/* =================================================================
   销帮 GEO — AI Agent Suite
   Style: Futuristic Tech · Glassmorphism · Dark
   Fonts: Space Grotesk / DM Sans / Noto Sans SC / JetBrains Mono
================================================================= */

:root {
  /* palette */
  --bg-0: #05070d;
  --bg-1: #090d18;
  --bg-2: #0f1424;
  --surface: rgba(255, 255, 255, 0.04);
  --surface-hi: rgba(255, 255, 255, 0.07);
  --border: rgba(255, 255, 255, 0.08);
  --border-hi: rgba(255, 255, 255, 0.18);

  --text: #eef2fb;
  --text-dim: #9aa6bf;
  --text-mute: #64708b;

  --accent: #00d4ff; /* electric cyan */
  --accent-2: #7c3aed; /* violet */
  --accent-3: #22d3ee;
  --grad: linear-gradient(135deg, #00d4ff 0%, #7c3aed 100%);
  --grad-soft: linear-gradient(135deg, rgba(0, 212, 255, 0.15), rgba(124, 58, 237, 0.15));

  /* typography */
  --font-display: 'Space Grotesk', 'Noto Sans SC', system-ui, sans-serif;
  --font-body: 'DM Sans', 'Noto Sans SC', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;

  /* spacing */
  --radius-sm: 8px;
  --radius: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --gutter: clamp(1rem, 2vw, 1.5rem);
  --section-y: clamp(4rem, 9vw, 9rem);

  /* motion */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in: cubic-bezier(0.7, 0, 0.84, 0);
  --dur: 320ms;

  /* z */
  --z-bg: -1;
  --z-base: 1;
  --z-nav: 50;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg-0);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  min-height: 100vh;
}

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

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

button {
  font: inherit;
  cursor: pointer;
  border: 0;
  background: transparent;
  color: inherit;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

::selection {
  background: rgba(0, 212, 255, 0.3);
  color: #fff;
}

/* =================================================================
   BACKGROUND FIELD
================================================================= */
.bg-field {
  position: fixed;
  inset: 0;
  z-index: var(--z-bg);
  overflow: hidden;
  pointer-events: none;
  background:
    radial-gradient(ellipse 60% 40% at 50% 0%, rgba(0, 212, 255, 0.14), transparent 60%),
    radial-gradient(ellipse 40% 50% at 90% 100%, rgba(124, 58, 237, 0.15), transparent 60%),
    radial-gradient(ellipse 50% 40% at 10% 80%, rgba(34, 211, 238, 0.08), transparent 60%),
    linear-gradient(180deg, #05070d 0%, #070a14 40%, #05070d 100%);
}

.bg-grid {
  position: absolute;
  inset: -50%;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, #000 30%, transparent 85%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, #000 30%, transparent 85%);
  transform: perspective(900px) rotateX(55deg) translateY(10vh);
  transform-origin: center top;
  opacity: 0.7;
}

.bg-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.6;
  animation: floatGlow 20s var(--ease-out) infinite alternate;
}
.bg-glow--a { width: 520px; height: 520px; top: -200px; left: -120px; background: radial-gradient(circle, #00d4ff 0%, transparent 70%); }
.bg-glow--b { width: 620px; height: 620px; top: 40%; right: -220px; background: radial-gradient(circle, #7c3aed 0%, transparent 70%); animation-delay: -6s; }
.bg-glow--c { width: 480px; height: 480px; bottom: -180px; left: 30%; background: radial-gradient(circle, #22d3ee 0%, transparent 70%); animation-delay: -12s; }

@keyframes floatGlow {
  0%   { transform: translate(0, 0) scale(1); }
  50%  { transform: translate(40px, -30px) scale(1.1); }
  100% { transform: translate(-30px, 30px) scale(0.95); }
}

#particles {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0.55;
}

.bg-noise {
  position: absolute;
  inset: 0;
  opacity: 0.035;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* =================================================================
   TYPOGRAPHY HELPERS
================================================================= */
h1, h2, h3, h4, h5 {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: -0.02em;
  margin: 0;
  color: var(--text);
}

.grad-text {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.55em;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-dim);
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  backdrop-filter: blur(10px);
}

.eyebrow__pulse {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 0 rgba(0, 212, 255, 0.6);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%   { box-shadow: 0 0 0 0 rgba(0, 212, 255, 0.6); }
  70%  { box-shadow: 0 0 0 8px rgba(0, 212, 255, 0); }
  100% { box-shadow: 0 0 0 0 rgba(0, 212, 255, 0); }
}

.eyebrow--line {
  border: 0;
  background: transparent;
  padding: 0;
  color: var(--accent);
  backdrop-filter: none;
}

/* =================================================================
   BUTTONS
================================================================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5em;
  padding: 0.72em 1.2em;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 14px;
  letter-spacing: 0.01em;
  border-radius: 999px;
  transition: transform var(--dur) var(--ease-out),
              background var(--dur) var(--ease-out),
              box-shadow var(--dur) var(--ease-out),
              border-color var(--dur) var(--ease-out),
              color var(--dur) var(--ease-out);
  cursor: pointer;
  border: 1px solid transparent;
  white-space: nowrap;
}

.btn svg { width: 14px; height: 14px; }

.btn--lg { padding: 0.95em 1.6em; font-size: 15px; }
.btn--full { width: 100%; }

.btn--primary {
  background: var(--grad);
  color: #001018;
  font-weight: 600;
  box-shadow: 0 10px 30px -10px rgba(0, 212, 255, 0.5),
              inset 0 1px 0 rgba(255, 255, 255, 0.3);
}
.btn--primary:hover {
  box-shadow: 0 15px 35px -8px rgba(124, 58, 237, 0.55),
              inset 0 1px 0 rgba(255, 255, 255, 0.45);
  transform: translateY(-1px);
}

.btn--ghost {
  background: var(--surface);
  border-color: var(--border);
  color: var(--text);
  backdrop-filter: blur(10px);
}
.btn--ghost:hover {
  background: var(--surface-hi);
  border-color: var(--border-hi);
  color: var(--accent);
}

/* =================================================================
   NAV
================================================================= */
.nav {
  position: fixed;
  top: clamp(0.5rem, 1.5vw, 1rem);
  left: 0;
  right: 0;
  z-index: var(--z-nav);
  padding: 0 clamp(1rem, 3vw, 2.5rem);
  transition: top var(--dur) var(--ease-out);
}

.nav__inner {
  max-width: 1320px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 10px 14px 10px 20px;
  background: rgba(10, 14, 26, 0.55);
  border: 1px solid var(--border);
  border-radius: 999px;
  backdrop-filter: blur(18px) saturate(1.4);
  -webkit-backdrop-filter: blur(18px) saturate(1.4);
  box-shadow: 0 16px 40px -20px rgba(0, 0, 0, 0.5);
}

.nav[data-scrolled="true"] .nav__inner {
  background: rgba(8, 11, 22, 0.85);
  border-color: var(--border-hi);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.brand__mark {
  width: 34px;
  height: 34px;
  color: var(--accent);
  display: grid;
  place-items: center;
  background: radial-gradient(circle at center, rgba(0, 212, 255, 0.25), transparent 70%);
  border-radius: 50%;
  filter: drop-shadow(0 0 8px rgba(0, 212, 255, 0.4));
}
.brand__mark svg { width: 26px; height: 26px; animation: spinSlow 40s linear infinite; }

@keyframes spinSlow {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}
.brand__name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 16px;
  letter-spacing: -0.01em;
}
.brand__tag {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-mute);
  letter-spacing: 0.12em;
}

.nav__menu {
  display: flex;
  gap: 8px;
  margin-left: auto;
}
.nav__menu a {
  position: relative;
  padding: 8px 14px;
  font-size: 14px;
  color: var(--text-dim);
  border-radius: 999px;
  transition: color var(--dur), background var(--dur);
}
.nav__menu a:hover {
  color: var(--text);
  background: var(--surface);
}

.nav__cta {
  display: flex;
  gap: 8px;
}

.nav__toggle {
  display: none;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--surface);
  color: var(--text);
  align-items: center;
  justify-content: center;
}

@media (max-width: 960px) {
  .nav__menu { display: none; }
  .nav__cta .btn--ghost { display: none; }
}

@media (max-width: 640px) {
  .nav__toggle { display: inline-flex; }
  .nav__cta .btn--primary { display: none; }
}

/* =================================================================
   LAYOUT
================================================================= */
main {
  max-width: 1320px;
  margin: 0 auto;
  padding: 0 clamp(1rem, 3vw, 2.5rem);
}

.section {
  padding-top: var(--section-y);
  padding-bottom: 0;
  position: relative;
}

.section__head {
  max-width: 820px;
  margin: 0 auto 3.5rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
}

.section__head--split {
  flex-direction: row;
  max-width: none;
  text-align: left;
  align-items: flex-end;
  justify-content: space-between;
  gap: 2rem;
  flex-wrap: wrap;
}
.section__head--split > div {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.section__title {
  font-size: clamp(2rem, 4.2vw, 3.6rem);
  line-height: 1.05;
  letter-spacing: -0.03em;
  font-weight: 600;
}

.section__sub {
  color: var(--text-dim);
  font-size: clamp(1rem, 1.15vw, 1.1rem);
  max-width: 60ch;
}
.section__sub--right {
  text-align: right;
  max-width: 42ch;
}

/* =================================================================
   HERO
================================================================= */
.hero {
  padding-top: clamp(6rem, 12vw, 9rem);
  padding-bottom: clamp(3rem, 6vw, 5rem);
}

.hero__chrome {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  backdrop-filter: blur(10px);
  max-width: max-content;
  margin: 0 auto 2.5rem;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-mute);
}
.chrome__dot {
  width: 10px; height: 10px; border-radius: 50%;
}
.chrome__dot--r { background: #ff5f56; }
.chrome__dot--y { background: #ffbd2e; }
.chrome__dot--g { background: #27c93f; }
.chrome__path { margin-left: 10px; color: var(--text-dim); }
.chrome__status {
  margin-left: 18px;
  color: var(--accent-3);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.chrome__status em {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent-3);
  box-shadow: 0 0 6px var(--accent-3);
  animation: pulse 1.8s infinite;
}

.hero__content {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  gap: clamp(2rem, 5vw, 5rem);
  align-items: center;
}

.hero__copy { max-width: 640px; }

.hero__title {
  font-size: clamp(2.4rem, 5.5vw, 5rem);
  line-height: 1.02;
  letter-spacing: -0.035em;
  font-weight: 600;
  margin: 1.2rem 0 1.5rem;
}

.hero__sub {
  color: var(--text-dim);
  font-size: clamp(1rem, 1.2vw, 1.15rem);
  line-height: 1.7;
  max-width: 54ch;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 2rem 0;
}

.hero__meta {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  padding: 0;
  margin: 3rem 0 0;
  list-style: none;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.hero__meta li {
  padding: 20px 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  border-right: 1px solid var(--border);
}
.hero__meta li:last-child { border-right: 0; }

.hero__meta strong {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 2vw, 1.8rem);
  font-weight: 600;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero__meta span {
  font-size: 12px;
  color: var(--text-mute);
  font-family: var(--font-mono);
  letter-spacing: 0.08em;
}

/* ---- Hero Visual: Orb ------------------------------------------------------ */
.hero__visual {
  position: relative;
  aspect-ratio: 1;
  max-width: 560px;
  margin: 0 auto;
  display: grid;
  place-items: center;
}

.orb {
  position: relative;
  width: 100%;
  height: 100%;
  display: grid;
  place-items: center;
}

.orb__core {
  position: absolute;
  inset: 40%;
  color: var(--accent);
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 212, 255, 0.4), transparent 70%);
  filter: drop-shadow(0 0 20px rgba(0, 212, 255, 0.5));
  animation: pulseCore 4s ease-in-out infinite;
}
.orb__core svg { width: 100%; height: 100%; }

@keyframes pulseCore {
  0%, 100% { transform: scale(1); filter: drop-shadow(0 0 20px rgba(0, 212, 255, 0.5)); }
  50%      { transform: scale(1.08); filter: drop-shadow(0 0 35px rgba(124, 58, 237, 0.6)); }
}

.orb__ring {
  position: absolute;
  border-radius: 50%;
  border: 1px solid var(--border-hi);
  pointer-events: none;
}
.orb__ring--1 { inset: 22%; border-color: rgba(0, 212, 255, 0.3); animation: ringSpin 40s linear infinite; }
.orb__ring--2 { inset: 10%; border-color: rgba(124, 58, 237, 0.22); animation: ringSpin 60s linear infinite reverse; }
.orb__ring--3 { inset: 0;   border-color: rgba(255, 255, 255, 0.08); animation: ringSpin 90s linear infinite; }

.orb__ring--1::before,
.orb__ring--2::before {
  content: '';
  position: absolute;
  top: -4px; left: 50%;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent);
  transform: translateX(-50%);
}
.orb__ring--2::before { background: var(--accent-2); box-shadow: 0 0 12px var(--accent-2); }

@keyframes ringSpin {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

.orb__lines {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  mix-blend-mode: screen;
  animation: ringSpin 80s linear infinite;
}

.orb__node {
  position: absolute;
  top: 50%; left: 50%;
  --r: 45%;
  transform: translate(-50%, -50%) rotate(var(--a)) translate(var(--r)) rotate(calc(var(--a) * -1));
  padding: 10px 16px;
  background: rgba(10, 14, 26, 0.82);
  border: 1px solid var(--border-hi);
  border-radius: 14px;
  backdrop-filter: blur(8px);
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
  box-shadow: 0 8px 24px -12px rgba(0, 0, 0, 0.6);
  animation: nodeFloat 6s ease-in-out infinite;
}
.orb__node--1 { animation-delay: -0.0s; }
.orb__node--2 { animation-delay: -1.0s; }
.orb__node--3 { animation-delay: -2.0s; }
.orb__node--4 { animation-delay: -3.0s; }
.orb__node--5 { animation-delay: -4.0s; }
.orb__node--6 { animation-delay: -5.0s; }

.orb__node::before {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: 14px;
  padding: 1px;
  background: var(--grad);
  opacity: 0.4;
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask-composite: exclude;
  -webkit-mask-composite: xor;
  pointer-events: none;
}

.orb__node span::before {
  content: '';
  display: inline-block;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
  margin-right: 6px;
  vertical-align: middle;
}

@keyframes nodeFloat {
  0%, 100% {
    transform: translate(-50%, -50%) rotate(var(--a)) translate(var(--r)) rotate(calc(var(--a) * -1));
  }
  50% {
    transform: translate(-50%, -50%) rotate(var(--a)) translate(calc(var(--r) + 8px)) rotate(calc(var(--a) * -1));
  }
}

@media (max-width: 960px) {
  .hero__content { grid-template-columns: 1fr; }
  .hero__visual { max-width: 380px; order: -1; margin-bottom: 1.5rem; }
  .hero__meta { grid-template-columns: repeat(2, 1fr); }
  .hero__meta li { border-bottom: 1px solid var(--border); }
  .hero__meta li:nth-child(2) { border-right: 0; }
}

/* ---- Ribbon --------------------------------------------------------------- */
.ribbon {
  margin-top: 4rem;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 18px 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(12px);
  overflow: hidden;
}
.ribbon__label {
  flex-shrink: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-mute);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding-right: 1.5rem;
  border-right: 1px solid var(--border);
}
.ribbon__track {
  flex: 1;
  overflow: hidden;
  mask-image: linear-gradient(to right, transparent, #000 10%, #000 90%, transparent);
  -webkit-mask-image: linear-gradient(to right, transparent, #000 10%, #000 90%, transparent);
}
.ribbon__row {
  display: flex;
  align-items: center;
  gap: 2rem;
  width: max-content;
  animation: marquee 40s linear infinite;
}
.ribbon__row span {
  font-family: var(--font-display);
  font-size: 15px;
  color: var(--text-dim);
  white-space: nowrap;
}
.ribbon__row i {
  display: inline-block;
  width: 4px; height: 4px;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0.6;
}

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

/* =================================================================
   BENTO — AGENTS
================================================================= */
.bento {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 18px;
}

.agent {
  position: relative;
  grid-column: span 2;
  padding: 28px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(14px) saturate(1.2);
  -webkit-backdrop-filter: blur(14px) saturate(1.2);
  overflow: hidden;
  transition: transform var(--dur) var(--ease-out),
              border-color var(--dur) var(--ease-out),
              background var(--dur) var(--ease-out);
  isolation: isolate;
}

.agent::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 60% at 50% 0%, rgba(0, 212, 255, 0.1), transparent 70%);
  opacity: 0;
  transition: opacity var(--dur) var(--ease-out);
  pointer-events: none;
  z-index: -1;
}

.agent:hover {
  border-color: var(--border-hi);
  background: var(--surface-hi);
  transform: translateY(-2px);
}
.agent:hover::before { opacity: 1; }

.agent--lg { grid-column: span 3; }
.agent--accent {
  background: linear-gradient(160deg, rgba(124, 58, 237, 0.12), rgba(0, 212, 255, 0.06));
  border-color: rgba(124, 58, 237, 0.3);
}
.agent--accent::before {
  background: radial-gradient(ellipse 80% 60% at 50% 0%, rgba(124, 58, 237, 0.22), transparent 70%);
  opacity: 1;
}

.agent__index {
  position: absolute;
  top: 28px;
  right: 28px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-mute);
  letter-spacing: 0.08em;
}

.agent__glyph {
  width: 56px;
  height: 56px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  margin-bottom: 22px;
  color: var(--accent);
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.16), rgba(124, 58, 237, 0.1));
  border: 1px solid var(--border);
}
.agent__glyph svg { width: 30px; height: 30px; }
.agent--accent .agent__glyph { color: var(--accent-2); }

.agent__name {
  font-size: 1.4rem;
  font-weight: 600;
  margin-bottom: 10px;
  letter-spacing: -0.02em;
}

.agent__desc {
  color: var(--text-dim);
  font-size: 0.95rem;
  line-height: 1.7;
  margin: 0 0 18px;
}

.agent__features {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.agent__features li {
  position: relative;
  padding-left: 22px;
  font-size: 0.9rem;
  color: var(--text-dim);
  font-family: var(--font-mono);
  letter-spacing: 0.01em;
}
.agent__features li::before {
  content: '';
  position: absolute;
  left: 0; top: 8px;
  width: 12px; height: 2px;
  background: var(--accent);
  border-radius: 2px;
  box-shadow: 0 0 6px rgba(0, 212, 255, 0.5);
}

/* Chat preview in AI 客服 card */
.agent__preview {
  margin-top: 22px;
  padding: 14px;
  background: rgba(5, 7, 13, 0.5);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.chat {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.chat__bubble {
  padding: 10px 14px;
  border-radius: 14px;
  font-size: 13px;
  max-width: 88%;
  line-height: 1.5;
}
.chat__bubble--in {
  background: var(--surface-hi);
  border: 1px solid var(--border);
  align-self: flex-start;
  border-bottom-left-radius: 4px;
  color: var(--text-dim);
}
.chat__bubble--out {
  background: var(--grad);
  color: #001018;
  align-self: flex-end;
  border-bottom-right-radius: 4px;
  font-weight: 500;
  display: inline-flex;
  align-items: flex-start;
  gap: 8px;
}
.chat__avatar {
  display: inline-grid;
  place-items: center;
  width: 20px; height: 20px;
  border-radius: 50%;
  background: rgba(0, 16, 24, 0.25);
  font-size: 10px;
  font-family: var(--font-mono);
  font-weight: 600;
  flex-shrink: 0;
}
.chat__typing {
  display: inline-flex;
  gap: 4px;
  padding: 12px 14px;
  border-radius: 14px;
  background: var(--surface-hi);
  border: 1px solid var(--border);
  align-self: flex-start;
  border-bottom-left-radius: 4px;
}
.chat__typing em {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0.5;
  animation: typing 1.4s infinite;
}
.chat__typing em:nth-child(2) { animation-delay: 0.2s; }
.chat__typing em:nth-child(3) { animation-delay: 0.4s; }
@keyframes typing {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
  30% { transform: translateY(-3px); opacity: 1; }
}

/* Article preview for AI 记者 */
.agent__preview--article {
  padding: 18px 20px;
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.08), rgba(124, 58, 237, 0.05));
}
.article__tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--accent);
  padding: 4px 10px;
  background: rgba(0, 212, 255, 0.1);
  border: 1px solid rgba(0, 212, 255, 0.3);
  border-radius: 999px;
  margin-bottom: 10px;
  text-transform: uppercase;
}
.article h4 {
  font-size: 1rem;
  line-height: 1.5;
  margin: 0 0 10px;
}
.article__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-mute);
}
.article__meta i {
  width: 3px; height: 3px;
  border-radius: 50%;
  background: var(--text-mute);
}

@media (max-width: 1024px) {
  .bento { grid-template-columns: repeat(2, 1fr); }
  .agent, .agent--lg { grid-column: span 1; }
}
@media (max-width: 560px) {
  .bento { grid-template-columns: 1fr; }
}

/* =================================================================
   CHANNELS
================================================================= */
.channels {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  margin-top: 1rem;
}

.channels__hub {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  pointer-events: none;
  z-index: 0;
}
.channels__core {
  display: grid;
  place-items: center;
  gap: 6px;
  padding: 18px 22px;
  background: rgba(10, 14, 26, 0.9);
  border: 1px solid var(--border-hi);
  border-radius: 20px;
  backdrop-filter: blur(12px);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  box-shadow: 0 16px 40px -12px rgba(0, 212, 255, 0.3);
}
.channels__core svg { width: 40px; height: 40px; }

.channel {
  position: relative;
  padding: 26px 22px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  backdrop-filter: blur(12px);
  transition: all var(--dur) var(--ease-out);
  z-index: 1;
}
.channel:hover {
  border-color: var(--border-hi);
  background: var(--surface-hi);
  transform: translateY(-2px);
}

.channel__icon {
  width: 40px; height: 40px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  background: var(--grad-soft);
  color: var(--accent);
  margin-bottom: 14px;
}
.channel__icon svg { width: 20px; height: 20px; }

.channel h4 {
  font-size: 1.05rem;
  margin-bottom: 4px;
}
.channel p {
  color: var(--text-dim);
  font-size: 0.88rem;
  margin: 0;
}

.channel--wide {
  grid-column: span 4;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 22px;
  padding: 22px 26px;
}
.channel--wide h4 { margin: 0 0 2px; }
.channel--wide p { margin: 0; }

.code {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent-3);
  background: rgba(0, 0, 0, 0.45);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 14px;
  margin: 0;
  white-space: pre;
  line-height: 1.6;
}

@media (max-width: 860px) {
  .channels { grid-template-columns: repeat(2, 1fr); }
  .channel--wide { grid-column: span 2; grid-template-columns: auto 1fr; }
  .channel--wide .code { grid-column: 1 / -1; }
  .channels__hub { display: none; }
}

/* =================================================================
   TIERS (4-level Permissions)
================================================================= */
.tiers {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.tier {
  position: relative;
  padding: 26px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(12px);
  overflow: hidden;
  transition: transform var(--dur) var(--ease-out),
              border-color var(--dur) var(--ease-out);
}
.tier:hover {
  transform: translateY(-3px);
  border-color: var(--border-hi);
}

.tier::after {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--grad);
  opacity: 0.5;
  transition: opacity var(--dur);
}
.tier:hover::after { opacity: 1; }

.tier > header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
}

.tier__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.15em;
  color: var(--accent);
  padding: 4px 10px;
  border: 1px solid rgba(0, 212, 255, 0.3);
  background: rgba(0, 212, 255, 0.06);
  border-radius: 999px;
}
.tier__badge {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-mute);
  letter-spacing: 0.06em;
}

.tier h3 {
  font-size: 1.35rem;
  margin-bottom: 6px;
  letter-spacing: -0.02em;
}
.tier p {
  color: var(--text-dim);
  font-size: 0.92rem;
  margin: 0 0 16px;
  min-height: 3em;
}
.tier ul {
  list-style: none;
  margin: 0;
  padding: 16px 0 0;
  border-top: 1px dashed var(--border);
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.tier ul li {
  position: relative;
  padding-left: 20px;
  font-size: 0.88rem;
  color: var(--text-dim);
}
.tier ul li::before {
  content: '';
  position: absolute;
  left: 0; top: 7px;
  width: 8px; height: 8px;
  border: 1px solid var(--accent);
  border-radius: 50%;
  background: rgba(0, 212, 255, 0.15);
}

.tier--01 { border-color: rgba(0, 212, 255, 0.25); }
.tier--02 { border-color: rgba(124, 58, 237, 0.22); }
.tier--03 { border-color: rgba(34, 211, 238, 0.2); }
.tier--04 { border-color: rgba(255, 255, 255, 0.1); }

@media (max-width: 960px) {
  .tiers { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 500px) {
  .tiers { grid-template-columns: 1fr; }
  .tier p { min-height: 0; }
}

/* =================================================================
   FLOW
================================================================= */
.flow {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  list-style: none;
  padding: 0;
  margin: 3rem 0 0;
  counter-reset: step;
}

.flow__step {
  position: relative;
  padding: 28px 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(10px);
  transition: transform var(--dur), border-color var(--dur);
}
.flow__step:hover {
  transform: translateY(-2px);
  border-color: var(--border-hi);
}

.flow__step:not(:last-child)::after {
  content: '';
  position: absolute;
  top: 50%;
  right: -9px;
  width: 18px;
  height: 1px;
  background: var(--accent);
  opacity: 0.4;
  z-index: 2;
}

.flow__idx {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--accent);
  padding: 4px 10px;
  border: 1px solid var(--border-hi);
  border-radius: 999px;
  margin-bottom: 14px;
}
.flow__step h4 {
  font-size: 1.1rem;
  margin-bottom: 8px;
}
.flow__step p {
  color: var(--text-dim);
  font-size: 0.9rem;
  line-height: 1.65;
  margin: 0;
}

@media (max-width: 960px) {
  .flow { grid-template-columns: repeat(2, 1fr); }
  .flow__step:not(:last-child)::after { display: none; }
}
@media (max-width: 500px) {
  .flow { grid-template-columns: 1fr; }
}

/* =================================================================
   PLANS
================================================================= */
.plans {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  align-items: stretch;
}

.plan {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 32px 28px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(12px);
  transition: transform var(--dur), border-color var(--dur), background var(--dur);
}
.plan:hover {
  transform: translateY(-3px);
  border-color: var(--border-hi);
}

.plan > header {
  margin-bottom: 18px;
}
.plan h3 {
  font-size: 1.3rem;
  margin-bottom: 4px;
}
.plan > header p {
  color: var(--text-mute);
  font-size: 0.88rem;
  margin: 0;
}

.plan__price {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin: 1rem 0 1.2rem;
  padding-bottom: 1.2rem;
  border-bottom: 1px dashed var(--border);
}
.plan__curr { color: var(--text-dim); font-family: var(--font-display); font-size: 1.1rem; }
.plan__num {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 4vw, 3.2rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1;
}
.plan__unit {
  color: var(--text-mute);
  font-size: 0.85rem;
  margin-left: 4px;
}
.plan__price--text span {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3vw, 2.2rem);
  font-weight: 500;
  color: var(--text);
  letter-spacing: -0.02em;
}

.plan__features {
  list-style: none;
  padding: 0;
  margin: 0 0 2rem;
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex: 1;
}
.plan__features li {
  position: relative;
  padding-left: 24px;
  color: var(--text-dim);
  font-size: 0.92rem;
}
.plan__features li::before {
  content: '';
  position: absolute;
  left: 0; top: 8px;
  width: 14px; height: 7px;
  border-left: 1.5px solid var(--accent);
  border-bottom: 1.5px solid var(--accent);
  transform: rotate(-45deg);
  transform-origin: left center;
}

.plan--featured {
  background: linear-gradient(160deg, rgba(124, 58, 237, 0.14), rgba(0, 212, 255, 0.08));
  border-color: rgba(0, 212, 255, 0.35);
  transform: translateY(-8px);
}
.plan--featured:hover {
  transform: translateY(-11px);
}
.plan--featured::before {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: var(--radius-lg);
  padding: 1px;
  background: var(--grad);
  opacity: 0.4;
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask-composite: exclude;
  -webkit-mask-composite: xor;
  pointer-events: none;
}

.plan__ribbon {
  position: absolute;
  top: 20px;
  right: 20px;
  padding: 4px 12px;
  background: var(--grad);
  color: #001018;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 11px;
  letter-spacing: 0.05em;
  border-radius: 999px;
  box-shadow: 0 4px 14px -3px rgba(0, 212, 255, 0.4);
}

@media (max-width: 860px) {
  .plans { grid-template-columns: 1fr; }
  .plan--featured { transform: none; }
  .plan--featured:hover { transform: translateY(-3px); }
}

/* =================================================================
   CTA
================================================================= */
.cta { padding-bottom: var(--section-y); }

.cta__panel {
  position: relative;
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 3rem;
  align-items: center;
  padding: clamp(2.5rem, 5vw, 4.5rem);
  background: linear-gradient(160deg, rgba(10, 14, 26, 0.8), rgba(15, 20, 36, 0.8));
  border: 1px solid var(--border-hi);
  border-radius: var(--radius-xl);
  backdrop-filter: blur(20px);
  overflow: hidden;
}

.cta__panel::before {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: var(--radius-xl);
  padding: 1px;
  background: var(--grad);
  opacity: 0.45;
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask-composite: exclude;
  -webkit-mask-composite: xor;
  pointer-events: none;
}

.cta__halo {
  position: absolute;
  top: -40%; right: -30%;
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(124, 58, 237, 0.3), transparent 60%);
  filter: blur(40px);
  pointer-events: none;
}

.cta__body { position: relative; z-index: 1; }

.cta__body h2 {
  font-size: clamp(2rem, 3.5vw, 2.8rem);
  line-height: 1.1;
  margin: 1rem 0;
  letter-spacing: -0.03em;
}

.cta__body p {
  color: var(--text-dim);
  max-width: 38ch;
  margin: 0;
}

.cta__form { position: relative; z-index: 1; }

.cta__fields {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.cta__fields label {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.cta__fields label > span {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--text-mute);
  text-transform: uppercase;
}

.cta__fields input,
.cta__fields select {
  background: rgba(5, 7, 13, 0.6);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px 14px;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 14px;
  transition: border-color var(--dur), background var(--dur);
}
.cta__fields input:focus,
.cta__fields select:focus {
  outline: none;
  border-color: var(--accent);
  background: rgba(0, 212, 255, 0.06);
}

.cta__fields input::placeholder { color: var(--text-mute); }

.cta__fields .btn { grid-column: span 2; margin-top: 6px; }

.cta__note {
  grid-column: span 2;
  font-size: 11px;
  color: var(--text-mute);
  margin: 0;
  text-align: center;
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
}

.cta__done {
  text-align: center;
  padding: 2rem 1rem;
}
.cta__check {
  width: 60px; height: 60px;
  margin: 0 auto 18px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--grad);
  color: #001018;
  box-shadow: 0 10px 30px -8px rgba(0, 212, 255, 0.4);
}
.cta__check svg { width: 30px; height: 30px; }
.cta__done h3 { font-size: 1.4rem; margin-bottom: 6px; }
.cta__done p { color: var(--text-dim); margin: 0; }

@media (max-width: 860px) {
  .cta__panel { grid-template-columns: 1fr; }
  .cta__fields { grid-template-columns: 1fr; }
  .cta__fields .btn,
  .cta__note { grid-column: span 1; }
}

/* =================================================================
   FOOTER
================================================================= */
.footer {
  margin-top: clamp(4rem, 8vw, 6rem);
  border-top: 1px solid var(--border);
  background: linear-gradient(180deg, transparent, rgba(5, 7, 13, 0.5));
}

.footer__top {
  max-width: 1320px;
  margin: 0 auto;
  padding: clamp(2.5rem, 5vw, 4rem) clamp(1rem, 3vw, 2.5rem) 2.5rem;
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 3rem;
}

.footer__brand p {
  margin-top: 18px;
  color: var(--text-dim);
  font-size: 0.95rem;
  max-width: 26ch;
}

.footer__cols {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.footer__col {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.footer__col h5 {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.15em;
  color: var(--text-mute);
  text-transform: uppercase;
  margin-bottom: 6px;
}
.footer__col a {
  font-size: 0.9rem;
  color: var(--text-dim);
  transition: color var(--dur);
}
.footer__col a:hover { color: var(--accent); }

.footer__bottom {
  max-width: 1320px;
  margin: 0 auto;
  padding: 1.5rem clamp(1rem, 3vw, 2.5rem);
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-mute);
  letter-spacing: 0.04em;
  flex-wrap: wrap;
  gap: 10px;
}

.footer__sysinfo {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent-3);
  box-shadow: 0 0 6px var(--accent-3);
  animation: pulse 2s infinite;
}

@media (max-width: 860px) {
  .footer__top { grid-template-columns: 1fr; }
  .footer__cols { grid-template-columns: repeat(2, 1fr); }
}

/* =================================================================
   SCROLL-REVEAL
================================================================= */
[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out);
}
[data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* =================================================================
   REDUCED MOTION
================================================================= */
@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;
  }
  .bg-grid, .bg-glow, #particles { display: none; }
  [data-reveal] { opacity: 1; transform: none; }
}