/* =========================================================
   KUIXI — Design System
   Dark · Technical · Precise
   ========================================================= */

/* ---------- 1. Tokens ---------- */
:root {
  --bg: #04050a;
  --bg-2: #070912;
  --panel: rgba(255, 255, 255, 0.032);
  --panel-hi: rgba(255, 255, 255, 0.06);
  --line: rgba(255, 255, 255, 0.075);
  --line-hi: rgba(255, 255, 255, 0.16);

  --text: #e9ebf3;
  --text-2: #a7adc3;
  --text-3: #6b7189;

  --indigo: #6366f1;
  --blue: #4f8bf9;
  --cyan: #22d3ee;
  --violet: #a78bfa;
  --green: #34d399;
  --amber: #fbbf24;

  --grad: linear-gradient(115deg, #6366f1 0%, #4f8bf9 46%, #22d3ee 100%);
  --grad-v: linear-gradient(150deg, #a78bfa, #6366f1);
  --grad-text: linear-gradient(100deg, #c7d2fe 0%, #a5b4fc 30%, #67e8f9 100%);

  --r-xs: 8px;
  --r-sm: 12px;
  --r: 18px;
  --r-lg: 26px;

  --maxw: 1180px;
  --nav-h: 74px;

  --font: "Inter", "SF Pro Text", -apple-system, BlinkMacSystemFont, "Segoe UI",
    "PingFang SC", "HarmonyOS Sans SC", "Hiragino Sans GB", "Microsoft YaHei",
    system-ui, sans-serif;
  --mono: "JetBrains Mono", "SF Mono", ui-monospace, "Cascadia Code", Consolas,
    "Liberation Mono", monospace;

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

/* ---------- 2. Reset ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}
html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 20px);
}
body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
img,
svg,
video {
  display: block;
  max-width: 100%;
}
a {
  color: inherit;
  text-decoration: none;
}
button,
input,
select,
textarea {
  font: inherit;
  color: inherit;
}
h1,
h2,
h3,
h4,
p {
  margin: 0;
}
ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}
::selection {
  background: rgba(99, 102, 241, 0.35);
  color: #fff;
}

/* ---------- 3. Background ---------- */
.bg {
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  overflow: hidden;
}
.bg::before {
  content: "";
  position: absolute;
  inset: -20%;
  background:
    radial-gradient(46rem 34rem at 12% -6%, rgba(99, 102, 241, 0.2), transparent 62%),
    radial-gradient(40rem 30rem at 88% -2%, rgba(34, 211, 238, 0.13), transparent 60%),
    radial-gradient(44rem 36rem at 50% 108%, rgba(167, 139, 250, 0.1), transparent 62%);
  filter: blur(10px);
}
.bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(255, 255, 255, 0.028) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.028) 1px, transparent 1px);
  background-size: 74px 74px;
  mask-image: radial-gradient(ellipse 120% 80% at 50% 0%, #000 25%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse 120% 80% at 50% 0%, #000 25%, transparent 78%);
}
.grain {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: 0.028;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ---------- 4. Layout ---------- */
.container {
  width: min(100% - 44px, var(--maxw));
  margin-inline: auto;
}
.section {
  padding: 90px 0;
  position: relative;
}
.section-sm {
  padding: 56px 0;
}
.section-line {
  border-top: 1px solid var(--line);
}
.stack {
  display: flex;
  flex-direction: column;
}

/* ---------- 5. Typography ---------- */
.display {
  font-size: clamp(2rem, 5.6vw, 4rem);
  line-height: 1.06;
  letter-spacing: -0.035em;
  font-weight: 620;
}
.h2 {
  font-size: clamp(1.7rem, 3.2vw, 2.5rem);
  line-height: 1.16;
  letter-spacing: -0.02em;
  font-weight: 600;
}
.h3 {
  font-size: 1.16rem;
  line-height: 1.4;
  letter-spacing: -0.01em;
  font-weight: 560;
}
.lead {
  font-size: clamp(1rem, 1.5vw, 1.14rem);
  color: var(--text-2);
  line-height: 1.75;
}
.muted {
  color: var(--text-3);
}
.grad-text {
  background: var(--grad-text);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-3);
}
.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: linear-gradient(90deg, var(--indigo), transparent);
}

/* ---------- 6. Nav ---------- */
.nav {
  position: fixed;
  inset: 0 0 auto 0;
  height: var(--nav-h);
  z-index: 100;
  display: flex;
  align-items: center;
  transition: background 0.35s var(--ease), border-color 0.35s var(--ease),
    backdrop-filter 0.35s var(--ease);
  border-bottom: 1px solid transparent;
}
.nav.is-stuck {
  background: rgba(5, 6, 12, 0.72);
  backdrop-filter: blur(18px) saturate(160%);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  border-bottom-color: var(--line);
}
.nav-inner {
  width: min(100% - 44px, var(--maxw));
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 640;
  letter-spacing: 0.14em;
  font-size: 0.86rem;
}
.brand-mark {
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  border-radius: 9px;
  background: var(--grad);
  color: #04050a;
  font-size: 0.85rem;
  font-weight: 800;
  letter-spacing: 0;
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.12) inset,
    0 8px 24px -8px rgba(99, 102, 241, 0.9);
}
.brand-text {
  color: var(--text);
}
.brand-dot {
  color: var(--cyan);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 4px;
  border-radius: 999px;
  border: 1px solid transparent;
}
.nav-links a {
  position: relative;
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 0.885rem;
  color: var(--text-2);
  transition: color 0.2s, background 0.2s;
  white-space: nowrap;
}
.nav-links a:hover {
  color: var(--text);
  background: var(--panel);
}
.nav-links a.is-active {
  color: var(--text);
  background: rgba(255, 255, 255, 0.055);
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.06) inset;
}
.nav-links a.is-active::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 1px;
  width: 14px;
  height: 2px;
  transform: translateX(-50%);
  border-radius: 2px;
  background: var(--grad);
}
.nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}
.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: 11px;
  border: 1px solid var(--line);
  background: var(--panel);
  cursor: pointer;
  padding: 0;
  place-items: center;
}
.nav-toggle span {
  display: block;
  width: 16px;
  height: 1.5px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.3s var(--ease), opacity 0.2s;
  position: relative;
}
.nav-toggle span + span {
  margin-top: 4px;
}

/* mobile drawer */
.drawer {
  position: fixed;
  inset: 0;
  z-index: 101;
  display: none;
  padding: 0 20px;
  background: rgba(4, 5, 10, 0.94);
  backdrop-filter: blur(22px);
  -webkit-backdrop-filter: blur(22px);
}
.drawer.is-open {
  display: flex;
  flex-direction: column;
}
.drawer-top {
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.drawer nav {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 0;
}
.drawer nav a {
  font-size: 1.24rem;
  font-weight: 520;
  padding: 14px 4px;
  color: var(--text-2);
  border-bottom: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.drawer nav a span {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--text-3);
}
.drawer-foot {
  margin-top: auto;
  padding: 24px 0 36px;
  color: var(--text-3);
  font-size: 0.82rem;
}

/* ---------- 7. Buttons ---------- */
.btn {
  --btn-bg: transparent;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 44px;
  padding: 0 20px;
  border-radius: 999px;
  border: 1px solid var(--line-hi);
  background: var(--btn-bg);
  color: var(--text);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: transform 0.25s var(--ease), box-shadow 0.3s var(--ease),
    background 0.25s, border-color 0.25s, color 0.2s;
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}
.btn:hover {
  transform: translateY(-1px);
  border-color: rgba(255, 255, 255, 0.3);
}
.btn:active {
  transform: translateY(0);
}
.btn:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}
.btn-primary {
  border: none;
  background: var(--grad);
  color: #04050a;
  font-weight: 600;
  box-shadow: 0 10px 30px -12px rgba(79, 139, 249, 0.9);
}
.btn-primary:hover {
  box-shadow: 0 16px 40px -14px rgba(99, 102, 241, 0.95);
}
.btn-primary::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(115deg, transparent 20%, rgba(255, 255, 255, 0.5), transparent 80%);
  transform: translateX(-120%);
  transition: transform 0.7s var(--ease);
}
.btn-primary:hover::after {
  transform: translateX(120%);
}
.btn-ghost {
  background: var(--panel);
  border-color: var(--line);
  color: var(--text-2);
}
.btn-ghost:hover {
  color: var(--text);
  background: var(--panel-hi);
}
.btn-sm {
  height: 36px;
  padding: 0 14px;
  font-size: 0.82rem;
}
.btn-icon {
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: 11px;
  background: var(--panel);
  border-color: var(--line);
}
.btn[disabled] {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
}
.btn-primary[disabled] {
  background: rgba(255, 255, 255, 0.07);
  color: var(--text-3);
  box-shadow: none;
}
.btn-primary[disabled]::after {
  display: none;
}

/* ---------- 8. Chips / badges ---------- */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 30px;
  padding: 0 13px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--panel);
  font-size: 0.76rem;
  color: var(--text-2);
  letter-spacing: 0.01em;
}
.chip-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 4px rgba(52, 211, 153, 0.12);
  animation: pulse 2.6s infinite;
}
.chip-dot.is-amber {
  background: var(--amber);
  box-shadow: 0 0 0 4px rgba(251, 191, 36, 0.12);
}
.chip-dot.is-dim {
  background: var(--text-3);
  box-shadow: 0 0 0 4px rgba(255, 255, 255, 0.06);
  animation: none;
}
@keyframes pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.45;
  }
}
.tag {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  padding: 3px 8px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--line);
  color: var(--text-2);
  text-transform: uppercase;
}

/* ---------- 9. Hero ---------- */
.hero {
  position: relative;
  padding: calc(var(--nav-h) + 84px) 0 72px;
  overflow: hidden;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 56px;
  align-items: center;
}
.hero h1 {
  margin: 22px 0 24px;
}
.hero .lead {
  max-width: 46ch;
}
.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}
.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 28px;
  margin-top: 46px;
  padding-top: 26px;
  border-top: 1px solid var(--line);
}
.hero-meta div {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.hero-meta b {
  font-size: 1.32rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}
.hero-meta span {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-3);
}

/* hero visual: orbit */
.orb-wrap {
  position: relative;
  aspect-ratio: 1;
  display: grid;
  place-items: center;
}
.orb {
  position: relative;
  width: 78%;
  aspect-ratio: 1;
  border-radius: 50%;
  background:
    radial-gradient(circle at 32% 28%, rgba(199, 210, 254, 0.95), rgba(99, 102, 241, 0.5) 32%, rgba(8, 10, 20, 0.2) 68%),
    radial-gradient(circle at 70% 76%, rgba(34, 211, 238, 0.5), transparent 60%);
  box-shadow: 0 0 90px -10px rgba(99, 102, 241, 0.55),
    0 0 160px 20px rgba(34, 211, 238, 0.12);
  filter: blur(0.3px);
  animation: breathe 9s ease-in-out infinite;
}
@keyframes breathe {
  0%,
  100% {
    transform: scale(1);
    filter: brightness(1);
  }
  50% {
    transform: scale(1.03);
    filter: brightness(1.1);
  }
}
.ring {
  position: absolute;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.1);
}
.ring-1 {
  inset: 8%;
  border-style: dashed;
  border-color: rgba(255, 255, 255, 0.13);
  animation: spin 46s linear infinite;
}
.ring-2 {
  inset: 0%;
  border-color: rgba(255, 255, 255, 0.055);
}
.ring-3 {
  inset: 18%;
  border-color: rgba(34, 211, 238, 0.16);
  animation: spin 30s linear infinite reverse;
}
@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}
.orb-node {
  position: absolute;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: #c7d2fe;
  box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.2), 0 0 18px 2px rgba(129, 140, 248, 0.8);
}
.orb-node:nth-child(4) {
  top: 9%;
  left: 50%;
}
.orb-node:nth-child(5) {
  bottom: 17%;
  left: 9%;
  background: #67e8f9;
  box-shadow: 0 0 0 4px rgba(34, 211, 238, 0.18), 0 0 18px 2px rgba(34, 211, 238, 0.7);
}
.orb-node:nth-child(6) {
  top: 32%;
  right: 4%;
  width: 7px;
  height: 7px;
}
.orb-label {
  position: absolute;
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  color: var(--text-3);
  text-transform: uppercase;
}

/* ---------- 10. Module cards ---------- */
.modules {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.module {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 28px 26px 24px;
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.045), rgba(255, 255, 255, 0.012));
  overflow: hidden;
  transition: transform 0.4s var(--ease), border-color 0.4s, background 0.4s;
  isolation: isolate;
}
.module::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  opacity: 0;
  transition: opacity 0.45s;
  background: radial-gradient(
    420px circle at var(--mx, 50%) var(--my, 0%),
    rgba(99, 102, 241, 0.16),
    transparent 62%
  );
}
.module:hover {
  transform: translateY(-4px);
  border-color: var(--line-hi);
}
.module:hover::before {
  opacity: 1;
}
.module-ico {
  width: 46px;
  height: 46px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--line);
  color: #c7d2fe;
}
.module-ico svg {
  width: 22px;
  height: 22px;
}
.module h3 {
  font-size: 1.22rem;
  font-weight: 580;
  letter-spacing: -0.01em;
  display: flex;
  align-items: center;
  gap: 10px;
}
.module p {
  color: var(--text-2);
  font-size: 0.92rem;
  line-height: 1.7;
}
.module-foot {
  margin-top: auto;
  padding-top: 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--text-3);
  text-transform: uppercase;
}
.module-foot .arrow {
  transition: transform 0.35s var(--ease);
  color: var(--text-2);
}
.module:hover .module-foot .arrow {
  transform: translateX(4px);
  color: var(--cyan);
}
.module-line {
  position: absolute;
  top: 0;
  left: 26px;
  right: 26px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.32), transparent);
  opacity: 0;
  transition: opacity 0.4s;
}
.module:hover .module-line {
  opacity: 1;
}

/* ---------- 11. Page head ---------- */
.page-head {
  padding: calc(var(--nav-h) + 66px) 0 44px;
  position: relative;
}
.page-head .eyebrow {
  margin-bottom: 18px;
}
.page-head h1 {
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  line-height: 1.08;
  letter-spacing: -0.03em;
  font-weight: 600;
}
.page-head .lead {
  margin-top: 18px;
  max-width: 62ch;
}
.page-head-row {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 30px;
  flex-wrap: wrap;
}

/* ---------- 12. Panels ---------- */
.panel {
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.01));
  position: relative;
  overflow: hidden;
}
.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 22px;
  border-bottom: 1px solid var(--line);
}
.panel-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  font-weight: 540;
  letter-spacing: 0.01em;
}
.panel-body {
  padding: 22px;
}
.panel-glow::after {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(140deg, rgba(99, 102, 241, 0.5), transparent 42%, transparent 62%, rgba(34, 211, 238, 0.35));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
}

/* ---------- 13. Transfer page ---------- */
.transfer-grid {
  display: grid;
  grid-template-columns: 1fr 88px 1fr;
  gap: 0;
  align-items: stretch;
}
.dropzone {
  border: 1.5px dashed rgba(255, 255, 255, 0.16);
  border-radius: var(--r);
  padding: 34px 22px;
  text-align: center;
  transition: border-color 0.3s, background 0.3s, transform 0.3s;
  cursor: pointer;
  background: rgba(255, 255, 255, 0.012);
}
.dropzone:hover,
.dropzone.is-over {
  border-color: rgba(99, 102, 241, 0.7);
  background: rgba(99, 102, 241, 0.07);
}
.dropzone.is-over {
  transform: scale(1.01);
}
.dropzone-ico {
  width: 52px;
  height: 52px;
  margin: 0 auto 14px;
  border-radius: 16px;
  display: grid;
  place-items: center;
  background: rgba(99, 102, 241, 0.12);
  border: 1px solid rgba(99, 102, 241, 0.28);
  color: #c7d2fe;
}
.dropzone h4 {
  font-size: 0.98rem;
  font-weight: 550;
  margin-bottom: 6px;
}
.dropzone p {
  font-size: 0.82rem;
  color: var(--text-3);
}
.file-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 14px;
}
.file-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border-radius: var(--r-sm);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--line);
  font-size: 0.84rem;
}
.file-ico {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  background: rgba(34, 211, 238, 0.1);
  color: #67e8f9;
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0;
  flex: none;
}
.file-name {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.file-size {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--text-3);
  flex: none;
}
.file-del {
  background: none;
  border: 0;
  color: var(--text-3);
  cursor: pointer;
  padding: 2px;
  line-height: 0;
  border-radius: 4px;
}
.file-del:hover {
  color: #f87171;
}

/* connector */
.connector {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  position: relative;
}
.connector-line {
  position: relative;
  width: 1px;
  flex: 1;
  min-height: 60px;
  background: linear-gradient(180deg, transparent, rgba(255, 255, 255, 0.14), transparent);
  overflow: hidden;
}
.connector-line::after {
  content: "";
  position: absolute;
  left: -1px;
  width: 3px;
  height: 26px;
  border-radius: 3px;
  background: linear-gradient(180deg, transparent, var(--cyan), transparent);
  animation: flow 2.8s linear infinite;
}
@keyframes flow {
  0% {
    top: -30px;
    opacity: 0;
  }
  20% {
    opacity: 1;
  }
  80% {
    opacity: 1;
  }
  100% {
    top: 100%;
    opacity: 0;
  }
}
.connector-badge {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  border: 1px solid var(--line-hi);
  background: var(--bg-2);
  color: var(--text-2);
  flex: none;
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.08em;
}
.connector.is-live .connector-badge {
  color: #67e8f9;
  border-color: rgba(34, 211, 238, 0.5);
  box-shadow: 0 0 24px -4px rgba(34, 211, 238, 0.6);
}

/* code input */
.code-row {
  display: flex;
  gap: 8px;
  justify-content: space-between;
}
.code-cell {
  width: 100%;
  aspect-ratio: 0.82;
  border-radius: var(--r-sm);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
  font-family: var(--mono);
  font-size: clamp(1rem, 2.4vw, 1.5rem);
  font-weight: 600;
  text-align: center;
  color: var(--text);
  transition: border-color 0.2s, background 0.2s, transform 0.2s;
  padding: 0;
}
.code-cell:focus {
  outline: none;
  border-color: rgba(34, 211, 238, 0.7);
  background: rgba(34, 211, 238, 0.08);
  transform: translateY(-2px);
}
.code-display {
  font-family: var(--mono);
  font-size: clamp(1.8rem, 5vw, 2.6rem);
  letter-spacing: 0.24em;
  font-weight: 600;
  text-align: center;
  padding: 20px 10px;
  border-radius: var(--r-sm);
  background: rgba(99, 102, 241, 0.08);
  border: 1px dashed rgba(99, 102, 241, 0.35);
  color: #c7d2fe;
  user-select: all;
}

/* steps */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  counter-reset: step;
}
.step {
  padding: 22px;
  border-radius: var(--r);
  border: 1px solid var(--line);
  background: var(--panel);
  position: relative;
}
.step-n {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  color: var(--cyan);
  margin-bottom: 12px;
  display: block;
}
.step h4 {
  font-size: 1rem;
  font-weight: 550;
  margin-bottom: 8px;
}
.step p {
  font-size: 0.86rem;
  color: var(--text-2);
  line-height: 1.7;
}

/* progress */
.progress {
  height: 4px;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.07);
  overflow: hidden;
  margin: 14px 0 8px;
}
.progress-bar {
  height: 100%;
  width: 0;
  border-radius: 4px;
  background: var(--grad);
  transition: width 0.2s linear;
  position: relative;
}
.progress-meta {
  display: flex;
  justify-content: space-between;
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  color: var(--text-3);
}

/* ---------- 14. Projects ---------- */
.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.filter {
  height: 34px;
  padding: 0 15px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--text-2);
  font-size: 0.82rem;
  cursor: pointer;
  transition: all 0.22s var(--ease);
}
.filter:hover {
  color: var(--text);
  border-color: var(--line-hi);
}
.filter.is-on {
  color: #04050a;
  background: var(--text);
  border-color: var(--text);
  font-weight: 550;
}
.grid-projects {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.project {
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  background: var(--panel);
  overflow: hidden;
  cursor: pointer;
  transition: transform 0.4s var(--ease), border-color 0.3s;
  display: flex;
  flex-direction: column;
  text-align: left;
  padding: 0;
  color: inherit;
  font: inherit;
}
.project:hover {
  transform: translateY(-4px);
  border-color: var(--line-hi);
}
.project:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}
.thumb {
  aspect-ratio: 16 / 10;
  position: relative;
  overflow: hidden;
  display: grid;
  place-items: center;
  border-bottom: 1px solid var(--line);
}
.thumb::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(4, 5, 10, 0.75));
}
.thumb-glyph {
  font-family: var(--mono);
  font-size: 2.1rem;
  font-weight: 700;
  letter-spacing: -0.04em;
  color: rgba(255, 255, 255, 0.9);
  z-index: 1;
  text-shadow: 0 6px 30px rgba(0, 0, 0, 0.5);
}
.thumb.t1 {
  background: radial-gradient(circle at 28% 26%, #4f46e5, #0b1020 68%);
}
.thumb.t2 {
  background: radial-gradient(circle at 72% 30%, #0891b2, #06121a 70%);
}
.thumb.t3 {
  background: radial-gradient(circle at 40% 70%, #7c3aed, #0d0a18 70%);
}
.thumb.t4 {
  background: radial-gradient(circle at 60% 40%, #0f766e, #04120f 70%);
}
.thumb.t5 {
  background: radial-gradient(circle at 30% 60%, #be185d, #16070e 72%);
}
.thumb.t6 {
  background: radial-gradient(circle at 55% 35%, #4338ca, #0a0c1c 70%);
}
.thumb-grid {
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(255, 255, 255, 0.09) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.09) 1px, transparent 1px);
  background-size: 26px 26px;
  mask-image: radial-gradient(circle at 50% 50%, #000, transparent 72%);
  -webkit-mask-image: radial-gradient(circle at 50% 50%, #000, transparent 72%);
}
.project-body {
  padding: 18px 20px 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex: 1;
}
.project-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  font-size: 1.02rem;
  font-weight: 560;
}
.project-desc {
  font-size: 0.85rem;
  color: var(--text-2);
  line-height: 1.65;
}
.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: auto;
  padding-top: 6px;
}
.project.is-hidden {
  display: none;
}

/* upload panel */
.upload-zone {
  border: 1.5px dashed rgba(255, 255, 255, 0.16);
  border-radius: var(--r);
  padding: 40px 24px;
  text-align: center;
  transition: 0.3s;
}
.upload-zone.is-over {
  border-color: rgba(34, 211, 238, 0.65);
  background: rgba(34, 211, 238, 0.05);
}
.field-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}
.field {
  display: flex;
  flex-direction: column;
  gap: 7px;
}
.field label {
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-3);
}
.input,
.select,
.textarea {
  width: 100%;
  min-height: 42px;
  padding: 9px 13px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.025);
  font-size: 0.88rem;
  transition: border-color 0.2s, background 0.2s;
}
.textarea {
  min-height: 86px;
  resize: vertical;
}
.input:focus,
.select:focus,
.textarea:focus {
  outline: none;
  border-color: rgba(99, 102, 241, 0.65);
  background: rgba(99, 102, 241, 0.05);
}
.input::placeholder,
.textarea::placeholder {
  color: var(--text-3);
}
.input[type="file"] {
  padding: 7px 10px;
  font-size: 0.8rem;
  color: var(--text-2);
  line-height: 1.6;
}
.input[type="file"]::file-selector-button {
  margin-right: 10px;
  padding: 5px 11px;
  border-radius: 7px;
  border: 1px solid var(--line-hi);
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
  font-family: var(--font);
  font-size: 0.76rem;
  cursor: pointer;
  transition: background 0.2s;
}
.input[type="file"]::file-selector-button:hover {
  background: rgba(255, 255, 255, 0.12);
}
.select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M2 4.5 6 8.5 10 4.5' stroke='%236b7189' stroke-width='1.4' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 32px;
}

/* ---------- 15. AI page ---------- */
.ai-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 20px;
  align-items: start;
}
.endpoint {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 13px 16px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: rgba(0, 0, 0, 0.35);
  font-family: var(--mono);
  font-size: 0.82rem;
  color: #a5b4fc;
  overflow: hidden;
}
.endpoint span {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.copy {
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--text-3);
  border-radius: 7px;
  height: 28px;
  padding: 0 9px;
  font-size: 0.7rem;
  font-family: var(--mono);
  cursor: pointer;
  transition: 0.2s;
  flex: none;
  display: inline-flex;
  align-items: center;
  gap: 5px;
}
.copy:hover {
  color: var(--text);
  border-color: var(--line-hi);
}
.copy.is-done {
  color: var(--green);
  border-color: rgba(52, 211, 153, 0.45);
}
.codeblock {
  position: relative;
  border-radius: var(--r);
  border: 1px solid var(--line);
  background: rgba(0, 0, 0, 0.4);
  overflow: hidden;
}
.codeblock-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 10px 8px 16px;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.02);
}
.tabs {
  display: flex;
  gap: 2px;
}
.tab {
  border: 0;
  background: transparent;
  color: var(--text-3);
  font-family: var(--mono);
  font-size: 0.74rem;
  padding: 5px 11px;
  border-radius: 7px;
  cursor: pointer;
  transition: 0.2s;
}
.tab:hover {
  color: var(--text-2);
}
.tab.is-on {
  color: var(--text);
  background: rgba(255, 255, 255, 0.07);
}
.codeblock pre {
  margin: 0;
  padding: 18px;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 0.79rem;
  line-height: 1.75;
  color: #c8cee0;
  -webkit-overflow-scrolling: touch;
}
.pane {
  display: none;
}
.pane.is-on {
  display: block;
}
.tok-k {
  color: #c4b5fd;
}
.tok-s {
  color: #86efac;
}
.tok-c {
  color: #4b5563;
  font-style: italic;
}
.tok-n {
  color: #fbbf24;
}
.tok-p {
  color: #67e8f9;
}
.model-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 4px;
  border-bottom: 1px solid var(--line);
  font-size: 0.86rem;
}
.model-row:last-child {
  border-bottom: 0;
}
.model-name {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--text);
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.model-badge {
  font-family: var(--mono);
  font-size: 0.64rem;
  padding: 2px 7px;
  border-radius: 5px;
  border: 1px solid rgba(52, 211, 153, 0.3);
  color: #6ee7b7;
  background: rgba(52, 211, 153, 0.08);
  flex: none;
}
.model-badge.is-warn {
  border-color: rgba(251, 191, 36, 0.3);
  color: #fcd34d;
  background: rgba(251, 191, 36, 0.08);
}

/* ---------- 16. About ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 48px;
  align-items: start;
}
.portrait {
  aspect-ratio: 4/5;
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  background: radial-gradient(circle at 30% 20%, rgba(99, 102, 241, 0.5), #080a14 65%);
  display: grid;
  place-items: center;
  position: relative;
  overflow: hidden;
}
.portrait span {
  font-size: clamp(3rem, 9vw, 6rem);
  font-weight: 700;
  letter-spacing: -0.05em;
  background: var(--grad-text);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  z-index: 1;
}
.portrait::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 30px 30px;
  mask-image: radial-gradient(circle at 50% 50%, #000, transparent 70%);
  -webkit-mask-image: radial-gradient(circle at 50% 50%, #000, transparent 70%);
}
.portrait::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 74%;
  aspect-ratio: 1;
  border-radius: 50%;
  border: 1px solid rgba(199, 210, 254, 0.22);
  box-shadow: 0 0 0 28px rgba(199, 210, 254, 0.04),
    0 0 0 60px rgba(199, 210, 254, 0.022),
    inset 0 0 60px rgba(99, 102, 241, 0.22);
}
.timeline {
  position: relative;
  padding-left: 26px;
}
.timeline::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: linear-gradient(180deg, rgba(99, 102, 241, 0.7), rgba(34, 211, 238, 0.25), transparent);
}
.tl-item {
  position: relative;
  padding-bottom: 26px;
}
.tl-item::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 7px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--bg);
  border: 1.5px solid var(--indigo);
  box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
}
.tl-time {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  color: var(--text-3);
  text-transform: uppercase;
}
.tl-item h4 {
  margin: 4px 0 5px;
  font-size: 1rem;
  font-weight: 550;
}
.tl-item p {
  font-size: 0.87rem;
  color: var(--text-2);
}
.stack-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

/* ---------- 17. Misc blocks ---------- */
.split-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.note {
  display: flex;
  gap: 12px;
  padding: 14px 16px;
  border-radius: var(--r-sm);
  border: 1px solid rgba(251, 191, 36, 0.22);
  background: rgba(251, 191, 36, 0.05);
  font-size: 0.84rem;
  color: #fde68a;
  line-height: 1.7;
}
.note svg {
  flex: none;
  margin-top: 2px;
}
.note.is-info {
  border-color: rgba(34, 211, 238, 0.22);
  background: rgba(34, 211, 238, 0.05);
  color: #a5f3fc;
}
.kv {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 11px 0;
  border-bottom: 1px solid var(--line);
  font-size: 0.86rem;
}
.kv:last-child {
  border-bottom: 0;
}
.kv span {
  color: var(--text-3);
}
.kv b {
  font-weight: 500;
  font-family: var(--mono);
  font-size: 0.8rem;
}

/* ---------- 18. CTA band ---------- */
.cta-band {
  position: relative;
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  overflow: hidden;
  padding: 54px 44px;
  text-align: center;
  background: linear-gradient(180deg, rgba(99, 102, 241, 0.1), rgba(255, 255, 255, 0.01));
}
.cta-band::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(600px 220px at 50% 0%, rgba(99, 102, 241, 0.3), transparent 70%);
  pointer-events: none;
}
.cta-band h2 {
  position: relative;
  font-size: clamp(1.6rem, 3.4vw, 2.3rem);
  letter-spacing: -0.025em;
  font-weight: 600;
}
.cta-band p {
  position: relative;
  margin: 12px auto 26px;
  max-width: 48ch;
  color: var(--text-2);
}
.cta-band .btn {
  position: relative;
}

/* ---------- 19. Footer ---------- */
.footer {
  border-top: 1px solid var(--line);
  padding: 54px 0 34px;
  margin-top: 40px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 30px;
  margin-bottom: 44px;
}
.footer h5 {
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-3);
  margin: 0 0 14px;
  font-weight: 500;
}
.footer-links {
  display: flex;
  flex-direction: column;
  gap: 9px;
  font-size: 0.86rem;
  color: var(--text-2);
}
.footer-links a:hover {
  color: var(--text);
}
.footer-brand p {
  margin-top: 14px;
  font-size: 0.85rem;
  color: var(--text-3);
  max-width: 34ch;
  line-height: 1.7;
}
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.05em;
  color: var(--text-3);
}
.footer-status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

/* ---------- 20. Modal / toast ---------- */
.modal {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: rgba(3, 4, 9, 0.8);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.modal.is-open {
  display: flex;
}
.modal-card {
  width: min(560px, 100%);
  max-height: 88vh;
  overflow-y: auto;
  border-radius: var(--r-lg);
  border: 1px solid var(--line-hi);
  background: #0a0c16;
  box-shadow: 0 40px 120px -20px #000;
  animation: modalIn 0.35s var(--ease-out);
}
@keyframes modalIn {
  from {
    opacity: 0;
    transform: translateY(14px) scale(0.985);
  }
}
.modal-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 22px 0;
}
.modal-body {
  padding: 18px 22px 24px;
}
.modal-close {
  border: 1px solid var(--line);
  background: var(--panel);
  border-radius: 9px;
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  cursor: pointer;
  color: var(--text-2);
  flex: none;
}
.modal-close:hover {
  color: var(--text);
  border-color: var(--line-hi);
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 30px;
  transform: translate(-50%, 20px);
  z-index: 300;
  padding: 11px 18px;
  border-radius: 999px;
  border: 1px solid var(--line-hi);
  background: rgba(12, 14, 24, 0.95);
  backdrop-filter: blur(10px);
  font-size: 0.84rem;
  opacity: 0;
  pointer-events: none;
  transition: all 0.35s var(--ease);
  white-space: nowrap;
}
.toast.is-on {
  opacity: 1;
  transform: translate(-50%, 0);
}

/* ---------- 21. Reveal ---------- */
/* only hide when JS is available — no-JS users still see content */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out);
  transition-delay: var(--d, 0ms);
}
.js [data-reveal].is-in {
  opacity: 1;
  transform: none;
}

/* ---------- 22. Responsive ---------- */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .orb-wrap {
    width: 100%;
    max-width: 300px;
    margin: 30px auto 0;
    order: 0;
  }
  .orb-label {
    display: none;
  }
  .modules {
    grid-template-columns: 1fr;
  }
  .ai-grid,
  .about-grid,
  .split-2 {
    grid-template-columns: 1fr;
  }
  .grid-projects {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .transfer-grid {
    grid-template-columns: 1fr;
    gap: 18px;
  }
  .connector {
    flex-direction: row;
    height: 44px;
  }
  .connector-line {
    width: auto;
    height: 1px;
    min-height: 0;
    flex: 1;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.14), transparent);
  }
  .connector-line::after {
    left: 0;
    top: -1px;
    width: 26px;
    height: 3px;
    background: linear-gradient(90deg, transparent, var(--cyan), transparent);
    animation: flowH 2.8s linear infinite;
  }
  .connector-line:nth-of-type(2)::after {
    animation-delay: 1.4s;
  }
  @keyframes flowH {
    0% {
      left: -30px;
      opacity: 0;
    }
    20% {
      opacity: 1;
    }
    80% {
      opacity: 1;
    }
    100% {
      left: 100%;
      opacity: 0;
    }
  }
  .nav-links {
    display: none;
  }
  .nav-toggle {
    display: grid;
  }
  .nav-actions .btn {
    display: none;
  }
}

@media (max-width: 720px) {
  .container,
  .nav-inner {
    width: min(100% - 36px, var(--maxw));
  }
  .section {
    padding: 64px 0;
  }
  .hero {
    padding: calc(var(--nav-h) + 46px) 0 40px;
  }
  .hero-meta {
    gap: 20px;
    margin-top: 34px;
  }
  .hero-meta b {
    font-size: 1.1rem;
  }
  .page-head {
    padding: calc(var(--nav-h) + 38px) 0 32px;
  }
  .grid-projects {
    grid-template-columns: 1fr;
  }
  .steps {
    grid-template-columns: 1fr;
  }
  .field-grid {
    grid-template-columns: 1fr;
  }
  .cta-band {
    padding: 40px 22px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 26px;
  }
  .footer {
    padding-top: 40px;
  }
  .hero-cta .btn {
    flex: 1;
    min-width: 140px;
  }
  .code-row {
    gap: 6px;
  }
  .code-cell {
    aspect-ratio: 1;
    font-size: 1.05rem;
  }
  .panel-body {
    padding: 18px;
  }
  .panel-head {
    padding: 14px 18px;
  }
}

/* ---------- 23. Motion preference ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  .js [data-reveal] {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 24. Login ---------- */
.login-page {
  display: grid;
  place-items: center;
  min-height: 100vh;
  padding: 40px 20px;
}
.login-wrap {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 22px;
}
.login-card {
  position: relative;
  width: min(420px, 100%);
  padding: 32px 30px 24px;
  border-radius: 26px;
  border: 1px solid var(--line-hi);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.055), rgba(255, 255, 255, 0.012));
  box-shadow: 0 40px 120px -30px #000, 0 0 0 1px rgba(255, 255, 255, 0.03) inset;
  overflow: hidden;
}
.login-glow {
  position: absolute;
  inset: -120px 10% auto;
  height: 240px;
  background: radial-gradient(closest-side, rgba(99, 102, 241, 0.55), transparent);
  filter: blur(34px);
  pointer-events: none;
}
.login-title {
  position: relative;
  font-size: 1.62rem;
  letter-spacing: -0.02em;
  font-weight: 600;
  margin-top: 24px;
}
.login-sub {
  position: relative;
  color: var(--text-2);
  font-size: 0.86rem;
  margin: 8px 0 24px;
  line-height: 1.65;
}
.login-error {
  min-height: 20px;
  font-size: 0.8rem;
  color: #fca5a5;
  margin: 10px 0 2px;
}
.login-btn {
  width: 100%;
  margin-top: 4px;
}
.login-foot {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 22px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: 0.7rem;
  color: var(--text-3);
  font-family: var(--mono);
  letter-spacing: 0.04em;
}
.login-copy {
  font-family: var(--mono);
  font-size: 0.66rem;
  color: var(--text-3);
  letter-spacing: 0.06em;
}
@keyframes shakeX {
  10%, 90% { transform: translateX(-1px); }
  20%, 80% { transform: translateX(2px); }
  30%, 50%, 70% { transform: translateX(-4px); }
  40%, 60% { transform: translateX(4px); }
}
.shake {
  animation: shakeX 0.5s;
}

/* ---------- 25. Chat ---------- */
.chat-panel {
  display: flex;
  flex-direction: column;
}
.chat-log {
  flex: 1;
  overflow-y: auto;
  padding: 20px 22px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-height: 240px;
  max-height: 460px;
  scroll-behavior: smooth;
}
.chat-msg {
  max-width: 84%;
  padding: 11px 14px;
  border-radius: 14px;
  font-size: 0.9rem;
  line-height: 1.7;
  white-space: pre-wrap;
  word-break: break-word;
}
.chat-msg.is-bot {
  align-self: flex-start;
  background: rgba(255, 255, 255, 0.045);
  border: 1px solid var(--line);
  border-bottom-left-radius: 4px;
}
.chat-msg.is-user {
  align-self: flex-end;
  background: var(--grad);
  color: #04050a;
  font-weight: 500;
  border-bottom-right-radius: 4px;
}
.chat-msg.is-err {
  align-self: center;
  background: rgba(248, 113, 113, 0.1);
  border: 1px solid rgba(248, 113, 113, 0.3);
  color: #fca5a5;
  font-size: 0.8rem;
  text-align: center;
}
.chat-form {
  display: flex;
  gap: 10px;
  padding: 14px 16px;
  border-top: 1px solid var(--line);
  align-items: flex-end;
}
.chat-form textarea {
  flex: 1;
  min-height: 44px;
  max-height: 132px;
  resize: none;
  padding: 11px 14px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
  font-size: 0.88rem;
  line-height: 1.5;
}
.chat-form textarea:focus {
  outline: none;
  border-color: rgba(34, 211, 238, 0.6);
  background: rgba(34, 211, 238, 0.04);
}
.chat-form .btn {
  height: 44px;
  flex: none;
}
.typing {
  display: inline-flex;
  gap: 4px;
  align-items: center;
  height: 12px;
}
.typing i {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--text-3);
  animation: blink 1.2s infinite;
}
.typing i:nth-child(2) { animation-delay: 0.15s; }
.typing i:nth-child(3) { animation-delay: 0.3s; }
@keyframes blink {
  0%, 100% { opacity: 0.2; }
  50% { opacity: 1; }
}

/* ---------- 26. Project covers / empty ---------- */
.thumb img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.thumb.has-img {
  background: #0a0c16;
}
.thumb.has-img .thumb-glyph,
.thumb.has-img .thumb-grid {
  display: none;
}
.empty-state {
  padding: 56px 24px;
  text-align: center;
  border: 1px dashed var(--line-hi);
  border-radius: var(--r-lg);
  color: var(--text-3);
  font-size: 0.9rem;
  line-height: 1.8;
}
.empty-state b {
  display: block;
  color: var(--text-2);
  font-size: 1rem;
  margin-bottom: 6px;
  font-weight: 550;
}

.modal-cover {
  display: none;
  aspect-ratio: 16 / 9;
  background: #0a0c16;
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}
.modal-cover.is-on {
  display: block;
}
.modal-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.modal-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 18px;
}
.modal-actions .btn {
  flex: 1;
  min-width: 140px;
}

/* ---------- 27. Transfer states ---------- */
.code-display.is-active {
  color: #67e8f9;
  border-color: rgba(34, 211, 238, 0.55);
  background: rgba(34, 211, 238, 0.08);
  border-style: solid;
}
.result-line {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-top: 14px;
  font-size: 0.84rem;
  color: var(--text-2);
}
.result-line b {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--text);
}

/* =========================================================
   v3 — 统一布局与组件
   目标：一套栅格、一套字号、一套卡片，页面之间彼此关联
   ========================================================= */

:root {
  --maxw: 1120px;
  --nav-h: 64px;
  --r-lg: 20px;
  --r: 14px;
  --gap: 20px;
}

.container,
.nav-inner {
  width: min(100% - 48px, var(--maxw));
}

/* 统一的垂直节奏 */
.section {
  padding: 64px 0;
}
.section-sm {
  padding: 36px 0;
}
.section-line {
  border-top: 1px solid var(--line);
}
.page-head {
  padding: calc(var(--nav-h) + 52px) 0 28px;
}
.page-head .lead {
  margin-top: 14px;
  font-size: 0.98rem;
  max-width: 56ch;
}
.page-head h1 {
  font-size: clamp(1.85rem, 3.4vw, 2.6rem);
  letter-spacing: -0.028em;
  line-height: 1.12;
}
.hero {
  padding: calc(var(--nav-h) + 52px) 0 44px;
}
.hero-grid {
  gap: 44px;
  grid-template-columns: 1.15fr 0.85fr;
}
.display {
  font-size: clamp(1.9rem, 4.2vw, 3.1rem);
  line-height: 1.1;
  letter-spacing: -0.03em;
}
.h2 {
  font-size: clamp(1.32rem, 2.2vw, 1.72rem);
  letter-spacing: -0.02em;
}
.h3 {
  font-size: 1.02rem;
}
.lead {
  font-size: 0.98rem;
  line-height: 1.72;
}
.eyebrow {
  font-size: 0.66rem;
  letter-spacing: 0.14em;
}

/* 统一的区块标题行 */
.block-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}
.block-head h2 {
  font-size: clamp(1.15rem, 1.8vw, 1.4rem);
  letter-spacing: -0.015em;
  font-weight: 580;
}
.block-head p {
  font-size: 0.84rem;
  color: var(--text-3);
  max-width: 40ch;
}

/* 导航改成整体感更强的分段控件 */
.nav-links {
  gap: 2px;
  padding: 3px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.022);
  border-radius: 999px;
}
.nav-links a {
  padding: 7px 14px;
  font-size: 0.83rem;
}
.nav-links a.is-active::after {
  display: none;
}
.brand {
  font-size: 0.8rem;
  letter-spacing: 0.12em;
}

/* 传输页改成两栏，去掉中间装饰列 */
.transfer-grid {
  grid-template-columns: 1fr 1fr;
  gap: var(--gap);
}
.connector {
  display: none;
}

/* 项目网格自适应：条目少时自动撑满一行 */
.grid-projects {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

/* 聊天区高度收敛 */
.chat-log {
  min-height: 200px;
}

/* 卡片统一：更小的圆角、更轻的阴影 */
.module,
.panel,
.project,
.step {
  border-radius: var(--r-lg);
}
.module {
  padding: 22px 20px 18px;
  gap: 12px;
}
.module h3 {
  font-size: 1.05rem;
}
.module p {
  font-size: 0.86rem;
  line-height: 1.65;
}
.panel-body {
  padding: 20px;
}
.panel-head {
  padding: 15px 20px;
}
.step {
  padding: 18px;
}
.step h4 {
  font-size: 0.94rem;
}
.step p {
  font-size: 0.82rem;
}

/* 首页中枢面板 */
.tiles {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--gap);
}
.tile {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--panel);
  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease);
}
.tile:hover {
  border-color: var(--line-hi);
  transform: translateY(-2px);
}
.tile-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.1em;
  color: var(--text-3);
  text-transform: uppercase;
}
.tile b {
  font-size: 1.02rem;
  font-weight: 560;
  letter-spacing: -0.01em;
}
.tile p {
  font-size: 0.84rem;
  color: var(--text-2);
  line-height: 1.65;
}
.tile-foot {
  margin-top: auto;
  padding-top: 10px;
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--text-3);
  display: flex;
  align-items: center;
  gap: 8px;
}

/* 最近项目 */
.recent {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: var(--panel);
}
.recent-cover {
  width: 76px;
  height: 50px;
  border-radius: 10px;
  object-fit: cover;
  background: linear-gradient(135deg, #4f46e5, #0b1020);
  flex: none;
}
.recent-body {
  min-width: 0;
  flex: 1;
}
.recent-body b {
  display: block;
  font-size: 0.92rem;
  font-weight: 550;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.recent-body span {
  font-size: 0.78rem;
  color: var(--text-3);
}
.recent-empty {
  padding: 18px;
  border: 1px dashed var(--line-hi);
  border-radius: var(--r);
  font-size: 0.84rem;
  color: var(--text-3);
  text-align: center;
}

/* 相关模块：把各页串起来 */
.related {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}
.related a {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: var(--panel);
  transition: border-color 0.25s, background 0.25s;
}
.related a:hover {
  border-color: var(--line-hi);
  background: var(--panel-hi);
}
.related b {
  font-size: 0.92rem;
  font-weight: 550;
}
.related span {
  font-size: 0.78rem;
  color: var(--text-3);
}

/* 折叠区 */
.collapsible {
  display: none;
}
.collapsible.is-open {
  display: block;
}

/* 状态点 */
.state {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  color: var(--text-3);
}
.state i {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--green);
  display: block;
}
.state.is-amber i {
  background: var(--amber);
}

/* 聊天快捷提示 */
.chat-prompts {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 2px;
}
.prompt {
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--text-2);
  font-size: 0.78rem;
  padding: 7px 13px;
  border-radius: 999px;
  cursor: pointer;
  transition: 0.2s;
}
.prompt:hover {
  border-color: var(--line-hi);
  color: var(--text);
  background: var(--panel-hi);
}

/* 新建项目占位卡 */
.project-new {
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-style: dashed;
  background: transparent;
  color: var(--text-3);
  min-height: 240px;
  font-size: 0.88rem;
}
.project-new:hover {
  color: var(--text);
  border-color: var(--line-hi);
  background: rgba(255, 255, 255, 0.02);
}
.project-new .plus {
  font-size: 1.5rem;
  line-height: 1;
  font-family: var(--mono);
}

@media (max-width: 1024px) {
  .tiles {
    grid-template-columns: 1fr;
  }
  .transfer-grid {
    grid-template-columns: 1fr;
  }
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .orb-wrap {
    max-width: 240px;
  }
}

@media (max-width: 720px) {
  .container,
  .nav-inner {
    width: min(100% - 32px, var(--maxw));
  }
  .section {
    padding: 48px 0;
  }
  .hero {
    padding: calc(var(--nav-h) + 36px) 0 32px;
  }
  .page-head {
    padding: calc(var(--nav-h) + 32px) 0 22px;
  }
  .related {
    grid-template-columns: 1fr;
  }
  .block-head {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }
}

/* ---------- 28. Print ---------- */
@media print {
  .nav,
  .footer,
  .bg,
  .grain,
  .cta-band {
    display: none;
  }
  body {
    background: #fff;
    color: #000;
  }
}