:root {
  --paper: #f4edda;
  --paper-light: #fffaf0;
  --ink: #183a32;
  --muted: #617069;
  --line: #d7c8a6;
  --vermillion: #d65f3d;
  --jade: #2e6a5c;
  --sky: #8eb9bd;
  --sun: #e8b95e;
  --shadow: rgba(44, 48, 31, 0.14);
  --serif: "Songti SC", "STSong", "Noto Serif CJK SC", Georgia, serif;
  --sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 10% 6%, rgba(232, 185, 94, 0.22), transparent 28rem),
    linear-gradient(90deg, rgba(90, 72, 40, 0.035) 1px, transparent 1px),
    var(--paper);
  background-size: auto, 28px 28px, auto;
  font: 16px/1.75 var(--sans);
  text-rendering: optimizeLegibility;
}

a { color: inherit; }
a:focus-visible, button:focus-visible { outline: 3px solid var(--sun); outline-offset: 4px; }
.skip-link { position: fixed; top: -100px; left: 1rem; z-index: 20; padding: .65rem 1rem; background: var(--ink); color: white; }
.skip-link:focus { top: 1rem; }

.shell { width: min(1180px, calc(100% - 40px)); margin: 0 auto; }
.site-header { position: sticky; top: 0; z-index: 10; border-bottom: 1px solid rgba(112, 95, 63, .18); background: rgba(244, 237, 218, .88); backdrop-filter: blur(18px); }
.nav { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 1.5rem; }
.brand { display: inline-flex; align-items: center; gap: .72rem; text-decoration: none; font-family: var(--serif); font-weight: 700; letter-spacing: .08em; }
.brand-logo { display: block; width: 42px; height: 42px; object-fit: contain; border-radius: 12px; box-shadow: 0 5px 14px rgba(44, 48, 31, .15); }
.brand-wordmark { display: grid; gap: .08rem; line-height: 1; }
.brand-wordmark small { color: var(--muted); font: 600 .58rem/1 var(--sans); letter-spacing: .16em; }
.brand-mark { display: grid; place-items: center; width: 38px; height: 38px; border-radius: 50% 44% 50% 42%; color: var(--paper-light); background: var(--vermillion); box-shadow: inset 0 0 0 2px rgba(255,255,255,.35); transform: rotate(-4deg); }
.nav-links { display: flex; align-items: center; gap: 1.4rem; }
.nav-links a { color: var(--muted); text-decoration: none; font-size: .92rem; }
.nav-links a:hover { color: var(--ink); }
.nav-links .nav-action { padding: .5rem .95rem; border: 1px solid var(--ink); border-radius: 999px; color: var(--ink); }

.hero { min-height: 760px; display: grid; grid-template-columns: 1.02fr .98fr; align-items: center; gap: clamp(2rem, 6vw, 6rem); padding: 7rem 0 5rem; }
.eyebrow { margin: 0 0 1.2rem; color: var(--vermillion); font-size: .78rem; font-weight: 800; letter-spacing: .2em; text-transform: uppercase; }
h1, h2, h3 { font-family: var(--serif); line-height: 1.15; }
h1 { margin: 0; max-width: 8.5em; font-size: clamp(3.4rem, 7vw, 6.7rem); font-weight: 700; letter-spacing: -.06em; }
.hero-copy { max-width: 39rem; }
.lead { max-width: 36rem; margin: 1.7rem 0 0; color: var(--muted); font-size: clamp(1.05rem, 1.8vw, 1.28rem); }
.actions { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: 2.1rem; }
.button { display: inline-flex; justify-content: center; align-items: center; min-height: 48px; padding: .7rem 1.25rem; border-radius: 999px; text-decoration: none; font-weight: 700; transition: transform .2s ease, box-shadow .2s ease; }
.button:hover { transform: translateY(-2px); }
.button-primary { color: #fff; background: var(--jade); box-shadow: 0 10px 25px rgba(31, 83, 70, .18); }
.button-secondary { border: 1px solid var(--line); background: rgba(255,250,240,.58); }

.hero-art { display: grid; gap: 1.2rem; }
.hero-logo-card { display: grid; grid-template-columns: 132px 1fr; align-items: center; gap: 1.5rem; padding: 1.2rem 1.35rem; border: 1px solid rgba(98,75,42,.2); border-radius: 24px; background: rgba(255,250,240,.72); box-shadow: 0 18px 45px rgba(62,50,27,.1); }
.hero-logo-card img { display: block; width: 132px; height: 132px; object-fit: contain; border-radius: 24px; }
.hero-logo-card strong { display: block; font: 700 clamp(1.6rem, 3vw, 2.4rem)/1.2 var(--serif); }
.hero-logo-card p { margin: .45rem 0 0; color: var(--muted); font-size: .92rem; }
.app-shot-stage { position: relative; padding: 1.05rem; border: 1px solid rgba(98,75,42,.23); border-radius: 32px; background: rgba(255,250,240,.72); box-shadow: 0 34px 80px var(--shadow); transform: rotate(1.1deg); }
.app-shot-stage::after { content: ""; position: absolute; inset: 1.05rem; pointer-events: none; border: 1px solid rgba(255,255,255,.42); border-radius: 22px; }
.app-shot-stage img { display: block; width: 100%; height: auto; aspect-ratio: 4 / 3; object-fit: cover; border-radius: 22px; background: #111; }
.app-shot-label { position: absolute; z-index: 2; top: -1.1rem; right: 1.2rem; display: grid; min-width: 180px; padding: .7rem 1rem; border-radius: 14px; color: var(--paper-light); background: var(--ink); box-shadow: 0 12px 28px rgba(24,58,50,.2); transform: rotate(-2deg); }
.app-shot-label span { font-weight: 700; }
.app-shot-label small { color: rgba(255,250,240,.68); }

.metrics { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.metric { padding: 2rem 1.3rem; text-align: center; }
.metric + .metric { border-left: 1px solid var(--line); }
.metric strong { display: block; font: 700 clamp(2rem, 4vw, 3.4rem)/1 var(--serif); color: var(--jade); }
.metric span { display: block; margin-top: .55rem; color: var(--muted); font-size: .86rem; }

.section { padding: 7rem 0; }
.section-heading { display: grid; grid-template-columns: .7fr 1.3fr; gap: 3rem; margin-bottom: 3.5rem; }
.section-heading h2 { margin: 0; font-size: clamp(2.4rem, 5vw, 4.7rem); letter-spacing: -.04em; }
.section-heading p { max-width: 38rem; margin: .6rem 0 0 auto; color: var(--muted); font-size: 1.05rem; }
.feature-ribbon { display: grid; grid-template-columns: repeat(4, 1fr); border: 1px solid var(--line); border-radius: 28px; overflow: hidden; background: rgba(255,250,240,.52); }
.feature { min-height: 280px; padding: 2rem 1.5rem; position: relative; }
.feature + .feature { border-left: 1px solid var(--line); }
.feature-num { color: var(--vermillion); font: italic 1rem var(--serif); }
.feature h3 { margin: 5rem 0 .7rem; font-size: 1.45rem; }
.feature p { margin: 0; color: var(--muted); font-size: .93rem; }

.split { display: grid; grid-template-columns: 1fr 1fr; gap: 1.2rem; }
.panel { position: relative; min-height: 390px; padding: clamp(2rem, 5vw, 4rem); border-radius: 32px; overflow: hidden; }
.panel h2 { max-width: 9em; margin: 0; font-size: clamp(2.4rem, 4.5vw, 4rem); }
.panel p { max-width: 32rem; }
.panel-dark { color: #f8f1df; background: var(--ink); }
.panel-warm { background: #e9c982; }
.membership-copy { margin: 2rem 0; padding: 1rem 1.2rem; border-left: 3px solid var(--vermillion); background: rgba(255,255,255,.42); }
.panel-dark .mini-list { color: rgba(248,241,223,.75); }
.mini-list { list-style: none; margin: 2rem 0 0; padding: 0; }
.mini-list li { padding: .6rem 0; border-bottom: 1px solid rgba(255,255,255,.18); }

.review-callout { display: grid; grid-template-columns: 1.15fr .85fr; gap: 3rem; align-items: end; padding: clamp(2rem, 5vw, 4.5rem); border: 1px solid var(--line); border-radius: 36px; background: var(--paper-light); box-shadow: 0 25px 70px rgba(62,50,27,.08); }
.review-callout h2 { margin: 0; font-size: clamp(2.5rem, 5vw, 4.5rem); }
.review-callout p { color: var(--muted); }
.review-links { display: grid; gap: .75rem; }
.review-links a { display: flex; justify-content: space-between; padding: .9rem 0; border-bottom: 1px solid var(--line); text-decoration: none; font-weight: 700; }
.review-links a::after { content: "↗"; color: var(--vermillion); }

.site-footer { margin-top: 6rem; padding: 3.5rem 0; color: #e8e0cd; background: var(--ink); }
.footer-grid { display: grid; grid-template-columns: 1.3fr .7fr .7fr; gap: 3rem; }
.footer-title { font: 700 1.8rem var(--serif); }
.footer-note { max-width: 32rem; color: rgba(232,224,205,.7); }
.footer-links { display: grid; align-content: start; gap: .45rem; }
.footer-links strong { margin-bottom: .45rem; color: var(--sun); font-size: .78rem; letter-spacing: .14em; }
.footer-links a { color: rgba(232,224,205,.78); text-decoration: none; }
.copyright { margin-top: 3rem; padding-top: 1.5rem; border-top: 1px solid rgba(255,255,255,.15); color: rgba(232,224,205,.55); font-size: .82rem; }

.page-hero { padding: 6rem 0 3rem; border-bottom: 1px solid var(--line); }
.page-hero h1 { max-width: 13em; font-size: clamp(3rem, 7vw, 6rem); }
.page-lead { max-width: 48rem; color: var(--muted); font-size: 1.12rem; }
.prose { width: min(820px, calc(100% - 40px)); margin: 0 auto; padding: 4rem 0 7rem; }
.prose h2 { margin: 3rem 0 .8rem; font-size: 2rem; }
.prose h3 { margin: 2rem 0 .5rem; font-size: 1.25rem; }
.prose p, .prose li { color: #40544e; }
.prose a { color: var(--jade); }
.facts { display: grid; grid-template-columns: repeat(2, 1fr); margin: 2rem 0; border: 1px solid var(--line); border-radius: 22px; overflow: hidden; }
.fact { padding: 1.25rem 1.4rem; background: rgba(255,250,240,.55); }
.fact:nth-child(even) { border-left: 1px solid var(--line); }
.fact:nth-child(n+3) { border-top: 1px solid var(--line); }
.fact small { display: block; color: var(--muted); }
.fact strong { display: block; margin-top: .2rem; font-family: var(--serif); font-size: 1.08rem; }
.status { display: inline-flex; gap: .5rem; align-items: center; padding: .32rem .7rem; border-radius: 999px; background: #dfeadf; color: #285849; font-size: .78rem; font-weight: 700; }
.status::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: #3d876c; }
.notice { margin: 2rem 0; padding: 1.2rem 1.4rem; border: 1px solid #d5b56f; border-radius: 18px; background: rgba(232,185,94,.18); }
.review-intro { display: grid; grid-template-columns: 1.2fr .8fr; gap: 1.5rem; align-items: center; margin: 2rem 0 3rem; padding: 1.35rem; border: 1px solid var(--line); border-radius: 26px; background: rgba(255,250,240,.6); }
.review-intro-copy strong { display: block; font: 700 1.55rem/1.2 var(--serif); }
.review-intro-copy p { margin: .45rem 0 0; color: var(--muted); }
.review-intro-logo { justify-self: end; display: flex; align-items: center; gap: .75rem; color: var(--jade); font-weight: 700; }
.review-intro-logo img { width: 64px; height: 64px; border-radius: 16px; box-shadow: 0 8px 18px rgba(44,48,31,.14); }
.process-strip { display: grid; grid-template-columns: repeat(4, 1fr); gap: .7rem; margin: 1.5rem 0 3rem; }
.process-step { position: relative; min-height: 150px; padding: 1rem 1.05rem; border: 1px solid var(--line); border-radius: 18px; background: var(--paper-light); }
.process-step::after { content: "→"; position: absolute; top: 50%; right: -.62rem; z-index: 2; color: var(--vermillion); font-size: 1.35rem; transform: translateY(-50%); }
.process-step:last-child::after { display: none; }
.process-step small { color: var(--vermillion); font-weight: 800; letter-spacing: .14em; }
.process-step strong { display: block; margin-top: .6rem; font: 700 1.18rem/1.25 var(--serif); }
.process-step span { display: block; margin-top: .35rem; color: var(--muted); font-size: .82rem; line-height: 1.5; }
.flow-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.2rem; margin: 1.4rem 0 3rem; }
.flow-card { overflow: hidden; border: 1px solid var(--line); border-radius: 24px; background: var(--paper-light); box-shadow: 0 15px 38px rgba(62,50,27,.07); }
.flow-card figure { margin: 0; background: #f1ead7; }
.flow-card img { display: block; width: 100%; height: auto; aspect-ratio: 16 / 9; object-fit: cover; object-position: center; }
.flow-card-body { padding: 1.25rem 1.35rem 1.4rem; }
.flow-card-body h3 { margin: 0; font-size: 1.45rem; }
.flow-card-body p { margin: .5rem 0 0; color: var(--muted); font-size: .92rem; }
.flow-detail { display: grid; grid-template-columns: 1fr 1fr; gap: .75rem; margin: 1rem 0 0; padding: 0; list-style: none; }
.flow-detail li { padding: .65rem .75rem; border-radius: 12px; color: #40544e; background: rgba(232,185,94,.12); font-size: .82rem; line-height: 1.5; }
.flow-detail strong { display: block; color: var(--ink); font-size: .76rem; letter-spacing: .08em; }
.flow-note { margin: -1.5rem 0 3rem; padding: 1rem 1.2rem; border-left: 3px solid var(--jade); color: var(--muted); background: rgba(223,234,223,.52); }
.account-card { width: min(760px, calc(100% - 40px)); margin: 6rem auto; padding: clamp(2rem, 6vw, 4.5rem); border: 1px solid var(--line); border-radius: 36px; background: var(--paper-light); box-shadow: 0 30px 80px var(--shadow); }
.account-card h1 { font-size: clamp(2.8rem, 7vw, 5rem); }
.account-card .button[aria-disabled="true"] { opacity: .62; cursor: not-allowed; }
.account-foot { margin-top: 2rem; color: var(--muted); font-size: .88rem; }
.account-layout { margin-top: 2.2rem; }
.account-panel { padding: clamp(1.4rem, 4vw, 2.6rem); border: 1px solid var(--line); border-radius: 26px; background: rgba(255,250,240,.74); box-shadow: 0 18px 48px rgba(62,50,27,.08); }
.account-panel h2 { margin: 0; font-size: clamp(2rem, 5vw, 3.5rem); }
.panel-copy, .panel-foot, .muted { color: var(--muted); }
.account-tabs { display: flex; gap: .3rem; margin: 1.5rem 0 1rem; border-bottom: 1px solid var(--line); }
.account-tabs button { border: 0; padding: .7rem 1rem; color: var(--muted); background: transparent; font: inherit; cursor: pointer; }
.account-tabs button.active { color: var(--ink); border-bottom: 3px solid var(--vermillion); font-weight: 700; }
.account-form { display: grid; gap: .85rem; }
.account-form label { display: grid; gap: .35rem; font-weight: 700; font-size: .9rem; }
.account-form input { width: 100%; min-height: 44px; padding: .65rem .75rem; border: 1px solid var(--line); border-radius: 12px; color: var(--ink); background: #fffdf7; font: inherit; }
.inline-field { display: grid; grid-template-columns: 1fr auto; gap: .5rem; }
.inline-field button { border: 1px solid var(--line); border-radius: 12px; padding: 0 .8rem; background: var(--paper); color: var(--ink); cursor: pointer; }
.wechat-web-button { width: 100%; min-height: 52px; border: 1px solid #4b9a70; border-radius: 14px; color: #fff; background: #2f8a5d; font: 700 1rem var(--sans); cursor: pointer; }
.web-qr-login { display: grid; justify-items: center; gap: .45rem; margin: 1rem 0; padding: 1rem; border: 1px solid var(--line); border-radius: 18px; background: #fffdf7; text-align: center; }
.web-qr-login iframe { width: 300px; height: 360px; max-width: 100%; border: 0; background: #fff; }
.web-qr-login p, .web-qr-login a { margin: 0; color: var(--muted); font-size: .88rem; }
.text-action { border: 0; color: var(--jade); background: transparent; cursor: pointer; }
.or { display: flex; align-items: center; gap: .75rem; margin: 1rem 0; color: var(--muted); font-size: .84rem; }
.or::before, .or::after { content: ""; flex: 1; height: 1px; background: var(--line); }
.account-notice { margin: 1rem 0; padding: .8rem 1rem; border-radius: 12px; background: rgba(232,185,94,.2); }
.account-notice.error { color: #9a3926; background: #f7ddd4; }
.account-notice.success, .success-line { color: #285849; background: #dfeadf; }
.profile-line { display: flex; gap: 1rem; align-items: center; margin-bottom: 1rem; }
.profile-line h2 { font-size: clamp(1.8rem, 4vw, 2.8rem); }
.profile-line p { margin: .2rem 0 0; color: var(--muted); }
.account-section { margin-top: 1.3rem; padding-top: 1.3rem; border-top: 1px solid var(--line); }
.section-title { display: flex; align-items: center; justify-content: space-between; gap: .8rem; }
.section-title h3 { margin: 0; font-size: 1.35rem; }
.web-price { display: grid; grid-template-columns: 1fr 1fr auto; gap: 1rem; align-items: end; margin-top: 1rem; }
.web-price small, .web-price del { display: block; color: var(--muted); }
.web-price strong { display: block; color: var(--jade); font: 700 2rem var(--serif); }
.payment-box { display: flex; align-items: center; gap: 1.3rem; margin-top: 1rem; padding: 1rem; border-radius: 18px; background: #f0ead8; }
.payment-box canvas { width: 240px; height: 240px; max-width: 48%; border-radius: 10px; background: #fff; }
.payment-box p { margin: .35rem 0 .8rem; color: var(--muted); font-size: .9rem; }
.invite-code { display: inline-block; margin: .6rem 0; padding: .45rem .8rem; border-radius: 10px; color: var(--jade); background: #dfeadf; font: 700 1.25rem var(--sans); letter-spacing: .18em; }
.device-list { display: grid; gap: .5rem; margin: .75rem 0 0; padding: 0; list-style: none; }
.device-list li { display: flex; justify-content: space-between; gap: 1rem; padding: .75rem 0; border-bottom: 1px solid var(--line); }
.device-list small { display: block; color: var(--muted); }
.link { border: 0; padding: 0; color: var(--jade); background: transparent; cursor: pointer; font: inherit; }
.danger { color: #a44a39; }
.account-actions { display: flex; flex-wrap: wrap; gap: 1rem; margin-top: 1.5rem; padding-top: 1rem; border-top: 1px solid var(--line); color: var(--muted); font-size: .9rem; }

[data-reveal] { opacity: 1; transform: none; }
.js [data-reveal] { opacity: 0; transform: translateY(16px); transition: opacity .7s ease, transform .7s ease; }
.js [data-reveal].visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } .js [data-reveal] { opacity: 1; transform: none; transition: none; } .button { transition: none; } }

@media (max-width: 840px) {
  .nav-links a:not(.nav-action) { display: none; }
  .hero { min-height: auto; grid-template-columns: 1fr; padding-top: 4.5rem; }
  .hero-copy { order: 1; }
  .app-shot-stage { order: 2; }
  .metrics { grid-template-columns: 1fr; }
  .metric + .metric { border-left: 0; border-top: 1px solid var(--line); }
  .section-heading, .split, .review-callout, .footer-grid, .review-intro { grid-template-columns: 1fr; }
  .review-intro-logo { justify-self: start; }
  .flow-grid { grid-template-columns: 1fr; }
  .section-heading p { margin-left: 0; }
  .feature-ribbon { grid-template-columns: 1fr 1fr; }
  .feature:nth-child(3) { border-left: 0; }
  .feature:nth-child(n+3) { border-top: 1px solid var(--line); }
}

@media (max-width: 520px) {
  .shell { width: min(100% - 28px, 1180px); }
  .nav { min-height: 64px; }
  .brand-logo { width: 36px; height: 36px; border-radius: 10px; }
  .hero { padding-top: 3rem; }
  h1 { font-size: 3.2rem; }
  .app-shot-stage { padding: .6rem; border-radius: 22px; }
  .app-shot-stage img { border-radius: 16px; }
  .app-shot-stage::after { inset: .6rem; border-radius: 16px; }
  .app-shot-label { top: -.8rem; right: .8rem; min-width: 150px; padding: .55rem .75rem; }
  .feature-ribbon, .facts, .process-strip { grid-template-columns: 1fr; }
  .process-step::after { content: "↓"; top: auto; right: 50%; bottom: -.85rem; transform: translateX(50%); }
  .process-step:last-child::after { display: none; }
  .hero-logo-card { grid-template-columns: 88px 1fr; gap: 1rem; }
  .hero-logo-card img { width: 88px; height: 88px; border-radius: 18px; }
  .flow-detail { grid-template-columns: 1fr; }
  .feature + .feature, .feature:nth-child(3), .fact:nth-child(even) { border-left: 0; }
  .feature + .feature, .fact:nth-child(n+2) { border-top: 1px solid var(--line); }
  .feature { min-height: 235px; }
  .feature h3 { margin-top: 3rem; }
  .section { padding: 5rem 0; }
  .web-price { grid-template-columns: 1fr 1fr; }
  .web-price button { grid-column: 1 / -1; }
  .payment-box { align-items: flex-start; flex-direction: column; }
  .payment-box canvas { max-width: 240px; }
}

/* Hide scrollbar chrome everywhere while retaining native scrolling. */
*, *::before, *::after {
  scrollbar-width: none !important;
  -ms-overflow-style: none !important;
}
*::-webkit-scrollbar {
  display: none !important;
  width: 0 !important;
  height: 0 !important;
}