/* ===== Design tokens (ZTRFM brand) ===== */
:root {
  --zt-primary-light: #00a0ff;
  --zt-primary: #1a7fe8;
  --zt-primary-dark: #0050c8;
  --zt-gradient: linear-gradient(135deg, #00a0ff 0%, #0050c8 100%);
  --zt-gradient-banner: linear-gradient(135deg, #003d82 0%, #0050c8 45%, #1a7fe8 100%);
  --zt-bg-page: #f4f7fb;
  --zt-bg-card: #ffffff;
  --zt-text-primary: #1d2129;
  --zt-text-secondary: #4e5969;
  --zt-text-muted: #86909c;
  --zt-border: #e5e8ef;
  --zt-shadow: 0 4px 24px rgba(0, 80, 200, 0.08);
  --zt-shadow-lg: 0 20px 60px rgba(0, 50, 150, 0.18);
  --nav-height: 72px;
  --container: 1120px;
  --radius: 12px;
  --radius-lg: 16px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--zt-text-primary);
  line-height: 1.6;
  background: var(--zt-bg-page);
  -webkit-font-smoothing: antialiased;
}

a { color: var(--zt-primary); text-decoration: none; }

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

.container {
  width: min(100% - 48px, var(--container));
  margin-inline: auto;
}

/* ===== Header ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-height);
  transition: background 0.3s, box-shadow 0.3s, backdrop-filter 0.3s;
}

.site-header.scrolled {
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 var(--zt-border);
}

.site-header.scrolled .brand-name { color: var(--zt-text-primary); }
.site-header.scrolled .nav-menu > a:not(.nav-cta):not(.nav-login) { color: var(--zt-text-secondary); }
.site-header.scrolled .nav-login { color: var(--zt-primary); border-color: var(--zt-primary); }
.site-header.scrolled .nav-toggle span { background: var(--zt-text-primary); }

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

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

.brand-logo {
  width: 36px;
  height: 36px;
  border-radius: 8px;
}

.brand-name {
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.02em;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-menu > a:not(.nav-cta):not(.nav-login) {
  color: rgba(255, 255, 255, 0.88);
  font-size: 14px;
  font-weight: 500;
  transition: color 0.2s;
}

.nav-menu > a:not(.nav-cta):not(.nav-login):hover { color: #fff; }

.nav-login {
  padding: 8px 18px;
  border: 1.5px solid rgba(255, 255, 255, 0.6);
  border-radius: 8px;
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  transition: background 0.2s, border-color 0.2s;
}

.nav-login:hover { background: rgba(255, 255, 255, 0.12); }

.nav-cta {
  padding: 8px 20px;
  background: #fff;
  color: var(--zt-primary);
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  transition: transform 0.2s, box-shadow 0.2s;
}

.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}

/* ===== Banner ===== */
.banner {
  position: relative;
  min-height: 100vh;
  padding-top: var(--nav-height);
  background: var(--zt-gradient-banner);
  color: #fff;
  overflow: hidden;
}

.banner-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.35;
}

.orb-1 {
  width: 500px;
  height: 500px;
  background: #00a0ff;
  top: -100px;
  right: -80px;
  animation: float 8s ease-in-out infinite;
}

.orb-2 {
  width: 400px;
  height: 400px;
  background: #0050c8;
  bottom: 0;
  left: -100px;
  animation: float 10s ease-in-out infinite reverse;
}

.grid-lines {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 70% at 50% 50%, black, transparent);
}

@keyframes float {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(20px, -20px); }
}

.banner-inner {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  min-height: calc(100vh - var(--nav-height) - 80px);
  padding-block: 60px 100px;
}

.banner-badge {
  display: inline-block;
  padding: 6px 14px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 100px;
  font-size: 13px;
  letter-spacing: 0.04em;
  margin-bottom: 20px;
}

.banner-copy h1 {
  font-size: clamp(32px, 5vw, 48px);
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 20px;
}

.banner-copy h1 span {
  background: linear-gradient(90deg, #7ec8ff, #fff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.banner-desc {
  font-size: 17px;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.85);
  max-width: 520px;
  margin-bottom: 32px;
}

.banner-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  transition: transform 0.2s, box-shadow 0.2s, background 0.2s;
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: #fff;
  color: var(--zt-primary);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.btn-ghost {
  background: transparent;
  color: #fff;
  border: 2px solid rgba(255, 255, 255, 0.7);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: #fff;
}

.banner-stats {
  display: flex;
  gap: 32px;
  flex-wrap: wrap;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
}

.stat strong {
  display: block;
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 4px;
}

.stat span {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.7);
}

/* Banner visual mockup */
.banner-visual {
  position: relative;
  height: 420px;
}

.dashboard-card {
  background: rgba(255, 255, 255, 0.95);
  border-radius: var(--radius-lg);
  box-shadow: var(--zt-shadow-lg);
  color: var(--zt-text-primary);
}

.card-main {
  position: absolute;
  top: 20px;
  left: 0;
  right: 40px;
  padding: 0;
  animation: cardFloat 6s ease-in-out infinite;
}

@keyframes cardFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

.card-header {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--zt-border);
  font-size: 12px;
  color: var(--zt-text-muted);
}

.card-header .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #e5e8ef;
}

.card-header .dot:nth-child(1) { background: #ff5f57; }
.card-header .dot:nth-child(2) { background: #febc2e; }
.card-header .dot:nth-child(3) { background: #28c840; }

.card-body { padding: 20px 18px; }

.route {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
  font-weight: 600;
}

.route .port {
  padding: 6px 12px;
  background: var(--zt-bg-page);
  border-radius: 6px;
  font-size: 14px;
}

.route .arrow { color: var(--zt-primary); font-size: 18px; }

.quote-rows { display: flex; flex-direction: column; gap: 10px; }

.quote-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 14px;
  background: var(--zt-bg-page);
  border-radius: 8px;
  font-size: 14px;
}

.quote-row em {
  font-style: normal;
  font-weight: 700;
  color: var(--zt-primary);
}

.quote-row.highlight {
  background: linear-gradient(90deg, rgba(26, 127, 232, 0.1), rgba(0, 160, 255, 0.06));
  border: 1px solid rgba(26, 127, 232, 0.25);
}

.card-float {
  position: absolute;
  animation: cardFloat 5s ease-in-out infinite;
}

.card-badge {
  display: flex;
  align-items: center;
  gap: 10px;
  bottom: 60px;
  right: 0;
  padding: 14px 18px;
  animation-delay: -2s;
}

.card-badge svg {
  width: 32px;
  height: 32px;
  color: #00b42a;
  flex-shrink: 0;
}

.card-badge strong { display: block; font-size: 14px; }
.card-badge span { font-size: 12px; color: var(--zt-text-muted); }

.card-chart {
  display: flex;
  align-items: flex-end;
  gap: 6px;
  top: 0;
  right: 0;
  padding: 16px;
  animation-delay: -3s;
}

.card-chart .bar {
  width: 12px;
  height: calc(var(--h) * 0.6);
  background: var(--zt-gradient);
  border-radius: 4px 4px 0 0;
  min-height: 20px;
}

.stat-ai strong {
  background: linear-gradient(90deg, #7ec8ff, #c4b5fd);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.card-ai {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  top: 120px;
  left: -20px;
  max-width: 240px;
  padding: 14px 16px;
  background: linear-gradient(135deg, #1a1040 0%, #2d1b69 100%);
  color: #fff;
  border: 1px solid rgba(167, 139, 250, 0.35);
  animation-delay: -1.5s;
}

.card-ai .ai-spark {
  font-size: 18px;
  color: #a78bfa;
  flex-shrink: 0;
  animation: sparkle 2s ease-in-out infinite;
}

@keyframes sparkle {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(1.15); }
}

.card-ai strong { display: block; font-size: 13px; color: #c4b5fd; margin-bottom: 4px; }
.card-ai span { font-size: 11px; color: rgba(255, 255, 255, 0.75); line-height: 1.5; }

.banner-wave {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  line-height: 0;
}

.banner-wave svg { width: 100%; height: 80px; }

/* ===== Sections ===== */
.section { padding: 96px 0; }

.section-alt { background: #fff; }

.section-head {
  text-align: center;
  max-width: 600px;
  margin: 0 auto 56px;
}

.section-tag {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--zt-primary);
  margin-bottom: 12px;
}

.section-head h2 {
  font-size: clamp(26px, 4vw, 36px);
  font-weight: 700;
  margin-bottom: 14px;
}

.section-head p {
  color: var(--zt-text-secondary);
  font-size: 16px;
}

/* Feature tags */
.feature-tag {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 100px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.02em;
  margin-bottom: 14px;
}

.feature-tag.live {
  background: rgba(0, 180, 42, 0.1);
  color: #00b42a;
}

.feature-tag.ready {
  background: rgba(26, 127, 232, 0.12);
  color: var(--zt-primary);
}

.feature-tag.planned {
  background: rgba(134, 144, 156, 0.15);
  color: var(--zt-text-muted);
}

.feature-tag.soon {
  background: rgba(167, 139, 250, 0.15);
  color: #7c3aed;
}

/* Product features */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.feature-card {
  background: var(--zt-bg-card);
  border-radius: var(--radius-lg);
  padding: 24px 22px;
  border: 1px solid var(--zt-border);
  transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
}

.feature-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--zt-shadow);
  border-color: rgba(26, 127, 232, 0.2);
}

.feature-card h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
}

.feature-card p {
  font-size: 13px;
  color: var(--zt-text-secondary);
  line-height: 1.65;
}

/* AI section */
.section-ai {
  position: relative;
  background: linear-gradient(160deg, #0a1628 0%, #0f2847 40%, #1a1040 100%);
  color: #fff;
  overflow: hidden;
}

.ai-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.ai-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
}

.ai-orb-1 {
  width: 500px;
  height: 500px;
  background: rgba(0, 160, 255, 0.2);
  top: -150px;
  right: -100px;
}

.ai-orb-2 {
  width: 400px;
  height: 400px;
  background: rgba(124, 58, 237, 0.25);
  bottom: -100px;
  left: -80px;
}

.section-head-light { position: relative; }
.section-head-light .section-tag { color: #7ec8ff; }
.section-head-light h2 { color: #fff; }
.section-head-light p { color: rgba(255, 255, 255, 0.7); }

.ai-showcase {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
  margin-bottom: 48px;
  padding: 36px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(8px);
}

.ai-pill {
  display: inline-block;
  padding: 4px 12px;
  background: linear-gradient(90deg, rgba(124, 58, 237, 0.4), rgba(0, 160, 255, 0.3));
  border-radius: 100px;
  font-size: 12px;
  font-weight: 600;
  color: #c4b5fd;
  margin-bottom: 16px;
}

.ai-pill-ready {
  background: linear-gradient(90deg, rgba(26, 127, 232, 0.35), rgba(0, 160, 255, 0.25));
  color: #7ec8ff;
}

.ai-showcase-copy h3 {
  font-size: clamp(20px, 3vw, 26px);
  font-weight: 700;
  margin-bottom: 14px;
  line-height: 1.35;
}

.ai-showcase-copy > p {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.75);
  line-height: 1.75;
  margin-bottom: 20px;
}

.ai-points {
  list-style: none;
}

.ai-points li {
  position: relative;
  padding-left: 20px;
  margin-bottom: 8px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.8);
}

.ai-points li::before {
  content: "✦";
  position: absolute;
  left: 0;
  color: #a78bfa;
  font-size: 10px;
  top: 4px;
}

.ai-chat {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.ai-chat-bubble {
  padding: 14px 16px;
  border-radius: 12px;
  font-size: 13px;
  line-height: 1.6;
}

.ai-chat-bubble.user {
  background: rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.85);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.ai-chat-bubble.bot {
  background: linear-gradient(135deg, rgba(124, 58, 237, 0.25), rgba(26, 127, 232, 0.2));
  border: 1px solid rgba(167, 139, 250, 0.3);
  color: rgba(255, 255, 255, 0.9);
}

.ai-label {
  display: block;
  font-size: 11px;
  font-weight: 700;
  color: #c4b5fd;
  margin-bottom: 6px;
  letter-spacing: 0.05em;
}

.ai-grid {
  position: relative;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.ai-card {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  transition: transform 0.3s, border-color 0.3s, background 0.3s;
}

.ai-card:hover {
  transform: translateY(-4px);
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(167, 139, 250, 0.35);
}

.ai-card-icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(124, 58, 237, 0.3), rgba(0, 160, 255, 0.2));
  border-radius: 10px;
  margin-bottom: 16px;
  color: #c4b5fd;
}

.ai-card-icon svg { width: 22px; height: 22px; }

.ai-card h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 8px;
}

.ai-card p {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.65);
  line-height: 1.65;
}

.ai-card .feature-tag.ready {
  background: rgba(0, 160, 255, 0.2);
  color: #7ec8ff;
}

.ai-card .feature-tag.planned {
  background: rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.5);
}

/* Advantages */
.advantage-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.advantage-card {
  background: var(--zt-bg-card);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  box-shadow: var(--zt-shadow);
  border: 1px solid transparent;
  transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
}

.advantage-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 80, 200, 0.12);
  border-color: rgba(26, 127, 232, 0.15);
}

.advantage-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(0, 160, 255, 0.12), rgba(0, 80, 200, 0.08));
  border-radius: 12px;
  margin-bottom: 20px;
  color: var(--zt-primary);
}

.advantage-icon svg { width: 24px; height: 24px; }

.advantage-card h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 10px;
}

.advantage-card p {
  font-size: 14px;
  color: var(--zt-text-secondary);
  line-height: 1.7;
}

/* Flow */
.flow-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  position: relative;
}

.flow-steps::before {
  content: "";
  position: absolute;
  top: 36px;
  left: 12.5%;
  right: 12.5%;
  height: 2px;
  background: linear-gradient(90deg, var(--zt-primary-light), var(--zt-primary-dark));
  opacity: 0.2;
}

.flow-step {
  text-align: center;
  position: relative;
}

.flow-num {
  width: 72px;
  height: 72px;
  margin: 0 auto 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--zt-gradient);
  color: #fff;
  font-size: 22px;
  font-weight: 700;
  border-radius: 50%;
  box-shadow: 0 8px 24px rgba(26, 127, 232, 0.35);
  position: relative;
  z-index: 1;
}

.flow-step h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 8px;
}

.flow-step p {
  font-size: 14px;
  color: var(--zt-text-secondary);
  line-height: 1.6;
}

.flow-note {
  text-align: center;
  margin-top: 40px;
  padding: 16px 24px;
  background: var(--zt-bg-page);
  border-radius: var(--radius);
  font-size: 14px;
  color: var(--zt-text-muted);
}

/* About */
.about-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 64px;
  align-items: center;
}

.about-copy h2 {
  font-size: clamp(26px, 4vw, 34px);
  font-weight: 700;
  margin-bottom: 20px;
}

.about-copy p {
  color: var(--zt-text-secondary);
  margin-bottom: 16px;
  font-size: 15px;
  line-height: 1.8;
}

.about-highlights {
  list-style: none;
  margin: 24px 0 32px;
}

.about-highlights li {
  position: relative;
  padding-left: 22px;
  margin-bottom: 10px;
  font-size: 14px;
  color: var(--zt-text-secondary);
}

.about-highlights li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 8px;
  height: 8px;
  background: var(--zt-primary);
  border-radius: 50%;
}

.about-panel {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.about-metric {
  background: var(--zt-bg-card);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  box-shadow: var(--zt-shadow);
  border: 1px solid var(--zt-border);
  transition: transform 0.3s;
}

.about-metric:hover { transform: scale(1.02); }

.about-metric strong {
  display: block;
  font-size: 28px;
  font-weight: 700;
  background: var(--zt-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 6px;
}

.about-metric span {
  font-size: 13px;
  color: var(--zt-text-muted);
}

/* Links */
.link-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.link-card {
  display: flex;
  align-items: flex-start;
  gap: 18px;
  padding: 28px;
  background: var(--zt-bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--zt-border);
  color: inherit;
  transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
  position: relative;
}

.link-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--zt-shadow);
  border-color: rgba(26, 127, 232, 0.3);
}

.link-icon {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--zt-gradient);
  color: #fff;
  font-size: 18px;
  font-weight: 700;
  border-radius: 12px;
}

.link-card h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 6px;
}

.link-card p {
  font-size: 13px;
  color: var(--zt-text-secondary);
  line-height: 1.6;
  margin-bottom: 8px;
}

.link-url {
  font-size: 12px;
  color: var(--zt-primary);
  font-weight: 500;
}

.link-arrow {
  position: absolute;
  top: 28px;
  right: 28px;
  width: 18px;
  height: 18px;
  color: var(--zt-text-muted);
  transition: transform 0.2s, color 0.2s;
}

.link-card:hover .link-arrow {
  transform: translate(2px, -2px);
  color: var(--zt-primary);
}

/* Footer */
.site-footer {
  background: #0d1b2a;
  color: rgba(255, 255, 255, 0.7);
  padding: 64px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-logo {
  width: 44px;
  height: 44px;
  border-radius: 8px;
  margin-bottom: 12px;
}

.footer-name {
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 6px;
}

.footer-desc { font-size: 13px; }

.footer-col h4 {
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 16px;
}

.footer-col a {
  display: block;
  color: rgba(255, 255, 255, 0.6);
  font-size: 13px;
  margin-bottom: 10px;
  transition: color 0.2s;
}

.footer-col a:hover { color: #fff; }

.footer-bottom {
  padding: 24px 0;
  text-align: center;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.4);
}

/* Reveal animation */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .banner-inner { grid-template-columns: 1fr; }
  .banner-visual { display: none; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .ai-showcase { grid-template-columns: 1fr; }
  .ai-grid { grid-template-columns: repeat(2, 1fr); }
  .advantage-grid { grid-template-columns: repeat(2, 1fr); }
  .flow-steps { grid-template-columns: repeat(2, 1fr); }
  .flow-steps::before { display: none; }
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .nav-toggle { display: flex; }

  .nav-menu {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(12px);
    flex-direction: column;
    padding: 24px;
    gap: 16px;
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.3s, opacity 0.3s;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
  }

  .nav-menu.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav-menu > a:not(.nav-cta):not(.nav-login) { color: var(--zt-text-secondary); }
  .nav-login { color: var(--zt-primary); border-color: var(--zt-primary); text-align: center; width: 100%; }
  .nav-cta { text-align: center; width: 100%; }

  .site-header.scrolled .nav-menu { background: #fff; }

  .advantage-grid,
  .feature-grid,
  .ai-grid,
  .flow-steps,
  .link-grid,
  .about-panel { grid-template-columns: 1fr; }

  .ai-showcase { padding: 24px; }

  .section { padding: 64px 0; }
  .banner-stats { gap: 20px; }
  .footer-grid { grid-template-columns: 1fr; }
}