/* ---------------------------------------------------------------------------
   Tailwind v4 preflight（内联）
   原 globals.css 首行是 `@import "tailwindcss"`，仅用于取这份重置样式。
   静态包无法在构建期解析该 import，故在此内联等价内容。
   --------------------------------------------------------------------------- */
*,
::after,
::before,
::backdrop,
::file-selector-button {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  border: 0 solid;
}

html,
:host {
  line-height: 1.5;
  -webkit-text-size-adjust: 100%;
  tab-size: 4;
  font-family: ui-sans-serif, system-ui, sans-serif, "Apple Color Emoji",
    "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
  font-feature-settings: normal;
  font-variation-settings: normal;
  -webkit-tap-highlight-color: transparent;
}

body {
  line-height: inherit;
}

hr {
  height: 0;
  color: inherit;
  border-top-width: 1px;
}

abbr:where([title]) {
  -webkit-text-decoration: underline dotted;
  text-decoration: underline dotted;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-size: inherit;
  font-weight: inherit;
}

a {
  color: inherit;
  -webkit-text-decoration: inherit;
  text-decoration: inherit;
}

b,
strong {
  font-weight: bolder;
}

code,
kbd,
samp,
pre {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas,
    "Liberation Mono", "Courier New", monospace;
  font-feature-settings: normal;
  font-variation-settings: normal;
  font-size: 1em;
}

small {
  font-size: 80%;
}

sub,
sup {
  font-size: 75%;
  line-height: 0;
  position: relative;
  vertical-align: baseline;
}

sub {
  bottom: -0.25em;
}

sup {
  top: -0.5em;
}

table {
  text-indent: 0;
  border-color: inherit;
  border-collapse: collapse;
}

:-moz-focusring {
  outline: auto;
}

progress {
  vertical-align: baseline;
}

summary {
  display: list-item;
}

ol,
ul,
menu {
  list-style: none;
}

img,
svg,
video,
canvas,
audio,
iframe,
embed,
object {
  display: block;
  vertical-align: middle;
}

img,
video {
  max-width: 100%;
  height: auto;
}

button,
input,
select,
optgroup,
textarea,
::file-selector-button {
  font: inherit;
  font-feature-settings: inherit;
  font-variation-settings: inherit;
  letter-spacing: inherit;
  color: inherit;
  border-radius: 0;
  background-color: transparent;
  opacity: 1;
}

:where(select:is([multiple], [size])) optgroup {
  font-weight: bolder;
}

::placeholder {
  opacity: 1;
  color: color-mix(in oklab, currentcolor 50%, transparent);
}

textarea {
  resize: vertical;
}

::-webkit-search-decoration {
  -webkit-appearance: none;
}

::-webkit-datetime-edit {
  display: inline-flex;
}

::-webkit-datetime-edit-fields-wrapper {
  padding: 0;
}

[hidden]:where(:not([hidden="until-found"])) {
  display: none !important;
}

/* ---------------------------------------------------------------------------
   以下为 app/globals.css 原样内容
   --------------------------------------------------------------------------- */
:root {
  --paper: #f1f0eb;
  --paper-light: #f8f7f3;
  --ink: #171717;
  --muted: #74736e;
  --line: rgba(23, 23, 23, 0.17);
  --blue: #2948d6;
  --night: #111831;
  /* 刘海屏横屏时两侧的安全区宽度,窄屏下从版心里扣掉 */
  --safe: calc(env(safe-area-inset-left, 0px) + env(safe-area-inset-right, 0px));
  --page: min(1380px, calc(100vw - 80px));
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background: var(--paper);
}

body {
  margin: 0;
  overflow-x: hidden;
  background: var(--paper);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC",
    "Helvetica Neue", "Microsoft YaHei", sans-serif;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

::selection {
  background: var(--blue);
  color: #fff;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 1000;
  padding: 10px 14px;
  background: #fff;
  transform: translateY(-160%);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: fixed;
  top: 20px;
  left: 50%;
  z-index: 100;
  width: var(--page);
  min-height: 62px;
  padding: 9px 12px 9px 10px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  border: 1px solid rgba(255, 255, 255, 0.64);
  border-radius: 17px;
  background: rgba(246, 246, 242, 0.68);
  box-shadow: 0 10px 36px rgba(20, 27, 43, 0.07),
    inset 0 1px 0 rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(28px) saturate(145%);
  -webkit-backdrop-filter: blur(28px) saturate(145%);
  transform: translateX(-50%);
}

/* 纯文字字标。原先左侧的单字印已移除，故字号上调补回视觉重量。 */
.brand {
  width: fit-content;
  display: inline-flex;
  align-items: center;
  font-size: 15px;
  font-weight: 620;
  letter-spacing: 0.12em;
  line-height: 1.1;
}

/* 英文副标比中文宽，故让中文相对副标居中对齐。 */
.brand > span:last-child {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
}

/* 副标沿用横版正稿的写法 LINGQIONG TECHNOLOGY。字数由 9 增至 20，
   故收紧字距，避免这行比上方「零穹科技」宽出太多。 */
.brand small {
  color: var(--muted);
  font-size: 7px;
  font-weight: 600;
  letter-spacing: 0.18em;
}

/* 横版正稿·无副标。副标行在 185px 宽度下只有 4px 高，故用 compact 变体。 */
.footer-brand {
  width: fit-content;
  display: block;
}

.footer-brand img {
  width: 185px;
  height: auto;
  display: block;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 38px;
}

.site-nav a,
.nav-products > summary,
.header-link {
  color: #5d5c58;
  font-size: 12px;
  letter-spacing: 0.04em;
  transition: color 180ms ease;
}

/* 触摸目标撑到 44px（iOS/Android 的最小可点尺寸）。
   用内边距撑开点击区,不改变视觉位置 —— 页头内容区正好 44px
   （min-height 62 − 上下 padding 18）,所以行高不会被撑大。 */
.site-nav a,
.nav-products > summary {
  padding: 13px 0;
}

.site-nav a:hover,
.site-nav a:focus-visible,
.nav-products > summary:hover,
.nav-products > summary:focus-visible,
.header-link:hover,
.header-link:focus-visible {
  color: var(--blue);
  outline: none;
}

/* ── 页头「产品」下拉 ───────────────────────────────────────────────
   用原生 <details>/<summary> 实现点击展开:不需要 JS,键盘和读屏器原生支持。
   代价是点击面板外部不会自动收起,那需要 JS。 */
.nav-products {
  position: relative;
}

.nav-products > summary {
  display: flex;
  align-items: center;
  gap: 7px;
  list-style: none;          /* 去掉默认三角 */
  cursor: pointer;
}

.nav-products > summary::-webkit-details-marker {
  display: none;             /* Safari 的默认三角 */
}

/* 自绘折角箭头,展开时翻转 */
.nav-products > summary::after {
  width: 5px;
  height: 5px;
  margin-top: -3px;
  display: block;
  border-right: 1px solid currentColor;
  border-bottom: 1px solid currentColor;
  content: "";
  transform: rotate(45deg);
  transition: transform 200ms ease;
}

.nav-products[open] > summary::after {
  margin-top: 1px;
  transform: rotate(-135deg);
}

.nav-products-panel {
  position: absolute;
  top: calc(100% + 18px);
  left: 50%;
  min-width: 214px;
  padding: 16px 8px 8px;
  border: 1px solid rgba(255, 255, 255, 0.7);
  border-radius: 15px;
  background: rgba(247, 246, 243, 0.97);
  box-shadow: 0 16px 44px rgba(20, 27, 43, 0.13),
    inset 0 1px 0 rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(28px) saturate(145%);
  -webkit-backdrop-filter: blur(28px) saturate(145%);
  transform: translateX(-50%);
}

.nav-products-label {
  margin: 0 0 6px;
  padding: 0 12px;
  color: var(--muted);
  font-size: 8px;
  letter-spacing: 0.24em;
}

.nav-products-panel ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-products-panel a {
  padding: 11px 12px;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  border-radius: 9px;
  transition: background-color 180ms ease, color 180ms ease;
}

.nav-products-panel a > span {
  color: var(--ink);
  font-family: "Songti SC", "STSong", serif;
  font-size: 16px;
  letter-spacing: 0.02em;
}

.nav-products-panel a > small {
  color: var(--muted);
  font-size: 8px;
  letter-spacing: 0.2em;
}

.nav-products-panel a:focus-visible {
  background: rgba(41, 72, 214, 0.07);
  outline: none;
}

.nav-products-panel a:focus-visible > span {
  color: var(--blue);
}

/* hover 态只给真有指针的设备 —— 触屏上 :hover 会在点完后粘住 */
@media (hover: hover) {
  .nav-products-panel a:hover {
    background: rgba(41, 72, 214, 0.07);
  }

  .nav-products-panel a:hover > span {
    color: var(--blue);
  }
}

/* 链接还没填时置灰并禁用点击。填入 href 后这条规则自动失效,无需改别处。 */
.nav-products-panel a[href=""] {
  opacity: 0.42;
  pointer-events: none;
}

.header-link {
  justify-self: end;
  padding-bottom: 4px;
  border-bottom: 1px solid rgba(23, 23, 23, 0.4);
}

.header-link span {
  margin-left: 16px;
}

.hero {
  width: var(--page);
  min-height: 100svh;
  margin: 0 auto;
  padding: 134px 0 34px;
  display: grid;
  grid-template-rows: auto 1fr auto;
}

.hero-meta {
  padding: 13px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-size: 9px;
  font-weight: 580;
  letter-spacing: 0.16em;
}

.hero-main {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(270px, 0.28fr);
  gap: clamp(40px, 7vw, 120px);
  align-items: center;
}

.hero-copy > p {
  margin: 0 0 24px;
  color: var(--blue);
  font-size: 10px;
  font-weight: 650;
  letter-spacing: 0.18em;
}

.hero h1 {
  margin: 0;
  font-family: "Songti SC", "STSong", serif;
  font-size: clamp(72px, 9.5vw, 154px);
  font-weight: 500;
  letter-spacing: -0.075em;
  line-height: 0.97;
}

.hero h1 span {
  display: block;
}

.hero-second-line {
  margin-left: 0.72em;
  color: var(--blue);
}

.hero-aside {
  align-self: stretch;
  padding: clamp(34px, 5vh, 68px) 0;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: space-between;
}

.brand-lens {
  position: relative;
  width: clamp(188px, 17vw, 268px);
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.78);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  box-shadow: inset 14px 18px 40px rgba(255, 255, 255, 0.68),
    inset -18px -22px 48px rgba(72, 99, 175, 0.11),
    0 24px 58px rgba(39, 47, 77, 0.11);
  backdrop-filter: blur(30px) saturate(150%);
  -webkit-backdrop-filter: blur(30px) saturate(150%);
}

.brand-lens::before {
  position: absolute;
  top: 4%;
  left: 14%;
  width: 70%;
  height: 34%;
  border-radius: 50%;
  background: linear-gradient(to bottom, rgba(255, 255, 255, 0.82), transparent);
  content: "";
  filter: blur(7px);
  transform: rotate(-13deg);
}

.brand-lens::after {
  position: absolute;
  inset: 12%;
  border: 1px solid rgba(41, 72, 214, 0.18);
  border-radius: 50%;
  content: "";
}

.lens-word {
  position: relative;
  z-index: 2;
  color: #253878;
  font-family: "Songti SC", serif;
  font-size: clamp(80px, 8vw, 125px);
  font-weight: 500;
}

.lens-axis {
  position: absolute;
  right: 15%;
  bottom: 20%;
  z-index: 2;
  color: rgba(35, 52, 99, 0.58);
  font-size: 8px;
  font-weight: 620;
  letter-spacing: 0.2em;
}

.hero-aside > p {
  margin: 34px 0;
  font-family: "Songti SC", serif;
  font-size: 18px;
  line-height: 1.75;
}

.hero-aside > a {
  min-width: 158px;
  padding: 11px 0;
  display: flex;
  justify-content: space-between;
  border-bottom: 1px solid var(--ink);
  font-size: 12px;
}

.hero-bottom {
  padding: 17px 0 0;
  display: flex;
  justify-content: space-between;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 10px;
  letter-spacing: 0.08em;
}

.hero-bottom p {
  margin: 0;
}

.hero-bottom div {
  min-width: 230px;
  display: flex;
  align-items: center;
  gap: 14px;
}

.hero-bottom i {
  height: 1px;
  flex: 1;
  background: var(--line);
}

.section {
  width: var(--page);
  margin: 0 auto;
  padding: 160px 0;
  display: grid;
  grid-template-columns: minmax(100px, 0.18fr) minmax(0, 1fr);
  border-top: 1px solid var(--line);
}

.section-index {
  align-self: start;
  color: var(--muted);
}

.section-index span {
  display: block;
  color: var(--blue);
  font-family: "Times New Roman", serif;
  font-size: 34px;
  line-height: 1;
}

.section-index p {
  margin: 14px 0 0;
  font-size: 10px;
  letter-spacing: 0.12em;
}

.section-lead {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 0.35fr;
  gap: 60px;
  align-items: end;
}

.section-lead h2,
.philosophy-title-row h2,
.about-content > h2 {
  margin: 0;
  font-family: "Songti SC", "STSong", serif;
  font-size: clamp(48px, 6.2vw, 92px);
  font-weight: 500;
  letter-spacing: -0.07em;
  line-height: 1.12;
}

.section-lead > p {
  margin: 0 0 10px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.95;
}

.definitions {
  margin-top: 118px;
}

.definition {
  min-height: 330px;
  padding: 48px 0;
  display: grid;
  grid-template-columns: 0.48fr 0.52fr;
  align-items: center;
  border-top: 1px solid var(--line);
}

.definition:last-child {
  border-bottom: 1px solid var(--line);
}

.definition-character {
  color: #252525;
  font-family: "Songti SC", "STSong", serif;
  font-size: clamp(128px, 15vw, 230px);
  font-weight: 500;
  line-height: 0.8;
}

.definition-sky .definition-character {
  color: var(--blue);
}

.definition-copy {
  max-width: 490px;
}

.definition-copy > span {
  color: var(--blue);
  font-size: 10px;
  font-weight: 650;
  letter-spacing: 0.18em;
}

.definition-copy h3 {
  margin: 25px 0 18px;
  font-family: "Songti SC", serif;
  font-size: clamp(30px, 3.4vw, 48px);
  font-weight: 500;
  letter-spacing: -0.04em;
}

.definition-copy p {
  max-width: 440px;
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 2;
}

.manifesto {
  min-height: 780px;
  padding: 62px max(5vw, calc((100vw - 1380px) / 2));
  display: grid;
  grid-template-rows: auto 1fr auto;
  background: var(--night);
  color: #f3f2ec;
}

.manifesto-topline {
  padding-bottom: 18px;
  display: grid;
  grid-template-columns: 80px 1fr auto;
  align-items: end;
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
  color: rgba(255, 255, 255, 0.55);
  font-size: 9px;
  letter-spacing: 0.16em;
}

.manifesto-topline p {
  margin: 0;
}

.manifesto-topline span {
  color: #85a1ff;
  font-family: "Times New Roman", serif;
  font-size: 32px;
  letter-spacing: 0;
}

.manifesto blockquote {
  margin: 0;
  align-self: center;
  font-family: "Songti SC", "STSong", serif;
  font-size: clamp(48px, 6.7vw, 105px);
  font-weight: 400;
  letter-spacing: -0.06em;
  line-height: 1.28;
}

.manifesto blockquote span {
  display: block;
}

.manifesto blockquote span:last-child {
  margin-left: 0.72em;
  color: #8da7ff;
}

.manifesto-foot {
  display: flex;
  align-items: end;
  justify-content: space-between;
}

.manifesto-foot p {
  margin: 0;
  color: rgba(255, 255, 255, 0.58);
  font-size: 14px;
  line-height: 1.9;
}

.manifesto-foot > span {
  color: #8da7ff;
  font-family: "Times New Roman", serif;
  font-size: 72px;
  line-height: 0.8;
}

.philosophy {
  background: var(--paper-light);
}

.philosophy-title-row {
  display: flex;
  align-items: end;
  justify-content: space-between;
}

.philosophy-title-row p,
.values-heading {
  color: var(--muted);
  font-size: 10px;
  letter-spacing: 0.14em;
}

.principles {
  margin-top: 114px;
  border-top: 1px solid var(--line);
}

.principles article {
  min-height: 275px;
  padding: 42px 0;
  display: grid;
  grid-template-columns: 0.2fr 0.52fr 0.28fr;
  gap: 28px;
  align-items: start;
  border-bottom: 1px solid var(--line);
}

.principles article > span {
  color: var(--blue);
  font-size: 11px;
  letter-spacing: 0.14em;
}

.principles h3 {
  margin: 0;
  font-family: "Songti SC", serif;
  font-size: clamp(34px, 4vw, 58px);
  font-weight: 500;
  letter-spacing: -0.05em;
  line-height: 1.22;
}

.principles p {
  margin: 7px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.9;
}

.values-heading {
  margin-top: 120px;
  padding-bottom: 16px;
  display: flex;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
}

.values-heading p {
  margin: 0;
  color: var(--ink);
}

.values-list article {
  min-height: 138px;
  display: grid;
  grid-template-columns: 0.2fr 0.32fr 0.48fr;
  align-items: center;
  border-bottom: 1px solid var(--line);
}

.values-list article > span {
  color: var(--muted);
  font-family: "Songti SC", serif;
  font-size: 14px;
}

.values-list h3 {
  margin: 0;
  font-family: "Songti SC", serif;
  font-size: clamp(32px, 3vw, 46px);
  font-weight: 500;
}

.values-list p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.about-content {
  display: grid;
  grid-template-columns: 0.53fr 0.47fr;
  gap: clamp(60px, 10vw, 160px);
}

.about-copy {
  padding-top: 11px;
}

.about-copy > p {
  max-width: 550px;
  margin: 0 0 22px;
  color: #55544f;
  font-size: 15px;
  line-height: 2.05;
}

.about-copy dl {
  margin: 70px 0 0;
  border-top: 1px solid var(--line);
}

.about-copy dl div {
  min-height: 70px;
  display: grid;
  grid-template-columns: 0.3fr 0.7fr;
  align-items: center;
  border-bottom: 1px solid var(--line);
}

.about-copy dt {
  color: var(--muted);
  font-size: 10px;
  letter-spacing: 0.12em;
}

.about-copy dd {
  margin: 0;
  font-size: 13px;
}

.closing {
  min-height: 660px;
  padding: 100px max(5vw, calc((100vw - 1380px) / 2));
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  background: var(--blue);
  color: #f7f6f1;
}

.closing > p {
  margin: 0 0 34px;
  color: rgba(255, 255, 255, 0.65);
  font-size: 11px;
  letter-spacing: 0.14em;
}

.closing h2 {
  margin: 0;
  font-family: "Songti SC", serif;
  font-size: clamp(58px, 9vw, 138px);
  font-weight: 400;
  letter-spacing: -0.075em;
  line-height: 1;
}

.closing a {
  width: 190px;
  margin-top: 88px;
  padding: 12px 0;
  display: flex;
  justify-content: space-between;
  border-bottom: 1px solid rgba(255, 255, 255, 0.68);
  font-size: 12px;
}

.site-footer {
  min-height: 138px;
  padding: 34px max(5vw, calc((100vw - 1380px) / 2));
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  background: #e7e5df;
}

.site-footer > p {
  margin: 0;
  color: var(--muted);
  font-size: 9px;
  letter-spacing: 0.12em;
}

.site-footer > p:last-child {
  justify-self: end;
}

@media (max-width: 1040px) {
  :root {
    --page: calc(100vw - 48px - var(--safe));
  }

  .hero-main {
    grid-template-columns: minmax(0, 1fr) 240px;
    gap: 28px;
  }

  .hero h1 {
    font-size: clamp(68px, 10vw, 106px);
  }

  .section-lead,
  .about-content {
    grid-template-columns: 1fr;
  }

  .section-lead > p {
    margin-top: 25px;
  }

  .principles article {
    grid-template-columns: 0.18fr 0.5fr 0.32fr;
  }
}

@media (max-width: 760px) {
  :root {
    --page: calc(100vw - 36px - var(--safe));
  }

  .site-header {
    top: 12px;
    min-height: 58px;
    grid-template-columns: 1fr auto;
  }

  /* 导航在移动端必须保留 —— 产品下拉挂在这里。
     改为收紧字号与间距，并让出「品牌宣言」那条链接的位置。 */
  .site-nav {
    gap: 20px;
  }

  .site-nav a,
  .nav-products > summary {
    padding: 14px 0;         /* 字号缩到 11.5px 后,13px 内边距只到 43px */
    font-size: 11.5px;
  }

  .header-link {
    display: none;
  }

  /* 触发器靠近右边缘，面板改为右对齐，避免出界 */
  .nav-products-panel {
    left: auto;
    right: -10px;
    min-width: 190px;
    transform: none;
  }

  .brand {
    font-size: 14px;
  }

  .brand small {
    font-size: 6.5px;
    letter-spacing: 0.16em;
  }

  .footer-brand img {
    width: 150px;
  }

  .hero {
    min-height: auto;
    padding: 102px 0 28px;
  }

  .hero-meta span:first-child {
    display: none;
  }

  .hero-meta {
    justify-content: flex-end;
  }

  .hero-main {
    padding: 68px 0 60px;
    grid-template-columns: 1fr;
  }

  .hero h1 {
    font-size: clamp(58px, 17vw, 88px);
    line-height: 1.02;
  }

  .hero-second-line {
    margin: 0.2em 0 0;
  }

  .hero-aside {
    padding: 10px 0 0;
    display: grid;
    grid-template-columns: 150px 1fr;
    gap: 26px;
    align-items: center;
  }

  .brand-lens {
    width: 150px;
    grid-row: 1 / 3;
  }

  .lens-word {
    font-size: 70px;
  }

  .hero-aside > p {
    margin: 0;
    font-size: 16px;
  }

  .hero-aside > a {
    min-width: 0;
    width: 100%;
  }

  .hero-bottom > div {
    display: none;
  }

  .section {
    padding: 100px 0;
    grid-template-columns: 1fr;
  }

  .section-index {
    margin-bottom: 60px;
    display: flex;
    align-items: baseline;
    gap: 18px;
  }

  .section-index p {
    margin: 0;
  }

  .section-lead h2,
  .philosophy-title-row h2,
  .about-content > h2 {
    font-size: clamp(44px, 13vw, 64px);
  }

  .definitions {
    margin-top: 78px;
  }

  .definition {
    min-height: auto;
    padding: 52px 0;
    grid-template-columns: 0.36fr 0.64fr;
    gap: 24px;
  }

  .definition-character {
    align-self: start;
    font-size: 28vw;
  }

  .definition-copy h3 {
    margin-top: 18px;
    font-size: 30px;
  }

  .manifesto {
    min-height: 650px;
    padding: 36px max(18px, env(safe-area-inset-right, 0px)) 36px
      max(18px, env(safe-area-inset-left, 0px));
  }

  .manifesto-topline {
    grid-template-columns: 52px 1fr;
  }

  .manifesto-topline p:last-child {
    display: none;
  }

  .manifesto blockquote {
    font-size: clamp(40px, 12vw, 58px);
    line-height: 1.38;
  }

  .manifesto blockquote span:last-child {
    margin-left: 0;
  }

  .manifesto-foot > span {
    display: none;
  }

  .philosophy-title-row {
    display: block;
  }

  .philosophy-title-row p {
    margin-top: 24px;
  }

  .principles {
    margin-top: 72px;
  }

  .principles article {
    min-height: auto;
    padding: 38px 0;
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .principles h3 {
    font-size: 38px;
  }

  .values-heading {
    margin-top: 80px;
  }

  .values-list article {
    min-height: 120px;
    grid-template-columns: 50px 0.35fr 0.65fr;
    gap: 12px;
  }

  .values-list h3 {
    font-size: 30px;
  }

  .values-list p {
    line-height: 1.7;
  }

  .about-content {
    gap: 52px;
  }

  .about-copy dl {
    margin-top: 50px;
  }

  .closing {
    min-height: 580px;
    padding: 80px max(18px, env(safe-area-inset-right, 0px)) 80px
      max(18px, env(safe-area-inset-left, 0px));
  }

  .closing h2 {
    font-size: clamp(54px, 17vw, 82px);
    line-height: 1.08;
  }

  .site-footer {
    padding: 40px max(18px, env(safe-area-inset-right, 0px)) 40px
      max(18px, env(safe-area-inset-left, 0px));
    grid-template-columns: 1fr;
    gap: 25px;
  }

  .site-footer > p:last-child {
    justify-self: start;
  }
}

@media (max-width: 430px) {
  .hero-aside {
    grid-template-columns: 125px 1fr;
    gap: 20px;
  }

  .brand-lens {
    width: 125px;
  }

  .lens-axis {
    display: none;
  }

  .values-list article {
    grid-template-columns: 38px 0.32fr 0.68fr;
  }
}

/* ── 横屏手机 / 矮视口 ──────────────────────────────────────────────
   高度不足时,100svh 的首屏会把大字标题挤成一条,改为按内容高度排。 */
@media (orientation: landscape) and (max-height: 540px) {
  .hero {
    min-height: auto;
    padding: 92px 0 40px;
  }

  .hero h1 {
    font-size: clamp(38px, 7.4vw, 62px);
  }

  .hero-main {
    padding: 38px 0 34px;
  }

  .hero-aside {
    padding: 0;
  }

  .section {
    padding: 76px 0;
  }

  .manifesto,
  .closing {
    min-height: auto;
    padding-top: 76px;
    padding-bottom: 76px;
  }

  .manifesto blockquote {
    font-size: clamp(30px, 6vw, 46px);
  }

  .closing h2 {
    font-size: clamp(38px, 8vw, 62px);
  }
}

/* ── 超窄屏（iPhone SE / 360dp 安卓机）──────────────────────────────
   页头要同时放下字标和四项导航,再收一档。 */
@media (max-width: 360px) {
  .site-nav {
    gap: 13px;
  }

  .site-nav a,
  .nav-products > summary {
    font-size: 11px;
  }

  .nav-products > summary {
    gap: 5px;
  }

  .brand {
    font-size: 13px;
  }

  .brand small {
    font-size: 6px;
    letter-spacing: 0.1em;
  }

  .nav-products-panel {
    min-width: 172px;
  }

  .footer-brand img {
    width: 132px;
  }
}

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

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}