:root {
  --blue-950: #071d42;
  --blue-900: #0b2857;
  --blue-800: #123f84;
  --blue-700: #1760c7;
  --blue-600: #2479e8;
  --blue-500: #3a8cf2;
  --blue-100: #dcecff;
  --blue-50: #eef6ff;
  --mint-500: #45d4a2;
  --mint-100: #d7f8ec;
  --ink: #10213d;
  --muted: #53657f;
  --line: #dce7f4;
  --paper: #ffffff;
  --canvas: #f5f9ff;
  --shadow-soft: 0 24px 70px rgba(30, 83, 148, 0.13);
  --shadow-card: 0 14px 36px rgba(31, 77, 134, 0.09);
  --page: min(1180px, calc(100% - 48px));
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 84px; }
body {
  margin: 0;
  overflow-x: hidden;
  color: var(--ink);
  background: var(--canvas);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, a, summary { -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: 3px solid #ffb84d; outline-offset: 4px; border-radius: 8px; }
::selection { color: var(--blue-950); background: var(--mint-100); }

.skip-link {
  position: fixed;
  z-index: 1000;
  top: 12px;
  left: 12px;
  min-height: 44px;
  padding: 9px 16px;
  color: #fff;
  background: var(--blue-900);
  border-radius: 10px;
  transform: translateY(-150%);
}
.skip-link:focus { transform: translateY(0); }
.page-shell { width: var(--page); margin-inline: auto; }
.section-pad { padding: clamp(76px, 9vw, 132px) 0; }

.site-header {
  position: sticky;
  z-index: 50;
  top: 0;
  height: 72px;
  border-bottom: 1px solid rgba(198, 216, 238, 0.72);
  background: rgba(248, 251, 255, 0.88);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
}
.site-nav { height: 100%; display: flex; align-items: center; gap: 36px; }
.brand-mark {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  color: var(--blue-800);
  font-size: 21px;
  font-weight: 760;
  letter-spacing: -0.035em;
  white-space: nowrap;
}
.brand-e {
  position: relative;
  display: inline-grid;
  place-items: center;
  width: 1.08em;
  height: 1.08em;
  margin: 0 0.08em;
  color: #fff;
  background: linear-gradient(145deg, var(--blue-500), var(--blue-700));
  border-radius: 56% 44% 49% 51% / 45% 53% 47% 55%;
  box-shadow: inset 0 -0.08em 0.16em rgba(2, 39, 95, 0.2), 0 0.14em 0.3em rgba(36, 121, 232, 0.18);
  font-size: 1.08em;
  font-weight: 800;
  font-style: normal;
  line-height: 1;
  letter-spacing: 0;
  transform: translateY(0.01em);
}
.brand-e::after {
  content: "";
  position: absolute;
  top: -0.14em;
  right: -0.08em;
  width: 0.28em;
  height: 0.28em;
  border: 2px solid var(--canvas);
  border-radius: 50%;
  background: var(--mint-500);
}
.nav-links { display: flex; align-items: center; gap: 30px; margin-left: auto; }
.nav-links a, .footer-links a { min-height: 44px; display: inline-flex; align-items: center; color: #455b78; font-size: 14px; font-weight: 650; }
.nav-links a:hover, .footer-links a:hover { color: var(--blue-700); }
.nav-download {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 20px;
  color: #fff;
  background: var(--blue-800);
  border-radius: 12px;
  font-size: 14px;
  font-weight: 720;
  box-shadow: 0 8px 22px rgba(18, 63, 132, 0.2);
  transition: transform 180ms ease, background 180ms ease;
}
.nav-download:hover { background: var(--blue-700); transform: translateY(-1px); }

.hero {
  position: relative;
  overflow: hidden;
  min-height: calc(100vh - 72px);
  display: grid;
  align-items: center;
  padding-top: clamp(60px, 6vw, 90px);
  background:
    radial-gradient(circle at 83% 32%, rgba(81, 155, 245, 0.17), transparent 28%),
    linear-gradient(145deg, #f9fcff 0%, #eef6ff 62%, #f4fbf8 100%);
  isolation: isolate;
}
.hero::after {
  content: "";
  position: absolute;
  z-index: -1;
  inset: auto 0 0;
  height: 120px;
  background: linear-gradient(to bottom, transparent, var(--canvas));
}
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.04fr) minmax(360px, 0.78fr); align-items: center; gap: clamp(56px, 7vw, 110px); }
.hero-copy { position: relative; z-index: 2; }
.hero-brand-line { display: flex; align-items: center; margin-bottom: 24px; color: var(--blue-800); font-size: 20px; font-weight: 720; }
.brand-mark--hero { min-height: auto; font-size: inherit; }
.hero-brand-tail { letter-spacing: 0.01em; }
.hero h1 { max-width: 720px; margin: 0; color: var(--blue-950); font-size: clamp(48px, 5.1vw, 78px); font-weight: 790; line-height: 1.08; letter-spacing: -0.06em; }
.hero h1 span { color: var(--blue-700); }
.hero-lede { max-width: 620px; margin: 28px 0 34px; color: #435a78; font-size: clamp(17px, 1.5vw, 20px); line-height: 1.85; }
.download-panel { scroll-margin-top: 96px; }
.download-label { margin: 0 0 12px; color: #667892; font-size: 13px; font-weight: 700; letter-spacing: 0.08em; }
.store-downloads { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; max-width: 650px; }
.store-button {
  --store-ink: #fff;
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  min-height: 54px;
  padding: 10px 13px;
  color: var(--store-ink);
  background: var(--store-color, var(--blue-900));
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 13px;
  box-shadow: 0 8px 22px color-mix(in srgb, var(--store-color, var(--blue-900)) 24%, transparent);
  font-size: 13px;
  font-weight: 720;
  line-height: 1.25;
  transition: transform 180ms ease, filter 180ms ease, box-shadow 180ms ease;
}
.store-button:hover { filter: saturate(1.06) brightness(1.04); transform: translateY(-2px); box-shadow: 0 12px 26px color-mix(in srgb, var(--store-color, var(--blue-900)) 30%, transparent); }
.store-button img { width: 25px; height: 25px; flex: 0 0 auto; }

.hero-product { position: relative; display: grid; place-items: center; min-width: 0; }
.device-frame {
  position: relative;
  z-index: 2;
  width: min(100%, 342px);
  margin: 0;
  padding: 10px;
  border: 2px solid #213149;
  border-radius: 47px;
  background: linear-gradient(145deg, #27384e, #0b1320 40%, #23334a);
  box-shadow: 0 44px 90px rgba(14, 54, 109, 0.26), inset 0 0 0 1px rgba(255,255,255,0.25);
  transform: rotate(2deg);
}
.device-screen { position: relative; overflow: hidden; aspect-ratio: 1320 / 2868; border-radius: 38px; background: #dfeaf7; }
.device-screen img { width: 100%; height: 100%; object-fit: cover; }
.device-speaker { position: absolute; z-index: 3; top: 18px; left: 50%; width: 29%; height: 25px; border-radius: 999px; background: #080d14; transform: translateX(-50%); }
.device-frame.is-image-missing .device-screen { background: linear-gradient(150deg, var(--blue-100), var(--mint-100)); }
.device-frame.is-image-missing img { visibility: hidden; }
.device-image-fallback { position: absolute; inset: 0; display: none; place-items: center; margin: 0; padding: 24px; color: var(--blue-900); background: linear-gradient(150deg, var(--blue-100), var(--mint-100)); text-align: center; font-size: 14px; font-weight: 750; }
.device-frame.is-image-missing .device-image-fallback { display: grid; }
.noscript-note { width: min(var(--page), 1180px); margin: 14px auto 0; padding: 12px 16px; color: #35516f; background: var(--blue-100); border: 1px solid var(--line); border-radius: 12px; font-size: 13px; }
.growth-note { position: absolute; z-index: 3; min-width: 164px; padding: 13px 16px; border: 1px solid rgba(255,255,255,0.8); border-radius: 16px; background: rgba(255,255,255,0.91); box-shadow: var(--shadow-card); -webkit-backdrop-filter: blur(12px); backdrop-filter: blur(12px); }
.growth-note span, .growth-note strong { display: block; }
.growth-note span { color: #71839b; font-size: 11px; font-weight: 700; letter-spacing: .08em; }
.growth-note strong { margin-top: 2px; color: var(--blue-800); font-size: 15px; }
/* Explain the two learning modes at their respective heights. The cards may overlap the bezel, but never the screen content. */
.growth-note--top { top: 12.5%; right: auto; left: calc(50% + 132px); }
.growth-note--bottom { top: 42.5%; right: calc(50% + 132px); bottom: auto; left: auto; }
.hero-orbit { position: absolute; z-index: -1; border: 1px solid rgba(36,121,232,.15); border-radius: 50%; }
.hero-orbit--one { top: 8%; right: -9%; width: 46vw; height: 46vw; }
.hero-orbit--two { right: 7%; bottom: -18%; width: 30vw; height: 30vw; }

.section-heading { max-width: 780px; margin-bottom: 48px; }
.section-heading--center { margin-inline: auto; text-align: center; }
.section-context { margin: 0 0 12px; color: var(--blue-700); font-size: 14px; font-weight: 760; }
.section-heading h2, .scenario-heading h2, .dock-copy h2, .support-heading h2 { margin: 0; color: var(--blue-950); font-size: clamp(34px, 4vw, 56px); line-height: 1.18; letter-spacing: -0.045em; }
.section-heading > p:last-child, .scenario-heading > p, .support-heading > p { max-width: 650px; margin: 18px 0 0; color: var(--muted); font-size: 18px; }

.capabilities { background: var(--canvas); }
.bento-grid { display: grid; grid-template-columns: repeat(12, 1fr); gap: 18px; }
.bento-card { position: relative; min-height: 350px; overflow: hidden; padding: 34px; border: 1px solid #d8e6f5; border-radius: 26px; background: var(--paper); box-shadow: var(--shadow-card); }
.bento-card--plan { grid-column: span 7; background: linear-gradient(145deg, #fff, #edf6ff); }
.bento-card--weakness { grid-column: span 5; background: linear-gradient(145deg, #0b2857, #0f4b96); border-color: transparent; }
.bento-card--growth { grid-column: 1 / -1; min-height: 290px; display: grid; grid-template-columns: .72fr 1.28fr; align-items: center; background: linear-gradient(110deg, #f0fbf7, #eff6ff 60%, #fff); }
.card-copy { position: relative; z-index: 2; max-width: 430px; }
.card-index { display: grid; place-items: center; width: 34px; height: 34px; margin-bottom: 54px; border: 1px solid #bdd7f4; border-radius: 50%; color: var(--blue-700); font-size: 13px; font-weight: 800; }
.card-copy h3 { margin: 0; color: var(--blue-950); font-size: 29px; line-height: 1.25; letter-spacing: -.025em; }
.card-copy p { max-width: 40ch; margin: 13px 0 0; color: var(--muted); }
.bento-card--weakness .card-index { color: #b9e7ff; border-color: rgba(185,231,255,.34); }
.bento-card--weakness h3 { color: #fff; }
.bento-card--weakness p { color: #d5e5f8; }
.plan-visual { position: absolute; right: 28px; bottom: 30px; left: 42%; display: flex; align-items: end; justify-content: space-between; gap: 10px; height: 185px; padding: 18px; border: 1px solid rgba(177,208,240,.7); border-radius: 20px; background: rgba(255,255,255,.75); }
.plan-day { display: grid; flex: 1; grid-template-rows: auto 1fr; gap: 10px; height: 100%; color: #71839b; font-size: 12px; text-align: center; }
.plan-day i { align-self: end; display: block; height: 36%; border-radius: 8px 8px 4px 4px; background: #d9e6f5; }
.plan-day--done i { height: 65%; background: #9fc6f5; }
.plan-day--current { color: var(--blue-800); font-weight: 800; }
.plan-day--current i { height: 92%; background: linear-gradient(var(--blue-500), var(--blue-700)); box-shadow: 0 8px 18px rgba(36,121,232,.25); }
.weakness-visual { position: absolute; right: 30px; bottom: 36px; left: 30px; display: flex; align-items: end; gap: 11px; height: 118px; }
.weakness-visual span { flex: 1; height: var(--level); border-radius: 8px 8px 3px 3px; background: rgba(151,202,255,.28); }
.weakness-visual .is-focus { background: var(--mint-500); box-shadow: 0 0 30px rgba(69,212,162,.45); }
.growth-visual { position: relative; height: 190px; margin-left: 40px; }
.growth-line { position: absolute; inset: 32px 25px 20px; border-top: 4px solid var(--blue-500); border-radius: 50%; transform: rotate(-8deg); }
.growth-line::after { content: ""; position: absolute; top: -8px; right: -4px; width: 12px; height: 12px; border-top: 4px solid var(--blue-500); border-right: 4px solid var(--blue-500); transform: rotate(39deg); }
.growth-point { position: absolute; width: 20px; height: 20px; border: 5px solid #fff; border-radius: 50%; background: var(--blue-600); box-shadow: 0 5px 15px rgba(36,121,232,.3); }
.growth-point--one { left: 17%; bottom: 32%; }
.growth-point--two { left: 49%; bottom: 49%; }
.growth-point--three { right: 13%; top: 21%; background: var(--mint-500); }
.growth-visual strong { position: absolute; right: 3%; top: 1%; color: var(--blue-800); font-size: 15px; }

.growth-loop { background: #fff; }
.loop-steps { position: relative; display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; margin: 70px 0 0; padding: 0; list-style: none; }
.loop-steps::before { content: ""; position: absolute; top: 27px; right: 12.5%; left: 12.5%; height: 2px; background: linear-gradient(90deg, var(--blue-200, #b9d8fa), var(--mint-500)); }
.loop-steps li { position: relative; z-index: 1; padding: 0 22px; text-align: center; }
.step-number { display: grid; place-items: center; width: 56px; height: 56px; margin: 0 auto 24px; border: 8px solid #fff; border-radius: 50%; color: #fff; background: var(--blue-700); box-shadow: 0 0 0 1px #c8ddf5, 0 8px 20px rgba(36,121,232,.18); font-size: 15px; font-weight: 800; }
.loop-steps li:last-child .step-number { color: var(--blue-950); background: var(--mint-500); }
.loop-steps h3 { margin: 0; color: var(--blue-950); font-size: 19px; }
.loop-steps p { margin: 8px 0 0; color: var(--muted); font-size: 14px; }

.scenario { color: #fff; background: radial-gradient(circle at 90% 5%, rgba(48,127,231,.28), transparent 28%), linear-gradient(145deg, #07162f, #0b2c5b 68%, #0c376b); }
.scenario-heading { display: grid; grid-template-columns: .9fr 1.1fr; align-items: end; gap: 80px; margin-bottom: 52px; }
.scenario-heading h2 { color: #fff; }
.scenario-heading .section-context { color: #8fc2ff; }
.scenario-heading > p { color: #c8d9ed; }
.scene-gallery { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 18px; align-items: start; }
.scenario-shot { position: relative; overflow: hidden; aspect-ratio: 1320 / 2868; margin: 0; border: 1px solid rgba(255,255,255,.22); border-radius: 29px; background: #173762; box-shadow: 0 24px 55px rgba(0,0,0,.28); }
.scenario-shot:nth-child(even) { margin-top: 34px; }
.scenario-shot img { width: 100%; height: 100%; object-fit: cover; }
.scenario-shot.is-image-missing::after { content: "图片暂不可用"; position: absolute; inset: 0; display: grid; place-items: center; color: #d5e5f8; }
.scenario-shot.is-image-missing img { visibility: hidden; }

.dock-tool { background: linear-gradient(180deg, #f5f9ff, #edf6ff); }
.dock-grid { display: grid; grid-template-columns: .9fr 1.1fr; align-items: center; gap: clamp(60px, 9vw, 130px); }
.dock-copy h2 { max-width: 620px; }
.dock-copy > p:not(.section-context) { max-width: 570px; margin: 22px 0 0; color: var(--muted); font-size: 18px; }
.dock-benefits { display: grid; gap: 15px; margin: 30px 0 0; padding: 0; list-style: none; color: #314b6c; font-weight: 650; }
.dock-benefits li { display: flex; align-items: center; gap: 13px; }
.dock-benefits li span { width: 9px; height: 9px; border: 2px solid var(--blue-600); border-radius: 50%; box-shadow: 6px -5px 0 -2px var(--mint-500); }
.dock-demo { position: relative; min-height: 460px; display: grid; place-items: center; padding: 48px; border: 1px solid #d1e2f5; border-radius: 34px; background: linear-gradient(145deg, #dfeeff, #f9fcff); box-shadow: var(--shadow-soft); }
.study-card { width: min(100%, 410px); min-height: 260px; padding: 34px; border: 1px solid #d4e2f0; border-radius: 22px; background: #fff; box-shadow: 0 24px 55px rgba(22,72,132,.16); transform: rotate(-2deg); }
.study-card-label { color: var(--blue-700); font-size: 12px; font-weight: 800; }
.study-card p { max-width: 18ch; margin: 38px 0 28px; color: var(--blue-950); font-size: 24px; font-weight: 740; line-height: 1.5; }
.study-card-line { width: 85%; height: 7px; border-radius: 99px; background: #d9e6f3; }
.study-card-line--short { width: 58%; margin-top: 12px; }
.tool-dock { position: absolute; right: 9%; bottom: 55px; left: 9%; display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; padding: 9px; border: 1px solid rgba(255,255,255,.8); border-radius: 18px; background: rgba(10,38,82,.93); box-shadow: 0 18px 42px rgba(7,29,66,.3); }
.tool-dock span { min-height: 44px; display: grid; place-items: center; color: #e8f2ff; border-radius: 11px; background: rgba(255,255,255,.09); font-size: 14px; font-weight: 700; }
.tool-dock span:last-child { color: var(--blue-950); background: var(--mint-500); }
.dock-hint { position: absolute; right: 0; bottom: -38px; left: 0; margin: 0; color: #667b96; font-size: 13px; text-align: center; }

.support { background: #fff; }
.support-heading { display: grid; grid-template-columns: 1.1fr .9fr; align-items: end; gap: 70px; margin-bottom: 48px; }
.support-grid { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(330px, .65fr); gap: 28px; align-items: start; }
.faq-list { border-top: 1px solid var(--line); }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list summary { position: relative; min-height: 70px; display: flex; align-items: center; padding: 19px 52px 19px 2px; color: var(--blue-950); cursor: pointer; font-size: 17px; font-weight: 720; list-style: none; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { content: "+"; position: absolute; right: 10px; width: 32px; height: 32px; display: grid; place-items: center; border-radius: 50%; color: var(--blue-700); background: var(--blue-50); font-size: 22px; font-weight: 500; transition: transform 180ms ease, background 180ms ease; }
.faq-list details[open] summary::after { color: #fff; background: var(--blue-700); transform: rotate(45deg); }
.faq-list details p { max-width: 68ch; margin: -2px 50px 22px 2px; color: var(--muted); }
.contact-card { padding: 28px; color: #d9e8f9; border-radius: 26px; background: var(--blue-950); box-shadow: var(--shadow-soft); }
.contact-label { display: block; margin-bottom: 5px; color: #94b6dd; font-size: 12px; font-weight: 760; }
.contact-email a { min-height: 44px; display: inline-flex; align-items: center; color: #fff; font-size: 18px; font-weight: 720; word-break: break-all; }
.contact-email p { margin: 4px 0 0; color: #b9cee6; font-size: 14px; }
.wechat-block { display: grid; grid-template-columns: 116px 1fr; align-items: center; gap: 20px; margin-top: 26px; padding-top: 26px; border-top: 1px solid rgba(255,255,255,.13); }
.qr-frame { position: relative; overflow: hidden; aspect-ratio: 1; padding: 7px; border-radius: 15px; background: #fff; }
.qr-frame img { width: 100%; height: 100%; object-fit: contain; }
.qr-fallback { display: none; color: var(--blue-950); font-size: 11px; line-height: 1.4; text-align: center; }
.qr-frame.is-image-missing { display: grid; place-items: center; }
.qr-frame.is-image-missing img { display: none; }
.qr-frame.is-image-missing .qr-fallback { display: block; }
.wechat-block p { margin: 0; color: #fff; font-size: 15px; font-weight: 650; }
.security-note { margin: 24px 0 0; padding: 13px 15px; color: #d7e7f7; border: 1px solid rgba(105,213,177,.28); border-radius: 12px; background: rgba(69,212,162,.09); font-size: 13px; }
.contact-legal { display: flex; gap: 20px; margin-top: 18px; }
.contact-legal a { min-height: 44px; display: inline-flex; align-items: center; color: #a9cfff; font-size: 14px; text-decoration: underline; text-underline-offset: 4px; }

.site-footer { color: #b8cae0; background: #06162f; }
.footer-main { display: flex; justify-content: space-between; gap: 60px; padding-top: 54px; padding-bottom: 38px; }
.brand-mark--footer { color: #e8f2ff; }
.brand-mark--footer .brand-e::after { border-color: #06162f; }
.footer-main p { margin: 8px 0 0; color: #829ab7; font-size: 14px; }
.footer-links { display: flex; flex-wrap: wrap; align-items: start; justify-content: flex-end; gap: 8px 26px; }
.footer-links a { color: #a9bdd4; }
.footer-meta { min-height: 70px; display: flex; align-items: center; justify-content: space-between; gap: 30px; border-top: 1px solid rgba(255,255,255,.1); color: #758ca8; font-size: 13px; }
.footer-meta a { min-height: 44px; display: inline-flex; align-items: center; }

.legal-page { min-height: 100vh; background: #f4f8fd; }
.legal-header { height: 72px; border-bottom: 1px solid var(--line); background: rgba(255,255,255,.9); }
.legal-nav { height: 100%; display: flex; align-items: center; justify-content: space-between; }
.legal-back { min-height: 44px; display: inline-flex; align-items: center; color: var(--blue-700); font-weight: 700; }
.legal-shell { width: min(820px, calc(100% - 40px)); margin: 0 auto; padding: 70px 0 100px; }
.legal-title { margin: 0; color: var(--blue-950); font-size: clamp(34px, 5vw, 52px); line-height: 1.2; }
.legal-updated { margin: 12px 0 36px; color: #70829a; font-size: 14px; }
.legal-status { padding: 28px; border: 1px solid var(--line); border-radius: 16px; color: var(--muted); background: #fff; }
.legal-status[data-state="error"] { color: #9a2038; border-color: #f1cbd4; background: #fff7f8; }
.legal-content { color: #2d425f; line-height: 1.9; }
.legal-content h2, .legal-content h3 { margin: 2em 0 .7em; color: var(--blue-950); line-height: 1.4; }
.legal-content a { color: var(--blue-700); text-decoration: underline; text-underline-offset: 3px; }
.legal-content img { height: auto; }
.legal-content table { display: block; max-width: 100%; overflow: auto; border-collapse: collapse; }
.legal-content td, .legal-content th { min-width: 120px; padding: 8px 10px; border: 1px solid var(--line); }

@media (max-width: 1200px) {
  :root { --page: min(1060px, calc(100% - 44px)); }
  .hero-grid { grid-template-columns: minmax(0, 1fr) minmax(320px, .72fr); gap: 48px; }
  .store-downloads { grid-template-columns: repeat(2, minmax(0, 1fr)); max-width: 520px; }
  .device-frame { width: 315px; }
  .growth-note--top { left: calc(50% + 122px); }
  .growth-note--bottom { right: calc(50% + 122px); }
}

@media (max-width: 1024px) {
  .nav-links { gap: 20px; }
  .nav-links a:nth-child(3) { display: none; }
  .hero h1 { font-size: clamp(46px, 6.2vw, 66px); }
  .bento-card--plan, .bento-card--weakness { grid-column: span 6; }
  .plan-visual { left: 34%; }
  .scene-gallery { gap: 13px; }
  .scenario-shot { border-radius: 23px; }
  .support-grid { grid-template-columns: minmax(0, 1.1fr) minmax(310px, .9fr); }
}

@media (max-width: 900px) {
  :root { --page: min(760px, calc(100% - 40px)); }
  .site-header { height: 66px; }
  .nav-links { display: none; }
  .nav-download { margin-left: auto; }
  .hero { min-height: auto; }
  .hero-grid { grid-template-columns: 1fr; gap: 76px; }
  .hero-copy { text-align: center; }
  .hero-brand-line { justify-content: center; }
  .hero-lede, .store-downloads { margin-inline: auto; }
  .download-label { text-align: left; }
  .hero-product { width: min(100%, 500px); margin-inline: auto; }
  .device-frame { width: min(72vw, 340px); transform: rotate(1.5deg); }
  .growth-note--top { left: calc(50% + 132px); }
  .growth-note--bottom { right: calc(50% + 132px); }
  .bento-card--plan, .bento-card--weakness, .bento-card--growth { grid-column: 1 / -1; }
  .bento-card--growth { grid-template-columns: .8fr 1.2fr; }
  .loop-steps { grid-template-columns: repeat(2, 1fr); gap: 38px 0; }
  .loop-steps::before { display: none; }
  .scenario-heading, .support-heading { grid-template-columns: 1fr; gap: 16px; }
  .scene-gallery { grid-template-columns: repeat(4, minmax(190px, 1fr)); overflow-x: auto; margin-inline: -20px; padding: 4px 20px 28px; scroll-snap-type: x mandatory; scrollbar-width: thin; }
  .scenario-shot { scroll-snap-align: start; }
  .dock-grid { grid-template-columns: 1fr; }
  .dock-demo { width: min(100%, 620px); margin-inline: auto; }
  .support-grid { grid-template-columns: 1fr; }
  .contact-card { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
  .wechat-block { margin: 0; padding: 0 0 0 22px; border-top: 0; border-left: 1px solid rgba(255,255,255,.13); }
  .security-note, .contact-legal { grid-column: 1 / -1; }
}

@media (max-width: 768px) {
  .section-pad { padding: 76px 0; }
  .hero { padding-top: 52px; }
  .hero h1 { font-size: clamp(42px, 10vw, 62px); }
  .hero-lede { font-size: 17px; }
  .bento-card { min-height: 320px; padding: 28px; }
  .card-index { margin-bottom: 40px; }
  .bento-card--growth { display: block; min-height: 440px; }
  .growth-visual { height: 165px; margin: 45px 0 0; }
  .scenario-shot:nth-child(even) { margin-top: 22px; }
  .footer-main { display: grid; }
  .footer-links { justify-content: flex-start; }
}

@media (max-width: 600px) {
  :root { --page: calc(100% - 32px); }
  .brand-mark { font-size: 19px; }
  .nav-download { padding: 0 15px; }
  .hero-brand-line { font-size: 17px; }
  .hero h1 { font-size: clamp(40px, 11.7vw, 55px); letter-spacing: -.055em; }
  .hero h1 br { display: none; }
  .hero-lede { margin-top: 22px; }
  .store-downloads { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
  .store-button { min-height: 58px; padding: 9px 10px; font-size: 12px; }
  .store-button img { width: 23px; height: 23px; }
  .hero-product { margin-top: -10px; }
  .device-frame { width: min(79vw, 320px); }
  .growth-note { min-width: 138px; padding: 10px 12px; }
  .growth-note strong { font-size: 13px; }
  .growth-note { display: none; }
  .section-heading h2, .scenario-heading h2, .dock-copy h2, .support-heading h2 { font-size: 36px; }
  .section-heading > p:last-child, .scenario-heading > p, .support-heading > p, .dock-copy > p:not(.section-context) { font-size: 16px; }
  .bento-grid { gap: 14px; }
  .bento-card { border-radius: 21px; }
  .plan-visual { right: 20px; bottom: 24px; left: 20px; height: 125px; }
  .weakness-visual { height: 90px; }
  .loop-steps { grid-template-columns: 1fr; gap: 30px; }
  .loop-steps li { display: grid; grid-template-columns: 56px 1fr; align-items: center; gap: 18px; padding: 0; text-align: left; }
  .step-number { margin: 0; }
  .scene-gallery { grid-template-columns: repeat(4, minmax(70vw, 1fr)); margin-inline: -16px; padding-inline: 16px; }
  .scenario-shot { border-radius: 27px; }
  .dock-demo { min-height: 400px; padding: 30px 20px; border-radius: 25px; }
  .study-card { min-height: 230px; padding: 27px; }
  .study-card p { margin-top: 30px; font-size: 21px; }
  .tool-dock { right: 5%; bottom: 46px; left: 5%; }
  .support-heading { margin-bottom: 32px; }
  .contact-card { display: block; padding: 24px; border-radius: 21px; }
  .wechat-block { margin-top: 24px; padding: 24px 0 0; border-top: 1px solid rgba(255,255,255,.13); border-left: 0; }
  .security-note { margin-top: 22px; }
  .footer-main { gap: 30px; }
  .footer-links { display: grid; grid-template-columns: repeat(2, 1fr); }
  .footer-meta { align-items: flex-start; flex-direction: column; justify-content: center; gap: 0; padding-block: 14px; }
}

@media (max-width: 390px) {
  :root { --page: calc(100% - 28px); }
  .nav-download { padding-inline: 12px; font-size: 13px; }
  .hero-brand-line { font-size: 16px; }
  .hero h1 { font-size: 39px; }
  .store-downloads { grid-template-columns: 1fr; }
  .store-button { justify-content: center; font-size: 13px; }
  .device-frame { width: 84vw; }
  .scene-gallery { margin-inline: -14px; padding-inline: 14px; }
  .section-heading h2, .scenario-heading h2, .dock-copy h2, .support-heading h2 { font-size: 32px; }
  .bento-card { padding: 24px; }
  .wechat-block { grid-template-columns: 104px 1fr; gap: 15px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; }
}

.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}