:root {
  --ink: #0d2231;
  --ink-soft: #1c3a4d;
  --paper: #f4f1ea;
  --paper-light: #fbfaf7;
  --line: rgba(13, 34, 49, 0.16);
  --blue: #3c7898;
  --blue-dark: #173f56;
  --orange: #d26735;
  --yellow: #e5b43e;
  --max: 1220px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Microsoft YaHei", "Noto Sans CJK SC", "Segoe UI", sans-serif;
  line-height: 1.6;
}
button, a { font: inherit; }
a { color: inherit; text-decoration: none; }
.section-wrap { width: min(calc(100% - 64px), var(--max)); margin: 0 auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 34px;
  min-height: 76px;
  padding: 12px max(32px, calc((100vw - var(--max)) / 2));
  color: var(--paper-light);
  background: var(--ink);
  border-bottom: 1px solid rgba(255,255,255,.14);
}
.brand { display: flex; align-items: center; gap: 12px; min-width: 270px; }
.brand-mark {
  display: grid; place-items: center; width: 38px; height: 38px;
  border: 1px solid #e5b43e; color: #e5b43e; font-family: Georgia, serif; font-size: 22px;
}
.brand strong, .brand small { display: block; }
.brand strong { font-size: 15px; letter-spacing: .04em; }
.brand small { color: #a9c1ca; font-size: 9px; letter-spacing: .18em; }
.main-nav { display: flex; align-items: center; gap: 26px; margin-left: auto; color: #c7d7da; font-size: 13px; }
.main-nav a { transition: color .2s ease; }
.main-nav a:hover { color: #e5b43e; }
.header-download { padding: 8px 15px; border: 1px solid #e5b43e; color: #f4d57e; font-size: 13px; }

.hero { display: grid; grid-template-columns: minmax(0, .9fr) minmax(420px, 1.1fr); gap: 68px; align-items: center; min-height: 650px; padding-top: 70px; padding-bottom: 80px; }
.eyebrow { margin: 0 0 14px; color: var(--orange); font-size: 11px; font-weight: 700; letter-spacing: .18em; }
h1, h2, h3, p { margin-top: 0; }
h1 { max-width: 640px; margin-bottom: 24px; font-family: Georgia, "Microsoft YaHei", serif; font-size: clamp(36px, 4vw, 64px); font-weight: 500; line-height: 1.14; letter-spacing: 0; }
h2 { margin-bottom: 12px; font-family: Georgia, "Microsoft YaHei", serif; font-size: clamp(28px, 3vw, 42px); font-weight: 500; line-height: 1.2; }
.hero-lede { max-width: 570px; margin-bottom: 34px; color: #48616b; font-size: 17px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 45px; padding: 0 19px; border: 1px solid var(--blue); cursor: pointer; transition: transform .2s ease, background .2s ease; }
.button:hover { transform: translateY(-2px); }
.button-primary { color: white; background: var(--blue-dark); }
.button-secondary { color: var(--ink); background: transparent; }
.hero-meta { display: flex; gap: 0; margin-top: 52px; color: #56707a; font-size: 12px; }
.hero-meta span { display: flex; align-items: baseline; gap: 9px; padding-right: 20px; margin-right: 20px; border-right: 1px solid rgba(13,34,49,.18); }
.hero-meta span:last-child { padding-right: 0; margin-right: 0; border-right: 0; }
.hero-meta b { display: inline; color: var(--orange); font-family: Georgia, serif; font-size: 23px; font-weight: 400; line-height: 1; }
.hero-meta em { font-style: normal; white-space: nowrap; }
.hero-media { position: relative; overflow: hidden; padding: 13px; background: var(--ink); box-shadow: 18px 18px 0 #d9d0c2; }
.hero-media video { display: block; width: 100%; aspect-ratio: 16 / 9; background: #09131b; object-fit: contain; }
.media-label { display: flex; align-items: center; gap: 8px; padding: 13px 4px 2px; color: #f3f1e8; font-size: 12px; letter-spacing: .04em; }
.media-time { margin-left: auto; color: #afc3c7; font-size: 10px; }
.live-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--yellow); }

.intro-band, .resources-band { color: var(--paper-light); background: var(--ink-soft); }
.intro-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 70px; align-items: center; padding-top: 50px; padding-bottom: 50px; }
.intro-grid h2 { color: #f6f2e8; }
.intro-grid p:last-child { max-width: 650px; margin: 0; color: #bfd0d2; font-size: 16px; }

.feature-section, .workflow-section, .showcase-section { padding-top: 100px; padding-bottom: 100px; }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 40px; margin-bottom: 38px; }
.section-heading > p { max-width: 420px; margin: 0; color: #63777d; font-size: 14px; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.feature-card { min-height: 270px; padding: 28px; border-top: 4px solid; }
.feature-blue { background: #d7e4e3; border-color: var(--blue); }
.feature-warm { background: #f0dfc6; border-color: var(--orange); }
.feature-dark { color: #f5f2e9; background: var(--ink); border-color: var(--yellow); }
.feature-index { display: block; margin-bottom: 48px; color: var(--orange); font-family: Georgia, serif; font-size: 18px; }
.feature-card h3 { margin-bottom: 10px; font-family: Georgia, "Microsoft YaHei", serif; font-size: 24px; font-weight: 500; }
.feature-card p { margin-bottom: 32px; color: inherit; opacity: .76; font-size: 14px; }
.feature-tag { font-size: 9px; letter-spacing: .13em; opacity: .55; }

.workflow-section { padding-top: 70px; border-top: 1px solid var(--line); }
.workflow-track { position: relative; display: grid; grid-template-columns: repeat(6, 1fr); gap: 12px; }
.workflow-line { position: absolute; top: 22px; right: 8%; left: 3%; height: 1px; background: #b4a68e; }
.workflow-step { position: relative; z-index: 1; display: flex; flex-direction: column; gap: 7px; }
.workflow-step span { display: grid; place-items: center; width: 45px; height: 45px; color: var(--paper-light); background: var(--orange); font-family: Georgia, serif; }
.workflow-step strong { font-family: Georgia, "Microsoft YaHei", serif; font-size: 16px; font-weight: 500; }
.workflow-step small { color: #6e7d7f; font-size: 11px; }

.showcase-section {
  width: min(calc(100% - 36px), calc(var(--max) + 64px));
  padding: 64px 32px 68px;
  background: #e6dfd3;
}
.showcase-section .section-heading { margin-bottom: 28px; }
.showcase-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.showcase-panel { min-width: 0; padding: 18px; background: var(--paper-light); }
.panel-topline { display: flex; justify-content: space-between; gap: 16px; margin-bottom: 12px; color: #61737a; font-size: 10px; letter-spacing: .1em; }
.showcase-panel p { margin: 14px 0 0; color: #64767a; font-size: 13px; }
.showcase-image { display: block; width: 100%; max-width: 100%; min-width: 0; aspect-ratio: 12 / 5; object-fit: contain; }
.interference-image { background: #050708; }
.temperature-image { background: #fff; }

.resources-band { background: var(--ink); }
.resources-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 90px; align-items: center; padding-top: 78px; padding-bottom: 78px; }
.resources-grid h2 { color: #f7f2e9; }
.resources-grid > div:first-child > p:last-child { max-width: 460px; color: #b9c9cb; }
.resource-list { border-top: 1px solid rgba(255,255,255,.22); }
.resource-item { display: grid; grid-template-columns: 50px 1fr 30px; gap: 14px; align-items: center; padding: 19px 0; border-bottom: 1px solid rgba(255,255,255,.22); color: #f6f2e9; }
.resource-icon { display: grid; place-items: center; width: 36px; height: 36px; border: 1px solid var(--yellow); color: var(--yellow); font-size: 11px; }
.resource-item strong, .resource-item small { display: block; }
.resource-item strong { font-size: 14px; font-weight: 500; }
.resource-item small { color: #9fb2b7; font-size: 11px; }
.resource-arrow { color: var(--yellow); font-size: 20px; }
.site-footer { display: flex; justify-content: space-between; gap: 20px; padding-top: 24px; padding-bottom: 24px; color: #6b7d80; font-size: 11px; }

.modal { position: fixed; inset: 0; z-index: 30; display: none; place-items: center; padding: 24px; }
.modal.is-open { display: grid; }
.modal-backdrop { position: absolute; inset: 0; background: rgba(7, 20, 28, .72); }
.modal-card { position: relative; width: min(100%, 500px); padding: 36px; color: var(--paper-light); background: var(--ink); border: 1px solid #5a8da3; box-shadow: 12px 12px 0 rgba(229,180,62,.5); }
.modal-card h2 { margin-bottom: 18px; }
.modal-card p:not(.eyebrow) { color: #c2d0d2; font-size: 14px; }
.modal-close { position: absolute; top: 12px; right: 15px; border: 0; color: #e6c86e; background: transparent; cursor: pointer; font-size: 28px; line-height: 1; }
.modal-status { display: flex; align-items: center; gap: 8px; margin: 22px 0; color: #f4d57e; font-size: 13px; }
.modal-status span { width: 8px; height: 8px; border-radius: 50%; background: var(--orange); }
.modal-status.is-ready { color: #9bd6b2; }
.modal-status.is-ready span { background: #63c98a; }
.modal-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.modal-actions .button { flex: 1 1 210px; text-align: center; }
.modal-card .button-secondary { color: #f6f2e9; border-color: #e5b43e; }

/* 浏览器缩放较小时会产生超宽 CSS 视口，扩大内容画布，避免页面缩成中央小条。 */
@media (min-width: 2400px) {
  :root { --max: min(72vw, 3000px); }
  .site-header { min-height: 88px; }
  .brand strong { font-size: 18px; }
  .brand small, .feature-tag { font-size: 11px; }
  .main-nav, .header-download { font-size: 16px; }
  .eyebrow { font-size: 14px; }
  h1 { max-width: 820px; font-size: 76px; }
  h2 { font-size: 52px; }
  .hero { grid-template-columns: minmax(0, .92fr) minmax(620px, 1.08fr); min-height: 780px; }
  .hero-lede { max-width: 760px; font-size: 21px; }
  .button { min-height: 54px; padding: 0 24px; font-size: 17px; }
  .hero-meta, .media-label { font-size: 15px; }
  .media-time, .panel-topline { font-size: 12px; }
  .intro-grid p:last-child { max-width: 860px; font-size: 20px; }
  .section-heading > p { max-width: 600px; font-size: 18px; }
  .feature-card { min-height: 330px; padding: 36px; }
  .feature-index { font-size: 22px; }
  .feature-card h3 { font-size: 30px; }
  .feature-card p { font-size: 18px; }
  .workflow-step strong { font-size: 20px; }
  .workflow-step small { font-size: 14px; }
  .showcase-panel { padding: 24px; }
  .showcase-panel p { font-size: 16px; }
  .resource-item strong { font-size: 18px; }
  .resource-item small, .site-footer { font-size: 14px; }
}

@media (max-width: 900px) {
  .site-header { gap: 16px; padding: 12px 20px; }
  .brand { min-width: auto; }
  .main-nav { display: none; }
  .header-download { margin-left: auto; }
  .section-wrap { width: min(calc(100% - 36px), var(--max)); }
  .hero { grid-template-columns: 1fr; gap: 44px; padding-top: 48px; }
  .hero-media { box-shadow: 10px 10px 0 #d9d0c2; }
  .intro-grid, .resources-grid { grid-template-columns: 1fr; gap: 24px; }
  .feature-grid, .showcase-grid { grid-template-columns: 1fr; }
  .workflow-track { grid-template-columns: repeat(3, 1fr); row-gap: 30px; }
  .workflow-line { display: none; }
}
@media (max-width: 560px) {
  .brand strong { font-size: 12px; }
  .brand small { display: none; }
  .header-download { padding: 7px 9px; font-size: 11px; }
  h1 { font-size: 34px; }
  .hero-meta { gap: 0; flex-wrap: wrap; row-gap: 12px; }
  .section-heading { display: block; }
  .section-heading > p { margin-top: 18px; }
  .showcase-section { width: calc(100% - 24px); padding: 46px 14px 50px; }
  .showcase-section .section-heading { margin-bottom: 24px; }
  .showcase-panel { padding: 14px; }
  .panel-topline { gap: 10px; font-size: 9px; }
  .workflow-track { grid-template-columns: repeat(2, 1fr); }
  .site-footer { display: block; }
  .site-footer span { display: block; margin-bottom: 6px; }
}