:root {
  --bg: #191919;
  --panel: #222222;
  --green: #6df6a1;
  --muted: #a1a1a1;
  --subtle: #6b6b6b;
  --white: #ffffff;
  --line: rgba(255, 255, 255, 0.12);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 86px; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--white);
  font-family: Inter, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { display: block; }
.hero-image-wrap img, .scenario-image img, .app-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
button, a { -webkit-tap-highlight-color: transparent; }
::selection { background: var(--green); color: #101010; }

.section-shell { width: min(1180px, calc(100% - 48px)); margin: 0 auto; }
.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  height: 72px;
  background: rgba(25, 25, 25, 0.88);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(16px);
}
.header-inner {
  width: min(1180px, calc(100% - 48px));
  height: 100%;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand { display: inline-flex; align-items: center; gap: 11px; font-size: 14px; font-weight: 700; letter-spacing: .08em; }
.brand small { color: var(--subtle); font-size: 11px; font-weight: 500; letter-spacing: .02em; margin-left: 4px; }
.brand-symbol {
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  background: var(--green);
  color: #151515;
  border-radius: 50%;
  font-size: 14px;
  font-weight: 900;
}
.site-header nav { display: flex; align-items: center; gap: 30px; }
.site-header nav a { color: #c9c9c9; font-size: 14px; transition: color .2s ease; }
.site-header nav a:hover, .site-header nav a:focus-visible { color: var(--green); }

.eyebrow {
  margin: 0 0 22px;
  color: var(--green);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .16em;
  text-transform: uppercase;
}
.hero {
  min-height: 790px;
  padding: 140px 0 72px;
  display: grid;
  grid-template-columns: 1.03fr .97fr;
  gap: 74px;
  align-items: center;
}
.hero h1, .section-heading h2, .scenario-content h2, .app-copy h2, .privacy-inner h2,
.about-section h2, .contact-section h2 {
  margin: 0;
  font-size: clamp(42px, 5.4vw, 76px);
  line-height: 1.08;
  letter-spacing: -.055em;
  font-weight: 620;
}
.hero-description {
  max-width: 650px;
  margin: 30px 0 0;
  color: #b6b6b6;
  font-size: 17px;
  line-height: 1.9;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 36px; }
.button {
  min-height: 48px;
  padding: 0 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 36px;
  border: 1px solid var(--line);
  font-size: 14px;
  font-weight: 650;
  transition: .2s ease;
}
.button-primary { background: var(--green); color: #111; border-color: var(--green); }
.button-primary:hover { background: #8bffb7; }
.button-secondary:hover { border-color: #777; }
.development-note { margin: 28px 0 0; display: flex; align-items: center; gap: 9px; color: var(--subtle); font-size: 12px; }
.status-dot { width: 7px; height: 7px; background: var(--green); border-radius: 50%; box-shadow: 0 0 14px rgba(109, 246, 161, .6); }
.hero-visual { min-width: 0; }
.hero-image-wrap { position: relative; aspect-ratio: .83; overflow: hidden; background: #ede8df; }
.hero-image-wrap img { object-fit: cover; }
.visual-caption { display: flex; justify-content: space-between; margin-top: 13px; color: var(--subtle); font-size: 10px; letter-spacing: .12em; }

.product-section { padding: 120px 0; background: var(--panel); }
.section-heading { display: grid; grid-template-columns: 1fr 2fr; column-gap: 70px; align-items: start; }
.section-heading .eyebrow { grid-row: 1 / span 2; }
.section-heading h2 { font-size: clamp(38px, 4.4vw, 64px); }
.section-heading > p:last-child { max-width: 720px; margin: 28px 0 0; color: var(--muted); font-size: 16px; line-height: 1.9; }
.connection-grid { margin-top: 76px; display: grid; grid-template-columns: repeat(3, 1fr); border: 1px solid var(--line); }
.connection-grid article { min-height: 330px; padding: 30px; border-right: 1px solid var(--line); }
.connection-grid article:last-child { border-right: 0; }
.connection-grid .accent-panel { background: var(--green); color: #151515; }
.step { font-size: 12px; color: var(--subtle); }
.accent-panel .step { color: #39744f; }
.connection-grid h3 { margin: 78px 0 14px; font-size: 24px; letter-spacing: -.02em; }
.connection-grid p { min-height: 72px; margin: 0; color: var(--muted); font-size: 14px; line-height: 1.75; }
.accent-panel p { color: #244c32; }
.tag-list { list-style: none; padding: 0; margin: 27px 0 0; display: flex; flex-wrap: wrap; gap: 7px; }
.tag-list li { padding: 5px 8px; border: 1px solid var(--line); color: #bcbcbc; font-size: 11px; }
.accent-panel .tag-list li { border-color: rgba(20,20,20,.22); color: #173c24; }
.fine-print { max-width: 920px; margin: 28px 0 0 auto; padding-left: 20px; border-left: 2px solid var(--green); color: var(--subtle); font-size: 12px; line-height: 1.8; }

.feature-section { padding: 120px 0; }
.compact-heading { display: block; }
.compact-heading h2 { font-size: clamp(38px, 4.2vw, 60px); }
.feature-list { margin-top: 70px; border-top: 1px solid var(--line); }
.feature-row {
  display: grid;
  grid-template-columns: 70px 1fr 1.35fr;
  gap: 24px;
  align-items: center;
  min-height: 126px;
  border-bottom: 1px solid var(--line);
}
.feature-row > span { color: var(--green); font-size: 11px; }
.feature-row h3 { margin: 0; font-size: 23px; font-weight: 540; }
.feature-row p { margin: 0; color: var(--muted); line-height: 1.75; font-size: 14px; }

.scenario-section { padding: 120px 0; background: #efeee9; color: #151515; }
.scenario-grid { display: grid; grid-template-columns: .94fr 1.06fr; gap: 85px; align-items: stretch; }
.scenario-image { position: relative; min-height: 680px; overflow: hidden; background: #d8d8d8; }
.scenario-image img { object-fit: cover; }
.scenario-content { padding: 30px 0; }
.scenario-content h2 { font-size: clamp(40px, 4.3vw, 62px); }
.scenario-list { margin-top: 55px; border-top: 1px solid rgba(0,0,0,.18); }
.scenario-list article { padding: 22px 0; display: grid; grid-template-columns: 170px 1fr; gap: 20px; border-bottom: 1px solid rgba(0,0,0,.18); }
.scenario-list h3 { margin: 0; font-size: 16px; }
.scenario-list p { margin: 0; color: #5e5e5e; font-size: 14px; line-height: 1.65; }
.notice { margin: 35px 0 0; padding: 18px 20px; background: #deddd8; color: #555; font-size: 12px; line-height: 1.7; }

.app-section { padding: 130px 0 150px; display: grid; grid-template-columns: .9fr 1.1fr; gap: 90px; align-items: center; overflow: hidden; }
.app-copy h2 { font-size: clamp(50px, 5.5vw, 76px); }
.app-lead { margin: 28px 0 0; color: var(--muted); font-size: 16px; line-height: 1.85; }
.check-list { margin: 35px 0 0; padding: 0; list-style: none; display: grid; grid-template-columns: 1fr 1fr; gap: 0 22px; }
.check-list li { padding: 12px 0 12px 20px; border-bottom: 1px solid var(--line); color: #c6c6c6; font-size: 13px; position: relative; }
.check-list li::before { content: "•"; position: absolute; left: 0; color: var(--green); }
.store-status { margin-top: 38px; display: inline-flex; align-items: center; gap: 15px; padding: 13px 18px; border: 1px solid rgba(109,246,161,.45); }
.android-mark { width: 34px; height: 34px; display: grid; place-items: center; border-radius: 50%; background: var(--green); color: #161616; font-weight: 800; }
.store-status > span:last-child { display: grid; gap: 3px; font-size: 14px; }
.store-status small { color: var(--subtle); font-size: 9px; letter-spacing: .15em; }
.app-image-stack { min-height: 650px; position: relative; }
.app-image { position: absolute; overflow: hidden; background: #ddd; box-shadow: 0 28px 70px rgba(0,0,0,.35); }
.app-image img { object-fit: cover; }
.app-image.large { inset: 0 11% 7% 17%; }
.app-image.small { width: 42%; aspect-ratio: .76; left: 0; bottom: 0; border: 8px solid var(--bg); }

.privacy-band { background: var(--green); color: #151515; padding: 105px 0; }
.privacy-inner { display: grid; grid-template-columns: .95fr 1.05fr; gap: 100px; }
.eyebrow.dark { color: #316c47; }
.privacy-inner h2 { font-size: clamp(38px, 4.3vw, 61px); }
.privacy-inner > div:last-child > p { margin: 0; font-size: 17px; line-height: 1.85; }
.privacy-inner .use-reminder { margin-top: 28px !important; color: #2a5238; font-size: 13px !important; }
.inline-links { margin-top: 34px; display: flex; flex-wrap: wrap; gap: 24px; }
.inline-links a { padding-bottom: 5px; border-bottom: 1px solid #151515; font-size: 13px; font-weight: 700; }

.about-section { padding: 120px 0; }
.about-section .section-heading { display: block; }
.about-section h2 { font-size: clamp(40px, 4.6vw, 64px); }
.about-grid { margin-top: 68px; display: grid; grid-template-columns: .9fr 1.1fr; gap: 95px; }
.about-intro p { margin: 0 0 24px; font-size: 19px; line-height: 1.85; color: #c7c7c7; }
.company-facts { margin: 0; border-top: 1px solid var(--line); }
.company-facts div { padding: 20px 0; display: grid; grid-template-columns: 170px 1fr; gap: 20px; border-bottom: 1px solid var(--line); }
.company-facts dt { color: var(--subtle); font-size: 12px; }
.company-facts dd { margin: 0; color: #d3d3d3; font-size: 13px; line-height: 1.65; }
.company-facts a:hover { color: var(--green); }

.contact-section { padding: 110px 0; background: var(--panel); }
.contact-inner { display: grid; grid-template-columns: .85fr 1.15fr; gap: 100px; }
.contact-section h2 { font-size: clamp(40px, 4.3vw, 62px); }
.contact-inner > div:first-child > p:last-child { max-width: 450px; color: var(--muted); line-height: 1.8; }
.contact-links { border-top: 1px solid var(--line); }
.contact-links > * { padding: 20px 0; display: flex; justify-content: space-between; gap: 24px; border-bottom: 1px solid var(--line); }
.contact-links span { color: var(--subtle); font-size: 12px; }
.contact-links strong { text-align: right; font-size: 14px; font-weight: 500; }
.contact-links a:hover strong { color: var(--green); }

.site-footer { padding: 65px 0 28px; background: #111; color: #aaa; }
.footer-grid { display: grid; grid-template-columns: 1fr 1.35fr .65fr; gap: 55px; }
.footer-brand { color: #fff; margin-bottom: 22px; }
.footer-grid p { margin: 8px 0; font-size: 11px; line-height: 1.7; }
.footer-address { padding-top: 38px; }
.footer-address a:hover { color: var(--green); }
.footer-nav { display: grid; align-content: start; gap: 13px; padding-top: 38px; font-size: 12px; }
.footer-nav a:hover { color: var(--green); }
.footer-bottom { margin-top: 52px; padding-top: 22px; border-top: 1px solid rgba(255,255,255,.08); display: flex; justify-content: space-between; gap: 20px; color: #555; font-size: 10px; }

.legal-main { padding: 132px 0 110px; }
.legal-shell { width: min(860px, calc(100% - 48px)); margin: 0 auto; }
.legal-kicker { color: var(--green); font-size: 11px; font-weight: 700; letter-spacing: .15em; }
.legal-main h1 { margin: 18px 0 22px; font-size: clamp(40px, 5vw, 64px); line-height: 1.12; letter-spacing: -.04em; }
.legal-meta { margin: 0; color: var(--subtle); font-size: 12px; }
.legal-summary { margin: 35px 0 55px; padding: 24px; background: var(--panel); border-left: 3px solid var(--green); color: #c6c6c6; line-height: 1.8; }
.legal-content { color: #bdbdbd; font-size: 14px; line-height: 1.85; }
.legal-content section { padding: 34px 0; border-top: 1px solid var(--line); }
.legal-content h2 { margin: 0 0 17px; color: #fff; font-size: 22px; letter-spacing: -.02em; }
.legal-content h3 { margin: 25px 0 10px; color: #e8e8e8; font-size: 16px; }
.legal-content p { margin: 10px 0; }
.legal-content ul { margin: 12px 0; padding-left: 20px; }
.legal-content li { margin: 8px 0; }
.legal-content a { color: var(--green); text-decoration: underline; text-underline-offset: 3px; }
.legal-content table { width: 100%; border-collapse: collapse; margin: 20px 0; font-size: 12px; }
.legal-content th, .legal-content td { padding: 13px; border: 1px solid var(--line); text-align: left; vertical-align: top; }
.legal-content th { color: #fff; background: var(--panel); }
.callout { margin: 20px 0; padding: 18px 20px; background: var(--panel); color: #d1d1d1; }
.deletion-email { display: inline-block; margin: 12px 0; font-size: 22px; }
.steps { counter-reset: steps; list-style: none; padding: 0 !important; }
.steps li { position: relative; padding: 18px 0 18px 54px; border-bottom: 1px solid var(--line); }
.steps li::before { counter-increment: steps; content: counter(steps, decimal-leading-zero); position: absolute; left: 0; color: var(--green); font-size: 11px; }

@media (max-width: 900px) {
  .section-shell, .header-inner, .legal-shell { width: min(100% - 32px, 700px); }
  .site-header { height: 64px; }
  .site-header nav { gap: 17px; }
  .site-header nav a:nth-child(3) { display: none; }
  .hero { min-height: auto; padding: 115px 0 72px; grid-template-columns: 1fr; gap: 55px; }
  .hero-visual { max-width: 600px; }
  .section-heading { grid-template-columns: 1fr; }
  .section-heading .eyebrow { grid-row: auto; }
  .connection-grid { grid-template-columns: 1fr; }
  .connection-grid article { min-height: 0; border-right: 0; border-bottom: 1px solid var(--line); }
  .connection-grid article:last-child { border-bottom: 0; }
  .connection-grid h3 { margin-top: 40px; }
  .connection-grid p { min-height: 0; }
  .scenario-grid, .app-section, .privacy-inner, .about-grid, .contact-inner { grid-template-columns: 1fr; gap: 55px; }
  .scenario-image { min-height: 600px; }
  .app-image-stack { min-height: 590px; max-width: 620px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-nav { grid-column: 1 / -1; padding-top: 0; grid-template-columns: repeat(3, auto); justify-content: start; gap: 25px; }
}

@media (max-width: 600px) {
  .section-shell, .header-inner, .legal-shell { width: calc(100% - 32px); }
  .brand small { display: none; }
  .site-header nav { gap: 14px; }
  .site-header nav a { font-size: 12px; }
  .site-header nav a:nth-child(4) { display: none; }
  .hero { padding-top: 106px; }
  .hero h1 { font-size: 44px; }
  .hero-description { font-size: 15px; }
  .hero-image-wrap { aspect-ratio: .88; }
  .product-section, .feature-section, .scenario-section, .about-section { padding: 85px 0; }
  .section-heading h2, .scenario-content h2, .privacy-inner h2, .about-section h2, .contact-section h2 { font-size: 38px; }
  .connection-grid { margin-top: 48px; }
  .feature-list { margin-top: 45px; }
  .feature-row { grid-template-columns: 42px 1fr; padding: 25px 0; }
  .feature-row p { grid-column: 2; }
  .scenario-image { min-height: 470px; }
  .scenario-list article { grid-template-columns: 1fr; gap: 8px; }
  .app-section { padding: 90px 0 110px; }
  .app-copy h2 { font-size: 46px; }
  .check-list { grid-template-columns: 1fr; }
  .app-image-stack { min-height: 455px; }
  .app-image.large { inset: 0 4% 5% 13%; }
  .privacy-band, .contact-section { padding: 80px 0; }
  .about-grid { margin-top: 48px; }
  .about-intro p { font-size: 16px; }
  .company-facts div { grid-template-columns: 1fr; gap: 7px; }
  .contact-links > * { display: grid; }
  .contact-links strong { text-align: left; word-break: break-word; }
  .footer-grid { grid-template-columns: 1fr; gap: 20px; }
  .footer-address { padding-top: 0; }
  .footer-nav { grid-column: auto; grid-template-columns: 1fr; gap: 10px; }
  .footer-bottom { display: grid; }
  .legal-main { padding-top: 110px; }
  .legal-main h1 { font-size: 38px; }
  .legal-content table { display: block; overflow-x: auto; }
}

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