/* ============================================================
   Prism homepage · styles
   Reuses tokens.css for design tokens; adds homepage-specific
   layout for hero, trust strip, features, demo, clients,
   categories, channel banner, "not doing", pricing, faq, cta, footer.
============================================================ */

/* Page wrap & background ambience (mirrors Models.html base) */
.page {
  position: relative;
  z-index: 1;
  min-height: 100vh;
}

.bg-ambience {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}
.bg-ambience .stars {
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(1px 1px at 20% 30%, rgba(255,255,255,0.5), transparent 50%),
    radial-gradient(1px 1px at 60% 80%, rgba(255,255,255,0.4), transparent 50%),
    radial-gradient(1px 1px at 80% 15%, rgba(255,255,255,0.5), transparent 50%),
    radial-gradient(1px 1px at 35% 65%, rgba(255,255,255,0.3), transparent 50%),
    radial-gradient(2px 2px at 90% 50%, rgba(255,255,255,0.5), transparent 50%),
    radial-gradient(1px 1px at 10% 90%, rgba(255,255,255,0.4), transparent 50%),
    radial-gradient(1px 1px at 50% 10%, rgba(255,255,255,0.4), transparent 50%),
    radial-gradient(1px 1px at 75% 35%, rgba(255,255,255,0.3), transparent 50%),
    radial-gradient(1px 1px at 25% 50%, rgba(255,255,255,0.4), transparent 50%);
  background-size: 1200px 800px;
  opacity: 0.7;
  animation: drift 200s linear infinite;
}
.bg-ambience .nebula-1 {
  position: absolute;
  top: -20%; left: -10%;
  width: 70vw; height: 70vw;
  background: radial-gradient(circle, rgba(139,92,246,0.18), transparent 60%);
  filter: blur(60px);
  animation: float 40s ease-in-out infinite;
}
.bg-ambience .nebula-2 {
  position: absolute;
  bottom: -30%; right: -15%;
  width: 80vw; height: 80vw;
  background: radial-gradient(circle, rgba(6,182,212,0.12), transparent 60%);
  filter: blur(80px);
  animation: float 60s ease-in-out infinite reverse;
}
.bg-ambience .nebula-3 {
  position: absolute;
  top: 40%; left: 50%;
  width: 50vw; height: 50vw;
  background: radial-gradient(circle, rgba(236,72,153,0.08), transparent 60%);
  filter: blur(60px);
  animation: float 80s ease-in-out infinite;
}
@keyframes drift {
  from { transform: translate(0, 0); }
  to { transform: translate(-1200px, -400px); }
}
@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(80px, -60px) scale(1.1); }
}

/* Iridescent text utility */
.iridescent-text {
  background: var(--iridescent);
  background-clip: text;
  -webkit-background-clip: text;
  color: transparent;
  background-size: 200% 200%;
  animation: shimmer 8s ease-in-out infinite;
}
@keyframes shimmer {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

/* Scrollbar */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--bg-base); }
::-webkit-scrollbar-thumb { background: rgba(139,92,246,0.2); border-radius: 8px; }
::-webkit-scrollbar-thumb:hover { background: rgba(139,92,246,0.4); }

button { font-family: inherit; }
input, textarea, select { font-family: inherit; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
}

.mono { font-family: var(--font-mono); }
.display { font-family: var(--font-display); letter-spacing: -0.02em; }

/* ============================================================
   1. Top nav
============================================================ */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  transition: backdrop-filter 240ms var(--ease-out), background 240ms var(--ease-out), border-color 240ms var(--ease-out);
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  background: rgba(5, 5, 16, 0.7);
  border-bottom: 1px solid var(--border-subtle);
}
.nav-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 18px 64px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 32px;
}
.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text-primary);
}
.nav-brand-name {
  font-size: 18px;
  font-weight: 700;
}
.nav-brand-zh {
  font-size: 12px;
  color: var(--text-muted);
  margin-left: 4px;
}
.nav-links {
  display: flex;
  justify-content: center;
  gap: 28px;
  align-items: center;
}
.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  display: flex;
  flex-direction: column;
  align-items: center;
  line-height: 1.2;
  transition: color var(--dur-hover) var(--ease-out);
}
.nav-link.active { color: var(--text-primary); }
.nav-link:hover { color: var(--text-primary); }
.nav-link .zh { font-size: 13px; }
.nav-link .en { font-size: 10px; color: var(--text-muted); margin-top: 1px; letter-spacing: 0.06em; text-transform: uppercase; }

.nav-right { display: flex; align-items: center; gap: 14px; }

/* ─── Language picker ─────────────────────────────────────── */
.lang-picker {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.14);
  color: var(--text-secondary);
  padding: 5px 26px 5px 9px;
  border-radius: 7px;
  font-size: 12px;
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='10' height='10' viewBox='0 0 10 10' fill='none'><path d='M2 4l3 3 3-3' stroke='%23a1a1aa' stroke-width='1.4' stroke-linecap='round' stroke-linejoin='round'/></svg>");
  background-repeat: no-repeat;
  background-position: right 8px center;
  transition: border-color var(--dur-hover) var(--ease-out), color var(--dur-hover) var(--ease-out);
}
.lang-picker:hover {
  border-color: rgba(255, 255, 255, 0.3);
  color: var(--text-primary);
}
.lang-picker:focus { outline: none; border-color: rgba(139, 92, 246, 0.5); }
.lang-picker option { background: #18181B; color: #fafafa; }

/* Auth pages (light theme) lang picker is overridden in auth-pages.css */

.nav-login {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 13px;
  transition: color var(--dur-hover) var(--ease-out);
}
.nav-login:hover { color: var(--text-primary); }
.nav-user {
  color: var(--text-muted);
  font-size: 12px;
  letter-spacing: 0.01em;
  white-space: nowrap;
  max-width: 200px;
  overflow: hidden;
  text-overflow: ellipsis;
}
.nav-cta {
  font-size: 13px;
  padding: 8px 16px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* ============================================================
   Shared CTA buttons
============================================================ */
.cta-primary {
  background: var(--iridescent);
  background-size: 200% 200%;
  color: white;
  text-decoration: none;
  padding: 12px 22px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  border: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  animation: shimmer 4s ease-in-out infinite;
  box-shadow: 0 0 30px rgba(139,92,246,0.35);
  transition: transform 200ms var(--ease-out), box-shadow 200ms var(--ease-out);
}
.cta-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 0 50px rgba(139,92,246,0.55);
}
.cta-primary .cta-aside {
  font-size: 12px;
  opacity: 0.85;
  border-left: 1px solid rgba(255,255,255,0.4);
  padding-left: 8px;
}
.cta-ghost {
  background: rgba(255,255,255,0.04);
  color: var(--text-primary);
  text-decoration: none;
  padding: 12px 20px;
  border-radius: 999px;
  font-size: 14px;
  border: 1px solid var(--border-soft);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 200ms var(--ease-out);
}
.cta-ghost:hover {
  background: rgba(139,92,246,0.10);
  border-color: rgba(139,92,246,0.4);
}

/* Section header (kicker / title / sub) */
.sec-head {
  max-width: 800px;
  margin: 0 auto 48px;
  text-align: center;
  padding: 0 24px;
}
.kicker {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--accent-violet);
  margin-bottom: 12px;
}
.sec-title {
  font-size: 40px;
  font-weight: 700;
  line-height: 1.15;
  margin: 0 0 12px;
  color: var(--text-primary);
}
.sec-sub {
  font-size: 13px;
  color: var(--text-muted);
  margin: 0;
}

/* ============================================================
   2. Hero
============================================================ */
.hero {
  position: relative;
  padding: 32px 0 48px;
  overflow: hidden;
}
/* Very subtle dot grid background — Vercel-style, intentionally faint */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 1px 1px, rgba(167, 139, 250, 0.08) 1px, transparent 0);
  background-size: 32px 32px;
  mask-image: radial-gradient(ellipse at 50% 30%, rgba(0,0,0,0.7) 0%, rgba(0,0,0,0) 70%);
  -webkit-mask-image: radial-gradient(ellipse at 50% 30%, rgba(0,0,0,0.7) 0%, rgba(0,0,0,0) 70%);
  pointer-events: none;
  z-index: 0;
}
.hero-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 64px 64px 32px;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 48px;
  align-items: center;         /* 左右两栏现在高度接近，自然居中对齐 */
  position: relative;
  z-index: 1;
}
.hero-copy { max-width: 580px; }       /* natural top-down flow, no grid */
.hero-main { /* container for H1 cluster — no special positioning */ }
.hero-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(38px, 5vw, 72px);
  line-height: 1.04;
  letter-spacing: -0.035em;
  margin: 0 0 24px;
  color: var(--text-primary);
}
.hero-title-line {
  display: block;
  white-space: nowrap;     /* prevent "0 加价" wrapping mid-phrase */
}
.hero-title .accent {
  background: var(--iridescent);
  background-clip: text;
  -webkit-background-clip: text;
  color: transparent;
  background-size: 200% 200%;
  animation: shimmer 5s ease-in-out infinite;
}
.hero-sub {
  font-size: 19px;
  color: var(--text-secondary);
  line-height: 1.55;
  margin: 0 0 8px;
  max-width: 520px;
}
.hero-sub-en {
  font-size: 13px;
  color: var(--text-muted);
  margin: 0 0 28px;
  letter-spacing: 0.02em;
}
.hero-cta-row {
  display: flex;
  gap: 12px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}
.hero-trust-mini {
  display: flex;
  gap: 10px;
  font-size: 12px;
  color: var(--text-muted);
  flex-wrap: wrap;
}
.hero-trust-mini .dot { color: var(--text-faint); }

/* Hero stage (right side) */
.hero-stage {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 0;
  padding-top: 8px;
}

/* ╔═════════════════════════════════════════════════════════════╗
   ║  Prism — 丝滑流光版（用户称为"第 4 版"）                      ║
   ║  静态棱镜 + 内部色循环 + 7 道光持续滚动                        ║
   ║  没有 stage 化爆开、没有 opacity pulse、没有旋转              ║
   ╚═════════════════════════════════════════════════════════════╝ */

.prism-stage {
  position: relative;
  width: 100%;
  height: 280px;            /* taller for vertical centering breathing room */
  margin-bottom: 0;
}
.prism-orbit {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}
.prism-glass {
  width: 160px;             /* 200 → 160 — 棱镜不再是大灯 */
  height: 160px;
  filter: drop-shadow(0 0 14px rgba(139,92,246,0.22)) drop-shadow(0 0 28px rgba(6,182,212,0.10));
}
.prism-svg { width: 100%; height: 100%; }

.prism-glow {
  position: absolute;
  left: 50%; top: 50%;
  width: 360px; height: 160px;
  transform: translate(-50%, -50%);
  background: radial-gradient(ellipse at center, rgba(139,92,246,0.13), transparent 65%);
  filter: blur(40px);
  pointer-events: none;
}

/* Incoming beam — hairline white line with continuous flow */
.prism-beam {
  position: absolute;
  top: 50%; left: 0;
  width: calc(50% - 50px);
  height: 1.2px;
  transform: translateY(-50%);
  pointer-events: none;
  background: linear-gradient(to right,
    transparent 0%,
    rgba(255,255,255,0.0) 30%,
    rgba(255,255,255,0.65) 75%,
    rgba(255,255,255,0.85) 100%);
  background-size: 220% 100%;
  background-position: 100% 0;
  animation: stream 5s linear infinite;
}

/* 3 dispersed rays — restrained spectrum (violet / cyan / pink), tighter angles */
.prism-ray {
  position: absolute;
  top: 50%; left: calc(50% + 50px);
  width: 160px;            /* 220 → 160 — 不再占满右半屏 */
  height: 1.2px;
  transform-origin: 0 50%;
  border-radius: 2px;
  background-size: 220% 100%;
  background-position: 100% 0;
  animation: stream 5s linear infinite;
  opacity: 0.55;           /* 0.85 → 0.55 — 克制 */
  filter: drop-shadow(0 0 4px currentColor);
}
.prism-ray.r1 { color: #8B5CF6; background-image: linear-gradient(to right, transparent 0%, transparent 35%, #8B5CF6 80%, #8B5CF6 100%); transform: translateY(-50%) rotate(-12deg); animation-delay: -0.05s; }
.prism-ray.r4 { color: #06B6D4; background-image: linear-gradient(to right, transparent 0%, transparent 35%, #06B6D4 80%, #06B6D4 100%); transform: translateY(-50%) rotate(0deg);   animation-delay: -0.15s; }
.prism-ray.r7 { color: #EC4899; background-image: linear-gradient(to right, transparent 0%, transparent 35%, #EC4899 80%, #EC4899 100%); transform: translateY(-50%) rotate(12deg);  animation-delay: -0.25s; }

/* Continuous gradient slide — the silky stream */
@keyframes stream {
  from { background-position: 100% 0; }
  to   { background-position: -120% 0; }
}

/* ── Eyebrow status badge (above H1, fills empty space top-left) */
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 14px 6px 12px;
  border-radius: 999px;
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.08);
  margin-bottom: 22px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-secondary);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: border-color 200ms;
}
.hero-eyebrow:hover { border-color: rgba(255,255,255,0.18); }
.eyebrow-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--accent-green);
  box-shadow: 0 0 0 0 rgba(16,185,129,0.6);
  animation: eyebrow-pulse 2.6s cubic-bezier(0.4, 0, 0.6, 1) infinite;
  flex-shrink: 0;
}
@keyframes eyebrow-pulse {
  0%   { box-shadow: 0 0 0 0 rgba(16,185,129,0.55); }
  70%  { box-shadow: 0 0 0 8px rgba(16,185,129,0); }
  100% { box-shadow: 0 0 0 0 rgba(16,185,129,0); }
}

/* Model swap card */
/* Demo strip — separate row below hero, centered card */
.hero-demo {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 64px 48px;
  position: relative;
  z-index: 1;
}
.hero-demo .model-swap-card {
  max-width: 1100px;        /* 880 → 1100 — 视觉宽度更接近 hero 上半部 */
  margin: 0 auto;
  padding: 20px 24px;
}

.model-swap-card {
  position: relative;
  background: rgba(11, 11, 31, 0.65);
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-lg);
  padding: 16px;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}
.msc-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 12px;
}
.msc-pill {
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 12.5px;
  cursor: pointer;
  transition: all var(--dur-hover) var(--ease-out);
  font-family: var(--font-display);
  letter-spacing: -0.01em;
}
.msc-pill:hover {
  color: var(--text-primary);
  border-color: var(--border-soft);
}
.msc-pill.active {
  color: var(--text-primary);
  background: rgba(139,92,246,0.18);
  border-color: rgba(139,92,246,0.55);
  box-shadow: 0 0 20px rgba(139,92,246,0.25);
}

/* Code window */
.code-window {
  background: #08081A;
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-md);
  overflow: hidden;
  margin-bottom: 12px;
}
.cw-chrome {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  border-bottom: 1px solid var(--border-subtle);
  background: rgba(0,0,0,0.4);
}
.cw-dot { width: 10px; height: 10px; border-radius: 999px; }
.cw-dot.d1 { background: #FF5F57; }
.cw-dot.d2 { background: #FEBC2E; }
.cw-dot.d3 { background: #28C840; }
.cw-title {
  margin-left: 12px;
  font-size: 11px;
  color: var(--text-muted);
  letter-spacing: 0.04em;
}
.code-body {
  padding: 14px 16px;
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--text-primary);
  margin: 0;
  white-space: pre-wrap;
  overflow-x: auto;
}
.cw-highlight {
  background: rgba(139,92,246,0.18);
  color: #c4b5fd;
  border-radius: 4px;
  padding: 0 4px;
  animation: hl-flash 0.6s ease-out;
}
@keyframes hl-flash {
  0% { background: rgba(245,158,11,0.4); }
  100% { background: rgba(139,92,246,0.18); }
}

/* Stat tiles */
.msc-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  margin-bottom: 12px;
}
.stat-tile {
  background: rgba(0,0,0,0.25);
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-sm);
  padding: 8px 10px;
}
.stat-k {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  font-size: 11px;
  color: var(--text-muted);
  margin-bottom: 4px;
}
.stat-en {
  font-size: 9px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-faint);
}
.stat-v {
  font-size: 14px;
  color: var(--text-primary);
  font-family: var(--font-display);
  font-weight: 600;
}
.stat-unit {
  font-size: 10px;
  color: var(--text-muted);
  margin-left: 2px;
  font-weight: 400;
}

.msc-caption {
  display: flex;
  align-items: center;
  gap: 6px;
  margin: 0;
  font-size: 11.5px;
  color: var(--text-muted);
}
.msc-caption code {
  background: rgba(139,92,246,0.10);
  padding: 1px 5px;
  border-radius: 4px;
  font-size: 11px;
  color: #c4b5fd;
}
.msc-arrow { color: var(--accent-violet); font-weight: 600; }

/* Provider marquee */
.provider-marquee {
  margin: 32px 0 0;
  overflow: hidden;
  position: relative;
  mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
  -webkit-mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
}
.pm-track {
  display: flex;
  gap: 32px;
  animation: pm-scroll 50s linear infinite;
  padding: 12px 0;
  width: max-content;
}
@keyframes pm-scroll {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}
.pm-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
  font-size: 13px;
  white-space: nowrap;
  opacity: 0.65;
}
.pm-glyph {
  width: 22px; height: 22px;
  border-radius: 6px;
  border: 1px solid;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 12px;
  color: rgba(255,255,255,0.85);
}

/* ============================================================
   3. Trust strip
============================================================ */
.trust-strip {
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  background: rgba(11,11,31,0.4);
  padding: 28px 0;
  margin-top: 32px;
}
.trust-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 64px;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0;
  align-items: center;
}
.trust-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 4px 16px;
  position: relative;
}
.trust-item:not(:last-child)::after {
  content: '';
  position: absolute;
  right: 0; top: 20%; bottom: 20%;
  width: 1px;
  background: var(--border-subtle);
}
.trust-num {
  font-size: 30px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}
.trust-item.highlight .trust-num {
  background: var(--iridescent);
  background-clip: text;
  -webkit-background-clip: text;
  color: transparent;
  background-size: 200% 200%;
  animation: shimmer 4s ease-in-out infinite;
}
.trust-label {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}
.trust-label > span:first-child { font-size: 13px; color: var(--text-secondary); }
.trust-en { font-size: 10px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.06em; }

/* ============================================================
   4. Features
============================================================ */
.features {
  max-width: 1280px;
  margin: 96px auto 0;
  padding: 0 64px;
}
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.feature-card {
  position: relative;
  padding: 24px;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-lg);
  overflow: hidden;
  transition: transform 200ms var(--ease-out), border-color 200ms var(--ease-out);
}
.feature-card:hover {
  transform: translateY(-3px);
  border-color: rgba(139,92,246,0.35);
}
.feature-card:hover .feature-glow { opacity: 1; }
.feature-glow {
  position: absolute;
  inset: -60% -10% auto auto;
  width: 60%; height: 200%;
  background: radial-gradient(ellipse at top right, rgba(139,92,246,0.18), transparent 70%);
  pointer-events: none;
  opacity: 0;
  transition: opacity 300ms var(--ease-out);
}
.feature-icon {
  display: inline-flex;
  width: 44px; height: 44px;
  border-radius: var(--r-sm);
  align-items: center;
  justify-content: center;
  background: rgba(139,92,246,0.10);
  border: 1px solid rgba(139,92,246,0.25);
  margin-bottom: 16px;
}
.feature-title {
  font-size: 18px;
  font-weight: 600;
  margin: 0 0 10px;
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-wrap: wrap;
}
.feature-en {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  font-weight: 400;
}
.feature-body {
  font-size: 13.5px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin: 0;
}

/* ============================================================
   5. Live demo
============================================================ */
.live-demo {
  max-width: 1280px;
  margin: 96px auto 0;
  padding: 0 64px;
}
.ld-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 20px;
}
.ld-code {
  background: #08081A;
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-lg);
  overflow: hidden;
}
.ld-tabs {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 8px 12px;
  border-bottom: 1px solid var(--border-subtle);
  background: rgba(0,0,0,0.4);
}
.ld-tab {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  padding: 6px 12px;
  font-size: 12px;
  border-radius: 6px;
  cursor: pointer;
  transition: all var(--dur-hover) var(--ease-out);
}
.ld-tab.active {
  background: var(--bg-elevated-2);
  color: var(--text-primary);
}
.ld-copy {
  margin-left: auto;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  padding: 5px 10px;
  font-size: 11px;
  border-radius: 6px;
  cursor: pointer;
}
.ld-copy:hover { color: var(--text-primary); }
.ld-block {
  padding: 18px 20px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-primary);
  margin: 0;
  white-space: pre;
  overflow-x: auto;
  min-height: 280px;
}
.ld-terminal {
  background: #08081A;
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-lg);
  display: flex;
  flex-direction: column;
}
.ld-term-head {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-bottom: 1px solid var(--border-subtle);
  background: rgba(0,0,0,0.4);
}
.ld-term-head .cw-title { margin-left: 10px; }
.ld-streaming {
  margin-left: auto;
  font-size: 10.5px;
  color: var(--accent-green);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.ld-streaming-dot {
  width: 6px; height: 6px;
  background: var(--accent-green);
  border-radius: 999px;
  animation: pulse-dot 1s ease-in-out infinite;
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}
.ld-term-body {
  flex: 1;
  padding: 18px 20px;
  font-size: 13px;
  line-height: 1.75;
  color: var(--text-primary);
  min-height: 220px;
}
.ld-prompt { color: var(--accent-violet); margin-right: 8px; }
.ld-stream { color: var(--text-secondary); margin-top: 6px; white-space: pre-wrap; }
.ld-caret {
  display: inline-block;
  width: 7px;
  height: 14px;
  background: var(--accent-violet);
  margin-left: 2px;
  vertical-align: middle;
  animation: blink 1s steps(2) infinite;
}
@keyframes blink { 50% { opacity: 0; } }
.ld-term-foot {
  display: flex;
  gap: 8px;
  padding: 10px 14px;
  border-top: 1px solid var(--border-subtle);
  background: rgba(0,0,0,0.25);
  font-size: 11px;
  color: var(--text-muted);
  flex-wrap: wrap;
}
.ld-term-foot .dot { color: var(--text-faint); }
.ld-term-foot em { color: var(--text-secondary); font-style: normal; }

/* ============================================================
   6. Client strip
============================================================ */
.clients {
  max-width: 1280px;
  margin: 96px auto 0;
  padding: 0 64px;
}
.client-row {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 12px;
}
.client-tile {
  position: relative;
  height: 88px;
  perspective: 600px;
  cursor: pointer;
}
.client-front, .client-back {
  position: absolute;
  inset: 0;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 8px;
  backface-visibility: hidden;
  transition: transform 380ms var(--ease-out), border-color 200ms;
  padding: 10px;
}
.client-front { transform: rotateY(0deg); }
.client-back  {
  transform: rotateY(180deg);
  font-size: 10.5px;
  color: var(--text-secondary);
  text-align: center;
  padding: 10px 12px;
  line-height: 1.45;
  word-break: break-all;
}
.client-tile.flipped .client-front { transform: rotateY(-180deg); }
.client-tile.flipped .client-back  { transform: rotateY(0deg); }
.client-tile.flipped .client-back, .client-tile.flipped .client-front {
  border-color: rgba(139,92,246,0.4);
}
.client-glyph {
  width: 28px; height: 28px;
  border-radius: 8px;
  border: 1px solid;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 14px;
  color: rgba(255,255,255,0.85);
}
.client-name { font-size: 13px; color: var(--text-secondary); }

/* ============================================================
   7. Categories
============================================================ */
.categories {
  max-width: 1280px;
  margin: 96px auto 0;
  padding: 0 64px;
}
.cat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.cat-card {
  position: relative;
  padding: 24px;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-lg);
  overflow: hidden;
  transition: transform 200ms var(--ease-out), border-color 200ms var(--ease-out);
}
.cat-card:hover {
  transform: translateY(-3px);
  border-color: rgba(6,182,212,0.35);
}
.cat-card:hover .cat-glow { opacity: 1; }
.cat-glow {
  position: absolute;
  inset: auto -10% -60% auto;
  width: 60%; height: 100%;
  background: radial-gradient(ellipse at bottom right, rgba(6,182,212,0.15), transparent 70%);
  pointer-events: none;
  opacity: 0;
  transition: opacity 300ms var(--ease-out);
}
.cat-head {
  margin-bottom: 16px;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 14px;
}
.cat-title {
  font-size: 20px;
  font-weight: 700;
  margin: 0 0 6px;
  display: flex;
  align-items: baseline;
  gap: 10px;
}
.cat-en {
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 400;
}
.cat-why { font-size: 12.5px; color: var(--text-muted); margin: 0; }
.cat-picks { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 12px; }
.cat-pick {
  display: flex;
  gap: 10px;
  align-items: flex-start;
}
.cat-pick-glyph { flex-shrink: 0; }
.cat-pick-body { flex: 1; min-width: 0; }
.cat-pick-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
}
.cat-pick-name {
  font-size: 13.5px;
  color: var(--text-primary);
  font-weight: 600;
  font-family: var(--font-display);
}
.cat-pick-price {
  font-size: 11px;
  color: var(--accent-amber);
  white-space: nowrap;
}
.cat-pick-tip {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 2px;
  line-height: 1.5;
}
.cat-foot {
  text-align: center;
  margin-top: 28px;
}

/* ============================================================
   8. Channel banner
============================================================ */
.channels {
  max-width: 1280px;
  margin: 96px auto 0;
  padding: 0 64px;
}
.ch-toggle {
  display: flex;
  justify-content: center;
  gap: 6px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: 999px;
  padding: 4px;
  width: fit-content;
  margin: 0 auto 32px;
}
.ch-tog-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  padding: 8px 18px;
  font-size: 13px;
  border-radius: 999px;
  cursor: pointer;
  font-family: var(--font-display);
  transition: all var(--dur-hover) var(--ease-out);
}
.ch-tog-btn:hover { color: var(--text-primary); }
.ch-tog-btn.active {
  background: rgba(139,92,246,0.20);
  color: var(--text-primary);
  box-shadow: 0 0 16px rgba(139,92,246,0.25);
}

.ch-flow {
  display: grid;
  grid-template-columns: auto auto 1fr;
  align-items: center;
  gap: 16px;
  background: rgba(11,11,31,0.5);
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-lg);
  padding: 32px 36px;
  position: relative;
  overflow: hidden;
}
.ch-flow::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, rgba(139,92,246,0.08), transparent 70%);
  pointer-events: none;
}

.ch-node {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 16px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-md);
  min-width: 120px;
  position: relative;
  z-index: 1;
}
.ch-node.prism { border-color: rgba(139,92,246,0.4); box-shadow: 0 0 30px rgba(139,92,246,0.2); }
.ch-node-icon {
  width: 36px; height: 36px;
  border-radius: 999px;
  background: rgba(139,92,246,0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #c4b5fd;
}
.ch-node-label { font-size: 13px; color: var(--text-primary); font-family: var(--font-display); font-weight: 600; }
.ch-node-en { font-size: 10px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.06em; }

.ch-line {
  position: relative;
  width: 60px;
  height: 1.5px;
  background: linear-gradient(to right, rgba(139,92,246,0.5), rgba(6,182,212,0.5));
}
.ch-line::before, .ch-line::after {
  content: '';
  position: absolute;
  width: 6px; height: 6px;
  border-radius: 999px;
  background: rgba(255,255,255,0.7);
  top: 50%; transform: translateY(-50%);
  animation: ch-flow-dot 1.8s ease-in-out infinite;
}
.ch-line::before { left: 0; }
.ch-line::after { left: 30%; animation-delay: 0.6s; }
@keyframes ch-flow-dot {
  0% { left: 0; opacity: 0; }
  10% { opacity: 1; }
  100% { left: 100%; opacity: 0; }
}

.ch-arc {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  position: relative;
  z-index: 1;
}
.ch-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-md);
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: all 220ms var(--ease-out);
}
.ch-card:hover {
  border-color: rgba(139,92,246,0.4);
  transform: translateY(-2px);
}
.ch-card.arc-1 { transform: translateY(-12px); }
.ch-card.arc-3 { transform: translateY(12px); }
.ch-card.arc-1:hover { transform: translateY(-14px); }
.ch-card.arc-3:hover { transform: translateY(10px); }

.ch-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}
.ch-card-name {
  font-size: 13px;
  color: var(--text-primary);
  font-weight: 600;
  font-family: var(--font-display);
}
.ch-health {
  font-size: 10px;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 2px 8px;
  border-radius: 999px;
  border: 1px solid;
}
.ch-health.h-ok { color: var(--accent-green); border-color: rgba(16,185,129,0.4); background: rgba(16,185,129,0.08); }
.ch-health.h-degraded { color: var(--accent-amber); border-color: rgba(245,158,11,0.4); background: rgba(245,158,11,0.08); }
.ch-card-meta {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 4px;
  font-size: 11px;
}
.ch-card-meta > div { display: flex; flex-direction: column; gap: 1px; }
.meta-k { font-size: 9px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.06em; }
.meta-v { font-size: 11.5px; color: var(--text-secondary); }
.ch-card-policy {
  font-size: 11px;
  color: var(--text-muted);
  padding-top: 6px;
  border-top: 1px solid var(--border-subtle);
}
.ch-weight-bar {
  height: 3px;
  background: rgba(255,255,255,0.05);
  border-radius: 2px;
  overflow: hidden;
}
.ch-weight-fill {
  height: 100%;
  background-size: 200% 200%;
  animation: shimmer 4s ease-in-out infinite;
}

.ch-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 16px;
  padding: 0 8px;
  font-size: 12.5px;
  color: var(--text-muted);
  flex-wrap: wrap;
  gap: 8px;
}
.link-arrow {
  color: var(--accent-cyan);
  text-decoration: none;
  font-size: 12.5px;
}
.link-arrow:hover { color: var(--text-primary); }

/* ============================================================
   9. Not doing
============================================================ */
.not-doing {
  max-width: 1280px;
  margin: 96px auto 0;
  padding: 0 64px;
}
.nd-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.nd-card {
  position: relative;
  padding: 24px 20px;
  background: rgba(11,11,31,0.6);
  border: 1px solid rgba(236,72,153,0.16);
  border-radius: var(--r-lg);
  overflow: hidden;
}
.nd-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(to right, transparent, rgba(236,72,153,0.5), transparent);
}
.nd-cross {
  width: 36px; height: 36px;
  border-radius: 999px;
  background: rgba(236,72,153,0.10);
  border: 1px solid rgba(236,72,153,0.3);
  color: #f472b6;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  font-size: 16px;
  font-weight: 600;
}
.nd-title {
  font-size: 16px;
  font-weight: 600;
  margin: 0 0 10px;
  color: var(--text-primary);
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.nd-en { font-size: 10.5px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.06em; font-weight: 400; }
.nd-body { font-size: 12.5px; color: var(--text-secondary); line-height: 1.65; margin: 0; }

/* ============================================================
   10. Pricing
============================================================ */
.pricing {
  max-width: 1280px;
  margin: 96px auto 0;
  padding: 0 64px;
}
.price-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 32px;
}
.price-grid.price-grid-2 {
  grid-template-columns: repeat(2, 1fr);
  max-width: 880px;
  margin-left: auto;
  margin-right: auto;
}
.price-card {
  position: relative;
  padding: 28px 24px;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-lg);
  display: flex;
  flex-direction: column;
  gap: 18px;
  overflow: hidden;
  transition: transform 200ms var(--ease-out), border-color 200ms var(--ease-out);
}
.price-card:hover { transform: translateY(-3px); }
.price-card.featured {
  border-color: transparent;
  box-shadow: 0 0 0 1.5px rgba(139,92,246,0.5), 0 0 60px rgba(139,92,246,0.18);
}
.price-card.featured::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--r-lg);
  padding: 1.5px;
  background: var(--iridescent);
  background-size: 200% 200%;
  -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;
  animation: shimmer 5s ease-in-out infinite;
}
.price-ribbon {
  position: absolute;
  top: 14px; right: 14px;
  background: var(--iridescent);
  background-size: 200% 200%;
  color: white;
  font-size: 10.5px;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 999px;
  letter-spacing: 0.04em;
  animation: shimmer 4s ease-in-out infinite;
}
.price-glow {
  position: absolute;
  inset: -50% auto auto -10%;
  width: 80%; height: 200%;
  background: radial-gradient(ellipse at top left, rgba(139,92,246,0.18), transparent 70%);
  pointer-events: none;
}
.price-head {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.price-tier { font-size: 18px; font-weight: 700; color: var(--text-primary); }
.price-cost-eq {
  font-size: 10px;
  color: var(--accent-cyan);
  text-transform: uppercase;
  letter-spacing: 0.12em;
}
.price-amount {
  font-size: 32px;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1;
  margin-top: 4px;
}
.price-tagline { font-size: 12.5px; color: var(--text-muted); }
.price-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 9px;
}
.price-li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12.5px;
  color: var(--text-secondary);
}

/* Calculator */
.price-calc {
  background: rgba(11,11,31,0.55);
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-lg);
  padding: 24px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}
.pc-head { display: flex; flex-direction: column; gap: 4px; }
.pc-title { font-size: 22px; font-weight: 700; margin: 0; color: var(--text-primary); }
.pc-controls {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 14px;
  align-items: end;
}
.pc-field { display: flex; flex-direction: column; gap: 6px; }
.pc-label { font-size: 11px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.08em; font-family: var(--font-mono); }
.pc-input {
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-md);
  color: var(--text-primary);
  padding: 10px 12px;
  font-size: 13px;
  outline: none;
  transition: all var(--dur-hover) var(--ease-out);
}
.pc-input:focus { border-color: var(--border-glow); box-shadow: 0 0 0 3px rgba(139,92,246,0.12); }
.pc-result {
  background: var(--bg-elevated);
  border: 1px solid rgba(139,92,246,0.3);
  border-radius: var(--r-md);
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.pc-result-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  font-size: 13px;
  color: var(--text-secondary);
}
.pc-num { font-size: 22px; color: var(--text-primary); font-weight: 700; }
.pc-result-secondary { font-size: 11px; color: var(--text-muted); }
.pc-note {
  font-size: 11.5px;
  color: var(--text-muted);
  border-top: 1px solid var(--border-subtle);
  padding-top: 14px;
  line-height: 1.6;
}
.pc-note code {
  background: rgba(6,182,212,0.10);
  color: #67e8f9;
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 11px;
}

/* ── Payment methods row ─────────────────────────────── */
.pay-row {
  margin-top: 32px;
  background: rgba(11,11,31,0.55);
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-lg);
  padding: 28px;
}
.pay-head { margin-bottom: 18px; }
.pay-title {
  font-size: 22px;
  font-weight: 700;
  margin: 4px 0 4px;
  color: var(--text-primary);
}
.pay-sub {
  font-size: 12px;
  color: var(--text-muted);
  margin: 0;
}
.pay-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
.pay-card {
  position: relative;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-md);
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: all 200ms var(--ease-out);
  min-height: 120px;
}
.pay-card:hover {
  border-color: rgba(139,92,246,0.4);
  transform: translateY(-2px);
}
.pay-card-crypto {
  grid-column: span 1;
  background: linear-gradient(135deg, rgba(139,92,246,0.08), rgba(6,182,212,0.06));
  border-color: rgba(139,92,246,0.25);
}
.pay-card-head {
  display: flex;
  align-items: center;
  gap: 10px;
}
.pay-icon {
  width: 36px; height: 36px;
  border-radius: 8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  color: white;
  flex-shrink: 0;
}
.pay-icon-alipay { background: linear-gradient(135deg, #1677ff, #0a5fcc); }
.pay-icon-wechat { background: linear-gradient(135deg, #07c160, #058a45); }
.pay-icon-bank   { background: linear-gradient(135deg, #f59e0b, #d97706); }
.pay-icon-stripe { background: linear-gradient(135deg, #635bff, #4f48cc); }
.pay-icon-trc {
  background: linear-gradient(135deg, #FF060A, #C00B12);
  font-size: 17px;
  font-weight: 800;
}
.pay-icon-sol {
  background: linear-gradient(135deg, #9945FF, #14F195);
  font-size: 18px;
}
.pay-icon-evm {
  background: linear-gradient(135deg, #627EEA, #3C53A8);
  font-size: 18px;
}
.pay-card-pill {
  display: inline-block;
  font-size: 9.5px;
  font-family: var(--font-mono);
  background: var(--iridescent);
  background-size: 200% 200%;
  color: white;
  padding: 1px 6px;
  border-radius: 999px;
  margin-left: 6px;
  letter-spacing: 0.04em;
  vertical-align: middle;
  animation: shimmer 4s ease-in-out infinite;
}
.pay-card-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  font-family: var(--font-display);
  line-height: 1.2;
}
.pay-card-en {
  font-size: 10px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-top: 2px;
}
.pay-card-desc {
  font-size: 11.5px;
  color: var(--text-secondary);
  line-height: 1.5;
}
.pay-badge {
  display: inline-block;
  font-size: 9.5px;
  color: var(--accent-amber);
  border: 1px solid rgba(245,158,11,0.3);
  background: rgba(245,158,11,0.08);
  padding: 1px 8px;
  border-radius: 999px;
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
  width: fit-content;
}
.pay-addr-row {
  display: flex;
  align-items: center;
  gap: 6px;
  background: rgba(0,0,0,0.35);
  border: 1px solid var(--border-subtle);
  border-radius: 6px;
  padding: 6px 8px;
}
.pay-addr {
  flex: 1;
  font-size: 10px;
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.pay-copy {
  background: rgba(139,92,246,0.15);
  border: 1px solid rgba(139,92,246,0.3);
  color: #c4b5fd;
  font-size: 10px;
  padding: 3px 8px;
  border-radius: 4px;
  cursor: pointer;
  flex-shrink: 0;
  transition: all 150ms var(--ease-out);
}
.pay-copy:hover {
  background: rgba(139,92,246,0.3);
  color: var(--text-primary);
}
.pay-warn {
  font-size: 10.5px;
  color: var(--accent-amber);
  line-height: 1.4;
}
.pay-foot {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--border-subtle);
  font-size: 11px;
  color: var(--text-muted);
  text-align: center;
}
.pay-foot a {
  color: var(--accent-cyan);
  text-decoration: none;
}
.pay-foot a:hover { color: var(--text-primary); }

/* ============================================================
   11. FAQ
============================================================ */
.faq {
  max-width: 880px;
  margin: 96px auto 0;
  padding: 0 64px;
}
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.faq-item {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-md);
  overflow: hidden;
  transition: border-color 200ms var(--ease-out);
}
.faq-item.open { border-color: rgba(139,92,246,0.35); }
.faq-q {
  width: 100%;
  background: transparent;
  border: none;
  color: var(--text-primary);
  text-align: left;
  padding: 16px 20px;
  font-size: 14px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  font-family: var(--font-display);
  font-weight: 500;
}
.faq-q-text { flex: 1; }
.faq-q-icon {
  width: 22px; height: 22px;
  border-radius: 999px;
  background: var(--bg-elevated);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  color: var(--text-secondary);
  flex-shrink: 0;
}
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 320ms var(--ease-out);
}
.faq-item.open .faq-a { max-height: 240px; }
.faq-a p {
  margin: 0;
  padding: 0 20px 18px;
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ============================================================
   12. Final CTA
============================================================ */
.final-cta {
  max-width: 1280px;
  margin: 96px auto 0;
  padding: 0 64px;
}
.fcta-card {
  position: relative;
  background: linear-gradient(135deg, rgba(139,92,246,0.18), rgba(6,182,212,0.12), rgba(236,72,153,0.10));
  border: 1px solid rgba(139,92,246,0.35);
  border-radius: 24px;
  padding: 56px 48px;
  text-align: center;
  overflow: hidden;
}
.fcta-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, rgba(139,92,246,0.10), transparent 70%);
  pointer-events: none;
}
.fcta-eyebrow {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--accent-cyan);
  margin-bottom: 16px;
}
.fcta-title {
  font-size: 40px;
  font-weight: 800;
  margin: 0 0 12px;
  color: var(--text-primary);
}
.fcta-sub {
  font-size: 14px;
  color: var(--text-secondary);
  margin: 0 0 28px;
}
.fcta-row {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}
.fcta-glow {
  position: absolute;
  left: 50%; top: 50%;
  width: 80%; height: 200%;
  transform: translate(-50%, -50%);
  background: radial-gradient(ellipse at center, rgba(139,92,246,0.12), transparent 70%);
  pointer-events: none;
}

/* ============================================================
   13. Footer
============================================================ */
.footer {
  margin-top: 120px;
  border-top: 1px solid var(--border-subtle);
  background: rgba(5,5,16,0.5);
}
.footer-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 56px 64px 32px;
  display: grid;
  grid-template-columns: 1.2fr 3fr;
  gap: 48px;
}
.footer-brand { display: flex; gap: 12px; align-items: flex-start; }
.footer-brand-name { font-size: 18px; color: var(--text-primary); margin-bottom: 4px; }
.footer-brand-tag { font-size: 12px; color: var(--text-muted); }
.footer-cols {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.fcol-title {
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 14px;
}
.fcol ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.fcol a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 13px;
  transition: color var(--dur-hover) var(--ease-out);
}
.fcol a:hover { color: var(--text-primary); }
.footer-bottom {
  max-width: 1280px;
  margin: 0 auto;
  padding: 16px 64px 40px;
  font-size: 11px;
  color: var(--text-muted);
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.footer-bottom .dot { color: var(--text-faint); }

/* ============================================================
   Responsive: tablet
============================================================ */
@media (max-width: 1024px) {
  .nav-inner, .hero-inner, .features, .live-demo, .clients, .categories,
  .channels, .not-doing, .pricing, .faq, .final-cta, .trust-inner, .footer-inner, .footer-bottom {
    padding-left: 32px;
    padding-right: 32px;
  }
  .hero-inner { grid-template-columns: 1fr; }
  .hero-stage { order: -1; max-width: 480px; }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .ld-grid { grid-template-columns: 1fr; }
  .client-row { grid-template-columns: repeat(3, 1fr); }
  .cat-grid { grid-template-columns: repeat(2, 1fr); }
  .ch-flow { grid-template-columns: 1fr; gap: 24px; padding: 24px; }
  .ch-line { display: none; }
  .ch-arc { grid-template-columns: 1fr; }
  .ch-card.arc-1, .ch-card.arc-3 { transform: none; }
  .nd-grid { grid-template-columns: repeat(2, 1fr); }
  .price-grid { grid-template-columns: 1fr; }
  .pc-controls { grid-template-columns: 1fr; }
  .pay-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-inner { grid-template-columns: 1fr; }
  .footer-cols { grid-template-columns: repeat(2, 1fr); }
  .trust-inner { grid-template-columns: repeat(3, 1fr); gap: 16px 0; }
  .trust-item:nth-child(3)::after { display: none; }
}

/* ============================================================
   Hamburger button (only visible ≤ 640px)
============================================================ */
.nav-burger {
  display: none;
  width: 40px; height: 40px;
  background: transparent;
  border: 1px solid rgba(255,255,255,0.10);
  border-radius: 8px;
  cursor: pointer;
  padding: 0;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 4px;
}
.nav-burger:hover { border-color: rgba(255,255,255,0.25); }
.nav-burger span {
  display: block;
  width: 18px; height: 1.6px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: opacity var(--dur-hover) var(--ease-out);
}

/* ============================================================
   Mobile drawer (full-screen overlay)
============================================================ */
.mobile-drawer {
  position: fixed; inset: 0;
  z-index: 999;
  background: rgba(5, 5, 16, 0.96);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  display: flex;
  flex-direction: column;
  padding: 20px 24px 32px;
  animation: drawerFadeIn 220ms var(--ease-out);
}
@keyframes drawerFadeIn {
  from { opacity: 0; transform: translateY(-8px); }
  to   { opacity: 1; transform: translateY(0); }
}
.mobile-drawer-head {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 28px;
}
.mobile-drawer-close {
  width: 44px; height: 44px;
  background: transparent;
  border: 1px solid rgba(255,255,255,0.10);
  border-radius: 10px;
  color: var(--text-primary);
  cursor: pointer;
  display: grid; place-items: center;
}
.mobile-drawer-close:hover { border-color: rgba(255,255,255,0.30); }
.mobile-drawer-links {
  display: flex; flex-direction: column;
  gap: 4px;
}
.mobile-drawer-links a {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 600;
  color: var(--text-primary);
  text-decoration: none;
  padding: 14px 4px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  transition: color var(--dur-hover) var(--ease-out);
}
.mobile-drawer-links a:hover { color: var(--accent-violet); }
.mobile-drawer-lang {
  margin-top: 24px;
  padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,0.06);
}
.mobile-drawer-lang .lang-picker {
  width: 100%;
  padding: 12px 32px 12px 14px;
  font-size: 14px;
}
.mobile-drawer-cta {
  margin-top: auto;
  padding-top: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.mobile-drawer-cta .cta-primary,
.mobile-drawer-cta .cta-ghost {
  width: 100%;
  justify-content: center;
  padding: 14px 18px;
  font-size: 15px;
}
.mobile-drawer-user {
  font-size: 12px;
  color: var(--text-muted);
  text-align: center;
  margin-bottom: -4px;
}

/* ============================================================
   Responsive: phone
============================================================ */
@media (max-width: 640px) {
  .nav-inner {
    display: flex !important;
    align-items: center;
    justify-content: space-between;
    padding: 14px 20px;
    grid-template-columns: unset;
  }
  .nav-links, .nav-right { display: none !important; }
  .nav-burger { display: flex; }

  .hero-inner, .features, .live-demo, .clients, .categories,
  .channels, .not-doing, .pricing, .faq, .final-cta, .trust-inner, .footer-inner, .footer-bottom {
    padding-left: 20px;
    padding-right: 20px;
  }
  .hero-title { font-size: 36px; }
  /* Mobile: hero-demo padding collapsed to match other sections */
  .hero-demo { padding: 0 20px 32px; }
  .hero-demo .model-swap-card { padding: 16px; }
  .features-grid { grid-template-columns: 1fr; }
  .client-row { grid-template-columns: repeat(2, 1fr); }
  .cat-grid { grid-template-columns: 1fr; }
  .nd-grid { grid-template-columns: 1fr; }
  .trust-inner { grid-template-columns: repeat(2, 1fr); }
  .trust-item::after { display: none !important; }
  .footer-cols { grid-template-columns: 1fr; }
  .sec-title { font-size: 28px; }
  .fcta-card { padding: 40px 24px; }
  .fcta-title { font-size: 28px; }
  .msc-stats { grid-template-columns: repeat(2, 1fr); }
  .pay-grid { grid-template-columns: 1fr; }
  .pay-row { padding: 20px; }

  /* Body 字号上调防止小字眯眼 */
  body { font-size: 15px; line-height: 1.55; }
}

/* ============================================================
   Responsive: narrow phone (≤ 480px)
============================================================ */
@media (max-width: 480px) {
  .hero-title { font-size: 28px; line-height: 1.15; }
  .hero-sub { font-size: 14px; }
  .hero-cta-row { flex-direction: column; gap: 10px; }
  .hero-cta-row .cta-primary,
  .hero-cta-row .cta-ghost { width: 100%; justify-content: center; }
  .hero-trust-mini { flex-wrap: wrap; gap: 8px; font-size: 12px; }
  .hero-trust-mini .dot { display: none; }
  .hero-stage { max-width: 100%; }
  .prism-stage { transform: scale(0.7); transform-origin: center top; }
  .prism-glow { display: none; }
  .hero-eyebrow { font-size: 10px; padding: 5px 12px 5px 10px; margin-bottom: 16px; }
  .model-swap-card { padding: 16px; }
  .msc-pills { overflow-x: auto; flex-wrap: nowrap; scroll-snap-type: x mandatory; padding-bottom: 4px; }
  .msc-pills::-webkit-scrollbar { display: none; }
  .msc-pill { flex-shrink: 0; scroll-snap-align: start; }
  .code-window { font-size: 11px; }
  .code-body { padding: 12px; font-size: 11px; }
  .msc-stats { gap: 8px; }
  .stat-tile { padding: 8px; }
  .stat-v { font-size: 16px; }

  .sec-head { margin-bottom: 32px; }
  .sec-title { font-size: 24px; }
  .sec-sub { font-size: 13px; }

  /* pricing 双卡变单列 */
  .price-grid-2 { grid-template-columns: 1fr; gap: 16px; }
  .price-card { padding: 28px 22px; }
  .price-amount { font-size: 28px; }
  .price-tier { font-size: 18px; }

  /* pricing 计算器 */
  .price-calc { padding: 24px 18px; }
  .pc-result-row { font-size: 13px; }
  .pc-num { font-size: 22px; }

  /* payment cards 单列 */
  .pay-grid { grid-template-columns: 1fr; gap: 12px; }
  .pay-card { padding: 16px; }
  .pay-card-title { font-size: 14px; }
  .pay-addr { font-size: 11px; word-break: break-all; }
  .pay-addr-row { flex-wrap: wrap; gap: 8px; }
  .pay-copy { width: 100%; }

  /* Live demo */
  .ld-block { font-size: 11px; padding: 12px; }
  .ld-term-body { font-size: 11px; padding: 12px; }

  /* Trust strip */
  .trust-num { font-size: 28px; }
  .trust-label { font-size: 11px; }

  /* Channel banner */
  .ch-toggle { flex-wrap: wrap; gap: 6px; }
  .ch-tog-btn { font-size: 11px; padding: 6px 10px; flex: 1 1 calc(50% - 6px); }
  .ch-card { padding: 16px; }

  /* Footer */
  .footer-inner { padding: 32px 20px; }
  .footer-bottom { flex-direction: column; gap: 6px; padding: 16px 20px; }
  .footer-bottom .dot { display: none; }

  /* CTA stacks */
  .fcta-row { flex-direction: column; gap: 10px; }
  .fcta-row .cta-primary, .fcta-row .cta-ghost { width: 100%; justify-content: center; }
  .fcta-card { padding: 32px 20px; }
  .fcta-title { font-size: 22px; }

  /* FAQ */
  .faq-q-text { font-size: 14px; }
  .faq-q { padding: 14px 12px; }

  /* Categories */
  .cat-card { padding: 22px 18px; }
}

/* ============================================================
   Responsive: tiny phone (≤ 360px)
============================================================ */
@media (max-width: 360px) {
  .nav-inner { padding: 12px 14px; }
  .nav-brand-zh { display: none; }

  .hero-inner, .features, .live-demo, .clients, .categories,
  .channels, .not-doing, .pricing, .faq, .final-cta, .trust-inner, .footer-inner {
    padding-left: 14px;
    padding-right: 14px;
  }
  .hero-title { font-size: 24px; }
  .hero-sub { font-size: 13px; }
  .sec-title { font-size: 21px; }
  .price-amount { font-size: 24px; }
  .fcta-title { font-size: 20px; }
  .cta-primary, .cta-ghost { font-size: 13px; padding: 12px 14px; }
  .trust-num { font-size: 24px; }
  .pay-card { padding: 14px; }
  .mobile-drawer-links a { font-size: 19px; }
}