/* 极客互动 · 蓝白风格企业微信门户 */
:root {
  --ink: #0f172a;
  --ink-soft: #1e293b;
  --slate: #475569;
  --muted: #64748b;
  --line: rgba(37, 99, 235, 0.12);
  --paper: #f8fbff;
  --white: #ffffff;
  --blue: #2563eb;
  --blue-deep: #1d4ed8;
  --blue-soft: rgba(37, 99, 235, 0.1);
  --blue-glow: rgba(37, 99, 235, 0.18);
  --sky: #eff6ff;
  --sky-2: #dbeafe;
  --navy: #0b1f4a;
  --accent: #3b82f6;
  --radius: 14px;
  --shadow: 0 18px 50px rgba(15, 23, 42, 0.08);
  /* 中文优先：系统高品质黑体，避免西文字体抢先导致中文回落难看 */
  --font-display: "HarmonyOS Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", "Noto Sans SC", "Source Han Sans SC", sans-serif;
  --font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", "Noto Sans SC", "Source Han Sans SC", sans-serif;
  --font-mono: "Cascadia Code", "Sarasa Mono SC", Consolas, "Courier New", monospace;
  --fs-xs: 0.75rem;
  --fs-sm: 0.875rem;
  --fs-base: 1rem;
  --fs-md: 1.0625rem;
  --fs-lg: 1.125rem;
  --fs-xl: 1.25rem;
  --lh-tight: 1.28;
  --lh-snug: 1.45;
  --lh-body: 1.75;
  --lh-loose: 1.85;
  --tracking-cn: 0.02em;
  --tracking-label: 0.08em;
  --max: 1180px;
  --nav-h: 72px;
}

*,
*::before,
*::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  text-size-adjust: 100%;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--fs-base);
  font-weight: 400;
  color: var(--ink);
  background: var(--paper);
  line-height: var(--lh-body);
  letter-spacing: var(--tracking-cn);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4,
.hero-brand,
.hero-title {
  font-family: var(--font-display);
  text-wrap: balance;
  text-rendering: optimizeLegibility;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: 0; background: none; }
ul, ol { margin: 0; padding: 0; list-style: none; }

.container {
  width: min(100% - 2.5rem, var(--max));
  margin-inline: auto;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--blue);
  color: #fff;
  padding: 0.75rem 1rem;
  z-index: 1000;
}
.skip-link:focus { left: 1rem; top: 1rem; }

/* Nav */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-h);
  backdrop-filter: blur(14px);
  background: rgba(255, 255, 255, 0.9);
  border-bottom: 1px solid transparent;
  transition: border-color 0.25s, box-shadow 0.25s;
}
.site-header.is-scrolled {
  border-bottom-color: var(--line);
  box-shadow: 0 8px 24px rgba(37, 99, 235, 0.06);
}

.nav {
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  flex-shrink: 0;
}
.brand-lockup {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
  min-width: 0;
}
.nav-wecom {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  line-height: 0;
  flex-shrink: 0;
  border-radius: 6px;
  overflow: hidden;
  transition: opacity 0.2s, transform 0.2s;
}
.nav-wecom:hover { opacity: 0.92; transform: translateY(-1px); }
.nav-wecom img {
  display: block;
  height: 28px;
  width: auto;
}
.logo-img {
  width: 40px;
  height: 40px;
  border-radius: 0;
  border: 0;
  box-shadow: none;
  object-fit: contain;
  background: transparent;
}
.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}
.logo-text strong {
  font-family: var(--font-display);
  font-size: 1.08rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}
.logo-text span {
  font-size: var(--fs-xs);
  color: var(--muted);
  letter-spacing: 0.01em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.1rem;
  flex-wrap: wrap;
  justify-content: center;
}
.nav-links a {
  padding: 0.4rem 0.55rem;
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--slate);
  border-radius: 8px;
  letter-spacing: 0.01em;
  transition: color 0.2s, background 0.2s;
}
.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--blue);
  background: var(--sky);
}

.nav-cta {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.72rem 1.25rem;
  border-radius: 999px;
  font-family: var(--font-display);
  font-size: 0.94rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  transition: transform 0.2s, box-shadow 0.2s, background 0.2s, color 0.2s;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary {
  background: var(--blue);
  color: #fff;
  box-shadow: 0 10px 24px var(--blue-glow);
}
.btn-primary:hover { background: var(--blue-deep); }
.btn-ghost {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line);
}
.btn-ghost:hover {
  background: var(--sky);
  border-color: rgba(37, 99, 235, 0.35);
  color: var(--blue-deep);
}
.btn-accent {
  background: var(--navy);
  color: #fff;
  box-shadow: 0 10px 24px rgba(11, 31, 74, 0.2);
}
.btn-accent:hover { filter: brightness(1.08); }

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  border: 1px solid var(--line);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
}
.menu-toggle span {
  width: 18px;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
}

/* Hero */
.hero {
  position: relative;
  min-height: calc(100vh - var(--nav-h));
  display: flex;
  align-items: center;
  overflow: hidden;
  isolation: isolate;
  background: var(--white);
}
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(ellipse 70% 55% at 82% 28%, rgba(37, 99, 235, 0.16), transparent 60%),
    radial-gradient(ellipse 45% 40% at 8% 85%, rgba(59, 130, 246, 0.1), transparent 55%),
    linear-gradient(180deg, #ffffff 0%, #f0f7ff 55%, #e8f1fc 100%);
}
.hero-bg::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(37, 99, 235, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(37, 99, 235, 0.05) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 80% 70% at 50% 40%, #000 20%, transparent 75%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 0.92fr 1.18fr;
  gap: 5.25rem;
  align-items: center;
  padding: 2.75rem 0 3.75rem;
}

.hero-copy {
  max-width: 40rem;
  min-width: 0;
}

.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.45rem 1rem;
  border-radius: 999px;
  background: var(--sky);
  color: var(--blue-deep);
  font-family: var(--font-display);
  font-size: 0.92rem;
  font-weight: 600;
  margin: 0 0 1.15rem;
  border: 1px solid var(--sky-2);
  letter-spacing: 0.04em;
}
.hero-kicker::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--blue);
  box-shadow: 0 0 0 4px var(--blue-soft);
}

.hero-brand {
  font-family: var(--font-display);
  font-size: clamp(2.85rem, 5.8vw, 4.35rem);
  font-weight: 800;
  letter-spacing: 0.06em;
  line-height: var(--lh-tight);
  margin: 0 0 1rem;
  color: var(--ink);
}
.hero-brand em {
  font-style: normal;
  color: var(--blue);
}
.hero-title {
  font-size: clamp(1.4rem, 2.6vw, 1.9rem);
  font-weight: 700;
  color: var(--blue-deep);
  margin: 0 0 1.1rem;
  line-height: var(--lh-snug);
  max-width: 16em;
  letter-spacing: 0.03em;
}
.hero-desc {
  margin: 0 0 1.85rem;
  color: var(--slate);
  font-size: clamp(1.05rem, 1.4vw, 1.15rem);
  line-height: var(--lh-loose);
  letter-spacing: 0.02em;
  max-width: 34em;
  text-wrap: pretty;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
}
.hero-actions .btn {
  padding: 0.92rem 1.55rem;
  font-size: var(--fs-md);
}
.hero-trust {
  margin-top: 1.35rem;
  font-size: var(--fs-sm);
  line-height: var(--lh-snug);
  color: var(--muted);
  letter-spacing: 0.01em;
  white-space: nowrap;
}

.hero-visual {
  position: relative;
  width: 100%;
  min-height: 0;
}
.chat-stage {
  position: relative;
  width: 100%;
  min-height: 420px;
  border-radius: 24px;
  background: linear-gradient(160deg, #0b1f4a 0%, #1e3a8a 50%, #2563eb 100%);
  overflow: hidden;
  box-shadow: 0 24px 60px rgba(37, 99, 235, 0.28);
  animation: float-in 0.9s ease both;
}
.chat-stage::after {
  content: "";
  position: absolute;
  inset: auto -20% -30% 20%;
  height: 60%;
  background: radial-gradient(circle, rgba(147, 197, 253, 0.45), transparent 65%);
  pointer-events: none;
}
.chat-panel {
  position: absolute;
  inset: 1.25rem;
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 0.85rem;
}
.chat-side {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 14px;
  padding: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.account-pill {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.45rem 0.5rem;
  border-radius: 10px;
  color: rgba(255, 255, 255, 0.88);
  font-size: 0.72rem;
  background: rgba(255, 255, 255, 0.05);
  animation: rise 0.7s ease both;
}
.account-pill:nth-child(2) { animation-delay: 0.12s; }
.account-pill:nth-child(3) { animation-delay: 0.22s; }
.account-pill:nth-child(4) { animation-delay: 0.32s; }
.account-pill.is-active { background: rgba(59, 130, 246, 0.45); }
.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #93c5fd;
  flex-shrink: 0;
}
.dot.orange { background: #fbbf24; }
.dot.blue { background: #60a5fa; }
.chat-main {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 14px;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.bubble {
  max-width: 88%;
  padding: 0.7rem 0.85rem;
  border-radius: 12px;
  font-size: 0.78rem;
  line-height: 1.5;
  color: #e8f0ff;
  animation: rise 0.75s ease both;
}
.bubble.in { align-self: flex-start; background: rgba(255, 255, 255, 0.12); }
.bubble.out { align-self: flex-end; background: rgba(37, 99, 235, 0.75); animation-delay: 0.2s; }
.bubble.ai {
  align-self: flex-start;
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.45), rgba(14, 165, 233, 0.4));
  animation-delay: 0.4s;
  border: 1px solid rgba(255, 255, 255, 0.14);
}
.bubble small {
  display: block;
  opacity: 0.7;
  font-size: 0.68rem;
  margin-bottom: 0.2rem;
}
.stage-badge {
  position: absolute;
  right: 1.5rem;
  bottom: 1.5rem;
  z-index: 2;
  background: rgba(255, 255, 255, 0.96);
  color: var(--ink);
  padding: 0.55rem 0.85rem;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 600;
  box-shadow: var(--shadow);
  animation: pulse-soft 2.8s ease-in-out infinite;
}

/* Sections */
section { padding: 5rem 0; }
.section-head {
  max-width: 42rem;
  margin-bottom: 2.5rem;
}
.section-head.center {
  text-align: center;
  margin-inline: auto;
}
.eyebrow {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: var(--tracking-label);
  color: var(--blue);
  margin-bottom: 0.65rem;
}
h2 {
  font-family: var(--font-display);
  font-size: clamp(1.65rem, 3vw, 2.25rem);
  font-weight: 700;
  letter-spacing: 0.03em;
  line-height: var(--lh-tight);
  margin: 0 0 0.75rem;
}
h3 {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: var(--lh-snug);
}
.section-head p,
.lede {
  margin: 0;
  color: var(--slate);
  font-size: var(--fs-md);
  line-height: var(--lh-loose);
  letter-spacing: 0.02em;
  text-wrap: pretty;
}
#features .section-head {
  max-width: min(100%, 58rem);
}
#features .section-head p {
  white-space: nowrap;
}
#ai .section-head {
  max-width: min(100%, 58rem);
}
#ai .section-head p {
  white-space: nowrap;
}
#demo .section-head {
  max-width: min(100%, 58rem);
}
#demo .section-head p {
  white-space: nowrap;
}

.features { background: var(--white); }
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.15rem;
}
.feature {
  padding: 1.45rem 1.3rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, var(--sky) 0%, var(--white) 42%);
  transition: transform 0.25s, box-shadow 0.25s, border-color 0.25s;
}
.feature:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
  border-color: rgba(37, 99, 235, 0.28);
}
.feature-icon {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: var(--blue-soft);
  color: var(--blue-deep);
  display: grid;
  place-items: center;
  margin-bottom: 1rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.9rem;
}
.feature h3 {
  margin: 0 0 0.5rem;
  font-size: 1.1rem;
  font-weight: 700;
}
.feature p {
  margin: 0;
  color: var(--slate);
  font-size: 0.95rem;
  line-height: var(--lh-body);
}
.feature ul {
  margin-top: 0.75rem;
  display: grid;
  gap: 0.3rem;
}
.feature li {
  font-size: var(--fs-sm);
  color: var(--slate);
  line-height: var(--lh-snug);
  padding-left: 0.9rem;
  position: relative;
}
.feature li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--blue);
}

/* AI trio */
.ai-core {
  background:
    radial-gradient(ellipse 50% 60% at 0% 0%, rgba(37, 99, 235, 0.08), transparent),
    var(--paper);
}
.ai-trio {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.15rem;
}
.ai-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 1.5rem 1.35rem;
  box-shadow: 0 8px 30px rgba(37, 99, 235, 0.04);
}
.ai-card h3 {
  margin: 0 0 0.55rem;
  font-size: 1.18rem;
  color: var(--blue-deep);
  letter-spacing: 0.02em;
}
.ai-card p {
  margin: 0 0 0.9rem;
  color: var(--slate);
  font-size: 0.95rem;
  line-height: var(--lh-body);
}
.ai-card ul { display: grid; gap: 0.35rem; }
.ai-card li {
  font-size: 0.88rem;
  color: var(--ink-soft);
  padding-left: 1rem;
  position: relative;
}
.ai-card li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--blue);
  font-weight: 700;
  font-size: 0.8rem;
}

/* Industry */
.industry { background: var(--white); }
.industry-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.9rem;
}
.industry-item {
  padding: 1.1rem 1rem;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: var(--paper);
  transition: border-color 0.2s, transform 0.2s, background 0.2s;
}
.industry-item:hover {
  border-color: rgba(37, 99, 235, 0.35);
  background: var(--sky);
  transform: translateY(-2px);
}
.industry-item h3 {
  margin: 0 0 0.35rem;
  font-size: 0.98rem;
}
.industry-item p {
  margin: 0;
  font-size: 0.84rem;
  color: var(--muted);
}

/* AI capabilities */
.ai-caps {
  background:
    radial-gradient(ellipse 60% 50% at 100% 0%, rgba(37, 99, 235, 0.1), transparent),
    var(--paper);
}
.cap-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}
.cap-item {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 1.25rem 1.1rem;
}
.cap-item .num {
  font-family: var(--font-display);
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--blue);
  margin-bottom: 0.55rem;
}
.cap-item h3 {
  margin: 0 0 0.4rem;
  font-size: 1rem;
}
.cap-item p {
  margin: 0;
  font-size: 0.88rem;
  color: var(--slate);
}

/* Marketing / Ops */
.marketing { background: var(--white); }
.ops {
  background:
    radial-gradient(ellipse 50% 60% at 0% 100%, rgba(37, 99, 235, 0.08), transparent),
    var(--paper);
}
.module-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}
.module {
  border-top: 3px solid var(--blue);
  padding: 1.25rem 0.15rem 0.5rem;
}
.module h3 {
  margin: 0 0 0.45rem;
  font-size: 1.05rem;
}
.module p {
  margin: 0;
  color: var(--slate);
  font-size: 0.92rem;
}

/* Selling */
.sell { position: relative; overflow: hidden; background: var(--white); }
.sell-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  align-items: start;
}
.sell-list {
  display: flex;
  flex-direction: column;
  gap: 1.15rem;
}
.sell-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  padding-bottom: 1.15rem;
  border-bottom: 1px solid var(--line);
}
.sell-item:last-child { border-bottom: 0; padding-bottom: 0; }
.sell-num {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--blue);
  line-height: 1;
  padding-top: 0.15rem;
}
.sell-item h3 { margin: 0 0 0.35rem; font-size: 1.08rem; }
.sell-item p { margin: 0; color: var(--slate); font-size: 0.95rem; line-height: var(--lh-body); }

.stat-panel {
  background: linear-gradient(145deg, var(--navy), #1e3a8a 60%, #2563eb);
  color: #fff;
  border-radius: 22px;
  padding: 2rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  box-shadow: var(--shadow);
}
.stat strong {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 700;
  letter-spacing: 0.02em;
  color: #93c5fd;
  margin-bottom: 0.25rem;
}
.stat span {
  font-size: var(--fs-sm);
  line-height: var(--lh-snug);
  color: rgba(255, 255, 255, 0.75);
}

/* Pricing */
.pricing { background: var(--paper); }
.price-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}
.price-card {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.5rem 1.25rem;
  background: var(--white);
  display: flex;
  flex-direction: column;
  transition: border-color 0.2s, transform 0.2s, box-shadow 0.2s;
}
.price-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow);
}
.price-card.featured {
  background: linear-gradient(165deg, #0b1f4a, #1d4ed8);
  color: #fff;
  border-color: transparent;
}
.price-card.featured .price-desc,
.price-card.featured .price-list li { color: rgba(255, 255, 255, 0.75); }
.price-card.featured .price-amount { color: #93c5fd; }
.badge-hot {
  position: absolute;
  top: 0.9rem;
  right: 0.9rem;
  background: #f59e0b;
  color: #fff;
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
}
.price-name { margin: 0 0 0.35rem; font-size: 1.05rem; font-weight: 700; }
.price-desc {
  margin: 0 0 1rem;
  font-size: 0.88rem;
  color: var(--slate);
  min-height: 2.8em;
}
.price-amount {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  margin-bottom: 0.15rem;
  color: var(--blue-deep);
}
.price-amount small {
  font-size: 0.85rem;
  font-weight: 500;
  opacity: 0.7;
}
.price-list {
  margin: 1.15rem 0 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}
.price-list li {
  font-size: 0.88rem;
  color: var(--slate);
  padding-left: 1.15rem;
  position: relative;
}
.price-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--blue);
}
.price-card.featured .price-list li::before { background: #93c5fd; }
.price-card .btn { width: 100%; }
.price-note {
  margin-top: 1.5rem;
  text-align: center;
  color: var(--muted);
  font-size: 0.9rem;
}
.price-note a { color: var(--blue-deep); }

/* API */
.api { background: var(--white); }
.api-layout {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 2rem;
  align-items: center;
}
.api-points {
  display: grid;
  gap: 1rem;
  margin-top: 1.5rem;
}
.api-point h3 { margin: 0 0 0.3rem; font-size: 1rem; }
.api-point p { margin: 0; color: var(--slate); font-size: 0.92rem; }
.code-block {
  background: #0b1f4a;
  color: #d7e6ef;
  border-radius: 18px;
  padding: 1.35rem 1.4rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.65;
  overflow-x: auto;
  box-shadow: var(--shadow);
  border: 1px solid rgba(255, 255, 255, 0.06);
}
.code-block .cm { color: #7c93b5; }
.code-block .kw { color: #93c5fd; }
.code-block .str { color: #fcd34d; }
.code-block .num { color: #86efac; }
.api-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.25rem;
}
.api-tags span {
  font-size: 0.78rem;
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  background: var(--sky);
  color: var(--blue-deep);
  font-weight: 600;
  border: 1px solid var(--sky-2);
}
.api-doc-band {
  background:
    radial-gradient(ellipse 50% 60% at 100% 0%, rgba(37, 99, 235, 0.08), transparent),
    var(--paper);
}
.api-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  counter-reset: api-step;
}
.api-steps li {
  position: relative;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 1.35rem 1.2rem 1.2rem;
  counter-increment: api-step;
}
.api-steps li::before {
  content: counter(api-step, decimal-leading-zero);
  display: inline-block;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--blue-deep);
  background: var(--blue-soft);
  border-radius: 999px;
  padding: 0.2rem 0.55rem;
  margin-bottom: 0.75rem;
}
.api-steps strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.02rem;
  margin-bottom: 0.4rem;
  letter-spacing: 0.02em;
}
.api-steps p {
  margin: 0;
  color: var(--slate);
  font-size: 0.9rem;
  line-height: var(--lh-body);
}
.api-checklist {
  margin: 1.25rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.55rem;
}
.api-checklist li {
  position: relative;
  padding-left: 1.25rem;
  color: var(--ink-soft);
  font-size: 0.95rem;
  line-height: var(--lh-snug);
}
.api-checklist li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--blue);
  font-weight: 700;
}
.api-catalog {
  display: grid;
  gap: 0.75rem;
}
.api-cat {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--white);
  overflow: hidden;
}
.api-cat summary {
  padding: 1rem 1.15rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.02rem;
  letter-spacing: 0.02em;
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.api-cat summary::-webkit-details-marker { display: none; }
.api-cat summary::after {
  content: "+";
  color: var(--blue);
  font-weight: 700;
  flex-shrink: 0;
}
.api-cat[open] summary::after { content: "–"; }
.api-cat[open] summary {
  border-bottom: 1px solid var(--line);
  background: var(--sky);
}
.api-chip-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  padding: 1rem 1.15rem 1.15rem;
}
.api-chip-list span {
  display: inline-block;
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  background: var(--paper);
  border: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: 0.82rem;
  line-height: 1.4;
}

/* Best practices */
.practice-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}
.practice-card {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--white);
  overflow: hidden;
  transition: transform 0.25s, box-shadow 0.25s, border-color 0.25s;
  color: inherit;
  text-decoration: none;
}
.practice-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
  border-color: rgba(37, 99, 235, 0.28);
}
.practice-card figure {
  margin: 0;
  aspect-ratio: 16 / 10;
  background: var(--sky);
  overflow: hidden;
}
.practice-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.practice-card .body {
  padding: 1.25rem 1.2rem 1.4rem;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  flex: 1;
}
.practice-card .tag {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--blue-deep);
  letter-spacing: 0.04em;
}
.practice-card h3 {
  margin: 0;
  font-size: 1.12rem;
  line-height: 1.4;
  letter-spacing: 0.02em;
}
.practice-card p {
  margin: 0;
  color: var(--slate);
  font-size: 0.92rem;
  line-height: var(--lh-body);
  flex: 1;
}
.practice-card .more {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--blue);
}
.practice-article {
  max-width: 820px;
  margin: 0 auto;
  padding: 0 0 4rem;
}
.practice-back {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin: 0 0 0.85rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--blue-deep);
  letter-spacing: 0.02em;
  transition: color 0.2s, opacity 0.2s;
}
.practice-back:hover { color: var(--blue); opacity: 0.9; }
.practice-back::before {
  content: "←";
  font-weight: 700;
}
.practice-article .meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  color: var(--muted);
  font-size: 0.88rem;
  margin: 0 0 1.5rem;
}
.practice-cover {
  margin: 0 0 2rem;
  border-radius: 18px;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--sky);
}
.practice-cover img {
  width: 100%;
  display: block;
}
.practice-body h2 {
  margin: 2.25rem 0 0.85rem;
  font-size: clamp(1.25rem, 2.4vw, 1.55rem);
}
.practice-body h3 {
  margin: 1.5rem 0 0.55rem;
  font-size: 1.08rem;
  color: var(--blue-deep);
}
.practice-body p,
.practice-body li {
  color: var(--ink-soft);
  line-height: var(--lh-loose);
  font-size: 1.02rem;
}
.practice-body p { margin: 0 0 1rem; }
.practice-body ul,
.practice-body ol {
  margin: 0 0 1.15rem;
  padding-left: 1.25rem;
  list-style: disc;
}
.practice-body ol { list-style: decimal; }
.practice-body li { margin-bottom: 0.4rem; }
.practice-body .code-block {
  margin: 0 0 1.25rem;
  font-size: 0.86rem;
}
.practice-body figure {
  margin: 1.25rem 0 1.5rem;
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--line);
}
.practice-body figcaption {
  padding: 0.65rem 0.85rem;
  font-size: 0.84rem;
  color: var(--muted);
  background: var(--paper);
}
.practice-nav {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
}
.practice-nav a {
  color: var(--blue-deep);
  font-weight: 600;
}

/* Contact / FAQ / CTA */
.contact { background: var(--paper); }
.contact-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 2rem;
}
.contact-card {
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 1.75rem;
  background: linear-gradient(160deg, #ffffff, #eff6ff);
}
.contact-card h3,
.contact-card h2 { margin: 0 0 0.5rem; }
.contact-card > p {
  margin: 0 0 1.25rem;
  color: var(--slate);
}
.contact-rows { display: grid; gap: 0.85rem; }
.contact-row {
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: 0.5rem;
  font-size: 0.95rem;
}
.contact-row dt { color: var(--muted); }
.contact-row dd { margin: 0; font-weight: 600; }
.qr-box {
  position: relative;
  border: 1px solid rgba(37, 99, 235, 0.18);
  border-radius: 20px;
  padding: 1.6rem 1.35rem 1.45rem;
  text-align: center;
  background:
    radial-gradient(ellipse 80% 55% at 50% 0%, rgba(191, 219, 254, 0.55), transparent 70%),
    linear-gradient(180deg, #f8fbff 0%, #ffffff 48%, #eff6ff 100%);
  box-shadow: 0 14px 36px rgba(37, 99, 235, 0.08);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  overflow: hidden;
}
.qr-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.28rem 0.7rem;
  border-radius: 999px;
  background: rgba(37, 99, 235, 0.1);
  color: var(--blue-deep);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}
.qr-badge::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #22c55e;
  box-shadow: 0 0 0 3px rgba(34, 197, 94, 0.2);
}
.qr-frame {
  padding: 0.7rem;
  border-radius: 18px;
  background: #fff;
  border: 1px solid rgba(37, 99, 235, 0.12);
  box-shadow: 0 10px 28px rgba(15, 23, 42, 0.06);
}
.qr-img {
  width: 220px;
  height: 220px;
  max-width: min(220px, 56vw);
  aspect-ratio: 1;
  border-radius: 10px;
  object-fit: contain;
  background: #fff;
  display: block;
  image-rendering: -webkit-optimize-contrast;
}
.qr-meta {
  display: grid;
  gap: 0.45rem;
  width: 100%;
  max-width: 18rem;
}
.qr-title {
  font-size: 1.05rem;
  color: var(--ink);
  letter-spacing: 0.02em;
}
.qr-id {
  margin: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.4rem;
  font-size: 0.9rem;
  color: var(--muted);
}
.qr-id code {
  padding: 0.15rem 0.45rem;
  border-radius: 8px;
  background: rgba(37, 99, 235, 0.08);
  color: var(--blue-deep);
  font-weight: 700;
  font-size: 0.92rem;
  letter-spacing: 0.02em;
}
.qr-tip {
  margin: 0;
  font-size: 0.86rem;
  line-height: 1.5;
  color: var(--slate);
  padding: 0.55rem 0.75rem;
  border-radius: 10px;
  background: rgba(37, 99, 235, 0.06);
}
.copy-btn {
  margin-left: 0.45rem;
  padding: 0.15rem 0.55rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--white);
  color: var(--blue-deep);
  font-size: 0.75rem;
  font-weight: 600;
}
.copy-btn:hover { border-color: rgba(37, 99, 235, 0.4); }

.cta-band { padding: 4rem 0; background: var(--white); }
.cta-inner {
  border-radius: 24px;
  padding: 2.75rem 2rem;
  text-align: center;
  background:
    radial-gradient(ellipse 60% 80% at 50% 0%, rgba(147, 197, 253, 0.25), transparent 55%),
    linear-gradient(135deg, #0b1f4a, #1d4ed8);
  color: #fff;
}
.cta-inner h2 {
  color: #fff;
  max-width: 18ch;
  margin-inline: auto;
}
.cta-inner--api {
  padding: 3.25rem 2rem;
}
.cta-inner--api h2 {
  max-width: 16em;
  letter-spacing: 0.04em;
  margin-bottom: 0.85rem;
}
.cta-inner--api p {
  max-width: 36em;
}
.cta-kicker {
  display: inline-block;
  margin: 0 0 0.85rem !important;
  padding: 0.35rem 0.85rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: rgba(255, 255, 255, 0.92) !important;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.06em;
}
.cta-inner p {
  color: rgba(255, 255, 255, 0.78);
  margin: 0 auto 1.5rem;
  max-width: 38ch;
}
.cta-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.faq { background: var(--paper); }
.faq-list {
  max-width: 760px;
  margin: 0 auto;
  display: grid;
  gap: 0.75rem;
}
.faq-item {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--white);
  overflow: hidden;
}
.faq-item summary {
  padding: 1rem 1.15rem;
  font-family: var(--font-display);
  font-size: var(--fs-md);
  font-weight: 600;
  letter-spacing: 0.02em;
  line-height: var(--lh-snug);
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  color: var(--blue);
  font-family: var(--font-display);
  font-weight: 700;
}
.faq-item[open] summary::after { content: "–"; }
.faq-item p {
  margin: 0;
  padding: 0 1.15rem 1.1rem;
  color: var(--slate);
  font-size: 0.95rem;
  line-height: var(--lh-body);
}

/* Footer */
.site-footer {
  background: var(--navy);
  color: rgba(255, 255, 255, 0.78);
  padding: 3.5rem 0 2rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.35fr 0.95fr 0.9fr 0.95fr;
  gap: 2rem;
  margin-bottom: 2rem;
}
.footer-brand strong {
  display: block;
  color: #fff;
  font-family: var(--font-display);
  font-size: 1.2rem;
  letter-spacing: 0.06em;
  margin-bottom: 0.5rem;
}
.footer-brand p {
  margin: 0;
  font-size: 0.92rem;
  line-height: var(--lh-body);
  max-width: 28ch;
}
.footer-wecom {
  display: inline-block;
  margin-top: 1rem;
  line-height: 0;
  opacity: 0.95;
  transition: opacity 0.2s;
}
.footer-wecom:hover { opacity: 1; }
.footer-wecom img {
  display: block;
  height: 36px;
  width: auto;
}
.footer-col h4 {
  margin: 0 0 0.85rem;
  color: #fff;
  font-size: 0.92rem;
}
.footer-col a {
  display: block;
  font-size: 0.88rem;
  margin-bottom: 0.45rem;
  color: rgba(255, 255, 255, 0.65);
  transition: color 0.2s;
}
.footer-col a:hover { color: #93c5fd; }
.footer-partners {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem 1rem;
  padding: 1rem 0 1.35rem;
  margin-bottom: 0.25rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}
.footer-partners-label {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: rgba(255, 255, 255, 0.45);
  text-transform: none;
  white-space: nowrap;
}
.footer-partners ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.footer-partners li {
  padding: 0.32rem 0.75rem;
  border-radius: 999px;
  border: 1px solid rgba(147, 197, 253, 0.28);
  background: rgba(37, 99, 235, 0.16);
  color: rgba(226, 232, 240, 0.92);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 1.25rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.75rem;
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.5);
}

/* Demo showcase */
.demo {
  background:
    radial-gradient(ellipse 55% 50% at 100% 0%, rgba(37, 99, 235, 0.1), transparent),
    var(--paper);
}
.demo-shell {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 22px;
  box-shadow: var(--shadow);
  overflow: hidden;
}
.demo-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  padding: 1rem 1rem 0.85rem;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, var(--sky), #fff);
}
.demo-tab {
  padding: 0.55rem 0.95rem;
  border-radius: 999px;
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--slate);
  border: 1px solid transparent;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
}
.demo-tab:hover {
  color: var(--blue-deep);
  background: rgba(37, 99, 235, 0.06);
}
.demo-tab.is-active {
  color: #fff;
  background: var(--blue);
  border-color: var(--blue);
  box-shadow: 0 8px 18px var(--blue-glow);
}
.demo-panel {
  display: none;
  grid-template-columns: 0.9fr 1.2fr;
  gap: 1.5rem;
  padding: 1.5rem;
  align-items: center;
}
.demo-panel.is-active { display: grid; }
.demo-copy h3 {
  margin: 0 0 0.55rem;
  font-size: 1.28rem;
  letter-spacing: 0.02em;
}
.demo-copy p {
  margin: 0 0 1rem;
  color: var(--slate);
  font-size: 0.96rem;
  line-height: var(--lh-body);
}
.demo-copy ul {
  display: grid;
  gap: 0.4rem;
  margin-bottom: 1.1rem;
}
.demo-copy li {
  position: relative;
  padding-left: 1.1rem;
  font-size: 0.9rem;
  color: var(--ink-soft);
}
.demo-copy li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--blue);
}
.demo-frame {
  border-radius: 14px;
  border: 1px solid var(--line);
  background: #e8eef7;
  overflow: hidden;
  box-shadow: 0 16px 40px rgba(15, 23, 42, 0.1);
}
.demo-frame-bar {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.55rem 0.75rem;
  background: #f1f5f9;
  border-bottom: 1px solid var(--line);
}
.demo-frame-bar i {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #cbd5e1;
  display: block;
}
.demo-frame-bar i:nth-child(1) { background: #f87171; }
.demo-frame-bar i:nth-child(2) { background: #fbbf24; }
.demo-frame-bar i:nth-child(3) { background: #34d399; }
.demo-frame-bar span {
  margin-left: 0.45rem;
  font-size: 0.72rem;
  color: var(--muted);
}
.demo-frame img {
  width: 100%;
  height: auto;
  display: block;
  max-height: none;
  object-fit: contain;
  object-position: top center;
  background: #fff;
  image-rendering: -webkit-optimize-contrast;
  image-rendering: high-quality;
}

.shot-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-top: 2rem;
}
.shot-card {
  border: 1px solid var(--line);
  border-radius: 16px;
  overflow: hidden;
  background: var(--white);
  transition: transform 0.2s, box-shadow 0.2s;
}
.shot-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow);
}
.shot-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  object-position: top left;
  border-bottom: 1px solid var(--line);
  background: #f8fafc;
  image-rendering: -webkit-optimize-contrast;
  image-rendering: high-quality;
}
.shot-card figcaption {
  padding: 0.85rem 1rem 1rem;
}
.shot-card strong {
  display: block;
  font-size: 0.95rem;
  margin-bottom: 0.25rem;
}
.shot-card span {
  font-size: 0.84rem;
  color: var(--muted);
}

.hero-visual {
  position: relative;
  width: 100%;
  min-height: 0;
}
.hero-shot {
  border-radius: 22px;
  overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: 0 28px 70px rgba(37, 99, 235, 0.3);
  background: #fff;
  animation: float-in 0.9s ease both;
  width: 100%;
}
.hero-shot picture {
  display: block;
  width: 100%;
}
.hero-shot img {
  width: 100%;
  height: auto;
  max-height: none;
  min-height: 0;
  object-fit: contain;
  object-position: top center;
  display: block;
  background: #f8fafc;
  image-rendering: -webkit-optimize-contrast;
}

@media (max-width: 980px) {
  .demo-panel.is-active { grid-template-columns: 1fr; }
  .shot-row { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 760px) {
  .shot-row { grid-template-columns: 1fr; }
  .demo-tabs { flex-wrap: nowrap; overflow-x: auto; -webkit-overflow-scrolling: touch; }
  .demo-tab { white-space: nowrap; }
}

.page-hero {
  padding: 3.5rem 0 2rem;
  background:
    radial-gradient(ellipse 50% 80% at 90% 0%, rgba(37, 99, 235, 0.12), transparent),
    var(--paper);
}
.page-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(1.85rem, 3.4vw, 2.7rem);
  letter-spacing: 0.04em;
  margin: 0 0 0.75rem;
  line-height: var(--lh-tight);
}
.page-hero p {
  margin: 0;
  color: var(--slate);
  max-width: 42ch;
  font-size: var(--fs-md);
  line-height: var(--lh-loose);
  letter-spacing: 0.02em;
}
.api-table-wrap {
  overflow-x: auto;
  margin: 1.5rem 0 2rem;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--white);
}
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
}
th, td {
  text-align: left;
  padding: 0.9rem 1rem;
  border-bottom: 1px solid var(--line);
}
th {
  background: var(--sky);
  font-weight: 600;
}
tr:last-child td { border-bottom: 0; }
code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  background: var(--sky);
  padding: 0.1em 0.35em;
  border-radius: 4px;
  color: var(--blue-deep);
}

@keyframes float-in {
  from { opacity: 0; transform: translateY(18px) scale(0.98); }
  to { opacity: 1; transform: none; }
}
@keyframes rise {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: none; }
}
@keyframes pulse-soft {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-4px); }
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.is-visible {
  opacity: 1;
  transform: none;
}

@media (max-width: 1100px) {
  .industry-grid,
  .cap-grid,
  .practice-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 980px) {
  .hero-grid,
  .sell-layout,
  .api-layout,
  .contact-grid,
  .ai-trio { grid-template-columns: 1fr; }
  .api-steps { grid-template-columns: 1fr 1fr; }
  .feature-grid,
  .module-grid { grid-template-columns: 1fr 1fr; }
  .price-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .hero-visual,
  .chat-stage { min-height: 0; }
  .hero-shot img {
    min-height: 0;
    max-height: none;
  }
  #features .section-head p,
  #ai .section-head p,
  #demo .section-head p {
    white-space: normal;
  }
}

@media (max-width: 760px) {
  .nav-links,
  .nav-cta .btn-ghost { display: none; }
  .menu-toggle { display: inline-flex; }
  .nav-wecom img { height: 24px; }
  .logo-text span { display: none; }
  .nav.is-open .nav-links {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: var(--nav-h);
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    border-bottom: 1px solid var(--line);
    padding: 0.75rem 1.25rem 1rem;
    gap: 0.15rem;
    box-shadow: var(--shadow);
  }
  .nav.is-open .nav-links a { padding: 0.75rem 0.5rem; }
  .feature-grid,
  .price-grid,
  .footer-grid,
  .stat-panel,
  .module-grid,
  .industry-grid,
  .cap-grid,
  .api-steps,
  .practice-grid { grid-template-columns: 1fr; }
  .chat-panel { grid-template-columns: 1fr; }
  .chat-side { flex-direction: row; flex-wrap: wrap; }
  .hero-grid { padding-top: 2rem; }
  .hero-brand { font-size: clamp(2.5rem, 10.5vw, 3.2rem); letter-spacing: 0.05em; }
  .hero-title { font-size: clamp(1.25rem, 5vw, 1.5rem); max-width: none; }
  .hero-desc { font-size: 1.02rem; }
  .hero-actions .btn { width: 100%; }
  .hero-trust {
    white-space: normal;
    font-size: 0.88rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
  }
  html { scroll-behavior: auto; }
}