:root {
  color-scheme: light;
  --blue: #0b4fb3;
  --blue-dark: #073879;
  --blue-soft: #eef4ff;
  --copper: #a66f4c;
  --copper-dark: #7e5135;
  --copper-soft: #fff7f0;
  --teal: #277a78;
  --teal-dark: #155f5e;
  --teal-soft: #edf7f4;
  --deep: #0a2d36;
  --paper: #f8f6f0;
  --white: #ffffff;
  --soft: #f3f7f8;
  --ink: #182332;
  --muted: #5e6876;
  --line: #d9dfeb;
  --line-strong: #c4cedc;
  --shadow: 0 18px 44px rgba(20, 32, 48, 0.13);
  --shadow-soft: 0 8px 24px rgba(20, 32, 48, 0.08);
  --radius: 8px;
  --max: 1240px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

html,
body {
  margin: 0;
  padding: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  letter-spacing: 0;
}

body {
  min-height: 100vh;
}

body[data-language="en"] [data-lang="zh"],
body[data-language="zh"] [data-lang="en"] {
  display: none !important;
}

a {
  color: inherit;
}

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

::selection {
  background: rgba(11, 79, 179, 0.18);
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  font-size: 0.92em;
  overflow-wrap: anywhere;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(217, 223, 235, 0.86);
  background: rgba(248, 246, 240, 0.92);
  backdrop-filter: blur(14px);
  box-shadow: 0 8px 28px rgba(24, 35, 50, 0.06);
}

.nav {
  width: min(var(--max), calc(100% - 32px));
  min-height: 76px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
  color: var(--ink);
  font-weight: 850;
  text-decoration: none;
}

.brand-logo {
  width: 46px;
  height: 46px;
  flex: 0 0 auto;
  object-fit: contain;
  filter: drop-shadow(0 6px 12px rgba(24, 35, 50, 0.14));
}

.brand span {
  min-width: 0;
  font-size: 1.03rem;
  white-space: nowrap;
}

.nav-links {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
  flex-wrap: wrap;
  min-width: 0;
}

.nav-links a {
  padding: 8px 10px;
  border-radius: 6px;
  color: var(--muted);
  font-size: 0.94rem;
  font-weight: 750;
  text-decoration: none;
}

.nav-links a[aria-current="page"],
.nav-links a:hover {
  background: rgba(11, 79, 179, 0.08);
  color: var(--blue-dark);
}

.lang-switch {
  display: grid;
  grid-template-columns: 1fr 1fr;
  width: 124px;
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
}

.lang-switch button {
  min-height: 34px;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: 0.84rem;
  font-weight: 850;
  cursor: pointer;
}

body[data-language="en"] .lang-switch [data-set-lang="en"],
body[data-language="zh"] .lang-switch [data-set-lang="zh"] {
  background: var(--blue);
  color: var(--white);
}

.hero {
  position: relative;
  isolation: isolate;
  width: min(var(--max), calc(100% - 32px));
  min-height: 620px;
  margin: 16px auto 0;
  padding: 76px 40px 40px;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(340px, 0.82fr);
  gap: 36px;
  align-items: center;
  overflow: hidden;
  border: 1px solid rgba(217, 223, 235, 0.86);
  border-radius: var(--radius);
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.98) 0%, rgba(255, 255, 255, 0.93) 48%, rgba(255, 247, 240, 0.82) 100%),
    var(--white);
  box-shadow: var(--shadow-soft);
}

.hero::after {
  content: "";
  position: absolute;
  z-index: -1;
  right: -140px;
  bottom: -180px;
  width: 780px;
  max-width: 68vw;
  aspect-ratio: 4291 / 3392;
  background: url("../img/taffish-logo.webp") center / contain no-repeat;
  opacity: 0.1;
  pointer-events: none;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--teal);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1,
h2,
h3 {
  color: var(--ink);
  line-height: 1.12;
  letter-spacing: 0;
}

h1 {
  max-width: 980px;
  margin-bottom: 22px;
  font-size: 4.35rem;
  line-height: 1.02;
}

body[data-language="zh"] h1 {
  font-size: 3.85rem;
  line-height: 1.08;
}

h2 {
  margin-bottom: 16px;
  font-size: 2.2rem;
  line-height: 1.14;
}

h3 {
  margin-bottom: 10px;
  font-size: 1.08rem;
  line-height: 1.3;
}

.lead {
  max-width: 720px;
  margin-bottom: 0;
  color: #3c4654;
  font-size: 1.18rem;
}

.actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 28px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 18px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  background: var(--white);
  color: var(--ink);
  font-weight: 850;
  text-align: center;
  text-decoration: none;
  box-shadow: 0 8px 20px rgba(20, 32, 48, 0.06);
  transition: border-color 160ms ease, box-shadow 160ms ease, color 160ms ease, background 160ms ease, transform 160ms ease;
}

.button.primary {
  background: var(--blue);
  color: var(--white);
  border-color: var(--blue);
  box-shadow: 0 12px 26px rgba(11, 79, 179, 0.24);
}

.button:not(.primary) {
  border-color: var(--line);
}

.button:hover {
  transform: translateY(-1px);
  border-color: rgba(11, 79, 179, 0.32);
  box-shadow: 0 12px 28px rgba(20, 32, 48, 0.1);
}

.hero-panel,
.section-panel,
.callout {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.86);
  box-shadow: var(--shadow-soft);
}

.hero-panel {
  padding: 24px;
  width: min(100%, 520px);
  align-self: center;
  justify-self: end;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  backdrop-filter: blur(6px);
}

.route-mini {
  display: grid;
  gap: 12px;
  margin-top: 10px;
}

.route-line {
  display: grid;
  grid-template-columns: 132px minmax(0, 1fr);
  gap: 12px;
  align-items: stretch;
}

.route-label {
  display: flex;
  align-items: center;
  min-height: 50px;
  padding: 12px;
  border-radius: var(--radius);
  background: var(--blue);
  color: var(--white);
  font-weight: 900;
}

.route-label.secondary {
  background: var(--copper);
}

.route-label.denovo {
  background: var(--teal-dark);
}

.route-steps {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  min-width: 0;
}

.pill {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 6px 10px;
  border: 1px solid rgba(39, 122, 120, 0.18);
  border-radius: 999px;
  background: var(--teal-soft);
  color: var(--teal-dark);
  font-size: 0.9rem;
  font-weight: 800;
  white-space: nowrap;
}

.section {
  width: min(var(--max), calc(100% - 32px));
  margin: 0 auto;
  padding: 74px 0;
}

.section + .section {
  border-top: 1px solid rgba(217, 223, 235, 0.65);
}

.section-head {
  max-width: 980px;
  margin-bottom: 34px;
}

.section-head p,
.muted {
  color: var(--muted);
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

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

.card {
  min-height: 100%;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
  box-shadow: 0 12px 30px rgba(20, 32, 48, 0.08);
}

.card.accent {
  border-left: 5px solid var(--teal);
  background:
    linear-gradient(135deg, rgba(11, 79, 179, 0.04), rgba(39, 122, 120, 0.04)),
    var(--white);
}

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

.card h3 + p {
  margin-top: 8px;
}

.card ul {
  margin-bottom: 0;
  padding-left: 1.2rem;
  color: var(--muted);
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.stat {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
  box-shadow: 0 8px 24px rgba(20, 32, 48, 0.07);
}

.stat strong {
  display: block;
  color: var(--deep);
  font-size: 1.82rem;
  line-height: 1;
}

.stat span {
  display: block;
  margin-top: 8px;
  color: var(--muted);
  font-size: 0.93rem;
  font-weight: 760;
}

.plot-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.plot-card {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
  box-shadow: 0 12px 30px rgba(20, 32, 48, 0.08);
}

.plot-card img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: contain;
  background: var(--white);
  border-bottom: 1px solid var(--line);
}

.plot-card p {
  margin: 0;
  padding: 12px 14px;
  color: var(--muted);
  font-size: 0.94rem;
  font-weight: 760;
}

.flow-table {
  width: 100%;
  border-collapse: collapse;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
  box-shadow: 0 8px 24px rgba(20, 32, 48, 0.06);
}

.flow-table th,
.flow-table td {
  padding: 13px 14px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--line);
}

.flow-table th {
  background: #f3f7f8;
  color: var(--ink);
}

.flow-table tr:last-child td {
  border-bottom: 0;
}

.flow-map {
  display: grid;
  gap: 16px;
  margin-top: 22px;
}

.flow-lane {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(135deg, rgba(39, 122, 120, 0.06), rgba(11, 79, 179, 0.04)),
    #fbfdff;
}

.flow-lane.umbrella-lane {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(220px, 0.42fr);
  gap: 16px;
  align-items: stretch;
  background:
    linear-gradient(135deg, rgba(11, 79, 179, 0.08), rgba(166, 111, 76, 0.08)),
    var(--white);
}

.flow-lane-head {
  min-width: 0;
  margin-bottom: 14px;
}

.umbrella-lane .flow-lane-head {
  margin-bottom: 0;
}

.flow-lane-head strong {
  display: block;
  color: var(--deep);
  font-size: 1.02rem;
}

.flow-lane-head span {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-size: 0.94rem;
}

.flow-track {
  display: flex;
  align-items: stretch;
  flex-wrap: wrap;
  gap: 8px;
}

.flow-node {
  min-width: 126px;
  flex: 1 1 132px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
  box-shadow: 0 8px 22px rgba(20, 32, 48, 0.07);
}

.flow-node.main {
  border-color: rgba(39, 122, 120, 0.32);
  background: var(--teal-soft);
}

.flow-node.optional {
  border-color: rgba(166, 111, 76, 0.36);
  background: var(--copper-soft);
}

.flow-node.denovo {
  border-color: rgba(39, 122, 120, 0.38);
  background: #e7f5ef;
}

.flow-node.result,
.flow-node.umbrella {
  border-color: rgba(11, 79, 179, 0.28);
  background: var(--blue-soft);
}

.flow-node a {
  color: var(--ink);
  font-weight: 900;
  text-decoration: none;
  overflow-wrap: anywhere;
}

.flow-node a:hover {
  color: var(--blue-dark);
  text-decoration: underline;
  text-underline-offset: 0.18em;
}

.flow-node small {
  display: block;
  margin-top: 6px;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 800;
}

.flow-arrow {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 24px;
  color: var(--teal-dark);
  font-weight: 950;
}

.flow-arrow.split {
  color: var(--copper-dark);
}

.flow-detail-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 18px;
}

.flow-detail {
  min-width: 0;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(243, 247, 248, 0.68)),
    var(--white);
  box-shadow: 0 10px 24px rgba(20, 32, 48, 0.07);
}

.flow-detail header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.flow-detail h3 {
  margin-bottom: 0;
}

.flow-detail h3 a {
  color: var(--blue-dark);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
  overflow-wrap: anywhere;
}

.flow-detail p {
  color: var(--muted);
}

.flow-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.flow-links a,
.manual-link {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 6px 10px;
  border: 1px solid rgba(11, 79, 179, 0.18);
  border-radius: 6px;
  background: var(--white);
  color: var(--blue-dark);
  font-size: 0.86rem;
  font-weight: 850;
  text-decoration: none;
}

.flow-links a:hover,
.manual-link:hover {
  border-color: rgba(11, 79, 179, 0.36);
  background: var(--blue-soft);
}

.version-badge {
  flex: 0 0 auto;
  padding: 4px 8px;
  border: 1px solid rgba(11, 79, 179, 0.18);
  border-radius: 999px;
  background: var(--blue-soft);
  color: var(--blue-dark);
  font-size: 0.78rem;
  font-weight: 900;
  white-space: nowrap;
}

.route-choice {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin: 18px 0;
}

.route-choice > div {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--soft);
}

.manual-hero {
  background:
    linear-gradient(135deg, rgba(39, 122, 120, 0.07), rgba(11, 79, 179, 0.05)),
    var(--white);
}

.manual-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 18px 0 0;
}

.manual-meta span {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 5px 9px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--soft);
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 820;
}

.manual-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.manual-card {
  min-width: 0;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--soft);
}

.manual-card p,
.manual-card li {
  color: var(--muted);
}

.manual-card ul {
  margin-bottom: 0;
}

.manual-note {
  margin-top: 14px;
  padding: 13px 14px;
  border: 1px solid rgba(39, 122, 120, 0.2);
  border-radius: var(--radius);
  background: var(--teal-soft);
  color: #244848;
}

.manual-note p:last-child {
  margin-bottom: 0;
}

.field-table {
  margin: 14px 0 18px;
  overflow-x: auto;
}

.field-table .flow-table {
  min-width: 760px;
}

.param-name {
  width: 190px;
  color: var(--blue-dark);
  font-weight: 850;
  white-space: nowrap;
}

.param-kind {
  width: 130px;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 780;
}

.param-default {
  width: 150px;
  color: var(--muted);
  font-size: 0.9rem;
}

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

.mini-code-grid .code-block {
  padding: 16px;
}

.code-block {
  margin: 0;
  overflow-x: auto;
  padding: 22px;
  border-radius: var(--radius);
  background: #101820;
  color: #eaf2f1;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.06);
}

.code-block code {
  color: inherit;
  font-size: 0.95rem;
  line-height: 1.9;
  white-space: pre;
}

.page-layout {
  width: min(var(--max), calc(100% - 32px));
  margin: 0 auto;
  padding: 42px 0 74px;
  display: grid;
  grid-template-columns: 258px minmax(0, 1fr);
  gap: 30px;
}

.side-nav {
  position: sticky;
  top: 96px;
  align-self: start;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.82);
  box-shadow: var(--shadow-soft);
}

.side-nav a {
  display: block;
  padding: 9px 10px;
  border: 1px solid transparent;
  border-radius: 6px;
  color: var(--muted);
  font-size: 0.94rem;
  font-weight: 760;
  text-decoration: none;
}

.side-nav a:hover,
.side-nav a.active {
  background: var(--blue-soft);
  border-color: rgba(11, 79, 179, 0.18);
  color: var(--blue-dark);
}

.content {
  min-width: 0;
}

.article {
  margin-bottom: 18px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
  box-shadow: 0 10px 28px rgba(20, 32, 48, 0.07);
}

.article p:last-child,
.article ul:last-child {
  margin-bottom: 0;
}

.article ul {
  padding-left: 1.2rem;
}

.callout {
  padding: 16px;
  border-color: #efd2a2;
  background: var(--copper-soft);
  color: #65410b;
}

.footer {
  border-top: 1px solid var(--line);
  background: var(--white);
}

.footer-inner {
  width: min(var(--max), calc(100% - 32px));
  margin: 0 auto;
  padding: 28px 0;
  display: flex;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  color: var(--muted);
  font-size: 0.94rem;
}

.footer-inner a {
  color: var(--blue-dark);
  font-weight: 760;
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}

@media (max-width: 980px) {
  .hero {
    min-height: auto;
    padding: 52px 28px 30px;
    grid-template-columns: 1fr;
  }

  .hero::after {
    right: -190px;
    bottom: -190px;
    width: 620px;
    max-width: 90vw;
  }

  h1 {
    font-size: 3rem;
  }

  body[data-language="zh"] h1 {
    font-size: 2.75rem;
  }

  h2 {
    font-size: 1.9rem;
  }

  .grid,
  .grid.two,
  .plot-strip,
  .stat-grid,
  .flow-detail-grid,
  .route-choice,
  .mini-code-grid,
  .manual-grid {
    grid-template-columns: 1fr 1fr;
  }

  .flow-lane.umbrella-lane {
    grid-template-columns: 1fr;
  }

  .page-layout {
    grid-template-columns: 1fr;
  }

  .side-nav {
    position: static;
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
  }
}

@media (max-width: 700px) {
  .nav {
    min-height: auto;
    align-items: flex-start;
    flex-direction: column;
    padding: 14px 0;
  }

  .brand span {
    white-space: normal;
  }

  .nav-links {
    justify-content: flex-start;
  }

  .hero {
    width: min(100%, calc(100% - 20px));
    margin-top: 10px;
    padding: 40px 20px 24px;
  }

  .hero-panel {
    justify-self: stretch;
  }

  h1 {
    font-size: 2.32rem;
  }

  body[data-language="zh"] h1 {
    font-size: 2.12rem;
  }

  h2 {
    font-size: 1.55rem;
  }

  .lead {
    font-size: 1.04rem;
  }

  .route-line {
    grid-template-columns: 1fr;
  }

  .section {
    width: min(100%, calc(100% - 20px));
    padding: 52px 0;
  }

  .grid,
  .grid.two,
  .plot-strip,
  .stat-grid,
  .flow-detail-grid,
  .route-choice,
  .mini-code-grid,
  .manual-grid {
    grid-template-columns: 1fr;
  }

  .flow-lane {
    padding: 14px;
  }

  .flow-track {
    display: grid;
    grid-template-columns: 1fr;
  }

  .flow-node {
    min-width: 0;
  }

  .flow-arrow {
    min-height: 22px;
  }

  .page-layout {
    width: min(100%, calc(100% - 20px));
    padding-top: 24px;
  }

  .article {
    padding: 20px;
  }

  .flow-table {
    display: block;
    overflow-x: auto;
  }
}