:root {
  --abyss: #071d18;
  --kelp: #123d31;
  --pearl: #f0eadc;
  --paper: #f7f2e7;
  --brass: #b99655;
  --ink: #101b17;
  --muted: #5f6862;
  --line: rgba(16, 27, 23, 0.18);
  --light-line: rgba(240, 234, 220, 0.22);
  --sans: "Microsoft YaHei UI", "PingFang SC", "Noto Sans CJK SC", sans-serif;
  --serif: "Songti SC", "STSong", "Noto Serif CJK SC", serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--pearl);
  color: var(--ink);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
  overflow-x: clip;
}
img { display: block; width: 100%; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; }
button, a, input, select, textarea { -webkit-tap-highlight-color: transparent; }
button:focus-visible, a:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible { outline: 3px solid #d9bd81; outline-offset: 4px; }
::selection { color: var(--abyss); background: var(--brass); }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  z-index: 1000;
  top: 0;
  left: 1rem;
  padding: .8rem 1rem;
  color: var(--abyss);
  background: var(--pearl);
  transform: translateY(-120%);
}
.skip-link:focus { transform: translateY(0); }

.site-header {
  position: fixed;
  z-index: 100;
  top: 0;
  left: 0;
  right: 0;
  height: 78px;
  padding: 0 clamp(1.2rem, 4vw, 4.8rem);
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--pearl);
  background: linear-gradient(180deg, rgba(7,29,24,.92), rgba(7,29,24,.68));
  border-bottom: 1px solid rgba(185, 150, 85, .36);
  backdrop-filter: blur(12px);
}

.brand { display: flex; align-items: center; gap: .9rem; min-height: 52px; }
.brand-mark {
  width: 42px;
  height: 42px;
  fill: none;
  stroke: var(--brass);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex: 0 0 auto;
}
.brand-copy { display: grid; gap: .18rem; }
.brand-copy strong { font-family: var(--serif); font-size: 1.12rem; letter-spacing: .18em; }
.brand-copy small { font-size: .63rem; letter-spacing: .08em; color: rgba(240,234,220,.7); }
.site-nav { display: flex; align-items: center; gap: clamp(1.4rem, 2.6vw, 3.6rem); }
.site-nav a { position: relative; padding: 1.6rem 0; font-size: .82rem; letter-spacing: .12em; }
.site-nav a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: 1rem; height: 1px; background: var(--brass); transition: right .35s ease; }
.site-nav a:hover::after, .site-nav a:focus-visible::after { right: 0; }
.menu-toggle { display: none; }

.hero { position: relative; min-height: 100svh; color: var(--pearl); overflow: hidden; background: var(--abyss); }
.hero-image, .contact-image { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.hero-wash {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(4,18,15,.94) 0%, rgba(4,18,15,.72) 38%, rgba(4,18,15,.18) 72%, rgba(4,18,15,.38) 100%), linear-gradient(0deg, rgba(4,18,15,.78), transparent 45%);
}
.hero-content {
  position: relative;
  z-index: 2;
  width: min(790px, 72vw);
  padding: clamp(10rem, 19vh, 14rem) 0 7rem clamp(1.4rem, 9vw, 10.5rem);
}
.eyebrow, .section-index, .chapter-label {
  margin: 0;
  font-size: .72rem;
  letter-spacing: .3em;
  text-transform: uppercase;
  color: var(--brass);
}
.hero h1 {
  margin: clamp(1.4rem, 3vh, 2.4rem) 0 1.6rem;
  font-family: var(--serif);
  font-size: clamp(3.4rem, 7.8vw, 8.2rem);
  font-weight: 600;
  line-height: .95;
  letter-spacing: -.065em;
  text-wrap: balance;
}
.hero-lead { width: min(35rem, 100%); margin: 0; color: rgba(240,234,220,.78); font-size: clamp(1rem, 1.3vw, 1.25rem); line-height: 1.9; }
.hero-actions { display: flex; align-items: center; gap: 2rem; margin-top: 2.5rem; }
.button {
  min-height: 48px;
  padding: .85rem 1.35rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--brass);
  cursor: pointer;
  letter-spacing: .1em;
  transition: color .25s ease, background .25s ease, transform .25s ease;
}
.button-solid { color: var(--abyss); background: var(--brass); }
.button:hover, .button:focus-visible { transform: translateY(-2px); }
.button-solid:hover, .button-solid:focus-visible { color: var(--pearl); background: transparent; }
.text-link { display: inline-flex; gap: .7rem; align-items: center; min-height: 44px; font-size: .84rem; letter-spacing: .08em; border-bottom: 1px solid rgba(240,234,220,.4); }
.text-link span { color: var(--brass); transition: transform .25s ease; }
.text-link:hover span, .text-link:focus-visible span { transform: translate(.2rem, -.15rem); }
.text-link.dark { border-color: var(--line); }
.hero-register { position: absolute; z-index: 3; top: 20%; right: clamp(1rem, 3vw, 3rem); bottom: 16%; display: flex; flex-direction: column; align-items: center; color: var(--brass); }
.hero-register i { width: 1px; flex: 1; background: var(--brass); opacity: .58; }
.hero-register span { margin: 1rem 0; font-size: .58rem; letter-spacing: .32em; writing-mode: vertical-rl; }
.hero-register b { font-weight: 400; font-size: .72rem; }
.hero-caption { position: absolute; z-index: 2; right: clamp(2.2rem, 8vw, 10rem); bottom: 2rem; margin: 0; color: rgba(240,234,220,.64); font-family: var(--serif); font-size: .78rem; letter-spacing: .15em; }

.signal-strip {
  min-height: 78px;
  padding: 1.2rem clamp(1.2rem, 5vw, 6rem);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(.8rem, 2vw, 2rem);
  flex-wrap: wrap;
  color: var(--pearl);
  background: var(--abyss);
  border-top: 1px solid var(--light-line);
  border-bottom: 1px solid var(--light-line);
}
.signal-strip span { font-size: .72rem; letter-spacing: .2em; }
.signal-strip i { width: 5px; height: 5px; border: 1px solid var(--brass); transform: rotate(45deg); }

.section-pad { padding: clamp(5rem, 10vw, 10rem) clamp(1.4rem, 8vw, 9rem); }
.manifesto { display: grid; grid-template-columns: minmax(150px, .7fr) 2.6fr; gap: 4vw; background: var(--paper); }
.manifesto-copy { max-width: 1050px; }
.manifesto h2, .role-intro h2, .journey h2, .contact h2, .atlas-heading h2 {
  margin: 0;
  font-family: var(--serif);
  font-weight: 500;
  line-height: 1.13;
  letter-spacing: -.045em;
}
.manifesto h2 { font-size: clamp(2.35rem, 5vw, 5.8rem); }
.manifesto h2 em, .role-intro h2 em { color: var(--brass); font-weight: 400; }
.manifesto-copy > p { max-width: 42rem; margin: 2.5rem 0 0 auto; font-size: 1rem; line-height: 2; color: var(--muted); }

.product-atlas { position: relative; background: var(--pearl); }
.atlas-heading { display: grid; grid-template-columns: minmax(150px,.7fr) 1.65fr 1fr; gap: 4vw; align-items: end; border-top: 1px solid var(--line); }
.atlas-heading h2 { font-size: clamp(2.6rem, 5.4vw, 6.2rem); }
.atlas-heading > p:last-child { margin: 0; line-height: 1.9; color: var(--muted); }
.product-chapter { min-height: 780px; display: grid; align-items: center; border-top: 1px solid var(--line); overflow: hidden; }
.product-chapter figure { margin: 0; height: 100%; min-height: 620px; overflow: hidden; }
.product-chapter img { height: 100%; object-fit: cover; transition: transform 1.1s cubic-bezier(.2,.7,.2,1); }
.product-chapter:hover img { transform: scale(1.025); }
.chapter-copy { position: relative; padding: clamp(4rem, 8vw, 8rem); }
.chapter-copy h3 { margin: 2rem 0 1.2rem; font-family: var(--serif); font-size: clamp(2.7rem, 5vw, 5.5rem); font-weight: 500; letter-spacing: -.05em; }
.chapter-copy > p:not(.chapter-label) { max-width: 30rem; margin: 0 0 2rem; color: var(--muted); line-height: 1.9; }
.chapter-no { position: absolute; right: 2rem; top: 1.5rem; font-family: var(--serif); font-size: clamp(5rem, 10vw, 11rem); color: rgba(16,27,23,.065); }
.chapter-dry { grid-template-columns: 1.35fr .8fr; }
.chapter-ready { grid-template-columns: .82fr 1.28fr; background: var(--paper); }
.chapter-ready figure { order: 2; }
.chapter-ready .chapter-copy { order: 1; }
.chapter-dish { grid-template-columns: 1.15fr .85fr; }

.role-section { color: var(--pearl); background: var(--abyss); }
.role-intro { display: grid; grid-template-columns: minmax(150px,.7fr) 1.8fr 1fr; gap: 4vw; align-items: end; }
.section-index.light { color: var(--brass); }
.role-intro h2 { font-size: clamp(2.7rem, 5.4vw, 6rem); }
.role-intro > p:last-child { margin: 0; color: rgba(240,234,220,.7); line-height: 1.9; }
.role-visuals { display: grid; grid-template-columns: 1.25fr .75fr; gap: 1px; background: var(--brass); border-top: 1px solid rgba(185,150,85,.55); border-bottom: 1px solid rgba(185,150,85,.55); }
.role-figure { position: relative; min-height: 620px; margin: 0; overflow: hidden; background: var(--abyss); }
.role-figure img { width: 100%; height: 100%; min-height: 620px; object-fit: cover; filter: saturate(.85); }
.role-figure::after { content: ""; position: absolute; inset: 0; background: linear-gradient(0deg, rgba(7,29,24,.9), transparent 52%); }
.role-figure figcaption { position: absolute; z-index: 2; left: clamp(1.5rem, 4vw, 4rem); right: 2rem; bottom: 2.4rem; display: grid; gap: .5rem; }
.role-figure figcaption b { font-family: var(--serif); font-size: clamp(1.8rem, 3vw, 3.5rem); font-weight: 500; }
.role-figure figcaption span { color: rgba(240,234,220,.72); font-size: .9rem; }

.journey { display: grid; grid-template-columns: 1.2fr .8fr; min-height: 820px; background: var(--paper); }
.journey-image { min-height: 680px; }
.journey-image img { height: 100%; object-fit: cover; }
.journey-copy { align-self: center; }
.journey h2 { margin: 1.8rem 0 3rem; font-size: clamp(2.7rem, 4.8vw, 5.4rem); }
.journey ol { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.journey li { padding: 1.6rem 0; display: grid; grid-template-columns: 54px 1fr; gap: 1rem; border-bottom: 1px solid var(--line); }
.journey li > span { color: var(--brass); font-family: var(--serif); font-size: 1.25rem; }
.journey li b { font-family: var(--serif); font-size: 1.25rem; font-weight: 500; }
.journey li p { margin: .5rem 0 0; color: var(--muted); line-height: 1.7; }

.contact { position: relative; min-height: 980px; color: var(--pearl); background: var(--abyss); overflow: hidden; }
.contact-wash { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(7,29,24,.96), rgba(7,29,24,.72) 52%, rgba(7,29,24,.28)), linear-gradient(0deg, rgba(7,29,24,.92), transparent 55%); }
.contact-shell { position: relative; z-index: 2; min-height: 980px; padding: clamp(7rem, 11vw, 11rem) clamp(1.4rem, 8vw, 9rem); display: grid; grid-template-columns: 1.1fr .78fr; align-items: center; gap: 8vw; }
.contact h2 { margin: 2rem 0 3rem; font-size: clamp(3.2rem, 6vw, 6.8rem); }
.contact dl { margin: 0; border-top: 1px solid var(--light-line); }
.contact dl div { padding: 1.25rem 0; display: grid; grid-template-columns: 160px 1fr; gap: 1rem; border-bottom: 1px solid var(--light-line); }
.contact dt { color: rgba(240,234,220,.58); font-size: .78rem; }
.contact dd { margin: 0; line-height: 1.6; }
.contact dd a { text-decoration: underline; text-decoration-color: rgba(185,150,85,.65); text-underline-offset: .25rem; }
.contact dd a { display: inline-flex; align-items: center; min-height: 44px; }
.contact-form { padding: clamp(2rem, 4vw, 4rem); background: rgba(7,29,24,.87); border: 1px solid rgba(185,150,85,.58); backdrop-filter: blur(10px); }
.form-heading { margin-bottom: 1.8rem; display: flex; align-items: baseline; justify-content: space-between; gap: 1rem; }
.form-heading span { font-family: var(--serif); font-size: 2rem; }
.form-heading small { color: var(--brass); font-size: .62rem; letter-spacing: .2em; }
.contact-form label { display: grid; gap: .55rem; margin-bottom: 1.25rem; }
.contact-form label > span { color: rgba(240,234,220,.68); font-size: .75rem; letter-spacing: .12em; }
.contact-form input, .contact-form select, .contact-form textarea {
  width: 100%;
  min-height: 50px;
  padding: .75rem 0;
  color: var(--pearl);
  background: transparent;
  border: 0;
  border-bottom: 1px solid rgba(240,234,220,.38);
  outline: none;
  resize: vertical;
}
.contact-form select { color-scheme: dark; }
.contact-form input:focus, .contact-form select:focus, .contact-form textarea:focus { border-color: var(--brass); box-shadow: 0 2px 0 rgba(185,150,85,.35); }
.contact-form .button { margin-top: .7rem; width: 100%; }
.form-status { min-height: 1.5rem; margin: 1rem 0 0; color: var(--brass); font-size: .78rem; line-height: 1.6; }

.site-footer { padding: 3rem clamp(1.4rem, 6vw, 7rem); color: var(--pearl); background: #04120f; border-top: 1px solid rgba(185,150,85,.42); }
.footer-brand { display: flex; align-items: center; gap: 1rem; }
.footer-brand div { display: grid; gap: .4rem; }
.footer-brand strong { font-family: var(--serif); font-weight: 500; letter-spacing: .08em; }
.footer-brand span { color: rgba(240,234,220,.55); font-size: .72rem; letter-spacing: .12em; }
.footer-meta { margin-top: 2.5rem; padding-top: 1.4rem; display: flex; justify-content: space-between; gap: 1rem; color: rgba(240,234,220,.5); border-top: 1px solid rgba(240,234,220,.12); font-size: .68rem; letter-spacing: .08em; }

.reveal { opacity: 0; transform: translateY(28px); transition: opacity .8s ease, transform .8s cubic-bezier(.2,.7,.2,1); }
.reveal.is-visible { opacity: 1; transform: none; }

@media (max-width: 980px) {
  .site-header { height: 70px; }
  .brand-copy small { display: none; }
  .menu-toggle { width: 48px; height: 48px; display: grid; place-content: center; gap: 5px; color: inherit; background: transparent; border: 1px solid rgba(185,150,85,.45); cursor: pointer; }
  .menu-toggle span { width: 22px; height: 1px; background: currentColor; transition: transform .25s ease, opacity .25s ease; }
  .menu-open .menu-toggle span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
  .menu-open .menu-toggle span:nth-child(2) { opacity: 0; }
  .menu-open .menu-toggle span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }
  .site-nav { position: absolute; top: 70px; left: 0; right: 0; padding: 1rem 1.4rem 1.6rem; display: none; flex-direction: column; align-items: stretch; gap: 0; background: rgba(7,29,24,.98); border-bottom: 1px solid rgba(185,150,85,.45); }
  .menu-open .site-nav { display: flex; }
  .site-nav a { min-height: 50px; padding: 1rem 0; border-bottom: 1px solid rgba(240,234,220,.12); }
  .site-nav a::after { display: none; }
  .hero-content { width: min(760px, 88vw); padding-left: clamp(1.4rem, 7vw, 5rem); }
  .manifesto, .atlas-heading, .role-intro { grid-template-columns: 1fr; }
  .manifesto-copy > p { margin-left: 0; }
  .atlas-heading > p:last-child, .role-intro > p:last-child { max-width: 38rem; }
  .product-chapter { min-height: 0; grid-template-columns: 1fr; }
  .product-chapter figure { min-height: 55vw; height: 55vw; }
  .chapter-ready figure, .chapter-ready .chapter-copy { order: initial; }
  .role-visuals { grid-template-columns: 1fr; }
  .role-figure, .role-figure img { min-height: 70vw; }
  .journey { grid-template-columns: 1fr; }
  .journey-image { height: 70vw; min-height: 460px; }
  .contact-shell { grid-template-columns: 1fr; }
  .contact-form { max-width: 680px; }
}

@media (max-width: 560px) {
  .site-header { padding: 0 1rem; }
  .brand { gap: .55rem; }
  .brand-mark { width: 36px; height: 36px; }
  .brand-copy strong { font-size: .98rem; letter-spacing: .08em; }
  .hero { min-height: 840px; }
  .hero-image { object-position: 58% center; }
  .hero-wash { background: linear-gradient(0deg, rgba(4,18,15,.96) 0%, rgba(4,18,15,.62) 64%, rgba(4,18,15,.35)); }
  .hero-content { width: auto; padding: 9.5rem 1.25rem 7rem; }
  .hero h1 { font-size: clamp(3.55rem, 18vw, 5.3rem); }
  .hero-lead { font-size: .95rem; line-height: 1.8; }
  .hero-actions { align-items: stretch; flex-direction: column; gap: .7rem; }
  .hero-actions .text-link { justify-content: center; }
  .hero-register { display: none; }
  .hero-caption { left: 1.25rem; right: 1.25rem; bottom: 1.5rem; font-size: .66rem; }
  .signal-strip { justify-content: flex-start; gap: .7rem 1rem; }
  .signal-strip span { font-size: .64rem; letter-spacing: .14em; }
  .section-pad { padding: 4.5rem 1.25rem; }
  .manifesto h2 { margin-top: 1.4rem; }
  .atlas-heading h2, .role-intro h2 { margin-top: 1.4rem; }
  .product-chapter figure { height: 72vw; min-height: 300px; }
  .chapter-copy { padding: 3.4rem 1.25rem 4rem; }
  .chapter-copy h3 { font-size: 2.85rem; }
  .chapter-no { right: 1rem; top: .8rem; }
  .role-figure, .role-figure img { min-height: 430px; }
  .role-figure figcaption { left: 1.25rem; right: 1.25rem; }
  .journey-image { min-height: 380px; height: 92vw; }
  .journey h2 { margin-top: 1.4rem; }
  .contact { min-height: 1200px; }
  .contact-image { object-position: 68% center; }
  .contact-shell { min-height: 1200px; padding: 5rem 1.25rem; gap: 3rem; }
  .contact dl div { grid-template-columns: 1fr; gap: .45rem; }
  .contact-form { padding: 1.5rem 1.2rem; }
  .form-heading { align-items: flex-start; flex-direction: column; }
  .footer-meta { flex-direction: column; }
}

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