad-x: clamp(0.3rem, 0.85vw, 0.875rem);
    --nav-trigger-pad-x: clamp(0.38rem, 0.95vw, 1rem);
    padding: 0 var(--nav-item-pad-x);
    border-bottom: var(--nav-menu-item-dropdown-bar-width) solid transparent;
    box-sizing: border-box;
    flex: 0 0 auto;
  }
}

.main-nav__item--dropdown > a {
  display: inline-flex;
  align-items: center;
  align-self: stretch;
  gap: 0.24rem;
  line-height: 1;
  box-sizing: border-box;
  padding: 0.4rem 0.55rem;
  border-radius: var(--radius-btn);
}

@media (min-width: 901px) {
  .main-nav__item--dropdown > a {
    flex: 0 0 auto;
    min-width: max-content;
    width: auto;
    max-width: none;
    justify-content: flex-start;
    padding: 0 var(--nav-trigger-pad-x);
    min-height: 100%;
    border-radius: 0;
    font-size: clamp(0.75rem, 0.2vw + 0.74rem, calc(var(--fs-small) * 1.1));
  }
}

/* 下拉展开时：整格浅灰底（含项间缓冲带，撑满可点区域） */
.main-nav__item--dropdown:hover,
.main-nav__item--dropdown:focus-within,
.main-nav__item--dropdown.is-dropdown-open {
  background-color: var(--bg-section);
}

@media (min-width: 901px) {
  /* 仅当前菜单按钮宽度下的 3px 底边，非整行 header-bottom */
  .main-nav__item--dropdown:hover,
  .main-nav__item--dropdown:focus-within,
  .main-nav__item--dropdown.is-dropdown-open {
    border-bottom-color: var(--nav-menu-item-dropdown-bar);
  }
}

.main-nav__dropdown {
  --nav-dropdown-pad-x: 1.125rem;
  --nav-dropdown-pad-y: 0.75rem;
  position: absolute;
  top: 100%;
  /* 相对当前菜单项左缘贴齐；宽屏下再用 padding-left 把「字」推到与一级菜单首字同一垂线（见 @media min-width:901px） */
  left: 0;
  min-width: 288px;
  margin-top: 0;
  /* 上下无内边距，首/末条悬停时灰底贴齐面板上下缘 */
  padding: 0;
  border: 1px solid var(--border);
  border-top: none;
  border-radius: var(--radius-sm);
  background: #fff;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 0;
  text-align: left;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.16s ease, visibility 0.16s ease;
  pointer-events: none;
  z-index: 1002;
  backface-visibility: hidden;
}

@media (min-width: 901px) {
  /* 与主链留出 3px 间距（与下方 ::before 热区同高）；一级列宽固定为软件下载同级宽度 */
  .main-nav__dropdown {
    margin-top: 3px;
    width: var(--nav-dropdown-first-col-width);
    min-width: var(--nav-dropdown-first-col-width);
    max-width: var(--nav-dropdown-first-col-width);
    box-sizing: border-box;
  }
}

/* 宽屏下面板不加水平 padding，避免悬停条左侧留出白带；对齐量全部放在条目 a 的 padding-left（见下方 @media） */

/* 热区：填主链与面板之间的缝隙，避免指针移动时掉悬停 */
.main-nav__dropdown::before {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  top: -3px;
  height: 3px;
  background: transparent;
  pointer-events: auto;
}

.main-nav__item--dropdown:hover .main-nav__dropdown,
.main-nav__item--dropdown:focus-within .main-nav__dropdown,
.main-nav__item--dropdown.is-dropdown-open .main-nav__dropdown {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

/* 从外链新标签返回时 :hover / :focus-within 仍成立，仅靠 JS 去 class 无法收起；临时强制隐藏，直至下一次指针交互 */
.site-header.nav-dropdown--suppress-until-pointer .main-nav__item--dropdown .main-nav__dropdown {
  opacity: 0 !important;
  visibility: hidden !important;
  pointer-events: none !important;
}

.header-bottom__actions {
  display: flex;
  align-items: center;
  align-self: center;
  gap: 0.45rem;
  flex-shrink: 0;
}

/* 顶栏 BBS / 商城：对齐 Dell 商城顶栏 .mh-top-nav-button.mh-top-nav-no-child.first-level（见 https://www.dell.com/zh-cn/shop/scc/sc/servers 页内联样式） */
.header-bottom__actions .mh-top-nav-button.mh-top-nav-no-child.first-level {
  align-items: center;
  background-color: transparent;
  border: none;
  box-sizing: border-box;
  color: #636363;
  cursor: pointer;
  display: inline-flex;
  font-family: Roboto, "Microsoft Yahei", "微软雅黑", "Hiragino Sans GB", "STHeiti", "华文黑体", "STXihei", "华文细黑", SimHei, "黑体", Arial, Helvetica, sans-serif;
  font-size: 0.8em;
  font-weight: var(--fw-semibold);
  gap: 0.28rem;
  justify-content: center;
  line-height: 16px;
  padding: 10px 13px 11px;
  position: relative;
  text-decoration: none;
  white-space: nowrap;
  word-wrap: break-word;
  border-radius: 0;
  box-shadow: none;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.header-bottom__actions .mh-top-nav-button.mh-top-nav-no-child.first-level:hover {
  background: #f5f6f7;
  color: #0e0e0e;
  text-decoration: none;
}

.header-bottom__actions .mh-top-nav-button.mh-top-nav-no-child.first-level:focus-visible {
  outline: 1px solid #00468b;
  outline-offset: 0;
}

.nav-bbs-btn__icon {
  flex-shrink: 0;
  display: block;
  width: 13px;
  height: 13px;
  color: #0076ce;
}

.nav-shop-btn__icon {
  flex-shrink: 0;
  display: block;
  width: 13px;
  height: 13px;
  color: #d6001c;
}

.header-bottom__actions .nav-bbs-btn:hover .nav-bbs-btn__icon {
  color: #005ea3;
}

.header-bottom__actions .nav-shop-btn:hover .nav-shop-btn__icon {
  color: #b00018;
}

/* 顶栏 BBS / 商城图标（大于默认 13px） */
.header-bottom__actions .nav-bbs-btn__icon,
.header-bottom__actions .nav-shop-btn__icon {
  width: 18px;
  height: 18px;
}

/* BBS / 商城：短文案默认隐藏（桌面与较宽移动用完整文案） */
.header-bottom__actions .nav-action__label--short {
  display: none;
}

.main-nav a {
  color: var(--main-nav-link);
  font-size: calc(var(--fs-small) * 1.1);
  font-weight: var(--fw-medium);
  padding: 0.4rem 0;
  text-decoration: none;
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  gap: 0.2rem;
}

.main-nav a.main-nav__link--nova {
  font-weight: var(--fw-bold);
}

.main-nav a .nav-chev {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 15px;
  height: 15px;
  line-height: 0;
  flex-shrink: 0;
  margin-left: 0.1rem;
  color: var(--nav-chevron-gray);
  opacity: 1;
}

.main-nav a:hover .nav-chev,
.main-nav a.is-active .nav-chev {
  color: var(--nav-chevron-gray);
}

/* SVG 路径为对称 V 形，顶点处内角约 105°；旋转作用在 svg 上并按路径中心定位 */
.main-nav a .nav-chev__svg {
  display: block;
  width: 15px;
  height: 15px;
  transform-origin: 50% var(--nav-chev-rotate-origin-y);
  transition: transform 0.2s ease;
}

.main-nav__item--dropdown:hover > a .nav-chev__svg,
.main-nav__item--dropdown:focus-within > a .nav-chev__svg,
.main-nav__item--dropdown.is-dropdown-open > a .nav-chev__svg {
  transform: rotate(180deg);
}

@media (prefers-reduced-motion: reduce) {
  .main-nav a .nav-chev__svg {
    transition: none;
  }
}

.main-nav a:hover,
.main-nav a.is-active {
  color: var(--brand-blue);
  text-decoration: none;
}

.main-nav a.is-active {
  font-weight: var(--fw-semibold);
}

.main-nav a.main-nav__link--nova.is-active {
  font-weight: var(--fw-bold);
}

/* 下拉内链接必须纵向块级（覆盖上一段 .main-nav a 的 inline-flex + 不换行） */
.main-nav .main-nav__dropdown a {
  display: block;
  width: 100%;
  box-sizing: border-box;
  white-space: normal;
  text-align: left;
  padding: var(--nav-dropdown-pad-y) var(--nav-dropdown-pad-x);
  border-bottom: 1px solid var(--bg-section);
  line-height: var(--lh-body);
  transition: background-color 0.12s ease, color 0.12s ease;
}

@media (min-width: 901px) {
  /* 条目撑满面板；左内边距归零后统一为 --nav-dropdown-level1-pad-left */
  .main-nav .main-nav__dropdown a {
    padding-top: var(--nav-dropdown-pad-y);
    padding-bottom: var(--nav-dropdown-pad-y);
    padding-right: var(--nav-dropdown-pad-x);
    padding-left: var(--nav-dropdown-level1-pad-left);
  }
}

.main-nav .main-nav__dropdown a:last-child {
  border-bottom: none;
}

/* 下拉内：悬停 / 键盘聚焦时整行灰底（盖过 .main-nav a:hover 的蓝色字） */
.main-nav .main-nav__dropdown a:hover,
.main-nav .main-nav__dropdown a:focus-visible {
  background-color: var(--nav-dropdown-item-hover);
  color: var(--text-primary);
  text-decoration: none;
}

.main-nav .main-nav__dropdown a.is-active:hover,
.main-nav .main-nav__dropdown a.is-active:focus-visible {
  color: var(--brand-blue);
}

/* —— 软件下载 / 帮助教程：一级类目 + 右侧飞出列表（宽屏一级列宽见 --nav-dropdown-first-col-width） —— */

.main-nav__flyout-item {
  position: relative;
  border-bottom: 1px solid var(--bg-section);
}

.main-nav__flyout-item:last-child {
  border-bottom: none;
}

.main-nav .main-nav__dropdown .main-nav__flyout-trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  font-weight: var(--fw-medium);
  border-bottom: none;
}

.main-nav__flyout-chev {
  flex-shrink: 0;
  font-size: 1.1em;
  line-height: 1;
  color: var(--nav-chevron-gray);
  font-weight: var(--fw-regular);
}

.main-nav__flyout-panel {
  display: none;
  flex-direction: column;
  align-items: stretch;
}

.main-nav .main-nav__dropdown .main-nav__flyout-panel a.main-nav__flyout-more {
  font-size: var(--fs-caption);
  color: var(--brand-blue);
  border-bottom: none;
  margin-top: 0.15rem;
}

.main-nav .main-nav__dropdown .main-nav__flyout-panel a.main-nav__flyout-more:hover,
.main-nav .main-nav__dropdown .main-nav__flyout-panel a.main-nav__flyout-more:focus-visible {
  color: var(--brand-blue-dark);
  background-color: var(--nav-dropdown-item-hover);
}

@media (min-width: 901px) {
  .main-nav__flyout-panel {
    position: absolute;
    left: calc(100% - 1px);
    top: 0;
    min-width: 16.5rem;
    max-width: min(22rem, 85vw);
    margin-left: 0;
    padding: 0;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-card);
    z-index: 1003;
  }

  .main-nav__flyout-item:hover .main-nav__flyout-panel,
  .main-nav__flyout-item:focus-within .main-nav__flyout-panel {
    display: flex;
  }

  /* 右侧面板内链接：常规左右内边距即可（勿用一级对齐的大 padding-left） */
  .main-nav__dropdown--downloads .main-nav__flyout-panel a:not(.main-nav__flyout-more),
  .main-nav__dropdown--tutorials .main-nav__flyout-panel a:not(.main-nav__flyout-more) {
    padding-left: var(--nav-dropdown-pad-x);
    padding-right: var(--nav-dropdown-pad-x);
  }

  .main-nav__dropdown--downloads .main-nav__flyout-panel a.main-nav__flyout-more,
  .main-nav__dropdown--tutorials .main-nav__flyout-panel a.main-nav__flyout-more {
    padding-left: var(--nav-dropdown-pad-x);
    padding-right: var(--nav-dropdown-pad-x);
  }

  .main-nav__flyout-item:hover .main-nav__flyout-trigger,
  .main-nav__flyout-item:focus-within .main-nav__flyout-trigger {
    background-color: var(--nav-dropdown-item-hover);
    color: var(--text-primary);
  }
}

/* 宽屏但无悬停（触屏笔记本等）：不要在右侧依赖 :hover，改为类目下内嵌列表 */
@media (min-width: 901px) and (hover: none) {
  .main-nav__dropdown--downloads .main-nav__flyout-panel,
  .main-nav__dropdown--tutorials .main-nav__flyout-panel {
    display: flex;
    position: static;
    left: auto;
    top: auto;
    min-width: 0;
    max-width: none;
    margin: 0 0 0.25rem 0.35rem;
    padding: 0 0 0.35rem 0.75rem;
    border: none;
    border-left: 2px solid var(--border);
    border-radius: 0;
    box-shadow: none;
    z-index: auto;
    background: transparent;
  }

  .main-nav__dropdown--downloads .main-nav__flyout-panel a:not(.main-nav__flyout-more),
  .main-nav__dropdown--tutorials .main-nav__flyout-panel a:not(.main-nav__flyout-more) {
    padding: 0.45rem 0;
    font-size: var(--fs-small);
  }

  .main-nav__dropdown--downloads .main-nav__flyout-panel a.main-nav__flyout-more,
  .main-nav__dropdown--tutorials .main-nav__flyout-panel a.main-nav__flyout-more {
    padding: 0.45rem 0;
    font-size: var(--fs-caption);
  }

  .main-nav__dropdown--downloads .main-nav__flyout-panel a,
  .main-nav__dropdown--tutorials .main-nav__flyout-panel a {
    border-bottom: 1px solid var(--bg-section);
  }

  .main-nav__dropdown--downloads .main-nav__flyout-panel a:last-child,
  .main-nav__dropdown--tutorials .main-nav__flyout-panel a:last-child {
    border-bottom: none;
  }

  .main-nav__flyout-chev {
    display: none;
  }
}

@media (max-width: 900px) {
  /* 三级：默认收起，仅 .is-flyout-open（点击）展开，不因一级悬浮展开 */
  .main-nav__dropdown--downloads .main-nav__flyout-panel,
  .main-nav__dropdown--tutorials .main-nav__flyout-panel {
    display: none;
    padding: 0 0 0.35rem 0;
    border-left: 2px solid var(--border);
    margin: 0 0 0.25rem 0;
    box-sizing: border-box;
  }

  .main-nav__dropdown--downloads .main-nav__flyout-item.is-flyout-open .main-nav__flyout-panel,
  .main-nav__dropdown--tutorials .main-nav__flyout-item.is-flyout-open .main-nav__flyout-panel {
    display: flex;
    flex-direction: column;
  }

  .main-nav__dropdown--downloads .main-nav__flyout-panel a,
  .main-nav__dropdown--tutorials .main-nav__flyout-panel a {
    padding: 0.45rem 1.25rem;
    font-size: var(--fs-small);
    border-bottom: 1px solid var(--bg-section);
  }

  .main-nav__dropdown--downloads .main-nav__flyout-panel a:last-child,
  .main-nav__dropdown--tutorials .main-nav__flyout-panel a:last-child {
    border-bottom: none;
  }

  .main-nav__flyout-chev {
    display: none;
  }
}

.header-premier {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: var(--fs-small);
  font-weight: var(--fw-semibold);
  color: var(--brand-blue);
  text-decoration: none;
  white-space: nowrap;
}

.header-premier::before {
  content: "";
  width: 18px;
  height: 18px;
  background: var(--brand-blue);
  flex-shrink: 0;
  border-radius: var(--radius-btn);
}

.header-premier:hover {
  text-decoration: underline;
  color: var(--brand-blue-dark);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.icon-btn {
  background: none;
  border: none;
  padding: 0.4rem;
  cursor: pointer;
  color: var(--text-secondary);
  border-radius: var(--radius-btn);
}

.icon-btn:hover {
  background: var(--bg-section);
  color: var(--brand-blue);
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  padding: 0.5rem;
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
}

@media (max-width: 900px) {
  /* 首行：Logo 与 BBS / 商城 / 汉堡同排；加高顶行；按钮叠在首行右侧 */
  :root {
    --mobile-header-top-h: 3.75rem;
  }

  .header-top {
    min-height: var(--mobile-header-top-h);
  }

  .header-top__inner {
    min-height: var(--mobile-header-top-h);
    padding-top: 0.75rem;
    padding-bottom: 0.75rem;
    padding-right: clamp(9rem, 42vw, 13rem);
    box-sizing: border-box;
    align-items: center;
  }

  .header-bottom {
    position: static;
    min-height: 0;
    height: 0;
    overflow: visible;
  }

  .header-bottom__inner {
    align-items: center;
    padding: 0;
    min-height: 0;
    height: 0;
    overflow: visible;
  }

  .header-bottom__actions {
    position: absolute;
    top: 0;
    right: 1.25rem;
    left: auto;
    margin-left: 0;
    z-index: 5;
    height: var(--mobile-header-top-h);
    display: flex;
    align-items: center;
    flex-shrink: 0;
    gap: 0.35rem;
  }

  .menu-toggle {
    display: flex;
  }

  .header-search {
    order: 10;
    flex: 1 1 100%;
    max-width: none;
    margin: 0.5rem 0 0;
  }

  .main-nav {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    background: #fff;
    z-index: 999;
    gap: 0;
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-0.6rem);
    pointer-events: none;
    padding: 0;
    margin: 0;
    border: none;
    box-shadow: none;
    transition:
      max-height 0.45s cubic-bezier(0.2, 0.85, 0.32, 1),
      opacity 0.32s ease,
      transform 0.4s cubic-bezier(0.2, 0.85, 0.32, 1),
      visibility 0.32s ease,
      padding 0.35s ease,
      border-color 0.2s ease,
      box-shadow 0.35s ease;
  }

  .main-nav.is-open {
    max-height: min(92vh, 760px);
    overflow-x: hidden;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    pointer-events: auto;
    padding: 0.75rem 0 1rem;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-card);
  }

  .main-nav a {
    padding: 0.75rem 1.25rem;
    border-bottom: 1px solid var(--bg-section);
    box-sizing: border-box;
    display: flex;
    width: 100%;
    max-width: 100%;
    align-items: center;
  }

  .main-nav__item--dropdown > a {
    padding: 0.75rem 1.25rem;
    border-radius: 0;
    justify-content: space-between;
  }

  .main-nav__item--dropdown {
    display: block;
  }

  .main-nav__dropdown {
    position: static;
    top: auto;
    left: auto;
    margin-top: 0;
    opacity: 1;
    visibility: visible;
    transform: none;
    border: none;
    border-radius: 0;
    box-shadow: none;
    padding: 0;
    min-width: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    text-align: left;
    pointer-events: auto;
    transition: none;
  }

  /* 二级：仅点击展开（.is-dropdown-open），窄屏无悬停展开，避免触屏无法稳定查看 */
  .main-nav__item--dropdown.is-dropdown-open .main-nav__dropdown {
    display: flex;
  }

  /* 二级：相对一级左侧缩进 30px；与一级同高（上下 padding 一致） */
  .main-nav .main-nav__dropdown > a,
  .main-nav .main-nav__dropdown .main-nav__flyout-trigger {
    padding: 0.75rem 1.25rem 0.75rem 30px;
    border-bottom: none;
    box-sizing: border-box;
  }

  .main-nav .main-nav__dropdown > a:hover,
  .main-nav .main-nav__dropdown > a:focus-visible,
  .main-nav .main-nav__dropdown .main-nav__flyout-trigger:hover,
  .main-nav .main-nav__dropdown .main-nav__flyout-trigger:focus-visible {
    background-color: var(--nav-dropdown-item-hover);
  }

  .main-nav__dropdown::before {
    display: none;
  }

  .header-premier {
    display: none;
  }

  .header-inner .main-nav {
    top: var(--header-h);
  }
}

@media (max-width: 900px) and (prefers-reduced-motion: reduce) {
  .main-nav {
    transition: none;
  }
}

/* 宽屏但顶栏一行放不下主导航 + BBS/商城：JS 加 .site-header--compact-nav，主导航收为汉堡抽屉（不折行、不横向滚动） */
@media (min-width: 901px) {
  /*
   * 桌面 compact：必须与手机顶栏区分——保持「上行 Logo / 下行 BBS·商城·汉堡」双行，
   * 禁止沿用 max-width:900px 时 header-bottom 高度为 0、按钮叠到首行的布局。
   */
  .site-header--compact-nav .header-top {
    border-bottom: 1px solid var(--border);
  }

  .site-header--compact-nav .header-bottom {
    position: relative;
    height: auto;
    min-height: 0;
    overflow: visible;
  }

  .site-header--compact-nav .header-bottom__inner {
    position: relative;
    height: auto;
    min-height: 46px;
    padding-left: 2.25rem;
    padding-right: 2.25rem;
    box-sizing: border-box;
    justify-content: flex-end;
    align-items: center;
    flex-wrap: nowrap;
  }

  .site-header--compact-nav .header-bottom__actions {
    position: static;
    top: auto;
    right: auto;
    left: auto;
    height: auto;
    z-index: auto;
  }

  .site-header--compact-nav .menu-toggle {
    display: flex;
  }

  .site-header--compact-nav .main-nav {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    background: #fff;
    z-index: 999;
    gap: 0;
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-0.6rem);
    pointer-events: none;
    padding: 0;
    margin: 0;
    border: none;
    box-shadow: none;
    flex: none;
    min-height: 0;
    align-self: auto;
    transition:
      max-height 0.45s cubic-bezier(0.2, 0.85, 0.32, 1),
      opacity 0.32s ease,
      transform 0.4s cubic-bezier(0.2, 0.85, 0.32, 1),
      visibility 0.32s ease,
      padding 0.35s ease,
      border-color 0.2s ease,
      box-shadow 0.35s ease;
  }

  .site-header--compact-nav .main-nav.is-open {
    max-height: min(92vh, 760px);
    overflow-x: hidden;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    pointer-events: auto;
    padding: 0.75rem 0 1rem;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-card);
  }

  .site-header--compact-nav .main-nav a {
    padding: 0.75rem 1.25rem;
    border-bottom: 1px solid var(--bg-section);
    box-sizing: border-box;
    display: flex;
    width: 100%;
    max-width: 100%;
    align-items: center;
  }

  .site-header--compact-nav .main-nav__item--dropdown > a {
    padding: 0.75rem 1.25rem;
    border-radius: 0;
    justify-content: space-between;
  }

  .site-header--compact-nav .main-nav__item--dropdown {
    display: block;
  }

  .site-header--compact-nav .main-nav__dropdown {
    position: static;
    top: auto;
    left: auto;
    margin-top: 0;
    opacity: 1;
    visibility: visible;
    transform: none;
    border: none;
    border-radius: 0;
    box-shadow: none;
    padding: 0;
    min-width: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    text-align: left;
    pointer-events: auto;
    transition: none;
  }

  .site-header--compact-nav .main-nav__item--dropdown.is-dropdown-open .main-nav__dropdown {
    display: flex;
  }

  .site-header--compact-nav .main-nav .main-nav__dropdown > a,
  .site-header--compact-nav .main-nav .main-nav__dropdown .main-nav__flyout-trigger {
    padding: 0.75rem 1.25rem 0.75rem 30px;
    border-bottom: none;
    box-sizing: border-box;
  }

  .site-header--compact-nav .main-nav .main-nav__dropdown > a:hover,
  .site-header--compact-nav .main-nav .main-nav__dropdown > a:focus-visible,
  .site-header--compact-nav .main-nav .main-nav__dropdown .main-nav__flyout-trigger:hover,
  .site-header--compact-nav .main-nav .main-nav__dropdown .main-nav__flyout-trigger:focus-visible {
    background-color: var(--nav-dropdown-item-hover);
  }

  .site-header--compact-nav .main-nav__dropdown::before {
    display: none;
  }

  /* 下载/教程三级：与窄屏一致，点击展开，不用宽屏悬停右侧面板 */
  .site-header--compact-nav .main-nav__dropdown--downloads,
  .site-header--compact-nav .main-nav__dropdown--tutorials {
    min-width: 0;
  }

  .site-header--compact-nav .main-nav__flyout-item:hover .main-nav__flyout-panel,
  .site-header--compact-nav .main-nav__flyout-item:focus-within .main-nav__flyout-panel {
    display: none;
  }

  .site-header--compact-nav .main-nav__dropdown--downloads .main-nav__flyout-panel,
  .site-header--compact-nav .main-nav__dropdown--tutorials .main-nav__flyout-panel {
    display: none;
    position: static;
    left: auto;
    top: auto;
    min-width: 0;
    max-width: none;
    margin: 0 0 0.25rem 0;
    padding: 0 0 0.35rem 0;
    border: none;
    border-left: 2px solid var(--border);
    border-radius: 0;
    box-shadow: none;
    z-index: auto;
    background: transparent;
  }

  .site-header--compact-nav .main-nav__dropdown--downloads .main-nav__flyout-item.is-flyout-open .main-nav__flyout-panel,
  .site-header--compact-nav .main-nav__dropdown--tutorials .main-nav__flyout-item.is-flyout-open .main-nav__flyout-panel {
    display: flex;
    flex-direction: column;
  }

  .site-header--compact-nav .main-nav__dropdown--downloads .main-nav__flyout-panel a,
  .site-header--compact-nav .main-nav__dropdown--tutorials .main-nav__flyout-panel a {
    padding: 0.45rem 1.25rem;
    font-size: var(--fs-small);
    border-bottom: 1px solid var(--bg-section);
  }

  .site-header--compact-nav .main-nav__dropdown--downloads .main-nav__flyout-panel a:last-child,
  .site-header--compact-nav .main-nav__dropdown--tutorials .main-nav__flyout-panel a:last-child {
    border-bottom: none;
  }

  .site-header--compact-nav .main-nav__flyout-chev {
    display: none;
  }

  /* 覆盖 (min-width:901px) 与 (hover:none) 下对 flyout 的宽屏规则 */
  .site-header--compact-nav .main-nav__dropdown--downloads .main-nav__flyout-panel,
  .site-header--compact-nav .main-nav__dropdown--tutorials .main-nav__flyout-panel {
    margin: 0 0 0.25rem 0;
  }

  .site-header--compact-nav .main-nav__dropdown--downloads .main-nav__flyout-panel a:not(.main-nav__flyout-more),
  .site-header--compact-nav .main-nav__dropdown--tutorials .main-nav__flyout-panel a:not(.main-nav__flyout-more) {
    padding-left: 1.25rem;
    padding-right: 1.25rem;
  }

  .site-header--compact-nav .main-nav__dropdown--downloads .main-nav__flyout-panel a.main-nav__flyout-more,
  .site-header--compact-nav .main-nav__dropdown--tutorials .main-nav__flyout-panel a.main-nav__flyout-more {
    padding-left: 1.25rem;
    padding-right: 1.25rem;
  }
}

@media (min-width: 901px) and (prefers-reduced-motion: reduce) {
  .site-header--compact-nav .main-nav {
    transition: none;
  }
}

/* —— 促销条 —— */
.promo-bar {
  background: var(--brand-blue);
  color: #fff;
  text-align: center;
  font-size: var(--fs-small);
  padding: 0.5rem 1rem;
}

.promo-bar a {
  color: #fff;
  font-weight: var(--fw-semibold);
  text-decoration: underline;
}

/* —— 主内容区 —— */
main {
  min-height: 60vh;
}

.section {
  padding: 3rem 1.25rem;
}

.section--muted {
  background: var(--bg-section);
}

.section-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.75rem;
}

.section-head--stack {
  flex-direction: column;
  align-items: flex-start;
  gap: 0.5rem;
}

.section-head__desc {
  margin: 0;
  font-size: var(--fs-small);
  font-weight: var(--fw-regular);
  color: var(--text-secondary);
  line-height: 1.55;
  max-width: 42rem;
}

.section-head__desc a {
  font-weight: var(--fw-medium);
}

.section-title {
  margin: 0;
  font-size: var(--fs-h2);
  font-weight: var(--fw-semibold);
  letter-spacing: -0.02em;
}

.section-title--tight {
  margin-bottom: 0.5rem;
}

.link-all {
  font-size: var(--fs-small);
  font-weight: var(--fw-semibold);
  color: var(--brand-blue);
}

/* —— Hero 轮播（大图 + 文案，类似戴尔横幅） —— */
.hero {
  position: relative;
  background: linear-gradient(135deg, #0a1628 0%, #1a3a5c 50%, #0d2137 100%);
  color: #fff;
  overflow: hidden;
}

.hero-slides {
  position: relative;
  min-height: 420px;
}

.hero-slide {
  display: none;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: center;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 3rem 1.25rem 4rem;
  min-height: 420px;
}

.hero-slide.is-active {
  display: grid;
}

.hero-slide__text h1 {
  margin: 0 0 0.75rem;
  font-size: var(--fs-hero);
  font-weight: var(--fw-semibold);
  line-height: var(--lh-hero);
  letter-spacing: -0.02em;
}

.hero-slide__text .sub {
  font-size: var(--fs-lead);
  font-weight: var(--fw-regular);
  line-height: var(--lh-body);
  opacity: 0.92;
  margin: 0 0 1.5rem;
  max-width: 32ch;
}

.hero-slide__media {
  position: relative;
}

.hero-slide__media img {
  width: 100%;
  max-height: 340px;
  object-fit: contain;
  border-radius: var(--radius);
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.hero-slide.is-active .hero-slide__media img.is-loaded {
  opacity: 1;
  transform: translateY(0);
}

.hero-cta {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.65rem 1.35rem;
  min-height: 40px;
  font-size: var(--fs-small);
  font-weight: var(--fw-semibold);
  border-radius: var(--radius-btn);
  border: none;
  cursor: pointer;
  font-family: inherit;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
  box-sizing: border-box;
}

.btn--primary {
  background: #fff;
  color: var(--brand-blue-dark);
}

.btn--primary:hover {
  background: var(--brand-blue-light);
}

.btn--outline {
  background: transparent;
  color: #fff;
  border: 2px solid rgba(255, 255, 255, 0.6);
}

.btn--outline:hover {
  background: rgba(255, 255, 255, 0.12);
}

.btn--blue {
  background: var(--brand-blue);
  color: #fff;
}

.btn--blue:hover {
  background: var(--brand-blue-dark);
}

.btn--outline-dark {
  background: transparent;
  color: var(--brand-blue);
  border: 2px solid var(--brand-blue);
}

.btn--outline-dark:hover {
  background: var(--brand-blue-light);
}

/* 浅色首屏：黑底白字按钮（戴尔 XPS 横幅风格） */
.btn--hero-invert {
  background: #fff;
  color: #000;
  padding: 0.7rem 1.5rem;
  min-height: 44px;
  font-weight: var(--fw-semibold);
  border: none;
}

.btn--hero-invert:hover {
  background: #e8e8ed;
  color: #000;
  text-decoration: none;
}

.btn--hero-black {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.65rem 1.15rem;
  min-height: 44px;
  font-size: var(--fs-small);
  font-weight: var(--fw-semibold);
  font-family: inherit;
  background: #000;
  color: #fff;
  border: none;
  border-radius: var(--radius-btn);
  text-decoration: none;
  cursor: pointer;
  transition: background 0.2s;
}

.btn--hero-black:hover {
  background: #333;
  color: #fff;
  text-decoration: none;
}

.hero-cta-row {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55rem;
}

/* 首页首屏：每行左侧按钮蓝底白字（右侧仍为黑底按钮） */
.hero--home .hero-cta-row .btn--hero-black {
  transition: none;
}

.hero--home .hero-cta-row > .btn--hero-black:first-of-type {
  background: var(--brand-blue);
  color: #fff;
}

.hero--home .hero-cta-row > .btn--hero-black:first-of-type:hover {
  background: var(--brand-blue-dark);
  color: #fff;
}

/* —— 首页 Hero：浅灰蓝抽象底 + 左文案 + 右产品图 + 两侧箭头 + 底中指示条 —— */
.hero--home {
  position: relative;
  background: #cfd8e4;
  color: #000;
  overflow: hidden;
}

.hero--home::before,
.hero--home::after {
  display: none;
}

.hero--home .hero-slides {
  position: relative;
  z-index: 1;
  min-height: clamp(400px, 62vh, 580px);
  width: 100%;
  max-width: none;
  margin-left: auto;
  margin-right: auto;
  box-sizing: border-box;
}

.hero--home .hero-slide {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  align-items: center;
  box-sizing: border-box;
  width: 100%;
  max-width: none;
  margin: 0;
  padding: clamp(2rem, 4vw, 3.5rem) clamp(1.25rem, 4vw, 4.5rem) 3rem;
  min-height: clamp(400px, 62vh, 580px);
  background-size: cover;
  background-position: 50% 50%;
  background-repeat: no-repeat;
  background-origin: border-box;
  background-clip: border-box;
  position: absolute;
  inset: 0;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.5s ease, visibility 0.5s ease;
  pointer-events: none;
  z-index: 0;
}

.hero--home .hero-slide.is-active {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  z-index: 1;
}

.hero--home .hero-slide--bg1 {
  background-image: url("../image/index001.png");
}

.hero--home .hero-slide--bg2 {
  background-image: url("../image/index002.png");
}

.hero--home .hero-slide--bg3 {
  background-image: url("../image/index003.png");
}

/* 桌面端三张首屏底图：焦点略偏右，与窄屏裁切「中间偏右」一致 */
.hero--home .hero-slide--bg1,
.hero--home .hero-slide--bg2,
.hero--home .hero-slide--bg3 {
  background-position: 62% 50%;
}

.hero--home .hero-slide--product-xinghe {
  background-image: url("../image/xinghe001.png");
}

.hero--home .hero-slide--product-keyboard {
  background-image: url("../image/linglong001.png");
}

/* 桌面端用底图；移动端用 .hero-slide__media 内图片单独展示 */
.hero--home .hero-slide__media {
  display: none;
}

.hero--home .hero-slide::before {
  display: none;
}

.hero-slide__shell {
  display: contents;
}

.hero--home .hero-slide__left {
  position: relative;
  z-index: 1;
  background: transparent;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 0.5rem 0 0;
  box-sizing: border-box;
}

.hero-slide__left-inner {
  max-width: 34rem;
}

/* 首屏文案随底图亮度切换（无衬底色，仅靠字色 + 轻微描影保证可读） */
.hero--home .hero-slide.hero-tone--dark .hero-eyebrow {
  color: rgba(248, 250, 252, 0.96);
  text-shadow: 0 1px 8px rgba(0, 0, 0, 0.55), 0 0 1px rgba(0, 0, 0, 0.8);
}

.hero--home .hero-slide.hero-tone--dark .hero-slide__left h1 {
  color: #fff;
  text-shadow: 0 2px 14px rgba(0, 0, 0, 0.55), 0 1px 4px rgba(0, 0, 0, 0.85);
}

.hero--home .hero-slide.hero-tone--dark .hero-slide__left .sub {
  color: rgba(255, 255, 255, 0.92);
  text-shadow: 0 1px 10px rgba(0, 0, 0, 0.5), 0 0 1px rgba(0, 0, 0, 0.75);
}

.hero--home .hero-slide.hero-tone--dark .btn--hero-black {
  background: #fff;
  color: #111;
}

.hero--home .hero-slide.hero-tone--dark .btn--hero-black:hover {
  background: #e8e8ed;
  color: #000;
}

.hero--home .hero-slide.hero-tone--light .hero-eyebrow {
  color: #2d2d2d;
  text-shadow: 0 1px 2px rgba(255, 255, 255, 0.9), 0 0 10px rgba(255, 255, 255, 0.65);
}

.hero--home .hero-slide.hero-tone--light .hero-slide__left h1 {
  color: #0a0a0a;
  text-shadow: 0 1px 3px rgba(255, 255, 255, 0.95), 0 0 12px rgba(255, 255, 255, 0.55);
}

.hero--home .hero-slide.hero-tone--light .hero-slide__left .sub {
  color: #252525;
  text-shadow: 0 1px 2px rgba(255, 255, 255, 0.85), 0 0 8px rgba(255, 255, 255, 0.45);
}

.hero--home .hero-slide.hero-tone--light .btn--hero-black {
  background: #000;
  color: #fff;
}

.hero--home .hero-slide.hero-tone--light .btn--hero-black:hover {
  background: #333;
  color: #fff;
}

.hero--home .hero-slide.hero-tone--dark .hero-cta-row > .btn--hero-black:first-of-type,
.hero--home .hero-slide.hero-tone--light .hero-cta-row > .btn--hero-black:first-of-type {
  background: var(--brand-blue);
  color: #fff;
}

.hero--home .hero-slide.hero-tone--dark .hero-cta-row > .btn--hero-black:first-of-type:hover,
.hero--home .hero-slide.hero-tone--light .hero-cta-row > .btn--hero-black:first-of-type:hover {
  background: var(--brand-blue-dark);
  color: #fff;
}

.hero-eyebrow {
  margin: 0 0 0.65rem;
  font-size: var(--fs-small);
  font-weight: var(--fw-medium);
  color: #3a3a3a;
  letter-spacing: 0.06em;
  line-height: var(--lh-body);
}

.hero--home .hero-eyebrow {
  letter-spacing: 0.2em;
}

.hero--home .hero-slide__left h1 {
  margin: 0 0 0.85rem;
  font-size: clamp(1.75rem, 3.4vw, 2.625rem);
  font-weight: var(--fw-semibold);
  line-height: 1.15;
  letter-spacing: 0.03em;
  color: #000;
}

.hero--home .hero-slide__left .sub {
  font-size: var(--fs-lead);
  font-weight: var(--fw-regular);
  color: #444;
  max-width: 42ch;
  margin: 0 0 1.5rem;
  opacity: 1;
}

/* 首页轮播两侧箭头：高细条、无框线、半透底、白粗箭头（样式见文末 .hero--home .hero-edge 覆盖） */
.hero-edge--prev {
  left: 0;
}

.hero-edge--next {
  right: 0;
}

.hero--home .hero-dots {
  display: flex;
  position: absolute;
  bottom: 1.25rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 4;
  gap: 0.4rem;
}

.hero--home .hero-dots button {
  width: 32px;
  height: 5px;
  padding: 0;
  border: none;
  border-radius: var(--radius-btn);
  background: #a8b0bc;
  cursor: pointer;
  transition: background 0.2s, width 0.2s;
}

.hero--home .hero-dots button.is-active {
  background: #000;
  width: 36px;
}

/* 包裹圆点与箭头；桌面端「拆盒」以保持原有绝对定位逻辑 */
.hero-bottom-nav {
  display: contents;
}

.hero-arrows {
  display: contents;
}

.hero-toolbar {
  display: none;
}

.hero-counter,
.hero-pause {
  display: none;
}

@media (prefers-reduced-motion: reduce) {
  .hero--home .hero-slide {
    transition: none;
  }
}

/* 窄屏：当前屏用文档流撑开高度，避免固定 min-height + 绝对铺满导致按钮被父级 overflow 裁掉；非激活屏不占高度 */
@media (max-width: 900px) {
  .hero--home {
    display: flex;
    flex-direction: column;
    padding-bottom: env(safe-area-inset-bottom, 0);
    background: #1a2736;
    /* 覆盖桌面 overflow:hidden，否则按钮区易被裁切 */
    overflow-x: hidden;
    overflow-y: visible;
    min-height: 0;
  }

  .hero--home .hero-slides {
    position: relative;
    flex: 0 0 auto;
    width: 100%;
    min-height: 0;
    isolation: isolate;
  }

  /* 非激活：不占布局高度，避免三屏总高度叠加 */
  .hero--home .hero-slide {
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: stretch;
    position: absolute;
    left: 0;
    right: 0;
    top: 0;
    width: 100%;
    height: 0;
    margin: 0;
    padding: 0;
    overflow: hidden;
    box-sizing: border-box;
    min-height: 0 !important;
    background-image: none !important;
    background-color: #1a2736;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    z-index: 0;
    transition: opacity 0.48s ease;
  }

  /* 仅当前屏参与文档流高度，文案+按钮随内容增高，小屏/横屏也不被裁切 */
  .hero--home .hero-slide.is-active {
    position: relative;
    top: auto;
    left: auto;
    right: auto;
    height: auto;
    overflow: visible;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    z-index: 2;
    padding: 0 0 30px;
  }

  /* JS 测量三张幻灯片后取最高高度，固定 .hero-slides 高度，切换时不再伸缩 */
  .hero--home.hero--home--mobile-fixed-h .hero-slides {
    min-height: var(--hero-home-mobile-h);
    height: var(--hero-home-mobile-h);
  }

  .hero--home.hero--home--mobile-fixed-h .hero-slide.is-active {
    height: 100%;
    min-height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    box-sizing: border-box;
  }

  .hero--home .hero-slide__media {
    display: block;
    width: 100%;
    flex-shrink: 0;
    overflow: hidden;
    padding-top: 0;
    /* 限制头图占用，为标题与三颗按钮留出稳定空间 */
    max-height: min(38vh, 260px);
  }

  /* 可视区对应底图水平 30%～80%：显示宽为原图 50%，故 img 宽 200%、左移 60%（相对容器） */
  .hero--home .hero-slide__media img {
    width: 100%;
    max-width: none;
    height: min(38vh, 260px);
    object-fit: cover;
    object-position: 62% 42%;
    display: block;
    margin-left: 0;
    border-radius: 0;
    box-shadow: 0 8px 28px rgba(0, 0, 0, 0.14);
  }

  .hero--home .hero-slide__left {
    justify-content: flex-start;
    width: 100%;
    max-width: none;
    margin: 0;
    padding: 0;
  }

  .hero--home .hero-slide__left-inner {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    max-width: none;
    width: 100%;
    padding-left: 5%;
    padding-right: 5%;
    padding-top: 0.5rem;
    box-sizing: border-box;
  }

  /* 文案区随内容增高，避免 min-height 过高把按钮挤出可视区被 overflow 裁掉 */
  .hero--home .hero-slide__copy {
    flex: 0 0 auto;
    min-height: 0;
    display: flex;
    flex-direction: column;
    box-sizing: border-box;
  }

  .hero--home .hero-slide__left .sub {
    margin-bottom: 0.6rem;
  }

  .hero--home .hero-slide__copy .hero-eyebrow,
  .hero--home .hero-slide__copy h1,
  .hero--home .hero-slide__copy .sub {
    padding-left: 1.125rem;
  }

  .hero--home .hero-cta-row {
    flex-direction: column;
    align-items: stretch;
    width: 100%;
    gap: 0.5rem;
    flex-shrink: 0;
  }

  .hero--home .hero-cta-row .btn--hero-black {
    width: 100%;
    justify-content: center;
    box-sizing: border-box;
  }

  /* 接在幻灯片下方：与上方最后一枚按钮的间距由 .hero-slide 的 padding-bottom:30px 形成 */
  .hero-bottom-nav {
    display: block;
    position: relative;
    left: auto;
    right: auto;
    top: auto;
    bottom: auto;
    flex: 0 0 auto;
    z-index: 6;
    width: 100%;
    min-height: 48px;
    padding: 0.4rem 0.6rem calc(0.45rem + env(safe-area-inset-bottom, 0));
    box-sizing: border-box;
    background: linear-gradient(180deg, rgba(26, 39, 54, 0.35) 0%, rgba(26, 39, 54, 0.92) 100%);
    pointer-events: none;
  }

  .hero-bottom-nav .hero-dots,
  .hero-bottom-nav .hero-arrows {
    pointer-events: auto;
  }

  /* 指示条在底栏内水平居中；箭头靠右，二者垂直居中 */
  .hero-bottom-nav .hero-dots {
    position: absolute;
    left: 50%;
    top: 50%;
    bottom: auto;
    transform: translate(-50%, -50%);
    margin: 0;
  }

  .hero-arrows {
    position: absolute;
    right: 0.6rem;
    top: 50%;
    bottom: auto;
    transform: translateY(-50%);
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 0.35rem;
  }

  /* 右下：扁宽条外框 + 细线箭头 */
  .hero--home .hero-bottom-nav .hero-edge {
    position: relative;
    top: auto;
    left: auto;
    right: auto;
    transform: none;
    width: 40px;
    height: 26px;
    border-radius: 5px;
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.4);
    box-shadow: 0 1px 8px rgba(0, 0, 0, 0.2);
  }

  .hero--home .hero-bottom-nav .hero-edge:hover,
  .hero--home .hero-bottom-nav .hero-edge:focus-visible {
    background: rgba(255, 255, 255, 0.22);
  }

  .hero--home .hero-bottom-nav .hero-edge::before {
    width: 7px;
    height: 7px;
    border-width: 0 0 2px 2px;
    border-color: #fff;
  }

  .hero--home .hero-bottom-nav .hero-edge--next::before {
    border-width: 0 2px 2px 0;
  }

  .hero--home .hero-bottom-nav .hero-edge--prev::before {
    margin-left: 0;
  }

  .hero--home .hero-bottom-nav .hero-edge--next::before {
    margin-right: 0;
  }
}

/* 移动顶栏 BBS / 商城：随宽度缩短文案，避免与 Logo 重叠（需配合 HTML 双段文案） */
@media (max-width: 900px) and (min-width: 480px) {
  .header-bottom__actions .nav-action__label--full {
    display: inline;
  }
  .header-bottom__actions .nav-action__label--short {
    display: none;
  }
}

@media (max-width: 479px) {
  .header-bottom__actions .nav-action__label--full {
    display: none;
  }
  .header-bottom__actions .nav-action__label--short {
    display: inline;
  }
  .header-top__inner {
    padding-right: clamp(7rem, 52vw, 11rem);
  }
  /* 与右侧按钮争宽时隐藏 Logo 副标「FIRST ARPC」 */
  .header-top .logo--img .logo__sub {
    display: none;
  }
  .header-bottom__actions .nav-bbs-btn__icon,
  .header-bottom__actions .nav-shop-btn__icon {
    width: 20px;
    height: 20px;
  }
}

@media (max-width: 380px) {
  .header-bottom__actions .nav-action__label--full,
  .header-bottom__actions .nav-action__label--short {
    display: none !important;
  }
  .header-bottom__actions .mh-top-nav-button.mh-top-nav-no-child.first-level {
    padding: 11px 12px;
    min-width: 3rem;
    min-height: 3rem;
    justify-content: center;
    box-sizing: border-box;
  }
  .header-bottom__actions .mh-top-nav-button.mh-top-nav-no-child.first-level .nav-bbs-btn__icon,
  .header-bottom__actions .mh-top-nav-button.mh-top-nav-no-child.first-level .nav-shop-btn__icon {
    display: block;
    flex-shrink: 0;
  }
  /* 纯图标模式：图标再放大一档 */
  .header-bottom__actions .nav-bbs-btn__icon,
  .header-bottom__actions .nav-shop-btn__icon {
    width: 24px;
    height: 24px;
  }
  .header-top__inner {
    padding-right: clamp(5.25rem, 58vw, 8rem);
  }
}

/* —— 首页：解决方案分类卡片（黑标 + 底图） —— */
.category-strip {
  padding: 1.25rem 1.25rem 2rem;
  background: #fff;
  border-bottom: 1px solid var(--border);
}

.category-strip__inner {
  max-width: var(--max-width-wide);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}

.category-card {
  position: relative;
  display: block;
  min-height: 168px;
  overflow: hidden;
  border-radius: var(--radius-btn);
  border: 1px solid var(--border);
  text-decoration: none;
  color: inherit;
  background: var(--bg-section);
}

.category-card:hover {
  box-shadow: var(--shadow-hover);
  text-decoration: none;
}

.category-card__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  background-size: cover;
  background-position: center;
  transition: transform 0.4s ease;
}

.category-card:hover .category-card__bg {
  transform: scale(1.06);
}

.category-card__tag {
  position: absolute;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 2;
  background: #000;
  color: #fff;
  font-size: var(--fs-small);
  font-weight: var(--fw-semibold);
  padding: 0.4rem 0.65rem;
  line-height: 1.2;
  border-radius: var(--radius-btn);
}

@media (max-width: 640px) {
  .category-strip__inner {
    grid-template-columns: repeat(2, 1fr);
  }

  .promo-grid__inner {
    grid-template-columns: 1fr;
  }
}

/* —— 首页：四列促销文案（戴尔首屏下方） —— */
.promo-grid {
  background: #fff;
  border-bottom: 1px solid var(--border);
  padding: 1.5rem 1.25rem 1.75rem;
}

.promo-grid__inner {
  max-width: var(--max-width-wide);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem 1.5rem;
}

.promo-grid__cell {
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.promo-grid__cell h3 {
  margin: 0 0 0.45rem;
  font-size: var(--fs-body);
  font-weight: var(--fw-semibold);
  color: #000;
  line-height: var(--lh-heading);
}

.promo-grid__cell p {
  flex: 1 1 auto;
  margin: 0 0 0.5rem;
  font-size: var(--fs-small);
  color: var(--text-secondary);
  line-height: 1.55;
}

.promo-grid__cell a {
  font-size: var(--fs-small);
  font-weight: var(--fw-semibold);
  text-decoration: none;
}

.promo-grid__cell a:hover {
  text-decoration: underline;
}

.promo-grid__cell-brand {
  margin: 0 0 0.5rem;
  min-height: 48px;
  display: flex;
  align-items: center;
}

.promo-grid__cell-brand img {
  max-height: 48px;
  width: auto;
  max-width: 100%;
  object-fit: contain;
  display: block;
}

@media (max-width: 900px) {
  .promo-grid__inner {
    grid-template-columns: repeat(2, 1fr);
  }
}

.hero-dots {
  position: absolute;
  bottom: 1.25rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 0.5rem;
  z-index: 2;
}

.hero-dots button {
  width: 24px;
  height: 4px;
  border-radius: var(--radius-btn);
  border: none;
  background: rgba(255, 255, 255, 0.35);
  cursor: pointer;
  padding: 0;
}

.hero-dots button.is-active {
  background: #fff;
  width: 32px;
}

.hero-prev,
.hero-next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 2;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-btn);
  border: 1px solid rgba(255, 255, 255, 0.35);
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  font-size: 1.25rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-prev:hover,
.hero-next:hover {
  background: rgba(255, 255, 255, 0.28);
}

.hero-prev {
  left: 1rem;
}

.hero-next {
  right: 1rem;
}

/* 首页第一屏：高细竖条、无描边、半透暗底、白色粗箭头 */
.hero--home .hero-edge {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 4;
  width: 26px;
  height: 118px;
  padding: 0;
  margin: 0;
  border: none;
  background: rgba(0, 0, 0, 0.28);
  box-shadow: none;
  border-radius: 0;
  color: transparent;
  font-size: 0;
  line-height: 0;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s ease;
}

.hero--home .hero-edge:hover,
.hero--home .hero-edge:focus-visible {
  background: rgba(0, 0, 0, 0.42);
}

.hero--home .hero-edge:focus-visible {
  outline: 2px solid rgba(255, 255, 255, 0.45);
  outline-offset: 2px;
}

.hero--home .hero-edge::before {
  content: '';
  display: block;
  width: 11px;
  height: 11px;
  border-style: solid;
  border-color: #fff;
  flex-shrink: 0;
  box-sizing: border-box;
}

.hero--home .hero-edge--prev::before {
  border-width: 0 0 4px 4px;
  transform: rotate(45deg);
  margin-left: 2px;
}

.hero--home .hero-edge--next::before {
  border-width: 0 4px 4px 0;
  transform: rotate(-45deg);
  margin-right: 2px;
}

.hero--home .hero-edge.hero-prev {
  left: 0;
}

.hero--home .hero-edge.hero-next {
  right: 0;
}

@media (max-width: 768px) {
  .hero-slide {
    grid-template-columns: 1fr;
    min-height: auto;
    padding-bottom: 5rem;
  }

  .hero-slide__media {
    order: -1;
  }

  .hero-prev,
  .hero-next {
    display: none;
  }

  .hero--home .hero-prev,
  .hero--home .hero-next {
    display: flex;
  }
}

/* —— 快捷入口标签 —— */
.pill-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2rem;
}

.pill-tabs a,
.pill-tabs button.pill-tabs__link {
  padding: 0.5rem 1rem;
  border-radius: var(--radius-btn);
  font-size: var(--fs-small);
  font-weight: var(--fw-medium);
  background: #fff;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  text-decoration: none;
  line-height: var(--lh-body);
}

.pill-tabs button.pill-tabs__link {
  appearance: none;
  font: inherit;
  margin: 0;
  cursor: pointer;
  text-align: left;
}

.pill-tabs a:hover,
.pill-tabs a.is-active,
.pill-tabs button.pill-tabs__link:hover,
.pill-tabs button.pill-tabs__link.is-active {
  border-color: var(--brand-blue);
  color: var(--brand-blue);
  background: var(--brand-blue-light);
}

/* 电商频道：京东 / 小米有品 品牌色与标识 */
.pill-tabs--shop-brands {
  align-items: center;
}

.pill-tabs--shop-brands .pill-tabs__link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.45rem 0.95rem 0.45rem 0.65rem;
  transition:
    border-color 0.25s ease,
    color 0.25s ease,
    background 0.25s ease,
    transform 0.2s cubic-bezier(0.22, 1, 0.36, 1);
}

.pill-tabs--shop-brands .pill-tabs__brand-img {
  flex-shrink: 0;
  display: block;
  height: 26px;
  width: auto;
}

.pill-tabs--shop-brands .pill-tabs__brand-img--mi {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2.5rem;
  height: 26px;
  padding: 0 0.35rem;
  box-sizing: border-box;
  font-size: 0.8125rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  line-height: 1;
  color: #ff6900;
  background: linear-gradient(145deg, rgba(255, 105, 0, 0.12) 0%, rgba(255, 105, 0, 0.06) 100%);
  border: 1px solid rgba(255, 105, 0, 0.35);
  border-radius: 6px;
}

.pill-tabs--shop-brands .pill-tabs__link--youpin.is-active .pill-tabs__brand-img--mi {
  color: #fff;
  background: #ff6900;
  border-color: #ff6900;
}

.pill-tabs--shop-brands .pill-tabs__brand-label {
  font-size: var(--fs-caption);
  font-weight: var(--fw-semibold);
}

.pill-tabs--shop-brands .pill-tabs__link--jd.is-active {
  border-color: #e4393c;
  color: #a82d30;
  background: rgba(228, 57, 60, 0.09);
}

.pill-tabs--shop-brands .pill-tabs__link--youpin.is-active {
  border-color: #ff6900;
  color: #b35500;
  background: rgba(255, 105, 0, 0.1);
}

.pill-tabs--shop-brands .pill-tabs__link--jd:hover:not(.is-active),
.pill-tabs--shop-brands .pill-tabs__link--youpin:hover:not(.is-active) {
  border-color: var(--border);
  color: var(--text-secondary);
  background: #fff;
}

.pill-tabs--shop-brands .pill-tabs__link--jd.is-active:hover {
  border-color: #e4393c;
  color: #a82d30;
  background: rgba(228, 57, 60, 0.12);
}

.pill-tabs--shop-brands .pill-tabs__link--youpin.is-active:hover {
  border-color: #ff6900;
  color: #b35500;
  background: rgba(255, 105, 0, 0.13);
}

.page-shop__tabs-wrap {
  transition: background 0.45s ease, border-color 0.45s ease;
}

/* 电商频道：浅色渐变底 + 白底平台切换条（替代整屏大红/金棕），与全站风格一致 */
.page-shop__tabs-wrap.shop-theme-jd {
  background: linear-gradient(165deg, #fff8f8 0%, #f3f5f9 42%, #e8ecf1 100%);
  border-bottom: 1px solid rgba(228, 57, 60, 0.14);
}

.page-shop__tabs-wrap.shop-theme-youpin {
  background: linear-gradient(165deg, #fffaf3 0%, #f4f2ec 42%, #e8ecf1 100%);
  border-bottom: 1px solid rgba(255, 105, 0, 0.16);
}

.page-shop__tabs-wrap.shop-theme-jd .link-all {
  color: #c9302c;
  font-weight: var(--fw-semibold);
}

.page-shop__tabs-wrap.shop-theme-jd .link-all:hover {
  color: #a82d30;
}

.page-shop__tabs-wrap.shop-theme-youpin .link-all {
  color: #d35a00;
  font-weight: var(--fw-semibold);
}

.page-shop__tabs-wrap.shop-theme-youpin .link-all:hover {
  color: #b34a00;
}

.page-shop__tabs-wrap.shop-theme-jd .section-head--shop-platform .section-title,
.page-shop__tabs-wrap.shop-theme-youpin .section-head--shop-platform .section-title {
  position: relative;
  padding-left: 0.9rem;
}

.page-shop__tabs-wrap.shop-theme-jd .section-head--shop-platform .section-title::before,
.page-shop__tabs-wrap.shop-theme-youpin .section-head--shop-platform .section-title::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.12em;
  bottom: 0.12em;
  width: 3px;
  border-radius: 2px;
}

.page-shop__tabs-wrap.shop-theme-jd .section-head--shop-platform .section-title::before {
  background: #e4393c;
}

.page-shop__tabs-wrap.shop-theme-youpin .section-head--shop-platform .section-title::before {
  background: #ff6900;
}

.section-inner--shop {
  max-width: min(var(--max-width-wide), 100%);
}

/* 电商平台切换：无外框白底，仅保留 Tab 按钮自身样式 */
.shop-brand-tabs {
  display: flex;
  flex-wrap: nowrap;
  align-items: center;
  justify-content: flex-start;
  gap: 0.5rem;
  padding: 0;
  margin-bottom: 1.75rem;
  background: transparent;
  border: none;
  border-radius: 0;
  box-shadow: none;
  min-height: 0;
  box-sizing: border-box;
}

.shop-brand-tabs .pill-tabs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  align-content: center;
  margin: 0;
  flex: 1 1 auto;
  min-height: 0;
}

/* 电商 Tab：直角框、统一高度、图标与文字在按钮内垂直居中 */
.shop-brand-tabs .pill-tabs--shop-brands .pill-tabs__link {
  border-radius: 0;
  min-height: 2.625rem;
  padding-block: 0;
  padding-inline: 0.65rem 0.95rem;
  box-sizing: border-box;
  line-height: 1.25;
}

.shop-brand-tabs .pill-tabs--shop-brands .pill-tabs__brand-img--mi {
  border-radius: 0;
}

.shop-official-hint {
  margin: 2rem 0 0;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(0, 0, 0, 0.06);
  font-size: var(--fs-small);
  color: var(--text-secondary);
  text-align: center;
  line-height: var(--lh-body);
}

.shop-official-hint a {
  color: var(--brand-blue);
  font-weight: var(--fw-medium);
  text-decoration: none;
}

.shop-official-hint a:hover {
  text-decoration: underline;
}

.btn--shop-jd {
  background: #e4393c;
  color: #fff;
}

.btn--shop-jd:hover {
  background: #c9302c;
  color: #fff;
}

.btn--shop-youpin {
  background: #ff6900;
  color: #fff;
}

.btn--shop-youpin:hover {
  background: #e05f00;
  color: #fff;
}

.page-shop .shop-panels {
  position: relative;
  margin-top: 0.25rem;
  isolation: isolate;
}

.page-shop .shop-panel.is-active {
  position: relative;
  z-index: 2;
  opacity: 1;
  visibility: visible;
  transform: translate3d(0, 0, 0) scale(1);
  pointer-events: auto;
  transition:
    opacity 0.45s cubic-bezier(0.22, 1, 0.36, 1),
    transform 0.45s cubic-bezier(0.22, 1, 0.36, 1),
    visibility 0s step-start;
}

.page-shop .shop-panel:not(.is-active) {
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  z-index: 1;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translate3d(0, 18px, 0) scale(0.988);
  transition:
    opacity 0.4s cubic-bezier(0.22, 1, 0.36, 1),
    transform 0.4s cubic-bezier(0.22, 1, 0.36, 1),
    visibility 0s linear 0.4s;
}

@media (prefers-reduced-motion: reduce) {
  .page-shop .shop-panel {
    transition-duration: 0.01ms !important;
  }

  .page-shop .shop-panel:not(.is-active) {
    transform: none;
  }
}

.pill-tabs--shop-brands .pill-tabs__link:active {
  transform: scale(0.97);
}

.section-head--shop-platform {
  align-items: flex-start;
}

@media (min-width: 640px) {
  .section-head--shop-platform {
    align-items: center;
  }
}

/* —— 产品卡片网格 —— */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

.card-product {
  background: #fff;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: box-shadow 0.25s, transform 0.25s;
}

.card-product:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.card-product__img {
  aspect-ratio: 4/3;
  background: var(--bg-section);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.25rem;
  position: relative;
  overflow: hidden;
}

.card-product__img img {
  max-height: 200px;
  width: auto;
  margin: 0 auto;
  opacity: 0;
  transition: opacity 0.4s ease;
}

.product-showcase .product-showcase__figure,
.page-shop .card-product__img.product-showcase__figure {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 320px;
  min-height: 320px;
  max-height: 320px;
  aspect-ratio: auto;
  padding: 1.5rem 1.25rem;
  min-width: 0;
  max-width: 100%;
  box-sizing: border-box;
}

.product-showcase .product-showcase__figure img,
.page-shop .card-product__img.product-showcase__figure img {
  max-height: 100%;
  max-width: 100%;
  width: auto;
  height: auto;
  object-fit: contain;
}

.card-product__img img.is-loaded {
  opacity: 1;
}

/* 首页「新品专区」「热卖爆款」：窄屏单列时图片铺满图框（与多列时居中限高区分） */
#sec-new .product-grid,
#sec-hot .product-grid {
  container-type: inline-size;
}

@container (max-width: 599px) {
  #sec-new .card-product__img,
  #sec-hot .card-product__img {
    padding: 0;
    display: grid;
    place-items: stretch;
  }

  #sec-new .card-product__img img,
  #sec-hot .card-product__img img {
    max-height: none;
    width: 100%;
    height: 100%;
    min-height: 0;
    object-fit: cover;
    margin: 0;
  }
}

/* 不支持 @container 时：极窄视口下同样铺满（多为单列） */
@media (max-width: 560px) {
  #sec-new .card-product__img,
  #sec-hot .card-product__img {
    padding: 0;
    display: grid;
    place-items: stretch;
  }

  #sec-new .card-product__img img,
  #sec-hot .card-product__img img {
    max-height: none;
    width: 100%;
    height: 100%;
    min-height: 0;
    object-fit: cover;
    margin: 0;
  }
}

.card-product__body {
  padding: 1.25rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.card-product__title {
  margin: 0 0 0.5rem;
  font-size: var(--fs-h3);
  font-weight: var(--fw-semibold);
  color: var(--text-primary);
}

.card-product__meta {
  font-size: var(--fs-small);
  color: var(--text-muted);
  margin: 0 0 0.75rem;
  flex: 1;
}

.card-product__specs {
  font-size: var(--fs-small);
  color: var(--text-secondary);
  margin: 0 0 1rem;
  padding: 0;
  list-style: none;
}

.card-product__specs li {
  margin-bottom: 0.25rem;
}

.card-product__price {
  font-size: var(--fs-price);
  font-weight: var(--fw-bold);
  color: var(--text-primary);
  margin-bottom: 0.75rem;
}

.card-product__price small {
  font-size: var(--fs-small);
  font-weight: var(--fw-medium);
  color: var(--text-muted);
}

.card-product__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

/* —— 电商频道：对齐首页卡片结构，整体字号略小、更紧凑 —— */
.page-shop .section-head {
  margin-bottom: 1.25rem;
}

.page-shop .section-title {
  font-size: clamp(1.125rem, 2vw, 1.5rem);
  font-weight: var(--fw-semibold);
  letter-spacing: -0.02em;
}

.page-shop .link-all {
  font-size: var(--fs-caption);
}

.page-shop .pill-tabs {
  margin-bottom: 1.25rem;
}

.page-shop .pill-tabs--shop-brands .pill-tabs__link {
  font-size: var(--fs-caption);
}

.page-shop .product-grid {
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

.page-shop .shop-panels .card-product {
  border-color: rgba(0, 0, 0, 0.07);
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.045);
}

.page-shop .shop-panels .card-product:hover {
  box-shadow: 0 10px 36px rgba(0, 0, 0, 0.08);
}

.page-shop .card-product__body {
  padding: 1rem 1.1rem 1.15rem;
}

.page-shop .card-product__title {
  font-size: var(--fs-body);
  font-weight: var(--fw-semibold);
  margin-bottom: 0.35rem;
}

.page-shop .card-product__meta {
  font-size: var(--fs-caption);
  margin-bottom: 0.5rem;
  line-height: 1.45;
}

.page-shop .card-product__specs {
  font-size: var(--fs-caption);
  margin-bottom: 0.75rem;
  line-height: 1.45;
}

.page-shop .card-product__specs li {
  margin-bottom: 0.2rem;
}

.page-shop .card-product__price {
  font-size: var(--fs-small);
  font-weight: var(--fw-semibold);
  margin-bottom: 0.65rem;
}

.page-shop .card-product__actions {
  margin-top: auto;
}

.page-shop .card-product__actions .btn {
  width: 100%;
  justify-content: center;
  font-size: var(--fs-small);
  padding: 0.5rem 0.9rem;
}

/* —— 横幅 CTA —— */
.banner-cta {
  border-radius: var(--radius);
  padding: 2rem;
  background: linear-gradient(90deg, var(--brand-blue) 0%, #005a9e 100%);
  color: #fff;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1.5rem;
  align-items: center;
}

.banner-cta h2 {
  margin: 0 0 0.5rem;
  font-size: var(--fs-h2);
  font-weight: var(--fw-semibold);
  line-height: var(--lh-heading);
}

.banner-cta p {
  margin: 0;
  opacity: 0.95;
  font-size: var(--fs-body);
  font-weight: var(--fw-regular);
  line-height: var(--lh-body);
}

@media (max-width: 640px) {
  .banner-cta {
    grid-template-columns: 1fr;
  }
}

/* —— 页脚：满宽、浅灰底、与主导航一致的网站地图 —— */
.site-footer {
  width: 100%;
  box-sizing: border-box;
  background: #ebebed;
  color: #636363;
  font-size: 0.9375rem;
  line-height: 1.55;
  /* 原 margin-top:3rem 并入上内边距，main 与 footer 之间为页脚灰底而非 body 白底 */
  padding: 5.75rem 0 2.25rem;
  margin: 0;
}

.footer-inner {
  width: 100%;
  max-width: none;
  margin: 0;
  padding: 0 1.5rem;
  box-sizing: border-box;
  text-align: left;
}

@media (min-width: 1024px) {
  .footer-inner {
    padding: 0 2.5rem;
  }
}

.footer-sitemap {
  padding: 0;
  margin: 0;
}

.footer-sitemap__row {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 1.75rem 2rem;
  align-items: start;
  text-align: left;
}

@media (max-width: 1100px) {
  .footer-sitemap__row {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .footer-sitemap__row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 400px) {
  .footer-sitemap__row {
    grid-template-columns: 1fr;
  }
}

.footer-sitemap__head {
  display: block;
  font-size: 0.9375rem;
  font-weight: var(--fw-semibold);
  color: #636363;
  text-decoration: none;
  margin: 0 0 0.65rem;
  line-height: 1.3;
}

.footer-sitemap__head:hover {
  color: var(--brand-blue);
  text-decoration: none;
}

.footer-sitemap__sub {
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer-sitemap__sub li {
  margin: 0 0 0.4rem;
}

.footer-sitemap__sub li:last-child {
  margin-bottom: 0;
}

.footer-sitemap__sub a {
  font-size: 0.875rem;
  color: #636363;
  text-decoration: none;
  line-height: 1.45;
}

.footer-sitemap__sub a:hover {
  color: var(--brand-blue);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.footer-sitemap__external {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1.5rem;
  margin-top: 2rem;
  padding-top: 1.25rem;
  border-top: 1px solid #d2d2d7;
}

.footer-sitemap__external a {
  font-size: 0.875rem;
  font-weight: var(--fw-medium);
  color: #636363;
  text-decoration: none;
}

.footer-sitemap__external a:hover {
  color: var(--brand-blue);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-start;
  align-items: baseline;
  column-gap: 1.25rem;
  row-gap: 0.45rem;
  border-top: 1px solid #d2d2d7;
  padding-top: 1.35rem;
  margin-top: 1.5rem;
  text-align: left;
  line-height: 1.55;
  font-size: 0.875rem;
  color: #636363;
}

.footer-legal a {
  color: #636363;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.footer-legal a:hover {
  color: var(--brand-blue);
}

.footer-legal p {
  margin: 0;
}

/* 页脚细体声明区 */
.footer-disclaimers {
  margin-top: 1.5rem;
  padding-top: 1.35rem;
  border-top: 1px solid #d2d2d7;
  font-size: 0.8125rem;
  line-height: 1.65;
  color: #636363;
  text-align: left;
  letter-spacing: 0.01em;
}

.footer-disclaimers__block {
  margin: 0 0 1rem;
}

.footer-disclaimers__block:last-child {
  margin-bottom: 0;
}

.footer-disclaimers p {
  margin: 0 0 0.55rem;
}

.footer-disclaimers p:last-child {
  margin-bottom: 0;
}

.footer-disclaimers__block > p:first-child {
  margin-top: 0;
}

.footer-disclaimers strong {
  display: block;
  color: #424245;
  font-weight: 600;
  font-size: 0.8125rem;
  margin-bottom: 0.4rem;
  letter-spacing: 0.02em;
}

.footer-disclaimers__inline-strong {
  display: inline;
  font-weight: 600;
  color: #424245;
}

.footer-disclaimers ol {
  margin: 0.35rem 0 0;
  padding-left: 1.15rem;
}

.footer-disclaimers ol li {
  margin-bottom: 0.35rem;
}

.footer-disclaimers ol li:last-child {
  margin-bottom: 0;
}

.footer-disclaimers a {
  color: #636363;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.footer-disclaimers a:hover {
  color: var(--brand-blue);
}

/* —— 内页通用：页面标题 —— */
.page-hero {
  background: var(--bg-section);
  padding: 2.5rem 1.25rem;
  border-bottom: 1px solid var(--border);
}

.page-hero__inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.page-hero__kicker {
  margin: 0 0 0.25rem;
  font-size: var(--fs-small);
  font-weight: var(--fw-medium);
  color: var(--text-muted);
  line-height: var(--lh-body);
}

.page-hero h1 {
  margin: 0 0 0.5rem;
  font-size: var(--fs-h2);
  font-weight: var(--fw-semibold);
  line-height: var(--lh-heading);
}

.page-hero p {
  margin: 0;
  font-size: var(--fs-body);
  font-weight: var(--fw-regular);
  color: var(--text-secondary);
  max-width: 56ch;
  line-height: var(--lh-body);
}

.page-hero .page-hero__lead {
  font-size: var(--fs-lead);
  line-height: 1.55;
}

.page-hero--nova {
  text-align: left;
  padding: 3rem 1.25rem 3.5rem;
  background: linear-gradient(180deg, var(--bg-section) 0%, #fff 100%);
  border-bottom: 1px solid var(--border);
}

.page-hero--nova .page-hero__inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.page-hero--nova .page-hero__kicker {
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-size: var(--fs-caption);
  margin-bottom: 0.5rem;
}

.page-hero--nova h1 {
  font-size: clamp(1.875rem, 3.5vw, 2.375rem);
  margin-bottom: 0.75rem;
}

.page-hero--nova .page-hero__lead {
  margin: 0;
  max-width: 56ch;
  font-size: var(--fs-lead);
  font-weight: var(--fw-regular);
  color: var(--text-secondary);
  line-height: 1.55;
}

.page-hero__inner--nova-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(200px, 38%);
  gap: 2rem 2.5rem;
  align-items: center;
}

.page-hero__nova-visual img {
  width: 100%;
  max-width: 520px;
  margin-left: auto;
  height: auto;
  display: block;
  border-radius: var(--radius-btn);
  box-shadow: var(--shadow-card);
}

@media (max-width: 900px) {
  .page-hero__inner--nova-split {
    grid-template-columns: 1fr;
  }

  .page-hero__nova-visual {
    order: -1;
    max-width: min(100%, 360px);
    margin: 0 auto;
  }

  .page-hero__nova-visual img {
    margin-left: 0;
  }
}

.page-nova {
  text-align: left;
}

.page-nova .nova-intro,
.page-nova .nova-manual-block,
.page-nova .nova-outline-card {
  width: 100%;
  box-sizing: border-box;
  text-align: left;
}

/* —— 产品详情：左右分栏 + 参数表 —— */
.product-detail {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 1.25rem 3rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  align-items: start;
}

@media (max-width: 900px) {
  .product-detail {
    grid-template-columns: 1fr;
  }
}

.gallery-main {
  background: var(--bg-section);
  border-radius: var(--radius);
  aspect-ratio: 4/3;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  margin-bottom: 1rem;
}

.gallery-main img {
  max-height: 320px;
  width: auto;
  margin: 0 auto;
}

.gallery-thumbs {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.gallery-thumbs button {
  width: 72px;
  height: 72px;
  padding: 4px;
  border: 2px solid transparent;
  border-radius: var(--radius-sm);
  background: var(--bg-section);
  cursor: pointer;
  overflow: hidden;
}

.gallery-thumbs button.is-active {
  border-color: var(--brand-blue);
}

.gallery-thumbs img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.spec-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--fs-small);
}

.spec-table th,
.spec-table td {
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}

.spec-table th {
  color: var(--text-muted);
  font-weight: var(--fw-medium);
  width: 38%;
}

.spec-table td {
  font-weight: var(--fw-regular);
  color: var(--text-primary);
}

/* —— 下载 / 教程列表 —— */
.file-list,
.article-list {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.25rem 3rem;
}

.file-row,
.article-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--border);
}

.file-row:last-child,
.article-row:last-child {
  border-bottom: none;
}

.file-row h3,
.article-row h3 {
  margin: 0 0 0.25rem;
  font-size: var(--fs-body);
  font-weight: var(--fw-semibold);
  line-height: var(--lh-heading);
  color: var(--text-primary);
}

.file-row p,
.article-row p {
  margin: 0;
  font-size: var(--fs-small);
  color: var(--text-muted);
}

.file-row--text-only {
  justify-content: flex-start;
}

.tutorial-embed {
  margin-top: 0.75rem;
  max-width: 42rem;
}

.tutorial-embed iframe {
  width: 100%;
  height: 360px;
  border: 0;
  border-radius: var(--radius-sm);
  background: #111;
}

.tutorial-page-figure {
  padding-top: 0.25rem;
  width: 100%;
  max-width: none;
}

.tutorial-page-figure__inner {
  margin: 0;
  width: 100%;
}

.tutorial-page-figure__trigger {
  display: block;
  width: 100%;
  margin: 0;
  padding: 0;
  border: 0;
  background: none;
  cursor: zoom-in;
  border-radius: var(--radius-sm);
  overflow: hidden;
  line-height: 0;
}

.tutorial-page-figure__trigger:focus-visible {
  outline: 2px solid var(--brand-blue);
  outline-offset: 3px;
}

.tutorial-page-figure__trigger img {
  display: block;
  width: 100%;
  max-width: none;
  height: auto;
  vertical-align: middle;
}

.tutorial-page-figure__credit {
  margin: 0.5rem 0 0;
  font-size: var(--fs-small);
  color: var(--text-muted);
}

/* 教程页：大图灯箱（灰底、滚轮缩放、拖拽平移） */
.tutorial-figure-lightbox {
  position: fixed;
  inset: 0;
  z-index: 10050;
  box-sizing: border-box;
}

.tutorial-figure-lightbox[hidden] {
  display: none !important;
}

.tutorial-figure-lightbox__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(55, 55, 58, 0.92);
  cursor: zoom-out;
}

.tutorial-figure-lightbox__frame {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: min(2rem, 4vw);
  box-sizing: border-box;
  overflow: hidden;
  pointer-events: none;
}

.tutorial-figure-lightbox__pan {
  pointer-events: auto;
  transform-origin: center center;
  will-change: transform;
  cursor: grab;
  touch-action: none;
  max-width: 96vw;
  max-height: 90vh;
}

.tutorial-figure-lightbox__pan.is-dragging {
  cursor: grabbing;
}

.tutorial-figure-lightbox__img {
  display: block;
  max-width: 96vw;
  max-height: 90vh;
  width: auto;
  height: auto;
  object-fit: contain;
  -webkit-user-select: none;
  user-select: none;
}

/* —— 表单 —— */
.form-grid {
  max-width: 560px;
  display: grid;
  gap: 1rem;
}

.form-grid label {
  font-size: var(--fs-small);
  font-weight: var(--fw-semibold);
  color: var(--text-secondary);
  line-height: var(--lh-body);
}

.form-grid input,
.form-grid textarea,
.form-grid select {
  width: 100%;
  padding: 0.65rem 0.85rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  color: var(--text-primary);
}

.form-grid textarea {
  min-height: 140px;
  resize: vertical;
}

/* —— 滚动显现 —— */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* —— Nova Studio 特性块 —— */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}

.feature-grid--nova {
  gap: 1.25rem 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.feature-grid--pair {
  width: 100%;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.feature-block {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
}

.feature-block h3 {
  margin: 0 0 0.5rem;
  font-size: var(--fs-h3);
  font-weight: var(--fw-semibold);
  line-height: var(--lh-heading);
  color: var(--text-primary);
}

.feature-block p {
  margin: 0;
  font-size: var(--fs-small);
  font-weight: var(--fw-regular);
  line-height: var(--lh-body);
  color: var(--text-secondary);
}

/* —— 联系页 / 下载筛选 —— */
/* 旧版 .contact-layout 已弃用，联系页改用 .contact-top + .section-inner--contact */

.page-contact .page-hero__inner--contact {
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  text-align: left;
}

.page-contact .page-hero__inner--contact .page-hero__lead {
  max-width: min(72ch, 100%);
}

.section-inner--contact {
  max-width: var(--max-width);
  width: 100%;
  margin-left: auto;
  margin-right: auto;
  text-align: left;
}

.section--contact {
  padding-top: 2.25rem;
  padding-bottom: 3.5rem;
}

.section-inner--contact .contact-page-banner-cta {
  margin-top: 1.5rem;
}

.contact-top {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.5rem 2.5rem;
  align-items: stretch;
}

@media (max-width: 800px) {
  .contact-top {
    grid-template-columns: 1fr;
  }
}

.contact-card {
  border: 1px solid var(--border);
  background: #fff;
  border-radius: var(--radius-sm);
  padding: 1.25rem 1.35rem;
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.04);
}

.filter-bar {
  display: grid;
  grid-template-columns: 1fr 1fr auto;
  gap: 1rem;
  align-items: end;
  max-width: 800px;
  margin: 0 auto 2rem;
}

.filter-bar .btn {
  height: 42px;
}

/* —— 产品页：首行双列（玲珑 / 星核并排），窄屏单列 —— */
.product-showcase-wrap {
  max-width: var(--max-width-wide);
  margin: 0 auto;
  padding: 2rem 1.25rem 3rem;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2rem;
  align-items: stretch;
}

@media (max-width: 900px) {
  .product-showcase-wrap {
    grid-template-columns: 1fr;
    min-width: 0;
    width: 100%;
    box-sizing: border-box;
  }
}

.product-showcase {
  border: 1px solid var(--border);
  background: #fff;
  padding: 1.5rem;
  min-width: 0;
  max-width: 100%;
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  min-height: 0;
  height: 100%;
  align-self: stretch;
}

.product-showcase > h2 {
  margin: 0 0 1rem;
  font-size: var(--fs-h3);
  font-weight: var(--fw-semibold);
}

.product-showcase .product-spec-dell {
  flex: 1 1 auto;
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.product-showcase .product-lead {
  color: var(--text-secondary);
  margin: 0 0 1rem;
  line-height: var(--lh-body);
}

.product-showcase .subsection-title {
  margin-top: 1.25rem;
}

.product-showcase .card-product__actions {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.5rem;
  flex-shrink: 0;
  margin-top: auto;
  padding-top: 1.25rem;
}

.product-showcase .card-product__actions .btn {
  width: auto;
  min-width: 10rem;
}

/* 产品页：仿 Dell 商城列表卡「要点」式配置条（参考 dell.com 笔记本列表产品摘要） */
.product-spec-dell {
  margin: 0 0 1.25rem;
  padding: 1rem 1rem 0.85rem;
  background: linear-gradient(180deg, #fbfbfc 0%, #f5f6f7 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

.product-spec-dell__title {
  margin: 0 0 0.65rem;
  font-size: var(--fs-small);
  font-weight: var(--fw-semibold);
  letter-spacing: 0.02em;
  color: var(--text-secondary);
  text-transform: uppercase;
}

.product-spec-dell__list {
  margin: 0;
  padding: 0 0 0 1.15rem;
  list-style: disc;
  color: var(--text-primary);
  font-size: var(--fs-small);
  line-height: 1.55;
}

.product-spec-dell__list li {
  margin-bottom: 0.4rem;
  padding-left: 0.15rem;
}

.product-spec-dell__list li::marker {
  color: var(--text-muted);
}

.product-spec-dell__note {
  margin: 0.65rem 0 0;
  padding-top: 0.55rem;
  border-top: 1px solid var(--border);
  font-size: var(--fs-caption);
  line-height: var(--lh-body);
  color: var(--text-muted);
}

.prose-narrow {
  max-width: 72ch;
}

/* —— 使用条款页（结构参考常见厂商条款页，如 HP 使用条款） —— */
.page-terms .terms-toc {
  box-sizing: border-box;
  width: 100%;
  max-width: 100%;
  margin: 0 0 2rem;
  padding: 1rem 1.15rem;
  text-align: left;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

.page-terms .terms-toc__title {
  margin: 0 0 0.65rem;
  font-size: var(--fs-small);
  font-weight: var(--fw-semibold);
  color: var(--text-secondary);
  text-align: left;
}

.page-terms .terms-toc__list {
  margin: 0;
  padding: 0 0 0 1.15rem;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(11rem, max-content));
  justify-content: start;
  justify-items: start;
  gap: 0.35rem 1.5rem;
  font-size: var(--fs-small);
  line-height: 1.5;
  list-style: disc;
  color: var(--text-secondary);
  text-align: left;
}

.page-terms .terms-toc__list a {
  color: var(--brand-blue);
  text-decoration: none;
}

.page-terms .terms-toc__list a:hover {
  text-decoration: underline;
}

.page-terms .terms-article h2 {
  font-size: var(--fs-h3);
  font-weight: var(--fw-semibold);
  margin: 2rem 0 0.75rem;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  scroll-margin-top: calc(var(--header-total, 104px) + 0.5rem);
}

.page-terms .terms-article h2:first-of-type {
  margin-top: 0;
}

.page-terms .terms-article p,
.page-terms .terms-article li {
  font-size: var(--fs-small);
  line-height: 1.65;
  color: var(--text-secondary);
}

.page-terms .terms-article p {
  margin: 0 0 0.85rem;
}

.page-terms .terms-article ul,
.page-terms .terms-article ol {
  margin: 0.35rem 0 1rem;
  padding-left: 1.25rem;
}

.page-terms .terms-article li {
  margin-bottom: 0.35rem;
}

.page-terms .terms-article a {
  color: var(--brand-blue);
}

.page-terms .terms-article__revise {
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  font-size: var(--fs-caption);
  color: var(--text-muted);
}

/* 宽屏：正文不用 72ch，与内容区同宽，避免过早换行 */
@media (min-width: 901px) {
  .page-terms .terms-article.prose-narrow {
    max-width: 100%;
    margin-left: 0;
    margin-right: 0;
  }
}

@media (max-width: 640px) {
  .filter-bar {
    grid-template-columns: 1fr;
  }
}

/* —— 统一工具类与内页组件（字体层级一致） —— */
.text-muted {
  color: var(--text-muted);
}

.text-secondary {
  color: var(--text-secondary);
}

.text-small {
  font-size: var(--fs-small);
  line-height: var(--lh-body);
}

.text-nowrap {
  white-space: nowrap;
}

.section-inner--narrow {
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.download-lead {
  margin: 0 0 1.5rem;
  font-size: var(--fs-small);
  font-weight: var(--fw-regular);
  color: var(--text-muted);
  line-height: var(--lh-body);
}

.product-detail__sku {
  margin: 0 0 0.5rem;
  font-size: var(--fs-small);
  font-weight: var(--fw-medium);
  color: var(--text-muted);
  line-height: var(--lh-body);
}

.product-detail__name {
  margin: 0 0 0.5rem;
  font-size: var(--fs-product-title);
  font-weight: var(--fw-semibold);
  line-height: var(--lh-heading);
  color: var(--text-primary);
}

.product-detail__lead {
  margin: 0 0 1rem;
  font-size: var(--fs-body);
  font-weight: var(--fw-regular);
  color: var(--text-secondary);
  line-height: var(--lh-body);
}

.product-detail__price-block {
  margin-bottom: 1rem;
}

.product-detail__price-block small {
  font-weight: var(--fw-regular);
}

.product-detail__note {
  margin: 0 0 1.25rem;
  font-size: var(--fs-small);
  font-weight: var(--fw-regular);
  color: var(--text-muted);
  line-height: var(--lh-body);
}

.product-detail__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 2rem;
}

.subsection-title {
  margin: 0 0 0.75rem;
  font-size: var(--fs-h4);
  font-weight: var(--fw-semibold);
  line-height: var(--lh-heading);
  color: var(--text-primary);
}

.list-bullets {
  font-size: var(--fs-small);
  font-weight: var(--fw-regular);
  color: var(--text-secondary);
  padding-left: 1.25rem;
  margin: 0 0 1.5rem;
  line-height: 1.6;
}

.contact-sidebar__title {
  margin: 0 0 0.75rem;
  font-size: var(--fs-h3);
  font-weight: var(--fw-semibold);
  line-height: var(--lh-heading);
  color: var(--text-primary);
}

.contact-sidebar p {
  margin: 0 0 0.75rem;
  font-size: var(--fs-small);
  font-weight: var(--fw-regular);
  color: var(--text-secondary);
  line-height: var(--lh-body);
}

.contact-sidebar p:last-child {
  margin-bottom: 0;
}

.hero--purple {
  background: linear-gradient(145deg, #1a0a2e 0%, #2d1b4e 40%, #0f172a 100%);
}

.hero-slides--compact {
  min-height: 360px;
}

.hero-slides--compact .hero-slide {
  min-height: 360px;
  padding: 2.5rem 1.25rem 3rem;
}

.hero-slide--split {
  grid-template-columns: 1.1fr 0.9fr;
}

@media (max-width: 768px) {
  .hero-slide--split {
    grid-template-columns: 1fr;
  }
}

.device-picker {
  padding: 0 1.25rem 2rem;
  max-width: 1120px;
  margin: 0 auto;
}

.download-pick__hint {
  margin: 0 0 1rem;
  font-size: var(--fs-small);
  font-weight: var(--fw-semibold);
  color: var(--text-secondary);
}

.device-picker-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
}

a.device-card,
button.device-card {
  display: block;
  width: 100%;
  padding: 1.25rem 1.5rem;
  border: 1px solid var(--border-subtle);
  background: var(--surface);
  text-decoration: none;
  color: inherit;
  text-align: left;
  font: inherit;
  cursor: pointer;
  box-sizing: border-box;
}

a.device-card:hover,
button.device-card:hover {
  border-color: var(--text-primary);
}

a.device-card strong,
button.device-card strong {
  display: block;
  margin-bottom: 0.5rem;
  font-size: var(--fs-h4);
  font-weight: var(--fw-semibold);
}

a.device-card span,
button.device-card span {
  font-size: var(--fs-small);
  font-weight: var(--fw-regular);
  color: var(--text-muted);
  line-height: var(--lh-body);
}

/* 软件下载 / 服务支持 · 选择机型：底色通栏铺满（page-device-flow） */
.page-device-flow .device-picker.download-pick {
  max-width: none;
  width: 100%;
  margin: 0;
  padding: 0;
  background: linear-gradient(180deg, var(--bg-section) 0%, #fff 55%);
  border-bottom: 1px solid var(--border);
}

.page-device-flow .download-pick__inner {
  max-width: 960px;
  margin: 0 auto;
  padding: 3rem 1.5rem 4.5rem;
  box-sizing: border-box;
}

.page-device-flow .download-pick__hint {
  margin: 0 0 2.25rem;
  max-width: 36rem;
  font-size: 1.0625rem;
  font-weight: var(--fw-semibold);
  line-height: 1.5;
  color: var(--text-primary);
}

.page-device-flow .download-pick__inner .device-picker-grid {
  gap: 2rem 2.25rem;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.page-device-flow .device-card--pick {
  padding: 2rem 1.85rem 2.15rem;
  border: 2px solid #c8c8cd;
  background: #fff;
  box-shadow: 0 4px 22px rgba(0, 0, 0, 0.07);
  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.page-device-flow .device-card--pick:hover {
  border-color: var(--brand-blue);
  box-shadow: 0 10px 32px rgba(0, 118, 206, 0.16);
  transform: translateY(-3px);
}

.page-device-flow .device-card--pick:focus-visible {
  outline: 2px solid var(--brand-blue);
  outline-offset: 3px;
}

.page-device-flow .device-card--pick strong {
  font-size: 1.3125rem;
  margin-bottom: 0.85rem;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.page-device-flow .device-card--pick span {
  font-size: var(--fs-body);
  line-height: 1.6;
  color: var(--text-secondary);
}

@media (max-width: 640px) {
  .page-device-flow .download-pick__inner {
    padding: 2.25rem 1.25rem 3.25rem;
  }

  .page-device-flow .download-pick__inner .device-picker-grid {
    gap: 1.5rem;
  }
}

/* 软件下载：有 JS 时先选机型再显示列表 */
html.js .page-device-flow .download-panel {
  display: none;
}

html.js .page-device-flow .download-panel.is-active {
  display: block;
}

html.js .page-device-flow #download-pick.is-hidden,
html.js .page-device-flow #tutorial-pick.is-hidden {
  display: none;
}

.download-panels-wrap {
  padding-top: 1.75rem;
}

.download-back {
  margin: 0.5rem 0 1.25rem;
}

.page-device-flow .device-card--pick .device-card__thumb {
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1rem;
  min-height: 120px;
  max-height: 168px;
}

.page-device-flow .device-card--pick .device-card__thumb img {
  max-height: 150px;
  max-width: 100%;
  width: auto;
  object-fit: contain;
}

.download-panel-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem 1.5rem;
  margin: 0 0 1.25rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-subtle);
}

.download-panel-head__thumb {
  flex: 0 0 auto;
  width: 132px;
  height: 100px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-section);
  border: 1px solid var(--border-subtle);
  padding: 0.4rem;
  box-sizing: border-box;
}

.download-panel-head__thumb img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

.download-panel-head .download-group-title {
  margin: 0;
  flex: 1 1 220px;
  border-bottom: none;
  padding-bottom: 0;
}

.download-group {
  margin-bottom: 2.25rem;
}

.download-group-title {
  margin: 0 0 1rem;
  font-size: var(--fs-h3);
  font-weight: var(--fw-semibold);
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-subtle);
}

.download-group .download-category {
  border: 1px solid var(--border-subtle);
  background: #fff;
  padding: 1rem 1.25rem 0;
  margin-bottom: 1.5rem;
}

.download-group .download-category:last-child {
  margin-bottom: 0;
}

.download-group .download-category .subsection-title {
  margin-top: 0;
  margin-bottom: 0.5rem;
  padding-bottom: 0.65rem;
  border-bottom: 1px solid var(--border-subtle);
}

.download-group .download-category .subsection-head--nova {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-top: 0;
  margin-bottom: 0.5rem;
  padding-bottom: 0.65rem;
  border-bottom: 1px solid var(--border-subtle);
}

.download-group .download-category .subsection-head--nova .subsection-title {
  margin: 0;
  padding: 0;
  border: none;
}

.download-group .download-category .subsection-head__nova-img {
  width: 56px;
  height: 42px;
  object-fit: contain;
  flex-shrink: 0;
}

.download-group .download-category .file-row {
  padding: 1.1rem 1rem;
  margin-bottom: 0.7rem;
  border: 1px solid var(--border);
  background: #f8f9fb;
  align-items: flex-start;
}

.download-group .download-category .file-row:last-child {
  margin-bottom: 0;
  padding-bottom: 1.2rem;
  border-bottom: 1px solid var(--border);
}

.download-group .download-history {
  margin-bottom: 0.7rem;
  border: 1px solid var(--border);
  background: #f5f6f8;
}

.download-group .download-history__summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.85rem 1rem;
  font-size: var(--fs-small);
  font-weight: var(--fw-semibold);
  color: var(--text-primary);
  cursor: pointer;
  list-style: none;
  user-select: none;
}

.download-group .download-history__summary::-webkit-details-marker {
  display: none;
}

.download-group .download-history__summary::after {
  content: "▾";
  font-size: 0.7rem;
  opacity: 0.65;
  transition: transform 0.2s ease;
}

.download-group .download-history[open] .download-history__summary::after {
  transform: rotate(-180deg);
}

.download-group .download-history__body {
  padding: 0;
  border-top: 1px solid var(--border-subtle);
  background: #fff;
}

.download-group .download-history__body .file-row {
  margin-bottom: 0;
  border: none;
  background: #fff;
  padding: 1.1rem 1rem 1.2rem;
}

.download-callout {
  margin-top: 0.5rem;
  font-size: var(--fs-small);
  color: var(--text-muted);
}

.download-group .download-callout {
  margin-top: 0.65rem;
  padding: 0.5rem 0.65rem 0.55rem 0.75rem;
  border-left: 3px solid #f59e0b;
  background: rgba(245, 158, 11, 0.1);
  color: var(--text-secondary);
  line-height: 1.55;
}

.download-group .download-callout strong {
  color: #b45309;
  font-weight: var(--fw-semibold);
}

.file-row .download-meta {
  font-size: var(--fs-small);
  color: var(--text-muted);
  margin: 0.25rem 0 0;
}

.contact-social-grid {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-top: 0.75rem;
}

.contact-social-grid h3 {
  margin: 0 0 0.35rem;
  font-size: var(--fs-small);
  font-weight: var(--fw-semibold);
}

.contact-note-list {
  margin: 0.5rem 0 0;
  padding-left: 1.25rem;
  font-size: var(--fs-small);
  color: var(--text-secondary);
  line-height: 1.55;
}

.nova-manual-lead {
  margin: 0 0 1rem;
  font-size: var(--fs-body);
  line-height: var(--lh-body);
}

.page-nova__section {
  scroll-margin-top: 1rem;
}

.nova-intro {
  background: #fff;
  border: 1px solid var(--border);
  padding: 1.75rem 1.5rem;
}

.nova-intro .subsection-title {
  margin-top: 0;
}

.nova-lead {
  margin: 0;
  font-size: var(--fs-body);
  line-height: 1.65;
  color: var(--text-primary);
}

.nova-lead strong {
  font-weight: var(--fw-semibold);
}

.nova-manual-block {
  background: #fff;
  border: 1px solid var(--border);
  padding: 1.75rem 1.5rem;
}

.nova-manual-head {
  margin-bottom: 1rem;
}

.nova-manual-head__title {
  margin-bottom: 0.35rem;
}

.nova-doc-badge {
  margin: 0;
  font-size: var(--fs-small);
  font-weight: var(--fw-medium);
  color: var(--text-muted);
}

.nova-manual-block .nova-lead {
  margin-bottom: 1.25rem;
  color: var(--text-secondary);
}

.nova-doc-note {
  margin: 1rem 0 0;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  font-size: var(--fs-caption);
  color: var(--text-muted);
  line-height: 1.55;
}

.nova-outline-card {
  background: #fff;
  border: 1px solid var(--border);
  padding: 1.5rem 1.5rem 1.5rem 1.35rem;
}

.nova-outline-list {
  margin: 0;
  padding-left: 1.35rem;
  font-size: var(--fs-small);
  line-height: 1.7;
  color: var(--text-secondary);
}

.nova-outline-list li {
  margin-bottom: 0.65rem;
  padding-left: 0.15rem;
}

.nova-outline-list li:last-child {
  margin-bottom: 0;
}

.nova-outline-list strong {
  color: var(--text-primary);
  font-weight: var(--fw-semibold);
}

.nova-actions-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1rem;
}

.feature-block .nova-actions-row {
  margin-top: 1.1rem;
}

/* —— NovaStudio 页：主内容区深色 #1a2736（不含顶栏 logo、主导航、页脚） —— */
body.page-nova-site {
  background-color: #1a2736;
}

body.page-nova-site main.page-nova {
  background-color: #1a2736;
  color: #e8eef5;
}

body.page-nova-site main.page-nova .page-hero--nova {
  background: #1a2736;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

body.page-nova-site main.page-nova .page-hero--nova .page-hero__kicker {
  color: rgba(255, 255, 255, 0.78);
}

body.page-nova-site main.page-nova .page-hero--nova h1 {
  color: #f5f8fc;
}

body.page-nova-site main.page-nova .page-hero--nova .page-hero__lead {
  color: #b8c5d6;
}

body.page-nova-site main.page-nova .page-hero__nova-visual img {
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

body.page-nova-site main.page-nova .section,
body.page-nova-site main.page-nova .section--muted {
  background-color: #1a2736;
}

body.page-nova-site main.page-nova .section-title,
body.page-nova-site main.page-nova .subsection-title {
  color: #f0f5fb;
}

body.page-nova-site main.page-nova .section-head__desc {
  color: #b8c5d6;
}

body.page-nova-site main.page-nova .section-head__desc a {
  color: #8ec5f0;
}

body.page-nova-site main.page-nova .section-head__desc a:hover {
  color: #c5e3ff;
}

body.page-nova-site main.page-nova .nova-intro,
body.page-nova-site main.page-nova .nova-manual-block,
body.page-nova-site main.page-nova .nova-outline-card {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.12);
}

body.page-nova-site main.page-nova .nova-lead {
  color: #e8eef5;
}

body.page-nova-site main.page-nova .nova-manual-block .nova-lead {
  color: #c5d0e0;
}

body.page-nova-site main.page-nova .nova-doc-badge {
  color: #94a3b8;
}

body.page-nova-site main.page-nova .nova-doc-note {
  color: #94a3b8;
  border-top-color: rgba(255, 255, 255, 0.12);
}

body.page-nova-site main.page-nova .nova-outline-list {
  color: #c5d0e0;
}

body.page-nova-site main.page-nova .nova-outline-list strong {
  color: #f0f5fb;
}

body.page-nova-site main.page-nova .feature-block {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.12);
}

body.page-nova-site main.page-nova .feature-block h3 {
  color: #f0f5fb;
}

body.page-nova-site main.page-nova .feature-block p {
  color: #c5d0e0;
}

body.page-nova-site main.page-nova .feature-block p a:not(.btn),
body.page-nova-site main.page-nova .feature-block li a:not(.btn) {
  color: #8ec5f0;
}

body.page-nova-site main.page-nova .feature-block p a:not(.btn):hover,
body.page-nova-site main.page-nova .feature-block li a:not(.btn):hover {
  color: #c5e3ff;
}

body.page-nova-site main.page-nova .banner-cta {
  background: linear-gradient(135deg, #243447 0%, #1e2d3f 100%);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: #e8eef5;
}

body.page-nova-site main.page-nova .banner-cta h2 {
  color: #f5f8fc;
}

body.page-nova-site main.page-nova .banner-cta p {
  color: #c5d0e0;
  opacity: 1;
}

/* —— 全站：玲珑AI精灵（与论坛 #ai-gw-toggle 行为一致，可拖动） —— */
.ai-assist-fab {
  position: fixed;
  right: max(1rem, env(safe-area-inset-right));
  bottom: max(1rem, env(safe-area-inset-bottom));
  left: auto;
  top: auto;
  z-index: 1000;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.65rem 1.1rem;
  max-width: min(92vw, 14rem);
  font-size: var(--fs-small);
  font-weight: var(--fw-semibold);
  letter-spacing: 0.02em;
  color: #fff;
  text-decoration: none;
  white-space: nowrap;
  background: linear-gradient(145deg, var(--brand-blue) 0%, var(--brand-blue-dark) 100%);
  border: none;
  border-radius: 999px;
  box-shadow: 0 4px 18px rgba(0, 90, 158, 0.42);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  cursor: grab;
  user-select: none;
  touch-action: none;
  -webkit-tap-highlight-color: transparent;
  appearance: none;
  font-family: inherit;
  line-height: var(--lh-body);
}

.ai-assist-fab:hover:not(:disabled):not(.is-dragging) {
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 6px 22px rgba(0, 90, 158, 0.5);
}

.ai-assist-fab:focus-visible {
  outline: 2px solid var(--brand-blue);
  outline-offset: 3px;
}

.ai-assist-fab.is-dragging {
  cursor: grabbing;
  transform: none;
  box-shadow: 0 6px 22px rgba(0, 90, 158, 0.55);
  transition: none;
}

/* 全站：论坛同款 AI 浮层 #ai-gw-overlay / #ai-gw-panel（内嵌 bbs，与「AI 提问」一致） */
.ai-gw-overlay {
  position: fixed;
  inset: 0;
  z-index: 1001;
  display: flex;
  justify-content: flex-end;
  align-items: stretch;
  padding: 0;
  margin: 0;
  background: rgba(15, 15, 20, 0.48);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.28s ease, visibility 0.28s ease;
}

.ai-gw-overlay.is-open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.ai-gw-panel {
  width: min(100vw, 440px);
  max-width: 100%;
  min-height: 100%;
  background: #fff;
  box-shadow: -12px 0 40px rgba(0, 0, 0, 0.2);
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform 0.34s cubic-bezier(0.22, 1, 0.36, 1);
}

.ai-gw-overlay.is-open .ai-gw-panel {
  transform: translateX(0);
}

.ai-gw-panel__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  background: #fff;
}

.ai-gw-panel__title {
  margin: 0;
  font-size: var(--fs-h4);
  font-weight: var(--fw-semibold);
  color: var(--text-primary);
  line-height: var(--lh-heading);
}

.ai-gw-panel__close {
  flex-shrink: 0;
  width: 2.25rem;
  height: 2.25rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: #fff;
  color: var(--text-secondary);
  font-size: 1.35rem;
  line-height: 1;
  cursor: pointer;
  font-family: inherit;
}

.ai-gw-panel__close:hover {
  background: var(--bg-section);
  color: var(--text-primary);
}

.ai-gw-panel__body {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
  background: var(--bg-section);
}

.ai-gw-panel__frame {
  flex: 1;
  width: 100%;
  min-height: min(70vh, 560px);
  border: 0;
  background: #fff;
}

@media (max-width: 480px) {
  .ai-gw-panel {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .ai-gw-overlay,
  .ai-gw-panel {
    transition-duration: 0.01ms !important;
  }
}