/* ===========================
   云上数图科技 - 全站样式
   深色科技风 · 数字孪生
   =========================== */

/* ---------- 基础变量 ---------- */
:root {
  --bg: #050816;
  --bg-2: #0a1024;
  --bg-3: #0f1733;
  --bg-card: rgba(15, 23, 51, 0.6);
  --line: rgba(148, 163, 184, 0.12);
  --line-strong: rgba(0, 212, 255, 0.25);
  --primary: #00d4ff;
  --primary-2: #0099cc;
  --accent: #6366f1;
  --text: #e2e8f0;
  --text-2: #94a3b8;
  --text-3: #64748b;
  --white: #ffffff;
  --radius: 14px;
  --radius-sm: 8px;
  --shadow: 0 12px 40px rgba(0, 212, 255, 0.08);
  --shadow-lg: 0 24px 60px rgba(0, 0, 0, 0.4);
  --maxw: 1200px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

/* ---------- 重置 ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Helvetica Neue", system-ui, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { list-style: none; }
button { font: inherit; cursor: pointer; border: none; background: none; color: inherit; }

/* 全局背景光晕 */
body::before {
  content: "";
  position: fixed; inset: 0; z-index: -1;
  background:
    radial-gradient(ellipse at 20% 0%, rgba(0, 212, 255, 0.15) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 100%, rgba(99, 102, 241, 0.12) 0%, transparent 50%),
    var(--bg);
  pointer-events: none;
}

/* ---------- 布局工具 ---------- */
.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.section { padding: 110px 0; position: relative; }
.section-sm { padding: 70px 0; position: relative; }
.text-center { text-align: center; }

/* ---------- 排版 ---------- */
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; font-weight: 600; letter-spacing: .12em;
  color: var(--primary); text-transform: uppercase;
  padding: 6px 14px; border: 1px solid var(--line-strong); border-radius: 999px;
  background: rgba(0, 212, 255, 0.05);
  margin-bottom: 20px;
}
.eyebrow::before {
  content: ""; width: 6px; height: 6px; border-radius: 50%;
  background: var(--primary); box-shadow: 0 0 12px var(--primary);
}
.section-title {
  font-size: clamp(30px, 4.5vw, 48px);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.15;
  color: var(--white);
}
.section-title .glow {
  background: linear-gradient(120deg, var(--primary), var(--accent));
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.section-sub {
  margin-top: 18px; font-size: 17px; color: var(--text-2); max-width: 640px;
}
.text-center .section-sub { margin-left: auto; margin-right: auto; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 28px; border-radius: 999px;
  font-weight: 600; font-size: 15px;
  transition: all .3s var(--ease); white-space: nowrap;
  border: 1px solid transparent;
}
.btn-primary {
  background: linear-gradient(120deg, var(--primary), var(--primary-2));
  color: #001824; font-weight: 700;
  box-shadow: 0 8px 24px rgba(0, 212, 255, 0.35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 32px rgba(0, 212, 255, 0.5); }
.btn-ghost {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  border: 1px solid var(--line);
  backdrop-filter: blur(10px);
}
.btn-ghost:hover { border-color: var(--primary); color: var(--primary); background: rgba(0, 212, 255, 0.06); }
.btn-lg { padding: 16px 34px; font-size: 16px; }

/* ---------- 顶部导航 ---------- */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(5, 8, 22, 0.6);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: all .3s var(--ease);
}
.navbar.scrolled { border-bottom-color: var(--line); background: rgba(5, 8, 22, 0.85); }
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.logo { display: flex; align-items: center; gap: 12px; font-weight: 800; font-size: 18px; letter-spacing: -0.01em; color: var(--white); }
.logo-mark {
  width: 38px; height: 38px; border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: grid; place-items: center; color: #001824;
  box-shadow: 0 0 24px rgba(0, 212, 255, 0.4);
}
.logo-mark svg { width: 22px; height: 22px; }
.logo small { display: block; font-size: 10px; color: var(--text-2); font-weight: 500; letter-spacing: 0.15em; margin-top: -2px; }
.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-links a {
  padding: 8px 18px; border-radius: 8px; font-size: 15px; font-weight: 500; color: var(--text-2);
  transition: all .2s var(--ease);
}
.nav-links a:hover { color: var(--white); background: rgba(255, 255, 255, 0.05); }
.nav-links a.active { color: var(--primary); }
.nav-cta { margin-left: 12px; }
.lang-toggle { display: flex; align-items: center; gap: 2px; margin-left: 8px; padding: 4px; border-radius: 8px; border: 1px solid var(--line); background: rgba(15,23,51,0.4); }
.lang-toggle a { padding: 4px 10px; border-radius: 6px; font-size: 12px; font-weight: 700; color: var(--text-2); transition: all .2s var(--ease); letter-spacing: 0.02em; }
.lang-toggle a:hover { color: var(--white); }
.lang-toggle a.active { color: var(--bg); background: var(--primary); }
.lang-toggle .sep { color: var(--text-3); font-size: 11px; }
.nav-toggle { display: none; flex-direction: column; gap: 5px; padding: 8px; }
.nav-toggle span { width: 22px; height: 2px; background: var(--text); border-radius: 2px; transition: all .3s var(--ease); }
.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 ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex; align-items: center;
  padding: 140px 0 100px;
  overflow: hidden;
}
.hero-bg {
  position: absolute; inset: 0; z-index: 0;
  background: url("../images/products/04-城市宏观.jpg") center/cover no-repeat;
  filter: brightness(0.55) contrast(1.1) saturate(1.15);
}
.hero-bg::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(5,8,22,0.5) 0%, rgba(5,8,22,0.7) 50%, var(--bg) 100%);
}
.hero-content { position: relative; z-index: 2; max-width: 820px; }
.hero h1 {
  font-size: clamp(38px, 6vw, 68px);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.03em;
  color: var(--white);
}
.hero h1 .glow {
  background: linear-gradient(120deg, #00d4ff 0%, #6366f1 50%, #a855f7 100%);
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.hero-lead { margin-top: 26px; font-size: 19px; color: rgba(255,255,255,0.85); max-width: 620px; line-height: 1.6; }
.hero-actions { margin-top: 40px; display: flex; gap: 16px; flex-wrap: wrap; }
.hero-meta { margin-top: 60px; display: flex; gap: 50px; flex-wrap: wrap; padding-top: 30px; border-top: 1px solid var(--line); }
.hero-meta-item .num { font-size: 32px; font-weight: 800; color: var(--white); font-family: -apple-system, monospace; }
.hero-meta-item .num .plus { color: var(--primary); }
.hero-meta-item .lbl { font-size: 13px; color: var(--text-2); letter-spacing: 0.05em; margin-top: 2px; }

/* ---------- 客户 logo 条 ---------- */
.client-strip { padding: 50px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: rgba(255,255,255,0.02); }
.client-strip .label { text-align: center; font-size: 13px; color: var(--text-3); letter-spacing: 0.15em; margin-bottom: 28px; }
.client-row { display: flex; flex-wrap: wrap; justify-content: center; gap: 50px; align-items: center; }
.client-row .ll { font-size: 18px; font-weight: 600; color: var(--text-3); letter-spacing: 0.05em; padding: 8px 16px; border: 1px solid transparent; border-radius: 6px; transition: all .3s; }
.client-row .ll:hover { color: var(--text); border-color: var(--line); }

/* ---------- 能力区 ---------- */
.cap-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.cap-card {
  padding: 36px 30px; border-radius: var(--radius);
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(15, 23, 51, 0.6) 0%, rgba(15, 23, 51, 0.2) 100%);
  backdrop-filter: blur(10px);
  transition: all .3s var(--ease);
  position: relative; overflow: hidden;
}
.cap-card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, var(--primary), transparent);
  opacity: 0; transition: opacity .3s;
}
.cap-card:hover { transform: translateY(-6px); border-color: var(--line-strong); box-shadow: var(--shadow); }
.cap-card:hover::before { opacity: 1; }
.cap-ic {
  width: 54px; height: 54px; border-radius: 14px;
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.15), rgba(99, 102, 241, 0.15));
  border: 1px solid var(--line-strong);
  color: var(--primary); display: grid; place-items: center; margin-bottom: 22px;
}
.cap-ic svg { width: 26px; height: 26px; }
.cap-card h3 { font-size: 19px; font-weight: 700; color: var(--white); margin-bottom: 12px; }
.cap-card p { font-size: 14.5px; color: var(--text-2); line-height: 1.65; }

/* ---------- 数据统计 ---------- */
.stats-section { position: relative; padding: 90px 0; background: linear-gradient(180deg, transparent, rgba(0, 212, 255, 0.04), transparent); }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px; }
.stat-item { text-align: center; padding: 20px; border-left: 1px solid var(--line); }
.stat-item:first-child { border-left: none; }
.stat-num { font-size: clamp(34px, 4vw, 48px); font-weight: 800; color: var(--white); font-family: -apple-system, monospace; background: linear-gradient(180deg, var(--primary), #a855f7); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.stat-lbl { margin-top: 8px; font-size: 14px; color: var(--text-2); letter-spacing: 0.05em; }

/* ---------- 案例展示 ---------- */
.case-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; }
.case-card {
  border-radius: var(--radius); overflow: hidden;
  background: var(--bg-3); border: 1px solid var(--line);
  transition: all .3s var(--ease);
}
.case-card:hover { transform: translateY(-4px); border-color: var(--line-strong); box-shadow: var(--shadow-lg); }
.case-img { height: 280px; background-size: cover; background-position: center; position: relative; overflow: hidden; }
.case-img::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 60%, rgba(5,8,22,0.6)); }
.case-body { padding: 28px; }
.case-tag { display: inline-block; font-size: 12px; font-weight: 600; padding: 4px 12px; border-radius: 999px; background: rgba(0, 212, 255, 0.1); color: var(--primary); margin-bottom: 14px; }
.case-body h3 { font-size: 20px; font-weight: 700; color: var(--white); margin-bottom: 10px; }
.case-body p { font-size: 14.5px; color: var(--text-2); }
.case-meta { margin-top: 18px; display: flex; gap: 14px; flex-wrap: wrap; font-size: 13px; color: var(--text-3); }
.case-meta span { display: inline-flex; align-items: center; gap: 6px; }
.case-meta svg { width: 14px; height: 14px; color: var(--primary); }

/* ---------- CTA 区 ---------- */
.cta-band { position: relative; }
.cta-inner {
  position: relative; overflow: hidden;
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.08) 0%, rgba(99, 102, 241, 0.08) 100%);
  border: 1px solid var(--line-strong);
  border-radius: 24px; padding: 64px 60px; color: var(--white);
}
.cta-inner::before {
  content: ""; position: absolute; inset: 0;
  background:
    radial-gradient(ellipse at top right, rgba(0, 212, 255, 0.15), transparent 50%),
    radial-gradient(ellipse at bottom left, rgba(99, 102, 241, 0.15), transparent 50%);
  pointer-events: none;
}
.cta-inner > * { position: relative; z-index: 1; }
.cta-inner h2 { font-size: clamp(28px, 4vw, 42px); font-weight: 800; letter-spacing: -0.02em; line-height: 1.2; }
.cta-inner p { margin-top: 16px; font-size: 17px; color: var(--text-2); max-width: 540px; }
.cta-actions { margin-top: 30px; display: flex; gap: 14px; flex-wrap: wrap; }

/* ---------- 页脚 ---------- */
.footer { background: var(--bg); border-top: 1px solid var(--line); padding: 70px 0 28px; }
.footer-grid { display: grid; grid-template-columns: 1.7fr 1fr 1fr 1fr; gap: 40px; }
.footer .logo { color: var(--white); margin-bottom: 4px; }
.footer .desc { font-size: 14px; color: var(--text-2); margin-top: 16px; max-width: 320px; line-height: 1.7; }
.footer h4 { color: var(--white); font-size: 14px; font-weight: 700; margin-bottom: 18px; letter-spacing: 0.05em; }
.footer ul li { margin-bottom: 10px; }
.footer ul a { font-size: 14px; color: var(--text-2); transition: color .2s; }
.footer ul a:hover { color: var(--primary); }
.footer-bottom { margin-top: 50px; padding-top: 24px; border-top: 1px solid var(--line); display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; font-size: 13px; color: var(--text-3); }
.footer-bottom a { color: var(--text-2); }

/* ---------- 页面通用 banner ---------- */
.page-banner { position: relative; padding: 160px 0 80px; text-align: center; overflow: hidden; }
.page-banner::before {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background: radial-gradient(ellipse at center, rgba(0, 212, 255, 0.12) 0%, transparent 60%);
}
.page-banner h1 { font-size: clamp(34px, 5vw, 54px); font-weight: 800; letter-spacing: -0.03em; color: var(--white); line-height: 1.15; }
.page-banner p { margin: 20px auto 0; font-size: 18px; color: var(--text-2); max-width: 620px; }

/* ---------- 关于页 ---------- */
.about-intro-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.about-intro-grid p { font-size: 16px; color: var(--text-2); margin-bottom: 16px; line-height: 1.8; }
.check-list { margin-top: 24px; }
.check-list li { display: flex; gap: 12px; align-items: flex-start; margin-bottom: 14px; font-size: 15px; color: var(--text); }
.check-list svg { width: 22px; height: 22px; color: var(--primary); flex-shrink: 0; margin-top: 1px; padding: 4px; border-radius: 6px; background: rgba(0, 212, 255, 0.1); }

.value-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; }
.value-card { padding: 36px; border-radius: var(--radius); background: var(--bg-card); border: 1px solid var(--line); transition: all .3s; }
.value-card:hover { border-color: var(--line-strong); }
.value-card .num { font-size: 14px; font-weight: 700; color: var(--primary); letter-spacing: 0.1em; }
.value-card h3 { margin: 12px 0 14px; font-size: 21px; font-weight: 700; color: var(--white); }
.value-card p { font-size: 14.5px; color: var(--text-2); line-height: 1.7; }

.timeline { position: relative; max-width: 780px; margin: 0 auto; }
.timeline::before { content:""; position: absolute; left: 20px; top: 0; bottom: 0; width: 2px; background: linear-gradient(180deg, var(--primary), var(--accent)); opacity: 0.4; }
.tl-item { position: relative; padding-left: 60px; padding-bottom: 40px; }
.tl-item:last-child { padding-bottom: 0; }
.tl-dot { position: absolute; left: 11px; top: 6px; width: 20px; height: 20px; border-radius: 50%; background: var(--bg); border: 3px solid var(--primary); box-shadow: 0 0 16px rgba(0, 212, 255, 0.5); }
.tl-year { font-size: 14px; font-weight: 700; color: var(--primary); letter-spacing: 0.05em; }
.tl-item h4 { font-size: 19px; font-weight: 700; color: var(--white); margin: 4px 0 8px; }
.tl-item p { font-size: 15px; color: var(--text-2); }

.team-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 24px; }
.team-card { text-align: center; padding: 24px; border-radius: var(--radius); background: var(--bg-card); border: 1px solid var(--line); transition: all .3s; }
.team-card:hover { transform: translateY(-4px); border-color: var(--line-strong); }
.team-avatar { width: 100%; aspect-ratio: 1; border-radius: var(--radius); background: linear-gradient(135deg, rgba(0, 212, 255, 0.2), rgba(99, 102, 241, 0.2)); display: grid; place-items: center; margin-bottom: 16px; border: 1px solid var(--line); }
.team-avatar span { font-size: 38px; font-weight: 800; background: linear-gradient(135deg, var(--primary), var(--accent)); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.team-card h4 { font-size: 17px; font-weight: 700; color: var(--white); }
.team-card .role { font-size: 13px; color: var(--primary); margin-top: 2px; letter-spacing: 0.03em; }
.team-card p { font-size: 13px; color: var(--text-2); margin-top: 10px; line-height: 1.6; }

/* ---------- 产品页 ---------- */
.prod-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 28px; }
.prod-card {
  border-radius: var(--radius); overflow: hidden;
  background: var(--bg-card); border: 1px solid var(--line);
  transition: all .3s var(--ease); display: flex; flex-direction: column;
}
.prod-card:hover { transform: translateY(-6px); border-color: var(--line-strong); box-shadow: var(--shadow); }
.prod-thumb { height: 200px; position: relative; overflow: hidden; }
.prod-thumb img { width: 100%; height: 100%; object-fit: cover; }
.prod-thumb::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 50%, rgba(5,8,22,0.85)); }
.prod-tag { position: absolute; top: 14px; right: 14px; z-index: 2; font-size: 12px; font-weight: 600; padding: 4px 12px; border-radius: 999px; background: rgba(0, 212, 255, 0.2); color: var(--primary); border: 1px solid var(--line-strong); backdrop-filter: blur(10px); }
.prod-body { padding: 28px; flex: 1; display: flex; flex-direction: column; }
.prod-body h3 { font-size: 21px; font-weight: 700; color: var(--white); }
.prod-body p { margin-top: 10px; font-size: 14.5px; color: var(--text-2); flex: 1; line-height: 1.7; }
.prod-features { margin: 18px 0; padding-top: 18px; border-top: 1px solid var(--line); }
.prod-features li { font-size: 13.5px; color: var(--text); display: flex; gap: 10px; align-items: center; margin-bottom: 8px; }
.prod-features svg { width: 16px; height: 16px; color: var(--primary); flex-shrink: 0; }
.prod-link { font-size: 14px; font-weight: 600; color: var(--primary); display: flex; align-items: center; gap: 6px; margin-top: auto; }
.prod-link:hover { gap: 10px; }

.feature-row { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; margin-bottom: 80px; }
.feature-row.reverse { direction: rtl; }
.feature-row.reverse > * { direction: ltr; }
.feature-row .visual { position: relative; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line); aspect-ratio: 4/3; }
.feature-row .visual img { width: 100%; height: 100%; object-fit: cover; }
.feature-row .visual::after { content: ""; position: absolute; inset: 0; background: linear-gradient(135deg, rgba(0, 212, 255, 0.1), transparent); }
.feature-row h3 { font-size: 28px; font-weight: 800; color: var(--white); margin-bottom: 16px; line-height: 1.25; }
.feature-row p { font-size: 16px; color: var(--text-2); margin-bottom: 24px; line-height: 1.7; }
.feature-row ul li { display: flex; gap: 10px; align-items: center; padding: 8px 0; font-size: 15px; color: var(--text); }
.feature-row ul svg { width: 18px; height: 18px; color: var(--primary); }

.industry-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.industry-card {
  padding: 32px 24px; border-radius: var(--radius); text-align: center;
  background: var(--bg-card); border: 1px solid var(--line);
  transition: all .3s var(--ease);
}
.industry-card:hover { border-color: var(--line-strong); transform: translateY(-4px); }
.industry-card .ic { width: 56px; height: 56px; border-radius: 14px; background: linear-gradient(135deg, rgba(0, 212, 255, 0.15), rgba(99, 102, 241, 0.15)); border: 1px solid var(--line-strong); display: grid; place-items: center; margin: 0 auto 16px; color: var(--primary); }
.industry-card .ic svg { width: 26px; height: 26px; }
.industry-card h4 { font-size: 17px; font-weight: 700; color: var(--white); }
.industry-card p { font-size: 13px; color: var(--text-2); margin-top: 6px; line-height: 1.6; }

/* ---------- 联系页 ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1.1fr; gap: 50px; align-items: start; }
.contact-info h3 { font-size: 24px; font-weight: 700; color: var(--white); margin-bottom: 10px; }
.contact-info > p { color: var(--text-2); font-size: 15px; }
.contact-list { margin-top: 32px; }
.contact-list li { display: flex; gap: 16px; padding: 18px 0; border-bottom: 1px solid var(--line); align-items: flex-start; }
.contact-list .ic { width: 44px; height: 44px; border-radius: 12px; background: linear-gradient(135deg, rgba(0, 212, 255, 0.15), rgba(99, 102, 241, 0.15)); border: 1px solid var(--line-strong); color: var(--primary); display: grid; place-items: center; flex-shrink: 0; }
.contact-list .ic svg { width: 20px; height: 20px; }
.contact-list .k { font-size: 13px; color: var(--text-3); letter-spacing: 0.05em; margin-bottom: 4px; }
.contact-list .v { font-size: 15px; font-weight: 600; color: var(--white); }

.contact-form {
  background: var(--bg-card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 40px; backdrop-filter: blur(10px);
}
.contact-form h3 { font-size: 22px; font-weight: 700; color: var(--white); }
.contact-form > p { color: var(--text-2); font-size: 14px; margin-top: 6px; }
.form-row { margin-top: 22px; }
.form-row label { display: block; font-size: 13px; font-weight: 600; color: var(--text); margin-bottom: 8px; letter-spacing: 0.02em; }
.form-row label .req { color: var(--primary); }
.form-row input, .form-row textarea, .form-row select {
  width: 100%; padding: 12px 16px; border: 1px solid var(--line); border-radius: var(--radius-sm);
  font-size: 15px; font-family: inherit; transition: border-color .2s, background .2s;
  background: rgba(255,255,255,0.03); color: var(--white);
}
.form-row input::placeholder, .form-row textarea::placeholder { color: var(--text-3); }
.form-row input:focus, .form-row textarea:focus, .form-row select:focus { outline: none; border-color: var(--primary); background: rgba(0, 212, 255, 0.05); }
.form-row select { appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8' fill='none'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%2394a3b8' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 16px center; padding-right: 40px; }
.form-row select option { background: var(--bg-3); color: var(--white); }
.form-row textarea { resize: vertical; min-height: 120px; }
.form-2col { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-2col .form-row { margin-top: 22px; }
.form-note { font-size: 13px; color: var(--text-3); margin-top: 16px; }
.form-success { display: none; padding: 14px 16px; border-radius: var(--radius-sm); background: rgba(16, 185, 129, 0.1); border: 1px solid rgba(16, 185, 129, 0.3); color: #34d399; font-size: 14px; font-weight: 600; margin-top: 18px; }
.form-success.show { display: block; }

/* ---------- VR 样板间鉴赏 ---------- */
.showcase-hero { position: relative; border-radius: 16px; overflow: hidden; margin-top: 56px; border: 1px solid var(--line); background: var(--bg-3); box-shadow: 0 24px 80px rgba(0,0,0,0.4); }
.showcase-hero img { display: block; width: 100%; height: auto; aspect-ratio: 16 / 8; object-fit: cover; }
.showcase-hero-overlay { position: absolute; inset: 0; background: linear-gradient(180deg, rgba(5,8,22,0.05) 0%, rgba(5,8,22,0.45) 70%, rgba(5,8,22,0.85) 100%); display: flex; align-items: flex-end; padding: 40px; pointer-events: none; }
.showcase-hero-overlay .o-body { color: var(--white); max-width: 560px; }
.showcase-hero-overlay .o-body .eyebrow { background: rgba(0,212,255,0.18); color: var(--primary); border: 1px solid rgba(0,212,255,0.4); padding: 4px 12px; border-radius: 999px; font-size: 12px; font-weight: 700; }
.showcase-hero-overlay h3 { font-size: clamp(22px, 3vw, 30px); font-weight: 800; margin: 14px 0 10px; letter-spacing: -0.02em; line-height: 1.25; }
.showcase-hero-overlay p { font-size: 15px; color: rgba(255,255,255,0.82); line-height: 1.6; }

.showcase-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; margin-top: 48px; }
.showcase-col h4 { font-size: 18px; font-weight: 700; margin-bottom: 6px; color: var(--white); display: flex; align-items: center; gap: 10px; }
.showcase-col h4 .num { font-family: -apple-system, monospace; font-size: 13px; color: var(--primary); background: rgba(0,212,255,0.1); padding: 4px 10px; border-radius: 999px; border: 1px solid rgba(0,212,255,0.25); }
.showcase-col > .sub { font-size: 13px; color: var(--text-3); margin-bottom: 22px; }
.showcase-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.showcase-tile { position: relative; border-radius: 12px; overflow: hidden; aspect-ratio: 16 / 10; background: var(--bg-3); border: 1px solid var(--line); cursor: pointer; transition: transform .4s var(--ease), border-color .3s, box-shadow .4s var(--ease); }
.showcase-tile img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s var(--ease); display: block; }
.showcase-tile:hover { transform: translateY(-4px); border-color: rgba(0,212,255,0.5); box-shadow: 0 16px 40px rgba(0,212,255,0.15); }
.showcase-tile:hover img { transform: scale(1.06); }
.showcase-tile::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 55%, rgba(5,8,22,0.6)); pointer-events: none; }
.showcase-tile .label { position: absolute; left: 14px; bottom: 12px; right: 14px; font-size: 12px; font-weight: 600; color: var(--white); letter-spacing: 0.02em; z-index: 2; }

/* ---------- 视频案例 ---------- */
.video-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 28px; margin-top: 56px; }
.video-card { border-radius: 14px; overflow: hidden; background: var(--bg-3); border: 1px solid var(--line); transition: border-color .3s, box-shadow .4s var(--ease); }
.video-card:hover { border-color: rgba(0,212,255,0.45); box-shadow: 0 16px 50px rgba(0,212,255,0.12); }
.video-card .v-wrap { position: relative; aspect-ratio: 16 / 9; background: #000; overflow: hidden; }
.video-card video { width: 100%; height: 100%; object-fit: cover; display: block; }
.video-card .v-poster { position: absolute; inset: 0; background-size: cover; background-position: center; cursor: pointer; display: flex; align-items: center; justify-content: center; transition: opacity .35s; z-index: 2; }
.video-card .v-poster::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(5,8,22,0.12), rgba(5,8,22,0.55)); }
.video-card .play-btn { position: relative; z-index: 2; width: 64px; height: 64px; border-radius: 50%; background: rgba(0,212,255,0.85); display: grid; place-items: center; transition: transform .3s var(--ease), background .3s; box-shadow: 0 0 0 10px rgba(0,212,255,0.14); }
.video-card .play-btn svg { width: 26px; height: 26px; fill: #fff; margin-left: 3px; }
.video-card .v-poster:hover .play-btn { transform: scale(1.14); background: var(--primary); }
.video-card .v-poster.hidden { opacity: 0; pointer-events: none; }
.video-card .v-body { padding: 20px 22px; }
.video-card .v-tag { display: inline-block; font-size: 12px; font-weight: 600; color: var(--primary); background: rgba(0,212,255,0.1); padding: 3px 12px; border-radius: 999px; border: 1px solid rgba(0,212,255,0.25); margin-bottom: 10px; }
.video-card .v-body h4 { font-size: 17px; font-weight: 700; color: var(--white); margin-bottom: 6px; }
.video-card .v-body p { font-size: 14px; color: var(--text-2); line-height: 1.6; }

@media (max-width: 768px) {
  .video-grid { grid-template-columns: 1fr; }
}

@media (max-width: 880px) {
  .showcase-grid { grid-template-columns: 1fr; gap: 40px; }
  .showcase-hero-overlay { padding: 24px; }
}

/* ---------- 滚动渐显 ---------- */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .8s var(--ease), transform .8s var(--ease); }
.reveal.in { opacity: 1; transform: none; }

/* ---------- 响应式 ---------- */
@media (max-width: 960px) {
  .hero { min-height: auto; padding: 120px 0 70px; }
  .cap-grid, .value-grid, .prod-grid { grid-template-columns: repeat(2,1fr); }
  .stats-grid { grid-template-columns: repeat(2,1fr); gap: 30px; }
  .stat-item:nth-child(3) { border-left: none; }
  .team-grid { grid-template-columns: repeat(2,1fr); }
  .industry-grid { grid-template-columns: repeat(2,1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 30px; }
  .about-intro-grid, .contact-grid, .case-grid, .feature-row { grid-template-columns: 1fr; gap: 36px; direction: ltr; }
  .feature-row.reverse { direction: ltr; }
  .cta-inner { padding: 44px 32px; }
}
@media (max-width: 640px) {
  .section { padding: 80px 0; }
  .nav-links { display: none; position: absolute; top: 72px; left: 0; right: 0; flex-direction: column; background: rgba(5,8,22,0.95); padding: 16px; border-bottom: 1px solid var(--line); box-shadow: var(--shadow-lg); gap: 4px; }
  .nav-links.open { display: flex; }
  .nav-links a { width: 100%; }
  .nav-cta { display: none; }
  .nav-toggle { display: flex; }
  .lang-toggle { margin-left: 4px; }
  .cap-grid, .value-grid, .prod-grid, .stats-grid, .team-grid, .industry-grid { grid-template-columns: 1fr; }
  .stat-item { border-left: none !important; border-top: 1px solid var(--line); padding-top: 24px; }
  .stat-item:first-child { border-top: none; padding-top: 0; }
  .footer-grid { grid-template-columns: 1fr; }
  .form-2col { grid-template-columns: 1fr; }
  .hero-meta { gap: 30px; }
  .case-img { height: 200px; }
}