/* ============================================================
   EasyData · Official site
   Warm editorial minimalism — same tokens as the platform
   (cream paper / amber accent / ink text / deep-brown second)
   ============================================================ */

:root {
  --bg: #faf8f5;
  --bg-soft: #f6f1e9;
  --panel: #ffffff;
  --border: #eae5dd;
  --border-strong: #d9d2c6;
  --text: #292524;
  --text-2: #57534e;
  --muted: #a8a29e;
  --accent: #d97706;
  --accent-strong: #b45309;
  --accent-weak: rgba(217, 119, 6, 0.10);
  --second: #7c2d12;
  --good: #16a34a;

  --font-display: "Fraunces", "Noto Serif SC", "Songti SC", "STSong", serif;
  --font-body: "Instrument Sans", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "Cascadia Code", Consolas, monospace;

  --wrap: 1120px;
  --topbar-h: 64px;
  --radius: 12px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* Atmosphere: warm glow + faint grid + grain */
body::before {
  content: "";
  position: fixed; inset: 0;
  z-index: -2;
  background:
    radial-gradient(900px 480px at 82% -10%, rgba(217, 119, 6, 0.09), transparent 62%),
    radial-gradient(700px 420px at -8% 30%, rgba(124, 45, 18, 0.05), transparent 60%),
    var(--bg);
}
body::after {
  content: "";
  position: fixed; inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(120, 113, 108, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(120, 113, 108, 0.045) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(1100px 620px at 50% 0%, #000 30%, transparent 78%);
  -webkit-mask-image: radial-gradient(1100px 620px at 50% 0%, #000 30%, transparent 78%);
}

a { color: inherit; text-decoration: none; }
.mono { font-family: var(--font-mono); }
.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 28px; }

/* ============ Typography ============ */
.display {
  font-family: var(--font-display);
  font-weight: 520;
  font-variation-settings: "opsz" 60;
  letter-spacing: -0.015em;
  line-height: 1.12;
  margin: 0;
}
html[lang="zh"] .display { letter-spacing: 0.015em; font-weight: 560; }
h1.display { font-size: clamp(2.4rem, 5.2vw, 3.9rem); }
h2.display { font-size: clamp(1.7rem, 3.4vw, 2.5rem); }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-strong);
  margin: 0 0 18px;
}
.lead {
  font-size: clamp(1.02rem, 1.5vw, 1.15rem);
  color: var(--text-2);
  max-width: 58ch;
  margin: 20px 0 0;
}

/* ============ Buttons ============ */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  white-space: nowrap;
  padding: 12px 22px;
  border-radius: 10px;
  font-weight: 600; font-size: 15px;
  border: 1px solid transparent;
  transition: transform .18s ease, box-shadow .18s ease, background .18s ease, border-color .18s ease;
}
.btn:active { transform: translateY(1px); }
.btn-primary {
  background: var(--accent); color: #fff;
  box-shadow: 0 10px 24px rgba(217, 119, 6, 0.24);
}
.btn-primary:hover { background: var(--accent-strong); transform: translateY(-1px); box-shadow: 0 12px 28px rgba(217, 119, 6, 0.3); }
.btn-ghost { border-color: var(--border-strong); color: var(--text); background: transparent; }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent-strong); background: var(--accent-weak); }
.btn-sm { padding: 8px 16px; font-size: 13.5px; border-radius: 9px; }
.btn-lg { padding: 15px 30px; font-size: 16.5px; border-radius: 12px; }

/* ============ Topbar ============ */
.topbar {
  position: sticky; top: 0; z-index: 50;
  background: rgba(250, 248, 245, 0.86);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.topbar-in {
  height: var(--topbar-h);
  display: flex; align-items: center; gap: 28px;
}
.brand { display: inline-flex; align-items: center; gap: 11px; flex: none; }
.brand-name { font-weight: 650; font-size: 17px; letter-spacing: 0.01em; }

.mark { width: 30px; height: 30px; flex: none; }
.mark svg { width: 100%; height: 100%; overflow: visible; }
.mk-ring {
  fill: none; stroke: var(--border-strong); stroke-width: 1.6;
  stroke-dasharray: 4 6; stroke-linecap: round;
  transform-origin: 48px 48px;
  animation: mkSpin 28s linear infinite;
}
.mk-hex { fill: var(--accent-weak); stroke: var(--accent); stroke-width: 2.4; stroke-linejoin: round; }
.mk-bar { fill: var(--accent); opacity: .85; }
.mk-bar.mk-b2 { opacity: .68; }
.mk-bar.mk-b3 { opacity: .5; }
.mk-trend { fill: none; stroke: var(--second); stroke-width: 2.6; stroke-linecap: round; stroke-linejoin: round; }
.mk-dot { fill: var(--second); }
@keyframes mkSpin { to { transform: rotate(360deg); } }

.nav { display: flex; gap: 26px; margin-left: 12px; }
.nav a {
  font-size: 14.5px; font-weight: 500; color: var(--text-2);
  padding: 6px 2px; position: relative;
  transition: color .16s ease;
}
.nav a::after {
  content: ""; position: absolute; left: 0; right: 100%; bottom: 0;
  height: 2px; background: var(--accent);
  transition: right .22s ease;
}
.nav a:hover { color: var(--text); }
.nav a:hover::after { right: 0; }

.topbar-actions { margin-left: auto; display: flex; align-items: center; gap: 14px; }
.lang-sw {
  display: inline-flex; padding: 3px;
  border: 1px solid var(--border-strong); border-radius: 999px;
  background: var(--panel);
}
.lang-btn {
  appearance: none; border: 0; background: transparent;
  font-family: var(--font-body);
  font-size: 12.5px; font-weight: 600;
  white-space: nowrap;
  color: var(--text-2);
  padding: 5px 12px; border-radius: 999px;
  cursor: pointer;
  transition: background .16s ease, color .16s ease;
}
.lang-btn:hover { color: var(--text); }
.lang-btn.active { background: var(--text); color: var(--bg); }

/* ============ Hero ============ */
.hero { padding: 92px 0 96px; }
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.04fr) minmax(0, 0.96fr);
  gap: 64px; align-items: center;
}

.hero-cta { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 34px; }
.hero-note { margin: 26px 0 0; font-size: 12.5px; color: var(--muted); letter-spacing: 0.02em; }

/* --- Hero chart panel --- */
.hero-panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 24px 60px rgba(87, 60, 20, 0.10);
  padding: 22px 22px 18px;
  position: relative;
}
.hero-panel::before {
  content: "";
  position: absolute; inset: 0 0 auto 0; height: 3px;
  border-radius: var(--radius) var(--radius) 0 0;
  background: linear-gradient(90deg, var(--accent), var(--second));
  opacity: .85;
}
.panel-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 18px; }
.panel-title { font-size: 12px; color: var(--text-2); letter-spacing: 0.06em; }
.legend { display: inline-flex; align-items: center; gap: 7px; font-size: 12px; color: var(--text-2); }
.legend .lg { margin-right: 8px; }
.dot { width: 8px; height: 8px; border-radius: 50%; }
.dot-1 { background: var(--accent); }
.dot-2 { background: var(--second); }

.chart { padding: 4px 2px 0; }
.colgroup { display: flex; align-items: flex-end; gap: 14px; height: 190px; border-bottom: 1px solid var(--border-strong); padding-bottom: 0; }
.col { flex: 1; height: 100%; display: flex; align-items: flex-end; justify-content: center; gap: 5px; }
.bar {
  display: block; width: 16px; height: var(--h);
  border-radius: 5px 5px 0 0;
  transform-origin: bottom;
  animation: barGrow .9s cubic-bezier(.22, .9, .3, 1) backwards;
}
.bar.b1 { background: linear-gradient(180deg, var(--accent), #e8930f); }
.bar.b2 { background: var(--second); opacity: .8; }
.col:nth-child(1) .bar { animation-delay: .10s; }
.col:nth-child(2) .bar { animation-delay: .18s; }
.col:nth-child(3) .bar { animation-delay: .26s; }
.col:nth-child(4) .bar { animation-delay: .34s; }
.col:nth-child(5) .bar { animation-delay: .42s; }
.col:nth-child(6) .bar { animation-delay: .50s; }
.col:nth-child(7) .bar { animation-delay: .58s; }
@keyframes barGrow { from { transform: scaleY(0); } }

.days { display: flex; gap: 14px; margin-top: 8px; }
.days span { flex: 1; text-align: center; font-size: 10.5px; color: var(--muted); }

.panel-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.panel-tags span {
  font-size: 11px; letter-spacing: 0.04em;
  color: var(--accent-strong);
  background: var(--accent-weak);
  border: 1px solid rgba(217, 119, 6, 0.18);
  padding: 4px 10px; border-radius: 999px;
}

/* ============ Strip ============ */
.strip { border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); background: rgba(255, 255, 255, 0.5); }
.strip-in {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
  gap: 10px 18px; padding: 15px 28px;
  font-size: 12px; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--text-2);
}
.strip-in i { width: 4px; height: 4px; border-radius: 50%; background: var(--accent); opacity: .7; }

/* ============ Sections ============ */
.section { padding: 108px 0; }
.section-alt { background: linear-gradient(180deg, rgba(246, 241, 233, 0.65), rgba(246, 241, 233, 0.28)); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
section[id] { scroll-margin-top: calc(var(--topbar-h) + 16px); }

.sec-head { max-width: 640px; margin-bottom: 56px; }
.sec-head .lead { margin-top: 18px; }

/* --- Capabilities --- */
.cap-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.cap {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px 30px 26px;
  transition: transform .22s ease, box-shadow .22s ease, border-color .22s ease;
}
.cap:hover {
  transform: translateY(-3px);
  border-color: var(--border-strong);
  box-shadow: 0 18px 40px rgba(87, 60, 20, 0.10);
}
.cap::before {
  content: ""; position: absolute; left: 0; top: 22px; bottom: 22px; width: 3px;
  border-radius: 0 3px 3px 0;
  background: var(--accent);
  opacity: 0; transition: opacity .22s ease;
}
.cap:hover::before { opacity: 1; }
.cap-no { font-size: 12px; color: var(--accent-strong); letter-spacing: 0.12em; }
.cap h3 { font-family: var(--font-display); font-weight: 560; font-size: 21px; margin: 10px 0 8px; letter-spacing: -0.01em; }
.cap p { margin: 0; color: var(--text-2); font-size: 15px; }
.cap ul { list-style: none; margin: 18px 0 0; padding: 16px 0 0; border-top: 1px dashed var(--border); display: grid; gap: 8px; }
.cap li {
  font-size: 13.5px; color: var(--text-2);
  padding-left: 18px; position: relative;
}
.cap li::before {
  content: ""; position: absolute; left: 0; top: 0.62em;
  width: 7px; height: 7px; border-radius: 2px;
  background: var(--accent-weak); border: 1.5px solid var(--accent);
}

/* --- Insights: list + pivot mock --- */
.ins-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 56px; align-items: start;
}
.ins-item { padding: 20px 4px; border-bottom: 1px dashed var(--border); }
.ins-item:first-child { padding-top: 4px; }
.ins-item h3 { margin: 0 0 6px; font-size: 16.5px; font-weight: 620; }
.ins-item p { margin: 0; font-size: 14.5px; color: var(--text-2); }

.pivot {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: 0 18px 40px rgba(87, 60, 20, 0.08);
  position: sticky; top: calc(var(--topbar-h) + 24px);
}
.pv-head { font-size: 10.5px; letter-spacing: 0.12em; color: var(--accent-strong); margin: 0 0 14px; }
.pv-table { width: 100%; border-collapse: collapse; font-size: 12.5px; }
.pv-table th {
  text-align: left; font-weight: 500; color: var(--muted);
  padding: 8px 6px; border-bottom: 1px solid var(--border-strong); font-size: 11px;
}
.pv-table td {
  padding: 10px 6px; border-bottom: 1px solid var(--border);
  color: var(--text-2); font-variant-numeric: tabular-nums;
}
.pv-table td:first-child { color: var(--text); font-family: var(--font-body); font-size: 13px; }
.pv-table .pv-total td { border-bottom: 0; border-top: 2px solid var(--border-strong); color: var(--text); font-weight: 600; }
.pv-note { margin: 14px 0 0; font-size: 11px; color: var(--good); letter-spacing: 0.04em; }

.plat-key { font-size: 11px; letter-spacing: 0.18em; color: var(--accent-strong); margin: 0 0 10px; }

/* --- Data flow chains --- */
.chain { margin-bottom: 26px; }
.chain-label { font-size: 11.5px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--accent-strong); margin: 0 0 12px; }
.chain-steps {
  display: flex; align-items: stretch; gap: 10px; flex-wrap: wrap;
}
.step {
  display: flex; flex-direction: column; justify-content: center; gap: 2px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 13px 18px;
  min-width: 150px;
  transition: border-color .18s ease, transform .18s ease;
}
.step:hover { border-color: var(--accent); transform: translateY(-2px); }
.step b { font-weight: 600; font-size: 14.5px; }
.step i { font-style: normal; font-size: 12px; color: var(--muted); }
.arr {
  align-self: center;
  font-family: var(--font-mono);
  color: var(--accent); font-size: 17px;
  padding: 0 2px;
}
.flow-note {
  display: flex; align-items: baseline; gap: 14px;
  margin: 44px 0 0;
  padding: 20px 24px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-left: 3px solid var(--second);
  border-radius: 10px;
  color: var(--text-2); font-size: 15px;
  max-width: 860px;
}
.fn-key { font-size: 11px; letter-spacing: 0.16em; color: var(--second); flex: none; }

/* --- Discipline grid --- */
.disc-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; background: var(--panel); }
.disc { padding: 28px 28px 26px; border-right: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.disc:nth-child(3n) { border-right: 0; }
.disc:nth-child(n+4) { border-bottom: 0; }
.disc h3 { font-size: 16.5px; font-weight: 620; margin: 0 0 8px; display: flex; align-items: center; gap: 9px; }
.disc h3::before {
  content: ""; width: 8px; height: 8px; border-radius: 50%; flex: none;
  background: var(--accent);
}
.disc p { margin: 0; font-size: 14px; color: var(--text-2); }

/* --- Roles --- */
.role-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.role {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: transform .2s ease, box-shadow .2s ease;
}
.role:hover { transform: translateY(-3px); box-shadow: 0 16px 36px rgba(87, 60, 20, 0.09); }
.role h3 { font-family: var(--font-display); font-weight: 560; font-size: 20px; margin: 0 0 10px; }
.role p { margin: 0; font-size: 14.5px; color: var(--text-2); }

/* ============ CTA ============ */
.cta { padding: 128px 0; border-top: 1px solid var(--border); position: relative; overflow: hidden; }
.cta::before {
  content: "";
  position: absolute; inset: 0;
  background: radial-gradient(640px 300px at 50% 108%, rgba(217, 119, 6, 0.12), transparent 65%);
  pointer-events: none;
}
.cta-in { text-align: center; display: flex; flex-direction: column; align-items: center; position: relative; }
.cta .lead { margin: 16px 0 34px; }
.cta-url { margin: 20px 0 0; font-size: 12.5px; color: var(--muted); letter-spacing: 0.04em; }

/* ============ Footer ============ */
.footer { border-top: 1px solid var(--border); background: var(--panel); }
.footer-in {
  display: flex; align-items: flex-start; justify-content: space-between;
  gap: 32px; padding: 44px 28px 36px;
}
.footer-brand p { margin: 10px 0 0; font-size: 13.5px; color: var(--muted); max-width: 40ch; }
.footer-nav { display: flex; flex-wrap: wrap; gap: 8px 26px; padding-top: 4px; }
.footer-nav a { font-size: 13.5px; color: var(--text-2); transition: color .16s ease; }
.footer-nav a:hover { color: var(--accent-strong); }
.footer-base {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 18px 28px 26px;
  border-top: 1px solid var(--border);
  font-size: 11.5px; color: var(--muted); letter-spacing: 0.05em;
}

/* ============ Reveal on scroll ============ */
.rv { opacity: 0; transform: translateY(16px); transition: opacity .7s ease, transform .7s cubic-bezier(.22, .9, .3, 1); }
.rv[data-d="1"] { transition-delay: .08s; }
.rv[data-d="2"] { transition-delay: .16s; }
.rv[data-d="3"] { transition-delay: .24s; }
.rv[data-d="4"] { transition-delay: .32s; }
.rv.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .rv { opacity: 1; transform: none; transition: none; }
  .bar { animation: none !important; }
  .mk-ring { animation: none; }
}

/* ============ Responsive ============ */
@media (max-width: 1000px) {
  .hero-grid { grid-template-columns: 1fr; gap: 48px; }
  .hero { padding: 68px 0 76px; }
  .hero-panel { max-width: 560px; }
  .ins-grid { grid-template-columns: 1fr; gap: 40px; }
  .pivot { position: static; }
  .disc-grid { grid-template-columns: repeat(2, 1fr); }
  .disc:nth-child(3n) { border-right: 1px solid var(--border); }
  .disc:nth-child(2n) { border-right: 0; }
  .disc:nth-child(n+4) { border-bottom: 1px solid var(--border); }
  .disc:nth-child(n+5) { border-bottom: 0; }
}

@media (max-width: 860px) {
  .nav { display: none; }
  .section { padding: 84px 0; }
}

@media (max-width: 760px) {
  .cap-grid, .role-grid { grid-template-columns: 1fr; }
  .chain-steps { flex-direction: column; align-items: stretch; }
  .arr { transform: rotate(90deg); align-self: flex-start; padding: 0 0 0 24px; }
  .strip-in { justify-content: flex-start; }
  .footer-in { flex-direction: column; }
  .cta { padding: 96px 0; }
}

@media (max-width: 560px) {
  .wrap { padding: 0 20px; }
  .topbar-in { gap: 12px; }
  .topbar-actions { gap: 8px; }
  .brand-name { font-size: 16px; }
  .btn-sm { padding: 8px 12px; font-size: 13px; }
  .disc-grid { grid-template-columns: 1fr; }
  .disc, .disc:nth-child(3n), .disc:nth-child(2n) { border-right: 0; }
  .disc:nth-child(n+2) { border-top: 1px solid var(--border); }
  .disc:nth-child(n+4) { border-bottom: 0; border-top: 1px solid var(--border); }
  .disc:first-child { border-top: 0; }
  .lang-btn { padding: 5px 9px; }
  .hero-cta .btn { flex: 1; justify-content: center; }
  .colgroup { height: 150px; }
  .bar { width: 12px; }
}

/* ZH typographic fine-tuning */
html[lang="zh"] body { font-size: 15.5px; }
html[lang="zh"] .lead { line-height: 1.8; }
html[lang="zh"] .eyebrow { letter-spacing: 0.3em; }
html[lang="zh"] .strip-in { letter-spacing: 0.2em; }