:root {
  --bg: #eef5f1;
  --bg-deep: #e2eee8;
  --surface: #ffffff;
  --ink: #12241f;
  --ink-soft: #3d554d;
  --muted: #6b8178;
  --line: #c9ddd4;
  --teal: #0c7a68;
  --teal-deep: #085f52;
  --teal-bright: #12a08a;
  --teal-wash: #d7efe8;
  --amber: #b8893a;
  --font-display: "Outfit", "Noto Sans SC", sans-serif;
  --font-body: "IBM Plex Sans", "Noto Sans SC", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;
  --max: 1120px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  font-family: var(--font-body);
  background: var(--bg);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button, .btn {
  font: inherit;
  cursor: pointer;
  border: 0;
}

/* atmosphere */
.site-bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(ellipse 90% 55% at 12% -10%, #cfe9df 0%, transparent 55%),
    radial-gradient(ellipse 70% 45% at 92% 8%, #d9ebe4 0%, transparent 50%),
    linear-gradient(180deg, #f3faf6 0%, var(--bg) 38%, var(--bg-deep) 100%);
}
.site-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.35;
  background-image:
    linear-gradient(rgba(18, 36, 31, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(18, 36, 31, 0.035) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(180deg, #000 0%, transparent 70%);
}

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

/* nav */
.nav {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(14px);
  background: rgba(243, 250, 246, 0.78);
  border-bottom: 1px solid rgba(201, 221, 212, 0.7);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 64px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 650;
  letter-spacing: -0.03em;
  font-size: 1.05rem;
}
.brand-mark {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: linear-gradient(145deg, var(--teal-bright), var(--teal-deep));
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.25);
  position: relative;
}
.brand-mark::before {
  content: "";
  position: absolute;
  inset: 7px 8px;
  border: 2px solid #fff;
  border-radius: 3px;
  opacity: 0.9;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-links a {
  padding: 8px 12px;
  border-radius: 8px;
  color: var(--ink-soft);
  font-size: 0.92rem;
}
.nav-links a:hover,
.nav-links a.is-active {
  color: var(--teal-deep);
  background: rgba(12, 122, 104, 0.08);
}
.nav-cta {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-shrink: 0;
}
.nav-cta .btn-ghost.nav-github-mobile { display: none; }
@media (max-width: 720px) {
  .nav-cta .btn-ghost { display: none; }
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 42px;
  padding: 0 16px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.92rem;
  transition: transform 0.18s ease, background 0.18s ease, color 0.18s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary {
  background: var(--teal);
  color: #fff;
}
.btn-primary:hover { background: var(--teal-deep); }
.btn-ghost {
  background: transparent;
  color: var(--ink-soft);
  border: 1px solid var(--line);
}
.btn-ghost:hover {
  background: #fff;
  color: var(--ink);
}

/* hero */
.hero {
  padding: 72px 0 0;
  min-height: calc(100vh - 64px);
  display: flex;
  flex-direction: column;
}
.hero-copy {
  max-width: 780px;
  margin-bottom: 28px;
  animation: rise 0.7s ease both;
}
.hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(3.8rem, 9.5vw, 6.4rem);
  letter-spacing: -0.06em;
  line-height: 0.92;
  color: var(--ink);
}
.hero .headline {
  margin: 26px 0 14px;
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 2.8vw, 2rem);
  font-weight: 550;
  letter-spacing: -0.035em;
  color: var(--teal-deep);
  line-height: 1.2;
}
.hero .lede {
  margin: 0 0 30px;
  max-width: 36rem;
  color: var(--ink-soft);
  font-size: 1.12rem;
  line-height: 1.7;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  animation: rise 0.8s 0.08s ease both;
}
.btn-primary {
  min-width: 148px;
  min-height: 48px;
  font-size: 0.98rem;
}

.hero-stage {
  margin-top: auto;
  animation: rise 0.9s 0.12s ease both;
}
.hero-stage-frame {
  width: 100vw;
  margin-left: calc(50% - 50vw);
  border-top: 1px solid rgba(183, 208, 198, 0.85);
  background:
    radial-gradient(ellipse 80% 60% at 50% 0%, rgba(255,255,255,0.55), transparent 55%),
    linear-gradient(180deg, #cfe6db 0%, #b9d8cb 100%);
  padding: 36px 0 0;
  overflow: hidden;
  position: relative;
}
.hero-stage-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(18, 36, 31, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(18, 36, 31, 0.04) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: linear-gradient(180deg, #000, transparent 85%);
  pointer-events: none;
}
.console-mock {
  position: relative;
  width: min(1240px, calc(100% - 24px));
  margin: 0 auto;
  border: 1px solid #9fc0b3;
  border-bottom: 0;
  border-radius: 16px 16px 0 0;
  background: #f7faf8;
  box-shadow:
    0 0 0 1px rgba(255,255,255,0.35) inset,
    0 -18px 60px rgba(12, 70, 55, 0.14);
  display: grid;
  grid-template-columns: 200px 1fr;
  min-height: 460px;
  overflow: hidden;
}
.console-side {
  background: #fff;
  border-right: 1px solid #dde8e3;
  padding: 18px 14px;
}
.console-side .mini-brand {
  display: flex;
  gap: 8px;
  align-items: center;
  font-size: 13px;
  font-weight: 650;
  margin-bottom: 22px;
}
.console-side .dot {
  width: 22px;
  height: 22px;
  border-radius: 6px;
  background: var(--teal);
}
.console-nav {
  display: grid;
  gap: 6px;
}
.console-nav span {
  display: block;
  padding: 9px 10px;
  border-radius: 7px;
  font-size: 11px;
  color: #73848c;
}
.console-nav span.on {
  background: #eaf5f1;
  color: #0c8774;
  font-weight: 600;
}
.console-main { padding: 18px 20px 24px; }
.console-top {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 16px;
}
.console-top h2 {
  margin: 0;
  font-size: 20px;
  letter-spacing: -0.03em;
}
.console-top small { color: #8a9aa2; font-size: 11px; }
.metric-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  margin-bottom: 12px;
}
.metric {
  background: #fff;
  border: 1px solid #e1ebe6;
  border-radius: 9px;
  padding: 12px 13px;
}
.metric label {
  display: block;
  color: #85929b;
  font-size: 10px;
  margin-bottom: 8px;
}
.metric strong {
  font-size: 22px;
  letter-spacing: -0.04em;
  font-variant-numeric: tabular-nums;
}
.metric .bar {
  margin-top: 10px;
  height: 3px;
  background: #eef3f2;
  border-radius: 99px;
  overflow: hidden;
}
.metric .bar i {
  display: block;
  height: 100%;
  background: #159986;
  border-radius: 99px;
}
.chart-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}
.chart-card {
  background: #fff;
  border: 1px solid #e1ebe6;
  border-radius: 9px;
  padding: 12px 14px 8px;
  min-height: 150px;
}
.chart-card header {
  display: flex;
  justify-content: space-between;
  color: #7f9098;
  font-size: 11px;
  margin-bottom: 8px;
}
.spark {
  width: 100%;
  height: 96px;
}

/* sections */
.section {
  padding: 88px 0;
}
.section-head {
  max-width: 560px;
  margin-bottom: 36px;
}
.section-head h2 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 3vw, 2.25rem);
  letter-spacing: -0.035em;
  line-height: 1.15;
}
.section-head p {
  margin: 0;
  color: var(--muted);
  font-size: 1.02rem;
}

.cap-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px 28px;
}
.cap {
  padding-top: 16px;
  border-top: 1px solid var(--line);
}
.cap h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 1.15rem;
  letter-spacing: -0.02em;
}
.cap p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.65;
}

.install-band {
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 16px;
  padding: 28px;
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 24px;
  align-items: center;
}
.install-band h2 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 1.7rem;
  letter-spacing: -0.03em;
}
.install-band p {
  margin: 0 0 16px;
  color: var(--muted);
}
.code-block {
  background: #14332c;
  color: #d7efe8;
  border-radius: 12px;
  padding: 16px 18px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.7;
  overflow-x: auto;
}
.code-block .prompt { color: #78c7b4; }
.code-block .comment { color: #7f9b92; }

.audience {
  display: grid;
  gap: 14px;
}
.audience li {
  list-style: none;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: 1.05rem;
}
.audience { margin: 0; padding: 0; }

.news {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 18px 28px;
  align-items: start;
}
.version-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border-radius: 999px;
  background: var(--teal-wash);
  color: var(--teal-deep);
  font-weight: 650;
  font-size: 0.92rem;
}
.news ul {
  margin: 0;
  padding: 0;
  list-style: none;
}
.news li {
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: 0.98rem;
}
.news a.more {
  display: inline-block;
  margin-top: 14px;
  color: var(--teal);
  font-weight: 600;
}

.cta-final {
  text-align: center;
  padding: 72px 24px;
  border-radius: 20px;
  background:
    radial-gradient(ellipse at 50% 0%, #cfe9df 0%, transparent 60%),
    #fff;
  border: 1px solid var(--line);
}
.cta-final h2 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  letter-spacing: -0.04em;
}
.cta-final p {
  margin: 0 auto 24px;
  max-width: 28rem;
  color: var(--muted);
}
.cta-final .hero-actions { justify-content: center; }

.footer {
  padding: 40px 0 56px;
  border-top: 1px solid var(--line);
  margin-top: 40px;
  color: var(--muted);
  font-size: 0.88rem;
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 16px;
}
.footer a { color: var(--ink-soft); }
.footer a:hover { color: var(--teal); }
.footer-links { display: flex; gap: 16px; flex-wrap: wrap; }

/* inner pages */
.page-hero {
  padding: 48px 0 28px;
}
.page-hero h1 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  letter-spacing: -0.045em;
  line-height: 1.05;
}
.page-hero p {
  margin: 0;
  max-width: 40rem;
  color: var(--muted);
  font-size: 1.05rem;
}

.matrix {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
}
.matrix th, .matrix td {
  text-align: left;
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
  font-size: 0.92rem;
}
.matrix th {
  background: #f5faf7;
  color: var(--muted);
  font-weight: 600;
}
.matrix tr:last-child td { border-bottom: 0; }
.ok { color: var(--teal-deep); font-weight: 650; }

.arch {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  background: #14332c;
  color: #d7efe8;
  border-radius: 14px;
  padding: 22px;
  line-height: 1.8;
  overflow-x: auto;
}

.steps {
  display: grid;
  gap: 18px;
  counter-reset: step;
}
.step {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 16px;
  padding: 20px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
}
.step::before {
  counter-increment: step;
  content: counter(step);
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: var(--teal-wash);
  color: var(--teal-deep);
  display: grid;
  place-items: center;
  font-family: var(--font-display);
  font-weight: 700;
}
.step h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  letter-spacing: -0.02em;
}
.step p { margin: 0 0 12px; color: var(--muted); }
.step code, .guide-card code, .guide-list code {
  font-family: var(--font-mono);
  font-size: 0.86em;
  background: var(--teal-wash);
  color: var(--teal-deep);
  padding: 0.1em 0.35em;
  border-radius: 4px;
}
.step-note {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.6;
}
.guide-list {
  margin: 0 0 14px;
  padding-left: 1.2rem;
  color: var(--ink-soft);
  font-size: 0.95rem;
  line-height: 1.7;
}
.guide-list a { color: var(--teal); font-weight: 600; }
.guide-list a:hover { text-decoration: underline; }

.audience-switch {
  display: inline-flex;
  gap: 4px;
  padding: 4px;
  margin-bottom: 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
}
.audience-tab {
  min-height: 40px;
  padding: 0 16px;
  border: 0;
  border-radius: 9px;
  background: transparent;
  color: var(--ink-soft);
  font: inherit;
  font-weight: 600;
  font-size: 0.92rem;
  cursor: pointer;
}
.audience-tab:hover { color: var(--teal-deep); }
.audience-tab.is-active {
  background: var(--teal);
  color: #fff;
}
.audience-hint {
  margin: 0 0 22px;
  color: var(--muted);
  font-size: 0.95rem;
  max-width: 44rem;
  line-height: 1.6;
}
.audience-panel[hidden] { display: none !important; }
.audience-panel.is-active { display: block; }
.audience-panel .steps { counter-reset: step; }

.copy-prompt {
  margin-bottom: 22px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #fff;
}
.copy-prompt-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}
.copy-prompt-head h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}
.copy-prompt-head p {
  margin: 0;
  max-width: 40rem;
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.6;
}
.copy-prompt-body {
  max-height: min(52vh, 520px);
  overflow: auto;
  white-space: pre-wrap;
  word-break: break-word;
  margin: 0;
  user-select: text;
}
.copy-status {
  margin: 10px 0 0;
  color: var(--teal-deep);
  font-size: 0.9rem;
  font-weight: 600;
}
.ref-steps {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
  padding: 0 18px 18px;
}
.ref-steps summary {
  cursor: pointer;
  list-style: none;
  padding: 16px 0;
  font-family: var(--font-display);
  font-weight: 650;
  letter-spacing: -0.02em;
  color: var(--ink-soft);
}
.ref-steps summary::-webkit-details-marker { display: none; }
.ref-steps summary::after {
  content: "展开";
  float: right;
  color: var(--teal);
  font-size: 0.85rem;
  font-weight: 600;
}
.ref-steps[open] summary::after { content: "收起"; }
.ref-steps .steps { margin-top: 4px; }

.tunnel-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.guide-cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}
.guide-card {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
}
.guide-card h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 1.15rem;
  letter-spacing: -0.02em;
}
.guide-card p {
  margin: 0 0 12px;
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.65;
}
.guide-card ul {
  margin: 0;
  padding-left: 1.1rem;
  color: var(--ink-soft);
  font-size: 0.92rem;
  line-height: 1.7;
}
.guide-card a { color: var(--teal); font-weight: 600; }
.guide-card .code-block { margin: 0 0 12px; }

@media (max-width: 900px) {
  .tunnel-grid,
  .guide-cards { grid-template-columns: 1fr; }
}

.change {
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}
.change header {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: baseline;
  margin-bottom: 10px;
}
.change h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.35rem;
  letter-spacing: -0.02em;
}
.change time { color: var(--muted); font-size: 0.9rem; }
.change h4 {
  margin: 14px 0 8px;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}
.change ul {
  margin: 0;
  padding-left: 1.1rem;
  color: var(--ink-soft);
}

@keyframes rise {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: translateY(0); }
}

.split-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}

@media (max-width: 900px) {
  .nav-links { display: none; }
  .cap-grid { grid-template-columns: 1fr; }
  .install-band { grid-template-columns: 1fr; }
  .metric-row, .chart-row { grid-template-columns: 1fr 1fr; }
  .console-mock { grid-template-columns: 1fr; }
  .console-side { display: none; }
  .news { grid-template-columns: 1fr; }
  .split-2 { grid-template-columns: 1fr; gap: 40px; }
}

@media (max-width: 560px) {
  .wrap { width: calc(100% - 28px); }
  .hero { padding-top: 36px; }
  .metric-row, .chart-row { grid-template-columns: 1fr; }
  .section { padding: 64px 0; }
}