:root {
  --ink: #073538;
  --ink-deep: #03282b;
  --ink-soft: #0f4b4a;
  --gold: #f4b93f;
  --gold-pale: #ffe6a3;
  --cream: #fff8e8;
  --paper: #fffcf4;
  --text: #0b3032;
  --muted: #607372;
  --line: rgba(7, 53, 56, .13);
  --shadow: 0 30px 80px rgba(4, 42, 44, .14);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  overflow-x: hidden;
  color: var(--text);
  background: var(--paper);
  font-family: "Microsoft YaHei", "PingFang SC", system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  height: 76px;
  padding: 0 max(5vw, 24px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(255, 252, 244, .92);
  border-bottom: 1px solid rgba(7, 53, 56, .08);
  backdrop-filter: blur(16px);
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand img {
  width: 44px;
  height: 44px;
  object-fit: cover;
  object-position: 50% 47%;
  border-radius: 50%;
  border: 2px solid var(--gold);
}
.brand span { display: grid; line-height: 1.05; }
.brand b { font-size: 21px; letter-spacing: .04em; }
.brand small { margin-top: 6px; color: #9a7027; font-size: 10px; letter-spacing: .15em; }
nav { display: flex; gap: 38px; font-size: 14px; font-weight: 700; }
nav a { position: relative; padding: 28px 0 24px; }
nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: 18px;
  height: 2px;
  background: var(--gold);
  transition: right .25s ease;
}
nav a:hover::after { right: 0; }
.header-download {
  padding: 11px 21px;
  color: #fff8e8;
  background: var(--ink);
  border: 1px solid var(--ink);
  border-radius: 999px;
  font-size: 14px;
  font-weight: 800;
  transition: transform .2s ease, background .2s ease;
}
.header-download:hover { transform: translateY(-2px); background: var(--ink-soft); }

.hero {
  position: relative;
  min-height: 710px;
  padding: 78px max(5vw, 24px) 92px;
  display: grid;
  grid-template-columns: minmax(0, .9fr) minmax(480px, 1.1fr);
  align-items: center;
  gap: 6vw;
  overflow: hidden;
  background:
    linear-gradient(rgba(244,185,63,.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(244,185,63,.055) 1px, transparent 1px),
    radial-gradient(circle at 83% 20%, #fff0bf 0, transparent 31%),
    var(--cream);
  background-size: 42px 42px, 42px 42px, auto, auto;
}
.hero::before {
  content: "";
  position: absolute;
  right: -110px;
  top: -130px;
  width: 520px;
  height: 520px;
  border: 1px solid rgba(244,185,63,.35);
  border-radius: 50%;
}
.hero-glow { position: absolute; border-radius: 50%; filter: blur(2px); pointer-events: none; }
.glow-one { width: 16px; height: 16px; left: 47%; top: 18%; background: var(--gold); box-shadow: 0 0 30px var(--gold); }
.glow-two { width: 8px; height: 8px; left: 6%; bottom: 22%; background: var(--gold); box-shadow: 0 0 24px var(--gold); }
.hero-copy { position: relative; z-index: 2; max-width: 640px; }
.hero-copy, .hero-visual { min-width: 0; }
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 13px;
  border: 1px solid rgba(7,53,56,.18);
  border-radius: 999px;
  color: var(--ink-soft);
  background: rgba(255,255,255,.6);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: .08em;
}
.eyebrow i { width: 8px; height: 8px; background: var(--gold); border-radius: 50%; }
.hero h1 {
  margin: 28px 0 23px;
  font-size: clamp(54px, 6vw, 88px);
  line-height: 1.04;
  letter-spacing: -.055em;
}
.hero h1 em { color: var(--ink); font-style: normal; position: relative; }
.hero h1 em::after {
  content: "";
  position: absolute;
  left: 2%; right: 0; bottom: 1px;
  height: 13px;
  z-index: -1;
  background: var(--gold);
  border-radius: 999px;
  opacity: .68;
}
.hero-copy > p { width: 100%; max-width: 580px; overflow-wrap: anywhere; color: #526563; font-size: 18px; line-height: 1.9; }
.hero-actions { margin-top: 34px; display: flex; align-items: center; gap: 24px; flex-wrap: wrap; }
.primary-button, .secondary-button, .light-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  border-radius: 14px;
  font-weight: 900;
  transition: transform .2s ease, box-shadow .2s ease;
}
.primary-button {
  min-height: 56px;
  padding: 0 25px;
  color: #fff9eb;
  background: var(--ink);
  box-shadow: 0 12px 30px rgba(3,40,43,.23);
}
.primary-button:hover, .secondary-button:hover, .light-button:hover { transform: translateY(-3px); }
.windows-mark { color: var(--gold); font-size: 26px; line-height: 1; }
.text-link { font-size: 15px; font-weight: 800; }
.text-link span { display: inline-block; color: #b47c12; transition: transform .2s; }
.text-link:hover span { transform: translateY(4px); }
.trust-row { margin-top: 28px; display: flex; gap: 22px; flex-wrap: wrap; color: #667876; font-size: 12px; }
.trust-row span::first-letter { color: #c68d1d; }

.hero-visual { position: relative; z-index: 2; width: min(100%, 770px); justify-self: end; }
.visual-frame {
  position: relative;
  padding: 10px;
  overflow: hidden;
  border: 1px solid rgba(244,185,63,.75);
  border-radius: 30px;
  background: linear-gradient(145deg, #fff7de, #f1b440);
  box-shadow: var(--shadow);
  transform: rotate(1deg);
}
.visual-frame::after {
  content: "";
  position: absolute;
  inset: 10px;
  border: 1px solid rgba(255,255,255,.42);
  border-radius: 21px;
  pointer-events: none;
}
.visual-frame img { width: 100%; aspect-ratio: 1.74 / 1; object-fit: cover; border-radius: 21px; }
.floating-card {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 13px 17px;
  border: 1px solid rgba(7,53,56,.13);
  border-radius: 16px;
  background: rgba(255,252,244,.94);
  box-shadow: 0 16px 35px rgba(3,40,43,.18);
  backdrop-filter: blur(12px);
}
.floating-card > span {
  width: 38px; height: 38px;
  display: grid; place-items: center;
  border-radius: 12px;
  color: var(--ink);
  background: var(--gold-pale);
  font-weight: 950;
}
.floating-card div { display: grid; gap: 4px; }
.floating-card b { font-size: 13px; }
.floating-card small { color: var(--muted); font-size: 11px; }
.card-top { right: -20px; top: -34px; }
.card-bottom { left: -45px; bottom: -30px; }

.brand-strip {
  padding: 26px max(5vw, 24px);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  color: #fff6de;
  background: var(--ink-deep);
  border-top: 3px solid var(--gold);
}
.brand-strip div { padding: 9px 5vw; display: grid; gap: 5px; border-right: 1px solid rgba(255,230,163,.2); }
.brand-strip div:first-child { padding-left: 0; }
.brand-strip div:last-child { border-right: 0; }
.brand-strip b { color: var(--gold-pale); font-size: 17px; }
.brand-strip span { color: rgba(255,255,255,.62); font-size: 12px; }

.companion-section {
  padding: 110px max(5vw, 24px);
  display: grid;
  grid-template-columns: minmax(360px, .92fr) minmax(360px, 1.08fr);
  align-items: center;
  gap: 8vw;
  background: #fffdf8;
}
.companion-visual {
  position: relative;
  aspect-ratio: 1 / .92;
  overflow: hidden;
  border: 1px solid rgba(221,153,38,.28);
  border-radius: 32px;
  background: #fff8e9;
  box-shadow: var(--shadow);
}
.companion-visual img { width: 100%; height: 100%; object-fit: cover; object-position: 50% 4%; }
.companion-copy > span { color: #c98217; font-size: 12px; font-weight: 900; letter-spacing: .15em; }
.companion-copy h2 { margin: 17px 0 20px; font-size: clamp(40px, 4.7vw, 68px); line-height: 1.12; letter-spacing: -.045em; }
.companion-copy > p { max-width: 620px; color: var(--muted); font-size: 17px; line-height: 1.9; }
.companion-values { margin-top: 33px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.companion-values div { padding: 20px 16px; display: grid; gap: 7px; border: 1px solid rgba(221,153,38,.25); border-radius: 17px; background: #fff8e9; }
.companion-values b { color: #a9680c; font-size: 17px; }
.companion-values small { color: #7c7f76; font-size: 11px; line-height: 1.55; }

.product-section, .features-section { padding: 120px max(5vw, 24px); }
.section-heading > span, .steps-copy > span, .download-section > div > span {
  color: #b57b10;
  font-size: 12px;
  font-weight: 900;
  letter-spacing: .16em;
  text-transform: uppercase;
}
.section-heading h2, .steps-copy h2, .download-section h2 {
  margin: 18px 0 14px;
  font-size: clamp(38px, 4.4vw, 64px);
  line-height: 1.15;
  letter-spacing: -.045em;
}
.section-heading p, .steps-copy p { color: var(--muted); font-size: 16px; }
.product-card {
  margin-top: 52px;
  min-height: 520px;
  padding: 56px;
  display: grid;
  grid-template-columns: 160px minmax(280px, .8fr) minmax(390px, 1.2fr);
  align-items: center;
  gap: 45px;
  border: 1px solid rgba(7,53,56,.12);
  border-radius: 30px;
  background: #fff;
  box-shadow: var(--shadow);
  overflow: hidden;
}
.product-icon img { width: 154px; height: 154px; object-fit: cover; border: 5px solid var(--gold); border-radius: 35px; box-shadow: 0 18px 40px rgba(3,40,43,.18); }
.version { color: #af7510; font-size: 11px; font-weight: 900; letter-spacing: .12em; }
.product-info h3 { margin: 12px 0 14px; font-size: 32px; line-height: 1.2; }
.product-info > p { color: var(--muted); line-height: 1.8; }
.product-info ul { margin: 22px 0 28px; padding: 0; display: grid; gap: 10px; list-style: none; font-size: 14px; }
.product-info li::before { content: "✓"; margin-right: 10px; color: #b5790d; font-weight: 900; }
.secondary-button { padding: 13px 18px; color: var(--ink-deep); background: var(--gold); }
.app-preview { border: 1px solid rgba(7,53,56,.13); border-radius: 18px; background: #f7f8f5; box-shadow: 0 24px 70px rgba(3,40,43,.18); transform: rotate(-1.5deg); }
.preview-bar { height: 46px; padding: 0 15px; display: flex; align-items: center; gap: 7px; color: #fff; background: var(--ink-deep); border-radius: 17px 17px 0 0; }
.preview-bar i { width: 8px; height: 8px; border-radius: 50%; background: rgba(255,255,255,.35); }
.preview-bar b { margin-left: 7px; font-size: 10px; letter-spacing: .04em; }
.preview-body { padding: 31px; }
.preview-badge { padding: 5px 8px; color: #9d6a0c; background: #fff0c4; border-radius: 7px; font-size: 10px; font-weight: 800; }
.preview-body h4 { margin: 14px 0 22px; font-size: 20px; }
.preview-option { margin-top: 10px; padding: 14px 16px; display: grid; grid-template-columns: 1fr auto; gap: 4px 20px; border: 1px solid #e0e5df; border-radius: 11px; background: #fff; }
.preview-option strong { font-size: 13px; }
.preview-option small { color: #77827f; font-size: 10px; }
.preview-option b { grid-row: 1 / 3; grid-column: 2; align-self: center; color: #b67c12; }
.preview-option.active { border-color: var(--gold); box-shadow: 0 0 0 2px rgba(244,185,63,.13); }
.preview-status { margin-top: 20px; color: #507067; font-size: 10px; }
.preview-status i { display: inline-block; width: 7px; height: 7px; margin-right: 6px; border-radius: 50%; background: #48a36b; }

.features-section { color: #fff6e2; background: var(--ink-deep); }
.centered { text-align: center; }
.centered > span { color: var(--gold); }
.feature-grid { margin-top: 58px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.feature-grid article { position: relative; min-height: 330px; padding: 34px; border: 1px solid rgba(255,230,163,.17); border-radius: 23px; background: rgba(255,255,255,.035); }
.feature-grid article.featured { color: var(--ink-deep); background: var(--gold); border-color: var(--gold); transform: translateY(-12px); }
.feature-number { color: rgba(255,255,255,.35); font-size: 12px; font-weight: 900; }
.featured .feature-number { color: rgba(3,40,43,.47); }
.feature-symbol { margin-top: 48px; width: 57px; height: 57px; display: grid; place-items: center; color: var(--gold); border: 1px solid currentColor; border-radius: 17px; font-size: 28px; }
.featured .feature-symbol { color: var(--ink-deep); }
.feature-grid h3 { margin: 25px 0 13px; font-size: 24px; }
.feature-grid p { margin: 0; color: rgba(255,255,255,.62); line-height: 1.8; font-size: 14px; }
.featured p { color: rgba(3,40,43,.72); }

.steps-section { padding: 120px max(5vw, 24px); display: grid; grid-template-columns: .78fr 1.22fr; gap: 9vw; align-items: center; background: var(--cream); }
.steps-list { margin: 0; padding: 0; display: grid; list-style: none; }
.steps-list li { padding: 29px 0; display: grid; grid-template-columns: 58px 1fr; gap: 22px; border-bottom: 1px solid var(--line); }
.steps-list li:first-child { border-top: 1px solid var(--line); }
.steps-list li > b { width: 48px; height: 48px; display: grid; place-items: center; color: var(--ink-deep); background: var(--gold); border-radius: 50%; font-size: 18px; }
.steps-list h3 { margin: 2px 0 8px; font-size: 20px; }
.steps-list p { margin: 0; color: var(--muted); line-height: 1.6; font-size: 14px; }

.download-section { margin: 0 max(3vw, 18px) 30px; padding: 60px max(4vw, 30px); display: grid; grid-template-columns: 180px 1fr auto; align-items: center; gap: 50px; color: #fff7e4; background: var(--ink-deep); border-radius: 32px; overflow: hidden; }
.download-mascot { align-self: stretch; position: relative; min-height: 210px; }
.download-mascot img { position: absolute; width: 260px; max-width: none; left: -50px; top: -62px; border-radius: 50%; }
.download-section h2 { margin-bottom: 0; font-size: clamp(34px, 4vw, 57px); }
.download-section > div > span { color: var(--gold); }
.download-section p { color: rgba(255,255,255,.62); }
.light-button { min-height: 58px; padding: 0 24px; color: var(--ink-deep); background: var(--gold-pale); white-space: nowrap; }

.site-footer { padding: 48px max(5vw, 24px) 28px; background: #fffcf4; }
.footer-brand { display: flex; align-items: center; gap: 15px; }
.footer-brand img { width: 55px; height: 55px; object-fit: cover; border-radius: 50%; border: 2px solid var(--gold); }
.footer-brand div { display: grid; gap: 4px; }
.footer-brand b { font-size: 20px; }
.footer-brand span { color: var(--muted); font-size: 12px; }
.footer-links { margin: 34px 0; display: flex; gap: 28px; font-size: 13px; font-weight: 800; }
.legal { padding-top: 22px; display: flex; gap: 12px 20px; flex-wrap: wrap; border-top: 1px solid var(--line); color: #768482; font-size: 11px; }
.legal a:hover { color: #a66f0c; }

@media (max-width: 1050px) {
  .hero { grid-template-columns: 1fr; padding-top: 58px; }
  .hero-copy { max-width: 760px; }
  .hero-visual { width: min(860px, 94%); justify-self: center; margin-top: 25px; }
  .product-card { grid-template-columns: 120px 1fr; }
  .product-icon img { width: 120px; height: 120px; }
  .app-preview { grid-column: 1 / -1; }
  .download-section { grid-template-columns: 130px 1fr; }
  .download-section .light-button { grid-column: 2; justify-self: start; }
  .companion-section { grid-template-columns: 1fr 1fr; gap: 5vw; }
  .companion-values { grid-template-columns: 1fr; }
}

@media (max-width: 740px) {
  .site-header { height: 66px; padding: 0 17px; }
  .brand img { width: 38px; height: 38px; }
  .brand b { font-size: 18px; }
  .brand small { font-size: 8px; }
  nav { display: none; }
  .header-download { display: none; }
  .hero { width: 100%; max-width: 100vw; min-height: auto; padding: 52px 20px 70px; grid-template-columns: minmax(0, 1fr); gap: 28px; }
  .hero > * { width: 100%; max-width: calc(100vw - 40px); }
  .hero-copy > p { width: auto; max-width: none; }
  .hero h1 { margin-top: 22px; font-size: clamp(44px, 14vw, 65px); }
  .hero-copy > p { font-size: 16px; line-height: 1.75; }
  .hero-actions { align-items: stretch; flex-direction: column; gap: 16px; }
  .primary-button { width: 100%; }
  .text-link { text-align: center; }
  .trust-row { display: grid; gap: 8px; }
  .hero-visual { width: 100%; max-width: calc(100vw - 40px); margin-top: 10px; }
  .visual-frame { padding: 6px; border-radius: 20px; }
  .visual-frame img { border-radius: 15px; }
  .floating-card { display: none; }
  .brand-strip { grid-template-columns: 1fr 1fr; padding: 20px; }
  .brand-strip div { padding: 16px; border-bottom: 1px solid rgba(255,230,163,.16); }
  .brand-strip div:nth-child(2) { border-right: 0; }
  .brand-strip div:nth-child(3), .brand-strip div:nth-child(4) { border-bottom: 0; }
  .companion-section { padding: 72px 20px; grid-template-columns: 1fr; gap: 35px; }
  .companion-visual { aspect-ratio: 1 / 1.03; border-radius: 23px; }
  .companion-copy h2 { font-size: 41px; }
  .companion-copy > p { font-size: 15px; }
  .companion-values { grid-template-columns: 1fr; }
  .product-section, .features-section { padding: 78px 20px; }
  .section-heading h2, .steps-copy h2 { font-size: 40px; }
  .product-card { margin-top: 38px; padding: 28px 22px; grid-template-columns: 1fr; gap: 26px; border-radius: 23px; }
  .product-icon img { width: 92px; height: 92px; border-radius: 23px; }
  .product-info h3 { font-size: 26px; }
  .app-preview { grid-column: auto; }
  .preview-body { padding: 22px 17px; }
  .feature-grid { grid-template-columns: 1fr; }
  .feature-grid article, .feature-grid article.featured { min-height: 280px; transform: none; }
  .feature-symbol { margin-top: 30px; }
  .steps-section { padding: 78px 20px; grid-template-columns: 1fr; gap: 35px; }
  .steps-list li { grid-template-columns: 46px 1fr; gap: 15px; }
  .steps-list li > b { width: 42px; height: 42px; }
  .download-section { margin: 0 12px 18px; padding: 42px 25px; grid-template-columns: 1fr; gap: 24px; border-radius: 24px; }
  .download-mascot { min-height: 120px; }
  .download-mascot img { width: 185px; left: -21px; top: -48px; }
  .download-section .light-button { grid-column: auto; width: 100%; }
  .site-footer { padding: 40px 20px 24px; }
}

@media (prefers-reduced-motion: no-preference) {
  .hero-copy { animation: rise .7s ease both; }
  .hero-visual { animation: rise .8s .08s ease both; }
  @keyframes rise { from { opacity: 0; transform: translateY(18px); } to { opacity: 1; transform: translateY(0); } }
}