:root {
  color-scheme: light;
  --ink: #14211f;
  --muted: #5f6d68;
  --moss: #275f4c;
  --moss-deep: #174536;
  --mint: #cce9d9;
  --mint-soft: #e8f4ed;
  --paper: #f8f3e7;
  --surface: #fffdf8;
  --sand: #f1dfba;
  --clay: #b94c31;
  --clay-soft: #f8d9cf;
  --line: rgba(20, 33, 31, 0.16);
  --shadow: 0 28px 80px rgba(39, 71, 59, 0.14);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang TC", "Noto Sans TC", sans-serif;
  color: var(--ink);
  background: var(--paper);
  font-synthesis: none;
  text-rendering: optimizeLegibility;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  min-width: 320px;
  margin: 0;
  background:
    radial-gradient(circle at 93% 7%, rgba(185, 76, 49, 0.16), transparent 27rem),
    radial-gradient(circle at 7% 40%, rgba(39, 95, 76, 0.11), transparent 32rem),
    var(--paper);
}
a { color: inherit; }
.skip-link {
  position: fixed;
  z-index: 100;
  top: 0.75rem;
  left: 0.75rem;
  padding: 0.7rem 1rem;
  border-radius: 999px;
  color: #fff;
  background: var(--ink);
  transform: translateY(-160%);
}
.skip-link:focus { transform: translateY(0); }
.site-header, main, footer { width: min(1180px, calc(100% - 48px)); margin-inline: auto; }
.site-header {
  display: flex;
  min-height: 88px;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
}
.studio { display: inline-flex; gap: 0.7rem; align-items: center; font-weight: 780; text-decoration: none; }
.studio-mark {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border-radius: 10px 10px 10px 3px;
  color: #fff;
  background: var(--ink);
  font-size: 0.9rem;
  font-weight: 850;
}
nav, .footer-links { display: flex; gap: 1.5rem; align-items: center; }
nav a, .footer-links a { color: var(--muted); font-size: 0.9rem; font-weight: 680; text-decoration: none; }
nav a:hover, .footer-links a:hover { color: var(--ink); }
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(410px, 0.9fr);
  gap: clamp(3rem, 7vw, 7rem);
  min-height: min(790px, calc(100vh - 88px));
  padding: 6rem 0;
  align-items: center;
}
.eyebrow { margin: 0 0 1rem; color: var(--clay); font-size: 0.77rem; font-weight: 850; letter-spacing: 0.14em; text-transform: uppercase; }
h1, h2, h3, p { overflow-wrap: break-word; }
h1 { margin: 0; font-size: clamp(3.25rem, 6.7vw, 6.35rem); font-weight: 850; letter-spacing: -0.068em; line-height: 0.98; }
h2 { margin: 0; font-size: clamp(2.35rem, 5vw, 4.7rem); font-weight: 820; letter-spacing: -0.058em; line-height: 1.02; }
.hero-lead { max-width: 650px; margin: 2rem 0 0; color: var(--muted); font-size: clamp(1.05rem, 1.7vw, 1.22rem); line-height: 1.85; }
.actions { display: flex; gap: 0.8rem; flex-wrap: wrap; margin-top: 2rem; }
.button { display: inline-flex; min-height: 50px; padding: 0.8rem 1.2rem; align-items: center; justify-content: center; border: 1px solid transparent; border-radius: 15px; font-weight: 780; text-decoration: none; transition: transform 160ms ease, box-shadow 160ms ease; }
.button:hover { transform: translateY(-2px); }
.button.primary { color: #fff; background: var(--moss-deep); box-shadow: 0 13px 30px rgba(23, 69, 54, 0.22); }
.button.secondary { border-color: var(--line); color: var(--moss-deep); background: rgba(255, 253, 248, 0.78); }
.requirements { margin: 1rem 0 0; color: var(--muted); font-size: 0.82rem; }
.app-preview { position: relative; min-height: 590px; }
.phone {
  position: absolute;
  z-index: 2;
  top: 0;
  left: 50%;
  width: min(340px, 78vw);
  padding: 10px;
  border: 2px solid #21302d;
  border-radius: 52px;
  background: #18231f;
  box-shadow: 0 40px 90px rgba(28, 52, 44, 0.28);
  transform: translateX(-50%) rotate(2deg);
}
.phone::before { position: absolute; z-index: 2; top: 18px; left: 50%; width: 92px; height: 25px; border-radius: 99px; background: #18231f; content: ""; transform: translateX(-50%); }
.phone-screen { min-height: 570px; padding: 20px 17px; border-radius: 42px; background: linear-gradient(145deg, #fffaf0, #e2f0e7); overflow: hidden; }
.status-row { display: flex; justify-content: space-between; padding: 0 10px 26px; font-size: 0.68rem; font-weight: 800; }
.app-heading { display: flex; gap: 0.8rem; align-items: center; }
.app-icon { display: grid; width: 50px; height: 50px; place-items: center; border-radius: 15px; color: #fff; background: var(--moss-deep); font-size: 1.45rem; font-weight: 900; }
.app-heading div { display: grid; gap: 0.1rem; }
.app-heading small, .progress-card small, .question-card small { color: var(--muted); font-size: 0.7rem; }
.app-heading strong { font-size: 1.1rem; }
.progress-card { display: flex; gap: 1rem; margin: 1.25rem 0; padding: 1rem; align-items: center; border: 1px solid rgba(39, 95, 76, 0.12); border-radius: 22px; background: rgba(255, 255, 255, 0.82); }
.progress-card > div:last-child { display: grid; gap: 0.2rem; }
.progress-card strong { font-size: 0.9rem; }
.progress-card span { color: var(--muted); font-size: 0.67rem; }
.ring { display: grid; flex: 0 0 64px; width: 64px; height: 64px; place-items: center; border-radius: 50%; background: conic-gradient(var(--moss) 0 72%, #d9e5de 72%); }
.ring::before { position: absolute; width: 46px; height: 46px; border-radius: 50%; background: #fff; content: ""; }
.ring span { position: relative; z-index: 1; color: var(--moss-deep); font-size: 0.75rem; font-weight: 850; }
.question-card { display: grid; gap: 0.75rem; padding: 1rem; border-radius: 22px; background: rgba(255, 255, 255, 0.86); }
.question-card > strong { font-size: 0.92rem; line-height: 1.5; }
.option { display: flex; min-height: 47px; padding: 0.7rem; align-items: center; border: 1px solid rgba(20, 33, 31, 0.16); border-radius: 13px; background: #fff; color: #44504d; font-size: 0.73rem; font-weight: 650; }
.option.selected { border: 2px solid var(--moss); color: var(--ink); background: var(--mint); }
.option b { margin-left: auto; color: var(--moss-deep); font-size: 1rem; }
.glow { position: absolute; border-radius: 50%; filter: blur(2px); }
.glow-coral { top: -20px; right: 5px; width: 250px; height: 250px; background: rgba(185, 76, 49, 0.2); }
.glow-mint { bottom: 5px; left: -20px; width: 280px; height: 280px; background: rgba(39, 95, 76, 0.18); }
.preview-note { position: absolute; z-index: 3; display: grid; gap: 0.15rem; padding: 0.85rem 1rem; border: 1px solid rgba(20, 33, 31, 0.12); border-radius: 17px; background: rgba(255, 253, 248, 0.95); box-shadow: var(--shadow); }
.preview-note b { font-size: 0.8rem; }
.preview-note span { color: var(--muted); font-size: 0.67rem; }
.note-one { top: 27%; left: -1rem; }
.note-two { right: -1rem; bottom: 17%; }
.proof { display: grid; grid-template-columns: repeat(3, 1fr); border-block: 1px solid var(--line); }
.proof div { display: grid; gap: 0.4rem; padding: 1.7rem; }
.proof div + div { border-left: 1px solid var(--line); }
.proof strong { color: var(--moss-deep); font-size: 1rem; }
.proof span { color: var(--muted); font-size: 0.85rem; }
.section { padding: clamp(5.5rem, 10vw, 9rem) 0; border-bottom: 1px solid var(--line); }
.section-heading { display: grid; grid-template-columns: 0.7fr 1.3fr; gap: 3rem; margin-bottom: 3rem; }
.section-heading h2 { grid-column: 2; }
.feature-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; }
.feature { min-height: 270px; padding: clamp(1.6rem, 4vw, 2.3rem); border: 1px solid var(--line); border-radius: 26px; background: rgba(255, 253, 248, 0.75); }
.feature-wide { grid-column: 1 / -1; min-height: 330px; background: linear-gradient(135deg, rgba(204, 233, 217, 0.9), rgba(255, 253, 248, 0.82)); }
.feature-number { color: var(--clay); font-size: 0.75rem; font-weight: 850; letter-spacing: 0.12em; }
.feature h3 { margin: 3rem 0 0.75rem; font-size: clamp(1.35rem, 3vw, 2rem); letter-spacing: -0.035em; }
.feature p { max-width: 680px; margin: 0; color: var(--muted); line-height: 1.75; }
.mini-list { display: flex; gap: 0.6rem; flex-wrap: wrap; margin-top: 2rem; }
.mini-list span { padding: 0.5rem 0.75rem; border: 1px solid rgba(39, 95, 76, 0.2); border-radius: 999px; color: var(--moss-deep); background: rgba(255, 255, 255, 0.55); font-size: 0.78rem; font-weight: 750; }
.focus-section, .privacy-section { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(3rem, 8vw, 8rem); align-items: center; }
.focus-copy > p:last-child, .privacy-copy > p { color: var(--muted); line-height: 1.8; }
.answer-demo { display: grid; gap: 0.8rem; }
.answer { display: grid; grid-template-columns: 42px 1fr 32px; gap: 0.8rem; min-height: 72px; padding: 0.9rem; align-items: center; border-radius: 18px; }
.answer span { display: grid; width: 40px; height: 40px; place-items: center; border-radius: 50%; font-weight: 900; }
.answer b { font-size: 0.92rem; }
.answer i { font-size: 1.2rem; font-style: normal; font-weight: 900; text-align: center; }
.answer.neutral { border: 1px solid var(--line); background: var(--surface); }
.answer.neutral span { color: var(--muted); background: #eef0ed; }
.answer.correct { border: 3px solid var(--moss); background: var(--mint); }
.answer.correct span { color: #fff; background: var(--moss-deep); }
.answer.correct i { color: var(--moss-deep); }
.answer.wrong { border: 3px solid var(--clay); background: var(--clay-soft); }
.answer.wrong span { color: #fff; background: var(--clay); }
.answer.wrong i { color: var(--clay); }
.privacy-copy a { color: var(--moss-deep); font-weight: 760; text-underline-offset: 4px; }
.ad-note { padding: 1rem; border-left: 4px solid var(--sand); background: rgba(255, 253, 248, 0.68); }
.download { display: flex; gap: 3rem; min-height: 390px; padding: clamp(4rem, 9vw, 7rem); align-items: center; justify-content: space-between; border-radius: 38px; margin: clamp(4rem, 9vw, 8rem) 0; color: #fff; background: var(--moss-deep); overflow: hidden; }
.download .eyebrow { color: #bfe7d4; }
.download p:not(.eyebrow) { color: #d3e7de; }
.download .button.primary { color: var(--moss-deep); background: #fff; box-shadow: none; }
footer { display: grid; grid-template-columns: 1fr auto auto; gap: 2rem; min-height: 150px; align-items: center; border-top: 1px solid var(--line); }
footer p { margin: 0; color: var(--muted); font-size: 0.8rem; }
a:focus-visible { outline: 3px solid rgba(185, 76, 49, 0.55); outline-offset: 4px; }

@media (max-width: 900px) {
  .site-header, main, footer { width: min(100% - 32px, 700px); }
  .hero { grid-template-columns: 1fr; min-height: auto; }
  .app-preview { min-height: 620px; }
  .note-one { left: 3%; }
  .note-two { right: 3%; }
  .section-heading, .focus-section, .privacy-section { grid-template-columns: 1fr; }
  .section-heading h2 { grid-column: 1; }
  footer { grid-template-columns: 1fr auto; }
  footer p { grid-column: 1 / -1; }
}

@media (max-width: 580px) {
  .site-header { min-height: 76px; }
  nav a:not(:last-child) { display: none; }
  h1 { font-size: clamp(3rem, 16vw, 4.5rem); }
  .hero { padding: 4rem 0; }
  .actions .button { width: 100%; }
  .app-preview { min-height: 575px; }
  .phone-screen { min-height: 530px; }
  .preview-note { display: none; }
  .proof { grid-template-columns: 1fr; }
  .proof div + div { border-top: 1px solid var(--line); border-left: 0; }
  .feature-grid { grid-template-columns: 1fr; }
  .feature-wide { grid-column: 1; }
  .download { align-items: flex-start; flex-direction: column; border-radius: 28px; }
  footer { grid-template-columns: 1fr; padding: 2.5rem 0; }
  .footer-links { align-items: flex-start; flex-direction: column; gap: 0.7rem; }
  footer p { grid-column: 1; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: 0.01ms !important; }
}