:root {
  --paper: #fdfcfb;
  --paper-deep: #f1efe9;
  --ink: #2d2d2d;
  --muted: #66645f;
  --line: #e6e4dd;
  --signal: #e65c5c;
  --night: #171819;
  font-family: "Noto Sans TC", "Microsoft JhengHei UI", system-ui, sans-serif;
  color: var(--ink);
  background: var(--paper);
  scroll-behavior: smooth;
}

* { box-sizing: border-box; }
body { margin: 0; background: var(--paper); color: var(--ink); -webkit-font-smoothing: antialiased; }
a { color: inherit; }
.site-header { position: sticky; top: 0; z-index: 20; display: flex; align-items: center; justify-content: space-between; min-height: 68px; padding: 0 5vw; background: color-mix(in srgb, var(--paper) 88%, transparent); border-bottom: 1px solid color-mix(in srgb, var(--line) 80%, transparent); backdrop-filter: blur(18px); }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font-size: 15px; letter-spacing: -.02em; }
.brand-mark { display: grid; place-items: center; width: 26px; height: 26px; border-radius: 9px; background: var(--ink); }
.brand-mark span { width: 7px; height: 7px; border-radius: 50%; background: var(--signal); box-shadow: 0 0 0 4px rgba(230,92,92,.14); }
.site-header nav, footer nav { display: flex; gap: 26px; }
.site-header nav a, footer nav a { color: var(--muted); text-decoration: none; font-size: 13px; font-weight: 600; }
.site-header nav a:hover, footer nav a:hover { color: var(--signal); }

.hero { min-height: calc(100vh - 68px); display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 96px 24px 86px; text-align: center; overflow: hidden; }
.eyebrow, .section-heading > p, .privacy-intro > p:first-child { color: var(--muted); font-size: 12px; font-weight: 700; letter-spacing: .16em; text-transform: uppercase; }
.eyebrow { display: flex; align-items: center; gap: 9px; }
.eyebrow span { width: 7px; height: 7px; border-radius: 50%; background: var(--signal); }
h1 { max-width: 940px; margin: 30px 0 22px; font-size: clamp(54px, 8vw, 116px); line-height: .98; letter-spacing: -.065em; }
h1 em { color: var(--signal); font-style: normal; }
.hero-copy { max-width: 690px; margin: 0; color: var(--muted); font-size: clamp(17px, 2vw, 21px); line-height: 1.75; }
.listening-demo { display: grid; grid-template-columns: 10px 1fr auto; align-items: center; gap: 12px; width: min(340px, 90vw); height: 54px; margin: 42px 0 30px; padding: 0 16px; color: #f7f8fa; background: #171a20; border: 1px solid #292e38; border-radius: 28px; box-shadow: 0 20px 45px rgba(30,30,30,.15); text-align: left; }
.listening-demo strong { font-size: 15px; }
.listening-demo > span:last-child { color: #9096a3; font-size: 12px; }
.live-dot { width: 8px; height: 8px; border-radius: 50%; background: #ff5c6c; box-shadow: 0 0 0 5px rgba(255,92,108,.1); animation: pulse 1.8s ease-in-out infinite; }
@keyframes pulse { 50% { opacity: .55; transform: scale(.86); } }
.hero-actions { display: flex; align-items: center; justify-content: center; gap: 24px; }
.primary-link { display: inline-flex; align-items: center; justify-content: center; gap: 10px; min-height: 54px; padding: 0 24px; color: #fff; background: var(--ink); border-radius: 14px; text-decoration: none; font-size: 15px; font-weight: 700; box-shadow: 0 10px 24px rgba(45,45,45,.13); transition: transform .18s ease, background .18s ease; }
.primary-link:hover { background: #151515; transform: translateY(-2px); }
.primary-link svg { width: 20px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.text-link { color: var(--ink); font-size: 14px; font-weight: 700; text-underline-offset: 5px; }
.platform-note { display: flex; gap: 12px; margin: 24px 0 0; color: var(--muted); font-size: 12px; }
.platform-note span { padding: 7px 11px; border: 1px solid var(--line); border-radius: 99px; }
.platform-note .coming-soon { color: #8b3034; background: #fff1f0; border-color: #f2d1cf; }
.status-badge { display: inline-flex; align-items: center; justify-content: center; min-height: 50px; padding: 0 20px; color: #8b3034; background: #fff1f0; border: 1px solid #f2d1cf; border-radius: 14px; font-size: 14px; font-weight: 800; }
.invite-eyebrow { color: #8b3034; }
.invite-access { max-width: 1220px; margin: 0 auto 20px; padding: clamp(36px, 6vw, 72px); display: grid; grid-template-columns: .9fr 1.1fr; gap: clamp(42px, 7vw, 92px); color: #fff; background: var(--ink); border-radius: 28px; box-shadow: 0 24px 70px rgba(45,45,45,.13); }
.invite-access-copy > p:first-child { margin: 0 0 18px; color: #ff9d9a; font-size: 12px; font-weight: 800; letter-spacing: .16em; }
.invite-access h2 { margin: 0; font-size: clamp(38px, 5vw, 66px); line-height: 1.04; letter-spacing: -.045em; }
.invite-access-copy > p:last-child { max-width: 500px; margin: 24px 0 0; color: #c9c9c9; font-size: 15px; line-height: 1.8; }
.invite-access-flow { list-style: none; margin: 0; padding: 0; }
.invite-access-flow li { display: grid; grid-template-columns: 48px 1fr; gap: 18px; padding: 20px 0; border-bottom: 1px solid rgba(255,255,255,.14); }
.invite-access-flow li > span { color: #ff9d9a; font-size: 12px; font-weight: 800; letter-spacing: .08em; }
.invite-access-flow strong { display: block; font-size: 17px; }
.invite-access-flow p { margin: 7px 0 0; color: #aaa; font-size: 14px; line-height: 1.65; }
.invite-access-note { grid-column: 1 / -1; display: flex; justify-content: space-between; gap: 24px; margin: 0; padding-top: 28px; border-top: 1px solid rgba(255,255,255,.14); font-size: 14px; }
.invite-access-note span { color: #aaa; text-align: right; }
.invite-note { max-width: 620px; margin: 0; padding: 22px 24px; color: var(--muted); background: #fff; border: 1px solid var(--line); border-radius: 16px; line-height: 1.7; }
.invite-note strong { color: var(--ink); }
.fine-print { color: var(--muted); font-size: 13px; line-height: 1.7; }
.invite-shell { min-height: 100vh; display: grid; place-items: center; padding: 32px; }
.invite-card { width: min(720px, 100%); padding: clamp(32px, 6vw, 64px); background: #fff; border: 1px solid var(--line); border-radius: 24px; box-shadow: 0 24px 70px rgba(45,45,45,.08); }
.invite-card h1 { margin: 18px 0; font-size: clamp(40px, 7vw, 72px); }
.invite-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 30px 0; }
.invite-steps { padding-left: 24px; color: var(--muted); line-height: 2; }

.section { max-width: 1220px; margin: 0 auto; padding: 120px 36px; }
.section-heading { max-width: 680px; margin-bottom: 54px; }
.section-heading h2, .privacy h2 { margin: 12px 0 0; font-size: clamp(36px, 5vw, 64px); line-height: 1.08; letter-spacing: -.045em; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.feature-grid article { min-height: 245px; display: flex; flex-direction: column; padding: 28px; background: #fff; border: 1px solid var(--line); border-radius: 18px; }
.feature-grid article:nth-child(2n) { background: var(--paper-deep); }
.feature-grid article > span { color: var(--signal); font-size: 12px; font-weight: 800; letter-spacing: .14em; }
.feature-grid h3 { margin: auto 0 10px; font-size: 22px; letter-spacing: -.03em; }
.feature-grid p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.75; }

.workflow { padding: 115px max(36px, calc((100vw - 1148px) / 2)); color: #f7f5f0; background: var(--night); }
.section-heading.light > p { color: #aaa8a2; }
.section-heading.light h2 { color: #fff; }
.workflow ol { list-style: none; display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; padding: 0; margin: 60px 0 0; background: #3a3b3c; border: 1px solid #3a3b3c; border-radius: 18px; overflow: hidden; }
.workflow li { min-height: 260px; padding: 32px; background: var(--night); }
.workflow li > span { display: grid; place-items: center; width: 42px; height: 42px; color: var(--signal); border: 1px solid #4a4b4c; border-radius: 50%; font-weight: 800; }
.workflow li div { margin-top: 64px; }
.workflow h3 { margin: 0 0 10px; font-size: 20px; }
.workflow p { margin: 0; color: #aaa8a2; font-size: 14px; line-height: 1.7; }

.privacy { display: grid; grid-template-columns: .9fr 1.1fr; gap: 80px; align-items: start; }
.privacy-intro > p:last-child { color: var(--muted); font-size: 16px; line-height: 1.8; }
.security-list { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.security-list li { display: grid; grid-template-columns: 170px 1fr; gap: 24px; padding: 24px 0; border-bottom: 1px solid var(--line); }
.security-list span { color: var(--muted); font-size: 14px; line-height: 1.65; }

.install { border-top: 1px solid var(--line); }
.install-grid { display: grid; grid-template-columns: 1.2fr .8fr; gap: 60px; }
.install-steps ol { list-style: none; margin: 0 0 36px; padding: 0; }
.install-steps li { display: grid; grid-template-columns: 40px 1fr; gap: 18px; padding: 22px 0; border-bottom: 1px solid var(--line); }
.install-steps li > span { color: var(--signal); font-size: 12px; font-weight: 800; }
.install-steps strong { font-size: 17px; }
.install-steps p { margin: 6px 0 0; color: var(--muted); font-size: 14px; line-height: 1.65; }
.primary-link.dark { min-width: 220px; }
.requirements { padding: 30px; background: #fff; border: 1px solid var(--line); border-radius: 18px; }
.requirements h3 { margin: 0 0 18px; font-size: 16px; }
.requirements h3:not(:first-child) { margin-top: 32px; }
.requirements dl { margin: 0; }
.requirements dl > div { display: flex; justify-content: space-between; gap: 20px; padding: 12px 0; border-bottom: 1px solid var(--line); font-size: 13px; }
.requirements dt { color: var(--muted); }
.requirements dd { margin: 0; font-weight: 700; text-align: right; }
.requirements code { display: block; padding: 14px; color: #5b3637; background: #fff6f5; border: 1px solid #f2d1cf; border-radius: 10px; font-size: 11px; line-height: 1.6; word-break: break-all; user-select: all; }

footer { display: flex; align-items: center; justify-content: space-between; gap: 30px; padding: 42px 5vw; background: var(--paper-deep); border-top: 1px solid var(--line); }
footer > div { display: flex; flex-direction: column; gap: 5px; }
footer strong { font-size: 14px; }
footer span { color: var(--muted); font-size: 12px; }

@media (max-width: 850px) {
  .site-header nav { display: none; }
  .hero { min-height: auto; padding-top: 92px; }
  .hero-actions, .platform-note { flex-direction: column; }
  .feature-grid, .workflow ol, .privacy, .install-grid, .invite-access { grid-template-columns: 1fr; }
  .invite-access { margin: 0 18px 20px; padding: 36px 26px; border-radius: 22px; }
  .invite-access-note { grid-column: auto; flex-direction: column; gap: 8px; }
  .invite-access-note span { text-align: left; }
  .privacy { gap: 36px; }
  .workflow li { min-height: 210px; }
  .workflow li div { margin-top: 40px; }
  .security-list li { grid-template-columns: 1fr; gap: 7px; }
  footer { flex-direction: column; align-items: flex-start; }
  footer nav { flex-wrap: wrap; gap: 16px; }
}

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