:root {
  --brand: #006241;
  --brand-accent: #00754A;
  --brand-accent-2: #00945B;
  --house: #1E3932;
  --house-2: #15302A;
  --wash: #D4E9E2;
  --wash-soft: #E8F5F0;
  --wash-2: #F3FAF7;
  --ink: #1A2A24;
  --body: #3F4A46;
  --muted: #6A756F;
  --line: #DCE6E1;
  --canvas: #FFFFFF;
  --stage: #E6EEEA;
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text",
    "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", sans-serif;
  --shadow: 0 1px 2px rgba(16, 42, 34, .05), 0 8px 20px rgba(16, 42, 34, .06);
  --shadow-lg: 0 18px 40px rgba(16, 42, 34, .14);
  --r: 18px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--stage);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
em { font-style: normal; }

.page {
  width: min(750px, 100%);
  margin: 0 auto;
  background: var(--canvas);
  box-shadow: 0 0 0 1px rgba(16, 42, 34, .04), var(--shadow-lg);
  padding-bottom: 88px;
}

/* ---------- top ---------- */
.top {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  gap: 10px;
  height: 52px;
  padding: 0 14px;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.top-back {
  width: 36px; height: 36px;
  display: grid; place-items: center;
  color: var(--house);
  border-radius: 10px;
}
.top-brand {
  display: flex; align-items: center; gap: 8px;
  font-weight: 700; font-size: 15px; color: var(--house);
  flex: 1;
}
.mark { flex: none; }
.top-link {
  font-size: 13px; font-weight: 600;
  color: var(--brand);
  padding: 6px 10px;
}

/* ---------- hero ---------- */
.hero {
  padding: 36px 22px 8px;
  background:
    radial-gradient(120% 80% at 80% 0%, rgba(0,148,91,.16), transparent 55%),
    linear-gradient(180deg, #F3FAF7 0%, #FFFFFF 72%);
  text-align: center;
}
.hero-eyebrow {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--brand);
  margin-bottom: 12px;
}
.hero h1 {
  font-size: clamp(28px, 7vw, 40px);
  line-height: 1.18;
  letter-spacing: -.04em;
  font-weight: 800;
  color: var(--house);
}
.hero h1 em { color: var(--brand); }
.pill {
  display: inline-flex;
  align-items: center;
  margin-top: 14px;
  padding: 7px 14px;
  border-radius: 999px;
  background: var(--wash);
  color: var(--brand);
  font-size: 13px;
  font-weight: 700;
}
.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin: 22px 0 8px;
}
.hero-stats div {
  padding: 12px 6px;
  border-radius: 14px;
  background: rgba(255,255,255,.7);
  border: 1px solid rgba(30,57,50,.06);
}
.hero-stats dt {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -.03em;
  color: var(--house);
}
.hero-stats dd {
  font-size: 12px;
  color: var(--muted);
  margin-top: 2px;
}

.hero-stage { display: flex; justify-content: center; margin-top: 10px; }
.phone {
  width: min(280px, 72%);
  background: var(--house);
  border-radius: 32px;
  padding: 12px 10px 16px;
  box-shadow: var(--shadow-lg);
}
.phone-notch {
  width: 72px; height: 8px; border-radius: 999px;
  background: #0d1f1a; margin: 0 auto 8px;
}
.phone-screen {
  background: #0f241e;
  border-radius: 22px;
  overflow: hidden;
}
.mock-player { position: relative; padding: 10px 10px 12px; }
.mock-badge, .ph-tag {
  display: inline-block;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .04em;
  color: #E8F5F0;
  background: rgba(255,255,255,.12);
  border: 1px dashed rgba(255,255,255,.28);
  border-radius: 999px;
  padding: 3px 8px;
  margin-bottom: 8px;
}
.mock-video {
  height: 132px;
  border-radius: 12px;
  background:
    linear-gradient(135deg, rgba(0,148,91,.35), rgba(30,57,50,.2)),
    repeating-linear-gradient(-12deg, transparent, transparent 10px, rgba(255,255,255,.03) 10px, rgba(255,255,255,.03) 20px);
  display: grid; place-items: center;
}
.mock-play, .ph-play {
  width: 36px; height: 36px; border-radius: 50%;
  background: #fff;
  position: relative;
}
.mock-play::after, .ph-play::after {
  content: "";
  position: absolute; left: 14px; top: 11px;
  border-style: solid;
  border-width: 7px 0 7px 12px;
  border-color: transparent transparent transparent var(--brand);
}
.mock-subs { text-align: left; padding: 10px 4px 6px; }
.mock-subs .en { color: #fff; font-weight: 700; font-size: 13px; }
.mock-subs .zh { color: #B7C9C1; font-size: 12px; margin-top: 2px; }
.mock-subs mark {
  background: rgba(0,148,91,.45);
  color: #fff;
  border-radius: 4px;
  padding: 0 3px;
}
.mock-tabs {
  display: flex; gap: 6px;
  padding-top: 4px;
}
.mock-tabs span {
  flex: 1;
  text-align: center;
  font-size: 11px;
  font-weight: 600;
  color: #8AA097;
  padding: 6px 0;
  border-radius: 8px;
}
.mock-tabs .on { background: var(--brand); color: #fff; }

.strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  font-size: 12px;
  color: var(--body);
}
.strip span {
  background: var(--wash-2);
  padding: 10px 6px;
  text-align: center;
}
.strip b { color: var(--brand); font-weight: 700; }

/* ---------- blocks ---------- */
.block { padding: 40px 20px 36px; }
.block-wash { background: linear-gradient(180deg, var(--wash-2), #fff 80%); }
.block-head { text-align: center; margin-bottom: 22px; }
.block-head h2 {
  font-size: clamp(24px, 6vw, 32px);
  line-height: 1.2;
  letter-spacing: -.03em;
  font-weight: 800;
  color: var(--house);
}
.block-head .pill { margin-top: 10px; }
.block-lead {
  margin: 10px auto 0;
  max-width: 34em;
  font-size: 14px;
  color: var(--muted);
}

/* ---------- video wall ---------- */
.vgrid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.vcard {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: var(--shadow);
}
.vcover { position: relative; aspect-ratio: 16 / 9; background: var(--wash); }
.vcover img { width: 100%; height: 100%; object-fit: cover; }
.vfree, .vdiff, .vdur {
  position: absolute;
  font-size: 10px;
  font-weight: 700;
  border-radius: 999px;
  padding: 3px 7px;
  color: #fff;
}
.vfree { top: 8px; left: 8px; background: var(--brand); }
.vdiff { top: 8px; right: 8px; background: rgba(21,48,42,.72); }
.vdiff.beg { background: #2E7D4F; }
.vdiff.mid { background: #1E6B8A; }
.vdiff.adv { background: #6B3FA0; }
.vdur { right: 8px; bottom: 8px; background: rgba(0,0,0,.55); }
.vcard h3 {
  font-size: 13px;
  line-height: 1.4;
  font-weight: 700;
  padding: 8px 10px 2px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 2.8em;
}
.vmeta {
  display: flex; gap: 8px; flex-wrap: wrap;
  padding: 0 10px 10px;
  font-size: 11px; color: var(--muted);
}
.vmeta span {
  background: var(--wash-2);
  border-radius: 999px;
  padding: 2px 7px;
}
.more {
  display: block;
  text-align: center;
  margin-top: 18px;
  font-size: 14px;
  font-weight: 700;
  color: var(--brand);
}

/* ---------- cats ---------- */
.cats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}
.cat {
  display: grid;
  grid-template-columns: 40px 1fr;
  grid-template-rows: auto auto;
  column-gap: 10px;
  align-items: center;
  padding: 12px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 16px;
  box-shadow: var(--shadow);
}
.cat-ico {
  grid-row: 1 / span 2;
  width: 40px; height: 40px;
  border-radius: 12px;
  display: grid; place-items: center;
  background: var(--wash);
  color: var(--brand);
  font-weight: 800;
  font-size: 14px;
}
.cat strong { font-size: 14px; color: var(--house); }
.cat em { font-size: 12px; color: var(--muted); }

/* ---------- channels ---------- */
.channels {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}
.ch {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 12px;
  box-shadow: var(--shadow);
}
.ch-top { display: flex; gap: 10px; align-items: center; }
.avatar {
  width: 40px; height: 40px; border-radius: 50%;
  display: grid; place-items: center;
  background: linear-gradient(135deg, var(--brand-accent-2), var(--brand));
  color: #fff; font-weight: 800; flex: none;
}
.ch-top h3 { font-size: 13px; line-height: 1.25; }
.ch-top p { font-size: 11px; color: var(--muted); }
.ch-bio { font-size: 12px; color: var(--body); margin: 8px 0 8px; }
.ch-tags { display: flex; flex-wrap: wrap; gap: 4px; }
.ch-tags span {
  font-size: 10px; font-weight: 700;
  color: var(--brand);
  background: var(--wash-soft);
  border-radius: 999px;
  padding: 2px 7px;
}

/* ---------- features ---------- */
.feats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}
.feats li {
  display: flex;
  align-items: center;
  gap: 8px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 10px 10px;
  font-size: 12.5px;
  font-weight: 700;
  color: var(--house);
  box-shadow: var(--shadow);
}
.feats i {
  flex: none;
  display: grid; place-items: center;
  width: 30px; height: 30px;
  border-radius: 9px;
  background: var(--wash);
}
.feats svg {
  width: 16px; height: 16px;
  stroke: var(--brand);
  fill: none;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* ---------- studio / placeholders ---------- */
.studio {
  display: grid;
  gap: 12px;
}
.ph {
  position: relative;
  border-radius: var(--r);
  background:
    linear-gradient(180deg, #1E3932, #15302A);
  color: #E8F5F0;
  padding: 14px;
  min-height: 160px;
  overflow: hidden;
}
.ph::after {
  content: "";
  position: absolute; inset: 0;
  background-image: repeating-linear-gradient(
    -18deg,
    transparent,
    transparent 8px,
    rgba(255,255,255,.03) 8px,
    rgba(255,255,255,.03) 16px
  );
  pointer-events: none;
}
.ph-player { min-height: 260px; }
.ph-video {
  height: 140px;
  border-radius: 12px;
  background: rgba(255,255,255,.06);
  display: grid; place-items: center;
  margin-bottom: 10px;
}
.ph-line { display: grid; gap: 6px; }
.ph-cue {
  font-size: 13px;
  padding: 8px 10px;
  border-radius: 10px;
  background: rgba(255,255,255,.06);
  color: #B7C9C1;
}
.ph-cue.on { background: rgba(0,148,91,.35); color: #fff; font-weight: 700; }
.ph-tools { display: flex; gap: 6px; margin-top: 10px; }
.ph-tools span {
  font-size: 11px; font-weight: 700;
  padding: 5px 8px; border-radius: 999px;
  background: rgba(255,255,255,.08);
}
.ph-tools .on { background: var(--brand-accent-2); color: #fff; }
.ph-card { min-height: 220px; }
.ph-word { font-size: 28px; font-weight: 800; letter-spacing: -.03em; margin-top: 8px; }
.ph-ipa { color: #B7C9C1; font-size: 13px; }
.ph-cefr {
  display: inline-block;
  margin: 8px 0;
  font-size: 11px; font-weight: 800;
  background: rgba(0,148,91,.35);
  padding: 2px 8px; border-radius: 999px;
}
.ph-gloss { font-size: 15px; font-weight: 700; }
.ph-ex { font-size: 13px; color: #C9D8D2; margin: 8px 0 14px; }
.ph-btn {
  display: inline-block;
  background: var(--brand-accent-2);
  color: #fff;
  font-size: 13px; font-weight: 700;
  padding: 8px 14px; border-radius: 999px;
}

/* ---------- steps ---------- */
.steps { display: grid; gap: 10px; }
.steps li {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 12px;
  align-items: start;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 14px;
  box-shadow: var(--shadow);
}
.steps span {
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -.04em;
  color: var(--brand);
}
.steps h3 { font-size: 15px; }
.steps p { font-size: 13px; color: var(--muted); margin-top: 2px; }

/* ---------- review tiles ---------- */
.rev {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}
.ph-tile { min-height: 140px; }
.ph-tile strong { display: block; font-size: 16px; margin: 18px 0 6px; }
.ph-tile p { font-size: 12px; color: #B7C9C1; }

/* ---------- devices ---------- */
.devices {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}
.device {
  background: var(--house);
  border-radius: 20px;
  padding: 12px 10px 14px;
  text-align: center;
  color: #E8F5F0;
}
.device .ph-tag { margin-bottom: 8px; }
.device-screen {
  border-radius: 10px;
  background:
    linear-gradient(180deg, rgba(232,245,240,.16), rgba(232,245,240,.04)),
    repeating-linear-gradient(-18deg, transparent, transparent 8px, rgba(255,255,255,.04) 8px, rgba(255,255,255,.04) 16px);
  margin-bottom: 10px;
}
.phone-frame .device-screen { height: 180px; }
.tablet-frame .device-screen { height: 140px; }
.desk-frame .device-screen { height: 110px; }
.device p { font-size: 12px; font-weight: 700; }
.dev-note {
  text-align: center;
  margin-top: 16px;
  font-size: 13px;
  color: var(--muted);
}
.dev-note a { color: var(--brand); font-weight: 700; }

/* ---------- start ---------- */
.start-grid { display: grid; gap: 12px; }
.start-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 16px;
  box-shadow: var(--shadow);
}
.start-card h3 { font-size: 17px; margin-bottom: 10px; }
.start-card ol { list-style: decimal; padding-left: 18px; }
.start-card li { font-size: 13.5px; color: var(--body); margin: 6px 0; }
.start-card a { color: var(--brand); font-weight: 700; }
.ph-shot {
  margin-top: 14px;
  min-height: 120px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}
.ph-shot p { font-size: 13px; color: #C9D8D2; }

/* ---------- plans ---------- */
.plans { display: grid; gap: 12px; }
.plan {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 18px 16px;
  box-shadow: var(--shadow);
}
.plan-on {
  background: var(--house);
  color: #F3FAF7;
  border-color: transparent;
}
.plan h3 { font-size: 20px; margin-bottom: 10px; }
.plan ul { margin-bottom: 16px; }
.plan li {
  font-size: 14px;
  padding: 5px 0 5px 18px;
  position: relative;
}
.plan li::before {
  content: "";
  position: absolute; left: 0; top: 12px;
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--brand-accent-2);
}
.plan-on li::before { background: #7DCEA0; }
.plan-tag {
  display: inline-block;
  font-size: 11px; font-weight: 800;
  background: var(--brand-accent-2);
  color: #fff;
  border-radius: 999px;
  padding: 3px 8px;
  margin-bottom: 8px;
}
.btn {
  display: flex; align-items: center; justify-content: center;
  height: 44px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 15px;
}
.btn-fill { background: var(--brand-accent-2); color: #fff; }
.btn-ghost {
  background: #fff;
  color: var(--brand);
  border: 1.5px solid var(--brand);
}
.plan-on .btn-fill { background: #fff; color: var(--house); }

/* ---------- footer ---------- */
.foot {
  padding: 28px 20px 20px;
  text-align: center;
  border-top: 1px solid var(--line);
}
.foot .top-brand { justify-content: center; margin-bottom: 8px; }
.foot p { font-size: 13px; color: var(--muted); }
.foot-links { display: flex; justify-content: center; gap: 16px; margin: 10px 0; }
.foot-links a { color: var(--brand); font-weight: 700; }
.copy { font-size: 12px; }

/* ---------- buy bar ---------- */
.bar {
  position: fixed;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  width: min(750px, 100%);
  z-index: 40;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px calc(8px + env(safe-area-inset-bottom));
  background: rgba(255,255,255,.96);
  backdrop-filter: blur(14px);
  border-top: 1px solid var(--line);
  box-shadow: 0 -8px 24px rgba(16,42,34,.06);
}
.bar-side {
  width: 48px;
  display: grid;
  justify-items: center;
  gap: 2px;
  font-size: 10px;
  color: var(--muted);
  font-weight: 600;
}
.bar-side svg { width: 20px; height: 20px; }
.bar-buy { flex: 1; display: flex; gap: 8px; }
.bar-buy a {
  flex: 1;
  height: 44px;
  border-radius: 999px;
  display: grid; place-items: center;
  font-weight: 800;
  font-size: 15px;
}
.bar-buy .ghost {
  background: var(--wash-soft);
  color: var(--brand);
}
.bar-buy .fill {
  background: linear-gradient(135deg, var(--brand-accent-2), var(--brand));
  color: #fff;
  box-shadow: 0 8px 18px rgba(0,117,74,.28);
}

@media (min-width: 720px) {
  .vgrid { grid-template-columns: repeat(3, 1fr); }
  .feats { grid-template-columns: repeat(3, 1fr); }
  .studio { grid-template-columns: 1.15fr .85fr; align-items: stretch; }
  .start-grid { grid-template-columns: 1fr 1fr; }
  .plans { grid-template-columns: 1fr 1fr; }
  .devices { grid-template-columns: 1fr 1.15fr 1.35fr; align-items: end; }
  .hero { padding: 48px 36px 12px; }
  .block { padding: 48px 28px 40px; }
}