:root {
  --ink: #17201e;
  --muted: #63706c;
  --paper: #f3f5f2;
  --white: #fff;
  --line: #d7ddd9;
  --green: #167a64;
  --green-dark: #0d5848;
  --green-soft: #dff0e9;
  --navy: #263a52;
  --amber: #d48a2c;
  --red: #e96964;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; min-width: 320px; color: var(--ink); background: var(--paper); font-family: "Microsoft YaHei", "PingFang SC", system-ui, sans-serif; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }
.site-header { width: min(1180px, calc(100% - 40px)); height: 76px; margin: auto; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: flex; align-items: center; gap: 11px; }
.brand-mark { width: 40px; height: 40px; display: grid; place-items: center; color: white; background: var(--green); border-radius: 6px; }
.brand-mark i { width: 22px; height: 22px; }
.brand strong, .brand small { display: block; }
.brand strong { font-size: 17px; }
.brand small { margin-top: 2px; color: var(--muted); font-size: 10px; }
nav { display: flex; align-items: center; gap: 24px; color: #4e5a56; font-size: 13px; }
nav a:hover { color: var(--green); }
.nav-download { padding: 9px 13px; color: white; background: var(--ink); border-radius: 5px; }
.nav-download:hover { color: white; background: var(--green-dark); }

.hero-band { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: #e9eeea; }
.hero { width: min(1120px, calc(100% - 40px)); min-height: 640px; margin: auto; display: grid; grid-template-columns: minmax(0, 1.04fr) minmax(390px, .96fr); gap: 78px; align-items: center; padding: 58px 0 64px; }
.hero > * { min-width: 0; }
.eyebrow { display: flex; align-items: center; gap: 9px; color: var(--green-dark); font: 700 11px ui-monospace, "Cascadia Mono", monospace; }
.eyebrow span { width: 8px; height: 8px; background: var(--amber); border-radius: 50%; }
h1 { margin: 18px 0 12px; font-size: clamp(50px, 7vw, 78px); line-height: 1.05; letter-spacing: 0; }
.lead { max-width: 590px; margin: 0; color: #4f5c58; font-size: 18px; line-height: 1.85; }
.hero-actions { display: flex; align-items: center; gap: 12px; margin-top: 30px; }
.primary-button, .secondary-button, .download-white { min-height: 56px; display: inline-flex; align-items: center; justify-content: center; gap: 11px; border-radius: 6px; }
.primary-button { padding: 10px 20px; color: white; background: var(--green); }
.primary-button:hover { background: var(--green-dark); }
.primary-button i, .download-white i { width: 21px; height: 21px; }
.primary-button small, .primary-button strong, .download-white small, .download-white strong { display: block; }
.primary-button small, .download-white small { opacity: .72; font-size: 10px; }
.primary-button strong, .download-white strong { margin-top: 2px; font-size: 15px; }
.secondary-button { padding: 10px 16px; border: 1px solid #b7c1bc; background: rgba(255,255,255,.55); font-size: 13px; }
.secondary-button:hover { border-color: var(--green); color: var(--green-dark); background: white; }
.secondary-button i { width: 18px; height: 18px; }
.release-facts { display: flex; gap: 0; margin: 30px 0 0; padding: 0; }
.release-facts div { min-width: 100px; padding-right: 25px; margin-right: 25px; border-right: 1px solid #c5cdc8; }
.release-facts div:last-child { border: 0; }
.release-facts dt { color: var(--muted); font-size: 10px; }
.release-facts dd { margin: 5px 0 0; font-size: 13px; font-weight: 700; }

.product-visual { position: relative; min-height: 540px; display: grid; place-items: center; }
.phone { position: relative; width: 302px; height: 590px; overflow: hidden; color: white; background: #101816; border: 9px solid #111917; border-radius: 34px; box-shadow: 22px 28px 0 #cad2cd; }
.phone-top { position: absolute; z-index: 4; inset: 0 0 auto; height: 60px; padding: 12px 9px; display: grid; grid-template-columns: 38px 1fr 38px; align-items: center; text-align: center; background: rgba(11,18,16,.78); }
.phone-top button { width: 36px; height: 36px; display: grid; place-items: center; padding: 0; color: white; background: rgba(255,255,255,.12); border: 0; border-radius: 50%; }
.phone-top i { width: 18px; height: 18px; }
.phone-top strong { overflow: hidden; font-size: 14px; text-overflow: ellipsis; white-space: nowrap; }
.camera-view { position: absolute; inset: 0 0 126px; overflow: hidden; background: #59635f; }
.camera-view::before { content: ""; position: absolute; inset: 0; background: rgba(20,28,25,.22); }
.package { position: absolute; width: 190px; height: 105px; padding: 11px; background: #d6c29e; border: 1px solid #9b896a; transform: rotate(-8deg); }
.package-a { left: -20px; top: 95px; }
.package-b { right: -38px; top: 245px; transform: rotate(12deg); background: #c9d2ca; }
.package span { width: 104px; height: 46px; display: block; background: repeating-linear-gradient(90deg, #111 0 2px, white 2px 4px, #111 4px 5px, white 5px 8px); }
.package b { display: block; margin-top: 4px; color: #222; font: 7px ui-monospace, monospace; }
.scan-frame { position: absolute; left: 9%; top: 31%; width: 82%; height: 178px; border: 3px solid #55d3ad; border-radius: 7px; box-shadow: 0 0 0 70px rgba(10,16,14,.37); }
.scan-frame i { position: absolute; top: 50%; left: 16px; right: 16px; height: 2px; background: var(--red); }
.scan-frame small { position: absolute; left: 0; right: 0; bottom: 12px; color: white; text-align: center; font-size: 10px; text-shadow: 0 1px 3px #000; }
.scan-summary { position: absolute; z-index: 5; left: 0; right: 0; bottom: 0; min-height: 134px; padding: 14px; display: grid; grid-template-columns: 1fr auto auto; gap: 8px; align-items: center; background: #18231f; border-radius: 7px 7px 22px 22px; }
.scan-summary small { display: block; color: #aab6b1; font-size: 9px; }
.scan-summary strong { display: block; margin-top: 1px; font-size: 25px; }
.scan-summary em { font-size: 11px; font-style: normal; }
.scan-summary button { height: 36px; padding: 0 10px; display: flex; align-items: center; gap: 4px; color: white; background: transparent; border: 1px solid #8b9792; border-radius: 5px; font-size: 11px; }
.scan-summary button i { width: 14px; height: 14px; }
.scan-summary .done { background: var(--green); border-color: var(--green); }
.scan-summary p { grid-column: 1 / -1; min-width: 0; margin: 0; overflow: hidden; color: #c2cbc7; font-size: 9px; text-overflow: ellipsis; white-space: nowrap; }
.scan-summary p span { width: 6px; height: 6px; display: inline-block; margin-right: 6px; background: #55d3ad; border-radius: 50%; }
.visual-caption { position: absolute; right: -6px; bottom: 48px; width: 230px; min-height: 68px; padding: 12px; display: flex; align-items: center; gap: 11px; color: white; background: var(--navy); border-radius: 6px; box-shadow: 0 12px 30px rgba(24,39,58,.18); }
.visual-caption > i { width: 22px; height: 22px; color: #f0b45f; }
.visual-caption strong, .visual-caption small { display: block; }
.visual-caption strong { font-size: 13px; }
.visual-caption small { margin-top: 3px; color: #c0ccd8; font-size: 10px; line-height: 1.4; }

.section { width: min(1100px, calc(100% - 40px)); margin: auto; padding: 92px 0; }
.section-heading { max-width: 700px; margin-bottom: 38px; }
.section-heading.compact { margin-bottom: 28px; }
.section-index { color: var(--green); font: 700 11px ui-monospace, "Cascadia Mono", monospace; }
.section-index.light { color: #99d8c9; }
.section-heading h2, .download-layout h2 { margin: 11px 0 10px; font-size: clamp(29px, 4vw, 42px); line-height: 1.25; letter-spacing: 0; }
.section-heading p, .download-layout > div > p { margin: 0; color: var(--muted); line-height: 1.75; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.feature-grid article { min-height: 210px; padding: 28px 26px; background: white; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.feature-grid article > i { width: 27px; height: 27px; color: var(--green); }
.feature-grid article:nth-child(2) > i, .feature-grid article:nth-child(5) > i { color: var(--navy); }
.feature-grid article:nth-child(3) > i, .feature-grid article:nth-child(6) > i { color: var(--amber); }
.feature-grid h3 { margin: 28px 0 8px; font-size: 18px; }
.feature-grid p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.7; }

.workflow-band { color: white; background: #1d2926; }
.workflow { padding-top: 74px; padding-bottom: 76px; }
.workflow .section-index { color: #75d8c1; }
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; margin: 0; padding: 0; background: #41504b; list-style: none; border: 1px solid #41504b; }
.steps li { position: relative; min-height: 155px; padding: 24px 20px; background: #24322e; }
.steps li > b { position: absolute; right: 16px; top: 13px; color: #70807a; font: 700 24px ui-monospace, monospace; }
.steps li > i { width: 25px; height: 25px; color: #73d5be; }
.steps strong, .steps span { display: block; }
.steps strong { margin-top: 28px; font-size: 15px; }
.steps span { margin-top: 5px; color: #aebdb8; font-size: 12px; line-height: 1.5; }

.roadmap-list { border-top: 1px solid var(--line); }
.roadmap-list article { display: grid; grid-template-columns: 220px 1fr; gap: 38px; padding: 34px 0; border-bottom: 1px solid var(--line); }
.phase span, .phase small { display: block; }
.phase span { width: fit-content; padding: 6px 9px; color: white; background: var(--green); border-radius: 4px; font-size: 11px; font-weight: 800; }
.phase.later span { background: var(--navy); }
.phase small { margin-top: 10px; color: var(--muted); }
.roadmap-list ul { display: grid; grid-template-columns: 1fr 1fr; gap: 24px 30px; margin: 0; padding: 0; list-style: none; }
.roadmap-list li { display: flex; align-items: flex-start; gap: 12px; color: var(--muted); font-size: 13px; line-height: 1.65; }
.roadmap-list li i { width: 19px; height: 19px; flex: none; margin-top: 2px; color: var(--green); }
.roadmap-list article:last-child li i { color: var(--navy); }
.roadmap-list li strong { display: block; margin-bottom: 2px; color: var(--ink); font-size: 14px; }

.download-band { color: white; background: var(--green-dark); }
.download-layout { width: min(1000px, calc(100% - 40px)); margin: auto; padding: 78px 0; display: grid; grid-template-columns: 1.1fr .9fr; gap: 80px; align-items: center; }
.download-layout > div > p { color: #b9d8d0; }
.download-white { margin-top: 25px; padding: 10px 18px; color: var(--green-dark); background: white; }
.download-white:hover { background: #eef7f4; }
.install-steps { display: grid; gap: 1px; margin: 0; padding: 0; background: rgba(255,255,255,.16); list-style: none; border: 1px solid rgba(255,255,255,.16); }
.install-steps li { min-height: 82px; padding: 15px 16px; display: flex; align-items: center; gap: 14px; background: #104f43; }
.install-steps li > b { width: 34px; height: 34px; display: grid; place-items: center; flex: none; color: #0e5144; background: #9be1d1; border-radius: 50%; }
.install-steps strong, .install-steps small { display: block; }
.install-steps strong { font-size: 13px; }
.install-steps small { margin-top: 3px; color: #b9d8d0; font-size: 10px; line-height: 1.45; }
footer { min-height: 74px; width: min(1100px, calc(100% - 40px)); margin: auto; display: flex; align-items: center; justify-content: space-between; color: var(--muted); font-size: 12px; }
footer strong { color: var(--green-dark); }

@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr 330px; gap: 35px; }
  .phone { width: 270px; height: 540px; }
  .product-visual { min-height: 510px; }
  .visual-caption { right: 0; }
  .feature-grid { grid-template-columns: 1fr 1fr; }
  .steps { grid-template-columns: 1fr 1fr; }
  .download-layout { gap: 40px; }
}

@media (max-width: 700px) {
  .site-header { width: min(100% - 28px, 1180px); height: 68px; }
  nav a:not(.nav-download) { display: none; }
  .hero { width: min(100% - 32px, 1120px); grid-template-columns: 1fr; padding-top: 48px; text-align: center; }
  .eyebrow, .hero-actions, .release-facts { justify-content: center; }
  .lead { margin-left: auto; margin-right: auto; }
  .product-visual { min-height: 555px; }
  .section { width: min(100% - 32px, 1100px); padding: 70px 0; }
  .section-heading { margin-left: auto; margin-right: auto; text-align: center; }
  .roadmap-list article { grid-template-columns: 1fr; gap: 22px; }
  .phase span { margin: auto; }
  .phase { text-align: center; }
  .download-layout { width: min(100% - 32px, 1000px); grid-template-columns: 1fr; padding: 65px 0; }
}

@media (max-width: 520px) {
  .brand small { display: none; }
  .nav-download { padding: 8px 10px; }
  h1 { font-size: 50px; }
  .lead { font-size: 16px; }
  .hero-actions { display: grid; }
  .primary-button, .secondary-button { width: 100%; }
  .release-facts { width: 100%; max-width: 360px; margin-left: auto; margin-right: auto; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .release-facts div { min-width: 0; margin: 0; padding: 0 6px; }
  .release-facts dd { font-size: 12px; overflow-wrap: anywhere; }
  .product-visual { min-height: 520px; }
  .phone { width: 252px; height: 500px; border-width: 7px; box-shadow: 13px 18px 0 #cad2cd; }
  .camera-view { bottom: 126px; }
  .visual-caption { right: -2px; bottom: 10px; width: 210px; }
  .feature-grid, .steps, .roadmap-list ul { grid-template-columns: 1fr; }
  .feature-grid article { min-height: 180px; }
  .steps li { min-height: 135px; }
  .download-white { width: 100%; }
  footer { padding: 20px 0; flex-direction: column; justify-content: center; gap: 5px; text-align: center; }
}