@font-face {
  font-family: "AlibabaPuHuiTi";
  src: url("https://cdn.jsdelivr.net/npm/@tslsmart/font-puhuiti@1.0.0/assets/alibaba-puhuiti-regular.ttf") format("truetype");
  font-weight: 400;
  font-display: swap;
}
@font-face {
  font-family: "AlibabaPuHuiTi";
  src: url("https://cdn.jsdelivr.net/npm/@tslsmart/font-puhuiti@1.0.0/assets/alibaba-puhuiti-medium.ttf") format("truetype");
  font-weight: 600 800;
  font-display: swap;
}
:root {
  --ink: #161817;
  --muted: #66706a;
  --paper: #f6f3ed;
  --panel: #fffdf8;
  --line: rgba(22, 24, 23, .12);
  --green: #6f826d;
  --gold: #b88b4a;
  --blue: #446f8c;
  --charcoal: #242724;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: AlibabaPuHuiTi, "Alibaba PuHuiTi", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  letter-spacing: 0;
}
a { color: inherit; text-decoration: none; }
.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 14px clamp(18px, 4vw, 54px);
  background: rgba(246, 243, 237, .82);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(18px);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: 250px;
  font-weight: 700;
  font-size: 15px;
}
.brand-mark {
  display: grid;
  width: 36px;
  height: 36px;
  place-items: center;
  color: #fff;
  background: var(--charcoal);
  border-radius: 8px;
  font-size: 13px;
}
.main-nav {
  display: flex;
  flex: 1;
  justify-content: center;
  gap: 4px;
}
.main-nav a,
.lang-toggle {
  border: 1px solid transparent;
  border-radius: 8px;
  padding: 10px 12px;
  color: var(--muted);
  font: inherit;
  font-size: 14px;
  background: transparent;
}
.main-nav a.active,
.main-nav a:hover,
.lang-toggle:hover {
  color: var(--ink);
  border-color: var(--line);
  background: rgba(255, 255, 255, .55);
}
.lang-toggle { cursor: pointer; }
.hero,
.page-hero,
.map-section,
.content-band,
.process-strip,
.site-footer {
  padding-inline: clamp(22px, 6vw, 86px);
}
.home-hero {
  min-height: 680px;
  display: grid;
  grid-template-columns: minmax(0, .98fr) minmax(320px, .82fr);
  gap: clamp(24px, 5vw, 72px);
  align-items: center;
  background:
    linear-gradient(120deg, rgba(255,255,255,.92), rgba(255,255,255,.28)),
    radial-gradient(circle at 74% 26%, rgba(184,139,74,.22), transparent 34%),
    radial-gradient(circle at 28% 78%, rgba(68,111,140,.14), transparent 30%);
}
.eyebrow,
.section-kicker {
  margin: 0 0 14px;
  color: var(--green);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0;
}
h1,
h2,
h3,
p { margin-top: 0; }
h1 {
  max-width: 820px;
  margin-bottom: 22px;
  font-size: clamp(42px, 5.8vw, 78px);
  line-height: 1.02;
  letter-spacing: 0;
}
:lang(en) h1 {
  font-size: clamp(38px, 4.8vw, 64px);
  line-height: 1.06;
}
h2 {
  max-width: 760px;
  margin-bottom: 22px;
  font-size: clamp(28px, 3.8vw, 48px);
  line-height: 1.08;
  letter-spacing: 0;
}
h3 {
  margin-bottom: 10px;
  font-size: 22px;
  line-height: 1.16;
}
.lead {
  max-width: 720px;
  color: #3d443f;
  font-size: clamp(16px, 1.45vw, 19px);
  line-height: 1.78;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}
.primary-btn,
.ghost-btn,
.site-footer a {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  padding: 0 18px;
  font-weight: 700;
}
.primary-btn {
  color: #fff;
  background: var(--charcoal);
}
.ghost-btn,
.site-footer a {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, .58);
}
.hero-panel,
.page-visual {
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, .72);
  border-radius: 8px;
  background: rgba(255, 253, 248, .74);
  box-shadow: 0 26px 70px rgba(30, 27, 20, .13);
}
.hero-panel {
  min-height: 390px;
  padding: 24px;
}
.orbital {
  position: relative;
  display: grid;
  min-height: 238px;
  place-items: center;
}
.orbital span {
  display: grid;
  width: 104px;
  height: 104px;
  place-items: center;
  color: white;
  background: var(--charcoal);
  border-radius: 50%;
  font-size: 34px;
  font-weight: 800;
}
.orbital i {
  position: absolute;
  border: 1px solid rgba(22, 24, 23, .18);
  border-radius: 50%;
  animation: spin 14s linear infinite;
}
.orbital i:nth-child(2) { width: 180px; height: 180px; }
.orbital i:nth-child(3) { width: 230px; height: 230px; animation-duration: 21s; }
.orbital i:nth-child(4) { width: 286px; height: 286px; animation-duration: 28s; }
.orbital i::after {
  content: "";
  position: absolute;
  top: 18px;
  left: 50%;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--gold);
}
.hero-panel dl {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin: 12px 0 0;
}
.hero-panel div {
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
}
dt { color: var(--green); font-weight: 800; }
dd { margin: 4px 0 0; color: var(--muted); }
.map-section {
  padding-top: clamp(44px, 6vw, 84px);
  padding-bottom: clamp(44px, 6vw, 84px);
}
.architecture,
.card-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}
.arch-column,
.map-card,
.process-step {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 253, 248, .78);
  transition: transform .28s ease, border-color .28s ease, box-shadow .28s ease;
}
.arch-column:hover,
.map-card:hover {
  transform: translateY(-4px);
  border-color: rgba(111, 130, 109, .45);
  box-shadow: 0 20px 44px rgba(30, 27, 20, .1);
}
.arch-column { padding: 18px; }
.arch-column > a:first-child {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
  font-size: 18px;
  font-weight: 800;
}
.arch-column span,
.check-item span,
.process-step span {
  display: inline-grid;
  min-width: 32px;
  height: 32px;
  place-items: center;
  border-radius: 8px;
  color: #fff;
  background: var(--green);
  font-size: 12px;
  font-weight: 800;
}
.sub-link {
  display: block;
  margin: 8px 0;
  color: #3f4842;
  font-size: 14px;
  font-weight: 600;
}
.arch-column p,
.map-card p,
.process-step p,
.content-grid p,
.page-visual p,
.site-footer p {
  color: var(--muted);
  line-height: 1.68;
}
.content-band {
  padding-top: clamp(54px, 7vw, 94px);
  padding-bottom: clamp(54px, 7vw, 94px);
  background: #fffdf8;
  border-block: 1px solid var(--line);
}
.content-band.dark {
  color: #fff;
  background: var(--charcoal);
}
.content-band.dark p,
.content-band.dark .check-item { color: rgba(255,255,255,.76); }
.content-grid {
  display: grid;
  grid-template-columns: minmax(0, .9fr) minmax(280px, 1.1fr);
  gap: clamp(22px, 5vw, 70px);
  align-items: start;
}
.check-list {
  display: grid;
  gap: 12px;
}
.check-item {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 58px;
  border-bottom: 1px solid var(--line);
  color: #2e3530;
  font-weight: 700;
}
.page-hero {
  padding-top: 44px;
  padding-bottom: 38px;
}
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 36px;
  color: var(--muted);
  font-size: 14px;
}
.breadcrumbs a:hover { color: var(--ink); }
.page-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: clamp(24px, 5vw, 70px);
  align-items: end;
}
.page-visual {
  min-height: 250px;
  padding: 26px;
}
.page-visual span {
  display: block;
  margin-bottom: 38px;
  color: rgba(22,24,23,.1);
  font-size: 76px;
  font-weight: 800;
  line-height: .9;
}
.page-visual strong {
  display: block;
  margin-bottom: 10px;
  font-size: 24px;
}
.page-shell {
  display: grid;
  grid-template-columns: 230px minmax(0, 1fr);
  gap: clamp(24px, 4vw, 54px);
  padding: 0 clamp(22px, 6vw, 86px) clamp(54px, 8vw, 110px);
}
.side-nav {
  position: sticky;
  top: 82px;
  align-self: start;
  border-left: 1px solid var(--line);
  padding-left: 16px;
}
.side-nav p {
  margin-bottom: 12px;
  color: var(--green);
  font-size: 13px;
  font-weight: 800;
}
.side-nav a {
  display: block;
  border-radius: 8px;
  padding: 10px 12px;
  color: var(--muted);
}
.side-nav a.active,
.side-nav a:hover {
  color: var(--ink);
  background: rgba(255,255,255,.6);
}
.inner {
  padding-inline: 0;
}
.map-card {
  min-height: 210px;
  padding: 22px;
}
.map-card small {
  display: block;
  margin-bottom: 18px;
  color: var(--green);
  font-weight: 800;
}
.map-card strong {
  display: block;
  margin-bottom: 12px;
  font-size: 21px;
  line-height: 1.16;
}
.map-card span {
  display: inline-flex;
  margin-top: 10px;
  color: var(--blue);
  font-weight: 800;
}
.compact .map-card { min-height: 190px; }
.process-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  padding-top: 44px;
  padding-bottom: 44px;
}
.process-step { padding: 20px; }
.process-step span { margin-bottom: 34px; }
.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding-top: 34px;
  padding-bottom: 34px;
  border-top: 1px solid var(--line);
}
.reveal {
  opacity: 1;
  transform: translateY(18px);
  animation: reveal .72s ease forwards;
  animation-delay: var(--delay, 0ms);
}
@keyframes reveal {
  to { opacity: 1; transform: translateY(0); }
}
@keyframes spin {
  to { transform: rotate(360deg); }
}
@media (max-width: 980px) {
  .topbar {
    position: relative;
    flex-wrap: wrap;
  }
  .brand { min-width: 0; flex: 1; }
  .main-nav {
    order: 3;
    justify-content: flex-start;
    overflow-x: auto;
    width: 100%;
    padding-bottom: 4px;
  }
  .home-hero,
  .page-hero-grid,
  .content-grid,
  .page-shell {
    grid-template-columns: 1fr;
  }
  .architecture,
  .card-grid,
  .process-strip {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .side-nav {
    position: relative;
    top: auto;
    display: flex;
    overflow-x: auto;
    border-left: 0;
    border-bottom: 1px solid var(--line);
    padding: 0 0 12px;
  }
  .side-nav p { display: none; }
  .side-nav a { white-space: nowrap; }
}
@media (max-width: 640px) {
  .hero, .page-hero, .map-section, .content-band, .process-strip, .site-footer {
    padding-inline: 18px;
  }
  h1 {
    font-size: clamp(34px, 11vw, 50px);
    line-height: 1.04;
  }
  .lead { font-size: 16px; }
  .architecture,
  .card-grid,
  .process-strip {
    grid-template-columns: 1fr;
  }
  .hero-panel { min-height: 330px; }
  .orbital { min-height: 210px; }
  .orbital i:nth-child(4) { width: 260px; height: 260px; }
  .site-footer { align-items: flex-start; flex-direction: column; }
}