:root {
  color-scheme: light;
  --ink: #172225;
  --muted: #617174;
  --night: #11191c;
  --night-soft: #1b2a2b;
  --paper: #f7f9f7;
  --mint: #e4f2eb;
  --mint-strong: #14cbaa;
  --coral: #f37661;
  --line: #d5dfdb;
  font-family: "Noto Sans SC", "Microsoft YaHei", "PingFang SC", sans-serif;
  font-synthesis: none;
  scroll-behavior: smooth;
}

* { box-sizing: border-box; }
html { scroll-padding-top: 80px; }
body { margin: 0; background: var(--paper); color: var(--ink); }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, a { -webkit-tap-highlight-color: transparent; }
a:focus-visible { outline: 3px solid var(--coral); outline-offset: 4px; }
::selection { background: var(--mint-strong); color: var(--night); }

.skip-link {
  position: fixed;
  z-index: 100;
  top: -70px;
  left: 16px;
  padding: 10px 16px;
  background: #fff;
  color: #111;
}
.skip-link:focus { top: 12px; }

.site-header {
  position: relative;
  z-index: 5;
  height: 74px;
  background: var(--night);
  border-bottom: 1px solid #344345;
  color: #f9fcfa;
}
.header-inner, .section-inner { width: min(1200px, calc(100% - 48px)); margin-inline: auto; }
.header-inner { height: 100%; display: flex; align-items: center; justify-content: space-between; gap: 22px; }
.brand { display: inline-flex; align-items: center; gap: 10px; white-space: nowrap; font-size: 17px; font-weight: 500; }
.brand strong { font-weight: 800; }
.brand-mark {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border: 2px solid var(--coral);
  border-radius: 4px;
  color: var(--coral);
  font-family: Georgia, serif;
  font-size: 22px;
  font-weight: 700;
  line-height: 1;
}
.primary-nav { display: flex; align-items: center; gap: 34px; margin-left: auto; font-size: 13px; color: #c1d0cd; }
.primary-nav a:hover, .footer-main nav a:hover { color: var(--mint-strong); }
.header-download { display: inline-flex; align-items: center; gap: 18px; margin-left: 20px; padding: 11px 14px; border: 1px solid #617677; border-radius: 4px; font-size: 13px; font-weight: 700; }
.header-download:hover { border-color: var(--mint-strong); color: var(--mint-strong); }
.header-download span { color: var(--mint-strong); font-size: 18px; line-height: 1; }

.hero {
  position: relative;
  height: calc(100svh - 125px);
  min-height: 635px;
  max-height: 820px;
  overflow: hidden;
  background: var(--night);
  color: #fff;
  isolation: isolate;
}
.hero::before {
  content: "";
  position: absolute;
  z-index: -1;
  left: -6%;
  right: -6%;
  bottom: 0;
  height: 170px;
  background: #243c3a;
  transform: rotate(-3deg) translateY(105px);
}
.hero-copy { position: relative; z-index: 2; width: min(1200px, calc(100% - 48px)); margin: 0 auto; padding-top: 72px; }
.hero h1 { margin: 0; font-size: 76px; line-height: 1.1; font-weight: 800; letter-spacing: 0; }
.hero-lead { max-width: 710px; margin: 24px 0 0; font-size: 25px; line-height: 1.5; font-weight: 600; }
.hero-detail { max-width: 650px; margin: 15px 0 0; color: #bbcbca; font-size: 15px; line-height: 1.8; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.button { display: inline-flex; align-items: center; justify-content: space-between; gap: 28px; min-height: 48px; padding: 11px 18px; border-radius: 4px; font-size: 14px; font-weight: 750; transition: background-color 180ms, color 180ms, transform 180ms; }
.button:hover { transform: translateY(-2px); }
.button span { font-size: 19px; line-height: 1; }
.button-primary { background: var(--mint-strong); color: #08211d; }
.button-primary:hover { background: #61efd5; }
.button-quiet { border: 1px solid #536567; color: #e8f5f0; }
.button-quiet:hover { background: #28403e; }
.hero-screen-wrap {
  position: absolute;
  z-index: 1;
  left: 50%;
  bottom: -220px;
  width: min(1120px, calc(100% - 96px));
  aspect-ratio: 16 / 9;
  transform: translateX(-50%);
  border: 1px solid #789292;
  border-radius: 7px;
  background: #0c1217;
  box-shadow: 0 30px 90px #0009, 0 0 0 14px #223537;
}
.hero-screen { width: 100%; height: 100%; object-fit: cover; border-radius: 6px; }
.hero-edge-label { position: absolute; left: max(24px, calc((100% - 1200px) / 2)); bottom: 20px; color: #b6cfca; font: 11px/1.2 Consolas, monospace; }

.intro-band { padding: 112px 0 120px; background: var(--paper); }
.intro-layout { display: grid; grid-template-columns: minmax(0, .95fr) minmax(0, 1fr); gap: clamp(50px, 8vw, 130px); }
.section-overline { margin: 0 0 20px; color: #217b70; font-size: 12px; font-weight: 800; }
.section-heading h2, .showcase h2, .workflow h2, .download-section h2 { margin: 0; font-size: 43px; line-height: 1.28; font-weight: 800; letter-spacing: 0; }
.section-heading > p:last-child { max-width: 490px; margin-top: 28px; color: var(--muted); font-size: 16px; line-height: 1.9; }
.capability { padding: 22px 0 24px; border-top: 1px solid var(--line); }
.capability:last-child { border-bottom: 1px solid var(--line); }
.capability-heading { display: flex; align-items: center; gap: 18px; }
.capability-symbol { display: grid; place-items: center; flex: 0 0 31px; width: 31px; height: 31px; color: #ed705e; font-size: 24px; line-height: 1; }
.capability h3 { margin: 0; font-size: 21px; line-height: 1.45; }
.capability p { margin: 7px 0 0 49px; color: var(--muted); font-size: 14px; line-height: 1.8; }

.showcase { padding: 105px 0 118px; background: #eaf1ec; }
.showcase-head { display: flex; align-items: end; justify-content: space-between; gap: 40px; margin-bottom: 42px; }
.showcase-head > p { width: min(310px, 100%); margin: 0 0 5px; color: #526c66; font-size: 14px; line-height: 1.8; }
.sample-grid { display: grid; grid-template-columns: minmax(0, .42fr) minmax(0, .58fr); gap: 14px; }
.sample { min-width: 0; margin: 0; background: #fff; }
.sample img { width: 100%; height: 420px; object-fit: cover; }
.sample-source img { object-fit: contain; background: #fff; }
.sample figcaption { display: flex; justify-content: space-between; align-items: center; gap: 20px; min-height: 72px; padding: 16px 22px; border-top: 1px solid #e2e8e4; }
.sample figcaption span { color: #60746f; font-size: 12px; }
.sample figcaption strong { font-size: 14px; font-weight: 750; }

.workflow { padding: 112px 0 120px; background: #192727; color: #f8fbf8; }
.workflow .section-overline { color: #61deca; }
.workflow-header { margin-bottom: 66px; }
.workflow-steps { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 0; margin: 0; padding: 0; list-style: none; border-top: 1px solid #56716b; }
.workflow-steps li { min-width: 0; padding: 27px 24px 0; border-left: 1px solid #56716b; }
.workflow-steps li:first-child { padding-left: 0; border-left: 0; }
.step-index { color: var(--mint-strong); font: 14px/1 Consolas, monospace; }
.workflow-steps h3 { margin: 35px 0 8px; font-size: 20px; }
.workflow-steps p { max-width: 210px; margin: 0; color: #b9cbc6; font-size: 14px; line-height: 1.8; }

.download-section { padding: 105px 0 120px; background: #e4f0dc; }
.download-layout { display: flex; align-items: end; justify-content: space-between; gap: 70px; }
.download-section .section-overline { color: #3d7863; }
.download-description { max-width: 550px; margin: 24px 0 0; color: #496257; font-size: 15px; line-height: 1.85; }
.download-action { flex: 0 0 min(360px, 100%); padding-bottom: 5px; }
.release-state { display: inline-flex; align-items: center; gap: 9px; margin-bottom: 18px; color: #425b50; font-size: 13px; font-weight: 700; }
.state-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--coral); }
.button-download { width: 100%; min-height: 56px; background: #64776c; color: #f8fbf8; cursor: not-allowed; }
.button-download[aria-disabled="true"]:hover { transform: none; }
.button-download:not([aria-disabled="true"]) { background: var(--ink); cursor: pointer; }
.button-download:not([aria-disabled="true"]):hover { background: #2b4b43; }
.download-action > p { margin: 12px 0 0; color: #52685c; font-size: 12px; line-height: 1.7; }
.download-action .release-checksum { overflow-wrap: anywhere; font-family: Consolas, monospace; }

.site-footer { background: #11191c; color: #f3f9f5; }
.footer-main { display: flex; justify-content: space-between; gap: 40px; padding-top: 55px; padding-bottom: 60px; }
.footer-brand { font-size: 21px; font-weight: 800; }
.footer-main p { margin: 14px 0 0; color: #a8bbb5; font-size: 13px; }
.footer-main nav { display: flex; align-items: start; gap: 26px; color: #d0dcd6; font-size: 13px; }
.footer-bottom { display: flex; justify-content: space-between; gap: 18px; padding-top: 18px; padding-bottom: 26px; border-top: 1px solid #37433f; color: #93a7a0; font-size: 12px; }

@media (max-width: 900px) {
  .primary-nav { gap: 16px; }
  .header-download { margin-left: 0; }
  .hero h1 { font-size: 56px; }
  .hero-screen-wrap { width: calc(100% - 70px); bottom: -50px; }
  .intro-layout { gap: 45px; }
  .section-heading h2, .showcase h2, .workflow h2, .download-section h2 { font-size: 36px; }
  .sample img { height: 340px; }
}

@media (max-width: 680px) {
  .header-inner, .section-inner { width: min(100% - 36px, 1200px); }
  .site-header { height: 64px; }
  .brand { font-size: 14px; }
  .brand-mark { width: 28px; height: 28px; font-size: 19px; }
  .primary-nav { display: none; }
  .header-download { padding: 9px 10px; font-size: 12px; }
  .header-download span { display: none; }
  .hero { height: calc(100svh - 105px); min-height: 550px; max-height: 700px; }
  .hero-copy { width: calc(100% - 36px); padding-top: 55px; }
  .hero h1 { max-width: 330px; font-size: 42px; line-height: 1.12; }
  .hero-lead { max-width: 340px; margin-top: 17px; font-size: 19px; }
  .hero-detail { max-width: 335px; margin-top: 11px; font-size: 13px; line-height: 1.65; }
  .hero-actions { gap: 8px; margin-top: 20px; }
  .button { min-height: 44px; gap: 13px; padding: 10px 13px; font-size: 12px; }
  .hero-screen-wrap { width: calc(100% + 115px); bottom: -40px; box-shadow: 0 20px 60px #0008, 0 0 0 6px #223537; }
  .hero-edge-label { left: 18px; bottom: 14px; font-size: 9px; }
  .intro-band, .showcase, .workflow, .download-section { padding: 73px 0 78px; }
  .intro-layout, .sample-grid { grid-template-columns: 1fr; }
  .intro-layout { gap: 36px; }
  .section-heading h2, .showcase h2, .workflow h2, .download-section h2 { font-size: 32px; }
  .section-heading > p:last-child { margin-top: 18px; font-size: 14px; }
  .capability { padding: 17px 0 19px; }
  .capability h3 { font-size: 18px; }
  .showcase-head { display: block; margin-bottom: 26px; }
  .showcase-head > p { width: auto; max-width: 460px; margin-top: 18px; }
  .sample-grid { gap: 12px; }
  .sample img { height: auto; aspect-ratio: 4 / 3; }
  .sample-source img { aspect-ratio: 1 / 1; }
  .sample figcaption { min-height: 62px; padding: 13px 15px; }
  .workflow-header { margin-bottom: 38px; }
  .workflow-steps { grid-template-columns: repeat(2, minmax(0, 1fr)); row-gap: 30px; }
  .workflow-steps li { padding: 20px 12px 0; }
  .workflow-steps li:nth-child(odd) { padding-left: 0; border-left: 0; }
  .workflow-steps h3 { margin-top: 24px; font-size: 17px; }
  .workflow-steps p { font-size: 12px; }
  .download-layout { display: block; }
  .download-action { margin-top: 36px; }
  .footer-main { display: block; padding: 43px 0; }
  .footer-main nav { flex-wrap: wrap; margin-top: 28px; }
  .footer-bottom { flex-direction: column; gap: 6px; }
}

@media (max-width: 380px) {
  .brand { gap: 6px; font-size: 12px; }
  .hero h1 { font-size: 38px; }
  .hero-lead { font-size: 17px; }
  .button { font-size: 11px; }
  .hero-screen-wrap { bottom: -125px; }
}

@media (max-width: 380px) and (max-height: 700px) {
  .hero { height: calc(100svh - 90px); min-height: 480px; }
  .hero-screen-wrap { bottom: -180px; }
}

@media (prefers-reduced-motion: reduce) {
  :root { scroll-behavior: auto; }
  .button { transition: none; }
}