/* CenkorMES 独立版 官网样式 — 自包含，无外部依赖 */

:root {
  --bg: #070a0f;
  --bg-1: #0b1119;
  --bg-2: #0f1722;
  --bg-3: #141f2c;
  --line: #1d2a3a;
  --line-soft: #16202d;
  --text: #e9eff6;
  --text-2: #a9b8ca;
  --text-3: #74849a;
  --accent: #2dd4bf;
  --accent-dim: #14b8a6;
  --accent-glow: rgba(45, 212, 191, 0.14);
  --blue: #38bdf8;
  --amber: #fbbf24;
  --violet: #a78bfa;
  --rose: #fb7185;
  --radius: 14px;
  --radius-sm: 9px;
  --max: 1180px;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
h1, h2, h3, h4 { margin: 0; line-height: 1.25; letter-spacing: -0.015em; }
p { margin: 0; }
ul { margin: 0; padding: 0; list-style: none; }
code, pre { font-family: var(--mono); }

.container {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- nav ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(7, 10, 15, 0.82);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line-soft);
}

.nav-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  gap: 28px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 17px;
  letter-spacing: -0.02em;
  white-space: nowrap;
}

.brand-mark {
  width: 30px;
  height: 30px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--accent) 0%, #0e7490 100%);
  display: grid;
  place-items: center;
  font-size: 13px;
  font-weight: 800;
  color: #04141a;
  letter-spacing: -0.04em;
  flex: none;
}

.brand em {
  font-style: normal;
  font-size: 11px;
  font-weight: 600;
  color: var(--accent);
  border: 1px solid rgba(45, 212, 191, 0.32);
  background: rgba(45, 212, 191, 0.08);
  border-radius: 5px;
  padding: 1px 5px;
  margin-left: 2px;
  vertical-align: 2px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 26px;
  margin-left: auto;
  font-size: 14.5px;
  font-weight: 500;
  color: var(--text-2);
}

.nav-links a { transition: color 0.16s; }
.nav-links a:hover, .nav-links a.active { color: var(--accent); }

.nav-cta { display: flex; align-items: center; gap: 10px; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 42px;
  padding: 0 20px;
  border-radius: 10px;
  font-size: 14.5px;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.14s, background 0.16s, border-color 0.16s, box-shadow 0.16s;
  white-space: nowrap;
}

.btn:active { transform: translateY(1px); }

.btn-primary {
  background: var(--accent);
  color: #04161a;
  box-shadow: 0 6px 20px -8px rgba(45, 212, 191, 0.6);
}
.btn-primary:hover { background: #5eead4; box-shadow: 0 10px 26px -8px rgba(45, 212, 191, 0.75); }

.btn-ghost {
  background: rgba(255, 255, 255, 0.03);
  border-color: var(--line);
  color: var(--text);
}
.btn-ghost:hover { border-color: #2c3d51; background: rgba(255, 255, 255, 0.06); }

.btn-sm { height: 34px; padding: 0 14px; font-size: 13.5px; border-radius: 8px; }
.btn-lg { height: 48px; padding: 0 26px; font-size: 15.5px; border-radius: 11px; }

.btn svg { width: 16px; height: 16px; flex: none; }

/* ---------- hero ---------- */
.hero {
  position: relative;
  padding: 84px 0 76px;
  overflow: hidden;
  border-bottom: 1px solid var(--line-soft);
}

.hero::before {
  content: "";
  position: absolute;
  inset: -20% -10% auto -10%;
  height: 620px;
  background:
    radial-gradient(600px 320px at 18% 8%, rgba(45, 212, 191, 0.13), transparent 70%),
    radial-gradient(520px 300px at 82% 0%, rgba(56, 189, 248, 0.09), transparent 72%);
  pointer-events: none;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(var(--line-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-soft) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(circle at 50% 20%, #000 0%, transparent 72%);
  opacity: 0.5;
  pointer-events: none;
}

.hero-grid {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.08fr 0.92fr;
  gap: 56px;
  align-items: center;
}

/* grid/flex 子项默认 min-width:auto，长内容会把容器撑破 */
.hero-grid > *,
.step > div,
.card,
.arch-layer,
.code { min-width: 0; }

.term { max-width: 100%; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--accent);
  background: rgba(45, 212, 191, 0.07);
  border: 1px solid rgba(45, 212, 191, 0.22);
  border-radius: 999px;
  padding: 5px 13px 5px 10px;
  margin-bottom: 22px;
}

.eyebrow .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 3px rgba(45, 212, 191, 0.18);
}

.hero h1 {
  font-size: clamp(2.15rem, 4.6vw, 3.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 22px;
}

.grad {
  background: linear-gradient(100deg, #5eead4 0%, #38bdf8 55%, #a78bfa 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-sub {
  font-size: 16.5px;
  color: var(--text-2);
  line-height: 1.85;
  max-width: 560px;
  margin-bottom: 30px;
}

.hero-sub strong { color: var(--text); font-weight: 600; }

.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 30px; }

.hero-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  font-size: 13.5px;
  color: var(--text-3);
}

.hero-facts li { display: flex; align-items: center; gap: 7px; }
.hero-facts li::before {
  content: "";
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0.75;
}

/* terminal card */
.term {
  background: linear-gradient(180deg, #0d1520 0%, #0a1017 100%);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 30px 70px -30px rgba(0, 0, 0, 0.9), 0 0 0 1px rgba(45, 212, 191, 0.05) inset;
}

.term-bar {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 11px 14px;
  border-bottom: 1px solid var(--line-soft);
  background: rgba(255, 255, 255, 0.015);
}

.term-bar i {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: #2a3949;
  flex: none;
}
.term-bar i:nth-child(1) { background: #f87171; opacity: 0.65; }
.term-bar i:nth-child(2) { background: #fbbf24; opacity: 0.65; }
.term-bar i:nth-child(3) { background: #34d399; opacity: 0.65; }

.term-bar span {
  margin-left: 6px;
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--text-3);
}

.term-body {
  padding: 16px 18px 18px;
  font-family: var(--mono);
  font-size: 12.7px;
  line-height: 1.95;
  color: var(--text-2);
  overflow-x: auto;
  margin: 0;
  white-space: pre;
}

.term-body .c { color: #526478; }
.term-body .k { color: #5eead4; }
.term-body .s { color: #fbbf24; }
.term-body .ok { color: #34d399; }
.term-body .dim { color: #64748b; }

.term-status {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border-top: 1px solid var(--line-soft);
  font-size: 12px;
  color: var(--text-3);
  background: rgba(45, 212, 191, 0.03);
}

.pulse {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 0 rgba(45, 212, 191, 0.55);
  animation: pulse 2.4s infinite;
  flex: none;
}

@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(45, 212, 191, 0.5); }
  70% { box-shadow: 0 0 0 8px rgba(45, 212, 191, 0); }
  100% { box-shadow: 0 0 0 0 rgba(45, 212, 191, 0); }
}

/* ---------- stats ---------- */
.stats {
  border-bottom: 1px solid var(--line-soft);
  background: var(--bg-1);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}

.stat {
  padding: 30px 24px;
  text-align: center;
  border-right: 1px solid var(--line-soft);
}
.stat:last-child { border-right: 0; }

.stat b {
  display: block;
  font-family: var(--mono);
  font-size: 30px;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text);
  line-height: 1.2;
}
.stat b i { font-style: normal; font-size: 15px; color: var(--accent); margin-left: 2px; }

.stat span {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  color: var(--text-3);
}

/* ---------- section ---------- */
.section { padding: 84px 0; }
.section-alt { background: var(--bg-1); border-top: 1px solid var(--line-soft); border-bottom: 1px solid var(--line-soft); }

.sec-head { max-width: 720px; margin-bottom: 48px; }
.sec-head.center { margin-left: auto; margin-right: auto; text-align: center; }

.sec-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 14px;
}

.sec-head h2 {
  font-size: clamp(1.6rem, 2.9vw, 2.15rem);
  font-weight: 700;
  margin-bottom: 14px;
}

.sec-head p { color: var(--text-2); font-size: 15.5px; line-height: 1.8; }

/* ---------- flow ---------- */
.flow {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: 10px;
  margin-top: 8px;
}

.flow-step {
  position: relative;
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: 11px;
  padding: 16px 12px 14px;
  text-align: center;
  transition: border-color 0.18s, transform 0.18s;
}

.flow-step:hover { border-color: rgba(45, 212, 191, 0.42); transform: translateY(-2px); }

.flow-step .n {
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--text-3);
  display: block;
  margin-bottom: 8px;
}

.flow-step .t { font-size: 13.5px; font-weight: 600; line-height: 1.45; }

.flow-step.edge { border-color: rgba(45, 212, 191, 0.3); background: rgba(45, 212, 191, 0.05); }

.flow-note {
  margin-top: 18px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 13.5px;
  color: var(--text-3);
  background: var(--bg-2);
  border: 1px dashed var(--line);
  border-radius: 10px;
  padding: 14px 16px;
}

.flow-note b { color: var(--accent); font-weight: 600; flex: none; }

/* ---------- arch ---------- */
.arch { display: grid; gap: 14px; }

.arch-layer {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-2);
  padding: 22px 24px;
}

.arch-layer.core { border-color: rgba(45, 212, 191, 0.3); background: linear-gradient(180deg, rgba(45, 212, 191, 0.055), rgba(45, 212, 191, 0.015)); }

.arch-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.arch-tag {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  padding: 3px 9px;
  border-radius: 5px;
  background: var(--bg-3);
  color: var(--text-2);
  border: 1px solid var(--line);
}

.arch-layer.core .arch-tag { background: rgba(45, 212, 191, 0.12); color: var(--accent); border-color: rgba(45, 212, 191, 0.3); }

.arch-head h3 { font-size: 16.5px; font-weight: 650; }
.arch-head p { font-size: 13.5px; color: var(--text-3); width: 100%; margin-top: 2px; }

.chips { display: flex; flex-wrap: wrap; gap: 8px; }

.chip {
  font-size: 13px;
  padding: 5px 11px;
  border-radius: 7px;
  background: var(--bg-3);
  border: 1px solid var(--line);
  color: var(--text-2);
  white-space: nowrap;
}

.arch-layer.core .chip { background: rgba(45, 212, 191, 0.07); border-color: rgba(45, 212, 191, 0.2); color: #9defe4; }

.arch-arrow {
  display: grid;
  place-items: center;
  font-size: 12px;
  color: var(--text-3);
  font-family: var(--mono);
  gap: 0;
  line-height: 1;
  padding: 2px 0;
}

/* ---------- cards ---------- */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }

.card {
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  transition: border-color 0.2s, transform 0.2s, background 0.2s;
}

.card:hover { border-color: #2a3b4f; transform: translateY(-2px); }

.card .ic {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  font-size: 17px;
  margin-bottom: 15px;
  background: rgba(45, 212, 191, 0.09);
  border: 1px solid rgba(45, 212, 191, 0.18);
}

.card h3 { font-size: 16px; font-weight: 650; margin-bottom: 9px; }
.card p { font-size: 14px; color: var(--text-2); line-height: 1.75; }

.card .meta { margin-top: 14px; display: flex; flex-wrap: wrap; gap: 6px; }

.badge {
  font-size: 11.5px;
  font-family: var(--mono);
  padding: 2px 7px;
  border-radius: 5px;
  background: var(--bg-3);
  border: 1px solid var(--line);
  color: var(--text-3);
}

.badge.ai { color: #c4b5fd; border-color: rgba(167, 139, 250, 0.28); background: rgba(167, 139, 250, 0.08); }
.badge.free { color: #6ee7b7; border-color: rgba(52, 211, 153, 0.28); background: rgba(52, 211, 153, 0.08); }

/* extension catalog */
.ext-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin-bottom: 28px;
  padding: 14px 16px;
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: 12px;
}

.ext-search {
  flex: 1 1 240px;
  min-width: 180px;
  height: 38px;
  padding: 0 13px;
  border-radius: 8px;
  background: var(--bg);
  border: 1px solid var(--line);
  color: var(--text);
  font-size: 14px;
  font-family: var(--sans);
  outline: none;
  transition: border-color 0.16s;
}
.ext-search::placeholder { color: var(--text-3); }
.ext-search:focus { border-color: rgba(45, 212, 191, 0.5); }

.ext-filters { display: flex; flex-wrap: wrap; gap: 7px; }

.filter-btn {
  font-size: 13px;
  padding: 6px 12px;
  border-radius: 7px;
  background: var(--bg);
  border: 1px solid var(--line);
  color: var(--text-2);
  cursor: pointer;
  font-family: var(--sans);
  transition: all 0.16s;
}
.filter-btn:hover { border-color: #2c3d51; color: var(--text); }
.filter-btn.on {
  background: rgba(45, 212, 191, 0.12);
  border-color: rgba(45, 212, 191, 0.42);
  color: var(--accent);
  font-weight: 600;
}

.ext-group { margin-bottom: 38px; }
.ext-group:last-child { margin-bottom: 0; }

.ext-group-title {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line-soft);
}

.ext-group-title h3 { font-size: 15.5px; font-weight: 650; }
.ext-group-title span { font-family: var(--mono); font-size: 12px; color: var(--text-3); }

.ext-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }

.ext-item {
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: 11px;
  padding: 17px 18px;
  transition: border-color 0.18s, transform 0.18s;
}

.ext-item:hover { border-color: rgba(45, 212, 191, 0.35); transform: translateY(-2px); }

.ext-item h4 {
  font-size: 14.5px;
  font-weight: 650;
  margin-bottom: 7px;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.ext-item h4 code {
  font-size: 10.5px;
  color: var(--text-3);
  font-weight: 400;
  background: var(--bg);
  border: 1px solid var(--line-soft);
  border-radius: 4px;
  padding: 1px 5px;
}

.ext-item p { font-size: 13px; color: var(--text-2); line-height: 1.7; }

.ext-item .ver {
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--text-3);
  margin-top: 10px;
  display: block;
}

.ext-empty {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-3);
  font-size: 14.5px;
  display: none;
}

/* ---------- code ---------- */
.code {
  background: #0a0f16;
  border: 1px solid var(--line);
  border-radius: 11px;
  overflow: hidden;
}

.code-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 9px 14px;
  border-bottom: 1px solid var(--line-soft);
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--text-3);
  background: rgba(255, 255, 255, 0.015);
}

.code pre {
  margin: 0;
  padding: 15px 17px;
  overflow-x: auto;
  font-size: 12.8px;
  line-height: 1.9;
  color: #c7d5e4;
}

.code pre .c { color: #526478; }
.code pre .k { color: #5eead4; }
.code pre .s { color: #fbbf24; }
.code pre .v { color: #a78bfa; }

/* ---------- boundary ---------- */
.boundary { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

.bd-card {
  border-radius: var(--radius);
  padding: 24px 26px;
  border: 1px solid var(--line);
  background: var(--bg-2);
}

.bd-card.yes { border-color: rgba(45, 212, 191, 0.28); background: linear-gradient(180deg, rgba(45, 212, 191, 0.05), transparent); }
.bd-card.no { border-color: rgba(148, 163, 184, 0.16); }

.bd-card h3 {
  font-size: 15.5px;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 9px;
}

.bd-card h3 .mark {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 11px;
  font-weight: 700;
  flex: none;
}

.bd-card.yes h3 .mark { background: rgba(45, 212, 191, 0.16); color: var(--accent); }
.bd-card.no h3 .mark { background: rgba(148, 163, 184, 0.14); color: #94a3b8; }

.bd-card li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.8;
  margin-bottom: 7px;
}

.bd-card li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: #475569;
}

.bd-card.yes li::before { background: var(--accent); opacity: 0.75; }

/* ---------- cta ---------- */
.cta {
  position: relative;
  padding: 84px 0;
  text-align: center;
  overflow: hidden;
  border-top: 1px solid var(--line-soft);
  background: var(--bg-1);
}

.cta::before {
  content: "";
  position: absolute;
  inset: auto 0 -60% 0;
  height: 420px;
  background: radial-gradient(600px 260px at 50% 100%, rgba(45, 212, 191, 0.13), transparent 70%);
  pointer-events: none;
}

.cta h2 { font-size: clamp(1.7rem, 3.2vw, 2.4rem); font-weight: 750; margin-bottom: 16px; position: relative; }
.cta p { color: var(--text-2); font-size: 16px; max-width: 620px; margin: 0 auto 32px; position: relative; line-height: 1.8; }
.cta-actions { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; position: relative; }

/* ---------- footer ---------- */
.footer {
  background: var(--bg);
  border-top: 1px solid var(--line-soft);
  padding: 48px 0 34px;
  font-size: 13.5px;
  color: var(--text-3);
}

.footer-top {
  display: flex;
  justify-content: space-between;
  gap: 40px;
  flex-wrap: wrap;
  padding-bottom: 30px;
  border-bottom: 1px solid var(--line-soft);
}

.footer-brand { max-width: 330px; }
.footer-brand .brand { margin-bottom: 12px; }
.footer-brand p { line-height: 1.8; }

.footer-cols { display: flex; gap: 56px; flex-wrap: wrap; }
.footer-col h4 { font-size: 13px; color: var(--text); font-weight: 650; margin-bottom: 13px; }
.footer-col li { margin-bottom: 9px; }
.footer-col a:hover { color: var(--accent); }

.footer-bottom {
  padding-top: 22px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 12.5px;
}

.footer-bottom a:hover { color: var(--accent); }

/* ---------- page hero (inner) ---------- */
.page-hero {
  padding: 56px 0 46px;
  border-bottom: 1px solid var(--line-soft);
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: "";
  position: absolute;
  inset: -40% -10% auto -10%;
  height: 380px;
  background: radial-gradient(560px 240px at 26% 0%, rgba(45, 212, 191, 0.1), transparent 70%);
  pointer-events: none;
}

.page-hero .container { position: relative; }
.page-hero h1 { font-size: clamp(1.8rem, 3.6vw, 2.6rem); font-weight: 750; margin-bottom: 14px; }
.page-hero p { color: var(--text-2); font-size: 15.5px; max-width: 680px; line-height: 1.8; }

.crumb { font-size: 13px; color: var(--text-3); margin-bottom: 18px; }
.crumb a:hover { color: var(--accent); }
.crumb span { margin: 0 7px; opacity: 0.5; }

/* ---------- deploy ---------- */
.step-list { display: grid; gap: 14px; }

.step {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 18px;
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px 24px;
}

.step .num {
  width: 30px;
  height: 30px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--accent);
  background: rgba(45, 212, 191, 0.1);
  border: 1px solid rgba(45, 212, 191, 0.24);
}

.step h3 { font-size: 15.5px; margin-bottom: 8px; }
.step p { font-size: 14px; color: var(--text-2); line-height: 1.8; margin-bottom: 12px; }
.step p:last-child { margin-bottom: 0; }

table.tbl {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  margin: 4px 0 0;
}

table.tbl th, table.tbl td {
  text-align: left;
  padding: 11px 14px;
  border-bottom: 1px solid var(--line-soft);
}

table.tbl th {
  font-size: 12.5px;
  font-weight: 650;
  color: var(--text-3);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: rgba(255, 255, 255, 0.02);
}

table.tbl td { color: var(--text-2); }
table.tbl td:first-child { color: var(--text); font-weight: 500; white-space: nowrap; }
table.tbl tr:last-child td { border-bottom: 0; }

table.tbl code {
  font-size: 12.5px;
  background: var(--bg);
  border: 1px solid var(--line-soft);
  border-radius: 4px;
  padding: 1px 6px;
  color: #9defe4;
}

.tbl-wrap {
  border: 1px solid var(--line);
  border-radius: 11px;
  overflow: hidden;
  overflow-x: auto;
}

/* faq */
.faq details {
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: 11px;
  padding: 0;
  margin-bottom: 10px;
  overflow: hidden;
}

.faq summary {
  padding: 16px 20px;
  font-size: 14.5px;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  font-family: var(--mono);
  color: var(--accent);
  font-size: 17px;
  flex: none;
  transition: transform 0.2s;
}
.faq details[open] summary::after { content: "−"; }

.faq .faq-body { padding: 0 20px 18px; font-size: 14px; color: var(--text-2); line-height: 1.85; }
.faq .faq-body p + p { margin-top: 10px; }
.faq .faq-body code {
  font-size: 12.5px;
  background: var(--bg);
  border: 1px solid var(--line-soft);
  border-radius: 4px;
  padding: 1px 6px;
  color: #9defe4;
}

.callout {
  display: flex;
  gap: 13px;
  padding: 16px 18px;
  border-radius: 11px;
  background: rgba(251, 191, 36, 0.055);
  border: 1px solid rgba(251, 191, 36, 0.22);
  font-size: 13.8px;
  color: #e8d9a8;
  line-height: 1.8;
}

.callout b { color: var(--amber); }

/* inline code */
p code, li code, .flow-note code, .bd-card code, .card code {
  font-family: var(--mono);
  font-size: 0.87em;
  background: #0a0f16;
  border: 1px solid var(--line-soft);
  border-radius: 4px;
  padding: 1px 5px;
  color: #9defe4;
  white-space: nowrap;
}
.callout.info { background: rgba(56, 189, 248, 0.05); border-color: rgba(56, 189, 248, 0.2); color: #c2e4f7; }

/* ---------- responsive ---------- */
@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .hero-sub { max-width: none; }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .ext-grid { grid-template-columns: repeat(2, 1fr); }
  .flow { grid-template-columns: repeat(4, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat:nth-child(2) { border-right: 0; }
  .stat:nth-child(1), .stat:nth-child(2) { border-bottom: 1px solid var(--line-soft); }
  .nav-links { display: none; }
  .boundary { grid-template-columns: 1fr; }
}

@media (max-width: 767px) {
  body { font-size: 15.5px; }
  .container, .nav-inner { padding: 0 18px; }
  .hero { padding: 56px 0 52px; }
  .section { padding: 60px 0; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .ext-grid { grid-template-columns: 1fr; }
  .flow { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat { padding: 22px 12px; }
  .stat b { font-size: 24px; }
  .nav-cta .btn-ghost { display: none; }
  .nav-inner { gap: 14px; }
  .step { grid-template-columns: 1fr; gap: 12px; }
  .footer-cols { gap: 36px; }
  .cta { padding: 60px 0; }
  .page-hero { padding: 42px 0 36px; }
  .arch-layer { padding: 18px; }
  .card { padding: 20px; }
  .ext-toolbar { padding: 12px; }
  /* 窄屏下终端卡片改为折行，不横向撑破布局 */
  .term-body {
    white-space: pre-wrap;
    overflow-wrap: break-word;
    font-size: 11.6px;
    line-height: 1.85;
  }
  .code pre { font-size: 11.8px; white-space: pre-wrap; overflow-wrap: break-word; }
  .hero-facts { font-size: 12.5px; gap: 6px 14px; }
}