/* ==========================================================================
   V2RayHelp 官网样式
   风格基调：简洁、专业、可信（参考主流开源项目官网），非"暗色科技营销站"
   ========================================================================== */

:root {
  --color-brand: #2554e0;
  --color-brand-dark: #1b3fb8;
  --color-brand-light: #eef3ff;
  --color-brand-light-2: #e0e9ff;
  --color-accent: #0d9488;
  --color-accent-light: #e6f7f5;
  --color-ink: #0f172a;
  --color-ink-soft: #4b5768;
  --color-ink-faint: #97a1b0;
  --color-bg: #ffffff;
  --color-bg-alt: #f7f9fc;
  --color-border: #e6e9f0;
  --color-border-soft: #eef1f6;
  --color-success: #16a34a;
  /* 中性"芯片"色：用于图标底色、标签、导航态等大面积重复出现的元素，
     避免整站被同一个品牌蓝铺满而显得单调；品牌蓝保留给按钮、链接、图标本身等
     真正需要强调的地方，通过"克制使用"反而更突出、更显质感 */
  --color-chip-bg: #eef1f6;
  --color-chip-bg-2: #e4e8f0;
  --color-chip-ink: #55617a;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --shadow-card: 0 1px 2px rgba(15, 23, 42, 0.04), 0 8px 24px -12px rgba(15, 23, 42, 0.12);
  --shadow-card-hover: 0 4px 10px rgba(15, 23, 42, 0.06), 0 20px 36px -14px rgba(15, 23, 42, 0.18);
  --shadow-header: 0 1px 0 rgba(15, 23, 42, 0.06), 0 12px 24px -18px rgba(15, 23, 42, 0.25);
  --max-width: 1120px;
  --ease: cubic-bezier(0.2, 0.65, 0.3, 1);
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--color-ink);
  background: var(--color-bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

h1, h2, h3, h4 {
  margin: 0;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.015em;
}

p {
  margin: 0;
}

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

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 1000;
  background: var(--color-brand);
  color: #fff;
  padding: 12px 20px;
  border-radius: 0 0 var(--radius-sm) 0;
  font-weight: 600;
}

.skip-link:focus {
  left: 0;
}

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

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.03em;
  color: var(--color-chip-ink);
  background: var(--color-chip-bg);
  padding: 7px 16px 7px 12px;
  border-radius: 999px;
}

.eyebrow::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: var(--color-brand);
  flex-shrink: 0;
}

.section-head {
  max-width: 640px;
  margin: 0 auto 44px;
  text-align: center;
}

.section-head h2 {
  margin-top: 16px;
  font-size: clamp(24px, 3vw, 32px);
}

.section-head p {
  margin-top: 14px;
  color: var(--color-ink-soft);
  font-size: 16px;
}

section {
  padding: 84px 0;
}

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

/* 文章型页面（教程等）内容连续，区块之间不需要跟首页板块一样大的留白 */
section.section-tight {
  padding: 40px 0;
}

/* ---------------------------------- 按钮 ---------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 15px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.2s var(--ease), box-shadow 0.2s var(--ease), background-color 0.2s var(--ease),
    border-color 0.2s var(--ease), color 0.2s var(--ease);
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-brand) 0%, var(--color-brand-dark) 100%);
  color: #fff;
  box-shadow: 0 8px 20px -10px rgba(37, 84, 224, 0.4);
}

.btn-primary:hover {
  box-shadow: 0 12px 26px -10px rgba(37, 84, 224, 0.45);
  transform: translateY(-2px);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  background: #fff;
  color: var(--color-ink);
  border-color: var(--color-border);
}

.btn-secondary:hover {
  border-color: var(--color-brand);
  color: var(--color-brand);
  transform: translateY(-2px);
}

.btn-block {
  width: 100%;
}

.btn-sm {
  padding: 9px 18px;
  font-size: 13.5px;
}

/* ---------------------------------- 头部 ---------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow 0.25s var(--ease), background-color 0.25s var(--ease);
}

.site-header.is-scrolled {
  background: rgba(255, 255, 255, 0.96);
  box-shadow: var(--shadow-header);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
  gap: 16px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 19px;
  font-weight: 800;
  color: var(--color-ink);
  flex-shrink: 0;
  letter-spacing: -0.02em;
}

.logo .logo-mark {
  width: 32px;
  height: 32px;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 2px;
}

.main-nav a {
  display: block;
  padding: 10px 15px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 15px;
  color: var(--color-ink-soft);
  transition: color 0.15s ease, background-color 0.15s ease;
}

.main-nav a:hover,
.main-nav a:focus-visible {
  color: var(--color-brand);
  background: var(--color-chip-bg);
}

.main-nav a[aria-current="page"] {
  color: var(--color-brand);
  background: var(--color-chip-bg);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.header-search {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  color: var(--color-ink-soft);
  flex-shrink: 0;
  transition: border-color 0.15s ease, color 0.15s ease;
}

.header-search:hover,
.header-search[aria-current="page"] {
  border-color: var(--color-brand);
  color: var(--color-brand);
}

/* 语言切换（无 JS 也可用：details/summary） */
.lang-switch {
  position: relative;
}

.lang-switch summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 9px 14px;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  font-size: 14px;
  font-weight: 600;
  color: var(--color-ink-soft);
  user-select: none;
  transition: border-color 0.15s ease, color 0.15s ease;
}

.lang-switch summary::-webkit-details-marker {
  display: none;
}

.lang-switch summary:hover {
  border-color: var(--color-brand);
  color: var(--color-brand);
}

.lang-switch[open] summary {
  border-color: var(--color-brand);
  color: var(--color-brand);
}

.lang-menu {
  position: absolute;
  right: 0;
  top: calc(100% + 10px);
  min-width: 190px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card-hover);
  padding: 6px;
}

.lang-menu li a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 9px 12px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--color-ink);
}

.lang-menu li a:hover {
  background: var(--color-bg-alt);
}

.lang-menu li a[aria-current="true"] {
  color: var(--color-brand);
  font-weight: 700;
  background: var(--color-brand-light);
}

.lang-menu .lang-soon {
  font-size: 12px;
  color: var(--color-ink-faint);
  font-weight: 500;
}

/* 移动端导航（纯 CSS，无需 JS，内容始终在 DOM 中，利于抓取） */
.nav-toggle {
  display: none;
}

/* 导航展开时锁住页面滚动，避免手指划动时把背后的正文一起滚动，
   造成"导航下面的内容跟着动"的穿透感；不支持 :has() 的旧浏览器
   会优雅降级为可以看到背后滚动，但遮罩层仍然会挡住内容。
   注意：这里锁的是 body 而不是 html —— 头部是 position:sticky，
   如果把 overflow:hidden 加在 html 上会打断它的 sticky 定位计算，
   在页面已经往下滚动的情况下，头部（连同挂在它下面的下拉菜单）会
   直接跳到滚动前的位置，也就是视口外面，导致菜单"消失"且滚动被锁死 */
html:has(#nav-toggle:checked) body {
  overflow: hidden;
}

.nav-toggle-label {
  display: none;
  width: 40px;
  height: 40px;
  flex-shrink: 0;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

/* 展开导航时盖住页面其余部分的遮罩：既能让"内容在滚动时穿透到导航后面"
   的问题消失（下面全部盖住，不会露出背后的内容），点击遮罩也能收起导航 */
.nav-backdrop {
  display: none;
  position: fixed;
  /* 用显式 height:100vh 而不是 bottom:0：父级 .site-header 有
     backdrop-filter，会给 fixed 元素创建新的包含块，此时 bottom:0
     是相对 70px 高的头部算的，会导致高度直接变成 0，元素形同不存在 */
  top: 70px;
  left: 0;
  right: 0;
  height: 100vh;
  background: rgba(15, 23, 42, 0.32);
  opacity: 0;
  z-index: 90;
  transition: opacity 0.25s ease;
  pointer-events: none;
}

.nav-toggle-label span,
.nav-toggle-label span::before,
.nav-toggle-label span::after {
  content: "";
  display: block;
  width: 18px;
  height: 2px;
  background: var(--color-ink);
  position: relative;
  transition: all 0.2s ease;
}

.nav-toggle-label span::before {
  position: absolute;
  top: -6px;
}

.nav-toggle-label span::after {
  position: absolute;
  top: 6px;
}

/* ---------------------------------- Hero ---------------------------------- */

.hero {
  position: relative;
  padding: 76px 0 68px;
  background: linear-gradient(180deg, #f4f7ff 0%, #ffffff 78%);
  overflow: hidden;
}

.hero::before,
.hero::after {
  content: "";
  position: absolute;
  border-radius: 999px;
  filter: blur(70px);
  z-index: 0;
  pointer-events: none;
}

.hero::before {
  width: 480px;
  height: 480px;
  top: -220px;
  right: -160px;
  background: radial-gradient(circle, rgba(37, 84, 224, 0.14), rgba(37, 84, 224, 0) 70%);
}

.hero::after {
  width: 380px;
  height: 380px;
  bottom: -200px;
  left: -140px;
  background: radial-gradient(circle, rgba(13, 148, 136, 0.12), rgba(13, 148, 136, 0) 70%);
}

.hero-particles {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  display: block;
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 48px;
  align-items: center;
}

.hero-copy h1 {
  font-size: clamp(30px, 4.2vw, 45px);
  margin-top: 20px;
}

.hero-copy .accent {
  background: linear-gradient(135deg, var(--color-brand) 0%, var(--color-accent) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-copy .lede {
  margin-top: 20px;
  font-size: 17px;
  color: var(--color-ink-soft);
  max-width: 54ch;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 30px;
}

.hero-version {
  margin-top: 14px;
  font-size: 13px;
  color: var(--color-ink-faint);
}

.trust-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 22px;
  margin-top: 34px;
  padding-top: 26px;
  border-top: 1px solid var(--color-border);
}

.trust-badges li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-ink-soft);
}

.trust-badges svg {
  width: 18px;
  height: 18px;
  color: var(--color-success);
  flex-shrink: 0;
}

.hero-panel {
  position: relative;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card-hover);
  padding: 28px;
}

.hero-panel-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 12px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--color-border);
}

.hero-panel-label {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-ink);
}

.hero-panel-clients {
  font-size: 12.5px;
  color: var(--color-ink-faint);
}

.hero-panel-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 10px;
  padding: 24px 0 22px;
}

.hero-panel-grid li {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  text-align: center;
}

.hero-panel-grid .icon-badge {
  width: 42px;
  height: 42px;
}

.hero-panel-grid .icon-badge svg {
  width: 20px;
  height: 20px;
}

.hero-panel-grid span {
  font-size: 12.5px;
  font-weight: 600;
  color: var(--color-ink-soft);
}

.hero-panel-link {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding-top: 20px;
  border-top: 1px solid var(--color-border);
  font-weight: 700;
  font-size: 14.5px;
  color: var(--color-brand);
}

.hero-panel-link svg {
  width: 16px;
  height: 16px;
  transition: transform 0.2s ease;
}

.hero-panel-link:hover svg {
  transform: translateX(3px);
}

/* ---------------------------------- 子页面头部（下载页等通用） ---------------------------------- */

.page-header {
  position: relative;
  padding: 40px 0 44px;
  background: linear-gradient(180deg, #f4f7ff 0%, #ffffff 100%);
  border-bottom: 1px solid var(--color-border);
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13.5px;
  color: var(--color-ink-faint);
  margin-bottom: 20px;
}

.breadcrumb a {
  color: var(--color-ink-soft);
  font-weight: 600;
  transition: color 0.15s ease;
}

.breadcrumb a:hover {
  color: var(--color-brand);
}

.breadcrumb svg {
  width: 13px;
  height: 13px;
  color: var(--color-ink-faint);
  flex-shrink: 0;
}

.page-header h1 {
  font-size: clamp(26px, 3.6vw, 38px);
  max-width: 46ch;
}

.page-header .lede {
  margin-top: 16px;
  font-size: 16px;
  color: var(--color-ink-soft);
  max-width: 64ch;
}

.page-header .hero-version {
  margin-top: 16px;
}

.search-box {
  position: relative;
  margin-top: 28px;
  max-width: 560px;
}

.search-box-icon {
  position: absolute;
  left: 18px;
  top: 50%;
  transform: translateY(-50%);
  width: 18px;
  height: 18px;
  color: var(--color-ink-faint);
  pointer-events: none;
}

.search-box input {
  width: 100%;
  padding: 15px 18px 15px 48px;
  font-size: 16px; /* >=16px 避免 iOS Safari 聚焦输入框时自动放大页面 */
  font-family: inherit;
  color: var(--color-ink);
  background: #fff;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: 0 8px 20px -12px rgba(15, 23, 42, 0.12);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.search-box input::placeholder {
  color: var(--color-ink-faint);
}

.search-box input:focus {
  outline: none;
  border-color: var(--color-brand);
  box-shadow: 0 0 0 3px rgba(37, 84, 224, 0.14);
}

.search-status {
  min-height: 20px;
  margin-bottom: 6px;
  font-size: 14px;
  color: var(--color-ink-soft);
}

.search-status:empty {
  margin-bottom: 0;
}

.platform-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}

.platform-jump a {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 7px 16px 7px 8px;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  background: #fff;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-ink-soft);
  transition: border-color 0.15s ease, color 0.15s ease, background-color 0.15s ease;
}

.platform-jump a .icon-badge {
  width: 26px;
  height: 26px;
  border-radius: 999px;
}

.platform-jump a .icon-badge svg {
  width: 14px;
  height: 14px;
}

.platform-jump a:hover,
.platform-jump a:focus-visible {
  border-color: var(--color-brand);
  color: var(--color-brand);
  background: var(--color-chip-bg);
}

/* ---------------------------------- 下载中心 ---------------------------------- */

.download-section {
  padding: 44px 0;
  scroll-margin-top: 84px;
}

.download-head {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-bottom: 24px;
}

.download-head .icon-badge {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
}

.download-head .icon-badge svg {
  width: 26px;
  height: 26px;
}

.download-head h2 {
  font-size: clamp(21px, 2.4vw, 26px);
}

.download-head p {
  margin-top: 4px;
  font-size: 14.5px;
  color: var(--color-ink-soft);
}

.download-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 30px 32px;
  box-shadow: var(--shadow-card);
}

.version-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 700;
  color: var(--color-ink);
  background: var(--color-chip-bg);
  padding: 6px 14px 6px 10px;
  border-radius: 999px;
  margin-bottom: 18px;
}

.version-badge .dot {
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: var(--color-success);
  flex-shrink: 0;
}

.download-btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 4px;
}

.download-meta {
  margin-top: 16px;
  font-size: 13px;
  color: var(--color-ink-faint);
}

.download-choice {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--color-border-soft);
  font-size: 14px;
  color: var(--color-ink-soft);
  line-height: 1.8;
}

.download-choice strong {
  color: var(--color-ink);
}

.ios-note {
  display: flex;
  gap: 18px;
  align-items: flex-start;
  background: var(--color-bg-alt);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-lg);
  padding: 26px 28px;
}

.ios-note .icon-badge {
  flex-shrink: 0;
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
}

.ios-note .icon-badge svg {
  width: 24px;
  height: 24px;
}

.ios-note h3 {
  font-size: 16.5px;
  margin-bottom: 8px;
}

.ios-note p {
  font-size: 14.5px;
  color: var(--color-ink-soft);
}

.ios-note p + p {
  margin-top: 8px;
}

.ios-note a {
  color: var(--color-brand);
  font-weight: 700;
}

/* ---------------------------------- 平台下载 ---------------------------------- */

.platform-list {
  border-top: 1px solid var(--color-border);
}

.platform-row {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 22px 14px;
  margin: 0 -14px;
  border-radius: var(--radius-md);
  border-bottom: 1px solid var(--color-border);
  transition: background-color 0.2s ease;
}

.platform-row:hover {
  background: #fff;
}

.icon-badge {
  width: 46px;
  height: 46px;
  border-radius: var(--radius-sm);
  background: linear-gradient(160deg, #fbfcfd 0%, #ffffff 100%);
  border: 1px solid var(--color-border-soft);
  color: var(--color-brand);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.03);
  transition: transform 0.2s var(--ease), border-color 0.2s ease, box-shadow 0.2s ease;
}

.icon-badge svg {
  width: 22px;
  height: 22px;
}

.platform-row:hover .icon-badge {
  border-color: var(--color-brand-light-2);
  box-shadow: 0 4px 10px -4px rgba(37, 84, 224, 0.25);
  transform: scale(1.06);
}

/* 特性卡片图标在蓝色主色之外轮换少量深靑/石墨色，制造克制的层次而非单色铺满 */
.features-grid .feature-card:nth-child(3n+2) .icon-badge {
  color: var(--color-accent);
}

.features-grid .feature-card:nth-child(3n+3) .icon-badge {
  color: #56607a;
}

.platform-row .platform-main {
  flex: 1 1 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 12px;
  min-width: 0;
}

.platform-row h3 {
  font-size: 16.5px;
}

.platform-row .platform-client {
  font-size: 13.5px;
  color: var(--color-ink-faint);
}

.platform-row .platform-note {
  flex-basis: 100%;
  font-size: 13.5px;
  color: var(--color-ink-soft);
}

.platform-row .btn {
  flex-shrink: 0;
}

.platform-more {
  text-align: center;
  margin-top: 28px;
  font-size: 15px;
  color: var(--color-ink-soft);
}

.platform-more a {
  color: var(--color-brand);
  font-weight: 700;
}

/* ---------------------------------- 对比与适用人群 ---------------------------------- */

.compare-table {
  border-top: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.compare-row {
  display: grid;
  grid-template-columns: 140px 1fr 1fr;
  gap: 24px;
  padding: 20px 16px;
  margin: 0 -16px;
  border-bottom: 1px solid var(--color-border);
  transition: background-color 0.2s ease;
}

.compare-row:not(.compare-head):hover {
  background: var(--color-bg-alt);
}

.compare-row.compare-head {
  padding-top: 4px;
  padding-bottom: 16px;
}

.compare-row.compare-head span {
  font-size: 13px;
  font-weight: 700;
  color: var(--color-ink-faint);
  letter-spacing: 0.02em;
}

.compare-row.compare-head span:nth-child(2) {
  color: var(--color-brand);
}

.compare-row.compare-head span:nth-child(3) {
  color: var(--color-ink-soft);
}

.compare-dim {
  font-weight: 700;
  font-size: 14.5px;
  color: var(--color-ink);
}

.compare-row span:not(.compare-dim) {
  font-size: 14px;
  color: var(--color-ink-soft);
  line-height: 1.65;
}

.compare-note {
  margin-top: 22px;
  font-size: 13.5px;
  color: var(--color-ink-faint);
  line-height: 1.75;
  max-width: 860px;
}

.section-head-tight {
  margin-top: 60px;
  margin-bottom: 32px;
}

.persona-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px 44px;
}

.persona-list li {
  position: relative;
  padding-left: 20px;
}

.persona-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 5px;
  width: 3px;
  height: calc(100% - 10px);
  min-height: 18px;
  border-radius: 999px;
  background: linear-gradient(180deg, var(--color-brand), var(--color-accent));
}

.persona-list h3 {
  font-size: 16px;
  margin-bottom: 6px;
}

.persona-list p {
  font-size: 14px;
  color: var(--color-ink-soft);
}

/* ---------------------------------- 特性 ---------------------------------- */

.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px 24px;
}

.feature-card {
  padding: 4px;
}

.feature-card .icon-badge {
  margin-bottom: 18px;
}

.feature-card h3 {
  font-size: 16.5px;
  margin-bottom: 8px;
}

.feature-card p {
  font-size: 14px;
  color: var(--color-ink-soft);
}

/* ---------------------------------- 教程 ---------------------------------- */

.tutorial-list {
  border-top: 1px solid var(--color-border);
}

.tutorial-row {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 26px 14px;
  margin: 0 -14px;
  border-radius: var(--radius-md);
  border-bottom: 1px solid var(--color-border);
  transition: background-color 0.2s ease;
}

.tutorial-row:hover {
  background: #fff;
}

.tutorial-row .tutorial-tag {
  flex-shrink: 0;
  width: 96px;
  font-size: 12.5px;
  font-weight: 700;
  color: var(--color-accent);
}

.tutorial-row .tutorial-main {
  flex: 1 1 auto;
  min-width: 0;
}

.tutorial-row h3 {
  font-size: 17px;
}

.tutorial-row p {
  margin-top: 4px;
  font-size: 14.5px;
  color: var(--color-ink-soft);
}

.tutorial-row .tutorial-link {
  flex-shrink: 0;
  font-weight: 700;
  color: var(--color-brand);
  font-size: 14.5px;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  transition: gap 0.2s ease;
}

.tutorial-row .tutorial-link svg {
  width: 15px;
  height: 15px;
  transition: transform 0.2s ease;
}

.tutorial-row:hover .tutorial-link svg {
  transform: translateX(3px);
}

.section-cta {
  text-align: center;
  margin-top: 36px;
}

/* ---------------------------------- FAQ ---------------------------------- */

.faq-list {
  max-width: 760px;
  margin: 0 auto;
  border-top: 1px solid var(--color-border);
}

.faq-item {
  border-bottom: 1px solid var(--color-border);
  transition: background-color 0.2s ease;
}

.faq-item summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 21px 4px;
  font-weight: 700;
  font-size: 15.5px;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary:hover {
  color: var(--color-brand);
}

.faq-question {
  flex: 1 1 auto;
}

.faq-icon {
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  border-radius: 999px;
  background: var(--color-chip-bg);
  color: var(--color-chip-ink);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.25s var(--ease), background-color 0.2s ease, color 0.2s ease;
}

.faq-item[open] .faq-icon {
  background: var(--color-brand-light);
  color: var(--color-brand);
}

.faq-icon svg {
  width: 13px;
  height: 13px;
}

.faq-item[open] .faq-icon {
  transform: rotate(135deg);
}

.faq-item p {
  padding: 0 4px 22px;
  color: var(--color-ink-soft);
  font-size: 14.5px;
  max-width: 66ch;
}

/* ---------------------------------- 博客预览 ---------------------------------- */

.blog-list {
  border-top: 1px solid var(--color-border);
}

.blog-list:empty {
  border-top: none;
}

.blog-row {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 24px;
  padding: 24px 14px;
  margin: 0 -14px;
  border-radius: var(--radius-md);
  border-bottom: 1px solid var(--color-border);
  transition: background-color 0.2s ease;
}

.blog-row:hover {
  background: #fff;
}

.blog-row:hover h3 {
  color: var(--color-brand);
}

.blog-row-link {
  position: absolute;
  inset: 0;
  z-index: 0;
  border-radius: var(--radius-md);
}

.blog-meta {
  position: relative;
  flex-shrink: 0;
  width: 130px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 12.5px;
  color: var(--color-ink-faint);
}

.blog-meta .blog-cat {
  color: var(--color-brand);
  font-weight: 700;
}

.blog-row .blog-main {
  position: relative;
  flex: 1 1 auto;
  min-width: 0;
}

.blog-row h3 {
  font-size: 16.5px;
  transition: color 0.15s ease;
}

.blog-row p {
  margin-top: 4px;
  font-size: 14px;
  color: var(--color-ink-soft);
}

.blog-row-arrow {
  position: relative;
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  color: var(--color-ink-faint);
  align-self: center;
  transition: color 0.15s ease, transform 0.15s ease;
}

.blog-row:hover .blog-row-arrow {
  color: var(--color-brand);
  transform: translateX(3px);
}

/* ---------------------------------- 文章正文页 ---------------------------------- */

.article-byline {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 18px;
  font-size: 13.5px;
  color: var(--color-ink-faint);
}

.article-byline .dot {
  width: 3px;
  height: 3px;
  border-radius: 999px;
  background: var(--color-ink-faint);
}

.article-lead-para {
  font-size: 16.5px;
  color: var(--color-ink-soft);
  line-height: 1.8;
  max-width: 720px;
}

.article-body {
  max-width: 720px;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--color-ink-soft);
}

.article-body h2 {
  font-size: clamp(20px, 2.2vw, 23px);
  color: var(--color-ink);
  margin-top: 40px;
  margin-bottom: 14px;
}

.article-body h2:first-child {
  margin-top: 0;
}

.article-body p {
  margin-top: 14px;
}

.article-body ul,
.article-body ol {
  margin-top: 14px;
  padding-left: 22px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.article-body li {
  padding-left: 4px;
}

.article-body strong {
  color: var(--color-ink);
}

.article-body code {
  background: var(--color-chip-bg);
  color: var(--color-ink);
  padding: 2px 6px;
  border-radius: 5px;
  font-size: 13.5px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.article-dl-card {
  margin-top: 44px;
  max-width: 720px;
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 26px 28px;
  border-radius: var(--radius-lg);
  background: linear-gradient(160deg, var(--color-brand-light) 0%, #fff 100%);
  border: 1px solid var(--color-brand-light-2);
}

.article-dl-card .icon-badge {
  flex-shrink: 0;
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background: #fff;
}

.article-dl-card .icon-badge svg {
  width: 24px;
  height: 24px;
}

.article-dl-card-text {
  flex: 1 1 auto;
  min-width: 0;
}

.article-dl-card-text h3 {
  font-size: 16.5px;
  color: var(--color-ink);
}

.article-dl-card-text p {
  margin-top: 4px;
  font-size: 14px;
  color: var(--color-ink-soft);
}

.article-dl-card .btn {
  flex-shrink: 0;
}

.dl-float {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 500;
  display: flex;
  align-items: center;
  gap: 12px;
  max-width: 290px;
  padding: 14px 16px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 44px -14px rgba(15, 23, 42, 0.25);
}

.js .dl-float {
  opacity: 0;
  transform: translateY(18px);
  pointer-events: none;
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.js .dl-float.is-visible {
  opacity: 1;
  transform: none;
  pointer-events: auto;
}

.dl-float-close {
  position: absolute;
  top: -9px;
  right: -9px;
  width: 22px;
  height: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  background: var(--color-ink);
  color: #fff;
  font-size: 13px;
  line-height: 1;
  border: none;
  cursor: pointer;
}

.dl-float-icon {
  flex-shrink: 0;
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  background: var(--color-brand-light);
  color: var(--color-brand);
  display: flex;
  align-items: center;
  justify-content: center;
}

.dl-float-icon svg {
  width: 18px;
  height: 18px;
}

.dl-float-text {
  flex: 1 1 auto;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.dl-float-text strong {
  font-size: 13.5px;
  color: var(--color-ink);
}

.dl-float-text span {
  font-size: 12px;
  color: var(--color-ink-faint);
}

.dl-float-btn {
  flex-shrink: 0;
  padding: 8px 14px;
  font-size: 13px;
}

.related-posts {
  margin-top: 22px;
  display: flex;
  flex-direction: column;
}

/* ---------------------------------- 教程 / 长文章排版 ---------------------------------- */

.article-toc {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
}

.article-toc-label {
  width: 100%;
  font-size: 13px;
  font-weight: 700;
  color: var(--color-ink-faint);
  margin-bottom: 2px;
}

.article-toc a {
  display: inline-flex;
  align-items: center;
  padding: 7px 15px;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  background: #fff;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--color-ink-soft);
  transition: border-color 0.15s ease, color 0.15s ease, background-color 0.15s ease;
}

.article-toc a:hover,
.article-toc a:focus-visible {
  border-color: var(--color-brand);
  color: var(--color-brand);
  background: var(--color-chip-bg);
}

.article-section {
  max-width: 760px;
  margin: 0 auto;
  scroll-margin-top: 84px;
}

.article-section + .article-section {
  margin-top: 56px;
}

.article-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 700;
  color: var(--color-chip-ink);
  margin-bottom: 10px;
}

.article-kicker .num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 999px;
  background: var(--color-ink);
  color: #fff;
  font-size: 12px;
}

.article-section h2 {
  font-size: clamp(21px, 2.4vw, 25px);
}

.article-section > p.article-lede {
  margin-top: 12px;
  font-size: 15.5px;
  color: var(--color-ink-soft);
}

.concept-list {
  margin-top: 24px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.concept-list > div {
  padding: 20px 22px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.concept-list h3 {
  font-size: 15.5px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.concept-list h3::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: var(--color-brand);
  flex-shrink: 0;
}

.concept-list p {
  margin-top: 8px;
  font-size: 14.5px;
  color: var(--color-ink-soft);
  line-height: 1.75;
}

.step-list {
  margin-top: 22px;
  display: flex;
  flex-direction: column;
}

.step-list > div {
  display: flex;
  gap: 18px;
  padding: 20px 0;
  border-top: 1px solid var(--color-border-soft);
}

.step-list > div:first-child {
  border-top: none;
  padding-top: 4px;
}

.step-num {
  flex-shrink: 0;
  width: 30px;
  height: 30px;
  border-radius: 999px;
  background: var(--color-ink);
  color: #fff;
  font-size: 13.5px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.step-body h3 {
  font-size: 15.5px;
  margin-bottom: 6px;
}

.step-body p {
  font-size: 14.5px;
  color: var(--color-ink-soft);
  line-height: 1.75;
}

.step-body code {
  background: var(--color-chip-bg);
  color: var(--color-ink);
  padding: 2px 6px;
  border-radius: 5px;
  font-size: 13px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.callout {
  margin-top: 22px;
  display: flex;
  gap: 14px;
  padding: 18px 20px;
  border-radius: var(--radius-md);
  border-left: 3px solid var(--color-brand);
  background: var(--color-bg-alt);
}

.callout .icon-badge {
  flex-shrink: 0;
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
}

.callout .icon-badge svg {
  width: 17px;
  height: 17px;
}

.callout h4 {
  font-size: 14.5px;
  margin-bottom: 4px;
}

.callout p {
  font-size: 14px;
  color: var(--color-ink-soft);
  line-height: 1.75;
}

.callout.callout-warn {
  border-left-color: #d97706;
}

.callout.callout-warn .icon-badge {
  color: #d97706;
}

.mode-list {
  margin-top: 22px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.mode-list > div {
  padding: 20px 22px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: #fff;
}

.mode-list > div.is-recommended {
  border-color: var(--color-brand-light-2);
  box-shadow: 0 4px 14px -8px rgba(37, 84, 224, 0.25);
}

.mode-title {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.mode-title h3 {
  font-size: 15.5px;
}

.mode-tag {
  font-size: 12px;
  font-weight: 700;
  color: var(--color-brand);
  background: var(--color-brand-light);
  padding: 3px 10px;
  border-radius: 999px;
}

.mode-list p {
  margin-top: 8px;
  font-size: 14.5px;
  color: var(--color-ink-soft);
  line-height: 1.75;
}

.tip-grid {
  margin-top: 22px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px 24px;
}

.tip-grid h3 {
  font-size: 15px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.tip-grid h3 .icon-badge {
  width: 30px;
  height: 30px;
  border-radius: var(--radius-sm);
}

.tip-grid h3 .icon-badge svg {
  width: 15px;
  height: 15px;
}

.tip-grid p {
  margin-top: 8px;
  font-size: 14px;
  color: var(--color-ink-soft);
  line-height: 1.75;
  padding-left: 40px;
}

.article-divider {
  margin: 64px 0;
  border: none;
  border-top: 1px solid var(--color-border);
}

/* ---------------------------------- CTA Banner ---------------------------------- */

.cta-banner {
  position: relative;
  background: linear-gradient(135deg, var(--color-brand) 0%, #16277a 100%);
  border-radius: var(--radius-lg);
  padding: 56px 40px;
  text-align: center;
  color: #fff;
  margin: 0 24px;
  max-width: calc(var(--max-width) - 48px);
  margin-inline: auto;
  overflow: hidden;
}

.cta-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255, 255, 255, 0.14) 1.5px, transparent 1.5px);
  background-size: 22px 22px;
  mask-image: radial-gradient(ellipse at center, black 20%, transparent 75%);
}

.cta-banner > * {
  position: relative;
}

.cta-banner h2 {
  font-size: clamp(22px, 3vw, 30px);
  color: #fff;
}

.cta-banner p {
  margin-top: 12px;
  color: rgba(255, 255, 255, 0.85);
  font-size: 15.5px;
}

.cta-banner .hero-actions {
  justify-content: center;
  margin-top: 30px;
}

.cta-banner .btn-secondary {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.4);
}

.cta-banner .btn-secondary:hover {
  background: rgba(255, 255, 255, 0.18);
  border-color: #fff;
  color: #fff;
}

.cta-banner .btn-primary {
  background: #fff;
  color: var(--color-brand-dark);
  box-shadow: none;
}

.cta-banner .btn-primary:hover {
  background: #f1f5ff;
}

/* ---------------------------------- 页脚 ---------------------------------- */

.site-footer {
  position: relative;
  background: var(--color-ink);
  color: #cbd5e1;
  padding: 60px 0 30px;
  margin-top: 0;
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-brand), var(--color-accent));
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr repeat(4, 1fr);
  gap: 28px;
}

.footer-brand .logo {
  color: #fff;
}

.footer-brand p {
  margin-top: 14px;
  font-size: 13.5px;
  color: #94a3b8;
  max-width: 34ch;
}

.footer-col h4 {
  color: #fff;
  font-size: 14px;
  margin-bottom: 16px;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 11px;
}

.footer-col a {
  font-size: 14px;
  color: #94a3b8;
  transition: color 0.15s ease;
}

.footer-col a:hover {
  color: #fff;
}

.footer-bottom {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: space-between;
  align-items: center;
  font-size: 12.5px;
  color: #64748b;
}

.footer-disclaimer {
  font-size: 12.5px;
  color: #64748b;
  max-width: 900px;
  line-height: 1.8;
  margin-top: 8px;
}

/* ---------------------------------- 滚动渐入（渐进增强，无 JS 时默认可见） ---------------------------------- */

.js .reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}

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

/* ---------------------------------- 响应式 ---------------------------------- */

@media (max-width: 960px) {
  .hero-inner {
    grid-template-columns: 1fr;
  }

  .hero-panel {
    max-width: 460px;
    margin: 0 auto;
  }

  /* 这两个模糊光斑是给桌面端宽屏留白区域做的装饰，尺寸是按宽屏比例设计的；
     窄屏下 hero-panel 会整个移到顶部、居中显示，光斑相对面板显得过大，
     会在卡片四周透出一圈"幽灵卡片"般的光晕，看起来像渲染错误。
     这里按比例缩小并往角落外移，让它们回到"背景里不起眼的点缀"该有的样子 */
  .hero::before {
    width: 260px;
    height: 260px;
    top: -120px;
    right: -110px;
  }

  .hero::after {
    width: 220px;
    height: 220px;
    bottom: -100px;
    left: -100px;
  }

  .download-card {
    padding: 26px 24px;
  }

  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .persona-list {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }

  .tip-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .nav-toggle-label {
    display: flex;
  }

  .main-nav {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    z-index: 95;
    background: #fff;
    border-bottom: 0 solid var(--color-border);
    flex-direction: column;
    align-items: stretch;
    padding: 0 16px;
    gap: 2px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.25s ease, padding 0.25s ease;
  }

  .main-nav a {
    padding: 12px 10px;
    border-radius: var(--radius-sm);
    border-bottom: 1px solid var(--color-bg-alt);
  }

  .nav-toggle:checked ~ .main-nav {
    max-height: min(320px, calc(100vh - 70px));
    padding: 8px 16px 16px;
    overflow-y: auto;
    border-bottom-width: 1px;
  }

  .nav-toggle:checked ~ .nav-backdrop {
    display: block;
    opacity: 1;
    pointer-events: auto;
  }

  .header-actions .btn-primary.header-cta {
    display: none;
  }

  section {
    padding: 60px 0;
  }

  /* 小屏幕下要让下载按钮尽量在首屏内可见，把 hero 区域的留白和字号
     整体收紧一档，避免标题、段落把按钮挤到首屏以下 */
  .hero {
    padding: 40px 0 30px;
  }

  .hero-copy .eyebrow {
    font-size: 12px;
    padding: 6px 14px 6px 10px;
  }

  .hero-copy h1 {
    font-size: clamp(26px, 7vw, 34px);
    margin-top: 14px;
  }

  .hero-copy .lede {
    margin-top: 12px;
    font-size: 15px;
  }

  .hero-actions {
    margin-top: 20px;
  }

  .hero-version {
    margin-top: 10px;
  }

  .trust-badges {
    margin-top: 20px;
    padding-top: 16px;
    gap: 14px;
  }

  .features-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .platform-row,
  .tutorial-row,
  .blog-row {
    flex-wrap: wrap;
  }

  .compare-row {
    grid-template-columns: 1fr;
    gap: 8px;
    padding: 20px 16px;
  }

  .compare-row.compare-head {
    display: none;
  }

  .compare-row span:not(.compare-dim)::before {
    content: attr(data-label) "：";
    font-weight: 700;
    color: var(--color-ink);
  }

  .tutorial-row .tutorial-link,
  .platform-row .btn {
    width: 100%;
    justify-content: center;
  }

  .blog-meta {
    width: auto;
    flex-direction: row;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .cta-banner {
    padding: 44px 26px;
    margin: 0 16px;
  }

  .download-head {
    gap: 14px;
  }

  .download-head .icon-badge {
    width: 46px;
    height: 46px;
  }

  .ios-note {
    flex-direction: column;
  }

  .download-btn-group .btn {
    flex: 1 1 auto;
  }

  .step-list > div {
    gap: 14px;
  }

  .callout {
    flex-direction: column;
  }

  .article-divider {
    margin: 44px 0;
  }

  .article-dl-card {
    flex-direction: column;
    text-align: center;
    padding: 24px 20px;
  }

  .article-dl-card .btn {
    width: 100%;
    justify-content: center;
  }

  .dl-float {
    right: 12px;
    bottom: 12px;
    max-width: none;
    width: calc(100% - 24px);
    padding: 12px 14px;
  }

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

  .dl-float-text span {
    display: none;
  }
}

@media (max-width: 420px) {
  .container {
    padding: 0 16px;
  }

  .hero {
    padding: 36px 0 28px;
  }

  .hero-panel {
    padding: 22px;
  }

  .hero-panel-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 18px 10px;
  }

  /* 超窄屏幕：logo + 搜索 + 语言切换 + 汉堡菜单要挤在一行，
     整体收紧间距和字号，避免整行溢出 */
  .header-inner {
    gap: 6px;
  }

  .logo {
    font-size: 15px;
    gap: 6px;
  }

  .logo .logo-mark {
    width: 24px;
    height: 24px;
  }

  .header-actions {
    gap: 4px;
  }

  .header-search {
    width: 34px;
    height: 34px;
    flex-shrink: 0;
  }

  .lang-switch summary {
    padding: 8px 10px;
    font-size: 13px;
  }

  .nav-toggle-label {
    width: 34px;
    height: 34px;
  }

  /* 少数按钮文案比较长（如"下载 Apple Silicon 版"），超窄屏幕下
     不再强制单行，允许换行为两行，避免把按钮撑出容器 */
  .btn {
    white-space: normal;
    text-align: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

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