/* 第五轮：导航、下载入口、文字层级与板块留白 */

/* 顶部导航：移除右侧 CTA 后保持居中，并加强半透明玻璃效果 */
.site-header {
  background: rgba(255, 253, 249, .68);
  border-color: rgba(255, 255, 255, .72);
  box-shadow: 0 12px 38px rgba(60, 47, 65, .055);
  -webkit-backdrop-filter: blur(22px) saturate(150%);
  backdrop-filter: blur(22px) saturate(150%);
}

.site-header.scrolled {
  background: rgba(255, 253, 249, .82);
}

/* 顶部图片 Logo：保持原品牌区域高度，不改变 Header 比例 */
.site-header .brand {
  gap: 0;
  line-height: 0;
}

.site-header .brand .header-logo {
  width: auto;
  height: 25px;
  max-width: min(171px, 46vw);
  object-fit: contain;
  object-position: left center;
}

/* 首屏三按钮 */
.hero-actions {
  flex-wrap: wrap;
  align-items: stretch;
}

.hero-actions .app-button,
.hero-actions .text-button {
  min-height: 62px;
}

.hero-actions .app-button {
  padding-inline: 21px;
  font-size: 13px;
}

.hero-actions .app-button small {
  margin-bottom: 2px;
}

.android-button:hover {
  box-shadow: 0 16px 30px rgba(44, 72, 55, .2);
}

/* 03 / OUR PROMISE：与首屏、02 板块统一正文层级 */
.promise-sticky > p:last-child {
  max-width: 590px;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.55;
  letter-spacing: -.012em;
}

.promise-card > span {
  color: var(--purple-strong);
}

.promise-card p {
  max-width: 700px;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.55;
  letter-spacing: 0;
}

/* 标题尺度对齐 02 / FIRST PRINCIPLE，并收紧三个承诺项 */
.promise-cards {
  gap: 12px;
}

.promise-card {
  min-height: 238px;
  padding: 30px 36px;
}

.promise-card h3 {
  margin: 34px 0 12px;
  font-size: 30px;
  line-height: 1.18;
  font-weight: 650;
  letter-spacing: -.035em;
}

/* 04 / QINOKID SYSTEM：闭环说明与首屏正文统一 */
.data-loop b,
.data-loop .loop-copy {
  color: var(--muted);
  font-size: 18px;
  line-height: 1.55;
  letter-spacing: -.012em;
}

.data-loop b {
  font-weight: 650;
}

.loop-copy {
  flex-basis: 430px;
  max-width: 620px;
}

/* 02—05 板块采用更紧凑的上下留白 */
.principle,
.promise,
.system {
  padding-top: 110px;
  padding-bottom: 110px;
}

.app-story {
  padding-top: 110px;
}

/* 页面末尾购买按钮 */
.purchase-button {
  width: max-content !important;
  min-width: 188px;
  justify-content: space-between;
  background: #e5484d;
}

.purchase-button:hover {
  box-shadow: 0 16px 34px rgba(201, 44, 51, .24);
}

@media (max-width: 1020px) {
  .site-header {
    grid-template-columns: 1fr auto;
  }
}

@media (max-width: 700px) {
  .hero-actions .app-button,
  .hero-actions .text-button {
    width: 100%;
  }

  .principle,
  .promise,
  .system {
    padding-top: 78px;
    padding-bottom: 88px;
  }

  .app-story {
    padding-top: 78px;
  }

  .promise-sticky > p:last-child,
  .data-loop b,
  .data-loop .loop-copy {
    font-size: 16px;
  }
}

/* 04 / QINOKID SYSTEM：核心放大、涟漪线宽与淡蓝/淡黄氛围 */
.system-canvas {
  isolation: isolate;
  background-color: #f0e8f7;
  background-image:
    linear-gradient(rgba(240, 232, 247, .95), rgba(240, 232, 247, .95)),
    url("../assets/images/homebg.png");
  background-position: center;
  background-size: cover;
  background-repeat: no-repeat;
}

.system-canvas::before,
.system-canvas::after {
  position: absolute;
  z-index: 0;
  inset: -18%;
  content: "";
  pointer-events: none;
  will-change: transform, opacity;
}

.system-canvas::before {
  background:
    radial-gradient(circle at 24% 34%, rgba(205, 230, 247, .58), transparent 38%),
    radial-gradient(circle at 78% 67%, rgba(255, 239, 179, .46), transparent 36%);
  animation: qino-ambient-drift-a 13s ease-in-out infinite alternate;
}

.system-canvas::after {
  background:
    radial-gradient(circle at 72% 25%, rgba(214, 232, 250, .34), transparent 32%),
    radial-gradient(circle at 32% 78%, rgba(255, 232, 166, .3), transparent 34%);
  animation: qino-ambient-drift-b 16s ease-in-out infinite alternate;
}

.system-rings {
  position: absolute;
  z-index: 1;
  inset: 0;
  pointer-events: none;
}

/* 220px → 250px */
.system-core[data-qino-orb] {
  width: 250px;
  height: 250px;
}

.system-rings i {
  --qino-ripple-stroke: 3px;
  animation-name: qino-ring-ripple-strong;
}

@keyframes qino-ring-ripple-strong {
  0% {
    opacity: 0;
    border-width: 1px;
    transform: translate(-50%, -50%) scale(.9);
  }
  24% {
    opacity: .72;
    border-width: var(--qino-ripple-stroke);
  }
  62% {
    opacity: .38;
    border-width: 2px;
  }
  100% {
    opacity: 0;
    border-width: 1px;
    transform: translate(-50%, -50%) scale(1.1);
  }
}

@keyframes qino-ambient-drift-a {
  from { opacity: .68; transform: translate3d(-1.5%, -1%, 0) scale(1); }
  to { opacity: .92; transform: translate3d(2%, 1.5%, 0) scale(1.04); }
}

@keyframes qino-ambient-drift-b {
  from { opacity: .5; transform: translate3d(2%, -1%, 0) scale(1.03); }
  to { opacity: .78; transform: translate3d(-1.5%, 2%, 0) scale(.99); }
}

@media (min-width: 701px) and (max-width: 1020px) {
  .system-core[data-qino-orb] {
    width: clamp(285px, 31vw, 330px);
    height: clamp(285px, 31vw, 330px);
  }
}

@media (max-width: 700px) {
  /* 180px → 270px：移动端同样放大 50% */
  .system-core[data-qino-orb] {
    width: min(270px, 72vw);
    height: min(270px, 72vw);
  }

  .system-rings i {
    --qino-ripple-stroke: 2.5px;
  }

  .system-canvas::before,
  .system-canvas::after {
    inset: -10%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .system-canvas::before,
  .system-canvas::after {
    animation: none;
  }
}

/* 04 / QINOKID SYSTEM：轻量流体 QinoAI 核心 */
.system-core[data-qino-orb] {
  isolation: isolate;
  overflow: visible;
  background: transparent;
  box-shadow: none;
  transition: transform .7s cubic-bezier(.22, 1, .36, 1), filter .7s ease;
}

.qino-orb-canvas {
  position: absolute;
  z-index: -1;
  inset: -18%;
  width: 136%;
  height: 136%;
  max-width: none;
  pointer-events: none;
  filter: drop-shadow(0 20px 30px rgba(113, 75, 150, .16));
}

.system-core-content {
  position: relative;
  z-index: 1;
  display: flex;
  width: 100%;
  height: 100%;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: radial-gradient(circle at 40% 30%, #fff, #c6a9e8 52%, #8562ab);
  text-align: center;
}

.system-core.orb-ready .system-core-content {
  background: rgba(255, 255, 255, .07);
}

.system-core[data-qino-orb]:hover {
  filter: saturate(1.035);
}

.system-rings i {
  border-color: rgba(154, 120, 191, .22);
  animation: qino-ring-ripple 6.8s cubic-bezier(.2, .6, .35, 1) infinite;
  will-change: transform, opacity;
}

.system-rings i:nth-child(2) {
  animation-delay: -2.25s;
}

.system-rings i:nth-child(3) {
  animation-delay: -4.5s;
}

@keyframes qino-ring-ripple {
  0% { opacity: 0; transform: translate(-50%, -50%) scale(.9); }
  18% { opacity: .72; }
  72% { opacity: .2; }
  100% { opacity: 0; transform: translate(-50%, -50%) scale(1.1); }
}

@media (max-width: 700px) {
  .qino-orb-canvas {
    inset: -12%;
    width: 124%;
    height: 124%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .system-rings i {
    animation: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .site-header,
  .hero-actions .app-button,
  .hero-actions .text-button {
    transition: none !important;
  }
}

/* 第六轮：跨尺寸排版与影片交互优化 */
.hero h1,
.film-intro h2,
.editorial-heading h2,
.promise-sticky h2,
.system-heading h2,
.app-story-title h2,
.feature-step h3,
.download-copy h2,
.footer-brand h2 {
  text-wrap: balance;
}

.editorial-heading,
.system-heading,
.app-story-title {
  width: 100%;
  max-width: none;
}

.editorial-heading h2,
.system-heading h2,
.app-story-title h2 {
  width: min(100%, 1320px);
  max-width: none;
}

.editorial-heading h2 span {
  display: inline-block;
  white-space: nowrap;
}

.app-story-title {
  padding-inline: clamp(42px, 4vw, 72px);
}

.app-story-title h2 {
  width: max-content;
  max-width: 100%;
  white-space: nowrap;
}

.principle-item h3,
.promise-card h3,
.system-node h3 {
  text-wrap: pretty;
}

.film-screen {
  scale: 1;
  transform: translateZ(0) scale(1);
  transform-origin: center;
  will-change: transform, box-shadow;
  transition:
    transform .8s cubic-bezier(.22, .61, .36, 1),
    box-shadow .8s cubic-bezier(.22, .61, .36, 1);
}

.film-screen:hover {
  scale: 1;
  transform: translateZ(0) scale(1.004);
  box-shadow: 0 50px 108px rgba(0, 0, 0, .28);
}

.film-screen::after {
  transition: opacity .7s ease;
}

/* 05 / QinoAI APP：宝宝状态与成长瞬间新视觉 */
.phone-view[data-view="safety"],
.phone-view[data-view="moments"] {
  inset-inline: 12px;
}

.care-card {
  height: 100%;
  padding: 12px 12px 20px;
  border-radius: 28px;
  background: #ead8ff;
  color: var(--ink);
}

.care-image {
  position: relative;
  height: calc(100% - 92px);
  min-height: 315px;
  overflow: hidden;
  border-radius: 23px;
  background: #efe9df;
}

.care-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.care-image > span {
  position: absolute;
  top: 12px;
  left: 50%;
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 8px 15px;
  transform: translateX(-50%);
  border-radius: 999px;
  background: rgba(255, 255, 255, .82);
  box-shadow: 0 7px 22px rgba(37, 31, 40, .1);
  color: var(--ink);
  font-size: 14px;
  font-weight: 700;
  white-space: nowrap;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.care-image > span i {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: #42eb7c;
  box-shadow: 0 0 0 3px rgba(66, 235, 124, .16);
}

.care-card > p {
  margin: 17px 8px 0;
}

.care-card > p b,
.care-card > p small {
  display: block;
}

.care-card > p b {
  font-size: 20px;
  line-height: 1.25;
  letter-spacing: -.025em;
}

.care-card > p small {
  margin-top: 9px;
  color: #756b79;
  font-size: 12px;
}

.phone-view[data-view="moments"] .moment-image-full {
  width: 100%;
  height: 100%;
  border-radius: 28px;
  background: #f3eee8;
}

.phone-view[data-view="moments"] .moment-image-full img {
  object-fit: cover;
}

@media (min-width: 1440px) {
  .hero {
    grid-template-columns: minmax(0, 1fr) minmax(520px, .92fr);
    gap: clamp(48px, 5vw, 96px);
  }

  .hero h1 {
    max-width: 850px;
  }

  .promise-inner {
    grid-template-columns: minmax(420px, .82fr) minmax(560px, 1.18fr);
    gap: clamp(80px, 7vw, 140px);
  }

  .app-story-layout {
    grid-template-columns: minmax(460px, .88fr) minmax(560px, 1.12fr);
    gap: clamp(70px, 7vw, 130px);
  }
}

@media (min-width: 1021px) and (max-width: 1260px) {
  .hero {
    gap: 38px;
  }

  .hero h1 {
    font-size: clamp(50px, 5.7vw, 68px);
  }

  .app-story-layout {
    grid-template-columns: minmax(320px, .88fr) minmax(0, 1.12fr);
    gap: 42px;
  }

  .iphone {
    width: 286px;
    height: 590px;
  }

  .phone-stage {
    min-height: 650px;
  }

  .feature-step h3 {
    font-size: clamp(38px, 4.2vw, 52px);
  }

  .system-heading h2 {
    font-size: clamp(48px, 5.5vw, 66px);
  }
}

@media (min-width: 1021px) and (max-width: 1439px) {
  .promise-inner {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
    gap: clamp(36px, 4vw, 64px);
  }

  .promise-sticky {
    position: sticky;
    top: 110px;
  }

  .promise-sticky h2 {
    max-width: 680px;
    font-size: clamp(44px, 4.25vw, 58px);
    line-height: 1.08;
    text-wrap: pretty;
  }
}

@media (max-width: 700px) {
  .hero h1,
  .film-intro h2,
  .editorial-heading h2,
  .promise-sticky h2,
  .system-heading h2,
  .app-story-title h2,
  .feature-step h3,
  .download-copy h2 {
    text-wrap: pretty;
  }

  .editorial-heading h2 span {
    white-space: normal;
  }

  .app-story-title {
    padding-inline: 8px;
  }

  .app-story-title h2 {
    width: auto;
    white-space: normal;
  }

  .film-screen:hover {
    transform: none;
    box-shadow: 0 30px 70px rgba(0, 0, 0, .22);
  }
}

/* 统一 01—05 板块主标题字号 */
.film-intro h2,
.editorial-heading h2,
.promise-sticky h2,
.system-heading h2,
.app-story-title h2,
.reviews-heading h2 {
  font-size: clamp(30px, 4.15vw, 69px);
}

@media (max-width: 700px) {
  .film-intro h2,
  .editorial-heading h2,
  .promise-sticky h2,
  .system-heading h2,
  .app-story-title h2,
  .reviews-heading h2 {
    font-size: clamp(29px, 9.5vw, 43px);
  }
}

/* 06 / USER REVIEWS */
.reviews-section {
  padding: 82px 0 92px;
  background: transparent;
}

.reviews-heading h2 {
  max-width: 1080px;
  margin: 20px 0 22px;
  line-height: 1.08;
  font-weight: 700;
  letter-spacing: -.052em;
  text-wrap: balance;
}

.reviews-heading > p:last-child {
  max-width: 720px;
  margin: 0;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.6;
}

.reviews-carousel {
  --reviews-visible: 3;
  --reviews-gap: 20px;
  width: var(--shell);
  margin: 50px auto 0;
}

.reviews-viewport {
  overflow: hidden;
}

.reviews-slider-track {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: calc((100% - (var(--reviews-gap) * (var(--reviews-visible) - 1))) / var(--reviews-visible));
  gap: var(--reviews-gap);
  align-items: stretch;
  transition: transform .72s cubic-bezier(.22, 1, .36, 1);
  will-change: transform;
}

.review-card {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  min-width: 0;
  height: 100%;
  padding: 32px 28px 38px;
  border-radius: 24px;
  border: 0;
  background: transparent;
  color: var(--ink);
}

.review-card::before {
  content: "";
  position: absolute;
  z-index: -1;
  inset: 7px 0;
  border-radius: 24px;
  background: linear-gradient(110deg, rgba(255,255,255,.8), rgba(239,229,248,.52), rgba(255,248,225,.46));
  opacity: 0;
  transform: scaleX(.96);
  transform-origin: center;
  transition: opacity .65s cubic-bezier(.22,1,.36,1), transform .8s cubic-bezier(.22,1,.36,1), box-shadow .8s cubic-bezier(.22,1,.36,1);
}

.review-meta,
.review-card blockquote {
  transition: transform .75s cubic-bezier(.22,1,.36,1);
}

@media (hover: hover) and (pointer: fine) {
  .review-card:hover::before {
    opacity: 1;
    transform: scaleX(1);
  }

  .review-card:hover .review-meta,
  .review-card:hover blockquote {
    transform: translateX(12px);
  }
}

.review-card:active::before {
  transform: scaleX(.992) scaleY(.97);
}

.review-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  padding-inline: 16px;
  color: var(--ink);
}

.review-meta span {
  font-size: 16px;
  font-weight: 800;
  letter-spacing: .01em;
}

.review-meta span + span::before {
  content: "·";
  margin: 0 10px;
  color: var(--purple);
}

.review-card blockquote {
  position: relative;
  margin: 24px 0 0;
  padding: 8px 16px 4px;
  font-size: 16px;
  line-height: 1.72;
  letter-spacing: -.012em;
}

.review-card blockquote::before,
.review-card blockquote::after {
  position: absolute;
  color: #b99ad3;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 42px;
  font-weight: 900;
  line-height: 1;
}

.review-card blockquote::before,
.review-card blockquote::after {
  opacity: .48;
}

.review-card blockquote::before {
  content: "“";
  top: -5px;
  left: -3px;
}

.review-card blockquote::after {
  content: "”";
  right: -1px;
  bottom: -15px;
}

.reviews-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 18px;
}

.reviews-arrows {
  display: flex;
  gap: 10px;
}

.reviews-arrow {
  display: grid;
  width: 50px;
  height: 50px;
  padding: 0;
  place-items: center;
  border: 1px solid rgba(40, 36, 45, .22);
  border-radius: 50%;
  background: transparent;
  color: var(--ink);
  font: inherit;
  font-size: 20px;
  cursor: pointer;
  transition: color .3s ease, background-color .3s ease, border-color .3s ease, opacity .3s ease;
}

.reviews-arrow:hover:not(:disabled) {
  border-color: var(--ink);
  background: var(--ink);
  color: #fff;
}

.reviews-arrow:focus-visible {
  outline: 3px solid rgba(154, 120, 191, .35);
  outline-offset: 3px;
}

.reviews-arrow:disabled {
  opacity: .3;
  cursor: default;
}

@media (min-width: 1021px) and (max-width: 1260px) {
  .desktop-nav {
    gap: 18px;
  }

  .desktop-nav a {
    font-size: 12px;
  }
}

@media (max-width: 700px) {
  .promise-card {
    min-height: 210px;
    padding: 26px 28px;
  }

  .promise-card h3 {
    margin-top: 28px;
    font-size: 23px;
  }

  .reviews-section {
    padding: 64px 0 70px;
  }

  .reviews-heading h2 {
    margin-bottom: 22px;
    text-wrap: pretty;
  }

  .reviews-heading > p:last-child {
    font-size: 16px;
  }

  .reviews-carousel {
    --reviews-visible: 1;
    --reviews-gap: 14px;
    margin-top: 36px;
  }

  .review-card {
    padding: 27px 4px 30px;
  }

  .review-card blockquote {
    margin-top: 22px;
    font-size: 15px;
    line-height: 1.65;
  }

  .reviews-arrow {
    width: 46px;
    height: 46px;
  }
}

@media (min-width: 701px) and (max-width: 1020px) {
  .reviews-carousel {
    --reviews-visible: 2;
    --reviews-gap: 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .reviews-slider-track {
    transition: none;
  }

  .review-card::before,
  .review-meta,
  .review-card blockquote {
    transition: none;
  }
}

/* 首屏标题：保持第二句语义完整，避免在“你 / 更”之间断行 */
.hero h1 em {
  white-space: nowrap;
}

@media (min-width: 1021px) and (max-width: 1260px) {
  .hero h1 {
    font-size: clamp(48px, 4.6vw, 58px);
  }
}

@media (max-width: 700px) {
  .hero h1 {
    font-size: clamp(34px, 10.5vw, 44px);
  }
}

/* 旧浏览器兼容：仅在不支持独立 translate / scale 属性时启用 */
@supports not (translate: 0) {
  .floating-label:hover {
    transform: translateY(-7px) scale(1.04);
  }

  .system-node {
    transform: translateY(38px) scale(.96);
    transition: opacity .75s var(--ease), transform .75s var(--ease), box-shadow .45s var(--ease), background .45s;
  }

  .system-canvas.visible .system-node {
    transform: translateY(0) scale(1);
  }

  .system-node:hover {
    transform: translateY(-12px) scale(1.025);
  }

  .footer-links a:hover {
    transform: translateX(5px);
  }

  .hero-product:hover,
  .download-visual img:hover {
    transform: translateY(-10px);
  }
}

/* 手机触控兼容：扩大点击热区，不改变元素的视觉尺寸与位置 */
@media (max-width: 700px) and (hover: none) and (pointer: coarse) {
  .brand {
    padding-block: 8px;
    margin-block: -8px;
  }

  .mobile-nav a {
    padding-block: 11px;
    margin-block: -11px;
  }

  .footer-links a {
    padding-block: 12px;
    margin-block: -12px;
  }

  .menu-toggle {
    position: relative;
  }

  .menu-toggle::before {
    position: absolute;
    inset: -1px;
    content: "";
  }
}

/* 2026-08-12：主页各板块大标题统一缩小 20% */
.hero h1 {
  font-size: clamp(40px, 4.28vw, 65.6px);
}

.film-intro h2,
.editorial-heading h2,
.promise-sticky h2,
.system-heading h2,
.app-story-title h2,
.reviews-heading h2 {
  font-size: clamp(24px, 3.32vw, 55.2px);
}

.feature-step h3 {
  font-size: clamp(28.8px, 3.2vw, 48.8px);
}

.download-copy h2 {
  font-size: clamp(40px, 4.8vw, 72.8px);
}

.footer-brand h2 {
  font-size: clamp(25.6px, 2.8vw, 42.4px);
}

/* 05 / QinoAI APP：标题区与其他编号板块共用同一页面基准线 */
.app-story-title {
  width: var(--shell);
  max-width: none;
  margin-inline: auto;
  padding-inline: 0;
}

@media (max-width: 700px) {
  .hero h1 {
    font-size: clamp(27.2px, 8.4vw, 35.2px);
  }

  .film-intro h2,
  .editorial-heading h2,
  .promise-sticky h2,
  .system-heading h2,
  .app-story-title h2,
  .reviews-heading h2 {
    font-size: clamp(23.2px, 7.6vw, 34.4px);
  }

  .feature-step h3 {
    font-size: 30.4px;
  }

  .download-copy h2 {
    font-size: 40.8px;
  }

  .footer-brand h2 {
    font-size: 25.6px;
  }

  .app-story-title {
    width: var(--shell);
    margin-inline: auto;
    padding-inline: 0;
  }

  /* 02 / FIRST PRINCIPLE：移动端标题保持单行 */
  .principle-item {
    grid-template-columns: 28px minmax(0, 1fr);
    gap: 10px;
    padding-block: 34px;
  }

  .principle-item h3 {
    font-size: clamp(15px, 5vw, 23px);
    line-height: 1.18;
    letter-spacing: -.04em;
    white-space: nowrap;
    text-wrap: nowrap;
  }
}

/* 04 / QINOKID SYSTEM：最终响应式覆盖 */
.system-core[data-qino-orb] {
  width: 280px;
  height: 280px;
}

/* 05 → 06 板块间距：160px 缩小 20% 至 128px */
.feature-steps {
  padding-bottom: 128px;
}

.system-rings i {
  --qino-ripple-stroke: 3px;
  animation-name: qino-ring-ripple-strong;
}

@media (min-width: 701px) and (max-width: 1020px) {
  .system-core[data-qino-orb] {
    width: clamp(250px, 27vw, 280px);
    height: clamp(250px, 27vw, 280px);
  }
}

@media (max-width: 700px) {
  /* 80px 缩小 20% 至 64px */
  .feature-steps {
    padding-bottom: 64px;
  }

  .system-canvas {
    display: flex;
    min-height: 0;
    padding: 38px 20px 24px;
    flex-direction: column;
    align-items: center;
    gap: 18px;
    overflow: hidden;
    background-position: 43% center;
  }

  .system-core[data-qino-orb] {
    position: relative;
    z-index: 3;
    left: auto;
    top: auto;
    width: min(230px, 66vw);
    height: min(230px, 66vw);
    flex: 0 0 auto;
    order: 0;
    margin: 5px auto 20px;
    transform: none;
  }

  .system-rings i {
    --qino-ripple-stroke: 2.5px;
  }

  .system-rings {
    z-index: 1;
    top: 32px;
    right: 0;
    bottom: auto;
    height: min(250px, 72vw);
  }

  .system-rings i:nth-child(1) {
    width: min(350px, 96vw);
    height: min(350px, 96vw);
  }

  .system-rings i:nth-child(2) {
    width: min(285px, 82vw);
    height: min(285px, 82vw);
  }

  .system-rings i:nth-child(3) {
    width: min(225px, 65vw);
    height: min(225px, 65vw);
  }

  .system-node,
  .system-canvas.visible .system-node {
    position: relative;
    z-index: 4;
    left: auto;
    right: auto;
    top: auto;
    bottom: auto;
    width: 100%;
    max-width: 430px;
    min-height: 0;
    padding: 22px 24px;
    opacity: 1;
    transform: none;
    translate: none;
    scale: 1;
  }

  .system-node:hover {
    transform: translateY(-4px);
  }

  .node-one { order: 1; }
  .node-two { order: 2; }
  .node-three { order: 3; }
}

/* 04 / QINOKID SYSTEM：桌面端节点增强悬停反馈 */
@media (hover: hover) and (pointer: fine) {
  .system-node {
    transform-origin: center;
    will-change: transform, box-shadow;
    transition:
      opacity .75s var(--ease),
      translate .5s cubic-bezier(.22, 1, .36, 1),
      scale .5s cubic-bezier(.22, 1, .36, 1),
      transform .5s cubic-bezier(.22, 1, .36, 1),
      box-shadow .5s ease,
      border-color .4s ease,
      background-color .4s ease;
  }

  .system-node:hover {
    z-index: 6;
    translate: 0 -16px;
    scale: 1.075;
    transform: none;
    border-color: rgba(139, 99, 180, .48);
    background-color: rgba(255, 255, 255, .50);
    box-shadow:
      0 38px 85px rgba(79, 52, 98, .24),
      0 8px 24px rgba(255, 255, 255, .72) inset;
  }
}

/* 触控设备保持稳定尺寸，避免轻触后停留在放大状态 */
@media (hover: none), (pointer: coarse) {
  .system-node:hover {
    translate: none;
    scale: 1;
    transform: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .system-node {
    transition: none !important;
  }

  .system-node:hover {
    translate: none;
    scale: 1;
  }
}