:root {
  --primary: #2b7fff;
  --primary-dark: #1a6ae6;
  --primary-light: #e8f1ff;
  --ink: #111827;
  --ink-soft: #1f2937;
  --text: #111827;
  --text-muted: #6b7280;
  --bg: #f8fafc;
  --bg-white: #ffffff;
  --sky-soft: #f0f6ff;
  --line: #e5e7eb;
  --line-strong: #d1d5db;
  --green: #22c55e;
  --green-dim: #dcfce7;
  --purple: #8b5cf6;
  --purple-dim: #ede9fe;
  --blue-soft: #e8f1ff;
  --amber-dim: #fef3c7;
  --radius: 14px;
  --radius-lg: 20px;
  --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Segoe UI", system-ui, sans-serif;
  --container: 1140px;
  --shadow-sm: 0 1px 3px rgba(43, 127, 255, 0.06);
  --shadow: 0 8px 30px rgba(43, 127, 255, 0.1);
  --shadow-hover: 0 16px 40px rgba(43, 127, 255, 0.15);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  color: var(--text);
  background: var(--bg-white);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  position: relative;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  background:
    radial-gradient(circle at 8% 14%, rgba(43, 127, 255, 0.14), transparent 38%),
    radial-gradient(circle at 92% 8%, rgba(139, 92, 246, 0.1), transparent 34%),
    radial-gradient(circle at 78% 88%, rgba(34, 197, 94, 0.08), transparent 36%),
    radial-gradient(circle at 14% 78%, rgba(43, 127, 255, 0.07), transparent 32%),
    linear-gradient(180deg, var(--sky-soft) 0%, #fafbff 38%, var(--bg-white) 72%);
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: 0.45;
  background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%232b7fff' fill-opacity='0.035'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

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

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

.container {
  width: min(var(--container), calc(100% - 40px));
  margin: 0 auto;
}

h1, h2, h3, h4 {
  font-family: inherit;
  font-weight: 700;
  letter-spacing: -0.02em;
  text-wrap: balance;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: 20px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 11px;
  font-weight: 700;
  font-size: 1.02rem;
  flex-shrink: 0;
}

.brand img {
  width: 40px;
  height: 40px;
  border-radius: 10px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav a {
  padding: 8px 14px;
  border-radius: 8px;
  color: var(--text-muted);
  font-size: 0.92rem;
  font-weight: 500;
  transition: color 0.2s, background 0.2s;
}

.nav a:hover { color: var(--primary); background: var(--primary-light); }

.nav a.active {
  color: var(--primary);
  font-weight: 600;
  background: var(--primary-light);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 999px;
  font-family: inherit;
  font-size: 0.92rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s, background 0.2s, border-color 0.2s;
}

.btn:hover { transform: translateY(-1px); }
.btn:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 4px 14px rgba(43, 127, 255, 0.35);
}

.btn-primary:hover {
  background: var(--primary-dark);
  box-shadow: 0 8px 22px rgba(43, 127, 255, 0.4);
}

.btn-outline {
  background: #fff;
  color: var(--text);
  border: 1px solid var(--line);
}

.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.btn-white {
  background: #fff;
  color: var(--primary);
  box-shadow: var(--shadow-sm);
}

.btn-sm { padding: 8px 16px; font-size: 0.86rem; }

.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.4rem;
  cursor: pointer;
  color: var(--text);
  padding: 4px 8px;
}

/* Hero */
.hero {
  padding: 72px 0 24px;
  background: transparent;
  border-bottom: none;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  width: 320px;
  height: 320px;
  top: -80px;
  right: -60px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(43, 127, 255, 0.12), transparent 68%);
  pointer-events: none;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 48px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-lead {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px 6px 10px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 18px;
}

.hero-lead .hero-tag-dot,
.hero-tag-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--primary);
  flex-shrink: 0;
}

.hero h1 {
  font-size: clamp(2rem, 4.2vw, 2.85rem);
  font-weight: 700;
  line-height: 1.22;
  color: var(--ink);
  margin-bottom: 22px;
}

.hero-desc {
  color: var(--text-muted);
  max-width: 480px;
  font-size: 1.05rem;
  margin-bottom: 32px;
}

.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }

.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 320px;
  position: relative;
}

.hero-blob {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
}

.hero-blob-a {
  width: 88px;
  height: 88px;
  top: 8%;
  left: 6%;
  background: rgba(43, 127, 255, 0.14);
}

.hero-blob-b {
  width: 56px;
  height: 56px;
  top: 18%;
  right: 8%;
  background: rgba(34, 197, 94, 0.18);
}

.hero-blob-c {
  width: 72px;
  height: 72px;
  bottom: 12%;
  right: 4%;
  background: rgba(139, 92, 246, 0.12);
}

.hero-panel {
  width: min(100%, 380px);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.95);
  border-radius: var(--radius-lg);
  padding: 22px;
  box-shadow: var(--shadow);
  position: relative;
  z-index: 1;
}

.hero-panel-bar {
  display: flex;
  gap: 6px;
  margin-bottom: 18px;
}

.hero-panel-bar span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--line-strong);
}

.hero-panel-bar span:first-child { background: #f07178; }
.hero-panel-bar span:nth-child(2) { background: #f0c14a; }
.hero-panel-bar span:nth-child(3) { background: #3dd68c; }

.hero-panel-line {
  height: 8px;
  background: var(--line);
  border-radius: 4px;
  margin-bottom: 10px;
  width: 88%;
}

.hero-panel-line.accent {
  width: 42%;
  background: linear-gradient(90deg, var(--primary), #60a5fa);
}

.hero-panel-line.short { width: 62%; }

.hero-panel-block {
  margin-top: 18px;
  height: 96px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--primary-light), #f8fafc);
  border: 1px solid var(--line);
}

.hero-panel-tag {
  position: absolute;
  bottom: 18px;
  right: 18px;
  font-family: ui-monospace, monospace;
  font-size: 0.72rem;
  color: var(--green);
  background: var(--green-dim);
  padding: 4px 10px;
  border-radius: 999px;
  font-weight: 600;
}

/* Proof band */
.section-proof {
  padding: 12px 0 56px;
  position: relative;
}

.proof-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  position: relative;
  z-index: 1;
}

.proof-card {
  text-align: center;
  padding: 26px 16px 22px;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(8px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: transform 0.22s ease, box-shadow 0.22s ease, border-color 0.22s ease;
}

.proof-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow);
  border-color: rgba(43, 127, 255, 0.25);
}

.proof-icon {
  width: 46px;
  height: 46px;
  margin: 0 auto 14px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
  font-weight: 600;
}

.proof-icon-blue { background: var(--blue-soft); color: var(--primary); }
.proof-icon-green { background: var(--green-dim); color: var(--green); }
.proof-icon-amber { background: var(--amber-dim); color: #d97706; }
.proof-icon-slate { background: var(--purple-dim); color: var(--purple); }

.proof-value {
  font-family: inherit;
  font-size: clamp(1.35rem, 2.2vw, 1.65rem);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0;
  color: var(--ink);
  line-height: 1.25;
}

.proof-label {
  margin-top: 8px;
  font-size: 0.88rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* Sections */
.section { padding: 80px 0; }

.section-alt {
  background: rgba(248, 250, 252, 0.72);
  border-top: 1px solid rgba(229, 231, 235, 0.6);
  border-bottom: 1px solid rgba(229, 231, 235, 0.6);
}

.section-head {
  text-align: center;
  margin-bottom: 48px;
}

.section-head-left {
  text-align: left;
  margin-bottom: 36px;
}

.section-head h2 {
  font-size: clamp(1.65rem, 3vw, 2.15rem);
  color: var(--ink);
  margin-bottom: 10px;
}

.section-head p {
  color: var(--text-muted);
  max-width: 560px;
}

.section-head-left p { margin: 0; }

.section-cta { text-align: center; margin-top: 36px; }

/* Service list (home) */
.service-list {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--line);
}

.service-row {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 24px;
  align-items: center;
  padding: 28px 0;
  border-bottom: 1px solid var(--line);
  transition: background 0.2s, padding-left 0.2s;
}

.service-row:hover {
  padding-left: 8px;
  background: linear-gradient(90deg, var(--primary-light), transparent 40%);
}

.service-num {
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--primary);
  opacity: 0.85;
}

.service-row h3 {
  font-size: 1.15rem;
  margin-bottom: 6px;
  color: var(--ink);
}

.service-row p {
  color: var(--text-muted);
  font-size: 0.94rem;
  max-width: 560px;
}

.service-arrow {
  font-size: 1.25rem;
  color: var(--text-muted);
  transition: transform 0.2s, color 0.2s;
}

.service-row:hover .service-arrow {
  transform: translateX(4px);
  color: var(--primary);
}

/* Legacy card grid (inner pages) */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.card {
  background: var(--bg-white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 24px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.22s, box-shadow 0.22s, border-color 0.22s;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
  border-color: var(--line-strong);
}

.card-icon {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  font-size: 1.35rem;
  font-weight: 700;
}

.card-icon.blue { background: var(--blue-soft); color: var(--primary); }
.card-icon.green { background: var(--green-dim); color: var(--green); }
.card-icon.purple { background: var(--purple-dim); color: var(--purple); }

.card h3 { font-size: 1.12rem; margin-bottom: 10px; color: var(--ink); }
.card p { color: var(--text-muted); font-size: 0.92rem; margin-bottom: 14px; }

.card-link {
  color: var(--primary);
  font-weight: 600;
  font-size: 0.88rem;
}

.card-link:hover { text-decoration: underline; }

/* Stats (inner pages) */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  text-align: center;
}

.stat-item {
  padding: 28px 16px;
  background: var(--bg-white);
  border-radius: var(--radius);
  border: 1px solid var(--line);
}

.stat-icon {
  width: 44px;
  height: 44px;
  margin: 0 auto 14px;
  background: var(--primary-light);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 1.1rem;
}

.stat-num {
  font-family: inherit;
  font-size: 1.65rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--ink);
  margin-bottom: 4px;
}

.stat-label { color: var(--text-muted); font-size: 0.88rem; }

/* Cases */
.case-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.case-card {
  background: var(--bg-white);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
  transition: transform 0.22s, box-shadow 0.22s;
}

.case-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.case-thumb {
  height: 190px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.case-thumb.tone-blue { background: linear-gradient(145deg, #eef2ff, #e2e8f0); }
.case-thumb.tone-green { background: linear-gradient(145deg, #ecfdf3, #d1fae5); }
.case-thumb.tone-slate { background: linear-gradient(145deg, #f1f5f9, #e2e8f0); }

.case-thumb-inner {
  width: 78%;
  height: 68%;
  background: #fff;
  border-radius: 10px;
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.08);
  padding: 12px;
}

.case-thumb-inner.phone {
  width: 46%;
  height: 78%;
  border-radius: 16px;
}

.case-thumb-bar {
  height: 7px;
  width: 38%;
  background: var(--primary);
  border-radius: 4px;
  margin-bottom: 10px;
}

.case-thumb-line {
  height: 5px;
  background: var(--line);
  border-radius: 3px;
  margin-bottom: 6px;
}

.case-body { padding: 22px; }
.case-body h3 { font-size: 1.05rem; margin-bottom: 10px; color: var(--ink); }

.case-tags { display: flex; flex-wrap: wrap; gap: 8px; }

.case-tag {
  padding: 4px 10px;
  background: var(--bg);
  border-radius: 6px;
  font-size: 0.76rem;
  color: var(--text-muted);
  border: 1px solid var(--line);
}

.case-dots {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 28px;
}

.case-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--line-strong);
  border: none;
  cursor: pointer;
  padding: 0;
}

.case-dot.active {
  background: var(--primary);
  width: 22px;
  border-radius: 4px;
}

/* CTA */
.cta-banner {
  background: linear-gradient(135deg, #2b7fff 0%, #1a6ae6 50%, #1557c7 100%);
  border-radius: var(--radius-lg);
  padding: 52px 44px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  color: #fff;
  position: relative;
  overflow: hidden;
}

.cta-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.06'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  opacity: 0.5;
  pointer-events: none;
}

.cta-banner h2 {
  font-size: clamp(1.4rem, 3vw, 1.85rem);
  margin-bottom: 10px;
  position: relative;
}

.cta-banner p {
  color: rgba(255, 255, 255, 0.82);
  max-width: 480px;
  position: relative;
}

.cta-banner .btn { position: relative; flex-shrink: 0; }

/* Page hero */
.page-hero {
  padding: 64px 0 48px;
  background: linear-gradient(180deg, rgba(240, 246, 255, 0.85) 0%, rgba(255, 255, 255, 0.4) 100%);
  border-bottom: 1px solid var(--line);
  text-align: center;
}

.page-hero h1 {
  font-size: clamp(1.75rem, 3vw, 2.35rem);
  color: var(--ink);
  margin-bottom: 12px;
}

.page-hero p {
  color: var(--text-muted);
  max-width: 560px;
  margin: 0 auto;
}

/* Tech / About / Process */
.tech-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.tech-item {
  text-align: center;
  padding: 26px 14px;
  background: var(--bg-white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.tech-item:hover {
  border-color: var(--line-strong);
  box-shadow: var(--shadow-sm);
}

.tech-item .icon { font-size: 1.75rem; margin-bottom: 10px; }
.tech-item h4 { font-size: 0.92rem; margin-bottom: 4px; color: var(--ink); }
.tech-item span { font-size: 0.8rem; color: var(--text-muted); }

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 44px;
  align-items: center;
}

.about-list { list-style: none; margin-top: 22px; }

.about-list li {
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
  display: flex;
  gap: 12px;
  align-items: flex-start;
  color: var(--text-muted);
}

.about-list li::before {
  content: "—";
  color: var(--primary);
  font-weight: 700;
  flex-shrink: 0;
}

.about-visual {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 44px;
  text-align: center;
}

.about-visual img {
  width: 108px;
  height: 108px;
  margin: 0 auto 18px;
  border-radius: 22px;
  box-shadow: var(--shadow);
}

.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}

.process-step { text-align: center; padding: 20px 14px; }

.process-num {
  width: 44px;
  height: 44px;
  background: var(--primary);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: inherit;
  font-weight: 700;
  margin: 0 auto 14px;
}

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 44px;
  align-items: start;
}

.contact-info h3 {
  font-size: 1.1rem;
  margin-bottom: 22px;
  color: var(--ink);
}

.contact-item {
  display: flex;
  gap: 14px;
  margin-bottom: 22px;
}

.contact-item-icon {
  width: 44px;
  height: 44px;
  background: var(--primary-light);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  flex-shrink: 0;
  font-size: 1.1rem;
}

.contact-form {
  background: var(--bg-white);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-sm);
}

.form-field { margin-bottom: 18px; }

.form-field label {
  display: block;
  font-size: 0.86rem;
  font-weight: 600;
  margin-bottom: 7px;
  color: var(--ink);
}

.form-field input,
.form-field textarea,
.form-field select {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  font-size: 0.94rem;
  font-family: inherit;
  background: var(--bg-white);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-field input::placeholder,
.form-field textarea::placeholder {
  color: #94a3b8;
}

.form-field input:focus,
.form-field textarea:focus,
.form-field select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
}

.form-field textarea { min-height: 120px; resize: vertical; }

.form-note {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-top: 12px;
}

.btn-block { width: 100%; }

.contact-brand-box {
  margin-top: 28px;
  padding: 22px;
  background: var(--primary-light);
  border-radius: var(--radius);
  border: 1px solid var(--line);
}

.contact-brand-box img {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  margin-bottom: 12px;
}

.contact-brand-box p {
  font-size: 0.88rem;
  color: var(--text-muted);
}

/* Footer */
.site-footer {
  background: var(--ink);
  color: #94a3b8;
  padding: 56px 0 28px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 36px;
  margin-bottom: 40px;
}

.footer-brand img {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  margin-bottom: 14px;
}

.footer-brand p {
  font-size: 0.88rem;
  line-height: 1.7;
  max-width: 280px;
}

.footer-col h4 {
  color: #fff;
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 700;
  margin-bottom: 14px;
}

.footer-col a {
  display: block;
  padding: 5px 0;
  font-size: 0.86rem;
  transition: color 0.2s;
}

.footer-col a:hover { color: #93c5fd; }

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 22px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  font-size: 0.82rem;
}

.footer-bottom-row {
  width: 100%;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
}

.footer-beian {
  text-align: center;
}

.footer-beian a {
  color: #93c5fd;
  letter-spacing: 0.02em;
}

.footer-bottom a { color: #93c5fd; }

/* Nav featured product */
.nav a.nav-featured {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--primary-dark);
  background: linear-gradient(135deg, rgba(232, 241, 255, 0.95), rgba(237, 233, 254, 0.85));
  border: 1px solid rgba(43, 127, 255, 0.22);
  font-weight: 600;
}

.nav a.nav-featured.active,
.nav a.nav-featured:hover {
  background: var(--primary-light);
  color: var(--primary);
}

.nav-item-img {
  border-radius: 5px;
  flex-shrink: 0;
  object-fit: contain;
}

/* Homepage product rail (left) */
.hero-with-product {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 28px;
  align-items: stretch;
}

.home-product-rail {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 88px;
  padding: 18px 12px;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(43, 127, 255, 0.2);
  background: linear-gradient(180deg, #0f141c 0%, #161b24 100%);
  color: #e4e7ec;
  box-shadow: 0 16px 40px rgba(15, 20, 28, 0.25);
  transition: transform 0.28s var(--ease-out-expo, ease), box-shadow 0.28s var(--ease-out-expo, ease);
  text-align: center;
}

.home-product-rail:hover {
  transform: translateY(-3px);
  box-shadow: 0 20px 48px rgba(15, 20, 28, 0.32);
}

.home-product-rail img {
  border-radius: 10px;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.35);
}

.home-product-rail-text {
  display: flex;
  flex-direction: column;
  gap: 4px;
  line-height: 1.3;
}

.home-product-rail-text strong {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.home-product-rail-text small {
  font-size: 0.68rem;
  color: #8b929e;
  font-weight: 500;
}

.hp-field {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

/* 文哥无限流 product pages */
.wg-hero {
  padding: 72px 0 56px;
}

.wg-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
  gap: 40px;
  align-items: center;
}

.wg-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 0.84rem;
  color: var(--text-muted);
  margin-bottom: 14px;
  font-weight: 500;
}

.wg-eyebrow img { border-radius: 8px; }

.wg-hero-copy h1 {
  font-size: clamp(2rem, 5vw, 2.75rem);
  margin-bottom: 16px;
}

.wg-lead {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 36ch;
  line-height: 1.75;
}

.wg-lead strong { color: var(--ink); }

.wg-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.wg-meta-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  margin-top: 22px;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.wg-meta-list li::before {
  content: "·";
  margin-right: 8px;
  color: var(--primary);
}

.wg-canvas-mock {
  border-radius: 14px;
  overflow: hidden;
  background: #080a0e;
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: 0 24px 60px rgba(8, 10, 14, 0.45);
  font-family: "IBM Plex Sans SC", var(--font-sans);
}

.wg-canvas-top {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  background: #101318;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.wg-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.15);
}

.wg-canvas-title {
  margin-left: 8px;
  font-size: 0.72rem;
  color: #8b929e;
}

.wg-canvas-body {
  display: grid;
  grid-template-columns: 120px 1fr;
  min-height: 220px;
}

.wg-sidebar-mock {
  padding: 12px 10px;
  border-right: 1px solid rgba(255, 255, 255, 0.06);
  background: #0c0e13;
}

.wg-sidebar-item {
  padding: 8px 10px;
  border-radius: 6px;
  font-size: 0.72rem;
  color: #8b929e;
  margin-bottom: 4px;
}

.wg-sidebar-item.active {
  background: #252b36;
  color: #f3f5f9;
}

.wg-flow-mock {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 24px 16px;
  background:
    radial-gradient(circle at 20% 30%, rgba(77, 127, 232, 0.12), transparent 45%),
    #080a0e;
}

.wg-node {
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 0.74rem;
  background: #161a21;
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: #e4e7ec;
  white-space: nowrap;
}

.wg-node.accent {
  border-color: rgba(77, 127, 232, 0.45);
  box-shadow: 0 0 0 1px rgba(77, 127, 232, 0.15);
}

.wg-edge {
  width: 28px;
  height: 2px;
  background: linear-gradient(90deg, rgba(77, 127, 232, 0.2), rgba(77, 127, 232, 0.8));
}

.wg-log-mock {
  padding: 10px 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  background: #0c0e13;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.wg-log-line {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.68rem;
  color: #8b929e;
}

.wg-log-line.ok { color: #34c759; }

.wg-canvas-status {
  margin-left: auto;
  padding: 2px 8px;
  border-radius: 999px;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: #34c759;
  background: rgba(52, 199, 89, 0.12);
  border: 1px solid rgba(52, 199, 89, 0.28);
}

.wg-auto-strip {
  padding: 56px 0 64px;
  background:
    linear-gradient(180deg, rgba(15, 20, 28, 0.04) 0%, transparent 100%),
    var(--bg-alt, #f6f8fb);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.wg-auto-head {
  max-width: 52ch;
  margin-bottom: 28px;
}

.wg-auto-head h2 {
  font-size: clamp(1.35rem, 3vw, 1.75rem);
  margin-bottom: 10px;
}

.wg-auto-head p {
  color: var(--text-muted);
  line-height: 1.75;
}

.wg-auto-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.wg-auto-card {
  padding: 22px 22px 24px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.94);
  box-shadow: var(--shadow-sm);
}

.wg-auto-card-highlight {
  border-color: rgba(43, 127, 255, 0.28);
  background: linear-gradient(180deg, rgba(232, 241, 255, 0.95), rgba(255, 255, 255, 0.98));
}

.wg-auto-tag {
  display: inline-block;
  margin-bottom: 12px;
  padding: 3px 8px;
  border-radius: 6px;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--primary);
  background: var(--primary-light);
}

.wg-auto-card h3 {
  font-size: 1rem;
  margin-bottom: 10px;
}

.wg-auto-card p {
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.7;
}

.wg-feature-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.wg-feature-card {
  padding: 22px 24px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.92);
  box-shadow: var(--shadow-sm);
}

.wg-feature-card h3 {
  font-size: 1rem;
  margin-bottom: 10px;
}

.wg-feature-card p {
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.7;
}

.wg-feature-card-primary {
  border-color: rgba(43, 127, 255, 0.24);
  background: linear-gradient(135deg, rgba(232, 241, 255, 0.85), rgba(255, 255, 255, 0.98));
}

.wg-split {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
  gap: 32px;
  align-items: start;
}

.wg-steps {
  margin-top: 18px;
  padding-left: 1.2rem;
  color: var(--text-muted);
  line-height: 1.85;
}

.wg-steps li { margin-bottom: 10px; }

.wg-steps strong { color: var(--ink); }

.wg-tech-panel {
  padding: 22px 24px;
  border-radius: var(--radius);
  background: var(--primary-light);
  border: 1px solid rgba(43, 127, 255, 0.18);
}

.wg-tech-panel h3 { margin-bottom: 14px; font-size: 1rem; }

.wg-tech-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--ink-soft);
}

.wg-cta { background: linear-gradient(135deg, var(--primary) 0%, #1a5fd4 100%); }

.wg-download-hero .wg-eyebrow { justify-content: center; }

.wg-download-panel {
  max-width: 640px;
  margin: 0 auto 32px;
  padding: 28px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.94);
  box-shadow: var(--shadow);
}

.wg-download-loading,
.wg-download-empty {
  text-align: center;
  color: var(--text-muted);
  padding: 24px 12px;
}

.wg-download-empty h3,
.wg-download-empty.is-error h3 {
  color: var(--ink);
  margin-bottom: 10px;
}

.wg-download-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 20px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line-soft, var(--line));
}

.wg-download-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.wg-download-version {
  font-family: "JetBrains Mono", monospace;
  font-size: 1.75rem;
  font-weight: 600;
  color: var(--primary-dark);
}

.wg-download-meta {
  display: grid;
  gap: 12px;
}

.wg-download-meta div {
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: 12px;
  font-size: 0.88rem;
}

.wg-download-meta dt { color: var(--text-muted); }

.wg-download-meta code {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.78rem;
  background: var(--primary-light);
  padding: 2px 8px;
  border-radius: 4px;
}

.wg-download-changelog {
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.wg-download-changelog h4 {
  font-size: 0.88rem;
  margin-bottom: 8px;
}

.wg-download-changelog p {
  color: var(--text-muted);
  white-space: pre-wrap;
  line-height: 1.7;
  font-size: 0.9rem;
}

.wg-download-notes {
  max-width: 640px;
  margin: 0 auto;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.wg-download-notes h3 {
  color: var(--ink);
  margin-bottom: 12px;
  font-size: 1rem;
}

.wg-download-notes ul {
  padding-left: 1.2rem;
  line-height: 1.85;
}

.wg-download-back { margin-top: 20px; }

.wg-download-back a { color: var(--primary); font-weight: 500; }

/* Motion system */
:root {
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out-quart: cubic-bezier(0.25, 1, 0.5, 1);
  --motion-rise: 0.58s;
}

.site-header {
  transition:
    box-shadow 0.35s var(--ease-out-quart),
    background 0.35s var(--ease-out-quart),
    border-color 0.35s var(--ease-out-quart);
}

.site-header.is-scrolled {
  background: rgba(255, 255, 255, 0.96);
  border-bottom-color: rgba(229, 231, 235, 0.95);
  box-shadow: 0 10px 40px rgba(15, 23, 42, 0.07);
}

@media (prefers-reduced-motion: no-preference) {
  html.motion-ready .hero-copy > *,
  html.motion-ready .home-product-rail,
  html.motion-ready .hero-visual,
  html.motion-ready .wg-hero-copy > *,
  html.motion-ready .wg-hero-visual,
  html.motion-ready .page-hero .container > * {
    opacity: 0;
    animation: motion-rise var(--motion-rise) var(--ease-out-expo) forwards;
  }

  html.motion-ready .hero-copy > *:nth-child(1) { animation-delay: 0.04s; }
  html.motion-ready .hero-copy > *:nth-child(2) { animation-delay: 0.1s; }
  html.motion-ready .hero-copy > *:nth-child(3) { animation-delay: 0.16s; }
  html.motion-ready .hero-copy > *:nth-child(4) { animation-delay: 0.22s; }
  html.motion-ready .hero-copy > *:nth-child(5) { animation-delay: 0.28s; }

  html.motion-ready .home-product-rail { animation-delay: 0.02s; }
  html.motion-ready .hero-visual { animation-delay: 0.24s; }

  html.motion-ready .wg-hero-copy > *:nth-child(1) { animation-delay: 0.04s; }
  html.motion-ready .wg-hero-copy > *:nth-child(2) { animation-delay: 0.1s; }
  html.motion-ready .wg-hero-copy > *:nth-child(3) { animation-delay: 0.16s; }
  html.motion-ready .wg-hero-copy > *:nth-child(4) { animation-delay: 0.22s; }
  html.motion-ready .wg-hero-copy > *:nth-child(5) { animation-delay: 0.28s; }
  html.motion-ready .wg-hero-visual { animation-delay: 0.24s; }

  html.motion-ready .page-hero .container > *:nth-child(1) { animation-delay: 0.04s; }
  html.motion-ready .page-hero .container > *:nth-child(2) { animation-delay: 0.12s; }

  .motion-reveal:not(.is-visible) {
    opacity: 0;
  }

  .motion-reveal.is-visible {
    animation: motion-fade-in 0.48s var(--ease-out-expo) forwards;
    animation-delay: var(--motion-delay, 0s);
  }

  .hero-blob-a { animation: motion-float-a 7.2s ease-in-out infinite; }
  .hero-blob-b { animation: motion-float-b 8.6s ease-in-out infinite 0.6s; }
  .hero-blob-c { animation: motion-float-c 6.8s ease-in-out infinite 1.1s; }

  .hero-panel {
    animation: motion-panel-float 5.4s ease-in-out infinite;
  }

  .hero-tag-dot {
    animation: motion-pulse-dot 2.6s ease-in-out infinite;
  }

  .hero-panel-line.accent {
    background: linear-gradient(90deg, var(--primary), #60a5fa, var(--primary));
    background-size: 200% 100%;
    animation: motion-shimmer 3.2s ease-in-out infinite;
  }

  .hero-panel-tag {
    animation: motion-tag-glow 3s ease-in-out infinite;
  }

  .wg-flow-mock .wg-node {
    animation: motion-node-glow 3s ease-in-out infinite;
  }

  .wg-flow-mock .wg-node:nth-child(1) { animation-delay: 0s; }
  .wg-flow-mock .wg-node:nth-child(3) { animation-delay: 0.75s; }
  .wg-flow-mock .wg-node:nth-child(5) { animation-delay: 1.5s; }
  .wg-flow-mock .wg-node:nth-child(7) { animation-delay: 2.25s; }

  .wg-edge {
    animation: motion-edge-flow 2.4s ease-in-out infinite;
  }

  .wg-flow-mock .wg-edge:nth-child(2) { animation-delay: 0.35s; }
  .wg-flow-mock .wg-edge:nth-child(4) { animation-delay: 1.1s; }
  .wg-flow-mock .wg-edge:nth-child(6) { animation-delay: 1.85s; }

  .wg-canvas-status {
    animation: motion-status-pulse 2.2s ease-in-out infinite;
  }

  html.motion-ready .wg-log-line {
    opacity: 0;
    animation: motion-log-in 0.45s var(--ease-out-expo) forwards;
  }

  html.motion-ready .wg-log-line:nth-child(1) { animation-delay: 0.55s; }
  html.motion-ready .wg-log-line:nth-child(2) { animation-delay: 0.78s; }
  html.motion-ready .wg-log-line:nth-child(3) { animation-delay: 1.01s; }

  .case-card,
  .tech-item,
  .wg-feature-card,
  .wg-auto-card {
    transition:
      transform 0.28s var(--ease-out-expo),
      box-shadow 0.28s var(--ease-out-expo),
      border-color 0.28s var(--ease-out-expo);
  }

  .case-card:hover,
  .tech-item:hover,
  .wg-feature-card:hover,
  .wg-auto-card:hover {
    transform: translateY(-4px);
  }

  .motion-reveal.cta-banner.is-visible:hover {
    transform: translateY(-2px);
    box-shadow: 0 20px 50px rgba(43, 127, 255, 0.22);
  }
}

html:not(.motion-ready) .motion-reveal {
  opacity: 1;
}

html.motion-reduced .motion-reveal,
html.motion-reduced .hero-copy > *,
html.motion-reduced .home-product-rail,
html.motion-reduced .hero-visual,
html.motion-reduced .wg-hero-copy > *,
html.motion-reduced .wg-hero-visual,
html.motion-reduced .page-hero .container > * {
  opacity: 1 !important;
  animation: none !important;
  transition: none !important;
}

html.motion-reduced .wg-log-line {
  opacity: 1 !important;
}

@keyframes motion-rise {
  from { opacity: 0; transform: translate3d(0, 14px, 0); }
  to { opacity: 1; transform: translate3d(0, 0, 0); }
}

@keyframes motion-fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes motion-float-a {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(6px, -12px); }
}

@keyframes motion-float-b {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(-8px, 10px); }
}

@keyframes motion-float-c {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(10px, -8px); }
}

@keyframes motion-panel-float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

@keyframes motion-pulse-dot {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.25); opacity: 0.75; }
}

@keyframes motion-shimmer {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

@keyframes motion-tag-glow {
  0%, 100% { box-shadow: 0 0 0 rgba(34, 197, 94, 0); }
  50% { box-shadow: 0 0 0 4px rgba(34, 197, 94, 0.12); }
}

@keyframes motion-node-glow {
  0%, 100% {
    border-color: rgba(255, 255, 255, 0.08);
    box-shadow: none;
  }
  50% {
    border-color: rgba(77, 127, 232, 0.55);
    box-shadow: 0 0 16px rgba(77, 127, 232, 0.22);
  }
}

@keyframes motion-edge-flow {
  0%, 100% { opacity: 0.45; transform: scaleX(0.85); }
  50% { opacity: 1; transform: scaleX(1); }
}

@keyframes motion-status-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.65; }
}

@keyframes motion-log-in {
  to { opacity: 1; transform: translateX(0); }
}

/* Legacy hero classes (other pages unaffected) */
.tag, .tag-dot, .hero-sub, .hero-grid, .hero-illustration { display: none; }

/* Responsive */
@media (max-width: 992px) {
  .hero-with-product { grid-template-columns: 1fr; }
  .home-product-rail {
    width: 100%;
    flex-direction: row;
    justify-content: flex-start;
    padding: 14px 18px;
  }
  .home-product-rail-text { align-items: flex-start; text-align: left; }
  .wg-hero-grid, .wg-split, .wg-feature-grid, .wg-auto-grid { grid-template-columns: 1fr; }
  .hero-inner, .about-grid, .contact-grid { grid-template-columns: 1fr; }
  .proof-grid { grid-template-columns: repeat(2, 1fr); }
  .card-grid, .case-grid { grid-template-columns: 1fr 1fr; }
  .stats-grid, .tech-grid, .process-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .hero-visual { min-height: 240px; }
  .cta-banner { flex-direction: column; text-align: center; align-items: stretch; }
  .cta-banner .btn { align-self: center; }
}

@media (max-width: 768px) {
  .menu-toggle { display: block; }
  .nav {
    display: none;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    padding: 12px;
    border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow);
  }
  .nav.open { display: flex; }
  .header-cta { display: none; }
  .card-grid, .case-grid { grid-template-columns: 1fr; }
  .proof-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
  .proof-card { padding: 22px 14px 18px; }
  .stats-grid, .tech-grid, .process-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .section { padding: 56px 0; }
  .service-row { grid-template-columns: auto 1fr; }
  .service-arrow { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .proof-card:hover,
  .case-card:hover,
  .tech-item:hover,
  .wg-feature-card:hover,
  .wg-auto-card:hover { transform: none; }
  .home-product-rail:hover { transform: none; }
}