:root {
  --red: #e6392f;
  --red-dark: #b91f19;
  --ink: #19212d;
  --muted: #667085;
  --line: #e7eaf0;
  --blue-soft: #edf8ff;
  --red-soft: #fff1ef;
  --cream: #fffaf7;
  --white: #ffffff;
  --shadow: 0 24px 60px rgba(25, 33, 45, .12);
  --radius: 24px;
  --container: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: #fff;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  line-height: 1.65;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, a { -webkit-tap-highlight-color: transparent; }
.container { width: min(var(--container), calc(100% - 40px)); margin-inline: auto; }
.section-pad { padding: 104px 0; position: relative; }
.section-soft { background: linear-gradient(180deg, #f8fcff 0%, #fff 100%); }
.section-dark { background: #111827; color: #fff; overflow: hidden; }
.skip-link { position: fixed; left: 16px; top: -60px; z-index: 100; background: #111827; color: #fff; padding: 10px 16px; border-radius: 8px; }
.skip-link:focus { top: 16px; }

.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.92);
  border-bottom: 1px solid rgba(231,234,240,.9);
  backdrop-filter: blur(18px);
}
.nav-wrap { min-height: 78px; display: flex; align-items: center; gap: 22px; }
.brand { display: flex; align-items: center; gap: 12px; margin-right: auto; }
.brand img { width: 50px; height: 50px; border-radius: 50%; box-shadow: 0 8px 22px rgba(230,57,47,.18); }
.brand span { display: grid; line-height: 1.15; }
.brand strong { font-size: 16px; }
.brand small { color: var(--muted); margin-top: 5px; font-size: 12px; }
.site-nav { display: flex; align-items: center; gap: 24px; font-size: 14px; font-weight: 700; }
.site-nav a { padding: 8px 0; position: relative; }
.site-nav a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: 2px; height: 2px; background: var(--red); transition: .25s; }
.site-nav a:hover::after { right: 0; }
.language-toggle, .menu-toggle { border: 1px solid var(--line); background: #fff; color: var(--ink); border-radius: 999px; font-weight: 800; cursor: pointer; }
.language-toggle { padding: 9px 14px; }
.menu-toggle { display: none; width: 42px; height: 42px; font-size: 20px; }

.hero { min-height: 760px; display: flex; align-items: center; background: radial-gradient(circle at 10% 20%, rgba(230,57,47,.08), transparent 30%), linear-gradient(180deg, #fff 0%, #fbfdff 100%); overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; align-items: center; gap: 70px; position: relative; z-index: 2; }
.hero h1 { font-size: clamp(48px, 6.6vw, 84px); line-height: 1.02; letter-spacing: -.055em; margin: 18px 0 26px; max-width: 780px; }
.hero-lead { font-size: 19px; color: var(--muted); max-width: 700px; margin: 0 0 28px; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; color: var(--red-dark); background: var(--red-soft); border: 1px solid #ffd7d2; border-radius: 999px; padding: 7px 12px; font-size: 13px; font-weight: 900; letter-spacing: .02em; }
.hero-badges { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 28px; }
.hero-badges span { background: #fff; border: 1px solid var(--line); border-radius: 999px; padding: 8px 12px; color: #475467; font-size: 13px; font-weight: 700; box-shadow: 0 8px 20px rgba(17,24,39,.05); }
.store-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.store-button { min-width: 184px; display: flex; align-items: center; gap: 12px; padding: 13px 16px; border-radius: 15px; background: #111827; color: #fff; box-shadow: 0 12px 28px rgba(17,24,39,.16); transition: transform .2s, box-shadow .2s; }
.store-button:hover { transform: translateY(-2px); box-shadow: 0 16px 34px rgba(17,24,39,.2); }
.store-button span:last-child { display: grid; line-height: 1.15; }
.store-button small { font-size: 9px; letter-spacing: .08em; opacity: .75; }
.store-button strong { font-size: 17px; }
.store-mark { display: grid; place-items: center; width: 32px; height: 32px; border-radius: 9px; background: rgba(255,255,255,.12); }
.store-button-muted { background: #fff; color: var(--ink); border: 1px solid var(--line); box-shadow: none; opacity: .72; cursor: default; }
.store-button-muted:hover { transform: none; box-shadow: none; }
.microcopy { font-size: 12px; color: #7b8492; max-width: 680px; margin-top: 18px; }
.hero-visual { position: relative; padding: 26px 12px; }
.device-shell { background: #101828; padding: 15px; border-radius: 28px; box-shadow: var(--shadow); transform: rotate(1.8deg); }
.device-shell img { border-radius: 17px; width: 100%; }
.device-bar { display: flex; gap: 6px; padding: 0 4px 11px; }
.device-bar span { width: 7px; height: 7px; border-radius: 50%; background: #d0d5dd; opacity: .6; }
.floating-card { position: absolute; background: rgba(255,255,255,.94); border: 1px solid rgba(255,255,255,.7); border-radius: 18px; padding: 15px 18px; box-shadow: 0 18px 36px rgba(17,24,39,.14); backdrop-filter: blur(14px); max-width: 245px; }
.floating-card strong, .floating-card span { display: block; }
.floating-card strong { font-size: 14px; }
.floating-card span { font-size: 12px; color: var(--muted); margin-top: 3px; }
.floating-card-top { right: -26px; top: 6px; }
.floating-card-bottom { left: -34px; bottom: -5px; }
.hero-glow { position: absolute; border-radius: 50%; filter: blur(2px); opacity: .65; }
.hero-glow-one { width: 340px; height: 340px; right: -90px; top: 110px; background: rgba(73,184,255,.12); }
.hero-glow-two { width: 220px; height: 220px; left: -80px; bottom: -50px; background: rgba(230,57,47,.08); }

.proof-strip { border-block: 1px solid var(--line); background: #fff; }
.proof-grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.proof-grid > div { padding: 28px 22px; display: grid; grid-template-columns: auto 1fr; align-items: center; gap: 12px; border-right: 1px solid var(--line); }
.proof-grid > div:last-child { border-right: 0; }
.proof-grid strong { font-size: 28px; color: var(--red); }
.proof-grid span { font-size: 13px; color: var(--muted); line-height: 1.35; }

.section-heading { max-width: 790px; margin-bottom: 54px; }
.section-heading h2 { font-size: clamp(36px, 5vw, 58px); line-height: 1.08; letter-spacing: -.04em; margin: 17px 0 16px; }
.section-heading p { font-size: 18px; color: var(--muted); margin: 0; }
.section-heading-light p { color: #b7c0cd; }
.feature-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.feature-card { border: 1px solid var(--line); border-radius: var(--radius); padding: 30px; background: #fff; box-shadow: 0 12px 30px rgba(17,24,39,.05); transition: .25s; }
.feature-card:hover { transform: translateY(-6px); box-shadow: 0 20px 44px rgba(17,24,39,.1); }
.feature-icon { width: 50px; height: 50px; display: grid; place-items: center; border-radius: 15px; background: var(--red-soft); color: var(--red); font-weight: 900; font-size: 20px; }
.feature-card h3 { margin: 22px 0 10px; font-size: 19px; line-height: 1.25; }
.feature-card p { color: var(--muted); margin: 0; font-size: 14px; }

.mode-stack { display: grid; gap: 86px; }
.mode-row { display: grid; grid-template-columns: .82fr 1.18fr; align-items: center; gap: 70px; }
.mode-row-reverse { grid-template-columns: 1.18fr .82fr; }
.mode-row-reverse .mode-copy { order: 2; }
.mode-number { color: var(--red); font-weight: 900; letter-spacing: .12em; font-size: 13px; }
.mode-copy h3 { font-size: clamp(32px, 4vw, 48px); letter-spacing: -.035em; line-height: 1.1; margin: 10px 0 18px; }
.mode-copy p { color: var(--muted); font-size: 17px; }
.check-list { list-style: none; padding: 0; margin: 25px 0 0; display: grid; gap: 11px; }
.check-list li { position: relative; padding-left: 28px; font-size: 14px; font-weight: 700; }
.check-list li::before { content: "✓"; position: absolute; left: 0; top: 0; width: 19px; height: 19px; display: grid; place-items: center; border-radius: 50%; color: #fff; background: var(--red); font-size: 12px; }
.mode-image { background: #dff4ff; padding: 18px; border-radius: 30px; box-shadow: 0 24px 56px rgba(17,24,39,.12); }
.mode-image img { border-radius: 18px; width: 100%; }
.dual-shot { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.dual-shot img { height: 100%; object-fit: cover; }

.steps-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.step-card { padding: 28px; border-radius: 22px; background: #fff; border: 1px solid var(--line); }
.step-card > span { display: grid; place-items: center; width: 42px; height: 42px; border-radius: 50%; background: var(--ink); color: #fff; font-weight: 900; }
.step-card h3 { margin: 22px 0 8px; font-size: 18px; }
.step-card p { margin: 0; color: var(--muted); font-size: 14px; }

.gallery-section::after { content: ""; position: absolute; width: 500px; height: 500px; background: rgba(230,57,47,.11); border-radius: 50%; right: -190px; top: -160px; filter: blur(4px); }
.gallery-track { display: grid; grid-auto-flow: column; grid-auto-columns: minmax(470px, 1fr); overflow-x: auto; gap: 22px; padding: 6px 4px 20px; scroll-snap-type: x mandatory; scrollbar-color: #667085 transparent; }
.gallery-track figure { margin: 0; background: #1d2939; border: 1px solid #344054; border-radius: 24px; padding: 14px; scroll-snap-align: start; }
.gallery-track img { border-radius: 16px; }
.gallery-track figcaption { color: #d0d5dd; font-weight: 700; padding: 13px 5px 3px; }

.pricing-wrap { max-width: 1080px; }
.pricing-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; align-items: stretch; }
.price-card { position: relative; border: 1px solid var(--line); border-radius: 28px; background: #fff; padding: 34px; box-shadow: 0 16px 38px rgba(17,24,39,.06); display: flex; flex-direction: column; }
.price-card-featured { border: 2px solid var(--red); transform: translateY(-8px); box-shadow: 0 26px 54px rgba(230,57,47,.16); }
.best-value { position: absolute; right: 22px; top: 20px; background: var(--red); color: #fff; border-radius: 999px; padding: 5px 9px; font-size: 10px; letter-spacing: .08em; font-weight: 900; }
.price-term { font-size: 17px; font-weight: 900; color: var(--muted); }
.price { display: flex; align-items: flex-start; gap: 5px; color: var(--red); font-size: 68px; line-height: 1; font-weight: 950; letter-spacing: -.05em; margin: 25px 0 20px; }
.price span { font-size: 22px; margin-top: 8px; letter-spacing: 0; }
.price-card p { color: var(--muted); margin: 0 0 28px; flex-grow: 1; }
.button { display: inline-flex; justify-content: center; align-items: center; min-height: 48px; border-radius: 13px; padding: 12px 18px; font-weight: 900; transition: .2s; }
.button:hover { transform: translateY(-2px); }
.button-primary { background: var(--red); color: #fff; }
.button-outline { border: 1px solid var(--line); background: #fff; }
.pricing-note { color: var(--muted); text-align: center; font-size: 12px; max-width: 850px; margin: 28px auto 0; }

.faq-wrap { max-width: 950px; }
.faq-list { display: grid; gap: 14px; }
details { background: #fff; border: 1px solid var(--line); border-radius: 18px; padding: 0 22px; }
summary { cursor: pointer; list-style: none; padding: 22px 42px 22px 0; font-weight: 900; position: relative; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; position: absolute; right: 0; top: 18px; width: 30px; height: 30px; display: grid; place-items: center; border-radius: 50%; background: var(--red-soft); color: var(--red); font-size: 20px; }
details[open] summary::after { content: "−"; }
details p { color: var(--muted); margin: 0; padding: 0 0 22px; }

.contact-section { background: linear-gradient(135deg, #e6392f 0%, #a91613 100%); color: #fff; }
.contact-card { display: grid; grid-template-columns: 1fr auto; gap: 50px; align-items: center; }
.contact-card .eyebrow { background: rgba(255,255,255,.14); color: #fff; border-color: rgba(255,255,255,.22); }
.contact-card h2 { font-size: clamp(36px, 5vw, 56px); line-height: 1.08; letter-spacing: -.04em; margin: 18px 0 16px; max-width: 820px; }
.contact-card p { color: rgba(255,255,255,.78); max-width: 720px; font-size: 17px; }
.contact-actions { display: grid; gap: 12px; min-width: 310px; }
.button-light { background: #fff; color: var(--red-dark); }
.button-whatsapp { background: #1fc66d; color: #fff; }

.site-footer { background: #0c111d; color: #d0d5dd; padding: 42px 0; }
.footer-grid { display: grid; grid-template-columns: 1.1fr 1fr; gap: 26px; align-items: center; }
.footer-brand { display: flex; align-items: center; gap: 13px; }
.footer-brand img { width: 46px; height: 46px; border-radius: 50%; }
.footer-brand div { display: grid; }
.footer-brand span { color: #98a2b3; font-size: 12px; }
.footer-links { display: flex; justify-content: flex-end; gap: 20px; font-size: 13px; font-weight: 700; }
.footer-grid > p { grid-column: 1 / -1; border-top: 1px solid #263041; padding-top: 22px; margin: 0; color: #667085; font-size: 12px; }

.reveal { opacity: 0; transform: translateY(20px); transition: opacity .7s ease, transform .7s ease; }
.reveal.is-visible { opacity: 1; transform: none; }
.delay-1 { transition-delay: .08s; }
.delay-2 { transition-delay: .16s; }
.delay-3 { transition-delay: .24s; }

@media (max-width: 1050px) {
  .site-nav { gap: 15px; }
  .hero-grid { grid-template-columns: 1fr; }
  .hero { padding-top: 72px; }
  .hero-copy { max-width: 850px; }
  .hero-visual { max-width: 820px; margin-inline: auto; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .mode-row, .mode-row-reverse { grid-template-columns: 1fr; gap: 38px; }
  .mode-row-reverse .mode-copy { order: initial; }
  .steps-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-card { grid-template-columns: 1fr; }
  .contact-actions { min-width: 0; grid-template-columns: repeat(2, minmax(0,1fr)); }
}

@media (max-width: 820px) {
  .menu-toggle { display: inline-grid; place-items: center; order: 2; }
  .language-toggle { order: 3; }
  .site-nav { display: none; position: absolute; top: 78px; left: 20px; right: 20px; background: #fff; border: 1px solid var(--line); border-radius: 18px; padding: 16px; box-shadow: var(--shadow); flex-direction: column; align-items: stretch; gap: 2px; }
  .site-nav.is-open { display: flex; }
  .site-nav a { padding: 12px; border-radius: 10px; }
  .site-nav a:hover { background: var(--red-soft); }
  .site-nav a::after { display: none; }
  .proof-grid { grid-template-columns: repeat(2, 1fr); }
  .proof-grid > div:nth-child(2) { border-right: 0; }
  .proof-grid > div:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .pricing-grid { grid-template-columns: 1fr; }
  .price-card-featured { transform: none; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-links { justify-content: flex-start; flex-wrap: wrap; }
}

@media (max-width: 600px) {
  .container { width: min(var(--container), calc(100% - 28px)); }
  .section-pad { padding: 76px 0; }
  .brand strong { font-size: 14px; }
  .brand small { display: none; }
  .brand img { width: 44px; height: 44px; }
  .nav-wrap { gap: 8px; }
  .hero h1 { font-size: 48px; }
  .hero-lead { font-size: 17px; }
  .store-actions { display: grid; grid-template-columns: 1fr; }
  .store-button { width: 100%; }
  .floating-card { display: none; }
  .proof-grid { grid-template-columns: 1fr; }
  .proof-grid > div { border-right: 0; border-bottom: 1px solid var(--line); }
  .proof-grid > div:last-child { border-bottom: 0; }
  .feature-grid, .steps-grid { grid-template-columns: 1fr; }
  .dual-shot { grid-template-columns: 1fr; }
  .gallery-track { grid-auto-columns: 88%; }
  .contact-actions { grid-template-columns: 1fr; }
  .footer-links { display: grid; gap: 10px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  * { transition-duration: .01ms !important; }
}


/* V3 refinements */
html[lang="zh-CN"] body { font-family: KaiTi, "STKaiti", "Kaiti SC", "DFKai-SB", "PingFang SC", "Microsoft YaHei", serif; }
html[lang="zh-CN"] .brand strong, html[lang="zh-CN"] .price, html[lang="zh-CN"] .store-badge strong { font-family: Inter, ui-sans-serif, system-ui, "Segoe UI", Arial, sans-serif; }
.store-actions { display:flex; flex-wrap:wrap; gap:12px; margin-top:28px; }
.store-badge { min-width:205px; min-height:66px; display:flex; align-items:center; gap:13px; padding:9px 18px; border-radius:15px; background:#101828; color:#fff; border:1px solid #101828; box-shadow:0 10px 24px rgba(16,24,40,.13); transition:.2s; }
.store-badge:hover { transform:translateY(-2px); box-shadow:0 14px 30px rgba(16,24,40,.2); }
.store-badge svg { flex:0 0 auto; width:34px; height:40px; }
.store-badge span { display:grid; line-height:1.05; }
.store-badge small { font-size:9px; letter-spacing:.08em; margin-bottom:4px; }
.store-badge strong { font-size:20px; letter-spacing:-.02em; }
.google-play-icon { width:34px !important; }
.apple-icon { width:31px !important; }
.store-badge-muted { background:#fff; color:var(--ink); border-color:var(--line); box-shadow:none; opacity:.68; }
.store-badge-muted:hover { transform:none; box-shadow:none; }
.web-icon { display:grid !important; place-items:center; width:34px; height:34px; border:1px solid var(--line); border-radius:50%; font-size:20px; }
.content-library { background:#fffaf7; }
.content-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:22px; }
.content-card { overflow:hidden; border:1px solid var(--line); border-radius:26px; background:#fff; box-shadow:0 14px 34px rgba(17,24,39,.06); }
.content-card img { width:100%; aspect-ratio:16/10; object-fit:cover; object-position:top; }
.content-card > div { padding:25px; }
.content-card span { color:var(--red); font-size:12px; font-weight:900; letter-spacing:.12em; }
.content-card h3 { font-size:21px; line-height:1.25; margin:8px 0 10px; }
.content-card p { color:var(--muted); font-size:14px; margin:0; }
.error-book-section { background:linear-gradient(180deg,#fff 0%,#f8fcff 100%); }
.error-book-grid { display:grid; grid-template-columns:.8fr 1.2fr; gap:70px; align-items:center; }
.error-book-copy h2 { font-size:clamp(36px,5vw,58px); line-height:1.08; letter-spacing:-.04em; margin:17px 0 16px; }
.error-book-copy > p { color:var(--muted); font-size:17px; }
.price-card .button { position:relative; z-index:4; pointer-events:auto; cursor:pointer; }
.price-card { isolation:isolate; }
@media (max-width:1050px){ .content-grid{grid-template-columns:1fr 1fr;} .error-book-grid{grid-template-columns:1fr;gap:38px;} }
@media (max-width:600px){ .store-badge{width:100%;} .content-grid{grid-template-columns:1fr;} }

/* V4 refinements */
/* Keep small Chinese text crisp; use Kaiti only for prominent headings. */
html[lang="zh-CN"] body {
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
}
html[lang="zh-CN"] h1,
html[lang="zh-CN"] .section-heading h2,
html[lang="zh-CN"] .mode-copy h3,
html[lang="zh-CN"] .error-book-copy h2,
html[lang="zh-CN"] .contact-card h2,
html[lang="zh-CN"] .content-card h3 {
  font-family: KaiTi, "STKaiti", "Kaiti SC", "DFKai-SB", "PingFang SC", "Microsoft YaHei", serif;
  color: var(--ink);
}
html[lang="zh-CN"] .hero-lead,
html[lang="zh-CN"] .section-heading p,
html[lang="zh-CN"] .mode-copy p,
html[lang="zh-CN"] .check-list,
html[lang="zh-CN"] .feature-card p,
html[lang="zh-CN"] .content-card p,
html[lang="zh-CN"] .price-card,
html[lang="zh-CN"] .pricing-note,
html[lang="zh-CN"] .promo-notice,
html[lang="zh-CN"] .site-nav,
html[lang="zh-CN"] .button,
html[lang="zh-CN"] .eyebrow {
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
}

/* Three platform entrances stay in one row on desktop. */
.store-actions {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  width: min(100%, 650px);
  margin-top: 28px;
}
.store-badge {
  min-width: 0;
  min-height: 64px;
  padding: 9px 13px;
  gap: 10px;
}
.store-badge svg { width: 31px; height: 37px; }
.store-badge strong { font-size: 17px; white-space: nowrap; }
.store-badge small { font-size: 8px; }
.web-icon { width: 31px; height: 31px; }

/* Four core features appear as four aligned tags. */
.floating-card-modes {
  width: 450px;
  max-width: none;
  right: -16px;
  top: -2px;
}
.core-mode-pills {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 6px;
  margin-top: 9px;
}
.core-mode-pills span {
  display: block;
  margin: 0;
  padding: 6px 7px;
  border-radius: 999px;
  background: var(--red-soft);
  color: var(--red-dark);
  text-align: center;
  white-space: nowrap;
  font-size: 10px;
  font-weight: 800;
}

.section-heading-wide { max-width: 100%; }
.no-wrap-desktop { white-space: nowrap; }

/* Correct screenshot layouts. */
.triple-shot {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}
.triple-shot img,
.practice-shots img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top;
}

/* More substantial pricing section. */
.pricing-section {
  background:
    radial-gradient(circle at 12% 15%, rgba(230,57,47,.07), transparent 26%),
    linear-gradient(180deg, #ffffff 0%, #fffaf8 100%);
}
.pricing-wrap { max-width: 1120px; }
.price-comparison {
  position: relative;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 22px;
  margin: -8px 0 42px;
  padding: 22px 28px;
  border: 1px solid #ffd2cc;
  border-radius: 24px;
  background: #fff;
  box-shadow: 0 18px 42px rgba(230,57,47,.09);
}
.comparison-block { display: grid; gap: 5px; }
.comparison-block span { color: var(--muted); font-size: 13px; font-weight: 800; }
.comparison-block strong {
  display: flex;
  align-items: flex-start;
  gap: 4px;
  font-size: 48px;
  line-height: 1;
  letter-spacing: -.045em;
}
.comparison-block strong small { font-size: 19px; margin-top: 7px; letter-spacing: 0; }
.comparison-regular strong { color: #667085; text-decoration: line-through; text-decoration-thickness: 2px; }
.comparison-promo strong { color: var(--red); }
.comparison-arrow {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--red-soft);
  color: var(--red);
  font-size: 26px;
  font-weight: 900;
}
.saving-chip {
  position: absolute;
  right: 22px;
  top: -14px;
  padding: 7px 12px;
  border-radius: 999px;
  background: var(--red);
  color: #fff;
  font-size: 12px;
  font-weight: 900;
  box-shadow: 0 8px 20px rgba(230,57,47,.2);
}
.pricing-grid { gap: 20px; }
.price-card {
  padding: 30px;
  min-height: 485px;
  overflow: visible;
}
.price-card-top { display: grid; gap: 9px; min-height: 58px; }
.plan-tag {
  justify-self: start;
  padding: 5px 9px;
  border-radius: 999px;
  background: #f2f4f7;
  color: #475467;
  font-size: 11px;
  font-weight: 800;
}
.price-card-featured .plan-tag { background: var(--red-soft); color: var(--red-dark); }
.price { margin: 22px 0 8px; }
.price-per-year { color: var(--red-dark); font-weight: 900; font-size: 14px; margin-bottom: 22px; }
.plan-list {
  list-style: none;
  padding: 0;
  margin: 0 0 28px;
  display: grid;
  gap: 11px;
  flex-grow: 1;
}
.plan-list li {
  position: relative;
  padding-left: 24px;
  color: #475467;
  font-size: 13px;
}
.plan-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 1px;
  display: grid;
  place-items: center;
  width: 17px;
  height: 17px;
  border-radius: 50%;
  background: var(--red-soft);
  color: var(--red);
  font-size: 10px;
  font-weight: 900;
}
.price-card .button {
  width: 100%;
  position: relative;
  z-index: 8;
  pointer-events: auto;
}
.promo-notice {
  display: grid;
  gap: 7px;
  max-width: 950px;
  margin: 34px auto 0;
  padding: 18px 22px;
  border: 1px solid #ffc8c1;
  border-radius: 18px;
  background: var(--red-soft);
  text-align: center;
}
.promo-notice strong { color: var(--red-dark); font-size: 18px; }
.promo-notice span { color: #475467; font-size: 14px; }
.pricing-policy { color: var(--muted); text-align: center; font-size: 12px; max-width: 850px; margin: 14px auto 0; }

@media (max-width: 1180px) {
  .floating-card-modes { width: 410px; right: -4px; }
  .core-mode-pills span { font-size: 9px; }
  .no-wrap-desktop { font-size: clamp(34px, 4.4vw, 52px) !important; }
}

@media (max-width: 1050px) {
  .floating-card-modes { width: 470px; }
  .no-wrap-desktop { white-space: normal; }
  .triple-shot { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (max-width: 820px) {
  .price-comparison { grid-template-columns: 1fr; text-align: center; }
  .comparison-block { justify-items: center; }
  .comparison-arrow { transform: rotate(90deg); margin: -5px auto; }
  .saving-chip { position: static; justify-self: center; }
}

@media (max-width: 700px) {
  .store-actions { grid-template-columns: 1fr; width: 100%; }
  .store-badge { width: 100%; }
  .triple-shot { grid-template-columns: 1fr; }
  .floating-card-modes { display: none; }
  .price-comparison { padding: 22px 18px; }
  .comparison-block strong { font-size: 42px; }
}


/* V5 visual refinements */
body {
  background:
    radial-gradient(circle at 8% 4%, rgba(230,57,47,.055), transparent 22%),
    radial-gradient(circle at 92% 16%, rgba(73,184,255,.07), transparent 24%),
    #fbfcff;
}
main { overflow: hidden; }
.hero {
  background:
    radial-gradient(circle at 8% 18%, rgba(230,57,47,.11), transparent 28%),
    radial-gradient(circle at 90% 16%, rgba(73,184,255,.14), transparent 31%),
    linear-gradient(135deg, #fffaf8 0%, #ffffff 46%, #f3faff 100%);
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: .28;
  background-image: radial-gradient(rgba(25,33,45,.14) .7px, transparent .7px);
  background-size: 22px 22px;
  mask-image: linear-gradient(90deg, transparent 0%, #000 24%, #000 76%, transparent 100%);
}

/* Turn the sparse metric strip into four compact visual cards. */
.proof-strip {
  position: relative;
  z-index: 4;
  border: 0;
  padding: 30px 0 34px;
  background:
    radial-gradient(circle at 12% 10%, rgba(230,57,47,.08), transparent 26%),
    radial-gradient(circle at 88% 90%, rgba(73,184,255,.10), transparent 30%),
    linear-gradient(180deg, #f8fbff 0%, #fff8f5 100%);
}
.proof-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}
.proof-grid > div {
  min-height: 112px;
  padding: 22px 20px;
  grid-template-columns: 52px 1fr;
  gap: 15px;
  border: 1px solid rgba(255,255,255,.9);
  border-radius: 22px;
  background: rgba(255,255,255,.88);
  box-shadow: 0 15px 38px rgba(25,33,45,.085);
  backdrop-filter: blur(12px);
  transition: transform .22s ease, box-shadow .22s ease;
}
.proof-grid > div:nth-child(1) { background: linear-gradient(145deg,#fff 0%,#fff0ed 100%); }
.proof-grid > div:nth-child(2) { background: linear-gradient(145deg,#fff 0%,#edf8ff 100%); }
.proof-grid > div:nth-child(3) { background: linear-gradient(145deg,#fff 0%,#f5f1ff 100%); }
.proof-grid > div:nth-child(4) { background: linear-gradient(145deg,#fff 0%,#eefbf4 100%); }
.proof-grid > div:hover { transform: translateY(-4px); box-shadow: 0 20px 46px rgba(25,33,45,.13); }
.proof-grid strong {
  display: grid;
  place-items: center;
  width: 52px;
  height: 52px;
  border-radius: 17px;
  background: #fff;
  box-shadow: 0 8px 22px rgba(25,33,45,.08);
  font-size: 25px;
}
.proof-grid span { color: #344054; font-size: 14px; font-weight: 800; line-height: 1.45; }

/* Give the main content sections a softer, less rigid rhythm. */
#features {
  padding-top: 86px;
  background:
    radial-gradient(circle at 5% 30%, rgba(230,57,47,.055), transparent 24%),
    linear-gradient(180deg, rgba(255,255,255,.96) 0%, #fff 100%);
}
.content-library {
  background:
    radial-gradient(circle at 92% 18%, rgba(230,57,47,.06), transparent 24%),
    linear-gradient(135deg, #fff9f6 0%, #fffefd 50%, #f6fbff 100%);
}
.section-soft {
  background:
    radial-gradient(circle at 92% 12%, rgba(73,184,255,.08), transparent 27%),
    radial-gradient(circle at 8% 88%, rgba(230,57,47,.045), transparent 24%),
    linear-gradient(180deg, #f6fbff 0%, #ffffff 100%);
}

/* The selected plan follows the card the visitor clicks. */
.price-card {
  cursor: pointer;
  transition: transform .24s ease, box-shadow .24s ease, border-color .24s ease, background .24s ease;
  outline: none;
}
.price-card:hover { transform: translateY(-4px); box-shadow: 0 22px 48px rgba(17,24,39,.10); }
.price-card:focus-visible { box-shadow: 0 0 0 4px rgba(230,57,47,.16), 0 22px 48px rgba(17,24,39,.10); }
.price-card-featured {
  border: 2px solid var(--red);
  transform: translateY(-8px);
  background: linear-gradient(180deg,#fff 0%,#fff8f6 100%);
  box-shadow: 0 26px 54px rgba(230,57,47,.16);
}
.price-card-featured:hover { transform: translateY(-10px); }
.price-card-featured .plan-tag { background: var(--red-soft); color: var(--red-dark); }
.price-card-featured .button-outline { background: var(--red); border-color: var(--red); color: #fff; }
.price-card:not(.price-card-featured) .button-primary { background: #fff; color: var(--ink); border: 1px solid var(--line); }
.price-card::after {
  content: "";
  position: absolute;
  inset: 10px;
  border-radius: 20px;
  border: 1px solid transparent;
  pointer-events: none;
}
.price-card-featured::after { border-color: rgba(230,57,47,.16); }

@media (max-width: 1050px) {
  .proof-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .proof-grid > div { border: 1px solid rgba(255,255,255,.9) !important; }
}
@media (max-width: 820px) {
  .price-card-featured, .price-card-featured:hover { transform: none; }
}
@media (max-width: 600px) {
  .proof-strip { padding: 22px 0 28px; }
  .proof-grid { grid-template-columns: 1fr; gap: 12px; }
  .proof-grid > div { min-height: 92px; grid-template-columns: 46px 1fr; padding: 17px; }
  .proof-grid strong { width: 46px; height: 46px; border-radius: 14px; font-size: 22px; }
  #features { padding-top: 68px; }
}


/* V6 refinements: cohesive backgrounds, readable headings and light showcase */
body {
  background:
    radial-gradient(circle at 10% 3%, rgba(230,57,47,.045), transparent 24%),
    radial-gradient(circle at 92% 14%, rgba(79,153,255,.055), transparent 25%),
    #f8fafc;
}

/* Keep selected desktop headings on one visual line; allow natural wrapping on smaller screens. */
.headline-single-line {
  max-width: none !important;
  width: 100%;
  white-space: nowrap;
  font-size: clamp(34px, 3vw, 46px) !important;
  letter-spacing: -.03em !important;
}
html[lang="zh-CN"] .headline-single-line {
  font-size: clamp(34px, 2.85vw, 45px) !important;
  letter-spacing: 0 !important;
}

/* Alternate gentle backgrounds so the long page feels less flat. */
#features {
  background:
    radial-gradient(circle at 4% 16%, rgba(230,57,47,.07), transparent 26%),
    radial-gradient(circle at 95% 86%, rgba(94,169,255,.07), transparent 27%),
    linear-gradient(135deg,#fffaf8 0%,#ffffff 54%,#f5faff 100%);
}
#features .feature-card,
.steps-grid .step-card,
.faq-list details {
  background: rgba(255,255,255,.92);
  box-shadow: 0 16px 38px rgba(30,41,59,.065);
  backdrop-filter: blur(10px);
}
#features + .content-library { border-top: 1px solid rgba(231,234,240,.72); }

/* Replace the sudden black showcase with a calm app-blue section. */
.gallery-light {
  color: var(--ink);
  overflow: hidden;
  background:
    radial-gradient(circle at 90% 10%, rgba(230,57,47,.10), transparent 25%),
    radial-gradient(circle at 7% 90%, rgba(71,153,255,.13), transparent 26%),
    linear-gradient(135deg,#edf7ff 0%,#f8fbff 48%,#fff7f4 100%);
  border-block: 1px solid rgba(197,216,236,.72);
}
.gallery-light::before {
  content: "";
  position: absolute;
  width: 420px;
  height: 420px;
  left: -190px;
  top: -170px;
  border-radius: 50%;
  background: rgba(76,155,255,.10);
  filter: blur(4px);
}
.gallery-light .section-heading h2 { color: var(--ink); }
.gallery-light .section-heading p { color: #56657a; }
.gallery-light .gallery-track { scrollbar-color: #8aa3bf transparent; }
.gallery-light .gallery-track figure {
  background: rgba(255,255,255,.90);
  border: 1px solid rgba(178,204,229,.85);
  box-shadow: 0 18px 44px rgba(36,69,104,.10);
}
.gallery-light .gallery-track figcaption { color: #344054; }
.gallery-light .gallery-track img { background: #eaf6ff; }

/* CTA heading: white gives the strongest contrast on the red background. */
.contact-section {
  background:
    radial-gradient(circle at 92% 14%, rgba(255,255,255,.11), transparent 25%),
    linear-gradient(135deg,#e44b3c 0%,#bd2d23 56%,#982018 100%);
}
.contact-card h2,
html[lang="zh-CN"] .contact-card h2 {
  color: #fffaf5 !important;
  text-shadow: 0 2px 16px rgba(99,18,12,.24);
}
.contact-card p { color: rgba(255,255,255,.90); }

/* Stronger footer subtitle readability. */
.footer-brand span { color: #c0c9d5; font-weight: 700; }

@media (max-width: 1180px) {
  .headline-single-line,
  html[lang="zh-CN"] .headline-single-line {
    white-space: normal;
    font-size: clamp(34px, 4vw, 46px) !important;
  }
}
@media (max-width: 700px) {
  .headline-single-line,
  html[lang="zh-CN"] .headline-single-line {
    white-space: normal;
    font-size: clamp(31px, 10vw, 42px) !important;
  }
  .gallery-light .gallery-track { grid-auto-columns: minmax(86vw, 1fr); }
}

/* V7: prevent long English headings from being clipped. */
html[lang="en"] .no-wrap-desktop,
html[lang="en"] .headline-single-line {
  white-space: normal !important;
  overflow-wrap: normal;
  word-break: normal;
  max-width: 100% !important;
}
html[lang="en"] .section-heading-wide h2.no-wrap-desktop {
  font-size: clamp(38px, 4.15vw, 56px);
  line-height: 1.08;
  letter-spacing: -.038em;
  text-wrap: balance;
}
html[lang="en"] .contact-heading.headline-single-line {
  font-size: clamp(36px, 3.55vw, 52px) !important;
  line-height: 1.12;
  letter-spacing: -.035em !important;
  text-wrap: balance;
}

/* Keep Chinese desktop headings on one line where space permits. */
@media (min-width: 1181px) {
  html[lang="zh-CN"] .no-wrap-desktop,
  html[lang="zh-CN"] .headline-single-line {
    white-space: nowrap;
  }
}

/* A little extra breathing room for the final call-to-action text. */
.contact-card > div:first-child { min-width: 0; }
.contact-card h2 { max-width: 900px; }

@media (max-width: 900px) {
  html[lang="en"] .section-heading-wide h2.no-wrap-desktop,
  html[lang="en"] .contact-heading.headline-single-line {
    font-size: clamp(32px, 8vw, 44px) !important;
    text-wrap: wrap;
  }
}