:root {
  --paper: #f4f4f2;
  --paper-2: #e9e9e6;
  --white: #ffffff;
  --ink: #1d1d1f;
  --muted: #626268;
  --stage: #0d0d0f;
  --silver: #f2f2f4;
  --silver-2: #b9b9c0;
  --accent: #007aff;
  --radius: 20px;
  --pad: clamp(20px, 4vw, 64px);
  --font-display:
    "Songti SC", "STSong", "Noto Serif CJK SC", "Source Han Serif SC", serif;
  --font-text:
    -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", sans-serif;
}

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

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-text);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a {
  color: inherit;
}

button {
  font: inherit;
  color: inherit;
}

::selection {
  background: var(--ink);
  color: var(--paper);
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.skip {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 50;
  padding: 10px 16px;
  border-radius: 999px;
  background: var(--ink);
  color: var(--white);
  text-decoration: none;
  transform: translateY(-200%);
  transition: transform 0.2s ease;
}

.skip:focus {
  transform: none;
}

/* The split stage */
.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  max-width: 1600px;
  margin: 0 auto;
  padding: 12px;
}

.reading {
  min-width: 0;
}

.stage {
  position: sticky;
  top: 12px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: calc(100svh - 24px);
  color: var(--ink);
  align-self: start;
  padding: 12px 16px;
}

/* iPhone 13 外壳：屏幕 390x844 逻辑像素 + 10px 黑内框 + 3px 金属边 */
.device {
  /* 130px = 舞台上下内边距 24 + 说明区 80 + 设备内框 26，保证最长说明下手机不被压扁 */
  --screen-h: min(844px, calc(100svh - 24px - 130px));
  /* 外壳几何随整机等比缩放：--device-h 等于设计高度 870 时即 1:1。
     固定 px 会让窄屏（宽 150–230px）的圆角占宽 39%、内框吃掉 17%，
     手机框读成胶囊、屏幕被挤成 1:2.32 而出现黑边。
     （CSS 里长度不能除以长度，所以用 --device-h × 比例，而不是一个无单位系数） */
  --device-h: calc(var(--screen-h) + 26px);
  position: relative;
  flex: 0 1 auto;
  min-height: 0;
  height: var(--device-h);
  aspect-ratio: 416 / 870;
  /* 金属边有下限：缩到 150px 宽时 1.08px 会渲染成亚像素，边框退化成纯黑一圈 */
  padding: max(1.5px, calc(var(--device-h) * 3 / 870));
  border-radius: calc(var(--device-h) * 58 / 870);
  background: #b4b4ba;
  box-shadow: /* taste-skill-ignore: 金属边高光与设备落地阴影，设备框例外已登记 */
    0 24px 44px -28px rgba(0, 0, 0, 0.28),
    inset 0 calc(var(--device-h) / 870) 0 rgba(255, 255, 255, 0.72),
    inset 0 calc(var(--device-h) / -870) 0 rgba(0, 0, 0, 0.32),
    inset calc(var(--device-h) / 870) 0 0 rgba(255, 255, 255, 0.4),
    inset calc(var(--device-h) / -870) 0 0 rgba(0, 0, 0, 0.22);
  --metal: #d2d2d7;
}

/* 左侧静音 + 音量上下，右侧电源 */
.device::before,
.device::after {
  content: "";
  position: absolute;
  width: calc(var(--device-h) * 3 / 870);
}

.device::before {
  left: calc(var(--device-h) * -2 / 870);
  top: 12%;
  height: 36%;
  border-radius: calc(var(--device-h) * 2 / 870) 0 0 calc(var(--device-h) * 2 / 870);
  background:
    var(--metal) 50% 0 / 100% 12% no-repeat,
    var(--metal) 50% 26% / 100% 26% no-repeat,
    var(--metal) 50% 60% / 100% 26% no-repeat;
}

.device::after {
  right: calc(var(--device-h) * -2 / 870);
  top: 24%;
  height: 9%;
  border-radius: 0 calc(var(--device-h) * 2 / 870) calc(var(--device-h) * 2 / 870) 0;
  background: var(--metal);
}

.device-body {
  height: 100%;
  padding: calc(var(--device-h) * 10 / 870);
  border-radius: calc(var(--device-h) * 55 / 870);
  background: #050506;
  box-shadow: 0 0 0 calc(var(--device-h) * 1 / 870) #1c1c20 inset; /* taste-skill-ignore: 内框高光 */
}

.stage-shot {
  position: relative;
  height: 100%;
  margin: 0;
  overflow: hidden;
  border-radius: calc(var(--device-h) * 47 / 870);
  background: #000;
}

.shot {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
  opacity: 0;
  transition: opacity 0.55s ease;
}

.shot.is-active {
  opacity: 1;
}

.stage-foot {
  display: flex;
  flex: 0 0 auto;
  flex-direction: column;
  gap: 2px;
  padding: 14px 22px 18px;
  text-align: center;
}

.stage-foot strong {
  color: var(--ink);
  font-size: 16px;
  font-weight: 600;
}

.stage-foot span {
  color: var(--muted);
  font-size: 13px;
}

/* Hero */
.hero {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: calc(100svh - 24px);
  padding: clamp(32px, 5vh, 56px) var(--pad);
}

.hero-top {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 24px;
}

.page-nav {
  display: flex;
  flex: 0 0 auto;
  align-items: center;
  gap: clamp(16px, 2vw, 24px);
  margin-left: auto;
}

.page-nav a {
  color: var(--muted);
  font-size: 13px;
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.2s ease;
}

.page-nav a:hover {
  color: var(--ink);
}

.lockup {
  width: clamp(180px, 18vw, 260px);
  height: auto;
}

.hero-body {
  width: 100%;
  max-width: 40rem;
  margin: 0 auto;
  text-align: center;
}

h1,
h2,
h3,
p {
  text-wrap: pretty;
}

h1 {
  margin: 0 0 24px;
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 4.2vw, 4.1rem);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.lead {
  max-width: 34rem;
  margin: 0 auto 32px;
  color: var(--ink);
  font-size: 19px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: clamp(20px, 3vw, 40px);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 52px;
  padding: 0 26px;
  border: 0;
  border-radius: 999px;
  background: var(--ink);
  color: var(--white);
  font-size: 16px;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition:
    transform 0.2s ease,
    background 0.2s ease;
}

.button:hover {
  background: #000;
}

.button:active {
  transform: scale(0.98);
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--muted);
  font-size: 16px;
  text-decoration: none;
  text-underline-offset: 3px;
}

.text-link:hover,
.text-link:focus-visible {
  color: var(--ink);
  text-decoration: underline;
}

.search-pill {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-height: 52px;
  padding: 0 8px 0 20px;
  border: 1px solid #86868b; /* taste-skill-ignore: 胶囊是控件不是盒子；边界对纸面 3.2:1，满足 WCAG 1.4.11 */
  border-radius: 999px;
  background: var(--white);
}

.search-group {
  display: flex;
  flex-direction: column;
  line-height: 1.3;
}

.search-label {
  color: var(--muted);
  font-size: 13px;
}

.search-group strong {
  font-size: 16px;
  font-weight: 600;
}

.search-copy {
  min-height: 40px;
  padding: 0 16px;
  border: 0;
  border-radius: 999px;
  background: var(--paper-2);
  color: var(--ink);
  font-size: 13px;
  white-space: nowrap;
  cursor: pointer;
  transition: background 0.2s ease;
}

.search-copy:hover {
  background: #dededa;
}

.qr-inline {
  display: flex;
  align-items: center;
  gap: 14px;
  margin: 0;
  padding: 0;
  border: 0;
  background: transparent;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
}

.qr-inline img {
  width: 152px;
  height: 152px;
  padding: 6px;
  border-radius: var(--radius);
  background: var(--white);
}

.qr-cap {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.qr-cap strong {
  font-size: 16px;
  font-weight: 600;
}

.qr-cap span {
  color: var(--muted);
  font-size: 13px;
}

.only-mobile {
  display: none;
}

@media (max-width: 820px) {
  .only-desktop {
    display: none;
  }

  .only-mobile {
    display: inline;
  }
}

.facts {
  margin: 28px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.scroll-note {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  text-align: center;
}

/* The reading column sits inside a 12px split gutter; subtract it so its text edge
   lines up with the full-width sections below. */
@media (min-width: 821px) {
  .reading {
    --pad: calc(clamp(20px, 4vw, 64px) - 12px);
  }
}

/* Sections */
.section {
  padding: clamp(80px, 12vh, 140px) var(--pad);
}

.section-head {
  max-width: 42rem;
  margin: 0 auto 56px;
}

h2 {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-size: clamp(2rem, 3vw, 3rem);
  font-weight: 400;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.section-head p {
  max-width: 34em;
  margin: 0;
  color: var(--ink);
}

.tool-groups {
  display: flex;
  flex-direction: column;
  gap: 56px;
  max-width: 42rem;
  margin: 0 auto;
}

.tool-group h3 {
  margin: 0 0 8px;
  font-size: 19px;
  font-weight: 600;
}

.tool-group p {
  max-width: 34em;
  margin: 0 0 18px;
  color: var(--ink);
  font-size: 16px;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.chip {
  min-height: 44px;
  padding: 0 18px;
  border: 1px solid #86868b; /* taste-skill-ignore: chip 是控件不是盒子；边界对纸面 3.2:1，满足 WCAG 1.4.11 */
  border-radius: 999px;
  background: var(--white);
  color: var(--ink);
  font-size: 16px;
  cursor: pointer;
  transition:
    background 0.2s ease,
    color 0.2s ease,
    border-color 0.2s ease,
    transform 0.2s ease;
}

.chip:hover {
  border-color: var(--ink);
  transform: translateY(-1px);
}

.chip:active {
  transform: scale(0.98);
}

.chip[aria-pressed="true"] {
  background: var(--ink);
  color: var(--white);
  border-color: var(--ink);
}

.tool-index {
  max-width: 42rem;
  margin: 88px auto 0;
}

.tool-index h3 {
  margin: 0 0 18px;
  font-size: 19px;
  font-weight: 600;
}

.tool-index dl {
  display: grid;
  gap: 14px;
  margin: 0;
}

.tool-index dl > div {
  display: grid;
  grid-template-columns: 6.5rem minmax(0, 1fr);
  gap: 12px;
}

.tool-index dt {
  color: var(--muted);
  font-size: 13px;
}

.tool-index dd {
  margin: 0;
  font-size: 16px;
  line-height: 1.7;
}

.tool-link {
  padding: 0;
  border: 0;
  background: none;
  color: inherit;
  font: inherit;
  cursor: pointer;
  text-decoration: underline;
  text-decoration-color: rgba(29, 29, 31, 0.32);
  text-underline-offset: 3px;
  transition: text-decoration-color 0.2s ease;
}

.tool-link:hover,
.tool-link:focus-visible {
  text-decoration-color: currentColor;
}

.tool-index-note {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 13px;
}

/* Mobile preview inside the tool section */
.mobile-stage {
  display: none;
}

/* Why panel */
.panel-dark {
  max-width: 42rem;
  margin: 0 auto;
  padding: clamp(28px, 4vw, 56px);
  border-radius: var(--radius);
  background: var(--stage);
  color: var(--silver);
}

.panel-dark h2 {
  color: var(--silver);
  font-size: clamp(1.75rem, 2.4vw, 2.25rem);
}

.panel-dark .statement {
  margin: 0 0 20px;
  color: var(--silver);
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 400;
  line-height: 1.3;
}

.panel-dark > p {
  max-width: 34em;
  color: var(--silver-2);
  font-size: 16px;
}

.principles {
  display: flex;
  flex-direction: column;
  gap: 24px;
  margin: 32px 0 0;
  padding: 0;
  list-style: none;
}

.principles li {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding-left: 20px;
}

.principles li::before {
  content: "";
  position: absolute;
  top: 0.6em;
  left: 0;
  width: 8px;
  height: 8px;
  background: var(--silver);
}

.principles strong {
  font-weight: 600;
}

.principles span {
  color: var(--silver-2);
  font-size: 16px;
}

/* How it works */
.steps {
  display: flex;
  flex-direction: column;
  gap: 28px;
  max-width: 42rem;
  margin: 0 auto;
  padding: 0;
  list-style: none;
}

.steps li {
  position: relative;
  padding-left: 28px;
}

.steps li::before {
  content: "";
  position: absolute;
  top: 0.6em;
  left: 0;
  width: 10px;
  height: 10px;
  background: var(--ink);
}

.steps h3 {
  margin: 0 0 6px;
  font-size: 19px;
  font-weight: 600;
}

.steps p {
  max-width: 34em;
  margin: 0;
  color: var(--ink);
  font-size: 16px;
}

/* FAQ */
.faq {
  max-width: 42rem;
  margin: 0 auto;
}

.faq p {
  max-width: 34em;
  margin: 0 0 20px;
  color: var(--ink);
  font-size: 16px;
  line-height: 1.65;
}

.faq strong {
  font-weight: 600;
}

/* Real screens band */
.strip {
  padding: clamp(80px, 12vh, 140px) var(--pad);
}

.strip-head {
  max-width: 1325px;
  margin: 0 auto 48px;
}

.strip-head p {
  max-width: 34em;
  margin: 0;
  color: var(--ink);
}

.strip-track {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(16px, 2.4vw, 32px);
  max-width: 1325px;
  margin: 0 auto;
}

.strip figure {
  margin: 0;
}

.strip img {
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  background: var(--white);
}

.strip figcaption {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin-top: 12px;
}

.strip figcaption strong {
  font-size: 16px;
  font-weight: 600;
}

.strip figcaption span {
  color: var(--muted);
  font-size: 13px;
}

/* Closing call */
.cta {
  padding: clamp(72px, 12vh, 140px) var(--pad);
  background: var(--stage);
  color: var(--silver);
}

.cta-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.9fr);
  gap: clamp(40px, 8vw, 120px);
  align-items: center;
  max-width: 1325px;
  margin: 0 auto;
}

.cta h2 {
  margin: 0 0 24px;
  color: var(--silver);
  font-size: clamp(3.2rem, 6vw, 6rem);
  line-height: 0.95;
}

.cta-copy > p {
  max-width: 30rem;
  margin: 0 0 32px;
  color: var(--silver-2);
  font-size: 19px;
  line-height: 1.7;
}

.button-light {
  background: var(--silver);
  color: var(--ink);
}

.button-light:hover {
  background: var(--white);
}

.copy-status {
  position: absolute;
  width: 1px;
  height: 1px; /* taste-skill-ignore: 读屏专用状态区，视觉反馈由按钮文案承担 */
  margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.cta-qr {
  display: flex;
  flex-direction: column;
  justify-self: end;
  width: 100%;
  max-width: 340px;
  margin: 0;
  padding: clamp(20px, 2.4vw, 32px);
  border: 0;
  border-radius: var(--radius);
  background: var(--white);
  color: var(--ink);
  font: inherit;
  text-align: center;
  cursor: pointer;
}

.cta-qr img {
  width: 100%;
  height: auto;
}

.cta-qr-cap {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-top: 16px;
}

.cta-qr-cap strong {
  font-size: 16px;
  font-weight: 600;
}

.cta-qr-cap span {
  color: var(--muted);
  font-size: 13px;
}

/* Mini program modal */
.mini-modal {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: grid;
  place-items: center;
  padding: 24px;
}

.mini-modal[hidden] {
  display: none;
}

.mini-modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(13, 13, 15, 0.72);
}

.mini-modal-card {
  position: relative;
  width: 100%;
  max-width: 380px;
  padding: clamp(24px, 5vw, 36px);
  border-radius: 24px;
  background: var(--paper);
  color: var(--ink);
  text-align: center;
  box-shadow: 0 24px 60px -20px rgba(0, 0, 0, 0.55); /* taste-skill-ignore: 真弹层例外 */
}

.mini-modal-card:focus,
.mini-modal-card:focus-visible {
  outline: none; /* 对话框容器接收初始焦点，不画焦点环 */
}

.mini-modal-card h2 {
  margin: 0 0 8px;
  font-size: 24px;
}

.mini-modal-lead {
  margin: 0 0 20px;
  color: var(--muted);
  font-size: 14px;
}

.mini-modal-qr {
  width: 200px;
  height: 200px;
  margin: 0 auto 20px;
  border-radius: 12px;
  background: var(--white);
}

.mini-modal-actions {
  display: flex;
  justify-content: center;
  gap: 12px;
}

.mini-modal-actions .button {
  flex: 1 1 0;
  min-height: 48px;
  padding: 0 18px;
  font-size: 15px;
}

.button-ghost {
  background: var(--paper-2);
  color: var(--ink);
}

.button-ghost:hover {
  background: #dededa;
}

.button.is-error {
  background: #b3261e;
  color: var(--white);
}

.mini-modal-status {
  min-height: 20px;
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 13px;
}

@media (max-width: 820px) {
  .mini-modal-actions {
    flex-direction: column;
  }
}

/* Footer */
.footer {
  padding: 48px var(--pad);
  background: var(--paper-2);
}

.footer-inner {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 32px;
  max-width: 1325px;
  margin: 0 auto;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.footer-brand img {
  width: 40px;
  height: 40px;
}

.footer-brand div {
  display: flex;
  flex-direction: column;
}

.footer-brand strong {
  font-size: 16px;
  font-weight: 600;
}

.footer-brand span {
  color: var(--muted);
  font-size: 13px;
}

.footer-meta {
  color: var(--muted);
  font-size: 13px;
  text-align: right;
}

.footer-meta p {
  margin: 0 0 6px;
}

.footer-meta .icp {
  text-decoration: underline;
  text-underline-offset: 2px;
}

.footer-meta a {
  text-decoration: none;
}

.footer-meta a:hover {
  text-decoration: underline;
}

/* Motion */
.js-reveal [data-reveal] {
  opacity: 0;
  transform: translateY(20px);
  transition:
    opacity 0.7s cubic-bezier(0.2, 0.7, 0.2, 1),
    transform 0.7s cubic-bezier(0.2, 0.7, 0.2, 1);
  transition-delay: var(--d, 0ms);
}

.js-reveal [data-reveal].is-in {
  opacity: 1;
  transform: none;
}

.js-reveal .hero-body > * {
  animation: rise 0.8s cubic-bezier(0.2, 0.7, 0.2, 1) both;
}

.js-reveal .hero-body > *:nth-child(1) {
  animation-delay: 0.05s;
}
.js-reveal .hero-body > *:nth-child(2) {
  animation-delay: 0.13s;
}
.js-reveal .hero-body > *:nth-child(3) {
  animation-delay: 0.21s;
}
.js-reveal .hero-body > *:nth-child(4) {
  animation-delay: 0.29s;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* Tablet and phone */
@media (max-width: 820px) {
  .split {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0;
  }

  .stage {
    order: -1;
    position: static;
    width: min(calc(100% - 24px), 420px);
    height: auto;
    margin: 12px auto 0;
    padding: 12px 16px 0;
    z-index: 0;
  }

  .device {
    /* 手机预览整屏可见：高度受视口约束，比例由外壳自身维持。
       100svh - 380px = 给说明区 108 + 品牌/导航/标题 240 留出的上屏预算，短屏先让手机变小而不是把标题挤出首屏 */
    --screen-h: min(460px, calc(52svh - 26px), calc(100svh - 380px));
  }

  /* 缩到 200px 宽时，3px 的侧键读起来像贴在纸上的杂点 */
  .device::before,
  .device::after {
    display: none;
  }

  .stage-shot {
    margin: 0;
  }

  .reading {
    position: relative;
    z-index: 1;
    width: 100%;
    margin-top: -24px;
    border-radius: 24px 24px 0 0;
    background: var(--paper);
  }

  .hero {
    min-height: auto;
    padding: 40px var(--pad) 48px;
  }

  .lockup {
    width: clamp(160px, 44vw, 210px);
  }

  h1 {
    font-size: clamp(2rem, 9vw, 2.7rem);
  }

  .lead {
    margin-bottom: 28px;
  }

  .hero-top {
    flex-wrap: wrap;
    justify-content: center;
    gap: 16px;
  }

  .page-nav {
    flex-wrap: wrap;
    justify-content: center;
    width: 100%;
    margin-left: 0;
  }

  .hero-actions {
    flex-direction: column;
    gap: 24px;
  }

  .button {
    width: 100%;
    max-width: 320px;
  }

  .qr-inline {
    justify-content: center;
  }

  .facts {
    text-align: center;
  }

  .scroll-note {
    display: none;
  }

  .section {
    padding: 72px var(--pad);
  }

  .section-head {
    margin-bottom: 40px;
  }

  .tool-groups {
    gap: 40px;
  }

  .mobile-stage {
    display: flex;
    align-items: center;
    gap: 16px;
    position: sticky;
    top: 0;
    z-index: 4;
    width: 100%;
    max-width: 360px;
    height: 40svh;
    margin: 0 auto 28px;
    padding: 12px;
    background: var(--paper); /* 吸顶时遮住从其下方滚过的工具列表 */
  }

  .mobile-stage .device {
    --screen-h: calc(40svh - 50px);
    flex: 0 0 auto;
  }

  .mobile-stage .stage-shot {
    margin: 0;
  }

  /* 移动端整屏可见：外壳比例与实际屏幕略有出入，用 contain 保证不裁画面 */
  .stage .shot,
  .mobile-stage .shot {
    object-fit: contain;
  }

  .mobile-stage-foot {
    display: flex;
    flex-direction: column;
    gap: 2px;
    padding: 0;
  }

  .mobile-stage-foot strong {
    color: var(--ink);
    font-size: 16px;
    font-weight: 600;
  }

  .mobile-stage-foot span {
    color: var(--muted);
    font-size: 13px;
  }

  .panel-dark {
    padding: 28px 24px;
  }

  .strip-track {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

  .strip-head {
    margin-bottom: 32px;
  }

  .tool-index dl > div {
    grid-template-columns: 1fr;
    gap: 2px;
  }

  .cta-inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .cta h2 {
    font-size: clamp(2.1rem, 11vw, 3.2rem);
    line-height: 1.02;
  }

  .cta-qr {
    justify-self: start;
    max-width: 300px;
  }

  .footer-inner {
    flex-direction: column;
  }

  .footer-meta {
    text-align: left;
  }
}

@media (max-width: 820px) {
  .stage-foot {
    padding-bottom: 46px;
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

  .js-reveal [data-reveal] {
    opacity: 1;
    transform: none;
  }
}