:root {
  --bg: #f8fafc;
  --bg-soft: #eef7f5;
  --surface: rgba(255, 255, 255, .82);
  --surface-solid: #ffffff;
  --surface-2: #f1f5f9;
  --text: #111827;
  --muted: #617083;
  --line: rgba(15, 23, 42, .1);
  --line-strong: rgba(15, 23, 42, .16);
  --primary: #0f766e;
  --primary-strong: #0b5f59;
  --accent: #e86f2a;
  --accent-soft: #fff2e9;
  --blue: #2563eb;
  --green: #16a34a;
  --shadow: 0 24px 80px rgba(15, 23, 42, .12);
  --shadow-soft: 0 12px 38px rgba(15, 23, 42, .08);
  --header-bg: rgba(248, 250, 252, .82);
  --glass-bg: rgba(255, 255, 255, .58);
  --glass-line: rgba(255, 255, 255, .68);
  --code-bg: #0b1220;
  --code-surface: #111827;
  --code-line: rgba(255, 255, 255, .1);
  --code-text: #e5edf8;
}

html.dark,
body[theme-mode="dark"] {
  --bg: #0b0f14;
  --bg-soft: #0f1b1c;
  --surface: rgba(19, 25, 32, .78);
  --surface-solid: #131920;
  --surface-2: #18212b;
  --text: #f3f7fb;
  --muted: #9facba;
  --line: rgba(226, 232, 240, .1);
  --line-strong: rgba(226, 232, 240, .18);
  --primary: #4fd1c5;
  --primary-strong: #83e5dc;
  --accent: #ff9a56;
  --accent-soft: rgba(255, 154, 86, .12);
  --blue: #7db7ff;
  --green: #64d98a;
  --shadow: 0 28px 90px rgba(0, 0, 0, .48);
  --shadow-soft: 0 16px 46px rgba(0, 0, 0, .34);
  --header-bg: rgba(11, 15, 20, .78);
  --glass-bg: rgba(19, 25, 32, .52);
  --glass-line: rgba(226, 232, 240, .14);
  --code-bg: #05080d;
  --code-surface: #0d131b;
  --code-line: rgba(226, 232, 240, .12);
  --code-text: #edf5ff;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  position: relative;
  margin: 0;
  background:
    radial-gradient(circle at top left, rgba(79, 209, 197, .18), transparent 34rem),
    radial-gradient(circle at top right, rgba(232, 111, 42, .13), transparent 30rem),
    var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", Arial, sans-serif;
  font-size: 15px;
  line-height: 1.6;
  letter-spacing: 0;
}

.ambient-scene {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
}

.mesh {
  position: absolute;
  width: 58vw;
  height: 58vw;
  opacity: .38;
  filter: blur(28px);
  transform: translate3d(0, 0, 0);
}

.mesh-a {
  top: -22vw;
  left: -18vw;
  background: conic-gradient(from 120deg, rgba(15, 118, 110, .36), rgba(37, 99, 235, .2), rgba(232, 111, 42, .24), rgba(15, 118, 110, .36));
}

.mesh-b {
  right: -24vw;
  bottom: -28vw;
  background: conic-gradient(from 20deg, rgba(232, 111, 42, .22), rgba(22, 163, 74, .18), rgba(37, 99, 235, .24), rgba(232, 111, 42, .22));
}

.grid-plane {
  position: absolute;
  inset: 0;
  opacity: .18;
  background-image:
    linear-gradient(to right, var(--line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--line) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, .78), transparent 76%);
}

body[theme-mode="dark"] {
  color-scheme: dark;
}

a {
  color: inherit;
  text-decoration: none;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 68px;
  padding: 10px max(20px, calc((100vw - 1180px) / 2));
  border-bottom: 1px solid rgba(255, 255, 255, .32);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, .68), rgba(255, 255, 255, .4)),
    var(--header-bg);
  backdrop-filter: saturate(130%) blur(10px);
}

body[theme-mode="dark"] .site-header {
  border-bottom-color: rgba(226, 232, 240, .1);
  background:
    linear-gradient(180deg, rgba(19, 25, 32, .68), rgba(19, 25, 32, .38)),
    var(--header-bg);
}

.site-header > * {
  min-width: 0;
}

.brand,
.nav-links,
.header-tools,
.hero-actions,
.hero-metrics,
.site-footer {
  display: flex;
  align-items: center;
}

.brand {
  gap: 10px;
  font-weight: 850;
}

.brand-mark {
  width: 36px;
  height: 36px;
  border-radius: 9px;
  object-fit: contain;
  box-shadow: 0 6px 18px rgba(15, 118, 110, .18);
}

.brand-text {
  font-size: 19px;
}

.nav-links {
  position: relative;
  gap: 6px;
  min-height: 42px;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
  box-shadow: var(--shadow-soft);
  backdrop-filter: saturate(120%) blur(8px);
  color: var(--muted);
  font-size: 13px;
  font-weight: 740;
}

body[theme-mode="dark"] .nav-links {
  box-shadow: var(--shadow-soft);
}

.nav-glow {
  position: absolute;
  inset: 4px auto 4px 4px;
  width: var(--nav-glow-width, 96px);
  border-radius: 9px;
  background: rgba(15, 118, 110, .1);
  box-shadow: inset 0 0 0 1px rgba(15, 118, 110, .16);
  opacity: 0;
  transform: translateX(var(--nav-glow-x, 0));
  transition: transform .24s ease, width .24s ease, opacity .18s ease;
  pointer-events: none;
}

.nav-action {
  position: relative;
  overflow: hidden;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 34px;
  min-width: 74px;
  border-radius: 9px;
  border: 0;
  background: transparent;
  color: inherit;
  font: inherit;
  cursor: pointer;
  padding: 0 11px;
  white-space: nowrap;
  transform: translateZ(0);
  transition: color .18s ease, transform .18s ease, background .18s ease;
}

.nav-action:after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 6px;
  width: 4px;
  height: 4px;
  border-radius: 999px;
  background: var(--primary);
  opacity: 0;
  transform: translate(-50%, 5px) scale(.5);
  transition: opacity .2s ease, transform .2s ease;
}

.nav-links:hover .nav-glow,
.nav-links:focus-within .nav-glow {
  opacity: 1;
}

.nav-action:hover,
.nav-action:focus-visible {
  color: var(--primary-strong);
  transform: translateY(-1px);
}

.nav-action:hover:after,
.nav-action:focus-visible:after {
  opacity: 1;
  transform: translate(-50%, 0) scale(1);
}

.nav-action:active {
  transform: translateY(1px) scale(.98);
}

.nav-links a,
.nav-action,
.text-link,
.site-footer a {
  transition: color .18s ease;
}

.nav-links a:hover,
.nav-action:hover,
.nav-action:focus-visible,
.text-link:hover,
.site-footer a:hover {
  color: var(--primary);
}

.header-tools {
  flex: 0 1 auto;
  justify-content: flex-end;
  gap: 8px;
  min-width: 0;
}

.tool-button,
.header-action,
.button {
  position: relative;
  overflow: hidden;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  border-radius: 8px;
  font: inherit;
  font-size: 14px;
  font-weight: 760;
  white-space: nowrap;
  transition: transform .2s ease, border-color .2s ease, background .2s ease, box-shadow .2s ease, color .2s ease;
}

.tool-button {
  padding: 0 12px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
}

.icon-button {
  width: 40px;
  padding: 0;
  font-size: 18px;
}

.header-action,
.button.primary {
  border: 1px solid transparent;
  background: var(--primary);
  color: #ffffff;
}

body[theme-mode="dark"] .header-action,
body[theme-mode="dark"] .button.primary {
  color: #061014;
}

.site-header .header-action {
  min-width: 0;
  max-width: 104px;
  padding: 0 13px;
  text-overflow: ellipsis;
}

.site-header .header-action:after {
  content: none;
}

.site-header .secondary-action {
  border-color: var(--line);
  background: var(--surface);
  color: var(--text);
}

body[theme-mode="dark"] .site-header .secondary-action {
  color: var(--text);
}

.secondary-action,
.button.neutral,
.button.ghost {
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--text);
}

.button.ghost {
  background: transparent;
}

.button {
  min-height: 46px;
  padding: 0 18px;
}

.animated-button {
  gap: 10px;
}

.animated-button:before,
.header-action:before,
.tool-button:before,
.model-preview-action:before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(110deg, transparent 0%, rgba(255, 255, 255, .28) 45%, transparent 70%);
  transform: translateX(-120%);
  transition: transform .55s ease;
  pointer-events: none;
}

.animated-button:after,
.header-action:after,
.model-preview-action:after,
.animated-link:after {
  content: "→";
  display: inline-flex;
  margin-left: 8px;
  transition: transform .2s ease;
}

.tool-button:hover,
.header-action:hover,
.button:hover,
.model-preview-action:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 34px rgba(15, 118, 110, .18);
}

.animated-button:hover:before,
.header-action:hover:before,
.tool-button:hover:before,
.model-preview-action:hover:before {
  transform: translateX(120%);
}

.animated-button:hover:after,
.header-action:hover:after,
.model-preview-action:hover:after,
.animated-link:hover:after {
  transform: translateX(4px);
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(380px, .86fr);
  gap: 42px;
  align-items: center;
  max-width: 1180px;
  min-height: 0;
  margin: 0 auto;
  padding: 48px 20px 42px;
}

.hero:before {
  content: "";
  position: absolute;
  inset: 24px 20px auto;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--line-strong), transparent);
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 850;
  letter-spacing: .1em;
  text-transform: uppercase;
}

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

h1 {
  max-width: 780px;
  margin-bottom: 18px;
  font-size: clamp(42px, 5.4vw, 68px);
  line-height: 1.04;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 14px;
  font-size: clamp(30px, 3.5vw, 46px);
  line-height: 1.14;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  font-size: 18px;
  line-height: 1.28;
}

.hero-lead,
.section-head p,
.section-copy p {
  max-width: 720px;
  color: var(--muted);
  font-size: 18px;
}

.hero-actions {
  flex-wrap: wrap;
  gap: 12px;
  margin: 26px 0 18px;
}

.hero-metrics {
  flex-wrap: wrap;
  gap: 10px;
}

.hero-metrics span {
  display: grid;
  gap: 1px;
  min-width: 142px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow-soft);
}

.hero-metrics strong {
  font-size: 14px;
}

.hero-metrics em {
  color: var(--muted);
  font-size: 12px;
  font-style: normal;
}

.visual-shell {
  position: relative;
  min-height: 500px;
  perspective: 1200px;
}

.console-panel {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--code-line);
  border-radius: 16px;
  background: var(--code-bg);
  color: var(--code-text);
  box-shadow: var(--shadow);
  transition: transform .2s ease, box-shadow .2s ease;
}

.console-panel:before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(115deg, rgba(255, 255, 255, .18), transparent 30%, transparent 68%, rgba(79, 209, 197, .1)),
    radial-gradient(circle at 20% 0, rgba(79, 209, 197, .22), transparent 34%),
    radial-gradient(circle at 90% 110%, rgba(232, 111, 42, .16), transparent 30%);
  pointer-events: none;
}

.panel-header {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 14px;
  align-items: center;
  min-height: 52px;
  padding: 0 18px;
  border-bottom: 1px solid var(--code-line);
}

.traffic-lights {
  display: flex;
  gap: 7px;
}

.traffic-lights span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #64748b;
}

.traffic-lights span:first-child {
  background: #f15f5a;
}

.traffic-lights span:nth-child(2) {
  background: #f2bd4b;
}

.traffic-lights span:nth-child(3) {
  background: #37c76f;
}

.panel-header strong {
  font-size: 13px;
}

.panel-header small {
  color: #9fb0c2;
  font-size: 12px;
}

.endpoint-stack {
  position: relative;
  display: grid;
  gap: 10px;
  padding: 18px;
}

.endpoint-row {
  display: grid;
  gap: 5px;
  width: 100%;
  padding: 14px;
  border: 1px solid var(--code-line);
  border-radius: 10px;
  background: var(--code-surface);
  color: var(--code-text);
  text-align: left;
}

button.endpoint-row {
  cursor: pointer;
}

.endpoint-row:hover {
  border-color: rgba(79, 209, 197, .38);
  background: rgba(17, 24, 39, .86);
}

.endpoint-row span {
  color: #9fb0c2;
  font-size: 12px;
  font-weight: 720;
}

code,
pre {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

.endpoint-row code {
  overflow-wrap: anywhere;
  font-size: 14px;
}

.request-card {
  position: relative;
  margin: 0 18px 18px;
  border: 1px solid var(--code-line);
  border-radius: 12px;
  background: rgba(255, 255, 255, .03);
}

.request-line {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 14px;
  border-bottom: 1px solid var(--code-line);
  color: #cbd8e6;
  font-size: 13px;
}

.status-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: #f2bd4b;
}

.status-dot.ok {
  background: #37c76f;
}

.status-dot.warn {
  background: #f15f5a;
}

pre {
  overflow-x: auto;
  margin: 0;
  padding: 14px;
  color: #dce9f7;
  font-size: 12px;
  line-height: 1.7;
}

.flow-lines {
  position: absolute;
  inset: auto 18px 18px;
  height: 2px;
  overflow: hidden;
}

.flow-lines span {
  position: absolute;
  width: 36%;
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, transparent, var(--primary), transparent);
  opacity: .72;
}

.flow-lines span:nth-child(2) {
  left: 32%;
}

.flow-lines span:nth-child(3) {
  left: 64%;
}

.floating-card {
  position: absolute;
  z-index: 3;
  display: grid;
  gap: 6px;
  min-width: 188px;
  padding: 16px;
  border: 1px solid var(--glass-line);
  border-radius: 14px;
  background: var(--glass-bg);
  box-shadow: var(--shadow-soft);
  backdrop-filter: saturate(120%) blur(8px);
}

.floating-card span {
  color: var(--muted);
  font-size: 12px;
  font-weight: 820;
}

.floating-card strong {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
}

.route-card {
  top: 22px;
  right: -14px;
}

.latency-card {
  left: -12px;
  bottom: 42px;
}

.latency-card i {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 6px rgba(22, 163, 74, .14);
}

.latency-card em {
  font-style: normal;
}

.section {
  max-width: 1180px;
  margin: 0 auto;
  padding: 78px 20px;
}

.announcement-section {
  padding-top: 0;
  padding-bottom: 22px;
}

.announcement-card {
  position: relative;
  overflow: hidden;
  display: grid;
  gap: 22px;
  border: 1px solid var(--glass-line);
  border-radius: 18px;
  background:
    linear-gradient(135deg, rgba(15, 118, 110, .1), transparent 34%, rgba(232, 111, 42, .08)),
    var(--glass-bg);
  box-shadow: var(--shadow-soft);
  backdrop-filter: saturate(120%) blur(8px);
  padding: 28px;
}

.announcement-main,
.announcement-limit,
.announcement-notes,
.announcement-support {
  position: relative;
}

.announcement-badge {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  margin-bottom: 14px;
  padding: 0 12px;
  border: 1px solid rgba(37, 99, 235, .2);
  border-radius: 999px;
  background: rgba(37, 99, 235, .1);
  color: var(--blue);
  font-size: 13px;
  font-weight: 850;
}

.announcement-main h2 {
  margin-bottom: 12px;
  font-size: clamp(28px, 3.2vw, 42px);
}

.announcement-main p {
  max-width: 860px;
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 17px;
}

.announcement-main .announcement-en {
  color: var(--muted);
}

.announcement-limit {
  display: grid;
  gap: 4px;
  padding: 16px 18px;
  border: 1px solid rgba(220, 38, 38, .24);
  border-radius: 12px;
  background: rgba(220, 38, 38, .08);
  color: #b91c1c;
}

body[theme-mode="dark"] .announcement-limit {
  color: #fecaca;
  background: rgba(127, 29, 29, .2);
  border-color: rgba(248, 113, 113, .28);
}

.announcement-limit strong,
.announcement-limit span {
  font-size: 17px;
  line-height: 1.55;
}

.announcement-notes {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255, 255, 255, .42);
}

body[theme-mode="dark"] .announcement-notes {
  background: rgba(5, 8, 13, .2);
}

.announcement-notes h3 {
  margin-bottom: 12px;
}

.announcement-notes ol {
  display: grid;
  gap: 12px;
  margin: 0;
  padding-left: 20px;
}

.announcement-notes li {
  padding-left: 4px;
  color: var(--text);
}

.announcement-notes li::marker {
  color: var(--primary);
  font-weight: 850;
}

.announcement-notes span,
.announcement-notes em {
  display: block;
  line-height: 1.75;
}

.announcement-notes em {
  color: var(--muted);
  font-style: normal;
}

.announcement-support {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  color: var(--muted);
}

.announcement-support strong {
  color: var(--text);
}

.agreement-links {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
}

.agreement-links button {
  display: grid;
  gap: 6px;
  min-height: 112px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: rgba(255, 255, 255, .4);
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
  transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease;
}

body[theme-mode="dark"] .agreement-links button {
  background: rgba(5, 8, 13, .22);
}

.agreement-links button:hover,
.agreement-links button:focus-visible {
  transform: translateY(-2px);
  border-color: var(--line-strong);
  box-shadow: var(--shadow-soft);
}

.agreement-links span {
  color: var(--primary);
  font-size: 13px;
  font-weight: 850;
}

.agreement-links strong {
  align-self: end;
  line-height: 1.35;
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: grid;
  place-items: center;
  padding: 24px;
  background: rgba(3, 7, 18, .56);
  backdrop-filter: blur(16px);
}

.modal-backdrop[hidden] {
  display: none;
}

.modal-panel {
  position: relative;
  overflow: auto;
  width: min(920px, 100%);
  max-height: min(84svh, 820px);
  border: 1px solid var(--glass-line);
  border-radius: 18px;
  background: var(--surface-solid);
  box-shadow: 0 34px 110px rgba(0, 0, 0, .34);
  padding: 28px;
}

.modal-close {
  position: sticky;
  top: 0;
  float: right;
  z-index: 2;
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  margin: -8px -8px 0 12px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: var(--surface);
  color: var(--text);
  font-size: 24px;
  line-height: 1;
  cursor: pointer;
}

.modal-close:hover,
.modal-close:focus-visible {
  color: var(--primary);
  border-color: var(--line-strong);
}

.modal-head {
  max-width: 760px;
  margin-bottom: 22px;
}

.modal-head h2 {
  margin-bottom: 10px;
}

.modal-head p:last-child {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 16px;
}

.modal-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 18px;
  padding: 6px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
}

.modal-tabs button {
  min-height: 38px;
  padding: 0 14px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: 14px;
  font-weight: 800;
  cursor: pointer;
}

.modal-tabs button.active,
.modal-tabs button:hover,
.modal-tabs button:focus-visible {
  background: var(--primary);
  color: #fff;
}

body[theme-mode="dark"] .modal-tabs button.active,
body[theme-mode="dark"] .modal-tabs button:hover,
body[theme-mode="dark"] .modal-tabs button:focus-visible {
  color: #061014;
}

.tab-panel {
  display: none;
}

.tab-panel.active {
  display: block;
}

.guide-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.guide-grid article,
.modal-note {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
  box-shadow: var(--shadow-soft);
}

.guide-grid article {
  padding: 18px;
}

.guide-grid article > span {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  margin-bottom: 14px;
  border-radius: 9px;
  background: var(--primary);
  color: #fff;
  font-weight: 850;
}

body[theme-mode="dark"] .guide-grid article > span {
  color: #061014;
}

.guide-grid p,
.modal-note p {
  margin-bottom: 8px;
  color: var(--muted);
}

.guide-grid p:last-child,
.modal-note p:last-child {
  margin-bottom: 0;
}

.modal-note {
  margin-top: 12px;
  padding: 18px;
}

.modal-note strong {
  display: block;
  margin-bottom: 8px;
}

.policy-stack {
  display: grid;
  gap: 12px;
}

.policy-tabs {
  position: sticky;
  top: 0;
  z-index: 3;
  margin-bottom: 14px;
}

.policy-tab-content {
  min-height: 300px;
}

.policy-stack article,
.workbench-grid a {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
  box-shadow: var(--shadow-soft);
}

.policy-stack article {
  padding: 20px;
}

.policy-stack article.tab-panel {
  padding: 22px;
}

.policy-stack h3 {
  margin-bottom: 12px;
}

.policy-stack p {
  margin-bottom: 8px;
  color: var(--muted);
}

.policy-stack p:last-child {
  margin-bottom: 0;
}

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

.workbench-grid a {
  position: relative;
  overflow: hidden;
  display: grid;
  gap: 12px;
  min-height: 168px;
  padding: 22px;
  transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease;
}

.workbench-grid a:after {
  content: "→";
  position: absolute;
  right: 22px;
  bottom: 18px;
  color: var(--primary);
  font-size: 22px;
  transition: transform .2s ease;
}

.workbench-grid a:hover,
.workbench-grid a:focus-visible {
  transform: translateY(-3px);
  border-color: var(--line-strong);
  box-shadow: var(--shadow);
}

.workbench-grid a:hover:after,
.workbench-grid a:focus-visible:after {
  transform: translateX(4px);
}

.workbench-grid span {
  color: var(--primary);
  font-size: 14px;
  font-weight: 850;
}

.workbench-grid strong {
  max-width: 280px;
  font-size: 20px;
  line-height: 1.35;
}

.product-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  padding-top: 24px;
}

.model-preview {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 24px;
  align-items: center;
  overflow: hidden;
  margin-top: 12px;
  border: 1px solid var(--glass-line);
  border-radius: 18px;
  background: var(--glass-bg);
  box-shadow: var(--shadow-soft);
  backdrop-filter: saturate(120%) blur(8px);
}

.model-preview p {
  max-width: 720px;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 17px;
}

.model-preview-action {
  position: relative;
  overflow: hidden;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 16px;
  border-radius: 8px;
  background: var(--primary);
  color: #fff;
  font-weight: 820;
  white-space: nowrap;
}

body[theme-mode="dark"] .model-preview-action {
  color: #061014;
}

.model-marquee {
  grid-column: 1 / -1;
  overflow: hidden;
  margin: 2px -20px -42px;
  padding: 18px 0;
  border-top: 1px solid var(--line);
  mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
}

.marquee-track {
  display: flex;
  width: max-content;
  gap: 10px;
}

.marquee-track span {
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  color: var(--muted);
  font-size: 13px;
  font-weight: 760;
}

.product-strip a,
.feature-grid article,
.trust-grid article,
.docs-row a,
.billing-board,
.steps div {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
  box-shadow: var(--shadow-soft);
}

.product-strip a {
  position: relative;
  overflow: hidden;
  display: grid;
  gap: 8px;
  padding: 20px;
  transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease;
}

.product-strip a:after,
.docs-row a:after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(79, 209, 197, .14), transparent 44%, rgba(232, 111, 42, .1));
  opacity: 0;
  transition: opacity .2s ease;
  pointer-events: none;
}

.product-strip a:hover,
.docs-row a:hover,
.feature-grid article:hover,
.trust-grid article:hover {
  transform: translateY(-3px);
  border-color: var(--line-strong);
  box-shadow: var(--shadow);
}

.product-strip a:hover:after,
.docs-row a:hover:after {
  opacity: 1;
}

.product-strip span,
.docs-row span,
.text-link {
  color: var(--primary);
  font-size: 13px;
  font-weight: 850;
}

.product-strip strong {
  font-size: 17px;
  line-height: 1.35;
}

.section-head {
  max-width: 760px;
  margin-bottom: 30px;
}

.feature-grid,
.trust-grid,
.docs-row {
  display: grid;
  gap: 14px;
}

.feature-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.feature-grid article {
  min-height: 224px;
  padding: 22px;
  transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease;
}

.feature-icon {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  margin-bottom: 18px;
  border-radius: 9px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 13px;
  font-weight: 850;
}

.feature-grid p,
.trust-grid p {
  margin: 0;
  color: var(--muted);
}

.split-section {
  display: grid;
  grid-template-columns: minmax(0, .92fr) minmax(360px, .8fr);
  gap: 48px;
  align-items: center;
}

.text-link {
  display: inline-flex;
  margin-top: 8px;
}

.billing-board {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  overflow: hidden;
  padding: 1px;
  background: var(--line);
}

.billing-board div {
  display: grid;
  gap: 7px;
  min-height: 132px;
  padding: 20px;
  background: var(--surface-solid);
}

.billing-board span {
  color: var(--muted);
  font-size: 13px;
  font-weight: 760;
}

.billing-board strong {
  align-self: end;
  font-size: 20px;
  line-height: 1.25;
}

.security-band {
  background:
    linear-gradient(135deg, rgba(15, 118, 110, .13), rgba(37, 99, 235, .08)),
    var(--bg-soft);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.security-inner {
  max-width: 1180px;
}

.trust-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.trust-grid article {
  padding: 22px;
  transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease;
}

.workflow-section {
  padding-bottom: 44px;
}

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

.steps div {
  display: grid;
  align-content: start;
  gap: 14px;
  min-height: 244px;
  padding: 20px;
}

.steps span {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 9px;
  background: var(--primary);
  color: #fff;
  font-weight: 850;
}

body[theme-mode="dark"] .steps span {
  color: #061014;
}

.steps strong {
  line-height: 1.35;
}

.steps p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.75;
}

.docs-row {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  padding-top: 0;
}

.docs-row a {
  position: relative;
  overflow: hidden;
  display: grid;
  gap: 8px;
  padding: 20px;
  transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease;
}

.docs-row strong {
  font-size: 18px;
}

.site-footer {
  justify-content: center;
  flex-wrap: wrap;
  gap: 18px;
  padding: 28px 20px 36px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

@media (max-width: 980px) {
  .nav-links {
    display: none;
  }

  .hero,
  .split-section {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: 0;
    padding-top: 38px;
    padding-bottom: 34px;
    gap: 28px;
  }

  .visual-shell {
    min-height: 450px;
  }

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

@media (max-width: 720px) {
  .site-header {
    min-height: 62px;
    padding: 10px 14px;
  }

  .brand-text {
    display: none;
  }

  .secondary-action {
    display: none;
  }

  .tool-button,
  .header-action {
    min-height: 36px;
    padding: 0 11px;
    font-size: 13px;
  }

  .site-header .header-action {
    max-width: 76px;
    padding: 0 10px;
  }

  .icon-button {
    width: 36px;
    padding: 0;
  }

  h1 {
    font-size: 38px;
  }

  .hero-lead,
  .section-head p,
  .section-copy p {
    font-size: 16px;
  }

  .product-strip,
  .model-preview,
  .feature-grid,
  .trust-grid,
  .docs-row,
  .agreement-links,
  .workbench-grid,
  .guide-grid,
  .steps,
  .billing-board {
    grid-template-columns: 1fr;
  }

  .announcement-card {
    padding: 22px;
  }

  .modal-backdrop {
    padding: 12px;
  }

  .modal-panel {
    padding: 22px;
    max-height: 88svh;
  }

  .console-panel {
    border-radius: 12px;
  }

  .visual-shell {
    min-height: 0;
  }

  .floating-card {
    position: relative;
    inset: auto;
    margin-bottom: 12px;
  }

  .latency-card {
    margin: 12px 0 0;
  }

  .model-preview {
    padding-top: 42px;
  }

  .model-preview-action {
    justify-self: start;
  }

  .panel-header {
    grid-template-columns: auto 1fr;
  }

  .panel-header small {
    grid-column: 1 / -1;
    padding-bottom: 12px;
  }

  .feature-grid article,
  .steps div {
    min-height: auto;
  }
}

@media (max-width: 420px) {
  #languageToggle {
    max-width: 70px;
  }

  .header-tools {
    gap: 6px;
  }

  .header-action {
    padding: 0 10px;
  }

  .site-header .secondary-action {
    display: none;
  }

  .site-header .header-action {
    max-width: 52px;
  }

  .site-header .register-action {
    color: transparent;
  }

  .site-header .register-action:after {
    content: "注册";
    position: absolute;
    inset: 0;
    display: grid;
    place-items: center;
    color: #fff;
    transform: none;
    background: transparent;
    margin: 0;
  }

  body[theme-mode="dark"] .site-header .register-action:after {
    color: #061014;
  }
}

@keyframes meshDrift {
  from {
    transform: translate3d(-2%, -1%, 0) rotate(0deg) scale(1);
  }
  to {
    transform: translate3d(4%, 3%, 0) rotate(12deg) scale(1.04);
  }
}

@keyframes gridSlide {
  from {
    background-position: 0 0;
  }
  to {
    background-position: 64px 64px;
  }
}

@keyframes panelSweep {
  0%, 55% {
    transform: translateX(-190px) skewX(-14deg);
  }
  78%, 100% {
    transform: translateX(620px) skewX(-14deg);
  }
}

@keyframes dataFlow {
  from {
    transform: translateX(-40%);
    opacity: 0;
  }
  18%, 72% {
    opacity: .9;
  }
  to {
    transform: translateX(300%);
    opacity: 0;
  }
}

@keyframes floatCard {
  from, to {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

@keyframes marquee {
  from {
    transform: translateX(0);
  }
  to {
    transform: translateX(-50%);
  }
}

@keyframes announcementSweep {
  0%, 62% {
    transform: translateX(-120%);
  }
  84%, 100% {
    transform: translateX(120%);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *:before,
  *:after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: .001ms !important;
  }
}

@media (max-width: 900px), (pointer: coarse) {
  .ambient-scene {
    display: none;
  }

  .site-header,
  .nav-links,
  .floating-card,
  .announcement-card,
  .model-preview {
    backdrop-filter: none;
  }

  .console-panel:after,
  .announcement-card:before,
  .marquee-track {
    animation: none;
  }

  .floating-card {
    display: none;
  }

  .visual-shell {
    min-height: auto;
  }
}