:root {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  color: #142925;
  background: #ffffff;
  --ink: #142925;
  --deep: #073b37;
  --brand: #0f7f75;
  --brand-bright: #22cdb9;
  --coral: #ef7659;
  --gold: #f4bd52;
  --mist: #edf5f2;
  --soft: #f7f9f8;
  --line: #dce7e3;
  --muted: #5e716c;
  --page: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; overflow-x: hidden; }
body.menu-open { overflow: hidden; }
button, input, textarea { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

.skip-link {
  position: fixed;
  left: 12px;
  top: -60px;
  z-index: 100;
  padding: 10px 14px;
  background: #fff;
  color: var(--deep);
}
.skip-link:focus { top: 12px; }
.page-width { width: min(calc(100% - 48px), var(--page)); margin: 0 auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: grid;
  grid-template-columns: 240px 1fr auto;
  align-items: center;
  min-height: 72px;
  padding: 0 max(24px, calc((100vw - var(--page)) / 2));
  border-bottom: 1px solid rgba(20, 41, 37, 0.09);
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(12px);
}
.brand img { width: 204px; height: 51px; object-fit: contain; object-position: left center; }
.desktop-nav { display: flex; justify-content: center; gap: 32px; }
.desktop-nav a, .text-link { color: #3c514c; font-size: 14px; font-weight: 700; }
.desktop-nav a:hover, .text-link:hover { color: var(--brand); }
.header-actions { display: flex; align-items: center; gap: 18px; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 24px;
  border: 1px solid var(--brand);
  border-radius: 6px;
  background: var(--brand);
  color: #fff;
  font-weight: 800;
  cursor: pointer;
  transition: transform 160ms ease, background 160ms ease, border-color 160ms ease;
}
.button:hover { transform: translateY(-2px); background: #0b6d65; border-color: #0b6d65; }
.button-small { min-height: 40px; padding: 0 18px; font-size: 14px; }
.menu-button, .mobile-nav { display: none; }

.hero {
  position: relative;
  min-height: clamp(570px, calc(100svh - 150px), 760px);
  overflow: hidden;
  background: var(--deep);
  color: #fff;
}
.hero-product-scene { position: absolute; inset: 0; overflow: hidden; }
.hero-product-scene::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(255,255,255,.045) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.045) 1px, transparent 1px);
  background-size: 64px 64px;
}
.hero-shade {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(7,59,55,.98) 0%, rgba(7,59,55,.9) 42%, rgba(7,59,55,.36) 72%, rgba(7,59,55,.12) 100%);
}
.hero-phone {
  position: absolute;
  right: max(7vw, calc((100vw - 1180px) / 2 + 70px));
  top: 54px;
  width: 354px;
  height: 704px;
  overflow: hidden;
  border: 10px solid #f5f8f7;
  border-radius: 38px;
  background: #fff;
  box-shadow: 0 38px 100px rgba(0,0,0,.38);
  transform: rotate(2deg);
}
.hero-phone::before {
  content: "";
  position: absolute;
  z-index: 2;
  top: 8px;
  left: 50%;
  width: 82px;
  height: 20px;
  border-radius: 20px;
  background: #142925;
  transform: translateX(-50%);
  pointer-events: none;
}
.hero-phone iframe { width: 430px; height: 900px; border: 0; transform: scale(.777); transform-origin: top left; pointer-events: none; }
.scene-card {
  position: absolute;
  z-index: 1;
  display: grid;
  gap: 8px;
  width: 260px;
  padding: 20px;
  border: 1px solid rgba(255,255,255,.22);
  border-radius: 8px;
  background: rgba(12,79,72,.86);
  box-shadow: 0 22px 50px rgba(0,0,0,.22);
}
.scene-card strong { font-size: 17px; }
.scene-card > span:last-child { color: rgba(255,255,255,.68); font-size: 12px; }
.scene-kicker { color: var(--brand-bright); font-size: 12px; font-weight: 800; }
.scene-company { right: max(2vw, calc((100vw - 1180px) / 2 - 84px)); top: 120px; }
.scene-lead { right: max(27vw, calc((100vw - 1180px) / 2 + 350px)); bottom: 90px; }
.hero-content { position: relative; z-index: 3; padding-top: 158px; }
.hero-content > * { max-width: 610px; }
.eyebrow { margin: 0 0 18px; color: var(--brand-bright); font-size: 14px; font-weight: 800; letter-spacing: 0; }
.eyebrow.dark { color: var(--brand); }
.hero h1 { margin: 0; font-size: 72px; line-height: 1.08; letter-spacing: 0; }
.hero-copy { margin: 28px 0 0; color: rgba(255,255,255,.82); font-size: 21px; line-height: 1.8; }
.hero-actions { display: flex; gap: 12px; margin-top: 34px; }
.button-light { border-color: #fff; background: #fff; color: var(--deep); }
.button-light:hover { border-color: #e9f3f0; background: #e9f3f0; }
.button-ghost { border-color: rgba(255,255,255,.48); background: transparent; }
.button-ghost:hover { border-color: #fff; background: rgba(255,255,255,.09); }
.hero-points { display: flex; gap: 28px; margin: 40px 0 0; padding: 0; list-style: none; color: rgba(255,255,255,.7); font-size: 13px; font-weight: 700; }
.hero-points li::before { content: ""; display: inline-block; width: 7px; height: 7px; margin-right: 9px; border-radius: 50%; background: var(--gold); }

.connection-strip { border-bottom: 1px solid var(--line); background: #fff; }
.connection-flow { display: grid; grid-template-columns: repeat(4, 1fr); min-height: 112px; }
.connection-flow span { display: flex; align-items: center; gap: 14px; padding: 0 26px; border-right: 1px solid var(--line); color: #40534e; font-size: 14px; font-weight: 800; }
.connection-flow span:first-child { border-left: 1px solid var(--line); }
.connection-flow b { color: var(--coral); font-size: 13px; }

.section { padding: 112px 0; }
.section-intro { max-width: 760px; margin-bottom: 56px; }
.section-intro h2, .ownership-copy h2, .contact-copy h2 { margin: 0; font-size: 44px; line-height: 1.3; letter-spacing: 0; }
.section-intro > p:last-child, .ownership-copy > p, .contact-copy > p { margin: 22px 0 0; color: var(--muted); font-size: 17px; line-height: 1.85; }
.section-intro.compact { max-width: 680px; }

.product-section { background: var(--soft); }
.product-workspace { display: grid; grid-template-columns: minmax(0, .9fr) minmax(430px, 1.1fr); min-height: 650px; border: 1px solid var(--line); background: #fff; }
.product-copy { display: flex; flex-direction: column; justify-content: center; padding: 68px; }
.segmented-control { display: flex; width: fit-content; padding: 4px; border: 1px solid var(--line); border-radius: 8px; background: var(--soft); }
.segmented-control button { min-height: 38px; padding: 0 16px; border: 0; border-radius: 5px; background: transparent; color: var(--muted); font-size: 13px; font-weight: 800; cursor: pointer; }
.segmented-control button[aria-selected="true"] { background: var(--deep); color: #fff; }
.preview-description { min-height: 220px; padding-top: 48px; }
.preview-label { margin: 0 0 13px; color: var(--coral); font-size: 13px; font-weight: 800; }
.preview-description h3 { margin: 0; font-size: 31px; line-height: 1.45; }
.preview-description > p:last-child { margin: 20px 0 0; color: var(--muted); line-height: 1.9; }
.arrow-link { display: inline-flex; gap: 12px; align-items: center; width: fit-content; color: var(--brand); font-weight: 800; }
.arrow-link span { font-size: 22px; }
.device-stage { position: relative; display: grid; place-items: center; overflow: hidden; background: var(--mist); }
.device-stage::before { content: ""; position: absolute; width: 410px; height: 410px; border: 1px solid #bfd9d2; border-radius: 50%; }
.device-stage::after { content: ""; position: absolute; width: 540px; height: 540px; border: 1px solid #d5e6e1; border-radius: 50%; }
.device-frame { position: relative; z-index: 2; width: 310px; height: 620px; overflow: hidden; border: 9px solid #16332f; border-radius: 34px; background: #fff; box-shadow: 0 30px 70px rgba(20,41,37,.26); }
.device-frame::before { content: ""; position: absolute; z-index: 3; top: 7px; left: 50%; width: 72px; height: 18px; border-radius: 14px; background: #16332f; transform: translateX(-50%); pointer-events: none; }
.device-frame iframe { width: 430px; height: 900px; border: 0; transform: scale(.68); transform-origin: top left; }
.stage-note { position: absolute; z-index: 3; right: 28px; bottom: 28px; display: grid; gap: 4px; padding: 14px 16px; border-left: 3px solid var(--coral); background: #fff; box-shadow: 0 12px 30px rgba(20,41,37,.12); }
.stage-note b { font-size: 13px; }
.stage-note span { color: var(--muted); font-size: 11px; }

.ownership-section { background: #fff; }
.ownership-layout { display: grid; grid-template-columns: minmax(0, 1fr) minmax(440px, .9fr); gap: 92px; align-items: center; }
.check-list { display: grid; gap: 26px; margin: 40px 0 0; padding: 0; list-style: none; }
.check-list li { display: grid; grid-template-columns: 16px 1fr; column-gap: 15px; }
.check-list li::before { content: ""; width: 10px; height: 10px; margin-top: 6px; border: 3px solid #fff; border-radius: 50%; background: var(--coral); box-shadow: 0 0 0 1px var(--coral); }
.check-list b, .check-list span { grid-column: 2; }
.check-list span { margin-top: 6px; color: var(--muted); font-size: 14px; line-height: 1.7; }
.handover-panel { border: 1px solid #ccdcd7; border-radius: 8px; box-shadow: 0 24px 70px rgba(20,41,37,.1); }
.panel-heading { display: flex; justify-content: space-between; align-items: center; min-height: 78px; padding: 0 28px; border-bottom: 1px solid var(--line); }
.panel-heading span { color: var(--muted); font-size: 13px; }
.panel-heading strong { font-size: 18px; }
.handover-steps { margin: 0; padding: 12px 28px; list-style: none; }
.handover-steps li { display: grid; grid-template-columns: 34px 1fr auto; gap: 14px; align-items: center; min-height: 88px; border-bottom: 1px solid #e8efed; }
.handover-steps li > span { display: grid; place-items: center; width: 30px; height: 30px; border: 1px solid #c8d7d2; border-radius: 50%; color: var(--muted); font-size: 12px; font-weight: 800; }
.handover-steps div { display: grid; gap: 5px; }
.handover-steps small, .handover-steps em { color: var(--muted); font-size: 11px; font-style: normal; }
.handover-steps li.done > span { border-color: var(--brand); background: var(--brand); color: #fff; }
.handover-steps li.active > span { border-color: var(--coral); color: var(--coral); }
.handover-steps li.active em { color: var(--coral); }
.ownership-result { display: flex; gap: 14px; align-items: center; margin: 8px 18px 18px; padding: 20px; border-radius: 6px; background: var(--mist); }
.result-dot { width: 11px; height: 11px; border-radius: 50%; background: var(--brand-bright); box-shadow: 0 0 0 5px rgba(34,205,185,.14); }
.ownership-result div { display: grid; gap: 3px; }
.ownership-result small { color: var(--muted); }

.feature-band { background: var(--deep); color: #fff; }
.feature-band .section-intro h2 { color: #fff; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid rgba(255,255,255,.16); border-left: 1px solid rgba(255,255,255,.16); }
.feature-grid article { min-height: 260px; padding: 34px 28px; border-right: 1px solid rgba(255,255,255,.16); border-bottom: 1px solid rgba(255,255,255,.16); }
.feature-grid article > span { color: var(--gold); font-size: 12px; font-weight: 800; }
.feature-grid h3 { margin: 48px 0 14px; font-size: 20px; }
.feature-grid p { margin: 0; color: rgba(255,255,255,.66); font-size: 14px; line-height: 1.8; }

.scenarios-section { background: #fff; }
.scenario-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.scenario-grid article { position: relative; min-height: 360px; padding: 34px; overflow: hidden; border: 1px solid var(--line); border-radius: 8px; }
.scenario-grid article::after { content: ""; position: absolute; right: -45px; bottom: -60px; width: 170px; height: 170px; border: 24px solid rgba(255,255,255,.24); border-radius: 50%; }
.scenario-sales { background: #e7f4f0; }
.scenario-service { background: #fff0eb; }
.scenario-event { background: #fff6dc; }
.scenario-number { color: var(--brand); font-size: 13px; font-weight: 800; }
.scenario-grid h3 { margin: 92px 0 16px; font-size: 27px; }
.scenario-grid p { margin: 0; color: #526660; line-height: 1.8; }
.scenario-grid article > span { position: absolute; left: 34px; bottom: 32px; z-index: 1; font-size: 13px; font-weight: 800; }

.contact-section { padding: 104px 0; background: #0a4540; color: #fff; }
.contact-layout { display: grid; grid-template-columns: minmax(0, .9fr) minmax(480px, 1.1fr); gap: 88px; align-items: start; }
.contact-copy > p { color: rgba(255,255,255,.7); }
.contact-details { display: grid; gap: 10px; margin-top: 34px; color: rgba(255,255,255,.82); font-size: 14px; }
.lead-form { display: grid; gap: 18px; padding: 34px; border-radius: 8px; background: #fff; color: var(--ink); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.lead-form label { display: grid; gap: 8px; color: #40534e; font-size: 13px; font-weight: 800; }
.lead-form input, .lead-form textarea { width: 100%; min-height: 48px; padding: 12px 13px; border: 1px solid #ccd9d5; border-radius: 6px; outline: none; color: var(--ink); background: #fff; }
.lead-form input:focus, .lead-form textarea:focus { border-color: var(--brand); box-shadow: 0 0 0 3px rgba(15,127,117,.12); }
.lead-form textarea { min-height: 116px; resize: vertical; }
.consent { display: flex !important; grid-template-columns: 18px 1fr; align-items: flex-start; gap: 9px !important; font-weight: 500 !important; line-height: 1.6; }
.consent input { width: 17px; min-height: 17px; margin: 2px 0 0; accent-color: var(--brand); }
.consent a { margin: 0 3px; color: var(--brand); font-weight: 800; }
.submit-button { width: 100%; }
.submit-button:disabled { opacity: .65; cursor: wait; transform: none; }
.form-status { min-height: 20px; margin: -6px 0 0; color: var(--brand); font-size: 13px; text-align: center; }
.form-status.error { color: #b53f2d; }

.site-footer { padding: 62px 0 22px; background: #102925; color: #fff; }
.footer-main { display: grid; grid-template-columns: 1fr 1.2fr; gap: 80px; padding-bottom: 48px; }
.footer-brand img { width: 230px; height: 58px; object-fit: contain; object-position: left center; }
.footer-brand p { color: rgba(255,255,255,.56); }
.footer-links { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; }
.footer-links div { display: grid; align-content: start; gap: 12px; }
.footer-links b { margin-bottom: 7px; }
.footer-links a { color: rgba(255,255,255,.58); font-size: 13px; }
.footer-links a:hover { color: #fff; }
.footer-bottom { display: flex; justify-content: space-between; gap: 24px; padding-top: 20px; border-top: 1px solid rgba(255,255,255,.12); color: rgba(255,255,255,.48); font-size: 12px; }

.legal-page { background: var(--soft); }
.legal-header { position: sticky; top: 0; z-index: 4; display: flex; justify-content: space-between; align-items: center; min-height: 68px; padding: 0 max(24px, calc((100vw - 920px) / 2)); border-bottom: 1px solid var(--line); background: rgba(255,255,255,.96); }
.legal-header img { width: 188px; }
.legal-header a:last-child { color: var(--brand); font-size: 14px; font-weight: 800; }
.legal-content { width: min(calc(100% - 40px), 920px); margin: 48px auto 80px; padding: 52px 58px; border: 1px solid var(--line); border-radius: 8px; background: #fff; }
.legal-content h1 { margin: 0 0 10px; font-size: 38px; }
.legal-meta { color: var(--muted); font-size: 13px; }
.legal-content h2 { margin: 42px 0 12px; font-size: 21px; }
.legal-content p, .legal-content li { color: #4d625c; line-height: 1.9; }
.legal-content ul { padding-left: 20px; }

@media (max-width: 1050px) {
  .site-header { grid-template-columns: 210px 1fr auto; }
  .desktop-nav { gap: 18px; }
  .hero-phone { right: 4vw; opacity: .72; }
  .scene-card { display: none; }
  .hero-shade { background: linear-gradient(90deg, rgba(7,59,55,.98) 0%, rgba(7,59,55,.91) 54%, rgba(7,59,55,.44) 100%); }
  .product-workspace { grid-template-columns: minmax(0, .9fr) minmax(380px, 1.1fr); }
  .product-copy { padding: 44px; }
  .ownership-layout { gap: 48px; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 820px) {
  .page-width { width: min(calc(100% - 32px), var(--page)); }
  .site-header { grid-template-columns: 1fr auto; min-height: 64px; padding: 0 16px; }
  .brand img { width: 176px; height: 44px; }
  .desktop-nav, .header-actions .text-link, .header-actions .button { display: none; }
  .menu-button { display: grid; gap: 5px; width: 42px; height: 42px; padding: 10px; border: 0; background: transparent; cursor: pointer; }
  .menu-button span { width: 22px; height: 2px; background: var(--deep); }
  .mobile-nav { position: fixed; inset: 64px 0 auto; z-index: 40; display: grid; padding: 18px 24px 28px; border-bottom: 1px solid var(--line); background: #fff; box-shadow: 0 18px 38px rgba(20,41,37,.12); }
  .mobile-nav[hidden] { display: none; }
  .mobile-nav a { min-height: 48px; padding: 13px 0; border-bottom: 1px solid #edf2f0; font-weight: 800; }
  .hero { min-height: 650px; }
  .hero-content { padding-top: 98px; }
  .hero h1 { font-size: 54px; }
  .hero-copy { max-width: 520px; font-size: 17px; }
  .hero-phone { right: -96px; top: 80px; width: 300px; height: 590px; opacity: .32; }
  .hero-shade { background: linear-gradient(90deg, rgba(7,59,55,.98) 0%, rgba(7,59,55,.86) 72%, rgba(7,59,55,.62) 100%); }
  .hero-points { gap: 14px; font-size: 12px; }
  .connection-flow { grid-template-columns: repeat(2, 1fr); }
  .connection-flow span { min-height: 76px; border-bottom: 1px solid var(--line); }
  .section { padding: 78px 0; }
  .section-intro h2, .ownership-copy h2, .contact-copy h2 { font-size: 34px; }
  .product-workspace { grid-template-columns: 1fr; }
  .product-copy { padding: 36px 30px 28px; }
  .device-stage { min-height: 620px; }
  .ownership-layout, .contact-layout { grid-template-columns: 1fr; gap: 54px; }
  .scenario-grid { grid-template-columns: 1fr; }
  .scenario-grid article { min-height: 300px; }
  .footer-main { grid-template-columns: 1fr; gap: 44px; }
}

@media (max-width: 520px) {
  .hero { min-height: 620px; }
  .hero-content { padding-top: 74px; }
  .hero h1 { font-size: 44px; }
  .hero-copy { margin-top: 22px; line-height: 1.7; }
  .hero-actions { display: grid; grid-template-columns: 1fr; width: min(100%, 320px); }
  .hero-points { flex-wrap: wrap; max-width: 280px; margin-top: 26px; }
  .connection-flow span { padding: 0 14px; font-size: 12px; }
  .section { padding: 66px 0; }
  .section-intro { margin-bottom: 36px; }
  .section-intro h2, .ownership-copy h2, .contact-copy h2 { font-size: 29px; }
  .section-intro > p:last-child, .ownership-copy > p, .contact-copy > p { font-size: 15px; }
  .product-workspace { border-left: 0; border-right: 0; }
  .product-copy { padding: 28px 20px; }
  .segmented-control { width: 100%; }
  .segmented-control button { flex: 1; padding: 0 7px; }
  .preview-description { min-height: 260px; padding-top: 34px; }
  .preview-description h3 { font-size: 25px; }
  .device-stage { min-height: 570px; }
  .device-frame { width: 270px; height: 540px; }
  .device-frame iframe { transform: scale(.59); }
  .stage-note { display: none; }
  .handover-panel { margin: 0 -4px; }
  .panel-heading, .handover-steps { padding-left: 18px; padding-right: 18px; }
  .handover-steps li { grid-template-columns: 30px 1fr; }
  .handover-steps em { display: none; }
  .feature-grid { grid-template-columns: 1fr; }
  .feature-grid article { min-height: 220px; }
  .feature-grid h3 { margin-top: 34px; }
  .scenario-grid article { padding: 28px; }
  .scenario-grid h3 { margin-top: 70px; }
  .scenario-grid article > span { left: 28px; }
  .contact-section { padding: 70px 0; }
  .contact-layout { gap: 38px; }
  .lead-form { padding: 24px 18px; }
  .form-row { grid-template-columns: 1fr; }
  .footer-links { grid-template-columns: 1fr 1fr; gap: 34px; }
  .footer-bottom { display: grid; }
  .legal-header { padding: 0 16px; }
  .legal-header img { width: 164px; }
  .legal-content { margin-top: 24px; padding: 32px 22px; }
  .legal-content h1 { font-size: 30px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}