:root {
  --ink: #1f2a23;
  --muted: #69736c;
  --paper: #f6f1e7;
  --paper-deep: #ece4d5;
  --card: #fffdf8;
  --line: rgba(31, 42, 35, .13);
  --green: #537663;
  --green-deep: #2f5141;
  --green-soft: #d9e5da;
  --amber: #d99a45;
  --orange: #e87345;
  --shadow: 0 24px 80px rgba(44, 52, 45, .14);
  --radius: 28px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: "PingFang SC", "Microsoft YaHei", system-ui, sans-serif; -webkit-font-smoothing: antialiased; }
body::before { content: ""; position: fixed; inset: 0; pointer-events: none; opacity: .2; background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.8' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.18'/%3E%3C/svg%3E"); z-index: 99; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }
img { display: block; max-width: 100%; }
.skip-link { position: fixed; left: 16px; top: -60px; z-index: 120; background: #fff; padding: 12px 18px; border-radius: 10px; }
.skip-link:focus { top: 16px; }
.section-shell { width: min(1180px, calc(100% - 48px)); margin-inline: auto; }
.section { padding: 120px 0; }

.site-header { position: sticky; top: 0; z-index: 50; padding: 18px 0; transition: .25s ease; }
.site-header.scrolled { background: rgba(246, 241, 231, .86); border-bottom: 1px solid var(--line); backdrop-filter: blur(18px); padding: 10px 0; }
.nav-shell { width: min(1240px, calc(100% - 32px)); margin: auto; min-height: 60px; display: flex; align-items: center; justify-content: space-between; gap: 28px; padding: 8px 12px 8px 18px; border: 1px solid rgba(31, 42, 35, .1); border-radius: 18px; background: rgba(255, 253, 248, .65); box-shadow: 0 8px 32px rgba(52, 57, 51, .06); }
.site-header.scrolled .nav-shell { border-color: transparent; background: transparent; box-shadow: none; }
.brand { display: inline-flex; align-items: center; gap: 11px; font-weight: 800; letter-spacing: .04em; white-space: nowrap; }
.brand-mark { width: 38px; height: 38px; display: grid; place-items: center; border-radius: 12px; color: #fff; background: var(--green-deep); }
.brand-mark svg { width: 26px; fill: none; stroke: currentColor; stroke-width: 2.2; stroke-linecap: round; stroke-linejoin: round; }
.brand-mark.small { width: 32px; height: 32px; font-size: 14px; }
.site-nav { display: flex; align-items: center; gap: 30px; color: #4b574f; font-size: 14px; }
.site-nav a { position: relative; }
.site-nav a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: -6px; height: 1px; background: var(--ink); transition: right .2s ease; }
.site-nav a:hover::after { right: 0; }
.nav-toggle { display: none; width: 42px; height: 42px; border: 0; background: transparent; }
.nav-toggle span { display: block; width: 22px; height: 2px; margin: 6px auto; background: var(--ink); transition: .25s; }

.button { min-height: 52px; display: inline-flex; align-items: center; justify-content: center; gap: 14px; border: 1px solid transparent; border-radius: 999px; padding: 0 24px; cursor: pointer; transition: transform .2s ease, box-shadow .2s ease, background .2s ease; font-weight: 700; }
.button:hover { transform: translateY(-2px); }
.button-primary { color: #fff; background: var(--green-deep); box-shadow: 0 14px 30px rgba(47, 81, 65, .24); }
.button-ghost { color: var(--ink); background: transparent; border-color: var(--line); }
.button-dark { color: #fff; background: var(--ink); }
.button-light { color: var(--green-deep); background: #fffaf0; min-width: 190px; }
.button-small { min-height: 42px; padding: 0 18px; font-size: 13px; }

.hero { min-height: 760px; display: grid; grid-template-columns: 1.02fr .98fr; align-items: center; gap: 80px; padding: 72px 0 110px; }
.eyebrow { display: flex; align-items: center; gap: 10px; color: var(--green-deep); font-size: 13px; font-weight: 800; letter-spacing: .16em; text-transform: uppercase; }
.eyebrow span { width: 26px; height: 1px; background: currentColor; }
.hero h1, .section-heading h2, .privacy-copy h2, .cta-section h2 { margin: 24px 0; font-family: "STKaiti", "KaiTi", "Songti SC", serif; font-weight: 700; letter-spacing: -.045em; line-height: 1.08; }
.hero h1 { font-size: clamp(48px, 5.4vw, 78px); }
.hero h1 em { color: var(--orange); font-style: normal; }
.hero-lead { max-width: 620px; color: var(--muted); font-size: 18px; line-height: 1.9; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin: 34px 0 30px; }
.trust-list { display: flex; flex-wrap: wrap; gap: 24px; margin: 0; padding: 0; list-style: none; color: #556159; font-size: 14px; }
.trust-list span { display: inline-grid; place-items: center; width: 20px; height: 20px; margin-right: 6px; color: #fff; background: var(--green); border-radius: 50%; font-size: 11px; }
.hero-visual { position: relative; min-height: 610px; display: grid; place-items: center; }
.phone { position: relative; overflow: hidden; padding: 10px; border: 2px solid #28352e; border-radius: 44px; background: #1d2722; box-shadow: var(--shadow); }
.phone::after { content: ""; position: absolute; inset: 10px; pointer-events: none; border: 1px solid rgba(255,255,255,.22); border-radius: 34px; }
.phone img { width: 100%; height: 100%; object-fit: contain; border-radius: 34px; background: #f7f8fb; }
.phone-speaker { position: absolute; z-index: 2; left: 50%; top: 16px; width: 72px; height: 18px; transform: translateX(-50%); border-radius: 0 0 14px 14px; background: #1d2722; }
.phone-hero { z-index: 2; width: min(286px, 68vw); height: 610px; transform: rotate(3deg); }
.orb { position: absolute; border-radius: 50%; filter: blur(1px); }
.orb-one { width: 440px; height: 440px; background: var(--green-soft); }
.orb-two { width: 280px; height: 280px; right: 0; bottom: 20px; background: #efd8b5; opacity: .8; }
.note-card { position: absolute; z-index: 4; min-width: 180px; padding: 16px 20px; border: 1px solid rgba(255,255,255,.9); border-radius: 18px; background: rgba(255, 253, 248, .92); box-shadow: 0 16px 45px rgba(42, 50, 45, .14); backdrop-filter: blur(12px); }
.note-card strong, .note-card span { display: block; }
.note-card span { margin-top: 4px; color: var(--muted); font-size: 12px; }
.note-card-top { left: 0; top: 105px; transform: rotate(-4deg); }
.note-card-bottom { right: -8px; bottom: 88px; display: flex; align-items: center; gap: 12px; transform: rotate(3deg); }
.note-card-bottom .check { display: grid; place-items: center; width: 34px; height: 34px; margin: 0; border-radius: 50%; color: #fff; background: var(--orange); }

.proof-strip { overflow: hidden; color: #f9f5ec; background: var(--green-deep); transform: rotate(-1deg); transform-origin: center; }
.proof-track { width: max-content; display: flex; align-items: center; gap: 28px; padding: 18px 0; font: 700 17px/1 "STKaiti", "KaiTi", serif; letter-spacing: .12em; animation: drift 24s linear infinite; }
.proof-track span { min-width: 130px; text-align: center; }
.proof-track i { color: #f0c787; font-style: normal; }
@keyframes drift { to { transform: translateX(-25%); } }

.section-heading { max-width: 720px; margin-bottom: 58px; }
.section-heading.centered { margin-inline: auto; text-align: center; }
.section-heading.centered .eyebrow { justify-content: center; }
.section-heading h2, .privacy-copy h2 { font-size: clamp(42px, 4.5vw, 66px); }
.section-heading p, .privacy-copy > p { color: var(--muted); font-size: 17px; line-height: 1.9; }
.compare-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.compare-card { min-height: 420px; position: relative; overflow: hidden; padding: 42px; border-radius: var(--radius); border: 1px solid var(--line); }
.compare-card.old { background: #ece8df; }
.compare-card.new { color: #f8f4ec; background: var(--green-deep); }
.card-index { color: var(--muted); font-size: 12px; font-weight: 800; letter-spacing: .14em; }
.new .card-index { color: #c7d6cb; }
.compare-card h3 { margin: 50px 0 28px; font: 700 36px/1.28 "STKaiti", "KaiTi", serif; }
.compare-card p { max-width: 480px; margin-top: 32px; color: var(--muted); line-height: 1.8; }
.new p { color: #cbd7cf; }
.scatter { height: 92px; position: relative; }
.scatter span { position: absolute; padding: 10px 16px; border: 1px solid rgba(31,42,35,.16); border-radius: 999px; color: #687169; background: rgba(255,255,255,.5); }
.scatter span:nth-child(1) { left: 0; top: 0; transform: rotate(-5deg); }.scatter span:nth-child(2) { left: 30%; top: 40px; transform: rotate(4deg); }.scatter span:nth-child(3) { right: 8%; top: 0; transform: rotate(-2deg); }.scatter span:nth-child(4) { right: 0; bottom: 0; transform: rotate(6deg); }
.flow-line { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.flow-line span { display: grid; place-items: center; width: 74px; aspect-ratio: 1; border: 1px solid rgba(255,255,255,.35); border-radius: 50%; font-weight: 700; }
.flow-line b { color: #eac88e; font-weight: 400; }

.feature-section { background: #eae4d8; }
.feature-showcase { display: grid; grid-template-columns: 300px 1fr; min-height: 660px; overflow: hidden; border: 1px solid var(--line); border-radius: 32px; background: var(--card); box-shadow: 0 24px 70px rgba(50, 56, 50, .09); }
.feature-tabs { display: flex; flex-direction: column; padding: 22px; border-right: 1px solid var(--line); background: #f0ebdf; }
.feature-tab { flex: 1; display: flex; align-items: center; gap: 18px; padding: 14px 16px; border: 0; border-bottom: 1px solid var(--line); color: #697169; background: transparent; cursor: pointer; text-align: left; font-weight: 700; transition: .2s ease; }
.feature-tab:last-child { border-bottom: 0; }
.feature-tab span { color: #9a9f98; font-size: 11px; }
.feature-tab.active { color: var(--green-deep); padding-left: 24px; background: rgba(255,255,255,.72); border-radius: 16px; }
.feature-panel { display: grid; grid-template-columns: 1fr 340px; align-items: center; gap: 40px; padding: 54px 62px; overflow: hidden; }
.feature-copy h3 { margin: 20px 0; font: 700 42px/1.25 "STKaiti", "KaiTi", serif; }
.feature-copy p { color: var(--muted); line-height: 1.9; }
.feature-kicker { color: var(--orange); font-size: 12px; font-weight: 800; letter-spacing: .14em; }
.feature-meta { display: flex; gap: 10px; margin-top: 28px; }
.feature-meta span { padding: 8px 12px; border-radius: 999px; color: var(--green-deep); background: var(--green-soft); font-size: 12px; font-weight: 700; }
.phone-feature { width: 260px; height: 566px; justify-self: center; transform: rotate(2deg); transition: transform .3s ease; }
.phone-feature.switching { transform: rotate(2deg) scale(.96); }
.mini-features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 22px; }
.mini-card { padding: 32px; border: 1px solid var(--line); border-radius: 22px; background: rgba(255,253,248,.7); }
.mini-icon { display: grid; place-items: center; width: 42px; height: 42px; border-radius: 12px; color: #fff; background: var(--orange); font-size: 20px; }
.mini-card h3 { margin: 26px 0 10px; }.mini-card p { margin: 0; color: var(--muted); line-height: 1.75; }

.privacy-section { color: #eff5ef; background: #284739; }
.privacy-grid { display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: 100px; }
.privacy-visual { min-height: 560px; position: relative; display: grid; place-items: center; }
.privacy-ring { position: absolute; border: 1px solid rgba(255,255,255,.16); border-radius: 50%; }.ring-one { width: 460px; height: 460px; }.ring-two { width: 330px; height: 330px; }
.privacy-device { z-index: 2; width: 220px; height: 280px; display: flex; flex-direction: column; align-items: center; justify-content: center; border: 1px solid rgba(255,255,255,.3); border-radius: 38px; background: rgba(255,255,255,.08); box-shadow: inset 0 0 50px rgba(255,255,255,.03); backdrop-filter: blur(8px); }
.privacy-device .lock { display: grid; place-items: center; width: 72px; height: 72px; margin-bottom: 26px; border-radius: 50%; color: #274737; background: #edc988; font-size: 38px; }.privacy-device strong { font: 700 24px "STKaiti", "KaiTi", serif; }.privacy-device small { margin-top: 6px; color: #b8c9be; letter-spacing: .14em; text-transform: uppercase; }
.privacy-chip { position: absolute; z-index: 3; padding: 10px 18px; border: 1px solid rgba(255,255,255,.18); border-radius: 999px; color: #d8e5dc; background: rgba(255,255,255,.08); }.chip-a { left: 5%; top: 25%; }.chip-b { right: 4%; top: 20%; }.chip-c { left: 9%; bottom: 20%; }.chip-d { right: 7%; bottom: 24%; }
.eyebrow-light { color: #edc98d; }
.privacy-copy > p { color: #bed0c4; }
.privacy-list { margin: 40px 0 0; padding: 0; list-style: none; }
.privacy-list li { display: grid; grid-template-columns: 42px 1fr; gap: 18px; padding: 22px 0; border-top: 1px solid rgba(255,255,255,.14); }
.privacy-list li > span { color: #edc98d; font-size: 12px; font-weight: 800; }.privacy-list strong, .privacy-list small { display: block; }.privacy-list small { margin-top: 5px; color: #afc2b6; font-size: 14px; }

.steps-section .section-heading { max-width: 780px; }
.steps-grid { display: grid; grid-template-columns: repeat(4, 1fr); margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.steps-grid li { min-height: 260px; padding: 30px 28px; border-right: 1px solid var(--line); }
.steps-grid li:last-child { border-right: 0; }
.steps-grid li > span { color: var(--orange); font-size: 12px; font-weight: 800; }.steps-grid h3 { margin: 54px 0 16px; font: 700 28px "STKaiti", "KaiTi", serif; }.steps-grid p { color: var(--muted); line-height: 1.75; }

.platform-section { background: #efe8dc; }
.platform-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.platform-card { min-height: 390px; display: flex; flex-direction: column; padding: 34px; border: 1px solid var(--line); border-radius: 26px; background: rgba(255,253,248,.72); }
.platform-card.available { color: #f7f4ec; background: var(--green-deep); box-shadow: 0 22px 54px rgba(47,81,65,.18); }
.platform-card-top { display: flex; align-items: center; justify-content: space-between; gap: 18px; }
.platform-icon { width: 48px; height: 48px; display: grid; place-items: center; border-radius: 15px; color: #fff; background: var(--orange); font: 800 20px/1 system-ui, sans-serif; }
.platform-icon.apple { color: var(--ink); background: #ddd9d1; }.platform-icon.wechat { background: #6d9b79; }
.platform-status { padding: 7px 11px; border-radius: 999px; color: var(--muted); background: rgba(31,42,35,.07); font-size: 11px; font-weight: 800; letter-spacing: .08em; }
.status-ready { color: #244536; background: #edc98d; }
.platform-card h3 { margin: 44px 0 16px; font: 700 32px/1.25 "STKaiti", "KaiTi", serif; }
.platform-card p { margin: 0; color: var(--muted); line-height: 1.8; }.platform-card.available p { color: #c8d8ce; }
.platform-download { width: 100%; margin-top: auto; color: var(--green-deep); background: #fffaf0; box-shadow: none; }
.platform-note { margin-top: auto; color: #9a9f98; font-size: 11px; font-weight: 800; letter-spacing: .16em; text-transform: uppercase; }

.faq-section { background: #e8dfd0; }
.faq-grid { display: grid; grid-template-columns: .85fr 1.15fr; gap: 90px; }
.faq-list details { border-top: 1px solid var(--line); }
.faq-list details:last-child { border-bottom: 1px solid var(--line); }
.faq-list summary { display: flex; justify-content: space-between; align-items: center; gap: 20px; padding: 26px 4px; cursor: pointer; list-style: none; font-weight: 800; }
.faq-list summary::-webkit-details-marker { display: none; }.faq-list summary span { transition: .2s; font-size: 24px; font-weight: 400; }.faq-list details[open] summary span { transform: rotate(45deg); }.faq-list p { margin: 0; padding: 0 48px 28px 4px; color: var(--muted); line-height: 1.8; }

.cta-section { min-height: 330px; margin-top: 120px; margin-bottom: 120px; display: flex; align-items: center; justify-content: space-between; gap: 40px; padding: 68px; border-radius: 34px; color: #f8f4eb; background: var(--orange); box-shadow: 0 25px 60px rgba(188, 86, 48, .2); }
.cta-kicker { font-size: 12px; font-weight: 800; letter-spacing: .14em; }.cta-section h2 { margin: 18px 0 10px; font-size: clamp(42px, 5vw, 66px); }.cta-section p { margin: 0; color: #ffe8de; }
.site-footer { padding: 62px 0; color: #c8d2cb; background: #1d2d25; }
.footer-grid { display: flex; align-items: flex-end; justify-content: space-between; gap: 40px; }.footer-grid p { color: #8fa096; }.footer-meta { display: flex; flex-direction: column; align-items: flex-end; gap: 9px; font-size: 13px; }.footer-meta a { color: #edc98d; }.footer-meta small { color: #778a7f; }
.toast { position: fixed; z-index: 100; left: 50%; bottom: 28px; max-width: calc(100% - 32px); padding: 14px 20px; border-radius: 999px; color: #fff; background: #1f2a23; box-shadow: 0 12px 40px rgba(0,0,0,.25); opacity: 0; transform: translate(-50%, 20px); pointer-events: none; transition: .25s ease; }.toast.show { opacity: 1; transform: translate(-50%, 0); }
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s ease, transform .7s ease; }.reveal.visible { opacity: 1; transform: none; }

@media (max-width: 980px) {
  .site-nav { gap: 18px; }.site-nav a { display: none; }
  .hero { grid-template-columns: 1fr; gap: 30px; padding-top: 54px; }.hero-copy { text-align: center; }.hero-copy .eyebrow, .hero-actions, .trust-list { justify-content: center; }.hero-lead { margin-inline: auto; }.hero-visual { min-height: 590px; }
  .feature-showcase { grid-template-columns: 1fr; }.feature-tabs { flex-direction: row; overflow-x: auto; border-right: 0; border-bottom: 1px solid var(--line); }.feature-tab { flex: 0 0 160px; border-right: 1px solid var(--line); border-bottom: 0; }.feature-tab.active { padding-left: 16px; }.feature-panel { grid-template-columns: 1fr 300px; padding: 44px; }
  .privacy-grid { gap: 40px; }.steps-grid { grid-template-columns: repeat(2, 1fr); }.steps-grid li:nth-child(2) { border-right: 0; }.steps-grid li:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
}

@media (max-width: 720px) {
  .section-shell { width: min(100% - 28px, 1180px); }.section { padding: 82px 0; }
  .site-header { padding: 8px 0; }.nav-shell { width: calc(100% - 16px); }.nav-toggle { display: block; }.site-nav { position: absolute; left: 8px; right: 8px; top: 76px; display: none; align-items: stretch; flex-direction: column; gap: 0; padding: 14px; border: 1px solid var(--line); border-radius: 18px; background: #fffdf8; box-shadow: var(--shadow); }.site-nav.open { display: flex; }.site-nav a { display: block; padding: 14px; }.site-nav .button { margin-top: 8px; }.nav-toggle[aria-expanded="true"] span:first-child { transform: translateY(4px) rotate(45deg); }.nav-toggle[aria-expanded="true"] span:last-child { transform: translateY(-4px) rotate(-45deg); }
  .hero { min-height: auto; padding: 58px 0 80px; }.hero h1 { font-size: clamp(42px, 13vw, 60px); }.hero-lead { font-size: 16px; }.hero-actions .button { width: 100%; }.trust-list { gap: 12px 18px; }.hero-visual { min-height: 560px; }.phone-hero { height: 520px; width: 240px; }.note-card-top { left: -6px; top: 70px; }.note-card-bottom { right: -4px; bottom: 44px; }.orb-one { width: 330px; height: 330px; }
  .proof-track { animation-duration: 18s; }
  .section-heading h2, .privacy-copy h2 { font-size: 44px; }.section-heading { margin-bottom: 40px; }
  .compare-grid, .privacy-grid, .faq-grid { grid-template-columns: 1fr; }.compare-card { min-height: 390px; padding: 30px; }.compare-card h3 { margin-top: 38px; font-size: 31px; }.flow-line span { width: 58px; }.flow-line b { font-size: 13px; }
  .feature-panel { grid-template-columns: 1fr; padding: 38px 24px; }.feature-copy h3 { font-size: 34px; }.phone-feature { width: 240px; height: 522px; }.mini-features { grid-template-columns: 1fr; }
  .privacy-grid { gap: 18px; }.privacy-visual { min-height: 440px; }.ring-one { width: 350px; height: 350px; }.ring-two { width: 260px; height: 260px; }.privacy-device { width: 180px; height: 230px; }.privacy-chip { font-size: 12px; }
  .steps-grid, .platform-grid { grid-template-columns: 1fr; }.steps-grid li { min-height: auto; border-right: 0; border-bottom: 1px solid var(--line); }.steps-grid h3 { margin-top: 34px; }.faq-grid { gap: 30px; }.platform-card { min-height: 340px; }
  .cta-section { margin-top: 72px; margin-bottom: 72px; flex-direction: column; align-items: flex-start; padding: 42px 28px; }.cta-section .button { width: 100%; }.footer-grid { align-items: flex-start; flex-direction: column; }.footer-meta { align-items: flex-start; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; } *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }.reveal { opacity: 1; transform: none; }
}