:root {
  --paper: #f6f8f1;
  --paper-deep: #edf2e8;
  --ink: #123f33;
  --green: #19765d;
  --green-bright: #23896b;
  --green-soft: #dceade;
  --lime: #d7f486;
  --muted: #647a70;
  --line: #d8e2d5;
  --white: #ffffff;
  --shadow: 0 24px 80px rgba(19, 63, 51, .12);
  --shell: min(1180px, calc(100% - 48px));
  color: var(--ink);
  font-family: "Microsoft YaHei", "Microsoft YaHei UI", "PingFang SC", "Noto Sans SC", system-ui, sans-serif;
  font-synthesis: none;
  scroll-behavior: smooth;
}

* { box-sizing: border-box; }
html { scroll-padding-top: 88px; }
body { margin: 0; background: var(--paper); color: var(--ink); overflow-x: hidden; }
body, button, a { -webkit-font-smoothing: antialiased; }
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; }
button { font: inherit; }
svg { fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
code { font-family: "Cascadia Mono", Consolas, monospace; }
.shell { width: var(--shell); margin-inline: auto; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.skip-link { position: fixed; z-index: 100; left: 16px; top: -80px; padding: 12px 18px; color: #fff; background: var(--ink); border-radius: 10px; transition: top .2s; }
.skip-link:focus { top: 16px; }

.site-header { position: fixed; z-index: 20; inset: 0 0 auto; height: 78px; transition: background .25s, box-shadow .25s; }
.site-header.is-scrolled { background: rgba(246, 248, 241, .9); box-shadow: 0 1px 0 rgba(18, 63, 51, .08); backdrop-filter: blur(18px); }
.header-inner { height: 100%; display: flex; align-items: center; justify-content: space-between; }
.brand { display: inline-flex; align-items: center; gap: 13px; color: var(--ink); text-decoration: none; }
.brand-mark { display: grid; width: 44px; height: 44px; place-items: center; color: #fff; background: var(--green); border-radius: 13px; box-shadow: 0 10px 24px rgba(25, 118, 93, .18); }
.brand-mark svg { width: 27px; height: 27px; stroke-width: 2; }
.brand strong { display: block; font-size: 20px; line-height: 1.05; letter-spacing: .02em; }
.brand small { display: block; margin-top: 5px; font-family: "Segoe UI", sans-serif; font-size: 8px; line-height: 1; letter-spacing: .38em; }
.site-nav { display: flex; align-items: center; gap: 34px; }
.site-nav > a:not(.button) { color: #4f6b61; font-size: 14px; text-decoration: none; }
.site-nav > a:not(.button):hover { color: var(--green); }
.nav-toggle { display: none; width: 44px; height: 44px; padding: 10px; background: transparent; border: 0; }
.nav-toggle > span:not(.sr-only) { display: block; height: 2px; margin: 5px 0; background: var(--ink); border-radius: 3px; }

.button { display: inline-flex; min-height: 46px; align-items: center; justify-content: center; gap: 10px; padding: 0 22px; border: 1px solid transparent; border-radius: 13px; font-weight: 700; text-decoration: none; transition: transform .2s, box-shadow .2s, background .2s; }
.button:hover { transform: translateY(-2px); }
.button:focus-visible, .text-link:focus-visible, summary:focus-visible, button:focus-visible, .site-nav a:focus-visible { outline: 3px solid rgba(35, 137, 107, .35); outline-offset: 4px; }
.button svg { width: 21px; height: 21px; }
.button-small { min-height: 42px; padding-inline: 18px; color: #fff; background: var(--ink); font-size: 14px; }
.button-primary { color: #fff; background: var(--green); box-shadow: 0 16px 34px rgba(25, 118, 93, .24); }
.button-primary:hover { background: var(--green-bright); box-shadow: 0 20px 42px rgba(25, 118, 93, .3); }
.button-large { min-height: 58px; padding-inline: 27px; border-radius: 16px; font-size: 17px; }
.button-lime { color: var(--ink); background: var(--lime); box-shadow: 0 16px 40px rgba(0, 0, 0, .16); }

.hero { position: relative; min-height: 910px; padding: 156px 0 46px; background: linear-gradient(145deg, #f8faf4 0%, #f2f6ec 62%, #eaf1e4 100%); overflow: hidden; }
.hero::before { content: ""; position: absolute; inset: 0; opacity: .22; background-image: radial-gradient(#52796c 0.65px, transparent .65px); background-size: 22px 22px; mask-image: linear-gradient(90deg, #000, transparent 48%); }
.hero-orbit { position: absolute; border-radius: 50%; pointer-events: none; }
.hero-orbit-one { width: 760px; height: 760px; right: -240px; top: 80px; background: rgba(218, 233, 211, .6); }
.hero-orbit-two { width: 570px; height: 570px; right: -110px; top: 175px; border: 1px solid rgba(25, 118, 93, .16); }
.hero-grid { position: relative; z-index: 2; display: grid; grid-template-columns: .87fr 1.13fr; gap: 70px; align-items: center; }
.eyebrow, .section-kicker { margin: 0 0 22px; color: var(--green); font-size: 14px; font-weight: 700; letter-spacing: .12em; }
.eyebrow { display: flex; align-items: center; gap: 10px; }
.eyebrow span { width: 28px; height: 2px; background: var(--lime); }
.hero h1 { margin: 0; font-size: clamp(50px, 5.15vw, 78px); line-height: 1.12; letter-spacing: -.055em; }
.hero h1 em { color: var(--green); font-style: normal; }
.hero-lead { max-width: 590px; margin: 30px 0 0; color: var(--muted); font-size: 18px; line-height: 1.85; }
.hero-actions { display: flex; align-items: center; gap: 24px; margin-top: 34px; }
.text-link { color: var(--ink); font-size: 14px; font-weight: 700; text-decoration: none; }
.text-link span { color: var(--green); }
.release-line { display: flex; flex-wrap: wrap; align-items: center; gap: 11px; margin-top: 25px; color: #5f766b; font-size: 13px; }
.release-line i { display: block; width: 3px; height: 3px; background: #8ea397; border-radius: 50%; }
.download-note { margin: 13px 0 0; color: #73877e; font-size: 12px; }
.download-note code { color: var(--ink); }

.hero-visual { position: relative; min-width: 0; padding: 44px 0 48px; }
.window-card { position: relative; overflow: hidden; background: #fff; border: 1px solid #c8d7ca; border-radius: 22px; box-shadow: var(--shadow); }
.window-bar { display: flex; height: 42px; align-items: center; gap: 7px; padding: 0 16px; background: #edf2e9; border-bottom: 1px solid #d8e2d5; }
.window-bar > span { width: 9px; height: 9px; background: #b6c6b5; border-radius: 50%; }
.window-bar > span:first-child { background: #8cac8c; }
.window-bar small { margin-left: auto; color: #667b70; font-size: 10px; }
.preview-media { position: relative; overflow: hidden; }
.preview-media img { width: 100%; height: auto; aspect-ratio: auto; object-fit: contain; }
.qr-veil { position: absolute; z-index: 2; left: 24.7%; top: 46.8%; display: grid; width: 20.1%; height: 30.8%; box-sizing: border-box; place-items: center; padding: 8px; color: #4f6d61; background: rgba(241, 246, 237, .96); border: 1px solid rgba(25, 118, 93, .18); border-radius: 11px; box-shadow: inset 0 0 24px rgba(255, 255, 255, .35); font-size: 10px; font-weight: 700; line-height: 1.55; text-align: center; backdrop-filter: blur(10px); }
.float-card { position: absolute; z-index: 3; display: flex; align-items: center; gap: 12px; padding: 13px 16px; background: rgba(255, 255, 255, .94); border: 1px solid rgba(25, 118, 93, .16); border-radius: 16px; box-shadow: 0 14px 40px rgba(18, 63, 51, .14); backdrop-filter: blur(12px); }
.float-card strong, .float-card small { display: block; }
.float-card strong { font-size: 13px; }
.float-card small { margin-top: 4px; color: #74877d; font-size: 10px; }
.float-card-phone { left: -34px; bottom: 6px; }
.float-card-local { right: -18px; top: 10px; }
.float-icon { display: grid; width: 36px; height: 36px; place-items: center; color: var(--green); background: #e9f1e3; border-radius: 10px; }
.float-icon svg { width: 20px; height: 20px; }
.status-dot { width: 9px; height: 9px; background: #51a87f; border: 3px solid #dff2e7; border-radius: 50%; box-sizing: content-box; }
.trust-strip { position: relative; z-index: 2; display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: 80px; padding-top: 28px; border-top: 1px solid rgba(18, 63, 51, .12); }
.trust-strip span { display: flex; align-items: center; justify-content: center; gap: 10px; color: #49695d; font-size: 14px; font-weight: 700; }
.trust-strip svg { width: 22px; height: 22px; color: var(--green); }

.section { padding: 118px 0; }
.section-heading { max-width: 700px; margin: 0 auto 58px; text-align: center; }
.section-heading h2, .showcase-copy h2, .download-copy h2, .faq-intro h2 { margin: 0; font-size: clamp(36px, 4vw, 56px); line-height: 1.2; letter-spacing: -.045em; }
.section-heading > p:last-child { margin: 20px 0 0; color: var(--muted); font-size: 17px; line-height: 1.75; }
.feature-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.feature-card { position: relative; min-height: 330px; padding: 34px; overflow: hidden; background: rgba(255, 255, 255, .72); border: 1px solid var(--line); border-radius: 24px; box-shadow: 0 18px 60px rgba(18, 63, 51, .045); }
.feature-card::after { content: ""; position: absolute; width: 180px; height: 180px; right: -100px; bottom: -100px; border: 1px solid rgba(25, 118, 93, .16); border-radius: 50%; }
.feature-card-wide { grid-column: span 2; min-height: 300px; padding-right: 43%; background: linear-gradient(120deg, #fff, #eef4e9); }
.card-number { position: absolute; right: 30px; top: 26px; color: #98aa9f; font-family: "Segoe UI", sans-serif; font-size: 13px; letter-spacing: .12em; }
.feature-icon { display: grid; width: 54px; height: 54px; place-items: center; color: var(--green); background: #e5efdf; border-radius: 16px; }
.feature-icon svg { width: 27px; height: 27px; }
.feature-card h3 { margin: 27px 0 12px; font-size: 29px; letter-spacing: -.03em; }
.feature-card p { max-width: 560px; margin: 0; color: var(--muted); font-size: 15px; line-height: 1.8; }
.mini-flow { position: absolute; right: 34px; left: 59%; bottom: 42px; display: flex; align-items: center; justify-content: center; gap: 10px; }
.mini-flow span { padding: 12px 15px; color: #3f6458; background: #fff; border: 1px solid #d5e0d3; border-radius: 12px; font-size: 12px; font-weight: 700; }
.mini-flow b { color: #80a272; }
.path-sample { display: block; margin-top: 25px; padding: 13px 15px; overflow: hidden; color: #4a6b5e; background: #eff4eb; border-radius: 10px; font-size: 12px; text-overflow: ellipsis; white-space: nowrap; }
.progress-demo { position: relative; height: 9px; margin-top: 32px; background: #e6ede1; border-radius: 10px; }
.progress-demo span { display: block; width: 66%; height: 100%; background: var(--green); border-radius: inherit; }
.progress-demo b { position: absolute; right: 0; top: -27px; color: var(--green); font-family: "Segoe UI", sans-serif; font-size: 12px; }
.feature-card-dark { color: #fff; background: var(--ink); border-color: var(--ink); }
.feature-card-dark .feature-icon { color: var(--lime); background: rgba(255, 255, 255, .08); }
.feature-card-dark p { color: #c8d9cf; }
.feature-card-dark .card-number { color: #799389; }
.tag-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 25px; }
.tag-row span { padding: 8px 11px; color: #dce9e1; border: 1px solid rgba(255, 255, 255, .17); border-radius: 99px; font-size: 11px; }

.showcase { background: var(--paper-deep); }
.showcase-grid { display: grid; grid-template-columns: 1.22fr .78fr; gap: 76px; align-items: center; }
.showcase-image { position: relative; padding: 12px; background: #fff; border: 1px solid #d7e1d3; border-radius: 24px; box-shadow: var(--shadow); }
.showcase-image .preview-media { border-radius: 15px; }
.showcase-image img { border-radius: inherit; }
.showcase-image > span { position: absolute; right: 25px; bottom: 25px; padding: 8px 11px; color: #4e6b60; background: rgba(248, 250, 246, .9); border: 1px solid #d7e1d3; border-radius: 9px; font-size: 10px; backdrop-filter: blur(8px); }
.showcase-image .qr-veil { padding: 7px; }
.showcase-copy > p:not(.section-kicker) { margin: 25px 0 0; color: var(--muted); font-size: 16px; line-height: 1.85; }
.check-list { display: grid; gap: 15px; margin: 30px 0 0; padding: 0; list-style: none; }
.check-list li { display: flex; gap: 11px; color: #456459; font-size: 14px; line-height: 1.65; }
.check-list span { display: grid; width: 22px; height: 22px; flex: 0 0 auto; place-items: center; color: #fff; background: var(--green); border-radius: 50%; font-size: 12px; }

.steps-section { background: #fff; }
.steps-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin: 0; padding: 0; list-style: none; counter-reset: none; }
.steps-list li { position: relative; min-height: 280px; padding: 30px; background: var(--paper); border: 1px solid var(--line); border-radius: 22px; }
.steps-list li:not(:last-child)::after { content: "→"; position: absolute; z-index: 2; right: -20px; top: 48%; display: grid; width: 40px; height: 40px; place-items: center; color: var(--green); background: #fff; border: 1px solid var(--line); border-radius: 50%; }
.step-index { display: block; margin-bottom: 30px; color: #789081; font-family: "Segoe UI", sans-serif; font-size: 13px; letter-spacing: .14em; }
.step-icon { display: grid; width: 54px; height: 54px; place-items: center; color: var(--green); background: #e3eddd; border-radius: 15px; }
.step-icon svg { width: 27px; height: 27px; }
.steps-list h3 { margin: 22px 0 10px; font-size: 23px; }
.steps-list p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.8; }
.steps-list code { color: var(--ink); }
.network-note { display: flex; max-width: 880px; align-items: flex-start; gap: 18px; margin: 34px auto 0; padding: 24px 28px; background: #edf5ec; border: 1px solid #d4e3d2; border-radius: 18px; }
.network-icon { display: grid; width: 44px; height: 44px; flex: 0 0 auto; place-items: center; color: var(--green); background: #fff; border-radius: 13px; }
.network-icon svg { width: 24px; height: 24px; }
.network-note strong { display: block; margin: 1px 0 7px; font-size: 15px; }
.network-note p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.7; }

.download-section { padding-block: 90px; background: var(--paper); }
.download-card { position: relative; display: grid; grid-template-columns: 1.08fr .92fr; gap: 70px; align-items: center; padding: 60px; overflow: hidden; color: #fff; background: var(--ink); border-radius: 30px; box-shadow: 0 30px 90px rgba(18, 63, 51, .22); }
.download-card::before, .download-card::after { content: ""; position: absolute; border: 1px solid rgba(215, 244, 134, .18); border-radius: 50%; pointer-events: none; }
.download-card::before { width: 380px; height: 380px; right: -130px; top: -190px; }
.download-card::after { width: 240px; height: 240px; right: -50px; top: -120px; }
.download-copy, .release-card { position: relative; z-index: 1; }
.download-copy .section-kicker { color: var(--lime); }
.download-copy h2 { max-width: 650px; }
.download-copy > p:not(.section-kicker) { margin: 18px 0 28px; color: #c8d8cf; }
.release-card { margin: 0; padding: 28px; background: rgba(255, 255, 255, .07); border: 1px solid rgba(255, 255, 255, .12); border-radius: 20px; }
.release-card > div { display: grid; grid-template-columns: 90px 1fr; gap: 15px; padding: 12px 0; border-bottom: 1px solid rgba(255, 255, 255, .1); }
.release-card > div:last-of-type { border-bottom: 0; }
.release-card dt { color: #9fb6aa; font-size: 12px; }
.release-card dd { margin: 0; font-family: "Segoe UI", "Microsoft YaHei", sans-serif; font-size: 13px; }
.hash-row dd { min-width: 0; }
.hash-row code { display: block; overflow-wrap: anywhere; color: #dce9e0; font-size: 10px; line-height: 1.6; }
.hash-row button { margin-top: 10px; padding: 7px 10px; color: var(--lime); background: transparent; border: 1px solid rgba(215, 244, 134, .35); border-radius: 8px; cursor: pointer; font-size: 11px; }
.copy-status { min-height: 18px; margin: 10px 0 0; color: #b5c8bd; font-size: 10px; }

.faq-section { background: #fff; }
.faq-grid { display: grid; grid-template-columns: .68fr 1.32fr; gap: 90px; align-items: start; }
.faq-intro { position: sticky; top: 120px; }
.faq-intro > p:last-child { margin: 20px 0 0; color: var(--muted); line-height: 1.8; }
.faq-list { border-top: 1px solid var(--line); }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list summary { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 25px 3px; font-size: 17px; font-weight: 700; cursor: pointer; list-style: none; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary span { color: var(--green); font-size: 24px; font-weight: 400; transition: transform .2s; }
.faq-list details[open] summary span { transform: rotate(45deg); }
.faq-list details p { margin: -5px 45px 25px 3px; color: var(--muted); font-size: 14px; line-height: 1.9; }

.site-footer { padding: 38px 0; background: #edf2e8; border-top: 1px solid var(--line); }
.footer-inner { display: flex; align-items: center; gap: 24px; }
.footer-brand .brand-mark { width: 38px; height: 38px; border-radius: 11px; }
.footer-brand .brand-mark svg { width: 23px; height: 23px; }
.footer-brand strong { font-size: 17px; }
.footer-inner > p { color: var(--muted); font-size: 12px; }
.copyright { margin-left: auto; }

.js .reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s ease, transform .7s ease; }
.js .reveal.is-visible { opacity: 1; transform: none; }

@media (max-width: 1050px) {
  .hero { min-height: auto; }
  .hero-grid { grid-template-columns: 1fr; gap: 38px; }
  .hero-copy { max-width: 760px; }
  .hero-visual { max-width: 860px; margin-inline: auto; }
  .hero-orbit-one { top: 400px; }
  .hero-orbit-two { top: 500px; }
  .trust-strip { margin-top: 50px; }
  .showcase-grid { grid-template-columns: 1fr; gap: 50px; }
  .showcase-copy { max-width: 750px; }
  .download-card { grid-template-columns: 1fr; gap: 38px; }
  .faq-grid { gap: 55px; }
}

@media (max-width: 820px) {
  :root { --shell: min(100% - 34px, 680px); }
  .site-header { height: 68px; }
  .nav-toggle { display: block; cursor: pointer; }
  .site-nav { position: absolute; z-index: 20; top: 62px; right: 17px; display: none; width: min(330px, calc(100vw - 34px)); align-items: stretch; gap: 0; padding: 12px; background: #fff; border: 1px solid var(--line); border-radius: 16px; box-shadow: var(--shadow); }
  .site-nav.is-open { display: grid; }
  .site-nav > a:not(.button) { padding: 13px 12px; }
  .site-nav .button { margin-top: 6px; }
  .hero { padding-top: 120px; }
  .hero h1 { font-size: clamp(46px, 11vw, 68px); }
  .trust-strip { grid-template-columns: repeat(2, 1fr); row-gap: 24px; }
  .trust-strip span { justify-content: flex-start; }
  .section { padding: 90px 0; }
  .feature-grid { grid-template-columns: 1fr; }
  .feature-card-wide { grid-column: auto; padding-right: 34px; }
  .mini-flow { position: static; justify-content: flex-start; margin-top: 28px; }
  .steps-list { grid-template-columns: 1fr; }
  .steps-list li { min-height: 0; }
  .steps-list li:not(:last-child)::after { content: "↓"; right: 50%; top: auto; bottom: -29px; transform: translateX(50%); }
  .faq-grid { grid-template-columns: 1fr; gap: 35px; }
  .faq-intro { position: static; }
}

@media (max-width: 560px) {
  :root { --shell: calc(100% - 28px); }
  .brand-mark { width: 40px; height: 40px; }
  .brand strong { font-size: 18px; }
  .hero { padding-top: 108px; }
  .hero h1 { font-size: clamp(41px, 12.2vw, 58px); }
  .hero-lead { font-size: 16px; }
  .hero-actions { align-items: stretch; flex-direction: column; gap: 17px; }
  .button-large { width: 100%; }
  .text-link { align-self: center; }
  .release-line { gap: 8px; font-size: 11px; }
  .hero-visual { padding: 35px 0 80px; }
  .window-card { border-radius: 15px; }
  .window-bar { height: 32px; }
  .window-bar small { display: none; }
  .float-card { padding: 11px 12px; }
  .float-card-phone { left: -5px; bottom: 23px; }
  .float-card-local { right: -4px; top: 2px; }
  .float-card strong { font-size: 11px; }
  .float-card small { font-size: 8px; }
  .float-icon { width: 30px; height: 30px; }
  .qr-veil { font-size: 7px; border-radius: 6px; }
  .trust-strip { grid-template-columns: 1fr; margin-top: 20px; }
  .section { padding: 74px 0; }
  .section-heading { margin-bottom: 36px; text-align: left; }
  .section-heading h2, .showcase-copy h2, .download-copy h2, .faq-intro h2 { font-size: 35px; }
  .feature-card { min-height: 0; padding: 26px; border-radius: 19px; }
  .feature-card h3 { font-size: 25px; }
  .mini-flow { flex-wrap: wrap; gap: 7px; }
  .mini-flow span { padding: 9px 10px; }
  .showcase-grid { gap: 36px; }
  .showcase-image { padding: 7px; border-radius: 17px; }
  .showcase-image .preview-media { border-radius: 11px; }
  .showcase-image > span { right: 13px; bottom: 13px; }
  .network-note { padding: 20px; }
  .download-card { width: calc(100% - 20px); padding: 35px 24px; border-radius: 23px; }
  .release-card { padding: 21px; }
  .release-card > div { grid-template-columns: 76px 1fr; }
  .faq-list summary { font-size: 15px; }
  .faq-list details p { margin-right: 18px; }
  .footer-inner { align-items: flex-start; flex-direction: column; gap: 10px; }
  .footer-inner > p { margin: 0; }
  .copyright { margin-left: 0; }
}

@media (prefers-reduced-motion: reduce) {
  :root { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}