:root {
  color-scheme: light dark;
  --ink: #142120; --muted: #566866; --line: #dde5e3; --bg: #f7faf9; --card: #ffffff;
  --accent: #156b66; --accent-ink: #ffffff; --accent-soft: #e2f0ee; --deep: #0f4f4b;
}
@media (prefers-color-scheme: dark) {
  :root { --ink: #e8efee; --muted: #9fb0ad; --line: #2a3634; --bg: #0e1514; --card: #16201f;
    --accent: #4fb3a9; --accent-ink: #062321; --accent-soft: #17302d; --deep: #0b2826; }
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--ink); line-height: 1.6;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", "PingFang HK", "Noto Sans TC", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased; }
img { max-width: 100%; display: block; }
a { color: var(--accent); }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 20px; }

/* Nav */
header.nav { position: sticky; top: 0; z-index: 10; backdrop-filter: saturate(1.6) blur(14px);
  background: color-mix(in srgb, var(--bg) 82%, transparent); border-bottom: 1px solid var(--line); }
header.nav .wrap { display: flex; align-items: center; gap: 20px; height: 62px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.1rem; color: var(--ink); text-decoration: none; }
.brand img { width: 32px; height: 32px; border-radius: 8px; }
header.nav nav { margin-left: auto; display: flex; gap: 22px; align-items: center; }
header.nav nav a { color: var(--muted); text-decoration: none; font-size: .95rem; }
header.nav nav a:hover { color: var(--ink); }
header.nav nav a.lang { border: 1px solid var(--line); padding: 4px 12px; border-radius: 999px; color: var(--ink); }
@media (max-width: 720px) { header.nav nav a:not(.lang) { display: none; } }

/* Hero */
.hero { padding: 72px 0 40px; overflow: hidden; }
.hero .wrap { display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items: center; }
.eyebrow { display: inline-block; font-size: .82rem; font-weight: 600; letter-spacing: .04em; color: var(--accent);
  background: var(--accent-soft); padding: 5px 12px; border-radius: 999px; }
h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); line-height: 1.1; letter-spacing: -.02em; margin: 18px 0 18px; }
.lead { font-size: 1.18rem; color: var(--muted); max-width: 34em; margin: 0 0 28px; }
.cta { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; }
.store-badge { display: inline-flex; align-items: center; gap: 10px; background: #000; color: #fff; text-decoration: none;
  padding: 10px 20px 10px 16px; border-radius: 12px; border: 1px solid #333; }
.store-badge svg { width: 26px; height: 26px; fill: #fff; }
.store-badge small { display: block; font-size: .7rem; opacity: .85; line-height: 1.1; }
.store-badge strong { display: block; font-size: 1.15rem; line-height: 1.15; font-weight: 600; }
.btn-ghost { color: var(--ink); text-decoration: none; font-weight: 600; padding: 12px 6px; }
.note { font-size: .88rem; color: var(--muted); margin-top: 14px; }

.phone { position: relative; width: min(330px, 78vw); margin: 0 auto; border-radius: 48px; padding: 10px;
  background: #101716; box-shadow: 0 30px 80px -20px rgba(15, 79, 75, .45), 0 0 0 1px rgba(255,255,255,.06) inset; }
.phone img { border-radius: 39px; width: 100%; height: auto; }
.hero .phone { transform: rotate(2deg); }
.hero-art { position: relative; }
.hero-art::before { content: ""; position: absolute; inset: 8% -10% 0; border-radius: 50%;
  background: radial-gradient(closest-side, var(--accent-soft), transparent); z-index: -1; }

/* Sources strip */
.sources { padding: 24px 0 8px; }
.sources p { text-align: center; color: var(--muted); font-size: .9rem; margin: 0 0 14px; }
.chips { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; list-style: none; padding: 0; margin: 0; }
.chips li { background: var(--card); border: 1px solid var(--line); padding: 8px 16px; border-radius: 999px; font-weight: 600; font-size: .95rem; }

/* Sections */
section { padding: 72px 0; }
h2 { font-size: clamp(1.7rem, 3.4vw, 2.4rem); line-height: 1.2; letter-spacing: -.01em; margin: 0 0 14px; }
.section-head { text-align: center; max-width: 680px; margin: 0 auto 44px; }
.section-head p { color: var(--muted); font-size: 1.08rem; margin: 0; }

.grid3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 20px; padding: 24px; }
.card h3 { margin: 12px 0 6px; font-size: 1.1rem; }
.card p { margin: 0; color: var(--muted); }
.icon { width: 42px; height: 42px; border-radius: 12px; display: grid; place-items: center; background: var(--accent-soft); color: var(--accent); }
.icon svg { width: 22px; height: 22px; stroke: currentColor; fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }

.feature { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; padding: 36px 0; }
.feature.flip .text { order: 2; }
.feature .text h3 { font-size: clamp(1.5rem, 2.8vw, 2rem); line-height: 1.2; margin: 10px 0 12px; }
.feature .text p { color: var(--muted); font-size: 1.06rem; }
.feature ul { padding: 0; list-style: none; margin: 18px 0 0; }
.feature li { padding-left: 28px; position: relative; margin: 8px 0; }
.feature li::before { content: ""; position: absolute; left: 0; top: .45em; width: 16px; height: 16px; border-radius: 50%;
  background: var(--accent-soft) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M4 8.2l2.6 2.5L12 5.5' stroke='%23156b66' stroke-width='2' fill='none' stroke-linecap='round'/%3E%3C/svg%3E") center/12px no-repeat; }
.feature .phone { width: min(300px, 74vw); }

.steps { counter-reset: s; }
.steps .card { position: relative; padding-top: 58px; }
.steps .card::before { counter-increment: s; content: counter(s); position: absolute; top: 20px; left: 24px; width: 30px; height: 30px;
  border-radius: 50%; background: var(--accent); color: var(--accent-ink); font-weight: 700; display: grid; place-items: center; }

.band { background: var(--deep); color: #e9f4f2; border-radius: 28px; padding: 48px; }
.band h2 { color: #fff; }
.band p, .band li { color: #c4dcd8; }
.band .grid3 .card { background: rgba(255,255,255,.06); border-color: rgba(255,255,255,.12); }
.band .grid3 .card h3 { color: #fff; }
.band .grid3 .card p { color: #c4dcd8; }

.pricing { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; max-width: 820px; margin: 0 auto; }
.pricing .card h3 { font-size: 1.3rem; margin-top: 0; }
.pricing .price { font-size: 1.05rem; font-weight: 700; color: var(--accent); margin: 0 0 10px; }
.pricing ul { padding-left: 1.1em; margin: 12px 0 0; color: var(--muted); }

.faq { max-width: 780px; margin: 0 auto; }
.faq details { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 4px 22px; margin-bottom: 12px; }
.faq summary { cursor: pointer; font-weight: 600; padding: 16px 0; list-style: none; position: relative; padding-right: 28px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 0; top: 12px; font-size: 1.4rem; color: var(--accent); }
.faq details[open] summary::after { content: "–"; }
.faq details p { margin: 0 0 18px; color: var(--muted); }

.final { text-align: center; }
.final .cta { justify-content: center; }

footer { border-top: 1px solid var(--line); padding: 36px 0 48px; color: var(--muted); font-size: .9rem; }
footer .wrap { display: flex; flex-wrap: wrap; gap: 14px 28px; align-items: center; }
footer nav { display: flex; gap: 20px; margin-left: auto; }
footer a { color: var(--muted); }
footer .legal { flex-basis: 100%; font-size: .8rem; }

@media (max-width: 860px) {
  .hero { padding-top: 44px; }
  .hero .wrap, .feature { grid-template-columns: 1fr; gap: 36px; }
  .feature.flip .text { order: 0; }
  .grid3, .pricing { grid-template-columns: 1fr; }
  .band { padding: 32px 22px; border-radius: 22px; }
  section { padding: 52px 0; }
  .hero .phone { transform: none; }
  footer nav { margin-left: 0; }
}

/* Widget illustration */
.widgets { display: flex; flex-wrap: wrap; gap: 18px; justify-content: center; align-items: flex-start;
  padding: 36px 24px; border-radius: 28px; background: linear-gradient(140deg, #2c8a82, #0f4f4b 70%); }
.widget { background: rgba(255,255,255,.94); color: #142120; border-radius: 22px; padding: 14px 16px; display: flex; gap: 16px;
  box-shadow: 0 12px 30px -12px rgba(0,0,0,.35); height: 158px; }
.w-small { width: 158px; }
.w-medium { width: min(338px, 100%); }
.w-left { display: flex; flex-direction: column; min-width: 0; }
.w-left small { font-size: .74rem; color: #566866; font-weight: 600; }
.w-left strong { font-size: 1.35rem; letter-spacing: -.01em; margin-top: 4px; }
.w-left em { font-style: normal; font-size: .76rem; font-weight: 600; color: #156b66; background: #e2f0ee; border-radius: 999px; padding: 1px 8px; align-self: flex-start; margin-top: 4px; }
.w-left .w-upd { margin-top: auto; font-weight: 400; }
.w-right { flex: 1; display: flex; flex-direction: column; gap: 9px; font-size: .74rem; padding-top: 2px; }
.w-row { display: grid; grid-template-columns: 1fr auto; row-gap: 3px; }
.w-row span { color: #566866; }
.w-row i { grid-column: 1 / -1; height: 5px; border-radius: 3px; background: linear-gradient(90deg, #156b66 var(--w), #e4ebe9 var(--w)); }
.w-missing b { color: #8a9a97; font-weight: 500; }
.w-missing i { background: none; border-top: 2px dashed #c9d3d1; height: 0; }
.w-note { flex-basis: 100%; text-align: center; color: #cfe5e1; font-size: .8rem; margin: 0; }
@media (max-width: 420px) { .w-medium .w-left strong { font-size: 1.1rem; } .widget { gap: 12px; } }