:root {
  --ink: #183b37;
  --ink-2: #2f554d;
  --muted: #657a70;
  --sage: #8da596;
  --line: #dce5de;
  --soft: #f2f5f0;
  --paper: #fbfcf9;
  --white: #fff;
  --accent: #b6343f;
  --radius-lg: 24px;
  --radius-md: 18px;
  --shadow: 0 18px 50px rgba(25, 58, 53, .08);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 96px; }
body {
  margin: 0;
  overflow-x: hidden;
  color: var(--ink);
  background: var(--paper);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; height: auto; }
a:focus-visible { outline: 3px solid var(--accent); outline-offset: 4px; }
.skip {
  position: fixed;
  top: -80px;
  left: 16px;
  z-index: 100;
  padding: 10px 16px;
  color: #fff;
  background: var(--ink);
  border-radius: 10px;
}
.skip:focus { top: 12px; }

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: 30;
  min-height: 84px;
  padding: 12px clamp(24px, 5.5vw, 84px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  background: rgba(255, 255, 255, .96);
  border-bottom: 1px solid rgba(220, 229, 222, .9);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}
.brand { display: flex; align-items: center; gap: 18px; min-width: 0; }
.brand img { width: 100px; flex: 0 0 auto; }
.brand span {
  padding-left: 18px;
  border-left: 1px solid #d2ddd5;
  color: var(--ink-2);
  font-size: 13px;
  letter-spacing: .14em;
  white-space: nowrap;
}
.header nav { display: flex; align-items: center; gap: 30px; font-size: 14px; }
.header nav a { display: inline-flex; align-items: center; min-height: 44px; white-space: nowrap; }
.header nav a:not(.nav-cta) { border-bottom: 1px solid transparent; }
.header nav a:not(.nav-cta):hover { border-bottom-color: var(--sage); }
.nav-cta {
  min-height: 42px !important;
  padding: 0 18px;
  color: #fff;
  background: var(--ink);
  border-radius: 999px;
}

/* Type and shared controls */
h1, h2, .footer-brand {
  font-family: "Songti SC", STSong, "SimSun", serif;
  font-weight: 500;
}
h1 { margin: 0 0 28px; font-size: clamp(44px, 4.4vw, 68px); line-height: 1.26; letter-spacing: .04em; }
h2 { margin: 0 0 24px; font-size: clamp(32px, 3vw, 46px); line-height: 1.42; letter-spacing: .025em; }
.eyebrow {
  margin: 0 0 18px;
  color: #667e71;
  font-size: 12px;
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: .18em;
  text-transform: uppercase;
}
.button {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  min-height: 50px;
  margin-top: 20px;
  padding: 0 22px;
  color: #fff;
  background: var(--ink);
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  transition: transform .2s ease, background .2s ease;
}
.button:hover { background: #28554b; transform: translateY(-1px); }
.text-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 4px 0;
  color: #224e44;
  border-bottom: 1px solid #9fb3a6;
  font-size: 14px;
  font-weight: 500;
}
.section { padding: 88px clamp(24px, 7vw, 108px); scroll-margin-top: 90px; }

/* Homepage */
.hero {
  min-height: 640px;
  display: grid;
  grid-template-columns: minmax(0, .94fr) minmax(0, 1.06fr);
  background: var(--soft);
}
.hero-copy { align-self: center; padding: 74px clamp(32px, 6vw, 92px) 64px clamp(42px, 10vw, 150px); }
.lead { margin: 0; color: #526d63; font-size: 16px; line-height: 2; }
.hero-note { display: flex; gap: 26px; margin-top: 36px; color: #6c8476; font-size: 11px; letter-spacing: .2em; }
.hero-visual { position: relative; min-width: 0; display: block; overflow: hidden; background: #e8eee7; }
.hero-visual > img { width: 100%; height: 100%; object-fit: cover; object-position: center; transition: transform .5s ease; }
.hero-visual:hover > img { transform: scale(1.015); }
.visual-caption {
  position: absolute;
  right: 26px;
  bottom: 26px;
  left: 26px;
  padding: 18px 22px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  background: rgba(255, 255, 255, .92);
  border: 1px solid rgba(255, 255, 255, .68);
  border-radius: 14px;
  box-shadow: 0 12px 34px rgba(24, 59, 55, .12);
  backdrop-filter: blur(10px);
}
.visual-caption span { color: #6c7d73; font-size: 11px; letter-spacing: .08em; }
.visual-caption b { font-size: 16px; font-weight: 500; }
.about { display: grid; grid-template-columns: .9fr 1.1fr; gap: 10%; align-items: start; }
.about-copy { max-width: 610px; padding-top: 18px; color: #566e63; }
.about-copy p { margin: 0 0 18px; }
.principles { padding-top: 18px; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 26px; }
.principles > div {
  padding: 30px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
}
.number { color: #8ca492; font-family: Georgia, serif; font-size: 30px; }
.principles h3 { margin: 24px 0 10px; font-size: 19px; font-weight: 600; }
.principles p { margin: 0; color: #66796f; font-size: 15px; }
.section-heading { margin-bottom: 36px; display: flex; justify-content: space-between; align-items: flex-end; gap: 30px; }
.section-heading > p { margin: 0 0 6px; color: #687d72; font-size: 15px; }
.product-preview { background: #fff; }
.product-directions { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.product-directions > a {
  min-height: 190px;
  padding: 28px;
  background: var(--soft);
  border: 1px solid #e0e7e1;
  border-radius: var(--radius-md);
  transition: transform .2s ease, box-shadow .2s ease;
}
.product-directions > a:hover { transform: translateY(-2px); box-shadow: var(--shadow); }
.product-directions h3 { margin: 16px 0 10px; font-size: 23px; font-weight: 500; }
.product-directions p, .product-note { color: #64786d; }
.product-directions p { margin: 0; font-size: 15px; }
.product-note { margin: 24px 0 0; font-size: 13px; }
.journal { background: var(--soft); }
.feature {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(320px, .7fr);
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}
.feature-image { min-height: 360px; display: flex; align-items: center; background: #f4efe3; overflow: hidden; }
.feature-image img { width: 100%; height: 100%; object-fit: cover; }
.feature-copy { align-self: center; padding: 46px; }
.feature-copy h3 { margin: 0 0 16px; font-family: "Songti SC", STSong, serif; font-size: 34px; line-height: 1.48; font-weight: 500; }
.feature-copy > p:not(.eyebrow) { color: #61756a; font-size: 15px; }
.contact { display: grid; grid-template-columns: 1.1fr .9fr; gap: 9%; align-items: center; background: #eaf1eb; }
.contact p { color: #586e63; }
.contact-card { padding: 34px; background: #fff; border: 1px solid #d5e0d7; border-radius: var(--radius-md); box-shadow: var(--shadow); }
.contact-card > span { color: #6d8275; font-size: 12px; font-weight: 600; letter-spacing: .16em; }
.contact-phone { display: block; margin: 10px 0; font-size: clamp(30px, 3vw, 42px); font-weight: 650; line-height: 1.25; white-space: nowrap; }
.contact-card p { margin: 7px 0; }
.contact-note { font-size: 13px; }
.follow { display: flex; justify-content: space-between; align-items: center; gap: 48px; color: #fff; background: var(--ink); }
.follow .eyebrow { color: #b6c9bd; }
.follow p:not(.eyebrow) { margin: 0; color: #d4dfd8; font-size: 15px; line-height: 2; }
.follow figure { flex: 0 0 210px; margin: 0; text-align: center; }
.follow img { width: 190px; margin: 0 auto; padding: 9px; background: #fff; border-radius: 12px; }
.follow figcaption { margin-top: 12px; color: #cddbd2; font-size: 12px; }

/* Product catalogue */
.catalog { max-width: 1320px; margin: 0 auto; padding: 68px clamp(24px, 7vw, 96px) 96px; }
.catalog-intro { max-width: 850px; }
.catalog-intro h1 { font-size: clamp(42px, 4vw, 58px); }
.catalog-intro > p:not(.eyebrow) { color: #5e7368; }
.catalog-nav { margin: 34px 0 66px; display: flex; flex-wrap: wrap; gap: 10px; }
.catalog-nav a {
  min-height: 44px;
  padding: 8px 18px;
  display: inline-flex;
  align-items: center;
  background: #fff;
  border: 1px solid #c9d6cd;
  border-radius: 999px;
  font-size: 14px;
}
.catalog-nav a:hover { color: #fff; background: var(--ink); border-color: var(--ink); }
.catalog-section { margin-bottom: 76px; scroll-margin-top: 110px; }
.catalog-heading { margin-bottom: 28px; }
.catalog-heading h2 { margin: 0 0 8px; font-size: 34px; }
.catalog-heading p { margin: 0; color: #697b71; }
.product-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 22px; }
.product-card {
  overflow: hidden;
  padding: 28px;
  background: #f2f6f1;
  border: 1px solid #dce6dd;
  border-radius: var(--radius-md);
}
.product-card.planned { background: #f8f7f3; border-color: #e5e0d7; }
.product-card-top { display: flex; justify-content: space-between; align-items: flex-start; gap: 14px; }
.product-type { color: #597064; font-size: 13px; }
.badge { flex: 0 0 auto; padding: 3px 10px; color: #31594a; border: 1px solid #bdcec1; border-radius: 999px; font-size: 11px; white-space: nowrap; }
.planned .badge { color: #766e5f; border-color: #d7d0c4; }
.product-card h3 { margin: 16px 0 14px; font-size: 22px; line-height: 1.5; font-weight: 600; }
.product-card dl { margin: 0; }
.product-card dt { margin: 14px 0 3px; color: #2c5748; font-size: 13px; font-weight: 650; }
.product-card dd { margin: 0; color: #5d7065; font-size: 14px; line-height: 1.75; }
.catalog-help { padding-top: 42px; border-top: 1px solid var(--line); }
.catalog-help h2 { margin-bottom: 14px; font-size: 30px; }
.catalog-help p { color: #60756a; }

/* Articles and brand page */
.article { max-width: 790px; margin: 0 auto; padding: 64px 28px 84px; }
.article h1 { font-size: 40px; }
.article h2 { margin-top: 44px; font-size: 27px; }
.article p { margin: 20px 0; }
.article .meta { color: #748278; font-size: 13px; }
.article .back { display: inline-flex; align-items: center; min-height: 44px; color: #6b7f72; font-size: 14px; }
.article .back + .eyebrow { margin-top: 14px; }
.article strong { font-weight: 650; }
.article sup { color: var(--accent); }
.article-cover, .article figure img { border-radius: var(--radius-md); }
.article .article-cover { margin: 30px 0; }
.article figure { margin: 32px 0; }
.article figcaption { margin-top: 10px; color: #7c887f; font-size: 12px; text-align: center; }
.article .reference { margin-top: 42px; padding-top: 20px; color: #738178; border-top: 1px solid var(--line); font-size: 13px; }
.article .reference a { text-decoration: underline; text-underline-offset: 3px; }
.prose-intro { color: #4e6b5e; font-size: 20px; }
.article blockquote { margin: 30px 0; padding: 22px 24px; background: var(--soft); border-left: 3px solid #96ae9b; border-radius: 0 14px 14px 0; }
.brand-keywords { margin: 22px 0 36px; display: flex; flex-wrap: wrap; gap: 9px; }
.brand-keywords span { padding: 7px 13px; background: #eef3ee; border: 1px solid #d8e3da; border-radius: 999px; font-size: 13px; }

/* Footer */
footer { padding: 38px clamp(24px, 7vw, 108px) 28px; background: #fff; border-top: 1px solid var(--line); }
.footer-top, .footer-bottom { display: flex; align-items: center; gap: 24px; }
.footer-top { justify-content: space-between; }
.footer-brand { font-size: 22px; }
.footer-top p { color: #6a7f72; font-size: 13px; }
.footer-bottom { margin-top: 22px; padding-top: 20px; border-top: 1px solid #e5ebe6; font-size: 12px; }
.footer-bottom span { margin-right: auto; }
.footer-bottom a { min-height: 38px; display: inline-flex; align-items: center; }
.footer-bottom .icp-link { white-space: nowrap; }
.fine { margin: 10px 0 0; color: #7b8980; font-size: 12px; }

@media (max-width: 960px) {
  .header { padding-inline: 28px; gap: 20px; }
  .header nav { gap: 18px; }
  .hero-copy { padding-left: 7vw; }
  .product-directions { grid-template-columns: 1fr; }
  .product-directions > a { min-height: 0; }
  .feature { grid-template-columns: 1fr; }
  .feature-image { min-height: 0; }
  .feature-image img { aspect-ratio: 16 / 7; }
  .product-grid { grid-template-columns: 1fr; }
}

/* Mobile layout */
@media (max-width: 700px) {
  html { scroll-padding-top: 112px; }
  body { font-size: 15px; line-height: 1.78; }
  .header {
    min-height: 0;
    padding: 9px 16px 8px;
    display: block;
    background: rgba(255, 255, 255, .98);
  }
  .brand { height: 42px; gap: 12px; }
  .brand img { width: 72px; }
  .brand span { padding-left: 12px; font-size: 10px; letter-spacing: .1em; }
  .header nav {
    width: 100%;
    margin-top: 6px;
    padding-bottom: 1px;
    display: flex;
    justify-content: space-between;
    gap: 3px;
    overflow-x: auto;
    scrollbar-width: none;
    font-size: 12px;
  }
  .header nav::-webkit-scrollbar { display: none; }
  .header nav a {
    min-width: max-content;
    min-height: 44px;
    padding: 0 10px;
    justify-content: center;
    color: #405e55;
    border: 0 !important;
    border-radius: 999px;
  }
  .header nav a:active { background: #eef3ee; }
  .header nav .nav-cta { min-height: 44px !important; padding-inline: 13px; color: #fff; background: var(--ink); }
  h1 { font-size: clamp(36px, 10vw, 43px); line-height: 1.24; letter-spacing: .02em; }
  h2 { font-size: clamp(29px, 8.2vw, 35px); line-height: 1.38; }
  .eyebrow { margin-bottom: 14px; font-size: 11px; letter-spacing: .16em; }
  .section { padding: 56px 20px; scroll-margin-top: 116px; }
  .hero { min-height: 0; display: block; padding-bottom: 20px; }
  .hero-copy { padding: 38px 20px 30px; }
  .hero-copy h1 { margin-bottom: 20px; }
  .lead { font-size: 15px; line-height: 1.85; }
  .desktop { display: none; }
  .hero-copy .button { width: 100%; }
  .hero-note { margin-top: 26px; justify-content: space-between; gap: 8px; font-size: 10px; letter-spacing: .18em; }
  .hero-visual { margin: 0 16px; aspect-ratio: 4 / 3; border-radius: 20px; }
  .hero-visual > img { height: 100%; }
  .visual-caption { right: 12px; bottom: 12px; left: 12px; padding: 13px 15px; border-radius: 12px; }
  .visual-caption span { font-size: 10px; }
  .visual-caption b { font-size: 14px; }
  .about { display: block; }
  .about h2 { margin-bottom: 20px; }
  .about-copy { padding-top: 0; }
  .about-copy p { margin-bottom: 15px; }
  .principles { padding-top: 0; display: grid; grid-template-columns: 1fr; gap: 12px; }
  .principles > div { padding: 21px; display: grid; grid-template-columns: 42px 1fr; column-gap: 12px; border-radius: 16px; }
  .number { grid-row: 1 / 3; font-size: 25px; line-height: 1.2; }
  .principles h3 { margin: 0 0 5px; font-size: 17px; }
  .principles p { margin: 0; font-size: 14px; }
  .section-heading { margin-bottom: 25px; display: block; }
  .section-heading > p { margin: -6px 0 0; font-size: 14px; }
  .product-directions {
    width: calc(100% + 20px);
    padding-right: 20px;
    display: grid;
    grid-auto-flow: column;
    grid-auto-columns: min(82vw, 310px);
    grid-template-columns: none;
    gap: 12px;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    scrollbar-width: none;
  }
  .product-directions::-webkit-scrollbar { display: none; }
  .product-directions > a { min-height: 184px; padding: 22px; scroll-snap-align: start; border-radius: 16px; }
  .product-directions h3 { margin: 14px 0 8px; font-size: 21px; }
  .product-directions p { font-size: 14px; }
  .product-note { margin-top: 17px; font-size: 12px; }
  .journal { padding-top: 58px; }
  .feature { display: block; border-radius: 19px; }
  .feature-image { min-height: 0; }
  .feature-image img { aspect-ratio: 16 / 8.6; object-fit: cover; }
  .feature-copy { padding: 24px 20px 26px; }
  .feature-copy h3 { margin-bottom: 12px; font-size: 28px; line-height: 1.42; }
  .feature-copy > p:not(.eyebrow) { font-size: 14px; }
  .contact { display: block; }
  .contact h2 { margin-bottom: 14px; }
  .contact > div:first-child > p:last-child { margin-bottom: 24px; }
  .contact-card { padding: 22px 20px; border-radius: 16px; }
  .contact-phone { margin: 8px 0 10px; font-size: clamp(28px, 8.5vw, 34px); letter-spacing: -.02em; white-space: normal; }
  .follow { display: block; text-align: center; }
  .follow p:not(.eyebrow) { font-size: 14px; }
  .follow figure { margin: 30px auto 0; }
  .follow img { width: 166px; }
  .button { min-height: 48px; padding-inline: 20px; }

  .catalog { padding: 38px 16px 68px; }
  .catalog-intro { padding: 0 4px; }
  .catalog-intro h1 { margin-bottom: 18px; font-size: clamp(34px, 9.5vw, 40px); }
  .catalog-intro .prose-intro { margin-bottom: 8px; }
  .catalog-nav {
    width: calc(100% + 16px);
    margin: 26px 0 50px;
    padding: 4px 16px 4px 4px;
    flex-wrap: nowrap;
    gap: 8px;
    overflow-x: auto;
    scrollbar-width: none;
  }
  .catalog-nav::-webkit-scrollbar { display: none; }
  .catalog-nav a { flex: 0 0 auto; min-height: 44px; padding: 7px 15px; background: #fff; font-size: 13px; }
  .catalog-section { margin-bottom: 56px; scroll-margin-top: 112px; }
  .catalog-heading { margin: 0 4px 20px; }
  .catalog-heading h2 { font-size: 27px; }
  .catalog-heading p { font-size: 14px; }
  .product-grid { display: grid; grid-template-columns: 1fr; gap: 12px; }
  .product-card { padding: 21px 19px; border-radius: 16px; }
  .product-card-top { gap: 10px; }
  .product-type { font-size: 12px; }
  .badge { padding: 3px 9px; font-size: 10px; }
  .product-card h3 { margin: 14px 0 12px; font-size: 20px; line-height: 1.45; }
  .product-card dt { margin-top: 12px; }
  .product-card dd { font-size: 13px; line-height: 1.72; }
  .catalog-help { margin: 0 4px; padding-top: 32px; }
  .catalog-help h2 { font-size: 27px; }

  .article { width: 100%; padding: 30px 20px 64px; }
  .article .back { margin-bottom: 5px; }
  .article h1 { margin-bottom: 20px; font-size: clamp(33px, 9.2vw, 39px); line-height: 1.3; }
  .article h2 { margin-top: 38px; font-size: 24px; line-height: 1.48; }
  .article p { margin: 17px 0; }
  .article .article-cover { margin: 24px 0; border-radius: 16px; }
  .article figure { margin: 26px -4px; }
  .article figure img { border-radius: 16px; }
  .article blockquote { padding: 18px; }
  .article .button { width: 100%; }
  .prose-intro { font-size: 18px; }
  .brand-keywords { margin-bottom: 30px; }

  footer { padding: 30px 20px 24px; }
  .footer-top { display: block; }
  .footer-brand { font-size: 21px; }
  .footer-top p { margin: 5px 0 0; }
  .footer-bottom { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 2px 12px; }
  .footer-bottom span, .footer-bottom .icp-link { grid-column: 1 / -1; }
  .footer-bottom span { margin: 0 0 6px; line-height: 1.65; }
  .footer-bottom a { min-height: 44px; }
  .fine { margin-top: 12px; line-height: 1.65; }
}

@media (max-width: 370px) {
  .header { padding-inline: 12px; }
  .header nav a { padding-inline: 7px; font-size: 11px; }
  .header nav .nav-cta { padding-inline: 10px; }
  .section { padding-inline: 16px; }
  .hero-copy { padding-inline: 16px; }
  .hero-visual { margin-inline: 12px; }
  .contact-phone { font-size: 27px; }
  .article { padding-inline: 16px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}

/* Product visuals */
.product-visual{margin:0 0 20px;background:#f3f5f0;border-radius:14px;overflow:hidden}.product-visual img{display:block;width:100%;height:auto;aspect-ratio:1;object-fit:contain}.product-visual figcaption{text-align:center;font-size:12px;color:#71857d;padding:0 12px 12px}.product-description{font-size:15px;line-height:1.75;color:#405b54;margin:0 0 20px}.product-description strong{color:#173b38;font-weight:650}