/* ==========================================================================
   海蒂和爷爷 HEIDI · 品牌官网样式
   色彩取自品牌手册：主色 #00A86B / 奶白 #FFFEF9 / 深灰 #2E2E2E
   ========================================================================== */

:root {
  --green: #00A86B;
  --green-deep: #05724A;
  --green-ink: #063A28;
  --cream: #FFFEF9;
  --sand: #F5F1E7;
  --ink: #2E2E2E;
  --ink-soft: #5C5C56;
  --line: #E5E0D3;
  --gold: #A8804A;

  --font-sans: "HarmonyOS Sans SC", "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", "Source Han Sans SC", system-ui, sans-serif;
  --font-serif: Georgia, "Times New Roman", "Songti SC", "SimSun", serif;

  --wrap: 1200px;
  --gutter: clamp(20px, 5vw, 56px);
  --radius: 4px;
  --ease: cubic-bezier(.22, .61, .36, 1);
}

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

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

body {
  margin: 0;
  background: var(--cream);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent; /* 微信/iOS 点击不再闪灰块 */
}

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

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

h1, h2, h3, h4, p, figure, blockquote { margin: 0; }

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

/* 焦点可见性：键盘导航必须清晰可辨 ------------------------------- */
:focus-visible {
  outline: 3px solid var(--green-deep);
  outline-offset: 3px;
  border-radius: 2px;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: -80px;
  z-index: 999;
  padding: 12px 20px;
  background: var(--green-deep);
  color: #fff;
  font-size: 14px;
  border-radius: var(--radius);
  transition: top .2s var(--ease);
}
.skip-link:focus { top: 16px; }

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* 通用排版 ------------------------------------------------------- */
.eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  letter-spacing: .22em;
  color: var(--green-deep);
  font-weight: 600;
  text-transform: uppercase;
}
.eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: var(--green);
}

.h2 {
  font-size: clamp(24px, 3.4vw, 38px);
  line-height: 1.45;
  font-weight: 700;
  letter-spacing: .01em;
  margin-top: 18px;
}

.lead {
  font-size: clamp(15px, 1.4vw, 17px);
  color: var(--ink-soft);
  max-width: 62ch;
  margin-top: 18px;
}

.section { padding-block: clamp(64px, 9vw, 116px); }
.section--sand { background: var(--sand); }

/* 固定头部高度补偿：锚点跳转时标题不被导航遮挡 */
[id] { scroll-margin-top: 96px; }

.section-head { margin-bottom: clamp(36px, 5vw, 60px); }

/* 按钮 ----------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 30px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1;
  cursor: pointer;
  transition: background .25s var(--ease), color .25s var(--ease),
    border-color .25s var(--ease), transform .25s var(--ease);
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn--primary {
  background: var(--green-deep);
  color: #fff;
}
.btn--primary:hover { background: var(--green-ink); }

.btn--ghost {
  background: transparent;
  color: var(--green-deep);
  border-color: currentColor;
}
.btn--ghost:hover { background: var(--green-deep); color: #fff; }

.btn--light {
  background: var(--cream);
  color: var(--green-ink);
}
.btn--light:hover { background: #fff; }

.btn__arrow { font-size: 13px; transform: translateX(0); transition: transform .25s var(--ease); }
.btn:hover .btn__arrow { transform: translateX(4px); }

/* 顶部导航 ------------------------------------------------------- */
.header {
  position: fixed;
  top: 0;
  right: 0;
  left: 0;
  z-index: 100;
  transition: background .3s var(--ease), box-shadow .3s var(--ease);
}
.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 78px;
}
.header.is-scrolled {
  background: rgba(255, 254, 249, .92);
  -webkit-backdrop-filter: saturate(1.4) blur(12px); /* iOS / 微信 WKWebView 必须带前缀 */
  backdrop-filter: saturate(1.4) blur(12px);
  box-shadow: 0 1px 0 var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  flex: 0 0 auto;
}
.brand__mark { width: 34px; height: 34px; flex: 0 0 34px; }
.brand__text { display: flex; flex-direction: column; line-height: 1.05; }
.brand__en {
  font-family: var(--font-serif);
  font-size: 19px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--green-ink);
}
.brand__cn {
  font-size: 10.5px;
  letter-spacing: .3em;
  color: var(--ink-soft);
  margin-top: 3px;
}

.nav { display: flex; align-items: center; gap: 34px; }
.nav a {
  position: relative;
  font-size: 14.5px;
  color: var(--ink);
  padding-block: 6px;
}
.nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1.5px;
  background: var(--green);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .3s var(--ease);
}
.nav a:hover::after,
.nav a[aria-current="true"]::after { transform: scaleX(1); }

.header__cta { flex: 0 0 auto; }
.header__cta .btn { padding: 11px 24px; font-size: 14px; }

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  background: none;
  border: 1px solid var(--line);
  border-radius: 50%;
  cursor: pointer;
  color: var(--ink);
}
.nav-toggle__bars {
  position: relative;
  width: 18px;
  height: 1.5px;
  background: currentColor;
  transition: background .2s var(--ease);
}
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 1.5px;
  background: currentColor;
  transition: transform .25s var(--ease);
}
.nav-toggle__bars::before { top: -6px; }
.nav-toggle__bars::after { top: 6px; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after { transform: translateY(-6px) rotate(-45deg); }

/* 首屏 ----------------------------------------------------------- */
.hero {
  position: relative;
  padding-top: clamp(120px, 16vh, 168px);
  padding-bottom: clamp(56px, 8vw, 96px);
  background:
    radial-gradient(120% 80% at 78% 8%, rgba(0, 168, 107, .09), transparent 62%),
    var(--cream);
  overflow: hidden;
}
.hero__grid {
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: clamp(32px, 6vw, 84px);
  align-items: center;
}
.hero__title {
  font-size: clamp(34px, 5.4vw, 62px);
  line-height: 1.28;
  font-weight: 700;
  letter-spacing: .01em;
  margin-top: 22px;
}
.hero__title em {
  font-style: normal;
  color: var(--green-deep);
}
.hero__lead {
  margin-top: 26px;
  font-size: clamp(15px, 1.5vw, 17.5px);
  color: var(--ink-soft);
  max-width: 34em;
}
.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 40px;
}
.hero__note {
  margin-top: 32px;
  font-size: 12.5px;
  color: var(--ink-soft);
  letter-spacing: .02em;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  max-width: 30em;
}

.hero__media {
  position: relative;
  justify-self: end;
  width: 100%;
  max-width: 460px;
}
.hero__frame {
  position: relative;
  border-radius: 300px 300px 10px 10px;
  overflow: hidden;
  aspect-ratio: 4 / 5;
  background: var(--sand);
}
.hero__frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.hero__badge {
  position: absolute;
  left: -18px;
  bottom: 34px;
  background: var(--cream);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 20px;
  box-shadow: 0 12px 30px rgba(6, 58, 40, .1);
}
.hero__badge dt {
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--ink-soft);
}
.hero__badge dd {
  margin: 4px 0 0;
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 700;
  color: var(--green-deep);
}

/* 品牌理念 ------------------------------------------------------- */
.quote {
  font-size: clamp(26px, 3.8vw, 46px);
  line-height: 1.5;
  font-weight: 700;
  letter-spacing: .02em;
  margin-top: 20px;
}
.quote span { color: var(--green-deep); }
.quote-en {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 15px;
  color: var(--ink-soft);
  margin-top: 16px;
  letter-spacing: .04em;
}

.pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  margin-top: clamp(40px, 6vw, 68px);
  background: var(--line);
  border-block: 1px solid var(--line);
}
.pillar {
  background: var(--cream);
  padding: clamp(26px, 3.4vw, 40px) clamp(20px, 2.6vw, 32px);
}
.pillar__no {
  font-family: var(--font-serif);
  font-size: 13px;
  color: var(--green);
  letter-spacing: .1em;
}
.pillar h3 {
  font-size: 19px;
  font-weight: 700;
  margin-top: 12px;
}
.pillar p {
  font-size: 14.5px;
  color: var(--ink-soft);
  margin-top: 10px;
}

/* 产品矩阵 ------------------------------------------------------- */
.products {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: clamp(16px, 2.2vw, 26px);
}
.card {
  background: var(--cream);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform .35s var(--ease), box-shadow .35s var(--ease);
}
.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 18px 40px rgba(6, 58, 40, .1);
}
.card__media {
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--sand);
}
.card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .6s var(--ease);
}
.card:hover .card__media img { transform: scale(1.05); }
.card__body { padding: 20px 22px 24px; }
.card__tag {
  display: inline-block;
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--green-deep);
  background: rgba(0, 168, 107, .1);
  padding: 3px 9px;
  border-radius: 2px;
}
.card h3 {
  font-size: 17.5px;
  font-weight: 700;
  margin-top: 12px;
}
.card p {
  font-size: 13.5px;
  color: var(--ink-soft);
  margin-top: 8px;
  line-height: 1.7;
}

.feature {
  display: grid;
  grid-template-columns: .85fr 1.15fr;
  gap: clamp(24px, 4vw, 56px);
  align-items: center;
  margin-top: clamp(24px, 3vw, 36px);
  padding: clamp(24px, 3.4vw, 40px);
  background: var(--sand);
  border-radius: var(--radius);
}
.feature__media {
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 1 / 1;
}
.feature__media img { width: 100%; height: 100%; object-fit: cover; }
.feature h3 {
  font-size: clamp(22px, 2.6vw, 30px);
  font-weight: 700;
  margin-top: 14px;
}
.feature p {
  color: var(--ink-soft);
  margin-top: 16px;
  font-size: 15px;
}
.feature .btn { margin-top: 28px; }

/* 奶源与工艺（深色数据带） --------------------------------------- */
.band {
  background: var(--green-ink);
  color: #F2F6F1;
  padding-block: clamp(64px, 8vw, 104px);
  background-image: radial-gradient(90% 70% at 15% 0%, rgba(0, 168, 107, .28), transparent 60%);
}
.band .eyebrow { color: #8FE0BE; }
.band .eyebrow::before { background: #8FE0BE; }
.band .h2 { color: #fff; }
.band .lead { color: rgba(242, 246, 241, .72); }

.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  margin-top: clamp(40px, 6vw, 64px);
  background: rgba(255, 255, 255, .16);
}
.stat {
  background: var(--green-ink);
  padding: clamp(22px, 3vw, 34px) clamp(16px, 2vw, 24px);
}
.stat dt {
  font-size: 12.5px;
  letter-spacing: .1em;
  color: rgba(242, 246, 241, .62);
}
.stat dd {
  margin: 10px 0 0;
  font-family: var(--font-serif);
  font-size: clamp(28px, 3.6vw, 42px);
  font-weight: 700;
  color: #fff;
  line-height: 1.1;
}
.stat dd small {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 400;
  color: rgba(242, 246, 241, .7);
  margin-left: 4px;
}
.stat p {
  font-size: 12.5px;
  color: rgba(242, 246, 241, .55);
  margin-top: 12px;
  line-height: 1.6;
}

/* 门店 ----------------------------------------------------------- */
.stores {
  display: grid;
  grid-template-columns: 1.15fr .85fr;
  gap: clamp(28px, 4.5vw, 60px);
  align-items: center;
}
.stores__media {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
}
.stores__media img { width: 100%; }
.stores__cap {
  font-size: 12.5px;
  color: var(--ink-soft);
  margin-top: 12px;
}
.city-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}
.city-list li {
  font-size: 13.5px;
  padding: 7px 15px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--ink-soft);
}
.city-list li.is-soon {
  border-style: dashed;
  color: var(--green-deep);
  border-color: rgba(0, 168, 107, .5);
}

/* 加盟 CTA ------------------------------------------------------- */
.cta {
  background: var(--green-deep);
  color: #fff;
  border-radius: var(--radius);
  padding: clamp(34px, 5vw, 64px);
  background-image: radial-gradient(80% 120% at 100% 0%, rgba(0, 168, 107, .85), transparent 55%);
}
.cta h2 {
  font-size: clamp(24px, 3.2vw, 36px);
  font-weight: 700;
  line-height: 1.45;
}
.cta p {
  margin-top: 16px;
  color: rgba(255, 255, 255, .82);
  max-width: 46ch;
  font-size: 15px;
}
.cta__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 40px;
  margin-top: 34px;
  padding-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, .25);
}
.cta__facts div { min-width: 120px; }
.cta__facts dt { font-size: 12.5px; color: rgba(255, 255, 255, .7); letter-spacing: .06em; }
.cta__facts dd {
  margin: 6px 0 0;
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 700;
}
.cta__action { margin-top: 34px; }

/* 页脚 ----------------------------------------------------------- */
.footer {
  background: var(--sand);
  padding-block: clamp(52px, 7vw, 80px) 0;
  font-size: 14px;
}
.footer__grid {
  display: grid;
  grid-template-columns: 1.4fr .8fr 1fr 1.1fr;
  gap: clamp(28px, 4vw, 52px);
}
.footer h3 {
  font-size: 13px;
  letter-spacing: .14em;
  color: var(--ink-soft);
  margin-bottom: 16px;
  font-weight: 600;
}
.footer p { color: var(--ink-soft); font-size: 13.5px; line-height: 1.85; }
.footer__links li + li { margin-top: 10px; }
.footer__links a { color: var(--ink); font-size: 13.5px; }
.footer__links a:hover { color: var(--green-deep); }
.footer__bottom {
  margin-top: clamp(36px, 5vw, 56px);
  border-top: 1px solid var(--line);
  padding-block: 22px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 28px;
  justify-content: space-between;
  font-size: 12.5px;
  color: var(--ink-soft);
}
.footer__bottom a { color: var(--ink-soft); }
.footer__bottom a:hover { color: var(--green-deep); }

/* 加盟页 --------------------------------------------------------- */
.page-hero {
  padding-top: clamp(120px, 16vh, 172px);
  padding-bottom: clamp(40px, 6vw, 72px);
  background:
    radial-gradient(100% 90% at 85% 0%, rgba(0, 168, 107, .1), transparent 60%),
    var(--cream);
}
.page-hero h1 {
  font-size: clamp(30px, 4.6vw, 50px);
  line-height: 1.35;
  font-weight: 700;
  margin-top: 20px;
  max-width: 20em;
}
.page-hero .lead { margin-top: 22px; }

.model-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border-block: 1px solid var(--line);
}
.model {
  background: var(--cream);
  padding: clamp(26px, 3.4vw, 38px);
}
.model h3 { font-size: 18px; font-weight: 700; margin-top: 12px; }
.model p { font-size: 14px; color: var(--ink-soft); margin-top: 10px; }
.model__icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(0, 168, 107, .1);
  color: var(--green-deep);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-size: 15px;
  font-weight: 700;
}

.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: clamp(18px, 2.4vw, 30px);
  counter-reset: step;
}
.step { position: relative; padding-top: 30px; }
.step::before {
  counter-increment: step;
  content: "0" counter(step);
  position: absolute;
  top: 0;
  left: 0;
  font-family: var(--font-serif);
  font-size: 14px;
  letter-spacing: .08em;
  color: var(--green);
}
.step::after {
  content: "";
  position: absolute;
  top: 9px;
  left: 34px;
  right: 0;
  height: 1px;
  background: var(--line);
}
.step h3 { font-size: 17px; font-weight: 700; }
.step p { font-size: 13.5px; color: var(--ink-soft); margin-top: 8px; }

.form-layout {
  display: grid;
  grid-template-columns: .9fr 1.1fr;
  gap: clamp(32px, 5vw, 72px);
  align-items: start;
}
/* 表单较高，让左侧说明在滚动时跟随，避免出现大片空白 */
.form-layout > .reveal:first-child {
  position: sticky;
  top: 104px;
}
.form {
  background: var(--cream);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: clamp(24px, 3.4vw, 40px);
}
.field + .field { margin-top: 20px; }
.field label {
  display: block;
  font-size: 13.5px;
  font-weight: 600;
  margin-bottom: 8px;
}
.field label span { color: var(--green-deep); margin-left: 3px; }
.field input,
.field select,
.field textarea {
  width: 100%;
  padding: 13px 15px;
  font: inherit;
  font-size: 15px;
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color .2s var(--ease);
}
.field textarea { min-height: 110px; resize: vertical; }
.field input:focus,
.field select:focus,
.field textarea:focus {
  border-color: var(--green);
  outline: none;
  box-shadow: 0 0 0 3px rgba(0, 168, 107, .16);
}
.field__hint { font-size: 12.5px; color: var(--ink-soft); margin-top: 7px; }
.field__error {
  font-size: 12.5px;
  color: #B3261E;
  margin-top: 7px;
  display: none;
}
.field.has-error input,
.field.has-error select { border-color: #B3261E; }
.field.has-error .field__error { display: block; }

.form__note {
  font-size: 12.5px;
  color: var(--ink-soft);
  margin-top: 18px;
  line-height: 1.7;
}
.form__submit { width: 100%; margin-top: 24px; }
.form__status {
  margin-top: 16px;
  font-size: 14px;
  color: var(--green-deep);
  font-weight: 600;
  display: none;
}
.form__status.is-visible { display: block; }

.notice {
  background: var(--sand);
  border-left: 3px solid var(--green);
  padding: 20px 24px;
  border-radius: 0 var(--radius) var(--radius) 0;
  font-size: 13.5px;
  color: var(--ink-soft);
  line-height: 1.85;
}
.notice + .notice { margin-top: 14px; }
.notice b { color: var(--ink); }

/* 滚动进入动画 ---------------------------------------------------
   默认可见；仅当 <html class="anim"> 时才先隐藏再淡入。
   微信内置浏览器若脚本被拦截或报错，页面不会整块空白。
   ----------------------------------------------------------------- */
.anim .reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .7s var(--ease), transform .7s var(--ease);
}
.anim .reveal.is-visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    transition-duration: .001ms !important;
  }
  .anim .reveal { opacity: 1; transform: none; }
}

/* 响应式 --------------------------------------------------------- */
@media (max-width: 1080px) {
  .products { grid-template-columns: repeat(2, 1fr); }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .footer__grid { grid-template-columns: 1fr 1fr; }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .step::after { display: none; }
}

@media (max-width: 880px) {
  .hero__grid { grid-template-columns: 1fr; }
  .hero__media { justify-self: start; max-width: 380px; margin-top: 8px; }
  .hero__badge { left: 12px; bottom: 20px; }
  .pillars { grid-template-columns: 1fr; }
  .stores { grid-template-columns: 1fr; }
  .stores__media { order: -1; }
  .feature { grid-template-columns: 1fr; }
  .feature__media { aspect-ratio: 16 / 10; }
  .form-layout { grid-template-columns: 1fr; }
  .form-layout > .reveal:first-child { position: static; }
  .model-grid { grid-template-columns: 1fr; }

  /* 移动端导航 */
  .nav {
    position: fixed;
    top: 78px;
    right: 0;
    left: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px var(--gutter) 26px;
    background: var(--cream);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 20px 30px rgba(6, 58, 40, .08);
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    transition: opacity .28s var(--ease), transform .28s var(--ease);
  }
  .nav.is-open {
    transform: none;
    opacity: 1;
    pointer-events: auto;
  }
  .nav a {
    padding: 15px 0;
    border-bottom: 1px solid var(--line);
    font-size: 16px;
  }
  .nav a::after { display: none; }
  .nav-toggle { display: inline-flex; }
  .header__cta { display: none; }
  .header.is-scrolled { background: var(--cream); }
}

@media (max-width: 560px) {
  .products { grid-template-columns: 1fr; }
  .stats { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr; }
  .hero__actions .btn { width: 100%; }
  .cta__facts { gap: 24px; }
}

/* ==========================================================================
   微信内置浏览器兼容性兜底
   iOS 微信使用 WKWebView、安卓微信使用 XWeb，内核版本普遍落后于桌面浏览器。
   少量新语法不生效时，下面的规则保证图片不塌陷、内容不空白。
   ========================================================================== */

/* ① aspect-ratio 不被识别时，容器会失去固有高度，内部 height:100% 的图片会塌成 0。
      用 min-height 兜住，图片至少能正常显示。 */
@supports not (aspect-ratio: 1 / 1) {
  .hero__frame { min-height: 380px; }
  .card__media { min-height: 210px; }
  .feature__media { min-height: 250px; }
}

/* ② 触摸设备上没有 hover，去掉依赖悬停的位移效果，避免点击后卡在中间态 */
@media (hover: none) {
  .card:hover { transform: none; }
}