:root {
  color-scheme: light;
  --yellow: #ffc400;
  --yellow-soft: #fff8dc;
  --ink: #202522;
  --muted: #646b66;
  --line: #e5e7e2;
  --surface: #f6f7f3;
  --white: #fff;
  --container: 1160px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 104px; }
body { margin: 0; color: var(--ink); background: var(--white); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif; font-size: 15px; line-height: 1.75; -webkit-font-smoothing: antialiased; }
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
p, h1, h2, h3, figure { margin: 0; }
a, summary { -webkit-tap-highlight-color: transparent; }
a:focus-visible, summary:focus-visible { outline: 3px solid #937000; outline-offset: 6px; }
::selection { color: var(--ink); background: var(--yellow); }
.container { width: min(var(--container), calc(100% - 64px)); margin-inline: auto; }
.skip-link { position: fixed; z-index: 20; top: -100px; left: 20px; padding: 12px 20px; background: var(--yellow); font-weight: 700; }
.skip-link:focus { top: 10px; }

.site-header { position: sticky; z-index: 10; top: 0; background: rgb(255 255 255 / 96%); border-bottom: 1px solid var(--line); }
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 28px; min-height: 88px; }
.brand { display: inline-flex; flex: 0 0 auto; align-items: center; gap: 13px; font-size: 21px; font-weight: 800; letter-spacing: .01em; line-height: 1.3; }
.brand img { border-radius: 10px; }
.brand-suffix { font-size: 17px; font-weight: 650; margin-left: 5px; }
.main-nav { display: flex; align-items: center; gap: 32px; font-size: 14px; font-weight: 550; }
.main-nav a { padding: 9px 0; transition: color .15s ease; }
.main-nav a:hover { color: #8b6b00; }
.main-nav a:nth-child(3) { border-bottom: 2px solid var(--yellow); }

.hero { overflow: hidden; background: linear-gradient(115deg, #fff 48%, #fcfcf7 100%); }
.hero-grid { display: grid; grid-template-columns: 1.13fr 1fr; gap: 38px; min-height: 660px; align-items: center; padding-block: 60px 65px; }
.eyebrow { display: flex; align-items: center; gap: 9px; margin-bottom: 20px; font-size: 12px; line-height: 1.5; letter-spacing: .14em; font-weight: 700; }
.eyebrow-mark { width: 7px; height: 7px; background: var(--yellow); border-radius: 50%; box-shadow: 0 0 0 4px var(--yellow-soft); }
h1 { font-size: clamp(40px, 4.6vw, 60px); line-height: 1.27; letter-spacing: -.065em; font-weight: 750; }
.hero-description { max-width: 445px; margin-top: 26px; font-size: 16px; line-height: 1.95; color: var(--muted); }
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 28px; margin-top: 32px; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 30px; min-height: 52px; padding: 13px 22px; border-radius: 6px; font-size: 14px; font-weight: 700; transition: background .15s ease; }
.button-primary { background: var(--yellow); }
.button-primary:hover { background: #f2b900; }
.button span, .text-link span { font-size: 19px; font-weight: 400; }
.text-link { display: inline-flex; align-items: center; gap: 12px; font-size: 14px; font-weight: 650; }
.text-link:hover { text-decoration: underline; text-underline-offset: 5px; }
.hero-note { display: flex; align-items: center; gap: 8px; margin-top: 22px; color: var(--muted); font-size: 12px; }
.status-dot { width: 5px; height: 5px; border-radius: 50%; background: #888f83; }
.hero-visual { position: relative; display: flex; align-items: center; justify-content: center; align-self: stretch; min-width: 0; padding: 0 0 20px 34px; }
.visual-ring { position: absolute; z-index: 0; width: 410px; height: 410px; border-radius: 50%; pointer-events: none; }
.ring-one { background: var(--yellow); width: 382px; height: 382px; right: -25px; top: 74px; }
.ring-two { border: 1px solid #e5e6d9; width: 490px; height: 490px; right: -73px; top: 18px; }
.phone-preview { position: relative; z-index: 1; width: 260px; max-width: 100%; padding: 8px; border: 1px solid #252825; background: #252825; border-radius: 31px; box-shadow: 0 26px 65px -25px rgb(39 44 29 / 34%), 0 0 0 3px rgb(255 255 255 / 70%); }
.phone-screen { overflow: hidden; border-radius: 23px; background: #fff; }
.phone-screen img { width: 100%; height: auto; min-height: 410px; object-fit: contain; }
.phone-preview figcaption { position: absolute; bottom: -39px; left: -20px; right: -20px; text-align: center; font-size: 11px; font-weight: 500; letter-spacing: .04em; color: var(--muted); }
.screen-caption { position: absolute; z-index: 2; top: 53px; left: -5px; display: flex; gap: 10px; align-items: center; font-size: 10px; line-height: 1.9; color: var(--muted); }
.screen-caption strong { color: var(--ink); font-weight: 650; }
.caption-line { width: 26px; height: 1px; background: #b5bcac; }
.visual-label { position: absolute; z-index: 2; right: -17px; bottom: 43px; display: flex; gap: 8px; align-items: center; padding: 12px 15px; border: 1px solid #e2e3d7; border-radius: 5px; background: rgb(255 255 255 / 95%); box-shadow: 0 6px 16px rgb(39 44 29 / 4%); font-size: 11px; }
.visual-label span { width: 7px; height: 7px; background: var(--yellow); }
.overview-strip { display: grid; grid-template-columns: repeat(3, 1fr); padding-block: 25px 28px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.overview-strip > div { display: flex; align-items: center; gap: 20px; padding-inline: 34px; border-right: 1px solid var(--line); }
.overview-strip > div:first-child { padding-left: 0; }
.overview-strip > div:last-child { padding-right: 0; border: 0; }
.overview-number { color: #858b80; font-size: 11px; font-variant-numeric: tabular-nums; letter-spacing: .08em; }
.overview-strip p { display: flex; flex-direction: column; gap: 3px; }
.overview-strip strong { font-size: 14px; font-weight: 650; }
.overview-strip p > span { color: var(--muted); font-size: 12px; }

.section { padding-block: 90px; }
.section-heading { display: flex; justify-content: space-between; align-items: end; gap: 32px; margin-bottom: 35px; }
.section-heading .eyebrow, .faq-heading .eyebrow { margin-bottom: 12px; color: var(--muted); }
h2 { font-size: clamp(27px, 3vw, 36px); line-height: 1.4; letter-spacing: -.045em; font-weight: 700; }
.section-heading > p { padding-bottom: 4px; font-size: 13px; line-height: 1.9; color: var(--muted); }
.feature-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.feature-card { display: flex; flex-direction: column; padding: 29px 28px 24px; background: var(--surface); border: 1px solid #eeefea; border-radius: 8px; }
.feature-icon { display: flex; align-items: center; justify-content: center; width: 46px; height: 46px; margin-bottom: 35px; background: var(--yellow); border-radius: 10px; }
.feature-icon svg { width: 28px; height: 28px; stroke: currentColor; stroke-width: 1.5; stroke-linejoin: round; stroke-linecap: round; }
h3 { font-size: 18px; line-height: 1.6; font-weight: 700; letter-spacing: -.02em; }
.feature-card > p { margin-top: 12px; margin-bottom: 26px; color: var(--muted); font-size: 13px; line-height: 1.9; }
.feature-detail { margin-top: auto; padding-top: 16px; border-top: 1px solid #e1e3dc; font-size: 11px; font-weight: 550; }
.source-panel { display: grid; grid-template-columns: 1fr 1fr; gap: 65px; margin-top: 28px; padding: 35px 40px; border: 1px solid var(--line); border-radius: 8px; }
.source-copy .eyebrow { margin-bottom: 7px; color: var(--muted); font-size: 10px; }
.source-copy h3 { font-size: 22px; }
.source-copy > p:last-child { margin-top: 10px; color: var(--muted); font-size: 12px; line-height: 1.95; }
.source-example { display: flex; flex-direction: column; justify-content: center; }
.source-row { display: flex; align-items: center; gap: 18px; margin-bottom: 12px; font-size: 11px; color: var(--muted); }
.authority-badge, .platform-badge { display: inline-flex; align-items: center; justify-content: center; flex: 0 0 112px; min-height: 31px; padding: 4px 10px; border-radius: 4px; color: var(--ink); font-size: 11px; font-weight: 650; }
.authority-badge { gap: 5px; background: var(--yellow-soft); border: 1px solid #ecd785; }
.authority-badge svg { width: 17px; height: 17px; fill: none; stroke: currentColor; stroke-width: 1.4; stroke-linecap: round; stroke-linejoin: round; }
.platform-badge { background: var(--surface); border: 1px solid var(--line); }
.source-example > p { margin-top: 6px; color: #71786e; font-size: 10px; line-height: 1.8; }

.workflow-section { background: var(--surface); border-block: 1px solid #eeefea; }
.workflow-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 28px; padding: 0; margin: 40px 0 0; list-style: none; }
.workflow-grid li { position: relative; padding-top: 25px; border-top: 1px solid #cfd4c8; }
.workflow-grid li::before { content: ""; position: absolute; top: -3px; left: 0; width: 5px; height: 5px; border-radius: 50%; background: #9da68e; }
.step-number { display: inline-block; margin-bottom: 15px; color: #737d67; font-size: 13px; font-variant-numeric: tabular-nums; letter-spacing: .06em; }
.workflow-grid h3 { font-size: 16px; }
.workflow-grid p { margin-top: 9px; color: var(--muted); font-size: 12px; line-height: 1.9; }
.workflow-note { margin-top: 36px; padding-top: 18px; border-top: 1px solid #e0e3da; color: var(--muted); font-size: 11px; }

.download-panel { display: grid; grid-template-columns: 1.1fr 1fr; align-items: center; gap: 72px; padding: 44px 48px; border-radius: 10px; background: var(--yellow-soft); border: 1px solid #f0e8c6; }
.download-intro > img { margin-bottom: 22px; border-radius: 15px; }
.download-intro .eyebrow { margin-bottom: 7px; font-size: 10px; }
.download-intro h2 { font-size: 30px; }
.download-intro > p:last-child { margin-top: 13px; font-size: 12px; line-height: 1.95; color: #665f45; }
.download-status { display: flex; align-items: center; justify-content: space-between; gap: 14px; padding: 20px 0; border-bottom: 1px solid #e5dbb7; }
.download-status:first-child { border-top: 1px solid #e5dbb7; }
.download-status > div { display: flex; align-items: center; gap: 16px; }
.platform-symbol { display: flex; align-items: center; justify-content: center; width: 42px; height: 42px; font-size: 17px; font-weight: 650; letter-spacing: -.04em; }
.android-symbol svg { width: 25px; height: 25px; stroke: var(--ink); stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round; }
.download-status strong { display: block; font-size: 14px; font-weight: 650; }
.download-status small { display: block; color: #766e52; font-size: 11px; }
.pending-badge { flex-shrink: 0; border: 1px solid #dcd1a7; border-radius: 4px; padding: 4px 9px; color: #6c6345; font-size: 10px; }
.download-status-list > p { margin-top: 15px; font-size: 10px; line-height: 1.8; color: #766e52; }

.faq-section { padding-top: 0; }
.faq-grid { display: grid; grid-template-columns: .7fr 1.3fr; gap: 90px; }
.faq-heading > p:last-child { margin-top: 18px; color: var(--muted); font-size: 12px; }
.faq-list { border-top: 1px solid var(--line); }
details { border-bottom: 1px solid var(--line); }
summary { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding-block: 20px; cursor: pointer; font-size: 14px; font-weight: 600; list-style: none; }
summary::-webkit-details-marker { display: none; }
summary span { flex: 0 0 24px; color: #747c6b; text-align: center; font-size: 23px; font-weight: 300; line-height: 1; transition: transform .15s ease; }
details[open] summary span { transform: rotate(45deg); }
details > p { padding: 0 30px 21px 0; color: var(--muted); font-size: 12px; line-height: 1.95; }

.site-footer { border-top: 1px solid var(--line); background: var(--surface); }
.footer-main { display: flex; align-items: center; gap: 24px; min-height: 116px; }
.footer-brand { font-size: 17px; gap: 11px; }
.footer-brand .brand-suffix { font-size: 14px; }
.footer-main > p { padding-left: 24px; border-left: 1px solid #daddd3; font-size: 11px; color: var(--muted); }
.footer-main nav { display: flex; gap: 25px; margin-left: auto; font-size: 11px; }
.site-footer a:hover { text-decoration: underline; text-underline-offset: 4px; }
.site-footer .brand:hover { text-decoration: none; }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; padding-block: 18px 22px; border-top: 1px solid #e1e4da; color: #707769; font-size: 10px; }

@media (min-width: 1500px) {
  .hero-grid { min-height: 690px; }
}

@media (max-width: 1020px) {
  .main-nav { gap: 23px; }
  .hero-grid { grid-template-columns: 1.1fr 1fr; gap: 25px; padding-block: 56px 66px; min-height: 620px; }
  h1 { font-size: 46px; }
  .hero-description { font-size: 14px; }
  .hero-visual { padding-left: 5px; }
  .phone-preview { width: 233px; }
  .ring-one { width: 310px; height: 310px; right: -36px; top: 100px; }
  .ring-two { width: 400px; height: 400px; right: -80px; top: 55px; }
  .screen-caption { display: none; }
  .visual-label { right: -7px; bottom: 38px; padding: 10px 12px; font-size: 10px; }
  .overview-strip > div { padding-inline: 20px; gap: 14px; }
  .overview-strip p > span { font-size: 10px; }
  .feature-card { padding: 24px 21px 21px; }
  .feature-card h3 { font-size: 16px; }
  .source-panel { gap: 35px; padding: 30px; }
  .download-panel { gap: 32px; padding: 35px; }
  .faq-grid { gap: 50px; }
}

@media (max-width: 760px) {
  html { scroll-padding-top: 118px; }
  .container { width: calc(100% - 40px); }
  .header-inner { flex-wrap: wrap; justify-content: center; gap: 9px; padding-block: 14px 9px; min-height: 106px; }
  .brand { font-size: 18px; gap: 10px; }
  .brand img { width: 34px; height: 34px; border-radius: 8px; }
  .brand-suffix { font-size: 15px; }
  .main-nav { justify-content: center; gap: 25px; width: 100%; font-size: 12px; }
  .main-nav a { padding-block: 3px; }
  .hero-grid { grid-template-columns: 1fr; gap: 38px; min-height: auto; padding-block: 44px 62px; }
  .hero-copy { text-align: center; }
  .hero-copy .eyebrow { justify-content: center; font-size: 10px; margin-bottom: 18px; }
  h1 { font-size: clamp(34px, 7vw, 48px); letter-spacing: -.06em; }
  .hero-description { max-width: 460px; margin: 22px auto 0; font-size: 13px; }
  .hero-actions { justify-content: center; margin-top: 26px; gap: 26px; }
  .button { min-height: 47px; padding: 11px 18px; font-size: 12px; gap: 22px; }
  .text-link { font-size: 12px; }
  .hero-note { justify-content: center; font-size: 10px; margin-top: 17px; }
  .hero-visual { min-height: 475px; padding: 0; }
  .phone-preview { width: 222px; border-radius: 28px; padding: 7px; }
  .phone-screen { border-radius: 20px; }
  .phone-screen img { min-height: 0; }
  .phone-preview figcaption { bottom: -30px; font-size: 10px; }
  .ring-one { width: 300px; height: 300px; left: 50%; right: auto; top: 80px; transform: translateX(-50%); }
  .ring-two { width: 382px; height: 382px; left: 50%; right: auto; top: 39px; transform: translateX(-50%); }
  .visual-label { bottom: 35px; right: max(0px, calc(50% - 177px)); }
  .overview-strip { padding-block: 21px; }
  .overview-strip > div { justify-content: center; gap: 0; padding-inline: 12px; text-align: center; }
  .overview-strip > div:first-child { padding-left: 0; }
  .overview-strip > div:last-child { padding-right: 0; }
  .overview-number { display: none; }
  .overview-strip strong { font-size: 13px; }
  .overview-strip p > span { font-size: 9px; line-height: 1.6; }
  .section { padding-block: 58px; }
  .section-heading { display: block; margin-bottom: 26px; }
  .section-heading .eyebrow, .faq-heading .eyebrow { font-size: 10px; margin-bottom: 9px; }
  h2 { font-size: 28px; }
  .section-heading > p { margin-top: 14px; font-size: 12px; }
  .desktop-break { display: none; }
  .feature-grid { grid-template-columns: 1fr; gap: 14px; }
  .feature-card { padding: 25px; }
  .feature-icon { margin-bottom: 22px; width: 42px; height: 42px; }
  .feature-card h3 { font-size: 18px; }
  .feature-card > p { margin-bottom: 22px; font-size: 12px; }
  .feature-detail { font-size: 10px; }
  .source-panel { grid-template-columns: 1fr; gap: 25px; margin-top: 20px; padding: 26px; }
  .source-copy h3 { font-size: 22px; }
  .source-row { gap: 14px; font-size: 10px; }
  .workflow-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 29px 24px; margin-top: 29px; }
  .workflow-grid li { padding-top: 17px; }
  .step-number { margin-bottom: 10px; font-size: 12px; }
  .workflow-grid h3 { font-size: 16px; }
  .workflow-grid p { font-size: 11px; }
  .workflow-note { font-size: 10px; margin-top: 25px; }
  .download-panel { grid-template-columns: 1fr; gap: 25px; padding: 28px; }
  .download-intro > img { width: 56px; height: 56px; border-radius: 12px; }
  .download-intro h2 { font-size: 27px; }
  .download-intro > p:last-child { font-size: 11px; }
  .download-status { padding-block: 17px; }
  .download-status > div { gap: 9px; }
  .download-status strong { font-size: 13px; }
  .faq-section { padding-top: 0; }
  .faq-grid { grid-template-columns: 1fr; gap: 28px; }
  .faq-heading h2 br { display: none; }
  .faq-heading > p:last-child { margin-top: 12px; }
  summary { padding-block: 18px; font-size: 12px; gap: 10px; }
  details > p { font-size: 11px; padding-right: 16px; }
  .footer-main { flex-wrap: wrap; justify-content: space-between; column-gap: 14px; row-gap: 17px; padding-block: 28px; min-height: 0; }
  .footer-brand { font-size: 16px; }
  .footer-brand .brand-suffix { font-size: 13px; }
  .footer-main > p { order: 3; width: 100%; border: 0; padding: 0; font-size: 10px; }
  .footer-main nav { margin-left: 0; gap: 18px; font-size: 10px; }
  .footer-bottom { font-size: 9px; }
}

@media (max-width: 380px) {
  .container { width: calc(100% - 32px); }
  .main-nav { gap: 20px; font-size: 11px; }
  .hero-copy .eyebrow { letter-spacing: .08em; font-size: 9px; }
  .hero-actions { gap: 21px; }
  .hero-visual { min-height: 460px; }
  .phone-preview { width: 210px; }
  .visual-label { right: 0; }
  .overview-strip p > span { max-width: 88px; font-size: 9px; }
  .source-panel { padding: 22px; }
  .source-row { gap: 10px; flex-wrap: wrap; }
  .download-panel { padding: 24px; }
  .platform-symbol { width: 31px; }
  .pending-badge { font-size: 9px; padding-inline: 7px; }
  .footer-main nav { gap: 14px; }
}

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