/* ===========================================================
   格地 BIM  ·  科技蓝 + 金色  ·  GEDIBIM
   =========================================================== */

/* ----------  设计令牌  ---------- */
:root {
  /* 主色：科技蓝 */
  --c-blue-50:  #e6f7ff;
  --c-blue-100: #b8e2ff;
  --c-blue-300: #5fb6ff;
  --c-blue-500: #2196f3;
  --c-blue-600: #0e8de9;
  --c-blue-700: #0a6dc7;
  --c-blue-900: #0a2540;
  --c-blue-950: #061a30;
  --c-ink:      #0a2540;

  /* 辅色：金色 */
  --c-gold-300: #f4d27a;
  --c-gold-400: #ecc25e;
  --c-gold-500: #d4af37;
  --c-gold-600: #b08d2a;
  --c-gold-700: #8a6d20;

  /* 中性 */
  --c-white:   #ffffff;
  --c-gray-50: #f5f8fc;
  --c-gray-100:#eaf0f7;
  --c-gray-200:#d4deeb;
  --c-gray-400:#8a9bb5;
  --c-gray-600:#516683;

  /* 渐变 */
  --grad-blue:    linear-gradient(135deg, #061a30 0%, #0a2540 50%, #0e5fa3 100%);
  --grad-blue-2:  linear-gradient(135deg, #0a2540 0%, #134c8a 100%);
  --grad-gold:    linear-gradient(135deg, #d4af37 0%, #f4d27a 50%, #d4af37 100%);
  --grad-mix:     linear-gradient(135deg, #00d4ff 0%, #0a2540 100%);
  --grad-card:    linear-gradient(135deg, rgba(10,37,64,.85) 0%, rgba(14,93,163,.7) 100%);

  /* 字体 */
  --f-sans: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --f-tech: 'Orbitron', 'Inter', sans-serif;

  /* 间距 */
  --sp-1: 4px; --sp-2: 8px; --sp-3: 12px; --sp-4: 16px;
  --sp-6: 24px; --sp-8: 32px; --sp-12: 48px; --sp-16: 64px;
  --sp-20: 80px; --sp-24: 96px; --sp-32: 128px;

  /* 圆角与阴影 */
  --r-sm: 6px; --r-md: 12px; --r-lg: 20px; --r-xl: 28px;
  --shadow-blue: 0 10px 40px -10px rgba(14, 93, 163, .35);
  --shadow-gold: 0 10px 30px -8px rgba(212, 175, 55, .35);
  --shadow-card: 0 12px 48px -12px rgba(10, 37, 64, .25);
  --shadow-deep: 0 24px 64px -16px rgba(6, 26, 48, .55);

  /* 容器 */
  --container: 1240px;

  /* 缓动 */
  --ease: cubic-bezier(.22, 1, .36, 1);
}

/* ----------  重置  ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--f-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--c-ink);
  background: var(--c-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: color .2s var(--ease); }
button { font: inherit; border: 0; background: transparent; padding: 0; cursor: pointer; color: inherit; }
ul { list-style: none; padding: 0; margin: 0; }
h1, h2, h3, h4 { margin: 0; font-weight: 700; letter-spacing: -0.01em; }
p { margin: 0 0 var(--sp-4); }
strong { font-weight: 600; color: var(--c-ink); }
sup { font-size: .55em; vertical-align: super; font-weight: 700; }

/* ----------  容器  ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--sp-6);
}

/* ----------  滚动进度条  ---------- */
.scroll-progress {
  position: fixed; top: 0; left: 0;
  width: 0%; height: 2px;
  background: var(--grad-gold);
  box-shadow: 0 0 10px rgba(212,175,55,.6);
  z-index: 200;
  transition: width .1s linear;
}

/* ===========================================================
   导航
   =========================================================== */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 14px 0;
  background: rgba(6, 26, 48, .45);
  backdrop-filter: blur(18px) saturate(180%);
  -webkit-backdrop-filter: blur(18px) saturate(180%);
  border-bottom: 1px solid rgba(212, 175, 55, .12);
  transition: padding .3s var(--ease), background .3s var(--ease);
}
.nav.scrolled {
  padding: 8px 0;
  background: rgba(6, 26, 48, .85);
  box-shadow: 0 6px 30px -10px rgba(0,0,0,.4);
}
.nav-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--sp-6);
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--sp-6);
}
.nav-logo { display: flex; align-items: center; gap: 12px; }
.logo-mark { display: inline-flex; }
.logo-text { display: flex; flex-direction: column; line-height: 1.05; }
.logo-name { font-size: 18px; font-weight: 800; color: var(--c-white); letter-spacing: .5px; }
.logo-en   { font-family: var(--f-tech); font-size: 11px; font-weight: 500; color: var(--c-gold-400); letter-spacing: 2.5px; margin-top: 2px; }

.nav-menu {
  display: flex; align-items: center; gap: 4px;
  font-size: 14px;
}
.nav-menu a {
  position: relative;
  padding: 8px 14px;
  color: rgba(255,255,255,.78);
  font-weight: 500;
  border-radius: var(--r-sm);
  transition: color .2s var(--ease), background .2s var(--ease);
}
.nav-menu a:hover { color: var(--c-gold-300); }
.nav-menu a.active { color: var(--c-gold-400); }
.nav-menu a.active::after {
  content: '';
  position: absolute;
  left: 50%; bottom: 0;
  width: 18px; height: 2px;
  background: var(--c-gold-500);
  border-radius: 1px;
  transform: translateX(-50%);
  box-shadow: 0 0 8px var(--c-gold-500);
}
.nav-cta-line {
  display: block;
  width: 1px; height: 18px;
  background: rgba(255,255,255,.18);
  margin: 0 4px;
}

.nav-toggle {
  display: none;
  width: 40px; height: 40px;
  flex-direction: column; justify-content: center; align-items: center;
  gap: 5px;
}
.nav-toggle span {
  display: block;
  width: 22px; height: 2px;
  background: var(--c-white);
  border-radius: 1px;
  transition: transform .3s var(--ease), opacity .2s var(--ease);
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 960px) {
  .nav-toggle { display: flex; }
  .nav-menu {
    position: fixed; top: 64px; left: 0; right: 0;
    flex-direction: column;
    background: rgba(6, 26, 48, .96);
    backdrop-filter: blur(20px);
    padding: var(--sp-6);
    border-bottom: 1px solid rgba(212,175,55,.15);
    transform: translateY(-12px);
    opacity: 0; pointer-events: none;
    transition: transform .3s var(--ease), opacity .3s var(--ease);
  }
  .nav-menu.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .nav-menu a { padding: 12px 16px; width: 100%; }
  .nav-cta-line { display: none; }
}

/* ===========================================================
   Hero
   =========================================================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  padding: 120px 0 80px;
  background: var(--grad-blue);
  overflow: hidden;
  isolation: isolate;
}
.hero-canvas {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  z-index: 0;
}
.hero-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(0, 212, 255, .07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 212, 255, .07) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, black 0%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 0%, transparent 70%);
  z-index: 1;
  pointer-events: none;
}
.hero-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: .55;
  z-index: 1;
  pointer-events: none;
  animation: float 12s ease-in-out infinite;
}
.hero-glow-a {
  width: 480px; height: 480px;
  top: -120px; left: -80px;
  background: radial-gradient(circle, #00d4ff 0%, transparent 70%);
}
.hero-glow-b {
  width: 520px; height: 520px;
  bottom: -150px; right: -100px;
  background: radial-gradient(circle, #2196f3 0%, transparent 70%);
  animation-delay: -4s;
}
.hero-glow-c {
  width: 360px; height: 360px;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, #d4af37 0%, transparent 70%);
  opacity: .15;
  animation-delay: -8s;
}
@keyframes float {
  0%,100% { transform: translate(0, 0) scale(1); }
  50%     { transform: translate(40px, -30px) scale(1.05); }
}
.hero-glow-c { animation: float 16s ease-in-out infinite; }
.hero-glow-c { animation-name: floatCenter; }
@keyframes floatCenter {
  0%,100% { transform: translate(-50%, -50%) scale(1); opacity: .15; }
  50%     { transform: translate(-50%, -50%) scale(1.1); opacity: .22; }
}

.hero-inner {
  position: relative;
  z-index: 2;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--sp-6);
  text-align: center;
  color: var(--c-white);
}
.hero-eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 13px; font-weight: 500;
  letter-spacing: 2px;
  color: var(--c-gold-400);
  text-transform: uppercase;
  padding: 8px 18px;
  border: 1px solid rgba(212, 175, 55, .3);
  border-radius: 999px;
  background: rgba(212, 175, 55, .06);
  backdrop-filter: blur(8px);
  margin-bottom: var(--sp-8);
  font-family: var(--f-tech);
}
.hero-eyebrow .dot {
  width: 6px; height: 6px;
  background: var(--c-gold-500);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--c-gold-500);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%,100% { transform: scale(1); opacity: 1; }
  50%     { transform: scale(1.3); opacity: .7; }
}

.hero-title {
  display: flex;
  align-items: baseline;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--sp-4);
  font-size: clamp(56px, 9vw, 130px);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin: 0 0 var(--sp-4);
  text-shadow: 0 4px 30px rgba(0, 212, 255, .25);
}
.hero-line {
  background: linear-gradient(180deg, #ffffff 0%, #b8e2ff 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-accent {
  background: var(--grad-gold);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  position: relative;
  filter: drop-shadow(0 0 24px rgba(212, 175, 55, .45));
}

.hero-subtitle {
  font-size: clamp(18px, 2.4vw, 28px);
  font-weight: 500;
  letter-spacing: 6px;
  color: rgba(255, 255, 255, .85);
  margin: 0 0 var(--sp-6);
}
.hero-desc {
  font-size: clamp(14px, 1.6vw, 17px);
  color: rgba(255, 255, 255, .65);
  max-width: 760px;
  margin: 0 auto var(--sp-8);
  line-height: 1.9;
}

.hero-meta {
  display: flex; flex-wrap: wrap;
  align-items: center; justify-content: center;
  gap: var(--sp-4) var(--sp-8);
  margin: 0 auto var(--sp-10);
  padding: var(--sp-6) var(--sp-8);
  max-width: 920px;
  background: rgba(255, 255, 255, .03);
  border: 1px solid rgba(255, 255, 255, .08);
  border-radius: var(--r-lg);
  backdrop-filter: blur(12px);
}
.hero-meta-item { display: flex; flex-direction: column; align-items: center; }
.hero-meta-num {
  font-family: var(--f-tech);
  font-size: clamp(24px, 3vw, 36px);
  font-weight: 700;
  background: var(--grad-gold);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}
.hero-meta-label {
  font-size: 12px;
  color: rgba(255, 255, 255, .55);
  margin-top: 6px;
  letter-spacing: 1px;
}
.hero-meta-divider {
  width: 1px; height: 30px;
  background: linear-gradient(180deg, transparent, rgba(212,175,55,.3), transparent);
}

.hero-cta {
  display: flex; flex-wrap: wrap;
  justify-content: center;
  gap: var(--sp-4);
}

/* ----------  通用按钮  ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 28px;
  font-size: 15px; font-weight: 600;
  border-radius: 999px;
  transition: transform .25s var(--ease), box-shadow .25s var(--ease), background .25s var(--ease);
  position: relative;
  overflow: hidden;
}
.btn-primary {
  background: var(--grad-gold);
  color: var(--c-blue-950);
  box-shadow: 0 8px 24px -6px rgba(212, 175, 55, .5);
}
.btn-primary::before {
  content: '';
  position: absolute;
  top: 0; left: -100%;
  width: 100%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,.5), transparent);
  transition: left .6s var(--ease);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 32px -6px rgba(212, 175, 55, .7); }
.btn-primary:hover::before { left: 100%; }

.btn-ghost {
  background: rgba(255, 255, 255, .05);
  color: var(--c-white);
  border: 1px solid rgba(255, 255, 255, .25);
  backdrop-filter: blur(8px);
}
.btn-ghost:hover { background: rgba(255, 255, 255, .12); border-color: var(--c-gold-400); color: var(--c-gold-300); transform: translateY(-2px); }

/* ----------  Hero scroll  ---------- */
.hero-scroll {
  position: absolute;
  left: 50%; bottom: 24px;
  transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  color: rgba(255, 255, 255, .5);
  font-family: var(--f-tech);
  font-size: 10px;
  letter-spacing: 3px;
  z-index: 3;
}
.hero-scroll-line {
  width: 1px; height: 50px;
  background: linear-gradient(180deg, var(--c-gold-500), transparent);
  position: relative;
  overflow: hidden;
}
.hero-scroll-line::after {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 30%;
  background: var(--c-white);
  animation: scrollDown 2s ease-in-out infinite;
}
@keyframes scrollDown {
  0%   { top: -30%; }
  100% { top: 100%; }
}

/* ===========================================================
   数据条
   =========================================================== */
.stats {
  position: relative;
  background: var(--c-white);
  padding: var(--sp-16) 0;
  border-top: 1px solid var(--c-gray-100);
  border-bottom: 1px solid var(--c-gray-100);
  z-index: 5;
}
.stats::before, .stats::after {
  content: '';
  position: absolute;
  left: 50%;
  width: 60%; height: 1px;
  background: linear-gradient(90deg, transparent, var(--c-gold-500), transparent);
  transform: translateX(-50%);
}
.stats::before { top: 0; }
.stats::after  { bottom: 0; }

.stats-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--sp-6);
}
.stat {
  text-align: center;
  padding: var(--sp-6) var(--sp-4);
  position: relative;
}
.stat::after {
  content: '';
  position: absolute;
  right: 0; top: 30%; height: 40%;
  width: 1px;
  background: linear-gradient(180deg, transparent, var(--c-gray-200), transparent);
}
.stat:last-child::after { display: none; }
.stat-num {
  font-family: var(--f-tech);
  font-size: clamp(32px, 4vw, 48px);
  font-weight: 700;
  color: var(--c-blue-900);
  line-height: 1;
  display: inline-flex; align-items: baseline;
  gap: 2px;
}
.stat-num .unit {
  font-size: .55em;
  color: var(--c-gold-500);
  font-weight: 700;
  margin-left: 2px;
}
.stat-label {
  margin-top: var(--sp-3);
  font-size: 13px;
  color: var(--c-gray-600);
  letter-spacing: 1px;
}
.stat-bar {
  width: 40px; height: 2px;
  margin: var(--sp-4) auto 0;
  background: var(--c-gray-100);
  border-radius: 1px;
  overflow: hidden;
}
.stat-bar span {
  display: block;
  width: 0%; height: 100%;
  background: var(--grad-gold);
  transition: width 1.2s var(--ease);
}
.stat.in-view .stat-bar span { width: 100%; }
@media (max-width: 900px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat::after { display: none; }
}

/* ===========================================================
   通用 Section
   =========================================================== */
.section {
  padding: var(--sp-24) 0;
  position: relative;
}
.section-alt {
  background: var(--c-gray-50);
  background-image:
    radial-gradient(circle at 20% 30%, rgba(14, 93, 163, .04) 0%, transparent 40%),
    radial-gradient(circle at 80% 70%, rgba(212, 175, 55, .04) 0%, transparent 40%);
}

.section-eyebrow {
  font-family: var(--f-tech);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 3px;
  color: var(--c-blue-600);
  text-transform: uppercase;
  margin: 0 0 var(--sp-3);
}
.section-alt .section-eyebrow { color: var(--c-gold-600); }
.philosophy { background: var(--c-blue-950); color: var(--c-white); }
.philosophy .section-eyebrow { color: var(--c-gold-400); }
.philosophy .section-title { color: var(--c-white); }
.philosophy .title-accent { color: var(--c-gold-400); }

.section-title {
  font-size: clamp(28px, 4vw, 48px);
  line-height: 1.2;
  margin: 0 0 var(--sp-4);
  color: var(--c-blue-900);
  font-weight: 800;
  letter-spacing: -0.02em;
}
.title-accent {
  color: var(--c-blue-600);
  background: linear-gradient(135deg, #0a6dc7 0%, #00d4ff 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.section-lede {
  font-size: 16px;
  color: var(--c-gray-600);
  max-width: 720px;
  margin: 0;
}
.section-head {
  text-align: center;
  margin-bottom: var(--sp-16);
}
.section-head .section-lede { margin: 0 auto; }
.philosophy .section-lede { color: rgba(255,255,255,.65); margin: 0 auto; }

@media (max-width: 720px) {
  .section { padding: var(--sp-16) 0; }
}

/* ===========================================================
   关于
   =========================================================== */
.about-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: var(--sp-16);
  align-items: start;
}
.about-text .section-eyebrow { color: var(--c-blue-600); }
.about-text .section-title { color: var(--c-blue-900); }
.about-text p {
  font-size: 15px;
  color: var(--c-gray-600);
  line-height: 1.9;
}
.about-text p strong { color: var(--c-blue-900); }

.about-timeline {
  position: relative;
  padding-left: var(--sp-8);
}
.about-timeline::before {
  content: '';
  position: absolute;
  left: 12px; top: 0; bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--c-blue-600) 0%, var(--c-gold-500) 100%);
}
.tl-item {
  position: relative;
  padding: 0 0 var(--sp-8) var(--sp-8);
}
.tl-item::before {
  content: '';
  position: absolute;
  left: -6px; top: 4px;
  width: 14px; height: 14px;
  background: var(--c-white);
  border: 3px solid var(--c-blue-600);
  border-radius: 50%;
  box-shadow: 0 0 0 4px rgba(14, 109, 199, .15);
  z-index: 1;
}
.tl-item:nth-child(odd)::before { border-color: var(--c-gold-500); box-shadow: 0 0 0 4px rgba(212, 175, 55, .15); }
.tl-year {
  font-family: var(--f-tech);
  font-size: 22px;
  font-weight: 700;
  color: var(--c-blue-900);
  line-height: 1;
  margin-bottom: 6px;
}
.tl-item:nth-child(odd) .tl-year { color: var(--c-gold-600); }
.tl-text h4 {
  font-size: 16px;
  color: var(--c-blue-900);
  margin-bottom: 4px;
}
.tl-text p {
  font-size: 14px;
  color: var(--c-gray-600);
  margin: 0;
  line-height: 1.7;
}

@media (max-width: 880px) {
  .about-grid { grid-template-columns: 1fr; gap: var(--sp-12); }
}

/* ===========================================================
   业务领域
   =========================================================== */
.services-main {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-6);
  margin-bottom: var(--sp-16);
}
.svc-feature {
  position: relative;
  padding: var(--sp-12) var(--sp-8);
  background: var(--c-white);
  border: 1px solid var(--c-gray-200);
  border-radius: var(--r-lg);
  overflow: hidden;
  transition: transform .35s var(--ease), box-shadow .35s var(--ease), border-color .35s var(--ease);
}
.svc-feature:hover {
  transform: translateY(-6px);
  border-color: var(--c-gold-500);
  box-shadow: var(--shadow-blue), 0 0 0 1px rgba(212, 175, 55, .25);
}
.svc-glow {
  position: absolute;
  width: 220px; height: 220px;
  top: -110px; right: -110px;
  background: radial-gradient(circle, rgba(14, 93, 163, .18) 0%, transparent 70%);
  border-radius: 50%;
  transition: transform .5s var(--ease);
  z-index: 0;
}
.svc-feature:hover .svc-glow { transform: scale(1.5); }
.svc-feature > * { position: relative; z-index: 1; }

.svc-num {
  position: absolute;
  top: var(--sp-6); right: var(--sp-6);
  font-family: var(--f-tech);
  font-size: 64px;
  font-weight: 900;
  color: var(--c-gray-100);
  line-height: 1;
  z-index: 0;
}
.svc-tag {
  display: inline-block;
  font-family: var(--f-tech);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 2px;
  color: var(--c-gold-600);
  padding: 4px 10px;
  border: 1px solid var(--c-gold-500);
  border-radius: 4px;
  margin-bottom: var(--sp-6);
  background: rgba(212, 175, 55, .05);
}
.svc-name {
  font-size: 24px;
  color: var(--c-blue-900);
  margin-bottom: var(--sp-4);
}
.svc-desc {
  font-size: 14px;
  color: var(--c-gray-600);
  line-height: 1.8;
  margin-bottom: var(--sp-6);
}
.svc-desc strong { color: var(--c-blue-700); }
.svc-points {
  display: flex; flex-direction: column; gap: 8px;
  padding-top: var(--sp-4);
  border-top: 1px dashed var(--c-gray-200);
}
.svc-points li {
  position: relative;
  padding-left: 22px;
  font-size: 13px;
  color: var(--c-gray-600);
}
.svc-points li::before {
  content: '';
  position: absolute;
  left: 0; top: 9px;
  width: 12px; height: 2px;
  background: var(--c-gold-500);
}

@media (max-width: 960px) {
  .services-main { grid-template-columns: 1fr; }
}

.services-extra {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--sp-4);
}
.extra-card {
  padding: var(--sp-6);
  background: var(--c-white);
  border: 1px solid var(--c-gray-200);
  border-radius: var(--r-md);
  transition: transform .3s var(--ease), border-color .3s var(--ease), background .3s var(--ease);
}
.extra-card:hover {
  transform: translateY(-4px);
  border-color: var(--c-blue-600);
  background: linear-gradient(180deg, var(--c-white), var(--c-blue-50));
}
.extra-icon {
  width: 48px; height: 48px;
  display: flex; align-items: center; justify-content: center;
  color: var(--c-blue-600);
  background: rgba(14, 109, 199, .08);
  border-radius: 12px;
  margin-bottom: var(--sp-4);
}
.extra-card h4 {
  font-size: 16px;
  color: var(--c-blue-900);
  margin-bottom: 4px;
}
.extra-card p {
  font-size: 13px;
  color: var(--c-gray-600);
  margin: 0;
  line-height: 1.6;
}
@media (max-width: 720px) {
  .services-extra { grid-template-columns: repeat(2, 1fr); }
}

/* ===========================================================
   核心理念
   =========================================================== */
.philosophy {
  position: relative;
  overflow: hidden;
}
.philosophy::before {
  content: '';
  position: absolute; inset: 0;
  background:
    radial-gradient(circle at 15% 20%, rgba(0, 212, 255, .12) 0%, transparent 35%),
    radial-gradient(circle at 85% 80%, rgba(212, 175, 55, .08) 0%, transparent 35%);
  pointer-events: none;
}
.philo-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-6);
  position: relative;
  z-index: 1;
}
.philo-card {
  position: relative;
  padding: var(--sp-12) var(--sp-8);
  background: rgba(255, 255, 255, .04);
  border: 1px solid rgba(212, 175, 55, .2);
  border-radius: var(--r-lg);
  backdrop-filter: blur(10px);
  transition: transform .35s var(--ease), background .35s var(--ease), border-color .35s var(--ease);
}
.philo-card:hover {
  transform: translateY(-6px);
  background: rgba(255, 255, 255, .07);
  border-color: var(--c-gold-500);
}
.philo-num {
  position: absolute;
  top: var(--sp-6); right: var(--sp-6);
  font-family: var(--f-tech);
  font-size: 56px;
  font-weight: 900;
  color: rgba(212, 175, 55, .15);
  line-height: 1;
}
.philo-icon {
  width: 64px; height: 64px;
  display: flex; align-items: center; justify-content: center;
  color: var(--c-gold-400);
  background: rgba(212, 175, 55, .08);
  border: 1px solid rgba(212, 175, 55, .2);
  border-radius: 16px;
  margin-bottom: var(--sp-6);
}
.philo-card h3 {
  font-size: 22px;
  color: var(--c-white);
  margin-bottom: var(--sp-3);
}
.philo-card p {
  font-size: 14px;
  color: rgba(255, 255, 255, .65);
  line-height: 1.8;
  margin: 0;
}
@media (max-width: 880px) {
  .philo-grid { grid-template-columns: 1fr; }
}

/* ===========================================================
   技术能力
   =========================================================== */
.tech-section {
  background: var(--c-white);
}
.tech-categories {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--sp-8);
}
.tech-cat {
  padding: var(--sp-8);
  background: linear-gradient(135deg, var(--c-gray-50) 0%, var(--c-white) 100%);
  border: 1px solid var(--c-gray-100);
  border-radius: var(--r-lg);
  transition: border-color .3s var(--ease), transform .3s var(--ease);
}
.tech-cat:hover { border-color: var(--c-gold-500); transform: translateY(-4px); }
.tech-cat-title {
  font-size: 18px;
  color: var(--c-blue-900);
  margin-bottom: var(--sp-6);
  padding-bottom: var(--sp-3);
  border-bottom: 2px solid var(--c-gold-500);
  display: inline-block;
}
.tech-chips {
  display: flex; flex-wrap: wrap;
  gap: 10px;
}
.tech-chip {
  position: relative;
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 500;
  color: var(--c-blue-900);
  background: var(--c-white);
  border: 1px solid var(--c-gray-200);
  border-radius: 999px;
  cursor: default;
  transition: color .2s var(--ease), border-color .2s var(--ease), background .2s var(--ease), transform .2s var(--ease);
}
.tech-chip:hover {
  color: var(--c-gold-600);
  border-color: var(--c-gold-500);
  background: rgba(212, 175, 55, .08);
  transform: translateY(-2px);
}
.tech-chip:hover::after {
  content: attr(data-tip);
  position: absolute;
  bottom: calc(100% + 8px); left: 50%;
  transform: translateX(-50%);
  padding: 6px 12px;
  font-size: 12px;
  color: var(--c-white);
  background: var(--c-blue-900);
  border-radius: 6px;
  white-space: nowrap;
  pointer-events: none;
  z-index: 10;
  box-shadow: 0 4px 16px rgba(0,0,0,.2);
}
.tech-chip:hover::before {
  content: '';
  position: absolute;
  bottom: calc(100% + 2px); left: 50%;
  transform: translateX(-50%) rotate(45deg);
  width: 8px; height: 8px;
  background: var(--c-blue-900);
  z-index: 10;
}
@media (max-width: 720px) {
  .tech-categories { grid-template-columns: 1fr; }
}

/* ===========================================================
   团队
   =========================================================== */
.team-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--sp-6);
  margin-bottom: var(--sp-12);
}
.team-card {
  text-align: center;
  padding: var(--sp-8) var(--sp-4);
  background: var(--c-white);
  border: 1px solid var(--c-gray-200);
  border-radius: var(--r-lg);
  transition: transform .3s var(--ease), border-color .3s var(--ease), box-shadow .3s var(--ease);
}
.team-card:hover {
  transform: translateY(-6px);
  border-color: var(--c-gold-500);
  box-shadow: var(--shadow-blue);
}
.team-photo {
  width: 120px; height: 120px;
  margin: 0 auto var(--sp-4);
  position: relative;
  background: linear-gradient(135deg, var(--c-blue-700), var(--c-blue-900));
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
  border: 3px solid var(--c-gold-500);
  box-shadow: 0 6px 20px -6px rgba(14, 93, 163, .4);
}
.team-photo::before {
  content: '';
  position: absolute; inset: -3px;
  border-radius: 50%;
  background: conic-gradient(from 0deg, var(--c-blue-500), var(--c-gold-500), var(--c-blue-500));
  z-index: -1;
  animation: spin 6s linear infinite;
}
.team-photo::after {
  content: '';
  position: absolute; inset: 0;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--c-blue-700), var(--c-blue-900));
  z-index: -1;
}
@keyframes spin { to { transform: rotate(360deg); } }
.team-avatar {
  font-size: 48px;
  font-weight: 700;
  color: var(--c-gold-300);
  font-family: var(--f-tech);
}
.team-card h3 {
  font-size: 20px;
  color: var(--c-blue-900);
  margin-bottom: 4px;
}
.team-role {
  font-size: 12px;
  color: var(--c-gold-600);
  font-weight: 600;
  letter-spacing: 1px;
  margin: 0 0 var(--sp-3);
}
.team-bio {
  font-size: 13px;
  color: var(--c-gray-600);
  line-height: 1.7;
  margin: 0;
}
@media (max-width: 880px) {
  .team-grid { grid-template-columns: repeat(2, 1fr); }
}

.team-photo-wrap {
  position: relative;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--c-gray-200);
  max-width: 720px;
  margin: 0 auto;
}
.team-photo-wrap img {
  width: 100%;
  display: block;
}
.team-photo-caption {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  padding: var(--sp-4) var(--sp-6);
  font-size: 13px;
  color: var(--c-white);
  background: linear-gradient(0deg, rgba(6, 26, 48, .85), transparent);
}

/* ===========================================================
   业绩案例
   =========================================================== */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-6);
  margin-bottom: var(--sp-16);
}
.proj-card {
  position: relative;
  display: block;
  background: var(--c-blue-950);
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid rgba(255,255,255,.05);
  transition: transform .35s var(--ease), box-shadow .35s var(--ease);
  isolation: isolate;
}
.proj-large {
  grid-column: span 2;
  grid-row: span 1;
}
.proj-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 50px -16px rgba(0, 212, 255, .35);
}
.proj-media {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
}
.proj-card .proj-large .proj-media { aspect-ratio: 16 / 8; }
.proj-media img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform .6s var(--ease);
}
.proj-card:hover .proj-media img { transform: scale(1.06); }
.proj-media::after {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(6, 26, 48, .95) 100%);
  pointer-events: none;
}
.proj-body {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  padding: var(--sp-6) var(--sp-6) var(--sp-6);
  color: var(--c-white);
  z-index: 1;
}
.proj-cat {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 1.5px;
  color: var(--c-gold-400);
  padding: 3px 10px;
  background: rgba(212, 175, 55, .12);
  border: 1px solid rgba(212, 175, 55, .3);
  border-radius: 4px;
  margin: 0 0 var(--sp-3);
  font-family: var(--f-tech);
}
.proj-card h3 {
  font-size: 20px;
  color: var(--c-white);
  margin: 0 0 var(--sp-2);
  line-height: 1.3;
}
.proj-desc {
  font-size: 13px;
  color: rgba(255, 255, 255, .7);
  line-height: 1.7;
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.proj-shine {
  position: absolute;
  top: 0; left: -75%;
  width: 50%; height: 100%;
  background: linear-gradient(120deg, transparent, rgba(212, 175, 55, .15), transparent);
  transform: skewX(-25deg);
  transition: left .8s var(--ease);
  pointer-events: none;
}
.proj-card:hover .proj-shine { left: 125%; }

@media (max-width: 960px) {
  .projects-grid { grid-template-columns: repeat(2, 1fr); }
  .proj-large { grid-column: span 2; }
}
@media (max-width: 640px) {
  .projects-grid { grid-template-columns: 1fr; }
  .proj-large { grid-column: span 1; }
}

.other-works {
  padding: var(--sp-12);
  background: var(--c-white);
  border-radius: var(--r-lg);
  border: 1px solid var(--c-gray-200);
  position: relative;
  overflow: hidden;
}
.other-works::before {
  content: '';
  position: absolute; top: 0; left: 0;
  width: 4px; height: 100%;
  background: var(--grad-gold);
}
.other-works h3 {
  font-size: 22px;
  color: var(--c-blue-900);
  margin-bottom: var(--sp-8);
  display: flex; align-items: center; gap: 12px;
}
.other-works h3::before {
  content: '◆';
  color: var(--c-gold-500);
}
.other-cols {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--sp-6);
}
.other-cols h4 {
  font-size: 14px;
  color: var(--c-blue-700);
  margin-bottom: 8px;
  font-weight: 700;
  letter-spacing: 1px;
}
.other-cols p {
  font-size: 13px;
  color: var(--c-gray-600);
  line-height: 1.8;
  margin: 0;
}
@media (max-width: 720px) {
  .other-cols { grid-template-columns: 1fr; }
}

/* ===========================================================
   技术领先
   =========================================================== */
.leadership {
  background: var(--c-blue-950);
  color: var(--c-white);
  position: relative;
  overflow: hidden;
}
.leadership::before {
  content: '';
  position: absolute; inset: 0;
  background:
    radial-gradient(circle at 10% 20%, rgba(0, 212, 255, .12) 0%, transparent 40%),
    radial-gradient(circle at 90% 80%, rgba(212, 175, 55, .1) 0%, transparent 40%);
  pointer-events: none;
}
.leadership .section-eyebrow { color: var(--c-gold-400); }
.leadership .section-title { color: var(--c-white); }
.leadership .title-accent {
  background: var(--grad-gold);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.leadership-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-6);
  position: relative;
  z-index: 1;
}
.lead-card {
  position: relative;
  padding: var(--sp-12) var(--sp-8);
  background: rgba(255, 255, 255, .04);
  border: 1px solid rgba(0, 212, 255, .15);
  border-radius: var(--r-lg);
  backdrop-filter: blur(8px);
  overflow: hidden;
  transition: transform .35s var(--ease), border-color .35s var(--ease);
}
.lead-card:hover {
  transform: translateY(-6px);
  border-color: var(--c-gold-500);
}
.lead-glow {
  position: absolute;
  top: -120px; right: -120px;
  width: 240px; height: 240px;
  background: radial-gradient(circle, rgba(0, 212, 255, .25) 0%, transparent 70%);
  border-radius: 50%;
  transition: transform .6s var(--ease);
}
.lead-card:hover .lead-glow { transform: scale(1.5); }
.lead-num {
  font-family: var(--f-tech);
  font-size: 56px;
  font-weight: 900;
  color: rgba(0, 212, 255, .25);
  line-height: 1;
  margin-bottom: var(--sp-4);
}
.lead-card h3 {
  font-size: 24px;
  color: var(--c-white);
  margin-bottom: var(--sp-3);
  font-family: var(--f-tech);
  letter-spacing: 1px;
}
.lead-card p {
  font-size: 14px;
  color: rgba(255, 255, 255, .7);
  line-height: 1.8;
  margin-bottom: var(--sp-4);
}
.lead-points { display: flex; flex-direction: column; gap: 6px; }
.lead-points li {
  position: relative;
  padding-left: 20px;
  font-size: 13px;
  color: rgba(255, 255, 255, .55);
}
.lead-points li::before {
  content: '▸';
  position: absolute; left: 0;
  color: var(--c-gold-400);
}
@media (max-width: 880px) {
  .leadership-grid { grid-template-columns: 1fr; }
}

.vision {
  margin-top: var(--sp-16);
  text-align: center;
  position: relative;
  z-index: 1;
  padding: var(--sp-12);
  background: linear-gradient(135deg, rgba(212, 175, 55, .08), rgba(0, 212, 255, .05));
  border: 1px solid rgba(212, 175, 55, .25);
  border-radius: var(--r-lg);
  position: relative;
}
.vision-line {
  font-size: clamp(20px, 2.5vw, 28px);
  font-weight: 600;
  color: var(--c-gold-300);
  line-height: 1.6;
  max-width: 800px;
  margin: 0 auto var(--sp-3);
}
.vision-sub {
  font-size: 14px;
  color: rgba(255, 255, 255, .6);
  letter-spacing: 1px;
  margin: 0;
}

/* ===========================================================
   联系
   =========================================================== */
.contact-section { background: var(--c-white); }
.contact-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: var(--sp-12);
  align-items: stretch;
}
.contact-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--sp-4);
}
.contact-card {
  display: flex; align-items: flex-start; gap: var(--sp-4);
  padding: var(--sp-6);
  background: var(--c-white);
  border: 1px solid var(--c-gray-200);
  border-radius: var(--r-md);
  transition: transform .3s var(--ease), border-color .3s var(--ease), box-shadow .3s var(--ease);
}
a.contact-card:hover {
  transform: translateY(-4px);
  border-color: var(--c-blue-600);
  box-shadow: var(--shadow-blue);
}
.contact-icon {
  flex-shrink: 0;
  width: 44px; height: 44px;
  display: flex; align-items: center; justify-content: center;
  color: var(--c-gold-600);
  background: linear-gradient(135deg, rgba(212, 175, 55, .1), rgba(14, 109, 199, .08));
  border: 1px solid rgba(212, 175, 55, .3);
  border-radius: 10px;
}
.contact-icon svg { width: 22px; height: 22px; }
.contact-info { min-width: 0; }
.contact-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 2px;
  color: var(--c-blue-600);
  text-transform: uppercase;
  margin-bottom: 4px;
  font-family: var(--f-tech);
}
.contact-value {
  font-size: 16px;
  font-weight: 600;
  color: var(--c-blue-900);
  word-break: break-all;
  line-height: 1.3;
}
.contact-extra {
  font-size: 12px;
  color: var(--c-gray-600);
  margin-top: 4px;
}

.contact-cta {
  position: relative;
  display: flex; flex-direction: column; justify-content: space-between;
  padding: var(--sp-12);
  background: var(--grad-blue);
  color: var(--c-white);
  border-radius: var(--r-lg);
  overflow: hidden;
  isolation: isolate;
  transition: transform .35s var(--ease);
}
.contact-cta::before {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(circle at 80% 20%, rgba(212, 175, 55, .25) 0%, transparent 50%);
  z-index: -1;
}
.contact-cta:hover { transform: translateY(-4px); }
.contact-cta-inner {
  display: flex; align-items: center; justify-content: space-between;
}
.contact-cta-line {
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.contact-cta-arrow {
  font-size: 40px;
  color: var(--c-gold-400);
  transition: transform .3s var(--ease);
}
.contact-cta:hover .contact-cta-arrow { transform: translateX(8px); }
.contact-cta-hint {
  font-size: 13px;
  color: rgba(255, 255, 255, .65);
  margin: var(--sp-6) 0 0;
}

@media (max-width: 880px) {
  .contact-grid { grid-template-columns: 1fr; }
  .contact-cards { grid-template-columns: 1fr; }
}

/* ===========================================================
   页脚
   =========================================================== */
.footer {
  background: var(--c-blue-950);
  color: rgba(255, 255, 255, .6);
  padding: var(--sp-12) 0 var(--sp-8);
  border-top: 1px solid rgba(212, 175, 55, .15);
  position: relative;
}
.footer::before {
  content: '';
  position: absolute; top: 0; left: 50%;
  transform: translateX(-50%);
  width: 200px; height: 1px;
  background: var(--grad-gold);
}
.footer-inner {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: var(--sp-8);
  align-items: center;
}
.footer-brand {
  display: flex; align-items: center; gap: 12px;
}
.footer-name {
  font-size: 16px;
  font-weight: 700;
  color: var(--c-white);
  margin: 0;
}
.footer-tag {
  font-size: 12px;
  color: var(--c-gold-400);
  margin: 0;
  letter-spacing: 2px;
  font-family: var(--f-tech);
}
.footer-links {
  display: flex; gap: var(--sp-6);
  justify-content: center;
}
.footer-links a {
  font-size: 13px;
  color: rgba(255, 255, 255, .6);
  transition: color .2s var(--ease);
}
.footer-links a:hover { color: var(--c-gold-300); }
.footer-copy, .footer-icp {
  font-size: 12px;
  text-align: right;
  margin: 0;
  line-height: 1.7;
}
.footer-icp a { color: var(--c-gold-400); }
.footer-icp a:hover { color: var(--c-gold-300); }
@media (max-width: 720px) {
  .footer-inner { grid-template-columns: 1fr; text-align: center; }
  .footer-brand, .footer-links, .footer-copy, .footer-icp { justify-content: center; justify-self: center; text-align: center; }
}

/* ===========================================================
   滚动显示
   =========================================================== */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .9s var(--ease), transform .9s var(--ease);
  will-change: opacity, transform;
}
.reveal.in-view {
  opacity: 1;
  transform: translateY(0);
}
.reveal:nth-child(2).in-view { transition-delay: .08s; }
.reveal:nth-child(3).in-view { transition-delay: .16s; }
.reveal:nth-child(4).in-view { transition-delay: .24s; }
.reveal:nth-child(5).in-view { transition-delay: .32s; }
.reveal:nth-child(6).in-view { transition-delay: .40s; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    transition-duration: .01ms !important;
  }
}

/* ===========================================================
   软件下载
   =========================================================== */
.software-section {
  background: var(--c-blue-950);
  color: var(--c-white);
  position: relative;
  overflow: hidden;
}
.software-section::before {
  content: '';
  position: absolute; inset: 0;
  background:
    radial-gradient(circle at 15% 30%, rgba(0, 212, 255, .1) 0%, transparent 40%),
    radial-gradient(circle at 85% 70%, rgba(212, 175, 55, .08) 0%, transparent 40%);
  pointer-events: none;
}
.software-section .section-eyebrow { color: var(--c-gold-400); }
.software-section .section-title { color: var(--c-white); }
.software-section .title-accent {
  background: var(--grad-gold);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.software-section .section-lede { color: rgba(255, 255, 255, .6); }

/* ----------  UE5 推荐大卡  ---------- */
.sw-featured {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  margin-bottom: var(--sp-12);
  border-radius: var(--r-xl);
  overflow: hidden;
  border: 1px solid rgba(0, 212, 255, .22);
  background: linear-gradient(135deg, rgba(10, 37, 64, .92) 0%, rgba(14, 93, 163, .65) 100%);
  box-shadow: var(--shadow-deep);
}
.sw-featured-media {
  position: relative;
  min-height: 400px;
  overflow: hidden;
}
.sw-stage {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  background:
    linear-gradient(rgba(0, 212, 255, .05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 212, 255, .05) 1px, transparent 1px);
  background-size: 34px 34px;
  overflow: hidden;
}
.sw-building {
  position: relative;
  width: 170px; height: 250px;
  border: 2px solid rgba(0, 212, 255, .55);
  border-radius: 6px;
  background:
    linear-gradient(180deg, transparent 0 40px, rgba(0, 212, 255, .3) 40px 41px, transparent 41px 80px,
      rgba(0, 212, 255, .3) 80px 81px, transparent 81px 120px,
      rgba(0, 212, 255, .3) 120px 121px, transparent 121px 160px,
      rgba(0, 212, 255, .3) 160px 161px, transparent 161px 200px,
      rgba(0, 212, 255, .3) 200px 201px, transparent 201px),
    linear-gradient(90deg, transparent 0 42px, rgba(0, 212, 255, .2) 42px 43px, transparent 43px 85px,
      rgba(0, 212, 255, .2) 85px 86px, transparent 86px 127px);
  box-shadow:
    inset 0 0 40px rgba(0, 212, 255, .12),
    0 0 60px rgba(0, 212, 255, .25);
  animation: buildFloat 7s ease-in-out infinite;
}
.sw-building::before {
  content: '';
  position: absolute;
  top: -22px; left: 50%;
  transform: translateX(-50%);
  width: 2px; height: 22px;
  background: var(--c-gold-500);
}
.sw-building::after {
  content: '';
  position: absolute;
  top: -28px; left: 50%;
  transform: translateX(-50%);
  width: 9px; height: 9px;
  border-radius: 50%;
  background: var(--c-gold-500);
  box-shadow: 0 0 14px var(--c-gold-500);
}
@keyframes buildFloat {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-14px); }
}
.sw-wire {
  position: absolute;
  height: 1px;
  background: linear-gradient(90deg, rgba(212, 175, 55, .9), transparent);
  top: 34%; left: 52%;
  width: 150px;
}
.sw-wire-2 {
  top: 62%;
  transform: rotate(-24deg);
  width: 130px;
}
.sw-node {
  position: absolute;
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--c-gold-500);
  box-shadow: 0 0 14px var(--c-gold-500);
  top: 26%; right: 16%;
  animation: pulse 2.2s ease-in-out infinite;
}
.sw-node::after {
  content: '';
  position: absolute;
  inset: -6px;
  border: 1px solid rgba(212, 175, 55, .4);
  border-radius: 50%;
  animation: ripple 2.2s ease-out infinite;
}
@keyframes ripple {
  0%   { transform: scale(.6); opacity: 1; }
  100% { transform: scale(1.8); opacity: 0; }
}
.sw-brand {
  position: absolute;
  left: var(--sp-6); bottom: var(--sp-6);
  font-family: var(--f-tech);
  font-size: 13px;
  letter-spacing: 3px;
  color: rgba(255, 255, 255, .55);
}

.sw-featured-body {
  padding: var(--sp-12);
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.sw-flag {
  display: inline-block;
  align-self: flex-start;
  font-family: var(--f-tech);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 2px;
  color: var(--c-blue-950);
  background: var(--grad-gold);
  padding: 5px 12px;
  border-radius: 4px;
  margin: 0 0 var(--sp-6);
}
.sw-featured-body h3 {
  font-size: clamp(28px, 3.4vw, 40px);
  color: var(--c-white);
  margin-bottom: var(--sp-4);
  letter-spacing: -0.02em;
}
.sw-featured-desc {
  font-size: 15px;
  color: rgba(255, 255, 255, .72);
  line-height: 1.9;
  margin-bottom: var(--sp-6);
}
.sw-featured-desc strong {
  color: var(--c-gold-300);
  font-weight: 600;
}
.sw-featured-points {
  display: flex; flex-direction: column; gap: 10px;
  margin-bottom: var(--sp-8);
}
.sw-featured-points li {
  position: relative;
  padding-left: 22px;
  font-size: 14px;
  color: rgba(255, 255, 255, .72);
  line-height: 1.7;
}
.sw-featured-points li::before {
  content: '▸';
  position: absolute; left: 0;
  color: var(--c-gold-400);
}
.sw-featured-points strong { color: var(--c-gold-300); }
.sw-featured-cta {
  display: flex; flex-wrap: wrap;
  gap: var(--sp-4);
}
.sw-featured-cta .btn-ghost {
  background: rgba(255, 255, 255, .06);
  border-color: rgba(255, 255, 255, .25);
  color: var(--c-white);
}

/* ----------  软件卡片  ---------- */
.sw-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--sp-6);
}
.sw-card {
  padding: var(--sp-8) var(--sp-6);
  background: rgba(255, 255, 255, .04);
  border: 1px solid rgba(0, 212, 255, .14);
  border-radius: var(--r-lg);
  backdrop-filter: blur(10px);
  transition: transform .35s var(--ease), border-color .35s var(--ease), background .35s var(--ease);
}
.sw-card:hover {
  transform: translateY(-6px);
  border-color: var(--c-gold-500);
  background: rgba(255, 255, 255, .07);
}
.sw-icon {
  width: 52px; height: 52px;
  display: flex; align-items: center; justify-content: center;
  color: var(--c-gold-400);
  background: rgba(212, 175, 55, .1);
  border: 1px solid rgba(212, 175, 55, .25);
  border-radius: 12px;
  margin-bottom: var(--sp-4);
}
.sw-icon svg { width: 26px; height: 26px; }
.sw-card h3 {
  font-size: 18px;
  color: var(--c-white);
  margin-bottom: var(--sp-3);
}
.sw-card p {
  font-size: 13px;
  color: rgba(255, 255, 255, .6);
  line-height: 1.8;
  margin-bottom: var(--sp-6);
}
.sw-link {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 13px;
  font-weight: 600;
  color: var(--c-gold-400);
  transition: gap .25s var(--ease), color .25s var(--ease);
}
.sw-link:hover { color: var(--c-gold-300); gap: 10px; }

@media (max-width: 960px) {
  .sw-featured { grid-template-columns: 1fr; }
  .sw-featured-media { min-height: 300px; }
  .sw-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .sw-grid { grid-template-columns: 1fr; }
  .sw-featured-body { padding: var(--sp-8); }
}

/* ----------  UE5 案例视频  ---------- */
.sw-video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 2;
  background: #04101f;
}
/* 视频就绪后隐藏背后的 CSS 建筑动画层 */
.sw-stage:has(.sw-video) .sw-building,
.sw-stage:has(.sw-video) .sw-wire,
.sw-stage:has(.sw-video) .sw-node {
  display: none;
}
/* 视频上方保持网格纹理，增强科技感 */
.sw-stage::after {
  content: '';
  position: absolute;
  inset: 0;
  background:
    linear-gradient(rgba(0, 212, 255, .05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 212, 255, .05) 1px, transparent 1px);
  background-size: 34px 34px;
  pointer-events: none;
  z-index: 3;
}
.sw-stage .sw-brand {
  z-index: 4;
}
.sw-sound {
  position: absolute;
  right: 16px; bottom: 14px;
  z-index: 5;
  width: 40px; height: 40px;
  display: flex; align-items: center; justify-content: center;
  color: var(--c-white);
  background: rgba(6, 26, 48, .55);
  border: 1px solid rgba(255, 255, 255, .3);
  border-radius: 50%;
  backdrop-filter: blur(8px);
  transition: background .25s var(--ease), border-color .25s var(--ease);
}
.sw-sound svg { width: 20px; height: 20px; }
.sw-sound:hover { background: rgba(212, 175, 55, .3); border-color: var(--c-gold-400); }
.sw-sound.off svg path:last-child { display: none; }
/* 视频是内容展示，不随系统"减少动效"隐藏（原 display:none 会导致不显示） */
@media (prefers-reduced-motion: reduce) {
  .sw-video { display: block; }
}

/* ----------  Hero：品牌动画 iframe 展示  ---------- */
.hero-ad {
  padding: 0;
  align-items: stretch;
  background: #000;
}
.hero-ad-frame {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
  display: block;
  z-index: 1;
}
.hero-ad .hero-scroll { z-index: 6; }
@media (max-width: 960px) {
  .hero-ad .hero-scroll { display: none; }
}