/* ===========================================================
   众森德泰 GEO 官网 — Design System
   Deep-tech aesthetic: navy/black canvas + cyan→violet glow
   =========================================================== */

:root {
  /* Canvas */
  --bg:        #05070F;
  --bg-2:      #080C1A;
  --bg-3:      #0B1024;

  /* Surfaces */
  --surface:    rgba(255,255,255,0.025);
  --surface-2:  rgba(255,255,255,0.045);
  --surface-3:  rgba(255,255,255,0.07);
  --border:     rgba(255,255,255,0.09);
  --border-2:   rgba(255,255,255,0.14);

  /* Brand */
  --primary:   #3D7BFF;   /* electric blue */
  --cyan:      #36E0FF;   /* signal cyan   */
  --violet:    #8C6CFF;   /* nebula violet */
  --mint:      #2FE6B0;   /* success mint  */

  /* Text */
  --text:      #EEF3FF;
  --text-dim:  #9AA6C7;
  --text-mute: #5E6A8C;

  /* Glow gradients */
  --grad-brand: linear-gradient(105deg, #36E0FF 0%, #3D7BFF 45%, #8C6CFF 100%);
  --grad-soft:  linear-gradient(120deg, rgba(54,224,255,0.16), rgba(140,108,255,0.16));

  --radius:    18px;
  --radius-lg: 26px;
  --radius-sm: 12px;

  --maxw: 1200px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);

  --font-zh: "Noto Sans SC", -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-en: "Space Grotesk", var(--font-zh);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-zh);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  letter-spacing: 0.01em;
}

/* Ambient page background: grid + nebula orbs */
.bg-field {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(900px 600px at 78% -8%, rgba(61,123,255,0.18), transparent 60%),
    radial-gradient(800px 700px at 8% 12%, rgba(140,108,255,0.13), transparent 60%),
    radial-gradient(1000px 800px at 50% 110%, rgba(54,224,255,0.10), transparent 60%),
    var(--bg);
}
.bg-grid {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255,255,255,0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.035) 1px, transparent 1px);
  background-size: 58px 58px;
  -webkit-mask-image: radial-gradient(circle at 50% 30%, #000 0%, transparent 75%);
          mask-image: radial-gradient(circle at 50% 30%, #000 0%, transparent 75%);
  opacity: 0.6;
}

main, header, footer { position: relative; z-index: 1; }

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

/* ---------- Layout helpers ---------- */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 28px;
}
section { padding: 120px 0; position: relative; }
.section-head { max-width: 760px; margin: 0 auto 64px; text-align: center; }
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-en);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--cyan);
  padding: 7px 14px;
  border: 1px solid var(--border);
  border-radius: 100px;
  background: var(--surface);
  margin-bottom: 22px;
}
.eyebrow::before {
  content: "";
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 12px var(--cyan);
}
h1, h2, h3 { font-weight: 700; line-height: 1.18; letter-spacing: -0.01em; }
.section-head h2 { font-size: clamp(30px, 4vw, 48px); }
.section-head p { color: var(--text-dim); font-size: 17px; margin-top: 18px; }
.grad-text {
  background: var(--grad-brand);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  font-family: var(--font-zh);
  font-size: 15.5px;
  font-weight: 500;
  padding: 14px 26px;
  border-radius: 100px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .25s var(--ease), box-shadow .25s var(--ease), background .25s;
  white-space: nowrap;
}
.btn-primary {
  color: #04122E;
  background: var(--grad-brand);
  box-shadow: 0 8px 30px rgba(61,123,255,0.35), inset 0 1px 0 rgba(255,255,255,0.4);
  font-weight: 600;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 14px 44px rgba(61,123,255,0.5); }
.btn-ghost {
  color: var(--text);
  background: var(--surface-2);
  border-color: var(--border-2);
  backdrop-filter: blur(8px);
}
.btn-ghost:hover { background: var(--surface-3); transform: translateY(-2px); }
.btn svg { width: 17px; height: 17px; }

/* ---------- Cards ---------- */
.card {
  position: relative;
  background: linear-gradient(180deg, rgba(255,255,255,0.045), rgba(255,255,255,0.012));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px;
  transition: transform .35s var(--ease), border-color .35s, box-shadow .35s;
}
.card:hover {
  transform: translateY(-4px);
  border-color: var(--border-2);
  box-shadow: 0 24px 60px rgba(0,0,0,0.45);
}

/* ===========================================================
   NAV
   =========================================================== */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  transition: background .3s, border-color .3s, backdrop-filter .3s;
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  background: rgba(6,8,16,0.72);
  backdrop-filter: blur(18px) saturate(1.4);
  border-bottom-color: var(--border);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 74px;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 28px;
}
.logo { display: flex; align-items: center; gap: 11px; font-weight: 700; font-size: 19px; }
.logo-mark {
  width: 34px; height: 34px;
  border-radius: 9px;
  background: var(--grad-brand);
  display: grid; place-items: center;
  box-shadow: 0 4px 18px rgba(61,123,255,0.45);
  position: relative;
}
.logo-mark svg { width: 20px; height: 20px; }
.logo small { display: block; font-size: 10.5px; font-weight: 500; color: var(--text-mute); letter-spacing: 0.18em; font-family: var(--font-en); }
.nav-links { display: flex; align-items: center; gap: 34px; }
.nav-links a {
  font-size: 15px;
  color: var(--text-dim);
  transition: color .2s;
  position: relative;
}
.nav-links a:hover { color: var(--text); }
.nav-cta { display: flex; align-items: center; gap: 16px; }
.nav-phone { font-family: var(--font-en); font-weight: 600; color: var(--text); font-size: 16px; display: flex; align-items: center; gap: 7px; }
.nav-phone svg { width: 16px; height: 16px; color: var(--cyan); }
.nav-toggle { display: none; }

/* ===========================================================
   HERO
   =========================================================== */
.hero {
  position: relative;
  overflow: hidden;
  padding: 168px 0 90px;
  min-height: 760px;
  isolation: isolate;
  background: #05070f;
}
.hero-bg-video {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  background: #05070f url("assets/hero-ai-tech-atmosphere.png") center / cover no-repeat;
}
.hero-bg-video video {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
  object-position: center right;
  opacity: 0.48;
  filter: saturate(1.04) contrast(1.02) brightness(0.68);
  transform: none;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    linear-gradient(90deg, rgba(5,7,15,0.94) 0%, rgba(5,7,15,0.82) 34%, rgba(5,7,15,0.42) 72%, rgba(5,7,15,0.66) 100%),
    radial-gradient(circle at 18% 72%, rgba(54,224,255,0.16), transparent 34%),
    radial-gradient(circle at 82% 24%, rgba(140,108,255,0.18), transparent 34%);
}
.hero-bg-video::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  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: 64px 64px;
  opacity: 0.38;
  -webkit-mask-image: radial-gradient(circle at 58% 38%, #000 0%, transparent 78%);
          mask-image: radial-gradient(circle at 58% 38%, #000 0%, transparent 78%);
}
.hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 170px;
  z-index: 0;
  pointer-events: none;
  background: linear-gradient(180deg, transparent, var(--bg));
}
.hero-grid {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 56px;
  align-items: center;
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 8px 8px 8px 16px;
  border: 1px solid var(--border);
  border-radius: 100px;
  background: rgba(255,255,255,0.055);
  backdrop-filter: blur(16px);
  font-size: 13.5px; color: var(--text-dim);
  margin-bottom: 28px;
}
.hero-badge b { color: var(--text); font-weight: 600; }
.hero-badge .tag {
  font-family: var(--font-en); font-size: 11px; font-weight: 600;
  color: #04122E; background: var(--grad-brand);
  padding: 4px 10px; border-radius: 100px; letter-spacing: 0.08em;
}
.hero h1 {
  font-size: clamp(38px, 5.4vw, 66px);
  line-height: 1.1;
  margin-bottom: 26px;
  letter-spacing: -0.02em;
}
.hero p.lead {
  font-size: 18.5px;
  color: #c4cce2;
  max-width: 540px;
  margin-bottom: 36px;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(118px, 1fr));
  gap: 18px;
  width: min(100%, 560px);
  margin: 52px auto 0;
  padding-top: 34px;
  border-top: 1px solid var(--border);
  text-align: center;
  justify-items: center;
}
.hero-stat {
  width: 100%;
}
.hero-stat .num { font-family: var(--font-en); font-size: 34px; font-weight: 700; }
.hero-stat .lbl {
  font-size: 13.5px;
  color: var(--text-mute);
  margin-top: 2px;
  white-space: nowrap;
}

.hero-visual { position: relative; }

/* AI chat demo card */
.chat-demo {
  position: relative;
  z-index: 2;
  background: linear-gradient(180deg, rgba(16,22,46,0.78), rgba(8,11,24,0.82));
  border: 1px solid var(--border-2);
  border-radius: var(--radius-lg);
  padding: 22px;
  box-shadow: 0 40px 100px rgba(0,0,0,0.6), 0 0 0 1px rgba(54,224,255,0.06);
  backdrop-filter: blur(18px) saturate(1.18);
}
.chat-demo::before {
  content: "";
  position: absolute; inset: -1px;
  border-radius: var(--radius-lg);
  padding: 1px;
  background: linear-gradient(140deg, rgba(54,224,255,0.5), transparent 35%, transparent 65%, rgba(140,108,255,0.5));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude;
  pointer-events: none;
}
.chat-top { display: flex; align-items: center; gap: 9px; padding: 4px 6px 16px; border-bottom: 1px solid var(--border); margin-bottom: 16px; }
.chat-top .dot { width: 10px; height: 10px; border-radius: 50%; background: var(--surface-3); }
.chat-top .dot:nth-child(1){ background:#FF6058; } .chat-top .dot:nth-child(2){ background:#FFBD2E; } .chat-top .dot:nth-child(3){ background:#28CA42; }
.chat-top span { margin-left: auto; font-family: var(--font-en); font-size: 12px; color: var(--text-mute); display: flex; align-items: center; gap: 6px; }
.chat-top span::before { content:""; width:6px; height:6px; border-radius:50%; background: var(--mint); box-shadow: 0 0 8px var(--mint); }
.bubble { max-width: 90%; padding: 13px 16px; border-radius: 14px; font-size: 14.5px; line-height: 1.6; margin-bottom: 14px; }
.bubble.user { margin-left: auto; background: var(--surface-3); border: 1px solid var(--border); border-bottom-right-radius: 4px; color: var(--text); }
.bubble.ai { background: rgba(61,123,255,0.08); border: 1px solid rgba(61,123,255,0.2); border-bottom-left-radius: 4px; }
.bubble.ai .ai-tag { display: flex; align-items: center; gap: 7px; font-size: 12px; color: var(--cyan); margin-bottom: 9px; font-weight: 500; }
.bubble.ai .ai-tag svg { width: 14px; height: 14px; }
.bubble.ai .line { color: var(--text-dim); }
.brand-hit {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--grad-soft);
  border: 1px solid rgba(54,224,255,0.4);
  color: var(--text); font-weight: 600;
  padding: 2px 9px; border-radius: 7px;
  box-shadow: 0 0 18px rgba(54,224,255,0.25);
}
.brand-hit::before { content:"★"; color: var(--cyan); font-size: 12px; }
.typing { display: inline-flex; gap: 4px; padding: 4px 0; }
.typing i { width: 7px; height: 7px; border-radius: 50%; background: var(--text-mute); animation: blink 1.2s infinite; }
.typing i:nth-child(2){ animation-delay: .2s; } .typing i:nth-child(3){ animation-delay: .4s; }
@keyframes blink { 0%,60%,100%{ opacity:.25; transform: translateY(0);} 30%{ opacity:1; transform: translateY(-3px);} }

/* Floating platform chips around hero */
.float-chip {
  position: absolute;
  z-index: 3;
  display: flex; align-items: center; gap: 8px;
  padding: 8px 14px 8px 10px;
  background: rgba(12,16,32,0.85);
  border: 1px solid var(--border-2);
  border-radius: 100px;
  font-size: 13px; font-weight: 500;
  backdrop-filter: blur(8px);
  box-shadow: 0 12px 30px rgba(0,0,0,0.4);
  animation: floaty 5s ease-in-out infinite;
}
.float-logo {
  width: 22px;
  height: 22px;
  border-radius: 7px;
  object-fit: cover;
  background: #fff;
  box-shadow: 0 5px 14px rgba(0,0,0,0.28);
}
@keyframes floaty { 0%,100%{ transform: translateY(0);} 50%{ transform: translateY(-12px);} }

/* ===========================================================
   MARQUEE — platform coverage
   =========================================================== */
.marquee-wrap { padding: 54px 0; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); overflow: hidden; }
.marquee-label { text-align: center; color: var(--text-mute); font-size: 13.5px; letter-spacing: 0.16em; margin-bottom: 30px; }
.marquee { display: flex; gap: 18px; width: max-content; animation: scroll-x 32s linear infinite; }
.marquee:hover { animation-play-state: paused; }
@keyframes scroll-x { to { transform: translateX(-50%); } }
.plat {
  display: flex; align-items: center; gap: 11px;
  padding: 12px 22px 12px 14px;
  border: 1px solid var(--border);
  border-radius: 100px;
  background: rgba(255,255,255,0.05);
  backdrop-filter: blur(14px);
  white-space: nowrap;
  font-size: 16px; font-weight: 500;
  color: var(--text-dim);
}
.plat-logo {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  object-fit: cover;
  background: #fff;
  flex-shrink: 0;
  box-shadow: 0 6px 18px rgba(0,0,0,0.28);
}

/* ===========================================================
   PAIN / SHIFT
   =========================================================== */
.shift-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin-top: 18px; }
.shift-card { text-align: left; }
.shift-card .big { font-family: var(--font-en); font-size: 50px; font-weight: 700; line-height: 1; margin-bottom: 14px; }
.shift-card h3 { font-size: 19px; margin-bottom: 8px; }
.shift-card p { color: var(--text-dim); font-size: 15px; }

/* ===========================================================
   SERVICES
   =========================================================== */
.svc-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.svc-card { display: flex; flex-direction: column; min-height: 256px; }
.svc-icon {
  width: 52px; height: 52px; border-radius: 14px;
  display: grid; place-items: center;
  background: var(--grad-soft);
  border: 1px solid var(--border-2);
  margin-bottom: 22px;
}
.svc-icon svg { width: 26px; height: 26px; color: var(--cyan); }
.svc-card h3 { font-size: 20px; margin-bottom: 11px; }
.svc-card p { color: var(--text-dim); font-size: 15px; flex: 1; }
.svc-card .more { margin-top: 16px; font-size: 12.5px; color: var(--cyan); display: inline-flex; align-items: center; gap: 5px; opacity: .7; transition: gap .2s, opacity .2s; align-self: flex-start; }
.svc-card .more svg { width: 13px; height: 13px; }
.svc-card:hover .more { gap: 8px; opacity: 1; }
.svc-num { position: absolute; top: 26px; right: 28px; font-family: var(--font-en); font-size: 13px; color: var(--text-mute); }

/* ===========================================================
   WHY US
   =========================================================== */
.why-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.why-card { text-align: left; padding: 32px 26px; }
.why-card .num { font-family: var(--font-en); font-size: 44px; font-weight: 700; line-height: 1; margin-bottom: 6px; }
.why-card .unit { font-size: 18px; color: var(--text-dim); font-weight: 500; }
.why-card .lbl { font-size: 15px; color: var(--text-dim); margin-top: 12px; }

.feat-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; margin-top: 22px; }
.feat { display: flex; gap: 18px; align-items: flex-start; padding: 26px; }
.feat .fi { width: 46px; height: 46px; border-radius: 12px; background: var(--surface-2); border: 1px solid var(--border); display: grid; place-items: center; flex-shrink: 0; }
.feat .fi svg { width: 23px; height: 23px; color: var(--cyan); }
.feat h3 { font-size: 18px; margin-bottom: 7px; }
.feat p { color: var(--text-dim); font-size: 14.5px; }

/* ===========================================================
   PROCESS
   =========================================================== */
.proc-track { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; position: relative; }
.proc-track::before {
  content:""; position: absolute; top: 34px; left: 8%; right: 8%; height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-2), transparent);
}
.proc-step { text-align: center; position: relative; }
.proc-num {
  width: 68px; height: 68px; margin: 0 auto 22px;
  border-radius: 50%;
  display: grid; place-items: center;
  font-family: var(--font-en); font-size: 24px; font-weight: 700;
  background: var(--bg-3);
  border: 1px solid var(--border-2);
  position: relative; z-index: 1;
  color: var(--cyan);
}
.proc-step:hover .proc-num { border-color: var(--cyan); box-shadow: 0 0 26px rgba(54,224,255,0.3); }
.proc-step h3 { font-size: 18px; margin-bottom: 9px; }
.proc-step p { color: var(--text-dim); font-size: 14.5px; padding: 0 8px; }

/* ===========================================================
   CASES / RESULTS
   =========================================================== */
.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.case-card { display: flex; flex-direction: column; }
.case-tag { font-size: 12.5px; color: var(--cyan); font-weight: 500; margin-bottom: 14px; letter-spacing: 0.04em; }
.case-card h3 { font-size: 19px; margin-bottom: 10px; }
.case-card .desc { color: var(--text-dim); font-size: 14.5px; flex: 1; margin-bottom: 22px; }
.case-metrics { display: flex; gap: 24px; padding-top: 20px; border-top: 1px solid var(--border); }
.case-metrics .num { font-family: var(--font-en); font-size: 26px; font-weight: 700; }
.case-metrics .lbl { font-size: 12px; color: var(--text-mute); margin-top: 2px; }

/* ===========================================================
   PRICING
   =========================================================== */
.price-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; align-items: stretch; }
.price-card { display: flex; flex-direction: column; padding: 34px 30px; }
.price-card.featured {
  border-color: rgba(54,224,255,0.4);
  background: linear-gradient(180deg, rgba(54,224,255,0.07), rgba(140,108,255,0.04));
  box-shadow: 0 30px 70px rgba(0,0,0,0.4);
}
.price-card .ptag { font-size: 14px; color: var(--text-dim); font-weight: 500; margin-bottom: 6px; display: flex; align-items: center; gap: 10px; }
.price-card .ptag .pop { font-size: 11px; color: #04122E; background: var(--grad-brand); padding: 3px 9px; border-radius: 100px; font-weight: 700; }
.price-card .pname { font-size: 24px; font-weight: 700; margin-bottom: 16px; }
.price-card .pprice { font-family: var(--font-en); font-size: 40px; font-weight: 700; line-height: 1; }
.price-card .pprice small { font-size: 15px; color: var(--text-mute); font-weight: 500; font-family: var(--font-zh); }
.price-card .pdesc { color: var(--text-dim); font-size: 14px; margin: 14px 0 24px; }
.price-feats { list-style: none; display: flex; flex-direction: column; gap: 13px; margin-bottom: 28px; flex: 1; }
.price-feats li { display: flex; align-items: flex-start; gap: 11px; font-size: 14.5px; color: var(--text-dim); }
.price-feats li svg { width: 18px; height: 18px; color: var(--mint); flex-shrink: 0; margin-top: 2px; }

/* ===========================================================
   FAQ
   =========================================================== */
.faq-wrap { max-width: 840px; margin: 0 auto; display: flex; flex-direction: column; gap: 14px; }
.faq-item { border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); overflow: hidden; transition: border-color .3s; }
.faq-item.open { border-color: var(--border-2); }
.faq-q { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 22px 26px; cursor: pointer; font-size: 17px; font-weight: 500; }
.faq-q .pm { width: 26px; height: 26px; flex-shrink: 0; border-radius: 50%; border: 1px solid var(--border-2); display: grid; place-items: center; transition: transform .3s, background .3s; }
.faq-item.open .pm { transform: rotate(45deg); background: var(--surface-3); }
.faq-q .pm svg { width: 14px; height: 14px; color: var(--cyan); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height .4s var(--ease); }
.faq-a p { padding: 0 26px 24px; color: var(--text-dim); font-size: 15px; }

/* ===========================================================
   CTA / LEAD
   =========================================================== */
.cta-section { padding: 110px 0; }
.cta-box {
  position: relative;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-2);
  background: linear-gradient(135deg, rgba(61,123,255,0.12), rgba(140,108,255,0.08));
  overflow: hidden;
  display: grid; grid-template-columns: 1.1fr 0.9fr;
}
.cta-box::before {
  content:""; position: absolute; inset: 0;
  background: radial-gradient(700px 400px at 12% 0%, rgba(54,224,255,0.18), transparent 60%);
  pointer-events: none;
}
.cta-left { padding: 56px 52px; position: relative; }
.cta-left h2 { font-size: clamp(28px, 3.6vw, 42px); margin-bottom: 18px; }
.cta-left p { color: var(--text-dim); font-size: 16.5px; margin-bottom: 30px; }
.cta-contacts { display: flex; flex-direction: column; gap: 16px; }
.cta-contacts .row { display: flex; align-items: center; gap: 14px; font-size: 16px; }
.cta-contacts .row .ci { width: 42px; height: 42px; border-radius: 11px; background: var(--surface-2); border: 1px solid var(--border); display: grid; place-items: center; }
.cta-contacts .row .ci svg { width: 20px; height: 20px; color: var(--cyan); }
.cta-contacts .row small { display: block; color: var(--text-mute); font-size: 12.5px; }
.cta-contacts .row b { font-family: var(--font-en); font-size: 19px; font-weight: 600; letter-spacing: 0.02em; }

.lead-form { padding: 44px 46px; background: rgba(6,9,18,0.55); border-left: 1px solid var(--border); position: relative; }
.lead-form h3 { font-size: 21px; margin-bottom: 6px; }
.lead-form .sub { color: var(--text-dim); font-size: 14px; margin-bottom: 26px; }
.field { margin-bottom: 16px; }
.field label { display: block; font-size: 13px; color: var(--text-dim); margin-bottom: 8px; }
.field input, .field select, .field textarea {
  width: 100%;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 13px 15px;
  color: var(--text);
  font-family: var(--font-zh);
  font-size: 15px;
  transition: border-color .2s, box-shadow .2s;
}
.field input::placeholder, .field textarea::placeholder { color: var(--text-mute); }
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-color: var(--cyan);
  box-shadow: 0 0 0 3px rgba(54,224,255,0.12);
}
.field select { appearance: none; cursor: pointer; }
.lead-form .btn { width: 100%; margin-top: 6px; }
.form-note { text-align: center; font-size: 12.5px; color: var(--text-mute); margin-top: 14px; }
.form-ok { display: none; text-align: center; padding: 40px 0; }
.form-ok.show { display: block; }
.form-ok .ok-ic { width: 64px; height: 64px; margin: 0 auto 18px; border-radius: 50%; background: var(--grad-soft); border: 1px solid rgba(47,230,176,0.4); display: grid; place-items: center; }
.form-ok .ok-ic svg { width: 32px; height: 32px; color: var(--mint); }
.form-ok h3 { margin-bottom: 8px; }
.form-ok p { color: var(--text-dim); font-size: 14.5px; }

/* ===========================================================
   FOOTER
   =========================================================== */
.footer { border-top: 1px solid var(--border); padding: 64px 0 36px; }
.footer-top { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 44px; border-bottom: 1px solid var(--border); }
.footer-brand p { color: var(--text-dim); font-size: 14.5px; margin-top: 18px; max-width: 320px; }
.footer-col h4 { font-size: 14px; color: var(--text); margin-bottom: 18px; }
.footer-col a { display: block; color: var(--text-dim); font-size: 14px; margin-bottom: 12px; transition: color .2s; }
.footer-col a:hover { color: var(--cyan); }
.footer-bot { display: flex; align-items: center; justify-content: space-between; padding-top: 28px; flex-wrap: wrap; gap: 12px; }
.footer-bot p { color: var(--text-mute); font-size: 13px; }

/* ===========================================================
   SCROLL REVEAL
   =========================================================== */
/* Base = VISIBLE (safe default). Only "armed" below-fold elements hide,
   then reveal on scroll. ".shown" is a hard safety that can't stay hidden. */
.reveal { opacity: 1; transform: none; transition: opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.armed:not(.in):not(.shown) { opacity: 0; transform: translateY(26px); }
.reveal.shown { opacity: 1 !important; transform: none !important; transition: none !important; }
.reveal.d1 { transition-delay: .07s; } .reveal.d2 { transition-delay: .14s; }
.reveal.d3 { transition-delay: .21s; } .reveal.d4 { transition-delay: .28s; }
@media (prefers-reduced-motion: reduce) {
  .reveal, .reveal.armed { opacity: 1 !important; transform: none !important; transition: none !important; }
  .marquee, .float-chip { animation: none; }
}

/* ===========================================================
   RESPONSIVE
   =========================================================== */
@media (max-width: 980px) {
  section { padding: 88px 0; }
  .hero-grid { grid-template-columns: 1fr; gap: 44px; }
  .hero { padding: 130px 0 60px; }
  .hero-bg-video video {
    opacity: 0.34;
    object-position: center right;
  }
  .hero::before {
    background:
      linear-gradient(180deg, rgba(5,7,15,0.96) 0%, rgba(5,7,15,0.86) 46%, rgba(5,7,15,0.72) 100%),
      radial-gradient(circle at 46% 72%, rgba(54,224,255,0.16), transparent 38%);
  }
  .shift-grid, .svc-grid, .why-grid, .feat-grid, .proc-track, .case-grid, .price-grid { grid-template-columns: 1fr 1fr; }
  .proc-track::before { display: none; }
  .cta-box { grid-template-columns: 1fr; }
  .lead-form { border-left: none; border-top: 1px solid var(--border); }
  .footer-top { grid-template-columns: 1fr 1fr; gap: 30px; }
  .nav-links, .nav-phone { display: none; }
}
@media (max-width: 600px) {
  .container { padding: 0 18px; }
  .shift-grid, .svc-grid, .why-grid, .feat-grid, .proc-track, .case-grid, .price-grid, .footer-top { grid-template-columns: 1fr; }
  .hero-stats {
    grid-template-columns: 1fr;
    width: min(100%, 260px);
    gap: 18px;
  }
  .hero {
    min-height: 780px;
  }
  .hero-bg-video video {
    opacity: 0.26;
  }
  .cta-left, .lead-form { padding: 36px 26px; }
  .float-chip { display: none; }
}