/* ============================================================
   奇妙信息技术服务工作室 - 官网样式
   三亚市吉阳区 · 备案展示型官网
   ============================================================ */

/* ---------- CSS Variables ---------- */
:root {
  --c-bg: #080c14;
  --c-surface: #0e1420;
  --c-surface2: #141b2d;
  --c-border: rgba(255, 255, 255, 0.07);
  --c-border2: rgba(255, 255, 255, 0.13);

  --c-text: #c8cfe0;
  --c-text-dim: #6b7a96;
  --c-text-bright: #e8edf5;

  --c-accent: #00d4ff;
  --c-accent2: #7c3aed;
  --c-accent-glow: rgba(0, 212, 255, 0.18);
  --c-accent2-glow: rgba(124, 58, 237, 0.18);

  --c-tag-bg: rgba(0, 212, 255, 0.1);
  --c-tag-text: #00d4ff;
  --c-card-bg: rgba(14, 20, 32, 0.85);

  --radius: 14px;
  --radius-sm: 8px;
  --radius-lg: 20px;

  --font-display: 'ZCOOL XiaoWei', serif;
  --font-body: 'Noto Sans SC', -apple-system, sans-serif;

  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-out: cubic-bezier(0.0, 0, 0.2, 1);

  --shadow-card: 0 8px 40px rgba(0, 0, 0, 0.45), 0 1px 0 rgba(255,255,255,0.04) inset;
  --shadow-glow: 0 0 40px rgba(0, 212, 255, 0.12);

  --max-w: 1180px;
  --section-py: 110px;
}

/* ---------- Reset & Base ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  background: var(--c-bg);
  color: var(--c-text);
  line-height: 1.7;
  overflow-x: hidden;
}

img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: var(--c-bg); }
::-webkit-scrollbar-thumb { background: var(--c-accent2); border-radius: 99px; }
::selection { background: rgba(0,212,255,0.25); color: #fff; }

/* ---------- Container ---------- */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 28px;
}

/* ---------- Typography Helpers ---------- */
.section-label {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 28px;
}
.label-num {
  font-family: var(--font-display);
  font-size: 1.6rem;
  color: var(--c-accent);
  opacity: 0.7;
  line-height: 1;
}
.label-text {
  font-size: 0.8rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-text-dim);
  font-weight: 500;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4.5vw, 3.1rem);
  font-weight: 400;
  line-height: 1.25;
  color: var(--c-text-bright);
  letter-spacing: 0.02em;
}
.section-title em {
  font-style: normal;
  background: linear-gradient(135deg, var(--c-accent) 0%, #60a5fa 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.section-title.center { text-align: center; }
.section-sub {
  text-align: center;
  color: var(--c-text-dim);
  font-size: 1.05rem;
  margin: -10px 0 60px;
  letter-spacing: 0.02em;
}

/* ============================================================
   NAVBAR
   ============================================================ */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  transition: background 0.4s var(--ease-smooth), backdrop-filter 0.4s, box-shadow 0.4s;
  padding: 0;
}
.navbar.scrolled {
  background: rgba(8, 12, 20, 0.88);
  backdrop-filter: blur(20px) saturate(1.4);
  -webkit-backdrop-filter: blur(20px) saturate(1.4);
  box-shadow: 0 1px 0 var(--c-border);
}
.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 28px;
  height: 68px;
  display: flex;
  align-items: center;
  gap: 40px;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-mark {
  width: 36px; height: 36px;
  background: linear-gradient(135deg, var(--c-accent), var(--c-accent2));
  border-radius: 9px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 1.15rem;
  color: #fff;
  font-weight: 700;
  box-shadow: 0 4px 14px rgba(0,212,255,0.35);
  flex-shrink: 0;
}
.logo-text {
  font-family: var(--font-display);
  font-size: 1.05rem;
  color: var(--c-text-bright);
  letter-spacing: 0.06em;
  white-space: nowrap;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: auto;
}
.nav-links a {
  font-size: 0.875rem;
  color: var(--c-text-dim);
  padding: 6px 14px;
  border-radius: 6px;
  transition: color 0.25s, background 0.25s;
  font-weight: 400;
  letter-spacing: 0.02em;
}
.nav-links a:hover,
.nav-links a.active { color: var(--c-accent); background: var(--c-accent-glow); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  margin-left: auto;
}
.nav-toggle span {
  display: block;
  width: 22px; height: 2px;
  background: var(--c-text);
  border-radius: 2px;
  transition: all 0.3s var(--ease-smooth);
}

/* ============================================================
   HERO
   ============================================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding-top: 68px;
}

.hero-bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,212,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,212,255,0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 70% at 50% 50%, black 30%, transparent 100%);
}

.hero-particles {
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.particle {
  position: absolute;
  border-radius: 50%;
  background: var(--c-accent);
  opacity: 0;
  animation: particleFloat linear infinite;
}
@keyframes particleFloat {
  0% { opacity: 0; transform: translateY(0) scale(0); }
  10% { opacity: 0.6; transform: translateY(-20px) scale(1); }
  90% { opacity: 0.2; transform: translateY(-120px) scale(0.6); }
  100% { opacity: 0; transform: translateY(-140px) scale(0); }
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 28px;
  width: 100%;
  padding-top: 40px;
  padding-bottom: 80px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(0,212,255,0.07);
  border: 1px solid rgba(0,212,255,0.2);
  border-radius: 99px;
  padding: 5px 14px 5px 10px;
  font-size: 0.78rem;
  color: var(--c-accent);
  letter-spacing: 0.08em;
  font-weight: 500;
  margin-bottom: 28px;
  animation: fadeSlideUp 0.7s var(--ease-out) both;
}
.badge-dot {
  width: 6px; height: 6px;
  background: var(--c-accent);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--c-accent);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.7); }
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 7vw, 5.5rem);
  line-height: 1.12;
  color: var(--c-text-bright);
  letter-spacing: 0.03em;
  margin-bottom: 24px;
}
.title-line { display: block; animation: fadeSlideUp 0.7s var(--ease-out) 0.15s both; }
.title-line.accent {
  background: linear-gradient(135deg, var(--c-accent) 0%, #60a5fa 60%, #a78bfa 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation-delay: 0.3s;
}
.hero-desc {
  font-size: clamp(1rem, 2vw, 1.15rem);
  color: var(--c-text-dim);
  line-height: 1.8;
  max-width: 560px;
  margin-bottom: 40px;
  animation: fadeSlideUp 0.7s var(--ease-out) 0.45s both;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  animation: fadeSlideUp 0.7s var(--ease-out) 0.6s both;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(135deg, var(--c-accent), #0099cc);
  color: #03080f;
  font-weight: 700;
  font-size: 0.9rem;
  padding: 12px 26px;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: transform 0.25s var(--ease-spring), box-shadow 0.25s;
  letter-spacing: 0.02em;
  box-shadow: 0 4px 20px rgba(0,212,255,0.3);
}
.btn-primary:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 8px 30px rgba(0,212,255,0.45);
}
.btn-primary .arrow { transition: transform 0.25s; }
.btn-primary:hover .arrow { transform: translateX(4px); }

.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  color: var(--c-text);
  font-size: 0.9rem;
  padding: 11px 26px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--c-border2);
  cursor: pointer;
  transition: all 0.25s var(--ease-smooth);
  letter-spacing: 0.02em;
  font-weight: 400;
}
.btn-outline:hover {
  border-color: var(--c-accent);
  color: var(--c-accent);
  background: var(--c-accent-glow);
}

/* Hero Graphic */
.hero-graphic {
  position: absolute;
  right: -80px;
  top: 50%;
  transform: translateY(-50%);
  width: 560px;
  height: 560px;
  pointer-events: none;
  z-index: 1;
}
.hex-grid {
  position: absolute;
  inset: 0;
}
.hex {
  position: absolute;
  width: 120px; height: 120px;
  border-radius: 22px;
  background: rgba(0,212,255,0.04);
  border: 1px solid rgba(0,212,255,0.1);
  animation: hexFloat ease-in-out infinite;
}
.hex-1 { top: 50%; left: 50%; transform: translate(-50%,-50%) rotate(15deg); animation-duration: 4s; }
.hex-2 { top: 8%; right: 22%; animation-duration: 5.5s; animation-delay: 1s; background: rgba(124,58,237,0.05); border-color: rgba(124,58,237,0.12); }
.hex-3 { bottom: 15%; left: 10%; animation-duration: 4.8s; animation-delay: 0.5s; }
.hex-4 { bottom: 30%; right: 8%; width: 80px; height: 80px; animation-duration: 6s; background: rgba(96,165,250,0.04); border-color: rgba(96,165,250,0.1); }
.hex-5 { top: 30%; left: 5%; width: 70px; height: 70px; animation-duration: 5s; animation-delay: 2s; background: rgba(0,212,255,0.06); }

@keyframes hexFloat {
  0%, 100% { transform: translateY(0) rotate(15deg); }
  50% { transform: translateY(-12px) rotate(15deg); }
}

.orbit-ring {
  position: absolute;
  border-radius: 50%;
  border: 1px solid rgba(0,212,255,0.08);
  top: 50%; left: 50%;
  transform: translate(-50%,-50%);
}
.ring-1 { width: 300px; height: 300px; animation: ringPulse 6s ease-in-out infinite; }
.ring-2 { width: 440px; height: 440px; animation: ringPulse 6s ease-in-out 1.5s infinite; }
@keyframes ringPulse {
  0%, 100% { opacity: 0.3; transform: translate(-50%,-50%) scale(1); }
  50% { opacity: 0.08; transform: translate(-50%,-50%) scale(1.04); }
}
.core-dot {
  position: absolute;
  top: 50%; left: 50%;
  width: 16px; height: 16px;
  background: var(--c-accent);
  border-radius: 50%;
  transform: translate(-50%,-50%);
  box-shadow: 0 0 20px var(--c-accent), 0 0 50px rgba(0,212,255,0.3);
  animation: corePulse 3s ease-in-out infinite;
}
@keyframes corePulse {
  0%, 100% { box-shadow: 0 0 20px var(--c-accent), 0 0 50px rgba(0,212,255,0.3); }
  50% { box-shadow: 0 0 35px var(--c-accent), 0 0 80px rgba(0,212,255,0.5); }
}

.hero-scroll-hint {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  z-index: 2;
  animation: fadeSlideUp 1s var(--ease-out) 1s both;
}
.hero-scroll-hint span {
  font-size: 0.72rem;
  color: var(--c-text-dim);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--c-accent), transparent);
  animation: scrollDown 1.8s ease-in-out infinite;
}
@keyframes scrollDown {
  0% { opacity: 0; transform: scaleY(0); transform-origin: top; }
  50% { opacity: 1; transform: scaleY(1); }
  100% { opacity: 0; transform: scaleY(1) translateY(10px); }
}

/* ============================================================
   ABOUT
   ============================================================ */
.about {
  padding: var(--section-py) 0;
  background: var(--c-bg);
  position: relative;
}
.about::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--c-border2), transparent);
}
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
  margin-top: 20px;
}
.about-para {
  color: var(--c-text-dim);
  font-size: 1.02rem;
  line-height: 1.9;
  margin-bottom: 20px;
}
.about-stats {
  display: flex;
  gap: 36px;
  margin-top: 44px;
  padding-top: 36px;
  border-top: 1px solid var(--c-border);
}
.stat-item { text-align: center; }
.stat-num {
  font-family: var(--font-display);
  font-size: 2.6rem;
  color: var(--c-accent);
  line-height: 1;
  display: inline-block;
}
.stat-unit {
  font-family: var(--font-display);
  font-size: 1.4rem;
  color: var(--c-accent);
  opacity: 0.6;
}
.stat-label {
  display: block;
  font-size: 0.78rem;
  color: var(--c-text-dim);
  letter-spacing: 0.08em;
  margin-top: 4px;
  text-transform: uppercase;
}

.about-visual {
  position: relative;
  height: 360px;
}
.visual-card {
  position: absolute;
  background: var(--c-card-bg);
  border: 1px solid var(--c-border2);
  border-radius: var(--radius);
  padding: 22px;
  width: 200px;
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-card);
  transition: transform 0.35s var(--ease-spring), box-shadow 0.35s;
}
.visual-card:hover {
  transform: translateY(-6px) scale(1.04);
  box-shadow: var(--shadow-glow), var(--shadow-card);
}
.card-1 { top: 0; left: 10px; animation: floatA 5s ease-in-out 0s infinite; }
.card-2 { top: 40px; right: 10px; animation: floatA 5s ease-in-out 1.2s infinite; }
.card-3 { bottom: 20px; left: 30px; animation: floatA 5s ease-in-out 2.4s infinite; }
.card-4 { bottom: 0; right: 20px; animation: floatA 5s ease-in-out 3.6s infinite; }
@keyframes floatA {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}
.vc-icon { font-size: 1.6rem; margin-bottom: 8px; }
.vc-title { font-size: 0.95rem; font-weight: 600; color: var(--c-text-bright); margin-bottom: 4px; }
.vc-desc { font-size: 0.78rem; color: var(--c-text-dim); line-height: 1.5; }

/* ============================================================
   SERVICES
   ============================================================ */
.services {
  padding: var(--section-py) 0;
  background: linear-gradient(180deg, var(--c-bg) 0%, var(--c-surface) 50%, var(--c-bg) 100%);
  position: relative;
}
.services::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--c-border2), transparent);
}
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.service-card {
  background: var(--c-card-bg);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  position: relative;
  overflow: hidden;
  transition: transform 0.35s var(--ease-spring), border-color 0.35s, box-shadow 0.35s;
  backdrop-filter: blur(8px);
}
.service-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 60% 50% at 50% 0%, rgba(0,212,255,0.06), transparent);
  pointer-events: none;
  transition: opacity 0.3s;
  opacity: 0;
}
.service-card:hover {
  transform: translateY(-5px);
  border-color: rgba(0,212,255,0.25);
  box-shadow: var(--shadow-glow);
}
.service-card:hover::before { opacity: 1; }
.sc-icon { font-size: 2.2rem; margin-bottom: 14px; display: block; }
.sc-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--c-text-bright);
  margin-bottom: 10px;
  letter-spacing: 0.01em;
}
.sc-desc { font-size: 0.88rem; color: var(--c-text-dim); line-height: 1.75; margin-bottom: 20px; }
.sc-bar {
  height: 3px;
  background: rgba(255,255,255,0.06);
  border-radius: 99px;
  overflow: hidden;
  margin-bottom: 12px;
}
.sc-bar-fill {
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--c-accent), #60a5fa);
  border-radius: 99px;
  transition: width 1.2s var(--ease-out) 0.5s;
}
.service-card.in-view .sc-bar-fill { width: var(--w); }
.sc-tag {
  display: inline-block;
  background: var(--c-tag-bg);
  color: var(--c-tag-text);
  font-size: 0.72rem;
  padding: 3px 10px;
  border-radius: 99px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 600;
}

/* ============================================================
   CASES
   ============================================================ */
.cases {
  padding: var(--section-py) 0;
  background: var(--c-bg);
  position: relative;
}
.cases::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--c-border2), transparent);
}
.cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: auto auto;
  gap: 20px;
  margin-top: 50px;
}
.case-card {
  background: var(--c-card-bg);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform 0.35s var(--ease-spring), box-shadow 0.35s, border-color 0.35s;
}
.case-card:hover {
  transform: translateY(-6px);
  border-color: rgba(0,212,255,0.2);
  box-shadow: var(--shadow-glow);
}
.case-card.tall { grid-row: span 2; }
.case-card.wide { grid-column: span 2; }
.cc-img {
  height: 180px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3.5rem;
  position: relative;
  overflow: hidden;
}
.case-card.tall .cc-img { height: 260px; }
.cc-img::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.25);
}
.cc-emoji { position: relative; z-index: 1; filter: drop-shadow(0 4px 12px rgba(0,0,0,0.4)); }
.cc-body { padding: 20px 22px; }
.cc-cat {
  display: inline-block;
  font-size: 0.72rem;
  color: var(--c-tag-text);
  background: var(--c-tag-bg);
  padding: 2px 10px;
  border-radius: 99px;
  letter-spacing: 0.06em;
  font-weight: 600;
  text-transform: uppercase;
  margin-bottom: 8px;
}
.cc-body h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--c-text-bright);
  margin-bottom: 6px;
  line-height: 1.4;
}
.cc-body p { font-size: 0.84rem; color: var(--c-text-dim); line-height: 1.65; }
.cc-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 12px;
}
.cc-tags span {
  font-size: 0.7rem;
  padding: 2px 8px;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--c-border);
  border-radius: 4px;
  color: var(--c-text-dim);
  font-weight: 500;
}

/* ============================================================
   PROCESS
   ============================================================ */
.process {
  padding: var(--section-py) 0;
  background: linear-gradient(180deg, var(--c-bg) 0%, var(--c-surface) 50%, var(--c-bg) 100%);
  position: relative;
}
.process::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--c-border2), transparent);
}
.process-track {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 0;
  margin-top: 60px;
  position: relative;
}
.process-step {
  text-align: center;
  flex: 1;
  max-width: 220px;
  position: relative;
  z-index: 1;
}
.process-connector {
  flex-shrink: 0;
  width: 120px;
  padding-top: 40px;
  display: flex;
  align-items: center;
}
.pc-line {
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, rgba(0,212,255,0.3), rgba(124,58,237,0.3));
  position: relative;
}
.pc-line::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 0;
  width: 8px; height: 8px;
  background: var(--c-accent);
  border-radius: 50%;
  transform: translateY(-50%);
  box-shadow: 0 0 10px var(--c-accent);
  animation: pcDot 2s ease-in-out infinite;
}
@keyframes pcDot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}
.ps-num {
  font-family: var(--font-display);
  font-size: 3.2rem;
  color: rgba(0,212,255,0.08);
  line-height: 1;
  margin-bottom: 4px;
  letter-spacing: -0.02em;
}
.ps-icon { font-size: 2rem; margin-bottom: 12px; display: block; }
.process-step h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--c-text-bright);
  margin-bottom: 8px;
}
.process-step p { font-size: 0.84rem; color: var(--c-text-dim); line-height: 1.6; }

/* ============================================================
   CONTACT
   ============================================================ */
.contact {
  padding: var(--section-py) 0;
  background: var(--c-bg);
  position: relative;
  overflow: hidden;
}
.contact::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--c-border2), transparent);
}
.contact-bg-shapes { position: absolute; inset: 0; pointer-events: none; overflow: hidden; }
.cbs {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
}
.cbs-1 { width: 500px; height: 500px; background: rgba(0,212,255,0.05); top: -100px; right: -100px; }
.cbs-2 { width: 400px; height: 400px; background: rgba(124,58,237,0.05); bottom: -80px; left: -80px; }
.cbs-3 { width: 200px; height: 200px; background: rgba(0,212,255,0.04); top: 40%; left: 40%; }

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
  margin-top: 20px;
  position: relative;
  z-index: 1;
}
.contact-desc {
  color: var(--c-text-dim);
  font-size: 1rem;
  line-height: 1.85;
  margin: 20px 0 36px;
}
.contact-items { display: flex; flex-direction: column; gap: 20px; }
.ci-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
}
.ci-icon { font-size: 1.3rem; flex-shrink: 0; margin-top: 2px; }
.ci-label { font-size: 0.78rem; color: var(--c-text-dim); letter-spacing: 0.06em; text-transform: uppercase; margin-bottom: 2px; }
.ci-val { font-size: 0.95rem; color: var(--c-text-bright); font-weight: 400; }

.beian-block {
  margin-top: 36px;
  padding: 20px 24px;
  background: var(--c-card-bg);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  backdrop-filter: blur(8px);
}
.beian-label {
  font-size: 0.78rem;
  color: var(--c-text-dim);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 6px;
}
.beian-text { font-size: 0.88rem; }
.beian-text a {
  color: var(--c-tag-text);
  transition: opacity 0.2s;
}
.beian-text a:hover { opacity: 0.7; }

/* Contact Form */
.contact-form { }
.cf-card {
  background: var(--c-card-bg);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-card);
}
.cf-title {
  font-family: var(--font-display);
  font-size: 1.3rem;
  color: var(--c-text-bright);
  margin-bottom: 28px;
  letter-spacing: 0.04em;
}
.form-group { margin-bottom: 18px; }
.form-group label {
  display: block;
  font-size: 0.82rem;
  color: var(--c-text-dim);
  margin-bottom: 6px;
  letter-spacing: 0.04em;
}
.form-group input,
.form-group textarea {
  width: 100%;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--c-border2);
  border-radius: var(--radius-sm);
  padding: 11px 14px;
  font-family: var(--font-body);
  font-size: 0.92rem;
  color: var(--c-text-bright);
  outline: none;
  transition: border-color 0.25s, box-shadow 0.25s, background 0.25s;
  resize: vertical;
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--c-text-dim); opacity: 0.6; }
.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--c-accent);
  background: rgba(0,212,255,0.03);
  box-shadow: 0 0 0 3px rgba(0,212,255,0.1);
}
.field-error { font-size: 0.78rem; color: #f87171; display: block; min-height: 16px; margin-top: 4px; }

.btn-submit {
  width: 100%;
  padding: 13px;
  background: linear-gradient(135deg, var(--c-accent), #0099cc);
  color: #03080f;
  font-weight: 700;
  font-size: 0.92rem;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  letter-spacing: 0.04em;
  transition: transform 0.25s var(--ease-spring), box-shadow 0.25s, opacity 0.25s;
  box-shadow: 0 4px 20px rgba(0,212,255,0.25);
  margin-top: 6px;
}
.btn-submit:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0,212,255,0.4);
}
.btn-submit:disabled { opacity: 0.6; cursor: not-allowed; transform: none; }
.form-note {
  font-size: 0.78rem;
  color: var(--c-text-dim);
  text-align: center;
  margin-top: 10px;
  letter-spacing: 0.02em;
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  padding: 40px 0;
  border-top: 1px solid var(--c-border);
  background: var(--c-surface);
}
.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  text-align: center;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
}
.footer-logo {
  width: 28px; height: 28px;
  background: linear-gradient(135deg, var(--c-accent), var(--c-accent2));
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 0.9rem;
  color: #fff;
  font-weight: 700;
}
.footer-name {
  font-family: var(--font-display);
  font-size: 0.95rem;
  color: var(--c-text-bright);
  letter-spacing: 0.06em;
}
.footer-copy { font-size: 0.82rem; color: var(--c-text-dim); }
.footer-beian { font-size: 0.8rem; color: var(--c-text-dim); }
.footer-beian a { color: var(--c-tag-text); transition: opacity 0.2s; }
.footer-beian a:hover { opacity: 0.7; }

/* ============================================================
   ANIMATIONS (Intersection Observer driven)
   ============================================================ */
@keyframes fadeSlideUp {
  from { opacity: 0; transform: translateY(28px); }
  to { opacity: 1; transform: translateY(0); }
}

.fade-in {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}
.fade-in.in-view {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
  .hero-graphic { display: none; }
  .about-grid { grid-template-columns: 1fr; gap: 50px; }
  .about-visual { height: auto; display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
  .about-visual .visual-card { position: static; width: 100%; }
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .cases-grid { grid-template-columns: repeat(2, 1fr); }
  .case-card.tall { grid-row: span 1; }
  .case-card.wide { grid-column: span 1; }
  .contact-grid { grid-template-columns: 1fr; gap: 50px; }
}

@media (max-width: 768px) {
  :root { --section-py: 80px; }
  .nav-links {
    display: none;
    position: fixed;
    top: 68px; left: 0; right: 0;
    background: rgba(8,12,20,0.96);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 20px 28px;
    gap: 8px;
    border-bottom: 1px solid var(--c-border);
  }
  .nav-links.open { display: flex; }
  .nav-toggle { display: flex; }
  .nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-toggle.open span:nth-child(2) { opacity: 0; }
  .nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  .hero-content { padding-top: 20px; }
  .about-stats { gap: 20px; }
  .services-grid { grid-template-columns: 1fr; }
  .cases-grid { grid-template-columns: 1fr; }
  .process-track { flex-direction: column; align-items: center; gap: 0; }
  .process-connector { width: 1px; height: 40px; padding: 0; }
  .pc-line { height: 100%; width: 1px; background: linear-gradient(180deg, rgba(0,212,255,0.3), rgba(124,58,237,0.3)); }
  .pc-line::after { top: 0; left: 50%; transform: translate(-50%, -50%); }
  .cf-card { padding: 24px 20px; }
}

@media (max-width: 480px) {
  .hero-title { font-size: 2.4rem; }
  .about-stats { flex-direction: column; gap: 20px; }
  .about-visual { grid-template-columns: 1fr; }
}