:root {
  --ink: #171916;
  --ink-soft: #4d514b;
  --paper: #ffffff;
  --surface: #f4f6f1;
  --line: #dfe3dc;
  --green: #2f6b4f;
  --green-dark: #194533;
  --coral: #ef674d;
  --yellow: #f2c94c;
  --blue: #2f69c9;
  --shadow: 0 16px 44px rgba(20, 28, 22, 0.14);
  --header-height: 72px;
  --content-width: 1200px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: Inter, "PingFang SC", "Microsoft YaHei", Arial, sans-serif; letter-spacing: 0; }
body.modal-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
button, a { -webkit-tap-highlight-color: transparent; }
button { font: inherit; }
img { display: block; max-width: 100%; }
svg { width: 20px; height: 20px; stroke-width: 1.8; }

.site-header { position: fixed; z-index: 50; top: 0; left: 0; right: 0; height: var(--header-height); padding: 0 max(24px, calc((100vw - var(--content-width)) / 2)); display: flex; align-items: center; justify-content: space-between; color: var(--paper); border-bottom: 1px solid rgba(255,255,255,.18); transition: background-color .2s ease, color .2s ease, border-color .2s ease; }
.site-header.scrolled, .site-header.solid { color: var(--ink); background: rgba(255,255,255,.96); border-color: var(--line); backdrop-filter: blur(12px); }
.brand { display: inline-flex; align-items: center; gap: 10px; font-size: 22px; font-weight: 800; white-space: nowrap; }
.brand-mark { width: 38px; height: 38px; display: inline-flex; align-items: center; justify-content: center; color: var(--paper); background: var(--coral); border-radius: 6px; }
.brand-mark svg { width: 22px; height: 22px; }
.brand-light { color: var(--paper); }
.desktop-nav { display: flex; align-items: center; gap: 32px; font-size: 14px; font-weight: 600; }
.desktop-nav a { position: relative; padding: 25px 0; }
.desktop-nav a::after { content: ""; position: absolute; left: 0; right: 0; bottom: 18px; height: 2px; background: var(--coral); transform: scaleX(0); transition: transform .2s ease; }
.desktop-nav a:hover::after, .desktop-nav a:focus-visible::after { transform: scaleX(1); }
.header-actions { display: flex; align-items: center; gap: 10px; }
.button { min-height: 42px; padding: 0 18px; border: 1px solid transparent; border-radius: 6px; display: inline-flex; align-items: center; justify-content: center; gap: 8px; font-size: 14px; font-weight: 700; cursor: pointer; transition: transform .18s ease, background-color .18s ease, border-color .18s ease, color .18s ease; }
.button:hover { transform: translateY(-2px); }
.button:focus-visible, .icon-button:focus-visible, .capability-tabs button:focus-visible, .language-switch:focus-visible { outline: 3px solid rgba(239,103,77,.35); outline-offset: 2px; }
.button-primary { color: var(--paper); background: var(--coral); }
.button-primary:hover { background: #da533c; }
.button-ghost { color: inherit; border-color: currentColor; background: transparent; }
.button-light { color: var(--ink); background: var(--paper); }
.button-dark { color: var(--paper); background: var(--ink); }
.button-large { min-height: 52px; padding: 0 24px; font-size: 15px; }
.icon-button { width: 42px; height: 42px; padding: 0; border: 1px solid var(--line); border-radius: 6px; display: inline-flex; align-items: center; justify-content: center; color: var(--ink); background: var(--paper); cursor: pointer; }
.menu-button { display: none; }
.mobile-nav { display: none; }

.hero { position: relative; min-height: min(720px, calc(100vh - 48px)); max-height: 780px; display: flex; align-items: center; overflow: hidden; color: var(--paper); background: url("hero-cat.jpg") center 43% / cover no-repeat; }
.hero-shade { position: absolute; inset: 0; background: rgba(8, 13, 9, .60); }
.hero-content { position: relative; z-index: 2; width: min(var(--content-width), calc(100% - 48px)); margin: 56px auto 0; }
.eyebrow { margin: 0 0 14px; color: var(--green); font-size: 12px; font-weight: 800; letter-spacing: 0; text-transform: uppercase; }
.eyebrow.light { color: #d7e9dd; }
.hero h1 { max-width: 800px; margin: 0; font-size: 80px; line-height: 1.05; letter-spacing: 0; }
.hero-lead { max-width: 820px; margin: 22px 0 0; font-size: 30px; line-height: 1.35; font-weight: 650; }
.hero-copy { max-width: 660px; margin: 18px 0 0; color: rgba(255,255,255,.82); font-size: 17px; line-height: 1.8; }
.hero-actions { margin-top: 30px; display: flex; flex-wrap: wrap; gap: 12px; }
.hero-channels { margin-top: 36px; display: flex; flex-wrap: wrap; gap: 18px; color: rgba(255,255,255,.78); font-size: 13px; }
.hero-channels span { display: inline-flex; align-items: center; gap: 8px; }
.hero-channels span::before { content: ""; width: 5px; height: 5px; border-radius: 50%; background: var(--yellow); }

.signal-band { min-height: 112px; padding: 24px max(24px, calc((100vw - var(--content-width)) / 2)); display: grid; grid-template-columns: repeat(3, 1fr); color: var(--paper); background: var(--green-dark); }
.signal-band div { padding: 12px 34px; border-left: 1px solid rgba(255,255,255,.18); display: flex; flex-direction: column; gap: 7px; }
.signal-band div:first-child { border-left: 0; padding-left: 0; }
.signal-band strong { font-size: 18px; }
.signal-band span { color: rgba(255,255,255,.66); font-size: 13px; }

.section { width: min(var(--content-width), calc(100% - 48px)); margin: 0 auto; padding: 108px 0; }
.section-heading { max-width: 760px; margin-bottom: 48px; }
.section-heading.centered { margin-left: auto; margin-right: auto; text-align: center; }
.section-heading h2, .product-copy h2, .about-copy h2, .contact-band h2 { margin: 0; font-size: 42px; line-height: 1.22; letter-spacing: 0; }
.section-heading > p:last-child, .product-copy > p, .about-copy > p { color: var(--ink-soft); font-size: 16px; line-height: 1.85; }
.row-heading { max-width: none; display: flex; align-items: end; justify-content: space-between; gap: 64px; }
.row-heading > div { max-width: 660px; }
.row-heading > p { max-width: 420px; margin: 0; }

.workflow { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.workflow article { min-height: 260px; padding: 28px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); position: relative; background: var(--paper); transition: background-color .2s ease, transform .2s ease; }
.workflow article:hover { z-index: 2; background: var(--surface); transform: translateY(-4px); }
.workflow article > span { position: absolute; top: 22px; right: 24px; color: #9ba099; font-size: 12px; font-weight: 700; }
.workflow article > svg { width: 34px; height: 34px; color: var(--coral); }
.workflow h3, .capability-panel h3, .channel-grid h3 { margin: 34px 0 10px; font-size: 20px; }
.workflow p, .capability-panel p, .channel-grid p { margin: 0; color: var(--ink-soft); font-size: 14px; line-height: 1.7; }

.product-band { min-height: 720px; padding: 96px max(24px, calc((100vw - var(--content-width)) / 2)); display: grid; grid-template-columns: minmax(320px, .8fr) minmax(560px, 1.25fr); align-items: center; gap: 72px; overflow: hidden; color: var(--paper); background: var(--green); }
.product-copy > p { color: rgba(255,255,255,.76); }
.check-list { padding: 0; margin: 32px 0 0; display: grid; gap: 16px; list-style: none; }
.check-list li { display: flex; align-items: center; gap: 12px; color: rgba(255,255,255,.88); font-size: 14px; }
.check-list svg { width: 22px; height: 22px; padding: 4px; border-radius: 50%; color: var(--green-dark); background: var(--yellow); }
.device-composition { position: relative; min-height: 500px; display: flex; align-items: center; }
.desktop-frame { width: 680px; border: 8px solid #222823; border-radius: 8px; overflow: hidden; color: var(--ink); background: #eef1ec; box-shadow: var(--shadow); }
.desktop-bar { height: 36px; padding: 0 12px; display: flex; align-items: center; gap: 6px; background: #242925; color: #aab0aa; }
.desktop-bar span { width: 8px; height: 8px; border-radius: 50%; background: #858b85; }
.desktop-bar b { margin-left: auto; margin-right: auto; font-size: 10px; font-weight: 500; }
.dashboard-shell { height: 390px; display: grid; grid-template-columns: 150px 1fr; }
.dashboard-shell aside { padding: 20px 14px; display: flex; flex-direction: column; gap: 6px; color: #cad6ce; background: #1c382a; }
.dashboard-shell aside strong { margin-bottom: 20px; color: var(--paper); }
.dashboard-shell aside span { padding: 10px 12px; border-radius: 4px; font-size: 11px; }
.dashboard-shell aside .active { color: var(--ink); background: var(--yellow); }
.dashboard-main { padding: 22px; overflow: hidden; }
.dashboard-main header { display: flex; justify-content: space-between; align-items: center; }
.dashboard-main header div { display: flex; flex-direction: column; gap: 4px; }
.dashboard-main header small, .dashboard-main header em { color: #6f756f; font-size: 10px; font-style: normal; }
.dashboard-main header strong { font-size: 18px; }
.metric-row { margin-top: 20px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.metric-row div { padding: 15px; border: 1px solid #d9ded9; border-radius: 5px; background: var(--paper); }
.metric-row span { display: block; color: #6d746e; font-size: 10px; }
.metric-row b { display: block; margin-top: 8px; font-size: 24px; }
.order-table { margin-top: 14px; padding: 17px; border-radius: 5px; background: var(--paper); }
.order-table > strong { font-size: 13px; }
.order-table p { margin: 12px 0 0; padding-top: 12px; border-top: 1px solid #e7e9e7; display: flex; justify-content: space-between; font-size: 10px; }
.order-table em { color: var(--coral); font-style: normal; }
.phone-frame { position: absolute; right: -12px; bottom: -12px; width: 220px; border: 8px solid #202420; border-radius: 30px; overflow: hidden; color: var(--ink); background: var(--paper); box-shadow: 0 20px 50px rgba(0,0,0,.28); }
.phone-status { height: 28px; padding: 0 15px; display: flex; align-items: center; justify-content: space-between; color: var(--paper); background: #202420; font-size: 9px; }
.app-screen header { height: 46px; padding: 0 14px; display: flex; align-items: center; justify-content: space-between; font-size: 13px; font-weight: 800; }
.app-screen header svg { width: 16px; }
.app-screen > img { width: 100%; height: 210px; object-fit: cover; }
.pet-summary { padding: 14px 14px 18px; display: flex; flex-direction: column; }
.pet-summary small { width: fit-content; padding: 3px 6px; color: #884326; background: #ffe0bf; border-radius: 4px; font-size: 8px; }
.pet-summary strong { margin-top: 8px; font-size: 14px; }
.pet-summary span { margin-top: 5px; color: #747a74; font-size: 8px; }
.pet-summary b { margin-top: 12px; padding: 8px; border-radius: 4px; color: var(--paper); background: var(--coral); text-align: center; font-size: 9px; }
.app-screen nav { height: 48px; border-top: 1px solid #e5e8e5; display: grid; grid-template-columns: repeat(4, 1fr); }
.app-screen nav span { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 2px; color: #858a85; font-size: 7px; }
.app-screen nav span.active { color: var(--coral); }
.app-screen nav svg { width: 14px; height: 14px; }

.capability-tabs { min-height: 48px; border-bottom: 1px solid var(--line); display: flex; gap: 34px; overflow-x: auto; }
.capability-tabs button { padding: 0 0 16px; border: 0; border-bottom: 3px solid transparent; color: #777c76; background: transparent; font-weight: 700; white-space: nowrap; cursor: pointer; }
.capability-tabs button.active { color: var(--ink); border-color: var(--coral); }
.capability-panel { margin-top: 38px; display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.capability-panel article { min-height: 250px; padding: 28px; border: 1px solid var(--line); border-radius: 6px; background: var(--paper); }
.capability-panel article > svg { width: 32px; height: 32px; color: var(--green); }

.ecosystem { width: 100%; padding-left: max(24px, calc((100vw - var(--content-width)) / 2)); padding-right: max(24px, calc((100vw - var(--content-width)) / 2)); background: var(--surface); }
.channel-grid { display: grid; grid-template-columns: repeat(7, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); background: var(--paper); }
.channel-grid article { min-height: 190px; padding: 24px 18px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.channel-grid svg { color: var(--coral); }
.channel-grid h3 { margin-top: 24px; font-size: 16px; }
.channel-grid p { font-size: 12px; }
.ecosystem-action { margin-top: 38px; text-align: center; }

.about-band { display: grid; grid-template-columns: 1fr 1fr; min-height: 640px; }
.about-image { min-height: 560px; overflow: hidden; }
.about-image img { width: 100%; height: 100%; object-fit: cover; object-position: center 42%; }
.about-copy { padding: 92px max(32px, calc((100vw - var(--content-width)) / 2)); padding-left: 72px; align-self: center; }
.about-copy > p { max-width: 620px; }
.about-values { margin-top: 30px; display: flex; flex-wrap: wrap; gap: 8px; }
.about-values span { padding: 9px 12px; border-left: 3px solid var(--coral); color: var(--ink-soft); background: var(--surface); font-size: 13px; font-weight: 650; }
.contact-band { padding: 76px max(24px, calc((100vw - var(--content-width)) / 2)); display: flex; align-items: center; justify-content: space-between; gap: 40px; color: var(--paper); background: var(--ink); }
.contact-band p:last-child { color: rgba(255,255,255,.7); }
.contact-actions { display: flex; gap: 12px; flex-shrink: 0; }

.site-footer { padding: 64px max(24px, calc((100vw - var(--content-width)) / 2)) 30px; color: #cdd2cd; background: #101310; }
.footer-brand { display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.footer-brand p { color: #7f877f; }
.footer-links { margin-top: 48px; padding: 24px 0; border-top: 1px solid #2a302b; border-bottom: 1px solid #2a302b; display: flex; gap: 30px; font-size: 13px; }
.footer-links a:hover { color: var(--paper); }
.footer-bottom { padding-top: 24px; display: flex; justify-content: space-between; gap: 24px; color: #727a72; font-size: 12px; }
.site-footer.compact { padding-top: 44px; }

.modal-backdrop { position: fixed; z-index: 100; inset: 0; padding: 24px; background: rgba(0,0,0,.62); display: grid; place-items: center; }
.modal-backdrop[hidden] { display: none; }
.contact-modal { position: relative; width: min(440px, 100%); padding: 38px; border-radius: 8px; background: var(--paper); box-shadow: var(--shadow); }
.contact-modal h2 { margin: 0; font-size: 30px; }
.contact-modal > p:not(.eyebrow) { color: var(--ink-soft); line-height: 1.7; }
.contact-modal code { font-size: 12px; }
.modal-close { position: absolute; top: 14px; right: 14px; }
.contact-placeholder { height: 190px; margin-top: 24px; border: 1px dashed #adb4ad; display: grid; place-items: center; align-content: center; gap: 10px; color: #737a73; }
.contact-placeholder svg { width: 64px; height: 64px; }

/* Download page */
.download-page { background: var(--surface); }
.language-switch { min-width: 44px; height: 36px; padding: 0 10px; border: 1px solid var(--line); border-radius: 4px; color: var(--ink); background: var(--paper); font-weight: 750; cursor: pointer; }
.download-hero { min-height: 700px; padding: calc(var(--header-height) + 56px) max(24px, calc((100vw - var(--content-width)) / 2)) 56px; display: grid; grid-template-columns: 1fr 430px; align-items: center; gap: 80px; overflow: hidden; color: var(--paper); background: var(--green-dark); }
.download-hero-copy h1 { margin: 0; font-size: 66px; line-height: 1.1; }
.download-hero-copy > p:not(.eyebrow):not(.device-tip) { max-width: 660px; font-size: 22px; line-height: 1.6; }
.device-tip { margin-top: 22px; color: #b7cbbb; font-size: 13px; }
.download-phone { width: 310px; margin: 0 auto; border: 10px solid #1c201d; border-radius: 42px; overflow: hidden; color: var(--ink); background: var(--paper); box-shadow: 0 34px 70px rgba(0,0,0,.28); transform: rotate(2deg); }
.download-phone .phone-status { height: 34px; }
.download-app-screen header { height: 56px; padding: 0 18px; display: flex; align-items: center; justify-content: space-between; font-weight: 800; }
.download-app-screen img { width: 100%; height: 330px; object-fit: cover; }
.download-app-screen > div { padding: 18px 20px 24px; }
.download-app-screen small { color: var(--coral); font-weight: 800; }
.download-app-screen h2 { margin: 8px 0; font-size: 22px; }
.download-app-screen p { color: var(--ink-soft); font-size: 12px; }
.download-app-screen button { width: 100%; height: 42px; margin-top: 10px; border: 0; border-radius: 5px; color: var(--paper); background: var(--coral); font-weight: 750; }
.download-section { width: min(var(--content-width), calc(100% - 48px)); }
.app-download-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.app-download-card { position: relative; min-height: 330px; padding: 30px; border: 1px solid var(--line); border-radius: 8px; display: flex; flex-direction: column; background: var(--paper); transition: transform .2s ease, border-color .2s ease; }
.app-download-card:hover { transform: translateY(-4px); }
.app-download-card.recommended { border: 2px solid var(--coral); }
.app-download-card.recommended::before { content: attr(data-recommended-label); position: absolute; top: 16px; right: 16px; padding: 5px 8px; border-radius: 4px; color: var(--paper); background: var(--coral); font-size: 11px; font-weight: 750; }
.platform-icon { width: 54px; height: 54px; border-radius: 8px; display: inline-flex; align-items: center; justify-content: center; color: var(--paper); background: var(--ink); }
.platform-icon.harmony { background: var(--blue); }
.platform-icon.android { background: var(--green); }
.platform-icon svg { width: 28px; height: 28px; }
.app-download-card h3 { margin: 5px 0 10px; font-size: 26px; }
.app-download-card small { color: #777d77; font-size: 11px; }
.app-download-card p { min-height: 48px; color: var(--ink-soft); font-size: 14px; line-height: 1.7; }
.app-download-card .button { margin-top: auto; align-self: flex-start; }
.app-download-card > em { margin-top: 12px; color: #8a908a; font-size: 11px; font-style: normal; }
.international-note { margin-top: 22px; padding: 24px 28px; border-left: 4px solid var(--yellow); display: flex; align-items: center; gap: 18px; background: #fff9df; }
.international-note > svg { width: 30px; height: 30px; color: #927000; }
.international-note strong { display: block; margin-bottom: 5px; }
.international-note p { margin: 0; color: #655b37; font-size: 13px; line-height: 1.6; }
.wechat-band { padding: 100px max(24px, calc((100vw - var(--content-width)) / 2)); display: grid; grid-template-columns: .7fr 1.3fr; align-items: center; gap: 70px; color: var(--paper); background: var(--green); }
.wechat-band .section-heading { margin: 0; }
.wechat-band .section-heading > p:last-child { color: rgba(255,255,255,.72); }
.wechat-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.wechat-grid article { min-height: 260px; padding: 24px; border: 1px solid rgba(255,255,255,.2); border-radius: 8px; display: grid; grid-template-columns: 150px 1fr; align-items: center; gap: 22px; background: rgba(255,255,255,.08); }
.qr-placeholder { width: 150px; aspect-ratio: 1; border-radius: 6px; display: grid; place-items: center; align-content: center; gap: 6px; color: var(--ink); background: var(--paper); }
.qr-placeholder svg { width: 76px; height: 76px; }
.qr-placeholder span { color: #6f756f; font-size: 10px; font-weight: 700; }
.qr-placeholder img { width: 100%; height: 100%; object-fit: contain; }
.wechat-grid small { color: #bed5c5; font-size: 10px; font-weight: 800; }
.wechat-grid h3 { margin: 7px 0; font-size: 20px; }
.wechat-grid p { color: rgba(255,255,255,.7); font-size: 13px; line-height: 1.6; }
.help-grid { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.help-grid article { min-height: 180px; padding: 28px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); display: flex; gap: 18px; background: var(--paper); }
.help-grid article > span { color: var(--coral); font-size: 13px; font-weight: 800; }
.help-grid h3 { margin: 0 0 10px; font-size: 18px; }
.help-grid p { margin: 0; color: var(--ink-soft); font-size: 13px; line-height: 1.7; }
.toast { position: fixed; z-index: 120; left: 50%; bottom: 30px; max-width: calc(100% - 32px); padding: 12px 18px; border-radius: 6px; color: var(--paper); background: var(--ink); box-shadow: var(--shadow); opacity: 0; transform: translate(-50%, 16px); pointer-events: none; transition: opacity .2s ease, transform .2s ease; }
.toast.show { opacity: 1; transform: translate(-50%, 0); }

@media (max-width: 1080px) {
  .desktop-nav { gap: 20px; }
  .product-band { grid-template-columns: 1fr; }
  .product-copy { max-width: 720px; }
  .device-composition { justify-content: center; }
  .channel-grid { grid-template-columns: repeat(4, 1fr); }
  .wechat-band { grid-template-columns: 1fr; }
}

@media (max-width: 820px) {
  :root { --header-height: 64px; }
  .site-header { padding: 0 18px; }
  .desktop-nav, .desktop-only { display: none; }
  .menu-button { display: inline-flex; }
  .mobile-nav { position: absolute; top: var(--header-height); left: 0; right: 0; padding: 12px 18px 20px; border-bottom: 1px solid var(--line); display: none; flex-direction: column; color: var(--ink); background: var(--paper); }
  .mobile-nav.open { display: flex; }
  .mobile-nav a { padding: 12px 4px; border-bottom: 1px solid #edf0ec; font-weight: 650; }
  .hero { min-height: calc(100vh - 36px); max-height: none; background-position: 60% center; }
  .hero-content { width: calc(100% - 36px); margin-top: 48px; }
  .hero h1 { font-size: 54px; }
  .hero-lead { font-size: 24px; }
  .hero-copy { font-size: 15px; }
  .hero-channels { gap: 10px 16px; }
  .signal-band { grid-template-columns: 1fr; padding: 16px 18px; }
  .signal-band div, .signal-band div:first-child { padding: 16px 0; border-left: 0; border-top: 1px solid rgba(255,255,255,.15); }
  .signal-band div:first-child { border-top: 0; }
  .section { width: calc(100% - 36px); padding: 76px 0; }
  .section-heading h2, .product-copy h2, .about-copy h2, .contact-band h2 { font-size: 32px; }
  .row-heading { align-items: start; flex-direction: column; gap: 18px; }
  .workflow { grid-template-columns: 1fr 1fr; }
  .workflow article { min-height: 235px; padding: 24px; }
  .product-band { padding: 72px 18px; gap: 42px; }
  .device-composition { min-height: 430px; justify-content: flex-start; }
  .desktop-frame { width: calc(100% - 34px); }
  .dashboard-shell { height: 330px; grid-template-columns: 112px 1fr; }
  .dashboard-shell aside { padding: 16px 10px; }
  .metric-row { grid-template-columns: 1fr 1fr; }
  .metric-row div:last-child { display: none; }
  .phone-frame { right: 0; width: 180px; }
  .app-screen > img { height: 160px; }
  .capability-panel { grid-template-columns: 1fr 1fr; }
  .channel-grid { grid-template-columns: repeat(2, 1fr); }
  .about-band { grid-template-columns: 1fr; }
  .about-image { min-height: 420px; }
  .about-copy { padding: 64px 18px; }
  .contact-band { padding: 64px 18px; align-items: flex-start; flex-direction: column; }
  .footer-brand, .footer-bottom { align-items: flex-start; flex-direction: column; }
  .footer-links { flex-wrap: wrap; }
  .download-hero { min-height: 760px; padding: 110px 18px 54px; grid-template-columns: 1fr 260px; gap: 24px; }
  .download-hero-copy h1 { font-size: 48px; }
  .download-hero-copy > p:not(.eyebrow):not(.device-tip) { font-size: 18px; }
  .download-phone { width: 240px; }
  .download-app-screen img { height: 240px; }
  .app-download-grid { grid-template-columns: 1fr; }
  .wechat-band { padding: 76px 18px; }
  .help-grid { grid-template-columns: 1fr; }
}

@media (max-width: 560px) {
  .brand { font-size: 19px; }
  .brand-mark { width: 34px; height: 34px; }
  .hero { background-position: 63% center; }
  .hero-content { padding-top: 32px; }
  .hero h1 { font-size: 46px; }
  .hero-lead { font-size: 21px; }
  .hero-actions { align-items: stretch; flex-direction: column; }
  .hero-actions .button { width: 100%; }
  .hero-channels { margin-top: 24px; }
  .workflow { grid-template-columns: 1fr; }
  .workflow article { min-height: 210px; }
  .device-composition { min-height: 450px; }
  .desktop-frame { width: 100%; align-self: flex-start; }
  .dashboard-shell { height: 280px; grid-template-columns: 86px 1fr; }
  .dashboard-shell aside span { padding: 8px 6px; font-size: 8px; }
  .dashboard-main { padding: 12px; }
  .metric-row b { font-size: 18px; }
  .phone-frame { right: -4px; bottom: -4px; width: 150px; border-width: 6px; border-radius: 24px; }
  .app-screen > img { height: 125px; }
  .pet-summary { padding: 10px; }
  .pet-summary span { display: none; }
  .capability-panel { grid-template-columns: 1fr; }
  .capability-panel article { min-height: 220px; }
  .channel-grid { grid-template-columns: 1fr 1fr; }
  .channel-grid article { min-height: 170px; }
  .contact-actions { width: 100%; flex-direction: column; }
  .contact-actions .button { width: 100%; }
  .download-hero { min-height: 860px; grid-template-columns: 1fr; text-align: left; }
  .download-hero-copy h1 { font-size: 44px; }
  .download-phone { width: 220px; transform: none; }
  .download-app-screen img { height: 210px; }
  .download-app-screen > div { padding: 14px 16px 18px; }
  .download-app-screen p { margin: 6px 0; }
  .wechat-grid { grid-template-columns: 1fr; }
  .wechat-grid article { min-height: 220px; grid-template-columns: 120px 1fr; }
  .qr-placeholder { width: 120px; }
  .footer-links { gap: 16px 24px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}