/* ============================================================
   SMIYIN Ltd. / 广州星衍科技 - 官网样式
   主题：星衍紫黑 + 霓虹紫青
   ============================================================ */

:root {
  /* 颜色：星衍紫黑底色 + 霓虹紫青点缀 */
  --bg-0: #07040f;
  --bg-1: #0c0719;
  --bg-2: #140a26;
  --bg-3: #1b0e35;

  --surface: rgba(28, 16, 56, 0.55);
  --surface-2: rgba(40, 22, 78, 0.65);
  --surface-hi: rgba(60, 32, 110, 0.55);

  --line: rgba(168, 130, 255, 0.18);
  --line-hi: rgba(186, 150, 255, 0.35);

  --text: #f3eefe;
  --text-2: #c8b8e8;
  --text-3: #8c7eb4;

  --neon-1: #a855f7;   /* 紫 */
  --neon-2: #8b5cf6;
  --neon-3: #d946ef;   /* 品红紫 */
  --neon-4: #22d3ee;   /* 青 */
  --neon-5: #38bdf8;   /* 天青 */

  --grad-1: linear-gradient(135deg, #a855f7 0%, #6366f1 50%, #22d3ee 100%);
  --grad-2: linear-gradient(135deg, #d946ef 0%, #8b5cf6 60%, #38bdf8 100%);
  --grad-text: linear-gradient(135deg, #c084fc 0%, #e879f9 40%, #67e8f9 100%);

  --shadow-glow: 0 0 40px rgba(168, 85, 247, 0.35), 0 0 80px rgba(34, 211, 238, 0.18);
  --shadow-card: 0 20px 60px -20px rgba(0, 0, 0, 0.7);

  /* 字体 */
  --font-cn: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-en: "Inter", "SF Pro Display", -apple-system, BlinkMacSystemFont, sans-serif;

  /* 尺寸 */
  --container: 1200px;
  --radius-s: 10px;
  --radius-m: 16px;
  --radius-l: 24px;
  --radius-xl: 32px;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-cn);
  font-family: var(--font-en);
  background: var(--bg-0);
  color: var(--text);
  line-height: 1.6;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
html[lang^="zh"] body { font-family: var(--font-cn), var(--font-en); }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: 0; background: transparent; color: inherit; }
ul { margin: 0; padding: 0; list-style: none; }

/* 背景：分层星云 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 70% 50% at 15% 0%, rgba(139, 92, 246, 0.18), transparent 60%),
    radial-gradient(ellipse 60% 50% at 85% 20%, rgba(217, 70, 239, 0.14), transparent 60%),
    radial-gradient(ellipse 80% 70% at 50% 100%, rgba(34, 211, 238, 0.12), transparent 60%),
    var(--bg-0);
  z-index: -2;
  pointer-events: none;
}
body::after {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    radial-gradient(1px 1px at 20% 30%, rgba(255, 255, 255, 0.55), transparent),
    radial-gradient(1px 1px at 60% 70%, rgba(192, 132, 252, 0.6), transparent),
    radial-gradient(1px 1px at 80% 20%, rgba(255, 255, 255, 0.4), transparent),
    radial-gradient(1.5px 1.5px at 30% 80%, rgba(103, 232, 249, 0.55), transparent),
    radial-gradient(1px 1px at 90% 60%, rgba(255, 255, 255, 0.35), transparent);
  background-size: 800px 800px;
  z-index: -1;
  pointer-events: none;
  opacity: 0.7;
}

/* ---------- Layout ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}
.section {
  padding: 110px 0;
  position: relative;
}
.section--tight { padding: 70px 0; }

/* ---------- 通用：标题块 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--line);
  color: var(--text-2);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-weight: 600;
}
.tag::before {
  content: "";
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--neon-3);
  box-shadow: 0 0 12px var(--neon-3);
}
.section-head { max-width: 760px; margin: 0 auto 60px; text-align: center; }
.section-head .tag { margin-bottom: 18px; }
.section-title {
  margin: 0 0 16px;
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.18;
}
.section-title em {
  font-style: normal;
  background: var(--grad-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.section-subtitle {
  margin: 0;
  color: var(--text-2);
  font-size: clamp(15px, 1.5vw, 17px);
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 26px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 15px;
  letter-spacing: 0.01em;
  transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.25s ease;
  white-space: nowrap;
}
.btn--primary {
  background: var(--grad-1);
  color: #fff;
  box-shadow: 0 12px 30px -10px rgba(168, 85, 247, 0.6);
}
.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 18px 40px -10px rgba(168, 85, 247, 0.85);
}
.btn--ghost {
  background: var(--surface);
  border: 1px solid var(--line-hi);
  color: var(--text);
  backdrop-filter: blur(10px);
}
.btn--ghost:hover {
  background: var(--surface-hi);
  transform: translateY(-2px);
}
.btn--lg { padding: 16px 32px; font-size: 16px; }

/* ---------- Header / Nav ---------- */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 18px 0;
  transition: all 0.3s ease;
}
.header.is-scrolled {
  padding: 12px 0;
  background: rgba(7, 4, 15, 0.72);
  backdrop-filter: blur(18px) saturate(140%);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 0.04em;
}
.brand-logo {
  width: 36px; height: 36px;
  border-radius: 10px;
  background: var(--grad-1);
  display: grid;
  place-items: center;
  color: #fff;
  font-weight: 800;
  font-family: var(--font-en);
  box-shadow: 0 8px 24px -6px rgba(168, 85, 247, 0.7);
  position: relative;
}
.brand-logo::after {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: 11px;
  background: var(--grad-2);
  z-index: -1;
  filter: blur(8px);
  opacity: 0.6;
}
.brand-name { display: flex; flex-direction: column; line-height: 1.1; }
.brand-name small { font-size: 11px; color: var(--text-3); font-weight: 500; letter-spacing: 0.08em; }

.nav {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav a {
  padding: 9px 14px;
  border-radius: 999px;
  color: var(--text-2);
  font-size: 14px;
  font-weight: 500;
  transition: all 0.2s ease;
}
.nav a:hover { color: var(--text); background: var(--surface); }

.header-actions { display: flex; align-items: center; gap: 12px; }
.lang-toggle {
  width: 38px; height: 38px;
  border-radius: 10px;
  background: var(--surface);
  border: 1px solid var(--line);
  color: var(--text);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0.05em;
  transition: all 0.2s ease;
}
.lang-toggle:hover {
  background: var(--surface-hi);
  border-color: var(--neon-2);
  box-shadow: 0 0 16px rgba(168, 85, 247, 0.4);
}

.nav-toggle {
  display: none;
  width: 38px; height: 38px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  border-radius: 10px;
  background: var(--surface);
  border: 1px solid var(--line);
}
.nav-toggle span {
  width: 18px; height: 2px;
  background: var(--text);
  transition: all 0.3s ease;
  border-radius: 2px;
}
.nav-toggle.is-active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.is-active span:nth-child(2) { opacity: 0; }
.nav-toggle.is-active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: 180px 0 110px;
  overflow: hidden;
}
.hero[data-hero-glow]::before {
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 600px; height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(168, 85, 247, 0.35) 0%, transparent 70%);
  filter: blur(40px);
  transform: translate(calc(var(--mx, 50%) - 300px), calc(var(--my, 50%) - 300px));
  transition: transform 0.3s ease;
  pointer-events: none;
  z-index: 0;
}
.hero-inner {
  position: relative;
  z-index: 1;
  max-width: 880px;
  margin: 0 auto;
  text-align: center;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--line);
  color: var(--text-2);
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 28px;
  backdrop-filter: blur(10px);
}
.hero-badge::before {
  content: "";
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--neon-4);
  box-shadow: 0 0 12px var(--neon-4);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(1.3); }
}
.hero-title {
  margin: 0 0 24px;
  font-size: clamp(40px, 6vw, 76px);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.03em;
}
.hero-title em {
  display: block;
  font-style: normal;
  background: var(--grad-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-subtitle {
  margin: 0 auto 36px;
  max-width: 720px;
  font-size: clamp(16px, 1.8vw, 19px);
  color: var(--text-2);
  line-height: 1.7;
}
.hero-cta {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 70px;
}
.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  padding: 28px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-l);
  backdrop-filter: blur(20px);
  box-shadow: var(--shadow-card);
}
.hero-stat .num {
  font-family: var(--font-en);
  font-size: clamp(24px, 3.5vw, 38px);
  font-weight: 800;
  background: var(--grad-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
}
.hero-stat .label {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  color: var(--text-3);
  letter-spacing: 0.04em;
}

/* ---------- About ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.about-visual {
  position: relative;
  aspect-ratio: 1 / 1;
  border-radius: var(--radius-xl);
  background: linear-gradient(135deg, rgba(168, 85, 247, 0.18), rgba(34, 211, 238, 0.12));
  border: 1px solid var(--line);
  overflow: hidden;
  display: grid;
  place-items: center;
}
.about-visual::before, .about-visual::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
}
.about-visual::before {
  width: 60%; height: 60%;
  background: radial-gradient(circle, rgba(168, 85, 247, 0.6), transparent 70%);
  top: 10%; left: 10%;
  animation: float 8s ease-in-out infinite;
}
.about-visual::after {
  width: 50%; height: 50%;
  background: radial-gradient(circle, rgba(34, 211, 238, 0.5), transparent 70%);
  bottom: 10%; right: 10%;
  animation: float 10s ease-in-out infinite reverse;
}
@keyframes float {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(20px, -20px); }
}
.about-visual-orb {
  position: relative;
  width: 56%;
  aspect-ratio: 1;
  border-radius: 50%;
  background:
    radial-gradient(circle at 35% 30%, rgba(255, 255, 255, 0.95), rgba(192, 132, 252, 0.85) 35%, rgba(139, 92, 246, 0.6) 60%, rgba(99, 102, 241, 0.2) 100%),
    var(--grad-2);
  box-shadow:
    inset -20px -20px 60px rgba(0, 0, 0, 0.4),
    0 0 100px rgba(168, 85, 247, 0.6);
  animation: spin 30s linear infinite;
}
@keyframes spin {
  to { transform: rotate(360deg); }
}
.about-visual-orb::before {
  content: "";
  position: absolute;
  inset: -25%;
  border-radius: 50%;
  border: 1px dashed rgba(168, 130, 255, 0.3);
  animation: spin 60s linear infinite reverse;
}
.about-visual-orb::after {
  content: "";
  position: absolute;
  inset: -50%;
  border-radius: 50%;
  border: 1px dashed rgba(34, 211, 238, 0.2);
}

.about-text .tag { margin-bottom: 18px; }
.about-text h2 { margin: 0 0 18px; font-size: clamp(28px, 3.5vw, 40px); line-height: 1.18; letter-spacing: -0.02em; }
.about-text p { margin: 0 0 32px; color: var(--text-2); font-size: 16px; }
.about-points {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}
.about-point {
  padding: 22px;
  border-radius: var(--radius-m);
  background: var(--surface);
  border: 1px solid var(--line);
  transition: all 0.3s ease;
}
.about-point:hover {
  background: var(--surface-hi);
  border-color: var(--neon-2);
  transform: translateY(-4px);
  box-shadow: 0 12px 30px -12px rgba(168, 85, 247, 0.5);
}
.about-point .ic {
  width: 38px; height: 38px;
  border-radius: 10px;
  background: var(--grad-1);
  display: grid;
  place-items: center;
  margin-bottom: 12px;
  font-size: 18px;
}
.about-point h4 { margin: 0 0 6px; font-size: 15px; font-weight: 700; }
.about-point p { margin: 0; font-size: 13px; color: var(--text-3); line-height: 1.6; }

/* ---------- Product overview ---------- */
.product-card {
  position: relative;
  padding: 50px 40px;
  border-radius: var(--radius-xl);
  background: var(--surface);
  border: 1px solid var(--line);
  overflow: hidden;
  margin-bottom: 60px;
}
.product-card::before {
  content: "";
  position: absolute;
  top: -100px; right: -100px;
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(168, 85, 247, 0.3), transparent 70%);
  filter: blur(40px);
  pointer-events: none;
}
.product-card-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 50px;
  align-items: center;
}
.product-card h2 {
  margin: 18px 0 12px;
  font-size: clamp(34px, 4.5vw, 56px);
  font-family: var(--font-en);
  font-weight: 800;
  letter-spacing: -0.02em;
  background: var(--grad-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.product-card .subtitle { color: var(--text); font-size: clamp(18px, 2vw, 22px); font-weight: 600; margin: 0 0 18px; }
.product-card .desc { color: var(--text-2); margin: 0 0 28px; font-size: 15px; }

.product-visual {
  position: relative;
  aspect-ratio: 4 / 3;
  border-radius: var(--radius-l);
  background: linear-gradient(135deg, rgba(20, 10, 38, 0.9), rgba(40, 22, 78, 0.7));
  border: 1px solid var(--line-hi);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}
.product-visual-mock {
  position: absolute;
  inset: 18px;
  border-radius: var(--radius-m);
  background: var(--bg-1);
  border: 1px solid var(--line);
  display: grid;
  grid-template-rows: auto 1fr;
  overflow: hidden;
}
.product-visual-mock .topbar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--line);
  background: rgba(7, 4, 15, 0.5);
}
.product-visual-mock .topbar span {
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--neon-2);
  opacity: 0.6;
}
.product-visual-mock .topbar span:nth-child(2) { background: var(--neon-4); }
.product-visual-mock .topbar span:nth-child(3) { background: var(--neon-3); }
.product-visual-mock .topbar .url {
  margin-left: auto;
  font-family: var(--font-en);
  font-size: 11px;
  color: var(--text-3);
  padding: 4px 10px;
  background: var(--surface);
  border-radius: 6px;
  letter-spacing: 0.05em;
}
.product-visual-mock .body {
  display: grid;
  grid-template-columns: 80px 1fr;
  grid-template-rows: 1fr 1fr;
  gap: 8px;
  padding: 12px;
}
.product-visual-mock .panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  position: relative;
  overflow: hidden;
}
.product-visual-mock .panel::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent 40%, rgba(168, 85, 247, 0.15) 70%, transparent 100%);
  animation: shimmer 4s ease-in-out infinite;
}
@keyframes shimmer {
  0%, 100% { opacity: 0.4; }
  50% { opacity: 1; }
}
.product-visual-mock .panel:nth-child(1) { grid-row: span 2; }
.product-visual-mock .panel.chart {
  display: flex;
  align-items: flex-end;
  gap: 6px;
  padding: 14px;
}
.product-visual-mock .panel.chart i {
  flex: 1;
  background: var(--grad-1);
  border-radius: 4px 4px 0 0;
  opacity: 0.85;
  animation: bar 3s ease-in-out infinite;
}
@keyframes bar {
  0%, 100% { height: 30%; }
  50% { height: 95%; }
}
.product-visual-mock .panel.chart i:nth-child(2) { animation-delay: 0.3s; background: var(--grad-2); }
.product-visual-mock .panel.chart i:nth-child(3) { animation-delay: 0.6s; }
.product-visual-mock .panel.chart i:nth-child(4) { animation-delay: 0.9s; background: var(--grad-2); }

/* ---------- Features grid ---------- */
.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.feature-card {
  position: relative;
  padding: 32px 28px;
  border-radius: var(--radius-l);
  background: var(--surface);
  border: 1px solid var(--line);
  backdrop-filter: blur(10px);
  transition: all 0.35s ease;
  overflow: hidden;
}
.feature-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 0%, rgba(168, 85, 247, 0.15), transparent 60%);
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}
.feature-card:hover {
  transform: translateY(-6px);
  border-color: var(--neon-2);
  box-shadow: 0 20px 50px -20px rgba(168, 85, 247, 0.5);
}
.feature-card:hover::before { opacity: 1; }
.feature-ic {
  width: 52px; height: 52px;
  border-radius: 14px;
  background: var(--surface-hi);
  border: 1px solid var(--line-hi);
  display: grid;
  place-items: center;
  margin-bottom: 20px;
  position: relative;
}
.feature-ic svg { width: 24px; height: 24px; color: var(--neon-2); }
.feature-card h3 { margin: 0 0 10px; font-size: 18px; font-weight: 700; }
.feature-card p { margin: 0; color: var(--text-2); font-size: 14px; line-height: 1.65; }

.product-cta { text-align: center; margin-top: 60px; }

/* ---------- Team ---------- */
.team-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  padding: 32px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-l);
  backdrop-filter: blur(20px);
  box-shadow: var(--shadow-card);
  margin-bottom: 50px;
}
.team-stat { text-align: center; }
.team-stat .num {
  font-family: var(--font-en);
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 800;
  background: var(--grad-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
}
.team-stat .label {
  display: block;
  margin-top: 10px;
  font-size: 13px;
  color: var(--text-3);
  letter-spacing: 0.04em;
}

/* ---------- Qualifications ---------- */
.qual-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.qual-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 24px;
  border-radius: var(--radius-m);
  background: var(--surface);
  border: 1px solid var(--line);
  transition: all 0.3s ease;
}
.qual-card:hover {
  background: var(--surface-hi);
  border-color: var(--neon-2);
  transform: translateY(-3px);
}
.qual-ic {
  flex-shrink: 0;
  width: 44px; height: 44px;
  border-radius: 12px;
  background: var(--grad-1);
  display: grid;
  place-items: center;
  font-size: 20px;
  color: #fff;
  box-shadow: 0 8px 20px -8px rgba(168, 85, 247, 0.6);
}
.qual-card span { font-size: 14px; font-weight: 500; line-height: 1.45; }

/* ---------- Services ---------- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.service-card {
  padding: 30px 24px;
  border-radius: var(--radius-l);
  background: var(--surface);
  border: 1px solid var(--line);
  transition: all 0.3s ease;
  position: relative;
}
.service-card::after {
  content: "";
  position: absolute;
  bottom: 0; left: 24px; right: 24px;
  height: 2px;
  background: var(--grad-1);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
  border-radius: 2px;
}
.service-card:hover {
  border-color: var(--neon-2);
  transform: translateY(-4px);
  background: var(--surface-hi);
}
.service-card:hover::after { transform: scaleX(1); }
.service-num {
  font-family: var(--font-en);
  font-size: 14px;
  color: var(--neon-2);
  letter-spacing: 0.1em;
  margin-bottom: 14px;
}
.service-card h3 { margin: 0 0 10px; font-size: 17px; font-weight: 700; }
.service-card p { margin: 0; color: var(--text-2); font-size: 13px; line-height: 1.65; }

/* ---------- Contact ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
  align-items: start;
}
.contact-info {
  padding: 40px;
  border-radius: var(--radius-xl);
  background: var(--surface);
  border: 1px solid var(--line);
  backdrop-filter: blur(15px);
}
.contact-info h3 { margin: 0 0 28px; font-size: 24px; font-weight: 700; }
.contact-list { display: grid; gap: 22px; }
.contact-list li { display: flex; flex-direction: column; gap: 4px; }
.contact-list .lbl {
  font-size: 12px;
  color: var(--text-3);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.contact-list .val {
  font-size: 16px;
  font-weight: 500;
  color: var(--text);
}
.contact-list a.val:hover { color: var(--neon-4); }

.contact-form {
  padding: 40px;
  border-radius: var(--radius-xl);
  background: var(--surface);
  border: 1px solid var(--line);
  backdrop-filter: blur(15px);
}
.contact-form h3 { margin: 0 0 28px; font-size: 24px; font-weight: 700; }
.field { margin-bottom: 18px; }
.field label {
  display: block;
  font-size: 13px;
  color: var(--text-3);
  margin-bottom: 8px;
  letter-spacing: 0.05em;
}
.field input, .field textarea {
  width: 100%;
  padding: 13px 16px;
  background: rgba(7, 4, 15, 0.5);
  border: 1px solid var(--line);
  border-radius: var(--radius-s);
  color: var(--text);
  font: inherit;
  font-size: 14px;
  transition: all 0.2s ease;
}
.field input:focus, .field textarea:focus {
  outline: none;
  border-color: var(--neon-2);
  background: rgba(7, 4, 15, 0.7);
  box-shadow: 0 0 0 4px rgba(168, 85, 247, 0.15);
}
.field textarea { min-height: 110px; resize: vertical; }
.form-note {
  margin-top: 16px;
  padding: 12px 16px;
  border-radius: var(--radius-s);
  background: rgba(34, 211, 238, 0.12);
  border: 1px solid rgba(34, 211, 238, 0.35);
  color: #67e8f9;
  font-size: 14px;
  opacity: 0;
  transform: translateY(-6px);
  transition: all 0.3s ease;
}
.form-note.is-visible { opacity: 1; transform: translateY(0); }

/* ---------- CTA banner ---------- */
.cta-banner {
  position: relative;
  padding: 70px;
  border-radius: var(--radius-xl);
  background:
    linear-gradient(135deg, rgba(168, 85, 247, 0.2) 0%, rgba(34, 211, 238, 0.12) 100%),
    var(--bg-2);
  border: 1px solid var(--line-hi);
  text-align: center;
  overflow: hidden;
}
.cta-banner::before, .cta-banner::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  pointer-events: none;
}
.cta-banner::before {
  width: 300px; height: 300px;
  background: radial-gradient(circle, rgba(217, 70, 239, 0.35), transparent 70%);
  top: -100px; left: -100px;
}
.cta-banner::after {
  width: 350px; height: 350px;
  background: radial-gradient(circle, rgba(34, 211, 238, 0.3), transparent 70%);
  bottom: -150px; right: -100px;
}
.cta-banner > * { position: relative; z-index: 1; }
.cta-banner h2 { margin: 0 0 12px; font-size: clamp(26px, 3.5vw, 40px); font-weight: 700; letter-spacing: -0.02em; }
.cta-banner p { margin: 0 auto 28px; color: var(--text-2); max-width: 620px; }
.cta-banner .btns { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* ---------- Footer ---------- */
.footer {
  padding: 80px 0 40px;
  border-top: 1px solid var(--line);
  background: rgba(7, 4, 15, 0.6);
  backdrop-filter: blur(10px);
}
.footer-top {
  display: grid;
  grid-template-columns: 1.4fr repeat(4, 1fr);
  gap: 40px;
  margin-bottom: 50px;
}
.footer-brand .brand { margin-bottom: 16px; }
.footer-brand p { color: var(--text-3); font-size: 14px; max-width: 280px; }
.footer-col h5 {
  margin: 0 0 18px;
  font-size: 13px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-2);
  font-weight: 600;
}
.footer-col ul { display: grid; gap: 10px; }
.footer-col a {
  font-size: 14px;
  color: var(--text-3);
  transition: color 0.2s ease;
}
.footer-col a:hover { color: var(--neon-4); }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  color: var(--text-3);
  font-size: 13px;
}
.footer-bottom a {
  color: var(--text-3);
  transition: color 0.2s ease;
}
.footer-bottom a:hover { color: var(--neon-4); }

/* ---------- Product detail page ---------- */
.pd-hero {
  padding: 160px 0 100px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.pd-breadcrumb {
  font-size: 13px;
  color: var(--text-3);
  letter-spacing: 0.05em;
  margin-bottom: 22px;
}
.pd-badge { margin-bottom: 24px; }
.pd-title {
  margin: 0 auto 22px;
  max-width: 880px;
  font-size: clamp(34px, 5.5vw, 64px);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
}
.pd-subtitle {
  margin: 0 auto 36px;
  max-width: 720px;
  color: var(--text-2);
  font-size: clamp(16px, 1.8vw, 19px);
  line-height: 1.7;
}
.pd-cta { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.pd-hero-stats {
  margin-top: 70px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

/* Modules grid */
.modules {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.module-card {
  position: relative;
  padding: 34px 28px;
  border-radius: var(--radius-l);
  background: var(--surface);
  border: 1px solid var(--line);
  transition: all 0.35s ease;
  overflow: hidden;
}
.module-card::before {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: var(--radius-l);
  padding: 1px;
  background: var(--grad-1);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}
.module-card:hover::before { opacity: 1; }
.module-card:hover { transform: translateY(-4px); background: var(--surface-hi); }
.module-ic {
  width: 56px; height: 56px;
  border-radius: 14px;
  background: var(--surface-hi);
  border: 1px solid var(--line-hi);
  display: grid;
  place-items: center;
  margin-bottom: 22px;
  font-family: var(--font-en);
  font-weight: 800;
  color: var(--neon-2);
  font-size: 22px;
  box-shadow: 0 0 20px rgba(168, 85, 247, 0.25);
}
.module-card h3 {
  margin: 0 0 10px;
  font-family: var(--font-en);
  font-size: 19px;
  font-weight: 700;
  letter-spacing: -0.01em;
}
.module-card p { margin: 0; color: var(--text-2); font-size: 14px; line-height: 1.65; }

/* Flow steps */
.flow {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  position: relative;
}
.flow::before {
  content: "";
  position: absolute;
  top: 32px;
  left: 12%; right: 12%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--neon-2), var(--neon-4), transparent);
  opacity: 0.4;
}
.flow-step {
  position: relative;
  text-align: center;
  padding: 0 8px;
}
.flow-num {
  width: 64px; height: 64px;
  border-radius: 50%;
  margin: 0 auto 20px;
  background: var(--bg-2);
  border: 2px solid var(--neon-2);
  display: grid;
  place-items: center;
  font-family: var(--font-en);
  font-size: 22px;
  font-weight: 800;
  color: var(--neon-2);
  position: relative;
  z-index: 1;
  box-shadow: 0 0 24px rgba(168, 85, 247, 0.45);
}
.flow-step h4 { margin: 0 0 8px; font-size: 16px; font-weight: 700; }
.flow-step p { margin: 0; color: var(--text-2); font-size: 13px; line-height: 1.6; }

/* Scenarios */
.scenarios {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.scenario-card {
  padding: 32px 30px;
  border-radius: var(--radius-l);
  background: var(--surface);
  border: 1px solid var(--line);
  position: relative;
  transition: all 0.3s ease;
}
.scenario-card:hover {
  border-color: var(--neon-2);
  transform: translateY(-3px);
}
.scenario-tag {
  display: inline-block;
  font-size: 11px;
  letter-spacing: 0.15em;
  color: var(--neon-4);
  margin-bottom: 14px;
  text-transform: uppercase;
  font-weight: 600;
}
.scenario-card h4 { margin: 0 0 10px; font-size: 19px; font-weight: 700; }
.scenario-card p { margin: 0; color: var(--text-2); font-size: 14px; line-height: 1.7; }

/* FAQ */
.faq-list { max-width: 820px; margin: 0 auto; }
.faq-item {
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  background: var(--surface);
  margin-bottom: 14px;
  overflow: hidden;
  transition: all 0.3s ease;
}
.faq-item.is-open {
  border-color: var(--neon-2);
  box-shadow: 0 12px 30px -12px rgba(168, 85, 247, 0.4);
}
.faq-q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 26px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  user-select: none;
}
.faq-q::after {
  content: "+";
  font-size: 24px;
  color: var(--neon-2);
  transition: transform 0.3s ease;
  line-height: 1;
  margin-left: 16px;
}
.faq-item.is-open .faq-q::after { transform: rotate(45deg); }
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  padding: 0 26px;
  color: var(--text-2);
  font-size: 14px;
  line-height: 1.7;
}
.faq-item.is-open .faq-a {
  max-height: 400px;
  padding: 0 26px 22px;
}

/* ---------- Reveal animation ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}
[data-reveal].in-view {
  opacity: 1;
  transform: translateY(0);
}
[data-reveal][data-reveal-delay="1"] { transition-delay: 0.1s; }
[data-reveal][data-reveal-delay="2"] { transition-delay: 0.2s; }
[data-reveal][data-reveal-delay="3"] { transition-delay: 0.3s; }
[data-reveal][data-reveal-delay="4"] { transition-delay: 0.4s; }

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .features, .modules, .qual-grid { grid-template-columns: repeat(2, 1fr); }
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .flow { grid-template-columns: repeat(2, 1fr); gap: 40px 20px; }
  .flow::before { display: none; }
  .footer-top { grid-template-columns: 1fr 1fr 1fr; }
  .footer-brand { grid-column: span 3; }
}

@media (max-width: 768px) {
  .section { padding: 80px 0; }
  .hero { padding: 140px 0 80px; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); gap: 20px; }
  .pd-hero-stats { grid-template-columns: repeat(2, 1fr); gap: 20px; }
  .team-stats { grid-template-columns: repeat(2, 1fr); gap: 20px; padding: 24px; }

  .nav {
    position: fixed;
    top: 0; right: -100%;
    width: 80%;
    max-width: 320px;
    height: 100vh;
    background: var(--bg-2);
    border-left: 1px solid var(--line);
    flex-direction: column;
    align-items: stretch;
    padding: 100px 24px 24px;
    gap: 8px;
    transition: right 0.3s ease;
    z-index: 90;
  }
  .nav.is-open { right: 0; box-shadow: -20px 0 60px rgba(0, 0, 0, 0.6); }
  .nav a { padding: 14px 18px; border-radius: 12px; font-size: 16px; }
  .nav a:hover { background: var(--surface-hi); }
  .nav-toggle { display: flex; }
  body.nav-open::after { opacity: 0; }

  .about-grid, .product-card-inner, .contact-grid { grid-template-columns: 1fr; gap: 36px; }
  .about-visual { max-width: 360px; margin: 0 auto; }
  .features, .modules, .qual-grid, .services-grid, .scenarios { grid-template-columns: 1fr; }
  .flow { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: span 2; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .product-card { padding: 30px 22px; }
  .contact-info, .contact-form { padding: 28px; }
  .cta-banner { padding: 44px 24px; }
  .hero-cta .btn, .pd-cta .btn { width: 100%; }
}

@media (max-width: 480px) {
  .container { padding: 0 18px; }
  .hero-stats, .pd-hero-stats { grid-template-columns: 1fr 1fr; padding: 20px; }
  .about-points { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; }
  .footer-brand { grid-column: span 1; }
}

/* 长内容 reduce motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  [data-reveal] { opacity: 1; transform: none; }
}