:root {
  --ink: #101312;
  --muted: #5d6662;
  --line: #d7ded8;
  --paper: #f7f8f5;
  --paper-strong: #ffffff;
  --panel: #eef3ef;
  --teal: #0d7a82;
  --teal-deep: #06484d;
  --copper: #b96035;
  --gold: #a88a3e;
  --shadow: 0 22px 60px rgba(16, 19, 18, 0.13);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 92px;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(90deg, rgba(16, 19, 18, 0.04) 1px, transparent 1px) 0 0 / 72px 72px,
    linear-gradient(180deg, rgba(16, 19, 18, 0.03) 1px, transparent 1px) 0 0 / 72px 72px,
    var(--paper);
  font-family:
    "PingFang SC",
    "Hiragino Sans GB",
    "Microsoft YaHei",
    Arial,
    sans-serif;
  font-size: 16px;
  line-height: 1.7;
  letter-spacing: 0;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  display: block;
  max-width: 100%;
}

button,
input,
textarea {
  font: inherit;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  height: 76px;
  padding: 0 42px;
  color: var(--paper-strong);
  transition:
    background 180ms ease,
    color 180ms ease,
    border-color 180ms ease;
}

.site-header.is-scrolled,
.site-header.is-open {
  color: var(--ink);
  background: rgba(247, 248, 245, 0.9);
  border-bottom: 1px solid rgba(16, 19, 18, 0.08);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border: 1px solid currentColor;
  border-radius: 8px;
  font-size: 13px;
}

.brand-text {
  font-size: 15px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px;
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: 8px;
  background: rgba(16, 19, 18, 0.12);
  backdrop-filter: blur(14px);
}

.site-header.is-scrolled .site-nav,
.site-header.is-open .site-nav {
  border-color: rgba(16, 19, 18, 0.1);
  background: rgba(255, 255, 255, 0.64);
}

.site-nav a {
  min-width: 56px;
  padding: 8px 12px;
  border-radius: 8px;
  color: currentColor;
  font-size: 14px;
  text-align: center;
}

.site-nav a:hover,
.site-nav a.is-active {
  background: var(--ink);
  color: var(--paper-strong);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid currentColor;
  border-radius: 8px;
  color: inherit;
  background: transparent;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 4px auto;
  background: currentColor;
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(340px, 0.95fr);
  align-items: end;
  min-height: 92vh;
  padding: 150px 6vw 70px;
  color: var(--paper-strong);
  background:
    linear-gradient(115deg, rgba(8, 18, 17, 0.98) 0%, rgba(8, 18, 17, 0.93) 42%, rgba(8, 18, 17, 0.34) 100%),
    #101312;
  overflow: hidden;
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 42%;
  background: linear-gradient(180deg, rgba(16, 19, 18, 0) 0%, rgba(16, 19, 18, 0.92) 100%);
  pointer-events: none;
}

.hero-background {
  position: absolute;
  inset: 0;
  opacity: 0.5;
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.08) 1px, transparent 1px) 0 0 / 92px 92px,
    linear-gradient(180deg, rgba(255, 255, 255, 0.06) 1px, transparent 1px) 0 0 / 92px 92px;
}

.hero-copy {
  position: relative;
  z-index: 2;
  max-width: 740px;
}

.eyebrow,
.section-kicker {
  margin: 0 0 18px;
  color: var(--copper);
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
}

.hero h1 {
  margin: 0;
  font-size: 74px;
  line-height: 1.03;
  letter-spacing: 0;
}

.hero-lead {
  margin: 18px 0 0;
  color: rgba(255, 255, 255, 0.9);
  font-size: 25px;
  font-weight: 700;
  line-height: 1.35;
}

.hero-summary {
  max-width: 680px;
  margin: 22px 0 0;
  color: rgba(255, 255, 255, 0.76);
  font-size: 18px;
}

.hero-actions,
.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 12px 20px;
  border: 1px solid transparent;
  border-radius: 8px;
  font-weight: 800;
  line-height: 1.2;
  transition:
    transform 160ms ease,
    background 160ms ease,
    color 160ms ease,
    border-color 160ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button.primary {
  color: var(--paper-strong);
  background: var(--teal);
}

.button.primary:hover {
  background: var(--teal-deep);
}

.button.secondary {
  color: var(--paper-strong);
  border-color: rgba(255, 255, 255, 0.38);
  background: rgba(255, 255, 255, 0.09);
}

.button.secondary:hover {
  background: rgba(255, 255, 255, 0.18);
}

.hero-facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  max-width: 650px;
  margin: 44px 0 0;
  padding: 0;
  border-top: 1px solid rgba(255, 255, 255, 0.22);
}

.hero-facts div {
  padding: 20px 24px 0 0;
}

.hero-facts dt {
  color: rgba(255, 255, 255, 0.55);
  font-size: 13px;
}

.hero-facts dd {
  margin: 4px 0 0;
  color: var(--paper-strong);
  font-size: 24px;
  font-weight: 800;
}

.hero-portrait {
  position: relative;
  z-index: 2;
  justify-self: end;
  width: min(390px, 78vw);
  margin: 0;
}

.hero-portrait::before {
  content: "";
  position: absolute;
  inset: -16px 18px 16px -18px;
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: 8px;
}

.hero-portrait img {
  position: relative;
  z-index: 1;
  width: 100%;
  aspect-ratio: 390 / 502;
  object-fit: cover;
  border-radius: 8px;
  box-shadow: 0 34px 80px rgba(0, 0, 0, 0.42);
}

.hero-portrait figcaption {
  position: relative;
  z-index: 2;
  width: calc(100% - 28px);
  margin: -34px auto 0;
  padding: 12px 14px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 8px;
  color: rgba(255, 255, 255, 0.9);
  background: rgba(16, 19, 18, 0.72);
  backdrop-filter: blur(14px);
  font-size: 13px;
  text-align: center;
}

.section {
  width: min(1180px, calc(100% - 48px));
  margin: 0 auto;
  padding: 110px 0;
  scroll-margin-top: 92px;
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(240px, 0.55fr) minmax(0, 0.85fr);
  gap: 54px;
  align-items: end;
  margin-bottom: 42px;
}

.section-heading h2 {
  margin: 0;
  font-size: 44px;
  line-height: 1.12;
  letter-spacing: 0;
}

.section-heading p {
  margin: 0;
  color: var(--muted);
  font-size: 17px;
}

.intro-grid {
  display: grid;
  grid-template-columns: 160px minmax(0, 1fr);
  gap: 0 54px;
}

.intro-grid .section-kicker {
  grid-row: span 2;
  margin-top: 8px;
}

.profile-article {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 26px;
  margin-bottom: 28px;
}

.profile-article p {
  margin: 0;
  padding-top: 22px;
  border-top: 2px solid var(--ink);
  color: #27312d;
  font-size: 18px;
}

.info-panel {
  display: grid;
  grid-column: 2;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.66);
  box-shadow: var(--shadow);
}

.info-row {
  min-height: 138px;
  padding: 22px;
  border-right: 1px solid var(--line);
}

.info-row:last-child {
  border-right: 0;
}

.info-row span {
  display: block;
  margin-bottom: 16px;
  color: var(--muted);
  font-size: 13px;
}

.info-row strong {
  display: block;
  font-size: 16px;
  line-height: 1.45;
}

.timeline-section {
  border-top: 1px solid var(--line);
}

.timeline {
  border-top: 1px solid var(--ink);
}

.timeline-item {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: 44px;
  padding: 34px 0;
  border-bottom: 1px solid var(--line);
}

.timeline-item time {
  color: var(--teal);
  font-size: 20px;
  font-weight: 900;
}

.timeline-item h3,
.field-card h3,
.product-card h3,
.signature-product h3,
.media-feature h3 {
  margin: 0;
  font-size: 24px;
  line-height: 1.28;
}

.timeline-item p,
.field-card p,
.product-card p,
.signature-product p,
.media-feature p {
  margin: 12px 0 0;
  color: var(--muted);
}

.fields-section,
.sources-section {
  border-top: 1px solid var(--line);
}

.field-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  background: var(--paper-strong);
}

.field-card {
  min-height: 286px;
  padding: 26px;
  border-right: 1px solid var(--line);
  background:
    linear-gradient(180deg, rgba(13, 122, 130, 0.08), rgba(255, 255, 255, 0)),
    #fff;
}

.field-card:last-child {
  border-right: 0;
}

.field-card span {
  display: inline-grid;
  place-items: center;
  width: 42px;
  height: 42px;
  margin-bottom: 50px;
  border: 1px solid var(--teal);
  border-radius: 50%;
  color: var(--teal);
  font-size: 13px;
  font-weight: 900;
}

.products-section {
  width: 100%;
  max-width: none;
  padding: 112px 6vw;
  color: var(--paper-strong);
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.07) 1px, transparent 1px) 0 0 / 88px 88px,
    linear-gradient(180deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px) 0 0 / 88px 88px,
    #151817;
}

.products-section .section-heading,
.products-section .section-kicker,
.products-section .section-heading p {
  width: min(1180px, 100%);
  margin-left: auto;
  margin-right: auto;
}

.products-section .section-heading p,
.signature-product p,
.product-card p {
  color: rgba(255, 255, 255, 0.68);
}

.product-layout {
  display: grid;
  grid-template-columns: minmax(320px, 0.95fr) minmax(0, 1.25fr);
  gap: 22px;
  width: min(1180px, 100%);
  margin: 0 auto;
}

.signature-product {
  min-height: 420px;
  padding: 36px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 8px;
  background:
    linear-gradient(145deg, rgba(13, 122, 130, 0.45), rgba(185, 96, 53, 0.2)),
    #101312;
}

.signature-product h3 {
  margin-top: 92px;
  font-size: 48px;
}

.product-list {
  display: grid;
  gap: 22px;
}

.product-card {
  padding: 28px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.05);
}

.media-section {
  border-top: 1px solid var(--line);
}

.media-feature {
  display: grid;
  grid-template-columns: 300px minmax(0, 1fr);
  gap: 52px;
  align-items: start;
  padding: 38px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

.media-feature time {
  display: inline-block;
  margin-bottom: 18px;
  color: var(--copper);
  font-weight: 900;
}

.media-feature p {
  margin: 0;
  font-size: 18px;
}

.source-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.source-card {
  min-height: 190px;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper-strong);
  transition:
    transform 160ms ease,
    border-color 160ms ease,
    box-shadow 160ms ease;
}

.source-card:hover {
  transform: translateY(-3px);
  border-color: rgba(13, 122, 130, 0.42);
  box-shadow: var(--shadow);
}

.source-card span,
.source-card small {
  display: block;
  color: var(--muted);
}

.source-card strong {
  display: block;
  margin: 28px 0 12px;
  font-size: 22px;
  line-height: 1.35;
}

.contact-section {
  padding: 96px 24px;
  background: var(--ink);
  color: var(--paper-strong);
  scroll-margin-top: 92px;
}

.contact-inner {
  width: min(980px, 100%);
  margin: 0 auto;
  text-align: center;
}

.contact-inner h2 {
  margin: 0;
  font-size: 42px;
  line-height: 1.18;
}

.contact-inner p:not(.eyebrow) {
  max-width: 720px;
  margin: 18px auto 0;
  color: rgba(255, 255, 255, 0.7);
}

.contact-actions {
  justify-content: center;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 28px 42px;
  color: var(--muted);
  background: #ffffff;
  font-size: 13px;
}

.site-footer p {
  margin: 0;
}

.reveal {
  opacity: 1;
  transform: translateY(0);
  transition:
    opacity 520ms ease,
    transform 520ms ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1120px) {
  .hero {
    grid-template-columns: minmax(0, 1fr);
    gap: 48px;
    min-height: auto;
  }

  .hero-portrait {
    justify-self: start;
  }

  .intro-grid {
    grid-template-columns: 1fr;
  }

  .intro-grid .section-kicker {
    grid-row: auto;
  }

  .info-panel {
    grid-column: auto;
  }

  .section-heading {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .info-panel,
  .field-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .info-row,
  .field-card {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .info-row:nth-last-child(-n + 1),
  .field-card:nth-last-child(-n + 1) {
    border-bottom: 0;
  }

  .product-layout,
  .media-feature {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 820px) {
  .site-header {
    height: 68px;
    padding: 0 20px;
  }

  .brand-text {
    display: none;
  }

  .nav-toggle {
    display: block;
  }

  .site-nav {
    position: absolute;
    top: 76px;
    left: 20px;
    right: 20px;
    display: none;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 8px;
    padding: 10px;
    color: var(--ink);
    background: rgba(255, 255, 255, 0.94);
    border-color: rgba(16, 19, 18, 0.12);
  }

  .site-header.is-open .site-nav {
    display: grid;
  }

  .hero {
    padding: 112px 24px 52px;
  }

  .hero h1 {
    font-size: 52px;
  }

  .hero-lead {
    font-size: 22px;
  }

  .hero-summary,
  .profile-article p,
  .media-feature p {
    font-size: 16px;
  }

  .hero-facts,
  .profile-article,
  .source-grid {
    grid-template-columns: 1fr;
  }

  .hero-facts div {
    padding-top: 16px;
  }

  .section {
    width: min(100% - 32px, 1180px);
    padding: 76px 0;
  }

  .section-heading h2 {
    font-size: 34px;
  }

  .timeline-item {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .info-panel,
  .field-grid {
    grid-template-columns: 1fr;
  }

  .signature-product {
    min-height: 330px;
  }

  .signature-product h3 {
    margin-top: 62px;
    font-size: 38px;
  }

  .contact-inner h2 {
    font-size: 32px;
  }

  .site-footer {
    flex-direction: column;
    padding: 24px;
  }
}

@media (max-width: 520px) {
  body {
    font-size: 15px;
  }

  .hero h1 {
    font-size: 40px;
  }

  .hero-actions,
  .contact-actions {
    flex-direction: column;
  }

  .button {
    width: 100%;
  }

  .site-nav {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .hero-portrait {
    width: 100%;
  }

  .hero-portrait::before {
    inset: -10px 10px 10px -10px;
  }
}