@import url('https://fonts.googleapis.com/css2?family=DM+Mono:wght@400;500&family=Manrope:wght@400;500;600;700;800&family=Noto+Sans+SC:wght@400;500;600;700;900&display=swap');

:root {
  --ink: #101b28;
  --ink-soft: #41505f;
  --muted: #7b8792;
  --mist: #f2f7f6;
  --paper: #fbfcfa;
  --line: rgba(16, 27, 40, 0.12);
  --teal: #56d6cf;
  --teal-deep: #177e7e;
  --coral: #ff927c;
  --gold: #e5bd73;
  --white: #ffffff;
  --display: 'Manrope', 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --body: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --mono: 'DM Mono', 'SFMono-Regular', Consolas, monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--body);
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
button { font: inherit; }

/* 客户端入口只在微信内置浏览器开放，避免普通浏览器展示不可用的跳转操作。 */
html.is-non-wechat [data-wechat-only],
html.is-non-wechat .hero-actions,
html.is-non-wechat .card-actions,
html.is-non-wechat .qr-status { display: none !important; }

.site-noise {
  position: fixed;
  z-index: -1;
  inset: 0;
  pointer-events: none;
  opacity: 0.17;
  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='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.12'/%3E%3C/svg%3E");
}

.shell, .section-shell { width: min(1180px, calc(100% - 64px)); margin: 0 auto; }
.site-header { position: sticky; top: 0; z-index: 20; border-bottom: 1px solid rgba(16, 27, 40, 0.08); background: rgba(251, 252, 250, 0.9); backdrop-filter: blur(18px); }
.header-inner { display: flex; align-items: center; justify-content: space-between; min-height: 82px; }
.brand { display: inline-flex; align-items: center; gap: 12px; }
.brand-mark { display: inline-flex; align-items: end; gap: 3px; width: 28px; height: 30px; padding: 4px; border-radius: 9px; background: var(--ink); transform: rotate(-8deg); }
.brand-mark i { display: block; width: 4px; border-radius: 4px; background: var(--teal); }
.brand-mark i:nth-child(1) { height: 10px; opacity: 0.65; }
.brand-mark i:nth-child(2) { height: 17px; }
.brand-mark i:nth-child(3) { height: 22px; background: var(--coral); }
.brand-copy { display: grid; gap: 1px; }
.brand-copy strong { font: 800 17px/1 var(--display); letter-spacing: -0.04em; }
.brand-copy small { color: var(--muted); font-size: 10px; letter-spacing: 0.12em; }
.main-nav { display: flex; align-items: center; gap: 32px; color: var(--ink-soft); font-size: 13px; }
.main-nav > a:not(.nav-button) { position: relative; padding: 10px 0; }
.main-nav > a:not(.nav-button)::after { position: absolute; right: 0; bottom: 4px; left: 0; height: 1px; content: ''; background: var(--teal-deep); transform: scaleX(0); transform-origin: right; transition: transform 220ms ease; }
.main-nav > a:not(.nav-button):hover::after { transform: scaleX(1); transform-origin: left; }
.nav-button { padding: 11px 18px; border: 1px solid var(--ink); border-radius: 999px; color: var(--white); background: var(--ink); transition: transform 180ms ease, background 180ms ease; }
.nav-button:hover { background: var(--teal-deep); transform: translateY(-2px); }
.mobile-menu-button { display: none; border: 0; background: none; cursor: pointer; }

.hero-section { overflow: hidden; padding: 92px 0 28px; background: linear-gradient(116deg, #edf7f5 0%, var(--paper) 44%, #fff4ef 100%); }
.hero-grid { display: grid; grid-template-columns: minmax(0, 0.92fr) minmax(420px, 1.08fr); align-items: center; gap: 60px; }
.kicker, .section-label, .card-eyebrow { margin: 0; font: 500 11px/1.2 var(--mono); letter-spacing: 0.13em; text-transform: uppercase; }
.kicker { display: inline-flex; align-items: center; gap: 9px; color: var(--teal-deep); }
.kicker-line { width: 32px; height: 1px; background: currentColor; }
.hero-copy h1 { max-width: 560px; margin: 23px 0 20px; font: 800 clamp(44px, 6vw, 76px)/1.08 var(--display); letter-spacing: -0.075em; }
.hero-copy h1 em, .story-intro h2 em { color: var(--teal-deep); font-style: normal; }
.hero-intro { max-width: 480px; margin: 0; color: var(--ink-soft); font-size: 16px; line-height: 1.9; }
.hero-actions { display: flex; align-items: center; gap: 12px; margin-top: 34px; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 10px; min-height: 48px; padding: 0 22px; border: 1px solid transparent; border-radius: 999px; font-weight: 600; font-size: 13px; transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease; }
.button:hover { transform: translateY(-3px); }
.button-primary { color: var(--white); background: var(--ink); box-shadow: 0 10px 24px rgba(16, 27, 40, 0.14); }
.button-primary:hover { background: var(--teal-deep); box-shadow: 0 12px 28px rgba(23, 126, 126, 0.22); }
.button-quiet { border-color: var(--line); color: var(--ink-soft); background: rgba(255, 255, 255, 0.5); }
.button-quiet:hover { border-color: var(--teal); background: var(--white); }
.hero-notes { display: flex; flex-wrap: wrap; gap: 18px; margin-top: 44px; color: var(--muted); font-size: 11px; }
.hero-notes span { display: inline-flex; align-items: center; gap: 7px; }
.hero-notes b { color: var(--teal-deep); font: 500 10px var(--mono); }

.hero-visual { position: relative; min-height: 500px; isolation: isolate; }
.visual-grid { position: absolute; inset: 40px -40px 40px 30px; z-index: -2; opacity: 0.48; background-image: linear-gradient(rgba(23, 126, 126, 0.1) 1px, transparent 1px), linear-gradient(90deg, rgba(23, 126, 126, 0.1) 1px, transparent 1px); background-size: 36px 36px; mask-image: linear-gradient(90deg, transparent, #000 22%, #000 80%, transparent); }
.visual-orbit { position: absolute; border: 1px solid rgba(23, 126, 126, 0.18); border-radius: 50%; transform: rotate(-17deg); }
.visual-orbit-one { top: 55px; right: 40px; width: 430px; height: 340px; }
.visual-orbit-two { top: 90px; right: 95px; width: 340px; height: 270px; border-color: rgba(255, 146, 124, 0.28); transform: rotate(29deg); }
.signal-core { position: absolute; top: 184px; right: 212px; display: grid; place-items: center; width: 130px; height: 130px; border: 1px solid rgba(23, 126, 126, 0.32); border-radius: 50%; background: rgba(255, 255, 255, 0.64); box-shadow: 0 26px 56px rgba(23, 126, 126, 0.12); }
.core-ring { position: absolute; inset: 13px; border: 1px dashed rgba(23, 126, 126, 0.45); border-radius: 50%; animation: spin 18s linear infinite; }
.core-mark { z-index: 1; font: 800 23px var(--display); letter-spacing: -0.12em; }
.signal-core small { position: absolute; bottom: -30px; color: var(--teal-deep); font: 500 10px var(--mono); white-space: nowrap; }
.signal-card { position: absolute; display: grid; gap: 7px; width: 240px; padding: 18px 19px; border: 1px solid rgba(16, 27, 40, 0.1); border-radius: 18px; background: rgba(255, 255, 255, 0.78); box-shadow: 0 18px 36px rgba(16, 27, 40, 0.08); backdrop-filter: blur(14px); }
.signal-card-user { top: 72px; left: 7px; transform: rotate(-5deg); }
.signal-card-tech { right: 2px; bottom: 70px; border-color: rgba(255, 146, 124, 0.3); transform: rotate(5deg); }
.signal-card-top { display: flex; align-items: center; gap: 7px; color: var(--muted); }
.signal-card-top small { font: 500 10px var(--mono); letter-spacing: 0.08em; }
.signal-arrow { margin-left: auto; color: var(--teal-deep); font-size: 15px; }
.signal-card-tech .signal-arrow { color: var(--coral); }
.signal-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--teal); box-shadow: 0 0 0 4px rgba(86, 214, 207, 0.17); }
.signal-dot-coral { background: var(--coral); box-shadow: 0 0 0 4px rgba(255, 146, 124, 0.17); }
.signal-card strong { font: 700 20px var(--display); letter-spacing: -0.06em; }
.signal-card > span:last-child { color: var(--muted); font-size: 11px; }
.visual-caption { position: absolute; bottom: 3px; left: 56px; color: rgba(16, 27, 40, 0.35); font: 500 10px/1.5 var(--mono); letter-spacing: 0.16em; }
.visual-caption b { color: var(--teal-deep); font-weight: 500; }
.hero-bottom-line { display: flex; justify-content: space-between; align-items: center; margin-top: 70px; padding-top: 18px; border-top: 1px solid var(--line); color: var(--muted); font-size: 11px; }
.hero-bottom-line a { color: var(--teal-deep); font-weight: 600; }
.hero-bottom-line a span { margin-left: 5px; }

.section-shell { padding-top: 130px; padding-bottom: 130px; }
.section-heading { max-width: 580px; }
.section-label { color: var(--teal-deep); }
.section-heading h2, .story-intro h2, .promise-panel h2 { margin: 15px 0 15px; font: 800 clamp(34px, 4.6vw, 58px)/1.13 var(--display); letter-spacing: -0.07em; }
.section-heading > p:last-child { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.8; }
.download-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; margin-top: 50px; }
.download-card { position: relative; min-height: 420px; padding: 30px; overflow: hidden; border: 1px solid var(--line); border-radius: 21px; background: var(--white); }
.download-card::before { position: absolute; top: -80px; right: -50px; width: 230px; height: 230px; border-radius: 50%; content: ''; background: rgba(86, 214, 207, 0.11); }
.download-card-tech::before { background: rgba(255, 146, 124, 0.12); }
.download-card-heading { position: relative; z-index: 1; display: flex; justify-content: space-between; gap: 14px; }
.card-eyebrow { color: var(--teal-deep); }
.download-card-tech .card-eyebrow { color: #c46858; }
.download-card h3 { margin: 12px 0 0; font: 700 24px/1.2 var(--display); letter-spacing: -0.06em; }
.card-index { color: rgba(16, 27, 40, 0.16); font: 500 27px var(--mono); }
.card-description { position: relative; z-index: 1; max-width: 420px; margin: 12px 0 25px; color: var(--muted); font-size: 13px; line-height: 1.75; }
.qr-layout { position: relative; z-index: 1; display: grid; grid-template-columns: 190px minmax(0, 1fr); align-items: center; gap: 29px; margin-top: 28px; }
.qr-frame { position: relative; display: grid; place-items: center; width: 190px; height: 190px; padding: 13px; border: 1px solid rgba(23, 126, 126, 0.2); border-radius: 24px; background: linear-gradient(145deg, #ffffff 0%, #f5fbfa 100%); box-shadow: 0 0 0 6px rgba(86, 214, 207, 0.08), 0 18px 34px rgba(16, 27, 40, 0.1); isolation: isolate; }
.qr-frame::before { position: absolute; z-index: 2; inset: 7px; border: 1px solid rgba(23, 126, 126, 0.14); border-radius: 18px; content: ''; pointer-events: none; }
.download-card-tech .qr-frame { border-color: rgba(255, 146, 124, 0.3); background: linear-gradient(145deg, #ffffff 0%, #fff8f5 100%); box-shadow: 0 0 0 6px rgba(255, 146, 124, 0.08), 0 18px 34px rgba(16, 27, 40, 0.1); }
.download-card-tech .qr-frame::before { border-color: rgba(255, 146, 124, 0.18); }
.qr-frame canvas, .qr-frame img { position: relative; z-index: 1; display: none; width: 164px !important; height: 164px !important; background: var(--white); image-rendering: pixelated; }
.qr-frame.is-ready canvas { display: block; }
.qr-frame.is-ready img { display: block; }
.qr-frame.is-ready .qr-placeholder { display: none; }
.qr-placeholder { color: var(--muted); font-size: 11px; text-align: center; line-height: 1.6; }
.qr-meta { min-width: 0; min-height: 122px; display: grid; align-content: center; gap: 14px; }
.qr-status { width: fit-content; padding: 6px 10px; border-radius: 999px; color: var(--teal-deep); background: rgba(86, 214, 207, 0.14); font: 500 10px var(--mono); letter-spacing: 0.04em; }
.qr-status-coral { color: #b15b4e; background: rgba(255, 146, 124, 0.15); }
.card-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 12px; padding-top: 13px; border-top: 1px solid var(--line); }
.text-link { color: var(--teal-deep); font-size: 12px; font-weight: 700; }
.text-link-coral { color: #b15b4e; }
.api-note { min-height: 20px; margin: 18px 0 0; color: var(--muted); font: 10px var(--mono); }
.api-note.is-error { color: #b15b4e; }

.story-section { display: grid; grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr); gap: 80px; border-top: 1px solid var(--line); }
.story-intro h2 { margin-bottom: 0; }
.story-steps { display: grid; gap: 0; align-content: center; }
.story-step { display: grid; grid-template-columns: 64px 1fr; gap: 23px; padding: 24px 0; border-bottom: 1px solid var(--line); }
.story-step:first-child { padding-top: 0; }
.story-step:last-child { border-bottom: 0; }
.step-number { color: var(--teal-deep); font: 500 12px var(--mono); }
.story-step h3 { margin: 0 0 7px; font: 700 18px var(--display); letter-spacing: -0.04em; }
.story-step p { max-width: 410px; margin: 0; color: var(--muted); font-size: 13px; line-height: 1.8; }

.promise-section { padding-top: 0; }
.promise-panel { display: grid; grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr); gap: 70px; padding: 63px 70px; border-radius: 24px; color: var(--white); background: var(--ink); }
.section-label-light { color: var(--teal); }
.promise-panel h2 { margin-bottom: 0; }
.promise-list { display: grid; align-content: center; gap: 20px; }
.promise-list > div { display: grid; grid-template-columns: 40px 1fr; gap: 14px; align-items: start; padding-top: 18px; border-top: 1px solid rgba(255, 255, 255, 0.18); }
.promise-list > div:first-child { padding-top: 0; border-top: 0; }
.promise-list span { color: var(--teal); font: 500 11px var(--mono); }
.promise-list p { margin: 0; font-size: 15px; line-height: 1.6; }
.promise-list small { color: rgba(255, 255, 255, 0.52); font-size: 11px; }
.site-footer { padding: 25px 0; border-top: 1px solid var(--line); }
.footer-inner { display: flex; align-items: center; gap: 20px; color: var(--muted); font-size: 11px; }
.footer-brand { display: inline-flex; align-items: center; gap: 8px; color: var(--ink); }
.footer-brand .brand-mark { width: 22px; height: 23px; padding: 3px; border-radius: 7px; }
.footer-brand .brand-mark i { width: 3px; }
.footer-brand .brand-mark i:nth-child(1) { height: 8px; }
.footer-brand .brand-mark i:nth-child(2) { height: 13px; }
.footer-brand .brand-mark i:nth-child(3) { height: 17px; }
.footer-brand strong { font-size: 13px; }
.footer-inner p { margin: 0; }
.footer-copyright { margin-left: auto; font: 10px var(--mono); }
@keyframes spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { scroll-behavior: auto !important; animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; } }
@media (max-width: 900px) {
  .shell, .section-shell { width: min(100% - 40px, 680px); }
  .hero-grid, .story-section, .promise-panel { grid-template-columns: 1fr; gap: 45px; }
  .hero-section { padding-top: 65px; }
  .hero-visual { min-height: 430px; }
  .visual-orbit-one { right: 4%; width: 430px; }
  .visual-orbit-two { right: 13%; }
  .signal-core { right: 37%; }
  .promise-panel { padding: 48px 40px; }
}
@media (max-width: 660px) {
  .shell, .section-shell { width: min(100% - 32px, 500px); }
  .header-inner { min-height: 68px; }
  .mobile-menu-button { display: grid; gap: 5px; padding: 10px 2px; }
  .mobile-menu-button span { display: block; width: 22px; height: 1px; background: var(--ink); transition: transform 180ms ease; }
  .main-nav { position: absolute; top: 68px; right: 16px; left: 16px; display: grid; gap: 0; padding: 10px; border: 1px solid var(--line); border-radius: 16px; background: rgba(251, 252, 250, 0.98); box-shadow: 0 16px 36px rgba(16, 27, 40, 0.12); opacity: 0; pointer-events: none; transform: translateY(-8px); transition: opacity 180ms ease, transform 180ms ease; }
  .main-nav.is-open { opacity: 1; pointer-events: auto; transform: translateY(0); }
  .main-nav > a { padding: 12px; }
  .main-nav > a:not(.nav-button)::after { display: none; }
  .nav-button { text-align: center; }
  .hero-section { padding-top: 55px; }
  .hero-copy h1 { font-size: clamp(42px, 13vw, 60px); }
  .hero-intro { font-size: 14px; }
  .hero-actions { align-items: stretch; flex-direction: column; }
  .button { width: 100%; }
  .hero-notes { gap: 10px 15px; margin-top: 28px; }
  .hero-visual { min-height: 385px; margin-top: 8px; transform: scale(0.92); transform-origin: top center; }
  .visual-grid { inset: 30px -120px 35px -100px; }
  .visual-orbit-one { top: 54px; right: -12%; width: 390px; height: 300px; }
  .visual-orbit-two { top: 80px; right: 0; width: 315px; height: 245px; }
  .signal-card { width: 196px; padding: 15px; }
  .signal-card-user { left: -8px; }
  .signal-card-tech { right: -8px; bottom: 48px; }
  .signal-core { top: 160px; right: calc(50% - 65px); width: 130px; height: 130px; }
  .visual-caption { bottom: -3px; left: 18px; }
  .hero-bottom-line { align-items: flex-start; flex-direction: column; gap: 9px; margin-top: 32px; }
  .section-shell { padding-top: 82px; padding-bottom: 82px; }
  .download-grid { grid-template-columns: 1fr; gap: 14px; margin-top: 32px; }
  .download-card { min-height: 0; padding: 22px; }
  .qr-layout { grid-template-columns: 150px minmax(0, 1fr); align-items: center; gap: 18px; margin-top: 22px; }
  .qr-frame { width: 150px; height: 150px; padding: 10px; border-radius: 20px; }
  .qr-frame::before { inset: 6px; border-radius: 15px; }
  .qr-frame canvas, .qr-frame img { width: 130px !important; height: 130px !important; }
  .qr-meta { min-height: 108px; }
  .story-section { gap: 35px; }
  .promise-panel { gap: 35px; padding: 38px 24px; }
  .footer-inner { align-items: flex-start; flex-wrap: wrap; gap: 10px 16px; }
  .footer-inner p { width: 100%; order: 3; }
  .footer-copyright { margin-left: auto; }
}

@media (max-width: 420px) {
  .qr-layout { grid-template-columns: 1fr; gap: 19px; }
  .qr-frame { width: 180px; height: 180px; padding: 13px; }
  .qr-frame::before { inset: 7px; border-radius: 18px; }
  .qr-frame canvas, .qr-frame img { width: 154px !important; height: 154px !important; }
  .qr-meta { min-height: 0; }
}