@font-face {
  font-family: "CCWA Inter";
  src: url("fonts/Inter.ttf") format("truetype");
  font-display: swap;
  font-style: normal;
  font-weight: 100 900;
}

@font-face {
  font-family: "CCWA Mono";
  src: url("fonts/JetBrainsMono.ttf") format("truetype");
  font-display: swap;
  font-style: normal;
  font-weight: 100 800;
}

:root {
  color-scheme: dark;
  --ink: #111116;
  --ink-deep: #0b0b0f;
  --panel: #1b1b23;
  --panel-raised: #22222c;
  --panel-soft: #17171e;
  --line: #34343f;
  --line-soft: #282831;
  --paper: #f4f1e9;
  --text: #eeece7;
  --muted: #aaa7b1;
  --faint: #7f7c88;
  --gold: #e8ae37;
  --gold-soft: #f3c35f;
  --cyan: #4bc0cc;
  --violet: #ae7de0;
  --red: #ff7278;
  --green: #5bd58b;
  --content: 1180px;
  --radius: 18px;
  --shadow: 0 24px 70px rgb(0 0 0 / 0.35);
  --display: "CCWA Inter", Inter, ui-sans-serif, system-ui, sans-serif;
  --body: "CCWA Inter", Inter, "Noto Sans SC", "Microsoft YaHei", ui-sans-serif, system-ui, sans-serif;
  --mono: "CCWA Mono", "SFMono-Regular", Consolas, monospace;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background: var(--ink);
}

body {
  margin: 0;
  min-width: 320px;
  overflow-x: hidden;
  background:
    radial-gradient(circle at 84% 4%, rgb(75 192 204 / 0.08), transparent 30rem),
    radial-gradient(circle at 10% 22%, rgb(232 174 55 / 0.07), transparent 27rem),
    var(--ink);
  color: var(--text);
  font-family: var(--body);
  font-size: 16px;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
}

a {
  color: inherit;
}

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

button,
a {
  -webkit-tap-highlight-color: transparent;
}

:focus-visible {
  outline: 3px solid var(--cyan);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 12px;
  left: 12px;
  padding: 10px 14px;
  transform: translateY(-150%);
  border-radius: 8px;
  background: var(--paper);
  color: var(--ink);
  font-weight: 800;
  transition: transform 160ms ease;
}

.skip-link:focus {
  transform: translateY(0);
}

.shell {
  width: min(calc(100% - 40px), var(--content));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  z-index: 40;
  top: 0;
  border-bottom: 1px solid rgb(255 255 255 / 0.07);
  background: rgb(17 17 22 / 0.84);
  backdrop-filter: blur(18px);
}

.nav {
  display: flex;
  min-height: 74px;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  color: var(--paper);
  font-family: var(--display);
  font-size: 15px;
  font-weight: 830;
  letter-spacing: -0.02em;
  text-decoration: none;
}

.brand-mark {
  position: relative;
  width: 28px;
  height: 28px;
  border: 1px solid rgb(232 174 55 / 0.58);
  border-radius: 8px;
  background: rgb(232 174 55 / 0.09);
}

.brand-mark::before,
.brand-mark::after {
  position: absolute;
  content: "";
}

.brand-mark::before {
  top: 7px;
  right: 5px;
  left: 5px;
  height: 2px;
  background: var(--gold);
  box-shadow: 0 6px 0 var(--cyan), 0 12px 0 var(--violet);
}

.brand-mark::after {
  top: 5px;
  left: 7px;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--gold-soft);
  box-shadow: 8px 6px 0 var(--cyan), 3px 12px 0 var(--violet);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-links a {
  color: var(--muted);
  font-size: 14px;
  font-weight: 660;
  text-decoration: none;
  transition: color 150ms ease;
}

.nav-links a:hover {
  color: var(--paper);
}

.nav-links .lang-link {
  padding: 7px 11px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--paper);
  font-family: var(--mono);
  font-size: 12px;
}

.hero {
  position: relative;
  padding: 92px 0 58px;
}

.hero::before {
  position: absolute;
  z-index: -1;
  top: 0;
  left: 50%;
  width: min(100%, 1440px);
  height: 100%;
  transform: translateX(-50%);
  background-image:
    linear-gradient(rgb(255 255 255 / 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgb(255 255 255 / 0.025) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: linear-gradient(to bottom, black, transparent 92%);
  content: "";
}

.hero-grid {
  display: grid;
  align-items: center;
  gap: clamp(46px, 7vw, 92px);
  grid-template-columns: minmax(0, 0.98fr) minmax(420px, 0.86fr);
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 22px;
  color: var(--gold-soft);
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.eyebrow::before {
  width: 24px;
  height: 1px;
  background: var(--gold);
  content: "";
}

.hero h1 {
  max-width: 760px;
  margin: 0;
  color: var(--paper);
  font-family: var(--display);
  font-size: clamp(47px, 6.2vw, 82px);
  font-weight: 830;
  letter-spacing: -0.062em;
  line-height: 0.99;
}

.hero h1 .wire-word {
  position: relative;
  display: inline-block;
  color: var(--gold-soft);
}

.hero h1 .wire-word::after {
  position: absolute;
  right: 0;
  bottom: -8px;
  left: 4px;
  height: 2px;
  background: repeating-linear-gradient(90deg, var(--gold) 0 7px, transparent 7px 12px);
  content: "";
}

.hero-copy {
  max-width: 670px;
  margin: 28px 0 0;
  color: var(--muted);
  font-size: clamp(17px, 1.7vw, 20px);
  line-height: 1.65;
}

.hero-copy strong {
  color: var(--paper);
  font-weight: 720;
}

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

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 0 19px;
  border: 1px solid var(--line);
  border-radius: 11px;
  color: var(--paper);
  font-size: 14px;
  font-weight: 780;
  text-decoration: none;
  transition: transform 150ms ease, border-color 150ms ease, background 150ms ease;
}

.button:hover {
  transform: translateY(-2px);
  border-color: #5a5966;
  background: rgb(255 255 255 / 0.04);
}

.button.primary {
  border-color: var(--gold);
  background: var(--gold);
  color: #18140b;
  box-shadow: 0 12px 34px rgb(232 174 55 / 0.19);
}

.button.primary:hover {
  background: var(--gold-soft);
}

.button .arrow {
  font-family: var(--mono);
  font-size: 16px;
}

.trust-line {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin: 24px 0 0;
  padding: 0;
  color: var(--faint);
  font-family: var(--mono);
  font-size: 11px;
  list-style: none;
}

.trust-line li {
  display: flex;
  align-items: center;
  gap: 7px;
}

.trust-line li::before {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 4px rgb(91 213 139 / 0.08);
  content: "";
}

.wire-stage {
  position: relative;
  min-height: 470px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: linear-gradient(145deg, #1a1a22, #121218 70%);
  box-shadow: var(--shadow);
}

.wire-stage::before {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgb(255 255 255 / 0.026) 1px, transparent 1px),
    linear-gradient(90deg, rgb(255 255 255 / 0.026) 1px, transparent 1px);
  background-size: 28px 28px;
  content: "";
}

.stage-bar {
  position: relative;
  z-index: 2;
  display: flex;
  height: 52px;
  align-items: center;
  justify-content: space-between;
  padding: 0 17px;
  border-bottom: 1px solid var(--line-soft);
  background: rgb(13 13 18 / 0.72);
}

.stage-dots {
  display: flex;
  gap: 6px;
}

.stage-dots span {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--line);
}

.stage-dots span:first-child {
  background: var(--red);
}

.stage-dots span:nth-child(2) {
  background: var(--gold);
}

.stage-dots span:last-child {
  background: var(--green);
}

.stage-title {
  color: var(--faint);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.route {
  position: absolute;
  z-index: 2;
  top: 118px;
  right: 38px;
  left: 38px;
  height: 74px;
}

.route-line {
  position: absolute;
  top: 36px;
  right: 34px;
  left: 34px;
  height: 1px;
  background: linear-gradient(90deg, var(--gold), var(--cyan) 48%, var(--violet));
}

.route-line::before {
  position: absolute;
  top: -3px;
  left: 0;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--paper);
  box-shadow: 0 0 18px var(--gold-soft);
  content: "";
  animation: packet-travel 4s ease-in-out infinite;
}

.endpoint {
  position: absolute;
  top: 8px;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #202029;
  color: var(--paper);
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 700;
  box-shadow: 0 8px 22px rgb(0 0 0 / 0.28);
}

.endpoint.left {
  left: 0;
}

.endpoint.middle {
  left: 50%;
  transform: translateX(-50%);
  border-color: rgb(75 192 204 / 0.55);
  color: #a9edf2;
}

.endpoint.right {
  right: 0;
}

.packet-card {
  position: absolute;
  z-index: 3;
  top: 224px;
  right: 28px;
  left: 28px;
  overflow: hidden;
  border: 1px solid #3b3b47;
  border-radius: 15px;
  background: rgb(28 28 36 / 0.95);
  box-shadow: 0 18px 40px rgb(0 0 0 / 0.3);
}

.packet-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--line-soft);
}

.packet-method {
  display: flex;
  align-items: center;
  gap: 9px;
  color: var(--paper);
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 800;
}

.packet-method::before {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 4px rgb(91 213 139 / 0.08);
  content: "";
}

.packet-meta {
  color: var(--faint);
  font-family: var(--mono);
  font-size: 10px;
}

.packet-rows {
  margin: 0;
  padding: 7px 0;
  list-style: none;
}

.packet-rows li {
  display: grid;
  padding: 9px 16px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 10px;
  grid-template-columns: 116px 1fr;
}

.packet-rows strong {
  color: var(--gold-soft);
  font-weight: 700;
}

.stream-line {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  border-top: 1px solid var(--line-soft);
  color: var(--faint);
  font-family: var(--mono);
  font-size: 9px;
  white-space: nowrap;
}

.stream-line span {
  color: var(--cyan);
}

.stage-note {
  position: absolute;
  z-index: 2;
  right: 24px;
  bottom: 18px;
  color: var(--faint);
  font-family: var(--mono);
  font-size: 9px;
}

@keyframes packet-travel {
  0%, 100% { transform: translateX(0); }
  50% { transform: translateX(calc(100% + 300px)); }
}

.proof-strip {
  padding: 28px 0 92px;
}

.product-frame {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.product-frame::before {
  position: absolute;
  z-index: 2;
  inset: 0;
  border: 1px solid rgb(255 255 255 / 0.055);
  border-radius: inherit;
  pointer-events: none;
  content: "";
}

.product-frame img {
  width: 100%;
  height: auto;
}

.proof-caption {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-top: 15px;
  color: var(--faint);
  font-family: var(--mono);
  font-size: 11px;
}

.proof-caption strong {
  color: var(--muted);
  font-weight: 600;
}

.section {
  padding: 92px 0;
  border-top: 1px solid rgb(255 255 255 / 0.07);
}

.section-head {
  display: grid;
  align-items: end;
  gap: 32px;
  grid-template-columns: minmax(0, 0.78fr) minmax(280px, 0.4fr);
}

.section h2 {
  max-width: 760px;
  margin: 0;
  color: var(--paper);
  font-family: var(--display);
  font-size: clamp(35px, 4.4vw, 58px);
  font-weight: 810;
  letter-spacing: -0.048em;
  line-height: 1.06;
}

.section-intro {
  margin: 0;
  color: var(--muted);
  font-size: 16px;
}

.signal-grid {
  display: grid;
  gap: 14px;
  margin-top: 46px;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.signal-card {
  min-height: 242px;
  padding: 24px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  background: var(--panel-soft);
}

.signal-code {
  display: inline-flex;
  min-height: 28px;
  align-items: center;
  padding: 0 9px;
  border: 1px solid var(--line);
  border-radius: 7px;
  color: var(--gold-soft);
  font-family: var(--mono);
  font-size: 10px;
}

.signal-card h3 {
  margin: 44px 0 10px;
  color: var(--paper);
  font-size: 17px;
  line-height: 1.3;
}

.signal-card p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
}

.case-study {
  display: grid;
  align-items: stretch;
  gap: 18px;
  margin-top: 48px;
  grid-template-columns: 0.78fr 1.22fr;
}

.case-copy,
.terminal {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
}

.case-copy {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 30px;
}

.case-copy h3 {
  margin: 0 0 18px;
  color: var(--paper);
  font-size: 25px;
  letter-spacing: -0.03em;
  line-height: 1.2;
}

.case-copy p {
  margin: 0;
  color: var(--muted);
}

.case-result {
  margin-top: 28px;
  color: var(--green);
  font-family: var(--mono);
  font-size: 11px;
}

.terminal {
  overflow: hidden;
  background: #0d0d12;
}

.terminal-bar {
  display: flex;
  align-items: center;
  gap: 7px;
  height: 46px;
  padding: 0 16px;
  border-bottom: 1px solid var(--line-soft);
  color: var(--faint);
  font-family: var(--mono);
  font-size: 10px;
}

.terminal-bar::before {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--red);
  box-shadow: 13px 0 0 var(--gold), 26px 0 0 var(--green);
  content: "";
  margin-right: 27px;
}

.terminal pre {
  overflow: auto;
  margin: 0;
  padding: 28px;
  color: #d5d2db;
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.8;
  white-space: pre-wrap;
}

.terminal .error {
  color: var(--red);
}

.terminal .key {
  color: var(--gold-soft);
}

.terminal .answer {
  color: var(--green);
}

.layer-table {
  margin-top: 46px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.layer-row {
  display: grid;
  min-height: 98px;
  align-items: center;
  border-bottom: 1px solid var(--line-soft);
  background: var(--panel-soft);
  grid-template-columns: 0.45fr 0.85fr 1.4fr;
}

.layer-row:last-child {
  border-bottom: 0;
}

.layer-row > * {
  padding: 22px 26px;
}

.layer-row .layer-name {
  color: var(--paper);
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 800;
}

.layer-row .layer-source {
  color: var(--gold-soft);
  font-size: 14px;
  font-weight: 700;
}

.layer-row p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.layer-row.is-wire {
  position: relative;
  background: linear-gradient(90deg, rgb(232 174 55 / 0.08), var(--panel-soft) 54%);
}

.layer-row.is-wire::before {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 3px;
  background: var(--gold);
  content: "";
}

.gallery {
  display: grid;
  gap: 18px;
  margin-top: 48px;
  grid-template-columns: 1.25fr 0.75fr;
}

.gallery-card {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
}

.gallery-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top left;
}

.gallery-card.tall {
  min-height: 420px;
}

.gallery-card.tall img {
  object-position: 16% top;
}

.safety-grid {
  display: grid;
  gap: 14px;
  margin-top: 46px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.safety-item {
  display: grid;
  gap: 18px;
  padding: 26px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  background: var(--panel-soft);
  grid-template-columns: 36px 1fr;
}

.safety-icon {
  display: grid;
  width: 36px;
  height: 36px;
  place-items: center;
  border: 1px solid rgb(91 213 139 / 0.28);
  border-radius: 10px;
  background: rgb(91 213 139 / 0.07);
  color: var(--green);
  font-family: var(--mono);
  font-size: 15px;
}

.safety-item h3 {
  margin: 0 0 7px;
  color: var(--paper);
  font-size: 16px;
}

.safety-item p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.final-cta {
  padding: 96px 0 110px;
}

.cta-panel {
  position: relative;
  overflow: hidden;
  padding: clamp(34px, 6vw, 66px);
  border: 1px solid rgb(232 174 55 / 0.4);
  border-radius: 24px;
  background:
    linear-gradient(120deg, rgb(232 174 55 / 0.12), transparent 42%),
    var(--panel);
}

.cta-panel::after {
  position: absolute;
  top: -50px;
  right: -70px;
  width: 310px;
  height: 210px;
  border: 1px dashed rgb(75 192 204 / 0.25);
  border-radius: 50%;
  content: "";
  transform: rotate(-12deg);
}

.cta-panel h1,
.cta-panel h2 {
  max-width: 760px;
  margin: 0;
  color: var(--paper);
  font-family: var(--display);
  font-size: clamp(35px, 5vw, 62px);
  font-weight: 820;
  letter-spacing: -0.05em;
  line-height: 1.05;
}

.cta-panel p {
  max-width: 640px;
  margin: 20px 0 0;
  color: var(--muted);
}

.site-footer {
  border-top: 1px solid rgb(255 255 255 / 0.07);
  color: var(--faint);
  font-size: 13px;
}

.footer-row {
  display: flex;
  min-height: 98px;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}

.footer-links a {
  color: var(--muted);
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--paper);
}

@media (max-width: 980px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }

  .wire-stage {
    min-height: 430px;
  }

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

  .section-head {
    align-items: start;
    grid-template-columns: 1fr;
  }

  .case-study {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .shell {
    width: min(calc(100% - 28px), var(--content));
  }

  .nav {
    min-height: 66px;
  }

  .nav-links a:not(.lang-link):not(.nav-github) {
    display: none;
  }

  .nav-links {
    gap: 10px;
  }

  .hero {
    padding: 66px 0 38px;
  }

  .hero h1 {
    font-size: clamp(42px, 14vw, 60px);
  }

  html[lang="zh-CN"] .hero h1 {
    font-size: clamp(40px, 12.5vw, 56px);
    letter-spacing: -0.04em;
    line-height: 1.02;
  }

  .wire-stage {
    min-height: 410px;
  }

  .route {
    right: 18px;
    left: 18px;
  }

  .endpoint {
    font-size: 8px;
  }

  .packet-card {
    right: 14px;
    left: 14px;
  }

  .packet-rows li {
    grid-template-columns: 96px 1fr;
  }

  .proof-strip {
    padding-bottom: 66px;
  }

  .proof-caption {
    align-items: flex-start;
    flex-direction: column;
  }

  .section {
    padding: 68px 0;
  }

  .signal-grid,
  .safety-grid,
  .gallery {
    grid-template-columns: 1fr;
  }

  .signal-card {
    min-height: auto;
  }

  .signal-card h3 {
    margin-top: 28px;
  }

  .layer-row {
    gap: 3px;
    padding: 20px;
    grid-template-columns: 1fr;
  }

  .layer-row > * {
    padding: 0;
  }

  .layer-row p {
    margin-top: 8px;
  }

  .gallery-card.tall {
    min-height: auto;
  }

  .footer-row {
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    padding-block: 28px;
  }
}

@media (max-width: 430px) {
  .brand span:last-child {
    display: none;
  }

  .nav-github {
    font-size: 12px !important;
  }

  .actions .button {
    width: 100%;
  }

  .wire-stage {
    min-height: 390px;
  }

  .endpoint.middle {
    display: none;
  }

  .packet-meta {
    display: none;
  }

  .packet-rows li {
    grid-template-columns: 82px 1fr;
    padding-inline: 12px;
  }

  .stream-line {
    overflow: hidden;
  }
}

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

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}