@charset "UTF-8";

:root {
  color-scheme: light;
  --paper: #f7f6f2;
  --ink: #232522;
  --muted: #696d64;
  --accent: #be4839;
  --line: #ddded6;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: var(--paper);
  font-synthesis: none;
  scroll-behavior: smooth;
  scroll-padding-top: 32px;
}

* { box-sizing: border-box; }
body { margin: 0; }
a { color: inherit; text-decoration: none; text-underline-offset: 5px; }
a:hover { text-decoration: underline; }
button, a, summary { -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 6px; }
img, video { display: block; max-width: 100%; height: auto; }
figure, blockquote, h1, h2, h3, p { margin: 0; }
h1, h2, h3 { font-weight: 650; }
h2 { font-size: clamp(32px, 3.5vw, 48px); line-height: 1.35; letter-spacing: -.035em; }
h3 { line-height: 1.45; }
.wrap { width: min(1160px, calc(100% - 80px)); margin-inline: auto; }
.section { padding-block: 100px; }
.skip-link { position: absolute; top: 8px; left: 8px; z-index: 10; padding: 12px 18px; background: white; transform: translateY(-160%); }
.skip-link:focus { transform: translateY(0); }
.header { height: 100px; display: flex; justify-content: space-between; align-items: center; gap: 24px; }
.brand { display: flex; align-items: center; gap: 11px; white-space: nowrap; font-size: 19px; font-weight: 650; letter-spacing: -.6px; }
.brand:hover { text-decoration: none; }
.brand img { border-radius: 50%; }
.brand-cn { margin-left: 12px; padding-left: 12px; border-left: 1px solid #bfc1b8; font-size: 13px; font-weight: 450; letter-spacing: 1px; }
nav { display: flex; align-items: center; gap: 30px; font-size: 13px; }
.nav-github { display: flex; align-items: center; gap: 20px; border: 1px solid #c4c6bd; border-radius: 6px; padding: 10px 16px; font-weight: 600; }
.hero { display: grid; grid-template-columns: 1fr 1fr; align-items: center; min-height: 650px; padding-top: 18px; padding-bottom: 55px; }
.eyebrow { font-family: var(--mono); font-size: 11px; letter-spacing: .1em; line-height: 1.7; font-weight: 500; margin-bottom: 23px; }
.hero .eyebrow { display: flex; align-items: center; gap: 9px; font-family: inherit; font-size: 12px; letter-spacing: .14em; }
.status-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 4px #be48390d; }
h1 { font-size: clamp(48px, 5.4vw, 72px); line-height: 1.25; letter-spacing: -.055em; font-weight: 700; }
.accent { color: var(--accent); }
.hero-description { margin-top: 29px; font-size: 17px; line-height: 1.9; color: var(--muted); }
.hero-actions { display: flex; align-items: center; gap: 30px; margin-top: 32px; }
.button { display: inline-flex; min-height: 50px; gap: 12px; align-items: center; justify-content: center; padding: 14px 24px; border-radius: 6px; font-size: 14px; font-weight: 600; transition: background .18s ease, transform .18s ease; }
.button:hover { transform: translateY(-2px); text-decoration: none; }
.button-primary { background: var(--accent); color: #fff; }
.button-primary:hover { background: #a53c30; }
.button svg { width: 16px; height: 16px; fill: currentColor; }
.text-link { display: inline-flex; gap: 16px; align-items: center; font-size: 13px; font-weight: 600; }
.hero-footnote { margin-top: 27px; color: var(--muted); font-size: 11px; }
.hero-footnote span { margin-inline: 8px; }
.hero-visual { height: 560px; position: relative; display: flex; align-items: center; justify-content: center; isolation: isolate; }
.hero-disc { position: absolute; width: 395px; height: 395px; background: #e9d2bd; border-radius: 50%; z-index: -1; }
.orbit { position: absolute; border: 1px solid #d9d4c8; border-radius: 50%; z-index: -1; transform: rotate(-30deg); }
.orbit-one { width: 510px; height: 300px; }
.orbit-two { width: 465px; height: 480px; }
.phone { width: 242px; padding: 6px; background: #2f302d; border-radius: 30px; box-shadow: 0 24px 40px #23252224, 0 5px 8px #2325221a; }
.phone img { border-radius: 24px; }
.hero-phone { transform: rotate(5deg); margin-left: 46px; }
.request-bubble { position: absolute; top: 35px; left: 0; z-index: 2; font-size: 15px; font-weight: 550; line-height: 1.65; background: #fffefb; border: 1px solid #e6e4dc; padding: 16px 42px 16px 20px; border-radius: 12px 12px 2px 12px; box-shadow: 0 10px 28px #2929230a; transform: rotate(-4deg); }
.bubble-label { display: block; font-size: 10px; color: var(--muted); letter-spacing: .1em; margin-bottom: 6px; font-weight: 400; }
.bubble-arrow { position: absolute; right: 17px; bottom: 17px; color: var(--accent); font-size: 20px; }
.done-bubble { position: absolute; bottom: 76px; right: -8px; z-index: 2; display: flex; align-items: center; gap: 12px; background: #fffefb; padding: 17px 21px; border-radius: 12px; box-shadow: 0 8px 40px #23252212; transform: rotate(-3deg); }
.done-mark { display: grid; place-items: center; width: 30px; height: 30px; color: #466345; border: 1px solid #bcccb9; border-radius: 50%; }
.done-bubble strong { font-size: 14px; font-weight: 600; display: block; }
.done-bubble small { display: block; font-size: 10px; margin-top: 4px; color: var(--muted); }
.hero-visual figcaption { position: absolute; bottom: -7px; font-size: 10px; letter-spacing: .07em; color: var(--muted); }
.principles { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); padding-block: 27px; }
.principles p { display: flex; align-items: start; gap: 17px; }
.principle-number { font-family: var(--mono); font-size: 10px; color: var(--accent); padding-top: 5px; }
.principles strong { display: block; font-size: 14px; font-weight: 550; }
.principles small { display: block; font-size: 11px; color: var(--muted); margin-top: 7px; }
.section-heading { display: flex; justify-content: space-between; gap: 40px; align-items: end; margin-bottom: 42px; }
.heading-note { color: var(--muted); font-size: 14px; line-height: 1.8; padding-bottom: 6px; }
.demo-stage { background: #292d29; color: #f6f4ec; border-radius: 18px; padding: 54px 70px; display: grid; grid-template-columns: 1.2fr 1fr; gap: 64px; align-items: center; }
.tag { font-size: 10px; letter-spacing: .08em; color: #d1d5c8; border: 1px solid #5d6259; display: inline-block; padding: 6px 10px; border-radius: 4px; }
.demo-story blockquote { font-size: clamp(23px, 2.5vw, 31px); line-height: 1.6; margin-top: 26px; letter-spacing: -.03em; font-weight: 500; }
.app-journey { list-style: none; padding: 0; margin: 25px 0 26px; display: grid; grid-template-columns: 1fr 1fr; gap: 19px 24px; }
.app-journey li { display: flex; align-items: center; gap: 10px; }
.app-letter { width: 32px; height: 32px; display: grid; place-items: center; border: 1px solid #555d52; border-radius: 8px; font-size: 16px; color: #e6cda9; font-family: var(--mono); }
.app-journey strong { display: block; font-weight: 500; font-size: 12px; }
.app-journey small { display: block; margin-top: 3px; font-size: 10px; color: #bdc1b8; }
.demo-stats { border-top: 1px solid #50564c; padding-top: 22px; display: flex; gap: 30px; }
.demo-stats p { color: #c9cdc2; font-size: 11px; }
.demo-stats strong { font-family: var(--mono); color: #f4d7ae; font-size: 41px; line-height: 1; font-weight: 400; margin-right: 4px; }
.light-link { display: inline-flex; gap: 18px; font-size: 11px; margin-top: 18px; text-decoration: underline; }
.demo-video { justify-self: center; width: 258px; }
.demo-video video { width: 100%; border: 5px solid #151715; border-radius: 24px; background: #151715; }
.demo-video figcaption { display: flex; align-items: center; justify-content: center; gap: 7px; margin-top: 17px; font-size: 9px; font-family: var(--mono); color: #c4c9bc; }
.record-dot { height: 5px; width: 5px; border-radius: 50%; background: #df8d78; }
.ecosystem { background: #eeeee7; }
.product-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 38px; margin-top: 50px; }
.product-row article { border-top: 1px solid #bfc3b6; padding-top: 24px; }
.product-index { display: block; color: #6b7163; font-size: 10px; letter-spacing: .1em; font-family: var(--mono); margin-bottom: 17px; }
.product-row h3 { font-size: 22px; font-weight: 550; }
.product-row p { font-size: 13px; line-height: 1.95; color: var(--muted); margin-top: 13px; }
.product-row a { margin-top: 19px; }
.desktop-showcase { margin-top: 54px; }
.window-bar { border: 1px solid #d5d8cd; border-bottom: 0; border-radius: 10px 10px 0 0; height: 34px; background: #f7f8f2; display: flex; align-items: center; gap: 6px; padding-inline: 14px; position: relative; }
.window-bar > span { width: 6px; height: 6px; border-radius: 50%; background: #c1c5b9; }
.window-bar p { position: absolute; left: 50%; transform: translateX(-50%); font-family: var(--mono); font-size: 8px; color: #6e7465; letter-spacing: .13em; white-space: nowrap; }
.desktop-showcase img { width: 100%; border: 1px solid #d5d8cd; border-radius: 0 0 6px 6px; }
.desktop-showcase figcaption { display: flex; justify-content: space-between; gap: 20px; font-size: 11px; color: var(--muted); margin-top: 18px; }
.virtual-section { display: grid; grid-template-columns: 1fr 1fr; gap: 90px; align-items: center; }
.virtual-visual { border-radius: 18px; background: #e8dfd0; padding: 30px 50px 25px; position: relative; }
.virtual-label { display: block; text-align: center; margin-bottom: 23px; font-size: 13px; letter-spacing: .06em; color: #655a4b; }
.virtual-visual video { width: 246px; margin-inline: auto; border: 5px solid #34352f; border-radius: 24px; background: #34352f; }
.virtual-visual figcaption { text-align: center; font-size: 9px; color: #655a4b; margin-top: 19px; }
.section-description { color: var(--muted); font-size: 15px; line-height: 1.95; margin-top: 22px; }
.virtual-steps { padding: 0; margin: 29px 0; list-style: none; display: grid; gap: 22px; }
.virtual-steps li { display: flex; gap: 20px; }
.virtual-steps li > span { font-family: var(--mono); color: var(--accent); font-size: 11px; padding-top: 5px; }
.virtual-steps h3 { font-size: 15px; font-weight: 550; }
.virtual-steps p { font-size: 12px; line-height: 1.8; margin-top: 5px; color: var(--muted); }
.scope-note { border-top: 1px solid var(--line); padding-top: 17px; font-size: 10px; line-height: 1.9; color: var(--muted); margin-bottom: 19px; }
.how-section { background: #e7eadd; }
.how-section .section-heading { margin-bottom: 50px; }
.decision-flow { display: grid; grid-template-columns: repeat(4, 1fr); margin: 0; padding: 0; list-style: none; }
.decision-flow li { border-top: 1px solid #a3ae94; padding: 24px 25px 0 0; position: relative; }
.decision-flow li:not(:last-child)::after { content: "→"; position: absolute; right: 25px; top: 22px; color: #5e6c4e; font-size: 18px; }
.flow-number { font-family: var(--mono); font-size: 11px; color: #5e6c4e; }
.decision-flow h3 { margin-top: 26px; font-size: 20px; font-weight: 550; }
.decision-flow p { margin-top: 12px; font-size: 13px; line-height: 1.9; color: #616957; }
.trust-section { display: grid; grid-template-columns: 1fr 1.05fr; gap: 80px; }
.trust-copy .text-link { margin-top: 27px; }
.faq { border-top: 1px solid var(--line); }
details { border-bottom: 1px solid var(--line); }
summary { padding: 23px 0; list-style: none; display: flex; justify-content: space-between; align-items: center; gap: 20px; font-size: 15px; font-weight: 550; cursor: pointer; }
summary::-webkit-details-marker { display: none; }
summary > span { color: var(--accent); font-size: 22px; font-weight: 400; line-height: 1; }
details[open] summary > span { transform: rotate(45deg); }
details p { padding: 0 30px 24px 0; font-size: 12px; line-height: 1.95; color: var(--muted); }
.closing { display: flex; justify-content: space-between; gap: 30px; align-items: center; background: #e9d9c9; border-radius: 18px; padding: 62px 65px; overflow: hidden; }
.closing .eyebrow { color: #7a5b46; font-size: 10px; margin-bottom: 20px; }
.closing h2 { font-size: 42px; }
.closing .button { margin-top: 27px; }
.closing-art { position: relative; flex: 0 0 280px; }
.closing-art img { width: 220px; height: 220px; border: 8px solid #f4ece1; border-radius: 50%; margin-left: 40px; transform: rotate(8deg); box-shadow: 0 8px 30px #61463512; }
.closing-art span { display: block; position: relative; z-index: 1; margin-bottom: -18px; color: #725643; font-size: 17px; line-height: 1.6; transform: rotate(-8deg); }
.footer { padding-block: 35px; margin-top: 30px; display: flex; justify-content: space-between; align-items: center; gap: 25px; }
.footer .brand { font-size: 13px; }
.footer .brand-cn { font-size: 10px; }
.footer p { font-size: 11px; color: var(--muted); }
.footer nav { font-size: 10px; gap: 23px; color: var(--muted); }

@media (max-width: 1050px) {
  .wrap { width: calc(100% - 64px); }
  .hero { min-height: 590px; }
  .hero-visual { height: 510px; }
  .hero-disc { width: 330px; height: 330px; }
  .orbit-one { width: 380px; height: 280px; }
  .orbit-two { width: 365px; height: 430px; }
  .orbit { max-width: 100%; transform: none; }
  .phone { width: 215px; }
  .request-bubble { left: -15px; font-size: 13px; top: 22px; }
  .done-bubble { right: -10px; bottom: 42px; padding: 14px; }
  .demo-stage { padding: 40px; gap: 30px; }
  .demo-video { width: 230px; }
  .demo-stats { gap: 24px; }
  .virtual-section { gap: 48px; }
  .virtual-visual { padding-inline: 30px; }
  .product-row { gap: 25px; }
  .trust-section { gap: 45px; }
  .closing { padding: 50px; }
  .closing h2 { font-size: 35px; }
  .closing-art { flex-basis: 240px; }
  .closing-art img { width: 190px; height: 190px; }
}

@media (max-width: 760px) {
  :root { scroll-padding-top: 20px; }
  .wrap { width: calc(100% - 44px); }
  .section { padding-block: 64px; }
  .header { height: 80px; gap: 10px; }
  .brand { font-size: 16px; gap: 8px; }
  .brand img { width: 32px; height: 32px; }
  .brand-cn { display: none; }
  .nav-section { display: none; }
  .nav-github { padding: 8px 12px; font-size: 12px; gap: 12px; }
  .hero { grid-template-columns: 1fr; padding-top: 33px; padding-bottom: 37px; }
  .hero-copy { position: relative; z-index: 2; }
  h1 { font-size: clamp(43px, 8.6vw, 62px); letter-spacing: -.04em; }
  .hero .eyebrow { font-size: 11px; margin-bottom: 19px; }
  .hero-description { font-size: 15px; margin-top: 20px; }
  .hero-actions { margin-top: 25px; }
  .hero-footnote { font-size: 10px; margin-top: 22px; }
  .hero-visual { margin-top: 31px; width: min(100%, 470px); margin-inline: auto; height: 505px; }
  .hero-disc { width: 310px; height: 310px; }
  .orbit-one { width: 99%; height: 280px; }
  .orbit-two { width: 86%; height: 405px; }
  .hero-phone { width: 212px; margin-left: 16px; }
  .request-bubble { top: 12px; left: 3px; font-size: 12px; padding: 13px 32px 13px 15px; }
  .bubble-label { font-size: 9px; }
  .done-bubble { right: 0; bottom: 40px; }
  .done-bubble strong { font-size: 12px; }
  .done-bubble small { font-size: 9px; }
  .hero-visual figcaption { bottom: 1px; }
  .principles { gap: 18px; padding-block: 23px; }
  .principles p { display: block; }
  .principle-number { display: block; margin-bottom: 10px; }
  .principles strong { font-size: 11px; line-height: 1.6; }
  .principles small { font-size: 10px; line-height: 1.7; }
  .section-heading { display: block; margin-bottom: 30px; }
  .eyebrow { font-size: 9px; margin-bottom: 16px; letter-spacing: .08em; }
  .heading-note { font-size: 13px; margin-top: 19px; }
  .demo-stage { grid-template-columns: 1fr; padding: 30px 24px; gap: 35px; border-radius: 12px; }
  .demo-story blockquote { font-size: clamp(23px, 5.7vw, 30px); }
  .app-journey { gap: 17px 12px; }
  .app-journey strong { font-size: 11px; }
  .app-journey small { font-size: 9px; }
  .app-letter { width: 28px; height: 28px; flex-shrink: 0; }
  .demo-stats { justify-content: space-between; gap: 10px; }
  .demo-stats strong { font-size: 34px; }
  .demo-stats p { font-size: 10px; }
  .demo-video { width: 238px; max-width: 100%; }
  .product-row { grid-template-columns: 1fr; margin-top: 32px; gap: 30px; }
  .product-row article { padding-top: 18px; }
  .product-index { margin-bottom: 10px; }
  .product-row h3 { font-size: 21px; }
  .product-row p { max-width: 550px; }
  .desktop-showcase { margin-top: 37px; }
  .desktop-showcase figcaption { display: block; line-height: 1.9; font-size: 10px; }
  .desktop-showcase figcaption span { display: block; }
  .window-bar p { font-size: 6px; }
  .window-bar { height: 27px; gap: 4px; padding-inline: 8px; }
  .window-bar > span { width: 4px; height: 4px; }
  .virtual-section { grid-template-columns: 1fr; gap: 35px; }
  .virtual-copy { grid-row: 1; }
  .virtual-visual { padding: 26px 24px 23px; }
  .virtual-visual video { width: 232px; }
  .section-description { font-size: 14px; }
  .virtual-steps { gap: 18px; }
  .how-section .section-heading { margin-bottom: 32px; }
  .decision-flow { grid-template-columns: 1fr 1fr; gap: 32px 22px; }
  .decision-flow li { padding: 18px 0 0; }
  .decision-flow li:not(:last-child)::after { right: 5px; top: 16px; }
  .decision-flow h3 { margin-top: 20px; font-size: 18px; }
  .decision-flow p { font-size: 11px; }
  .trust-section { grid-template-columns: 1fr; gap: 35px; }
  summary { font-size: 14px; }
  details p { padding-right: 10px; }
  .closing { padding: 35px 25px; gap: 30px; flex-direction: column; align-items: start; border-radius: 12px; }
  .closing h2 { font-size: 30px; }
  .closing-art { align-self: end; flex-basis: auto; display: flex; align-items: center; gap: 25px; margin-right: 12px; }
  .closing-art img { width: 110px; height: 110px; border-width: 4px; margin: 0; }
  .closing-art span { font-size: 13px; margin: 0; }
  .footer { flex-wrap: wrap; gap: 22px; margin-top: 12px; }
  .footer p { margin-left: auto; font-size: 10px; }
  .footer nav { width: 100%; justify-content: space-between; }
}

@media (prefers-reduced-motion: reduce) {
  :root { scroll-behavior: auto; }
  .button { transition: none; }
  .button:hover { transform: none; }
}