:root {
  --bg: #efe2d1;
  --bg-deep: #0d1518;
  --sand: #d9b994;
  --ink: #102022;
  --muted: rgba(16, 32, 34, 0.72);
  --line: rgba(16, 32, 34, 0.12);
  --accent: #bc5b32;
  --accent-soft: rgba(188, 91, 50, 0.12);
  --panel: rgba(255, 249, 241, 0.72);
  --panel-strong: rgba(255, 248, 239, 0.9);
  --shadow: 0 24px 80px rgba(16, 32, 34, 0.12);
  --radius-lg: 32px;
  --radius-md: 20px;
  --content-width: min(1180px, calc(100vw - 48px));
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at top left, rgba(255, 245, 232, 0.9), transparent 28%),
    linear-gradient(180deg, #f5e8d8 0%, #ecd7bf 32%, #f5ecdf 64%, #f0e4d6 100%);
  color: var(--ink);
  font-family: "Alibaba PuHuiTi 3.0", "HarmonyOS Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(16, 32, 34, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(16, 32, 34, 0.035) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.3), rgba(0, 0, 0, 0.75));
}

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

.site-shell {
  position: relative;
  overflow: hidden;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: var(--content-width);
  margin: 0 auto;
  padding: 20px 0;
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  flex-direction: column;
  gap: 2px;
}

.brand-mark {
  font-size: 0.72rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: rgba(16, 32, 34, 0.55);
}

.brand-name {
  font-family: "Source Han Serif SC", "Noto Serif CJK SC", "Songti SC", serif;
  font-size: 1.32rem;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.topnav {
  display: inline-flex;
  gap: 24px;
  font-size: 0.92rem;
  color: rgba(16, 32, 34, 0.72);
}

.topnav a {
  position: relative;
}

.topnav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 100%;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 220ms ease;
}

.topnav a:hover::after {
  transform: scaleX(1);
}

main {
  width: var(--content-width);
  margin: 0 auto;
  padding-bottom: 80px;
}

section {
  position: relative;
}

.hero {
  display: grid;
  grid-template-columns: 1.08fr 0.92fr;
  gap: 40px;
  align-items: center;
  min-height: calc(100svh - 84px);
  padding: 28px 0 72px;
}

.eyebrow,
.section-kicker,
.launch-status {
  margin: 0 0 18px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: rgba(16, 32, 34, 0.56);
}

.hero h1,
.section-intro h2,
.fit-copy h2,
.launch-copy h2 {
  margin: 0;
  font-family: "Source Han Serif SC", "Noto Serif CJK SC", "Songti SC", serif;
  font-weight: 600;
  line-height: 1.04;
  letter-spacing: -0.02em;
}

.hero h1 {
  font-size: clamp(3.4rem, 8vw, 6.4rem);
  max-width: 11ch;
}

.hero-lead,
.section-lead,
.fit-item p,
.launch-copy p,
.launch-card p,
.statement-row p,
.method-panel p,
.proof-columns li {
  color: var(--muted);
  line-height: 1.8;
}

.hero-lead {
  max-width: 33rem;
  margin: 28px 0 0;
  font-size: 1.02rem;
}

.hero-actions {
  display: flex;
  gap: 14px;
  margin-top: 30px;
  flex-wrap: wrap;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 0 24px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 0.95rem;
  font-weight: 700;
  transition: transform 220ms ease, background-color 220ms ease, border-color 220ms ease;
}

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

.button-solid {
  background: var(--ink);
  color: #fff7f0;
  box-shadow: 0 18px 32px rgba(16, 32, 34, 0.18);
}

.button-ghost {
  border-color: rgba(16, 32, 34, 0.18);
  background: rgba(255, 248, 239, 0.5);
}

.signal-list {
  display: grid;
  gap: 10px;
  margin: 34px 0 0;
  padding: 0;
  list-style: none;
}

.signal-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  color: rgba(16, 32, 34, 0.82);
  font-size: 0.94rem;
}

.signal-list li::before {
  content: "";
  width: 32px;
  height: 1px;
  background: rgba(16, 32, 34, 0.26);
}

.hero-visual {
  position: relative;
  min-height: 640px;
}

.signal-stage {
  position: relative;
  height: 100%;
  min-height: 640px;
  border-radius: 40px;
  background:
    linear-gradient(180deg, rgba(14, 22, 25, 0.96), rgba(16, 23, 27, 0.94)),
    linear-gradient(120deg, rgba(255, 255, 255, 0.08), transparent);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.signal-grid,
.signal-stage::before,
.signal-stage::after {
  position: absolute;
  inset: 0;
  content: "";
}

.signal-grid {
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.08) 1px, transparent 1px);
  background-size: 54px 54px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.65), rgba(0, 0, 0, 1));
}

.signal-stage::before {
  inset: 12% 18% auto auto;
  width: 240px;
  height: 240px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(188, 91, 50, 0.38), transparent 72%);
  filter: blur(10px);
}

.signal-stage::after {
  inset: auto auto 8% 6%;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(217, 185, 148, 0.2), transparent 72%);
  filter: blur(8px);
}

.orb {
  position: absolute;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 50%;
}

.orb-one {
  inset: 16% 15% 14% 18%;
}

.orb-two {
  inset: 8% 26% 26% 10%;
}

.orb-three {
  inset: 22% 8% 10% 28%;
}

.signal-core {
  position: absolute;
  inset: 50% auto auto 50%;
  display: flex;
  flex-direction: column;
  gap: 10px;
  width: 220px;
  transform: translate(-50%, -50%);
  text-align: center;
}

.core-label {
  color: rgba(255, 255, 255, 0.68);
  letter-spacing: 0.24em;
  text-transform: uppercase;
  font-size: 0.72rem;
}

.signal-core strong {
  font-family: "Source Han Serif SC", "Noto Serif CJK SC", "Songti SC", serif;
  font-size: 3rem;
  font-weight: 600;
  line-height: 1.08;
  color: #fef5ea;
}

.signal-node {
  position: absolute;
  display: grid;
  gap: 8px;
  width: 170px;
  padding: 18px 20px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.04);
  backdrop-filter: blur(14px);
  color: #f6ebde;
}

.signal-node span {
  font-size: 0.8rem;
  letter-spacing: 0.18em;
  color: rgba(255, 255, 255, 0.52);
}

.signal-node p {
  margin: 0;
  font-family: "Source Han Serif SC", "Noto Serif CJK SC", "Songti SC", serif;
  font-size: 1.08rem;
}

.node-a {
  top: 10%;
  left: 7%;
}

.node-b {
  top: 14%;
  right: 7%;
}

.node-c {
  bottom: 12%;
  left: 10%;
}

.node-d {
  right: 10%;
  bottom: 16%;
}

.statement,
.method,
.fit,
.proof,
.launch {
  padding: 72px 0;
}

.section-intro {
  max-width: 740px;
}

.section-intro h2,
.fit-copy h2,
.launch-copy h2 {
  font-size: clamp(2.2rem, 5vw, 4rem);
  max-width: 13ch;
}

.section-lead {
  margin-top: 18px;
  max-width: 40rem;
}

.statement-lines {
  display: grid;
  gap: 18px;
  margin-top: 28px;
}

.statement-row {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 28px;
  padding: 22px 0;
  border-top: 1px solid var(--line);
}

.statement-row:last-child {
  border-bottom: 1px solid var(--line);
}

.statement-row span,
.proof-label {
  font-size: 0.84rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(16, 32, 34, 0.48);
}

.statement-row p {
  margin: 0;
  font-size: 1.14rem;
  color: rgba(16, 32, 34, 0.9);
}

.method-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
  margin-top: 34px;
}

.method-panel {
  min-height: 220px;
  padding: 28px;
  border: 1px solid rgba(16, 32, 34, 0.1);
  border-radius: var(--radius-md);
  background: linear-gradient(180deg, rgba(255, 251, 246, 0.92), rgba(253, 244, 235, 0.7));
  box-shadow: 0 18px 50px rgba(16, 32, 34, 0.06);
}

.method-index {
  display: inline-block;
  margin-bottom: 18px;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.18em;
  color: var(--accent);
}

.method-panel h3,
.fit-item h3 {
  margin: 0 0 12px;
  font-size: 1.28rem;
}

.method-panel p,
.fit-item p {
  margin: 0;
}

.fit {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 32px;
  align-items: start;
}

.fit-list {
  display: grid;
  gap: 18px;
}

.fit-item {
  padding: 22px 24px 24px;
  border-top: 1px solid rgba(16, 32, 34, 0.12);
}

.fit-item:last-child {
  border-bottom: 1px solid rgba(16, 32, 34, 0.12);
}

.proof {
  padding-bottom: 88px;
}

.proof-columns {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
  margin-top: 30px;
}

.proof-columns > div {
  padding: 26px;
  border-radius: 24px;
  background: rgba(255, 250, 243, 0.72);
  border: 1px solid rgba(16, 32, 34, 0.08);
}

.proof-columns ul {
  display: grid;
  gap: 12px;
  margin: 18px 0 0;
  padding-left: 18px;
}

.launch {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 30px;
  padding-bottom: 24px;
}

.launch-card {
  align-self: stretch;
  padding: 32px;
  border-radius: 28px;
  background: linear-gradient(180deg, rgba(16, 32, 34, 0.96), rgba(20, 26, 30, 0.92));
  box-shadow: 0 30px 80px rgba(16, 32, 34, 0.18);
  color: #fff6ed;
}

.launch-card strong {
  display: block;
  margin-bottom: 18px;
  font-family: "Source Han Serif SC", "Noto Serif CJK SC", "Songti SC", serif;
  font-size: 2rem;
  font-weight: 600;
  line-height: 1.2;
}

.launch-card p {
  margin: 0 0 24px;
  color: rgba(255, 246, 237, 0.78);
}

.js .reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 720ms ease, transform 720ms ease;
}

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

@media (max-width: 1080px) {
  .hero,
  .fit,
  .launch,
  .method-grid,
  .proof-columns {
    grid-template-columns: 1fr 1fr;
  }

  .hero {
    min-height: auto;
    padding-top: 20px;
  }

  .hero-visual {
    min-height: 520px;
  }

  .signal-stage {
    min-height: 520px;
  }
}

@media (max-width: 860px) {
  :root {
    --content-width: min(100vw - 28px, 1180px);
  }

  .topbar {
    padding: 16px 0;
  }

  .topnav {
    display: none;
  }

  .hero,
  .fit,
  .launch,
  .method-grid,
  .proof-columns {
    grid-template-columns: 1fr;
  }

  .hero h1 {
    max-width: 9ch;
  }

  .hero-visual,
  .signal-stage {
    min-height: 460px;
  }

  .signal-node {
    width: 142px;
    padding: 14px 16px;
  }

  .signal-core strong {
    font-size: 2.2rem;
  }

  .statement-row {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .statement-row p {
    font-size: 1rem;
  }
}

@media (max-width: 560px) {
  .hero {
    padding-bottom: 40px;
  }

  .hero h1 {
    font-size: clamp(2.7rem, 16vw, 4.1rem);
  }

  .hero-visual,
  .signal-stage {
    min-height: 400px;
  }

  .signal-core {
    width: 160px;
  }

  .signal-node {
    width: 116px;
    border-radius: 18px;
  }

  .signal-node p {
    font-size: 0.92rem;
  }

  .node-a {
    top: 9%;
    left: 4%;
  }

  .node-b {
    top: 8%;
    right: 4%;
  }

  .node-c {
    bottom: 10%;
    left: 4%;
  }

  .node-d {
    right: 4%;
    bottom: 12%;
  }

  .launch-card {
    padding: 24px;
  }

  .launch-card strong {
    font-size: 1.62rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .js .reveal,
  .js .reveal.is-visible,
  .button {
    transition: none;
    transform: none;
    opacity: 1;
  }
}