@font-face {
  font-family: "Inter Variable";
  src: url("assets/fonts/inter-latin.woff2") format("woff2");
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
}

:root {
  --brand-ink: #1c2129;
  --brand-beige: #f4f1ed;
  --brand-amber: #ffaa5a;
  --brand-bronze: #c49557;
  --brand-bronze-text: #765326;
  --brand-moss: #6a8372;
  --brand-graphite: #5a5a5a;
  --brand-rosewood: #a65a5a;
  --white: #ffffff;
  --line-dark: rgba(28, 33, 41, 0.09);
  --line-light: rgba(255, 255, 255, 0.11);
  --shadow-soft: 0 24px 80px rgba(28, 33, 41, 0.09);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--brand-beige);
  color: var(--brand-ink);
  font-family: "Inter Variable", Inter, -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  letter-spacing: -0.022em;
  -webkit-font-smoothing: antialiased;
}

body.menu-open { overflow: hidden; }

button,
a { -webkit-tap-highlight-color: transparent; }

button { font: inherit; }

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

img,
video { max-width: 100%; }

.skip-link {
  position: fixed;
  z-index: 200;
  top: 8px;
  left: 12px;
  padding: 10px 14px;
  border-radius: 12px;
  background: var(--brand-ink);
  color: white;
  font-size: 14px;
  font-weight: 700;
  transform: translateY(-160%);
  transition: transform .2s ease;
}

.skip-link:focus { transform: translateY(0); }

.shell {
  width: min(1100px, calc(100% - 48px));
  margin-inline: auto;
}

.section-space { padding-block: 124px; }

.site-header {
  position: fixed;
  z-index: 80;
  top: 0;
  left: 0;
  width: 100%;
  height: 48px;
  border-bottom: 1px solid rgba(28, 33, 41, 0.08);
  background: rgba(244, 241, 237, 0.72);
  backdrop-filter: saturate(180%) blur(20px);
}

.header-inner {
  width: min(1024px, calc(100% - 48px));
  height: 100%;
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-link,
.icon-button {
  display: grid;
  place-items: center;
  transition: opacity 0.25s ease;
}

.brand-link:hover,
.icon-button:hover { opacity: 0.5; }

.brand-link { width: 44px; height: 44px; }
.brand-link img { width: 28px; height: 28px; object-fit: contain; }

.header-actions { display: flex; align-items: center; gap: 24px; }

.icon-button {
  width: 44px;
  height: 44px;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--brand-ink);
  cursor: pointer;
}

.icon-button svg,
.menu-close svg,
.wechat-copy svg,
.qr-button > svg {
  width: 100%;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.contact-icon svg { width: 16px; }
.menu-icon svg { width: 20px; }

.menu-overlay {
  position: fixed;
  z-index: 100;
  inset: 0;
  visibility: hidden;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.35s ease, visibility 0.35s ease;
}

.menu-overlay.open {
  visibility: visible;
  opacity: 1;
  pointer-events: auto;
}

.menu-backdrop {
  position: absolute;
  inset: 0;
  width: 100%;
  border: 0;
  background: rgba(28, 33, 41, 0.16);
  backdrop-filter: blur(8px);
  cursor: pointer;
}

.menu-panel {
  position: relative;
  z-index: 1;
  width: min(420px, 100%);
  height: 100%;
  margin-left: auto;
  overflow: auto;
  background: var(--brand-beige);
  transform: translateX(100%);
  transition: transform 0.45s cubic-bezier(0.22, 1, 0.36, 1);
}

.menu-overlay.open .menu-panel { transform: translateX(0); }

.menu-close {
  position: absolute;
  z-index: 2;
  top: 22px;
  right: 22px;
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  padding: 11px;
  border: 1px solid var(--line-dark);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.5);
  color: var(--brand-ink);
  cursor: pointer;
}

.menu-content {
  min-height: 100%;
  padding: 70px 48px 42px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.menu-label,
.eyebrow,
.offer-label,
.video-index,
.workflow-card > span {
  margin: 0;
  color: var(--brand-bronze-text);
  font-size: 11px;
  font-weight: 750;
  letter-spacing: 0.2em;
  line-height: 1.3;
  text-transform: uppercase;
}

.menu-links { display: flex; flex-direction: column; }

.menu-links a {
  position: relative;
  padding: 13px 0;
  border-bottom: 1px solid var(--line-dark);
  font-size: 26px;
  font-weight: 700;
  transition: color 0.25s ease, padding-left 0.25s ease;
}

.menu-links a:hover { color: var(--brand-bronze); padding-left: 10px; }

.menu-links a.active { color: var(--brand-bronze); padding-left: 18px; }
.menu-links a.active::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--brand-amber);
  transform: translateY(-50%);
}

.menu-divider { height: 1px; margin-bottom: 26px; background: var(--line-dark); }
.menu-footer p { margin: 0 0 26px; color: var(--brand-graphite); font-size: 19px; line-height: 1.35; }
.menu-footer p strong { color: var(--brand-ink); }
.menu-footer a { display: flex; align-items: center; justify-content: space-between; padding: 14px 16px; background: var(--brand-amber); border-radius: 16px; font-size: 14px; font-weight: 750; }
.menu-footer small { display: block; margin-top: 22px; color: rgba(28,33,41,.45); font-size: 9px; font-weight: 700; letter-spacing: .18em; text-transform: uppercase; }

.hero {
  min-height: 760px;
  padding-top: 148px;
  padding-bottom: 106px;
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(310px, .65fr);
  align-items: center;
  gap: 74px;
}

.hero h1,
.proof-head h2,
.section-intro h2,
.partnership-head h2,
.control-panel h2,
.site-footer h2 {
  margin: 0;
  font-size: clamp(48px, 6vw, 76px);
  font-weight: 800;
  letter-spacing: -0.055em;
  line-height: 1.04;
  text-wrap: balance;
}

.hero h1 { margin-top: 25px; }
.hero h1 span { color: rgba(28, 33, 41, 0.23); }

.hero-en {
  margin: 28px 0 0;
  color: var(--brand-bronze-text);
  font-size: 18px;
  font-weight: 650;
  line-height: 1.35;
}

.hero-lead {
  max-width: 690px;
  margin: 23px 0 0;
  color: rgba(28, 33, 41, 0.64);
  font-size: 18px;
  font-weight: 390;
  line-height: 1.72;
}

.mobile-offer { display: none; }

.hero-actions { margin-top: 40px; display: flex; align-items: center; flex-wrap: wrap; gap: 26px; }

.pill-button {
  min-height: 54px;
  padding: 0 32px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 980px;
  font-size: 16px;
  font-weight: 650;
  transition: transform .35s cubic-bezier(.4,0,.2,1), background .35s ease, box-shadow .35s ease;
}

.pill-button:hover { transform: scale(1.02); box-shadow: 0 10px 20px rgba(0,0,0,.1); }
.pill-button.primary { background: var(--brand-ink); color: white; }
.pill-button.primary:hover { background: #000; }
.pill-button.inverse { background: white; color: var(--brand-ink); }

.text-link { font-size: 16px; font-weight: 700; }
.text-link span { display: inline-block; margin-left: 7px; color: var(--brand-bronze); transition: transform .25s ease; }
.text-link:hover span { transform: translateX(5px); }

.offer-summary {
  min-height: 430px;
  padding: 37px;
  display: flex;
  flex-direction: column;
  border: 1px solid rgba(28,33,41,.06);
  border-radius: 40px;
  background: white;
  box-shadow: var(--shadow-soft);
}

.offer-price { margin: auto 0 16px; font-size: clamp(66px, 6vw, 92px); font-weight: 790; letter-spacing: -.075em; line-height: .9; }
.offer-price > span { margin-right: 4px; color: var(--brand-amber); font-size: .43em; vertical-align: top; }
.offer-price small { display: block; margin: 18px 0 0 6px; color: var(--brand-graphite); font-size: 13px; font-weight: 700; letter-spacing: .13em; text-transform: uppercase; }
.offer-output { margin: 0 0 26px; color: var(--brand-graphite); font-size: 15px; line-height: 1.55; }
.offer-output strong { color: var(--brand-ink); }

.offer-note {
  margin: -10px 0 22px;
  color: rgba(28, 33, 41, .64);
  font-size: 12px;
  line-height: 1.55;
}

.offer-path { display: flex; align-items: center; justify-content: space-between; gap: 8px; padding-top: 20px; border-top: 1px solid var(--line-dark); }
.offer-path span { font-size: 10px; font-weight: 750; white-space: nowrap; }
.offer-path i { color: var(--brand-bronze); font-size: 12px; font-style: normal; }

.pain-section { padding: 0 0 124px; }
.pain-heading { max-width: 780px; }
.pain-heading h2 { margin: 22px 0 0; font-size: clamp(40px, 5vw, 62px); font-weight: 800; letter-spacing: -.052em; line-height: 1.06; }
.pain-heading > p:last-child { max-width: 610px; margin: 24px 0 0; color: rgba(28,33,41,.58); font-size: 17px; line-height: 1.7; }
.pain-grid { margin-top: 52px; display: grid; grid-template-columns: repeat(3, 1fr); border: 1px solid var(--line-dark); border-radius: 34px; overflow: hidden; background: rgba(255,255,255,.28); }
.pain-card { min-height: 230px; padding: 30px; display: flex; flex-direction: column; }
.pain-card + .pain-card { border-left: 1px solid var(--line-dark); }
.pain-card > span { color: var(--brand-bronze-text); font-size: 11px; font-weight: 750; letter-spacing: .16em; }
.pain-card h3 { margin: auto 0 12px; font-size: 23px; letter-spacing: -.035em; }
.pain-card p { margin: 0; color: rgba(28,33,41,.56); font-size: 14px; line-height: 1.65; }

.proof-wrap { padding: 0 16px 112px; }

.proof-section {
  position: relative;
  width: min(1180px, 100%);
  margin-inline: auto;
  overflow: hidden;
  padding: 64px 48px 40px;
  border-radius: 44px;
  background: var(--brand-ink);
  color: white;
  box-shadow: 0 34px 100px rgba(28,33,41,.18);
}

.proof-section::before,
.proof-section::after {
  content: "";
  position: absolute;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  filter: blur(110px);
  pointer-events: none;
}

.proof-section::before { top: -250px; right: -120px; background: rgba(255,170,90,.12); }
.proof-section::after { bottom: -300px; left: -120px; background: rgba(106,131,114,.1); }

.proof-head,
.video-toolbar,
.video-grid,
.proof-note { position: relative; z-index: 1; }

.proof-head {
  max-width: 1000px;
  margin: 0 auto 30px;
  display: grid;
  grid-template-columns: 1.3fr .7fr;
  gap: 48px;
  align-items: end;
}

.eyebrow.light { color: var(--brand-amber); }
.proof-head h2 { margin-top: 22px; color: white; font-size: clamp(42px, 5.4vw, 68px); }
.proof-head > p { margin: 0 0 5px; color: rgba(255,255,255,.53); font-size: 17px; line-height: 1.65; }

.video-toolbar {
  width: min(900px, 100%);
  margin: 0 auto 12px;
  display: flex;
  align-items: center;
  justify-content: flex-end;
}

.video-pagination { display: none; }
.video-pagination button {
  width: 32px;
  height: 32px;
  padding: 0;
  display: grid;
  place-items: center;
  border: 0;
  background: transparent;
  cursor: pointer;
}
.video-pagination button::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: rgba(255,255,255,.24);
  transition: width .2s ease, background .2s ease;
}
.video-pagination button[aria-current="true"]::before { width: 22px; background: var(--brand-amber); }

.sync-button {
  width: 42px;
  height: 42px;
  padding: 0;
  display: grid;
  place-items: center;
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 14px;
  background: rgba(255,255,255,.06);
  color: rgba(255,255,255,.9);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.06), 0 10px 30px rgba(0,0,0,.08);
  backdrop-filter: blur(16px);
  cursor: pointer;
  transition: background .2s ease, border-color .2s ease, color .2s ease;
}

.sync-button:hover { border-color: rgba(255,255,255,.22); background: rgba(255,255,255,.11); }
.sync-button.is-playing { border-color: rgba(255,170,90,.55); background: rgba(255,170,90,.09); color: var(--brand-amber); }
.sync-button svg { grid-area: 1 / 1; width: 18px; height: 18px; }
.sync-play-icon { margin-left: 2px; fill: currentColor; stroke: none; }
.sync-pause-icon { display: none; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; }
.sync-button.is-playing .sync-play-icon { display: none; }
.sync-button.is-playing .sync-pause-icon { display: block; }
.playback-status { margin: 0; color: rgba(255,255,255,.48); font-size: 11px; line-height: 1.5; text-align: right; }

.sr-only {
  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;
}

.video-grid { width: min(900px, 100%); margin-inline: auto; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }

.video-card {
  overflow: hidden;
  border: 1px solid var(--line-light);
  border-radius: 25px;
  background: rgba(255,255,255,.04);
  backdrop-filter: blur(20px);
  transition: transform .4s ease, background .4s ease, border-color .4s ease;
}

@media (hover: hover) and (pointer: fine) {
  .video-card:hover { transform: translateY(-4px); background: rgba(255,255,255,.07); border-color: rgba(255,170,90,.6); }
}

.video-frame { position: relative; aspect-ratio: 9 / 16; overflow: hidden; background: #11151a; }
.video-frame video { width: 100%; height: 100%; display: block; object-fit: cover; background: #11151a; }
.video-cover { position: absolute; z-index: 2; inset: 0; width: 100%; height: 100%; padding: 0; overflow: hidden; border: 0; background: transparent; color: white; cursor: pointer; text-align: left; }
.cover-visual { position: absolute; inset: 0; display: block; transition: opacity .25s ease; }
.cover-visual img { width: 100%; height: 100%; display: block; object-fit: cover; }
.cover-shade { position: absolute; inset: 0; background: linear-gradient(180deg, rgba(14,17,21,.12) 16%, rgba(14,17,21,.42) 54%, rgba(14,17,21,.95) 100%); }
.cover-copy { position: absolute; left: 22px; right: 22px; bottom: 77px; display: flex; flex-direction: column; gap: 13px; }
.cover-copy small { color: var(--brand-amber); font-size: 10px; font-weight: 780; letter-spacing: .14em; text-transform: uppercase; }
.cover-copy strong { font-size: clamp(24px, 2.35vw, 32px); font-weight: 780; letter-spacing: -.045em; line-height: 1.06; }
.cover-action { position: absolute; left: 20px; bottom: 20px; min-height: 42px; padding: 0 15px 0 11px; display: inline-flex; align-items: center; gap: 8px; border: 1px solid rgba(255,255,255,.28); border-radius: 999px; background: rgba(28,33,41,.72); backdrop-filter: blur(12px); color: white; font-size: 10px; font-weight: 720; letter-spacing: .04em; transition: opacity .2s ease, background .2s ease; }
.cover-action svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.cover-play-icon { padding-left: 1px; }
.cover-pause-icon,
.cover-pause-label { display: none; }
.video-frame.is-playing .cover-visual { opacity: 0; }
.video-frame.is-playing .cover-action { opacity: 0; }
.video-frame.is-playing .cover-play-icon,
.video-frame.is-playing .cover-play-label { display: none; }
.video-frame.is-playing .cover-pause-icon,
.video-frame.is-playing .cover-pause-label { display: inline; }
.video-frame.is-playing .video-cover:hover .cover-action,
.video-frame.is-playing .video-cover:focus-visible .cover-action { opacity: 1; background: rgba(28,33,41,.86); }
.video-foot { min-height: 66px; margin: 0; padding: 14px 17px 15px; display: flex; flex-direction: column; justify-content: center; gap: 3px; }
.video-foot strong { color: white; font-size: 12px; }
.video-foot span { color: rgba(255,255,255,.43); font-size: 10px; letter-spacing: .02em; }
.proof-note { margin: 28px 0 0; color: rgba(255,255,255,.58); font-size: 11px; letter-spacing: .03em; text-align: center; }

.decision { display: grid; grid-template-columns: .78fr 1.22fr; gap: 90px; align-items: start; }
.section-intro { position: sticky; top: 110px; }
.section-intro h2 { margin-top: 24px; font-size: clamp(42px, 5.1vw, 64px); }
.section-intro > p:last-child { margin: 28px 0 0; color: rgba(28,33,41,.56); font-size: 17px; line-height: 1.7; }

.decision-table { border-top: 1px solid var(--line-dark); }
.decision-row { min-height: 132px; display: grid; grid-template-columns: 42px 1fr; align-items: start; gap: 18px; border-bottom: 1px solid var(--line-dark); }
.row-number { color: var(--brand-bronze-text); font-size: 11px; font-weight: 750; letter-spacing: .12em; }
.decision-row > .row-number { padding-top: 39px; }
.decision-row > div { padding: 32px 0; }
.decision-row strong { display: block; font-size: 19px; line-height: 1.4; }
.decision-row p { max-width: 600px; margin: 10px 0 0; color: rgba(28,33,41,.53); font-size: 14px; line-height: 1.65; }

.partnership { padding: 116px 24px 128px; background: white; }
.partnership .shell { width: min(1100px, 100%); }
.partnership-head { max-width: 880px; }
.partnership-head h2 { margin-top: 25px; font-size: clamp(45px, 5.7vw, 72px); }
.partnership-head > p:last-child { max-width: 600px; margin: 27px 0 0; color: rgba(28,33,41,.55); font-size: 18px; line-height: 1.65; }

.workflow-grid { margin-top: 74px; display: grid; grid-template-columns: 1fr 1fr; border: 1px solid var(--line-dark); border-radius: 40px; overflow: hidden; }
.workflow-card { min-height: 270px; padding: 36px; display: flex; flex-direction: column; }
.workflow-card:nth-child(even) { border-left: 1px solid var(--line-dark); }
.workflow-card:nth-child(n+3) { border-top: 1px solid var(--line-dark); }
.workflow-card h3 { margin: auto 0 13px; font-size: 27px; letter-spacing: -.04em; }
.workflow-card p { max-width: 390px; margin: 0; color: rgba(28,33,41,.55); font-size: 15px; line-height: 1.65; }

.pricing-card { overflow: hidden; display: grid; grid-template-columns: .92fr 1.08fr; border-radius: 52px; background: var(--brand-ink); color: white; box-shadow: 0 32px 90px rgba(28,33,41,.15); }
.pricing-main { min-height: 600px; padding: 54px; display: flex; flex-direction: column; border-right: 1px solid var(--line-light); }
.price-lockup { margin: auto 0 25px; font-size: clamp(82px, 9vw, 124px); font-weight: 790; letter-spacing: -.078em; line-height: .82; }
.price-lockup > span { margin-right: 7px; color: var(--brand-amber); font-size: .38em; vertical-align: top; }
.price-lockup small { display: block; margin: 22px 0 0 7px; color: rgba(255,255,255,.5); font-size: 13px; font-weight: 700; letter-spacing: .13em; text-transform: uppercase; }
.pricing-main h2 { margin: 0; font-size: 27px; letter-spacing: -.04em; }
.pricing-main > p { margin: 14px 0 30px; color: rgba(255,255,255,.5); line-height: 1.6; }
.pricing-main .pill-button { align-self: flex-start; }

.pricing-scope { padding: 54px; }
.pricing-scope h3 { margin: 0 0 34px; font-size: 30px; }
.scope-groups { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.scope-group h4 { min-height: 34px; margin: 0 0 8px; color: var(--brand-amber); font-size: 11px; font-weight: 760; letter-spacing: .08em; line-height: 1.45; }
.pricing-scope ul { margin: 0; padding: 0; list-style: none; }
.pricing-scope li { position: relative; padding: 15px 0 15px 24px; border-top: 1px solid var(--line-light); color: rgba(255,255,255,.7); font-size: 13px; line-height: 1.5; }
.pricing-scope li strong { color: white; font-weight: 720; }
.pricing-scope li::before { content: ""; position: absolute; left: 2px; top: 21px; width: 7px; height: 7px; border-radius: 50%; background: var(--brand-amber); }
.scope-separate { margin-top: 32px; padding-top: 8px; border-top: 1px solid var(--line-light); }
.scope-separate p { display: grid; grid-template-columns: 100px 1fr; gap: 16px; margin: 0; padding: 20px 0 0; font-size: 13px; line-height: 1.55; }
.scope-separate strong { color: var(--brand-amber); }
.scope-separate span { color: rgba(255,255,255,.6); }

.human-control { padding-bottom: 124px; }
.control-panel { padding: 64px; display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: 80px; border: 1px solid rgba(106,131,114,.18); border-radius: 48px; background: rgba(106,131,114,.12); }
.control-panel h2 { margin-top: 24px; font-size: clamp(39px, 4.4vw, 58px); }
.control-panel ul { margin: 0; padding: 0; list-style: none; }
.control-panel li { position: relative; padding: 18px 0 18px 34px; border-bottom: 1px solid rgba(28,33,41,.1); font-size: 16px; line-height: 1.5; }
.control-panel li:first-child { border-top: 1px solid rgba(28,33,41,.1); }
.control-panel li::before { content: "✓"; position: absolute; left: 2px; color: var(--brand-moss); font-weight: 800; }

.site-footer { padding: 128px 24px 50px; border-top: 1px solid #eee; background: white; text-align: center; }
.footer-inner { max-width: 900px; margin-inline: auto; display: flex; flex-direction: column; align-items: center; }
.site-footer h2 { font-size: clamp(40px, 5.5vw, 64px); font-style: italic; }
.footer-invite { margin: 45px 0 34px; display: flex; flex-direction: column; align-items: center; }
.footer-invite p { margin: 0; color: var(--brand-bronze-text); font-size: 17px; font-weight: 550; letter-spacing: .16em; text-transform: uppercase; }
.footer-invite span { width: 32px; height: 1px; margin-top: 17px; background: var(--brand-bronze); opacity: .3; }
.contact-actions { display: flex; align-items: center; justify-content: center; gap: 14px; }
.wechat-copy,
.qr-button { position: relative; height: 50px; border: 1px solid rgba(28,33,41,.05); background: #f8f8f8; color: var(--brand-ink); box-shadow: 0 4px 15px rgba(28,33,41,.05); cursor: pointer; transition: transform .25s ease, background .25s ease; }
.wechat-copy:hover,
.qr-button:hover { transform: scale(1.03); background: #f2f2f2; }
.wechat-copy { padding: 0 20px; display: flex; align-items: center; gap: 12px; border-radius: 16px; }
.wechat-copy span { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 15px; }
.wechat-copy svg { width: 16px; color: var(--brand-bronze); opacity: .55; }
.wechat-copy em { position: absolute; left: 50%; top: -43px; padding: 6px 9px; border-radius: 999px; background: var(--brand-amber); opacity: 0; transform: translate(-50%, 8px); pointer-events: none; font-size: 9px; font-style: normal; font-weight: 800; letter-spacing: .08em; transition: .25s ease; }
.wechat-copy.copied em { opacity: 1; transform: translate(-50%, 0); }
.qr-button { width: 50px; display: grid; place-items: center; border-radius: 16px; background: var(--brand-bronze); color: white; }
.qr-button > svg { width: 23px; }

.qr-popover { position: absolute; left: 50%; bottom: calc(100% + 14px); width: 176px; padding: 13px; border-radius: 24px; background: white; box-shadow: 0 25px 50px -12px rgba(0,0,0,.3); visibility: hidden; opacity: 0; transform: translate(-50%, 10px); pointer-events: none; transition: .3s ease; }
.qr-popover::after { content: ""; position: absolute; top: 100%; left: 50%; margin-left: -7px; border: 7px solid transparent; border-top-color: white; }
.qr-button.open .qr-popover { visibility: visible; opacity: 1; transform: translate(-50%, 0); pointer-events: auto; }
.qr-popover img { width: 100%; display: block; border-radius: 15px; }
.qr-popover small { display: block; margin-top: 8px; color: var(--brand-ink); font-size: 10px; font-weight: 750; }

.footer-brand { margin-top: 132px; opacity: .22; }
.footer-brand img { width: 32px; height: 32px; object-fit: contain; filter: grayscale(1); }
.footer-brand p { margin: 18px 0 0; color: var(--brand-graphite); font-size: 9px; font-weight: 750; letter-spacing: .2em; }

.reveal { opacity: 1; transform: none; }

:focus-visible { outline: 3px solid var(--brand-amber); outline-offset: 4px; }

@media (max-width: 980px) {
  .hero { grid-template-columns: 1fr; gap: 54px; padding-top: 128px; }
  .offer-summary { min-height: 390px; }
  .pain-grid { grid-template-columns: 1fr; }
  .pain-card { min-height: 190px; }
  .pain-card + .pain-card { border-left: 0; border-top: 1px solid var(--line-dark); }
  .proof-section { padding-inline: 34px; }
  .video-grid { gap: 12px; }
  .decision { grid-template-columns: 1fr; gap: 54px; }
  .section-intro { position: static; }
  .pricing-card { grid-template-columns: 1fr; }
  .pricing-main { min-height: 480px; border-right: 0; border-bottom: 1px solid var(--line-light); }
  .control-panel { gap: 44px; }
}

@media (max-width: 820px) {
  .video-toolbar { margin-bottom: 10px; justify-content: space-between; }
  .video-pagination { display: flex; align-items: center; gap: 1px; }
  .sync-button { width: 44px; height: 44px; }
  .video-grid {
    width: auto;
    padding-bottom: 14px;
    grid-template-columns: none;
    grid-auto-flow: column;
    grid-auto-columns: clamp(244px, 78vw, 292px);
    gap: 12px;
    overflow-x: auto;
    overscroll-behavior-inline: contain;
    scroll-snap-type: inline mandatory;
    scroll-padding-inline: 0;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
  }
  .video-grid::-webkit-scrollbar { display: none; }
  .video-card { scroll-snap-align: start; scroll-snap-stop: always; }
}

@media (max-width: 760px) {
  .shell { width: min(100% - 32px, 620px); }
  .section-space { padding-block: 84px; }
  .header-inner { width: calc(100% - 32px); }
  .menu-content { padding: 68px 28px 32px; }
  .menu-links a { font-size: 24px; }
  .hero { min-height: auto; padding-top: 116px; padding-bottom: 78px; }
  .hero h1,
  .proof-head h2,
  .section-intro h2,
  .partnership-head h2,
  .control-panel h2,
  .site-footer h2 { font-size: 44px; }
  .hero-en { font-size: 16px; }
  .hero-lead { font-size: 16px; }
  .mobile-offer { display: block; margin: 22px 0 -14px; color: var(--brand-bronze-text); font-size: 13px; font-weight: 750; letter-spacing: .02em; }
  .hero-actions { align-items: flex-start; flex-direction: column; }
  .offer-summary { min-height: 350px; padding: 30px; border-radius: 30px; }
  .offer-path { flex-wrap: wrap; justify-content: flex-start; }
  .pain-section { padding-bottom: 84px; }
  .pain-heading h2 { font-size: 42px; }
  .pain-grid { margin-top: 36px; border-radius: 28px; }
  .pain-card { min-height: 180px; padding: 26px; }
  .proof-wrap { padding: 0 8px 80px; }
  .proof-section { padding: 52px 16px 26px; border-radius: 38px; }
  .proof-head { grid-template-columns: 1fr; gap: 22px; margin: 0 8px 20px; }
  .proof-head h2 { font-size: clamp(34px, 9.2vw, 38px); line-height: 1.04; }
  .proof-head > p { font-size: 15px; }
  .video-toolbar { padding-inline: 8px; }
  .video-grid { margin-inline: -8px; padding-inline: 8px; scroll-padding-inline: 8px; }
  .cover-copy strong { font-size: 27px; }
  .proof-note { margin-inline: 14px; line-height: 1.6; }
  .decision-row { min-height: 126px; grid-template-columns: 28px 1fr; gap: 12px; }
  .decision-row > .row-number { padding-top: 34px; }
  .decision-row > div { padding: 28px 0; }
  .partnership { padding: 84px 16px 90px; }
  .workflow-grid { grid-template-columns: 1fr; margin-top: 50px; border-radius: 30px; }
  .workflow-card { min-height: 230px; padding: 28px; }
  .workflow-card:nth-child(even) { border-left: 0; }
  .workflow-card:nth-child(n+2) { border-top: 1px solid var(--line-dark); }
  .pricing-card { border-radius: 36px; }
  .pricing-main,
  .pricing-scope { padding: 34px 28px; }
  .pricing-main { min-height: 440px; }
  .price-lockup { font-size: 78px; }
  .scope-groups { grid-template-columns: 1fr; gap: 28px; }
  .scope-group h4 { min-height: 0; }
  .scope-separate p { grid-template-columns: 1fr; gap: 5px; }
  .human-control { padding-bottom: 84px; }
  .control-panel { padding: 40px 28px; grid-template-columns: 1fr; border-radius: 34px; }
  .site-footer { padding-top: 92px; }
  .footer-invite p { font-size: 13px; }
  .footer-brand { margin-top: 100px; }
  .footer-brand p { line-height: 1.6; }
  .qr-popover { left: auto; right: 0; transform: translateY(10px); }
  .qr-button.open .qr-popover { transform: translateY(0); }
  .qr-popover::after { left: auto; right: 18px; margin-left: 0; }
}

@media (max-width: 420px) {
  .hero h1,
  .section-intro h2,
  .partnership-head h2,
  .control-panel h2,
  .site-footer h2 { font-size: 40px; }
  .offer-price { font-size: 72px; }
  .pill-button { width: 100%; }
  .contact-actions { width: 100%; }
  .wechat-copy { flex: 1; justify-content: center; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}