/* ============ 基础与变量 ============ */
:root {
  --bg: #060a16;
  --bg2: #0a1024;
  --panel: rgba(18, 26, 48, 0.55);
  --panel-solid: #0e1530;
  --cyan: #22d3ee;
  --blue: #3b82f6;
  --purple: #a855f7;
  --pink: #ec4899;
  --green: #34d399;
  --amber: #f59e0b;
  --text: #e8edff;
  --muted: #93a0c9;
  --border: rgba(120, 140, 220, 0.18);
  --border-strong: rgba(120, 160, 255, 0.4);
  --grad: linear-gradient(135deg, #22d3ee 0%, #6366f1 50%, #a855f7 100%);
  --grad-soft: linear-gradient(135deg, rgba(34,211,238,.18), rgba(168,85,247,.18));
  --shadow: 0 20px 60px -20px rgba(0, 0, 0, .7);
  --radius: 18px;
  --maxw: 1200px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: "Rajdhani", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  overflow-x: hidden;
  letter-spacing: .2px;
}

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

/* ============ 科技背景 ============ */
#bg-canvas {
  position: fixed; inset: 0; width: 100%; height: 100%;
  z-index: 0; pointer-events: none;
}
.bg-orbs { position: fixed; inset: 0; z-index: 0; overflow: hidden; pointer-events: none; }
.orb {
  position: absolute; border-radius: 50%; filter: blur(90px); opacity: .55;
  animation: float 18s ease-in-out infinite;
}
.orb-1 { width: 520px; height: 520px; background: radial-gradient(circle, #1e90ff, transparent 70%); top: -120px; left: -80px; }
.orb-2 { width: 480px; height: 480px; background: radial-gradient(circle, #a855f7, transparent 70%); bottom: -100px; right: -60px; animation-delay: -6s; }
.orb-3 { width: 380px; height: 380px; background: radial-gradient(circle, #22d3ee, transparent 70%); top: 40%; left: 55%; animation-delay: -11s; }
@keyframes float {
  0%,100% { transform: translate(0,0) scale(1); }
  50% { transform: translate(40px,-30px) scale(1.12); }
}
.bg-grid {
  position: fixed; inset: 0; z-index: 0; pointer-events: none; opacity: .35;
  background-image:
    linear-gradient(rgba(120,140,220,.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(120,140,220,.07) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(circle at 50% 30%, #000 0%, transparent 80%);
  -webkit-mask-image: radial-gradient(circle at 50% 30%, #000 0%, transparent 80%);
}

/* ============ 导航 ============ */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px clamp(16px, 4vw, 48px);
  background: rgba(6, 10, 22, 0.35);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: background .3s, border-color .3s;
}
.nav.scrolled { background: rgba(6, 10, 22, 0.8); border-bottom-color: var(--border); }
.nav-logo { display: flex; align-items: center; gap: 10px; }
.logo-mark {
  font-family: "Orbitron", sans-serif; font-weight: 900; font-size: 20px;
  background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent;
  letter-spacing: 1px;
}
.logo-en { font-family: "Orbitron", sans-serif; font-size: 10px; color: var(--muted); letter-spacing: 2px; }
.nav-links { display: flex; align-items: center; gap: clamp(14px, 2vw, 30px); }
.nav-links a {
  font-size: 15px; font-weight: 600; color: var(--muted); position: relative;
  transition: color .25s; padding: 4px 0;
}
.nav-links a:hover, .nav-links a.active { color: var(--text); }
.nav-links a::after {
  content: ""; position: absolute; left: 0; bottom: -4px; height: 2px; width: 0;
  background: var(--grad); transition: width .3s; border-radius: 2px;
}
.nav-links a:hover::after, .nav-links a.active::after { width: 100%; }
.nav-cta {
  padding: 8px 18px !important; border-radius: 999px; color: #fff !important;
  background: var(--grad); box-shadow: 0 8px 24px -8px rgba(99,102,241,.8);
  border: none;
}
.nav-cta::after { display: none; }
.nav-cta:hover { filter: brightness(1.1); }
.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 6px; }
.nav-toggle span { width: 24px; height: 2px; background: var(--text); border-radius: 2px; transition: .3s; }

/* ============ 通用容器/区块 ============ */
.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 clamp(16px, 4vw, 40px); }
.section { position: relative; z-index: 2; padding: clamp(64px, 9vw, 120px) 0; }
.section-alt { background: linear-gradient(180deg, rgba(10,16,36,.4), rgba(10,16,36,0)); }
.section-head { text-align: center; max-width: 760px; margin: 0 auto 48px; }
.kicker {
  display: inline-block; font-family: "Orbitron", sans-serif; font-size: 12px; letter-spacing: 3px;
  color: var(--cyan); padding: 5px 14px; border: 1px solid var(--border-strong);
  border-radius: 999px; margin-bottom: 18px; background: rgba(34,211,238,.06);
}
.section-title { font-size: clamp(28px, 4.5vw, 46px); font-weight: 700; line-height: 1.15; }
.grad { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.section-sub { color: var(--muted); margin-top: 14px; font-size: clamp(15px, 2vw, 18px); }

/* ============ 按钮 ============ */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 26px; border-radius: 999px; font-weight: 700; font-size: 15px;
  cursor: pointer; border: 1px solid var(--border-strong); background: transparent; color: var(--text);
  transition: transform .2s, box-shadow .3s, background .3s; font-family: inherit;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--grad); border: none; color: #fff; box-shadow: 0 12px 30px -10px rgba(99,102,241,.8); }
.btn-ghost { background: rgba(255,255,255,.04); }

/* ============ 首屏 Banner ============ */
.hero { position: relative; z-index: 2; height: 100vh; min-height: 620px; overflow: hidden; }
.hero-slides { position: absolute; inset: 0; }
.hero-slide {
  position: absolute; inset: 0; display: flex; flex-direction: column; justify-content: center;
  padding: 0 clamp(20px, 8vw, 120px); opacity: 0; transform: scale(1.06);
  transition: opacity 1s ease, transform 1.2s ease; pointer-events: none;
}
.hero-slide.active { opacity: 1; transform: scale(1); pointer-events: auto; }
.hero-slide .tag {
  font-family: "Orbitron", sans-serif; letter-spacing: 4px; font-size: 13px; color: var(--cyan);
  margin-bottom: 18px; opacity: 0; transform: translateY(20px); transition: .8s .2s;
}
.hero-slide .h-title {
  font-family: "Orbitron", "Rajdhani", sans-serif; font-weight: 900;
  font-size: clamp(34px, 7vw, 82px); line-height: 1.05; max-width: 14ch;
  text-shadow: 0 4px 40px rgba(0,0,0,.5);
}
.hero-slide .h-sub { margin-top: 22px; font-size: clamp(16px, 2.4vw, 22px); color: #cdd6f5; max-width: 40ch; }
.hero-slide .h-actions { margin-top: 36px; display: flex; gap: 16px; flex-wrap: wrap; }
.hero-slide.active .tag,
.hero-slide.active .h-title,
.hero-slide.active .h-sub,
.hero-slide.active .h-actions { opacity: 1; transform: none; }
.hero-slide.active .h-title { transition: opacity .8s .35s, transform .8s .35s; }
.hero-slide.active .h-sub { transition: opacity .8s .5s, transform .8s .5s; }
.hero-slide.active .h-actions { transition: opacity .8s .65s, transform .8s .65s; }
.hero-dots { position: absolute; bottom: 36px; left: 50%; transform: translateX(-50%); display: flex; gap: 12px; z-index: 3; }
.hero-dots button { width: 36px; height: 4px; border-radius: 4px; border: none; background: rgba(255,255,255,.25); cursor: pointer; transition: .3s; }
.hero-dots button.active { background: var(--grad); width: 56px; }
.scroll-hint { position: absolute; bottom: 28px; right: clamp(20px,8vw,120px); z-index: 3; width: 26px; height: 44px; border: 2px solid rgba(255,255,255,.4); border-radius: 16px; display: flex; justify-content: center; padding-top: 8px; }
.scroll-hint span { width: 4px; height: 8px; background: var(--cyan); border-radius: 4px; animation: scrolldot 1.6s infinite; }
@keyframes scrolldot { 0% { transform: translateY(0); opacity: 1; } 70% { transform: translateY(14px); opacity: 0; } 100% { opacity: 0; } }

/* ============ 关于脉界 ============ */
.about-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 40px; align-items: stretch; }
.about-text p { font-size: clamp(15px, 1.8vw, 18px); color: #c6cff0; }
.about-vm { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 26px; }
.vm-card { background: var(--panel); border: 1px solid var(--border); border-radius: 14px; padding: 18px; backdrop-filter: blur(8px); }
.vm-card h4 { font-family: "Orbitron", sans-serif; font-size: 13px; letter-spacing: 2px; color: var(--cyan); margin-bottom: 8px; }
.vm-card p { font-size: 14px; color: var(--muted); }
.about-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.stat-card {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 26px 22px; backdrop-filter: blur(10px); position: relative; overflow: hidden;
}
.stat-card::before { content: ""; position: absolute; top: -40px; right: -40px; width: 120px; height: 120px; background: var(--grad-soft); border-radius: 50%; filter: blur(20px); }
.stat-num { font-family: "Orbitron", sans-serif; font-weight: 900; font-size: clamp(30px, 4vw, 46px); background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.stat-label { color: var(--muted); font-size: 14px; margin-top: 4px; position: relative; }

/* ============ 筛选器 ============ */
.filters { display: flex; flex-direction: column; gap: 14px; margin-bottom: 36px; }
.filter-row { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.filter-label { font-size: 13px; color: var(--muted); min-width: 64px; letter-spacing: 1px; }
.chips { display: flex; gap: 10px; flex-wrap: wrap; }
.chip {
  padding: 8px 18px; border-radius: 999px; border: 1px solid var(--border-strong);
  background: rgba(255,255,255,.03); color: var(--muted); font-size: 14px; font-weight: 600;
  cursor: pointer; transition: .25s; font-family: inherit;
}
.chip:hover { color: var(--text); border-color: var(--cyan); }
.chip.active { background: var(--grad); border-color: transparent; color: #fff; box-shadow: 0 8px 22px -8px rgba(99,102,241,.7); }

/* ============ 产品卡片 ============ */
.product-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 22px; }
.product-card {
  position: relative; background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 26px; backdrop-filter: blur(12px); cursor: pointer; overflow: hidden;
  transition: transform .35s cubic-bezier(.2,.8,.2,1), border-color .35s, box-shadow .35s;
}
.product-card::after {
  content: ""; position: absolute; inset: 0; border-radius: var(--radius); padding: 1px;
  background: var(--grad); -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude; opacity: 0; transition: opacity .35s; pointer-events: none;
}
.product-card:hover { transform: translateY(-8px); box-shadow: var(--shadow); border-color: transparent; }
.product-card:hover::after { opacity: 1; }
.pc-top { display: flex; align-items: center; justify-content: space-between; margin-bottom: 18px; }
.pc-icon { width: 54px; height: 54px; border-radius: 14px; display: grid; place-items: center; background: var(--grad-soft); border: 1px solid var(--border-strong); color: var(--cyan); }
.pc-icon svg { width: 28px; height: 28px; }
.pc-tags { display: flex; gap: 8px; flex-wrap: wrap; justify-content: flex-end; }
.tag-pill { font-size: 11px; padding: 4px 10px; border-radius: 999px; font-weight: 700; letter-spacing: .5px; }
.tag-cat { color: #fff; }
.tag-aud { background: rgba(255,255,255,.1); color: var(--muted); }
.pc-name { font-size: 20px; font-weight: 700; margin-bottom: 6px; }
.pc-tagline { color: var(--cyan); font-size: 14px; margin-bottom: 12px; }
.pc-desc { color: var(--muted); font-size: 14px; min-height: 66px; }
.pc-foot { margin-top: 18px; display: flex; align-items: center; justify-content: space-between; }
.pc-more { font-size: 14px; color: var(--text); font-weight: 700; }
.pc-more svg { width: 16px; height: 16px; vertical-align: middle; margin-left: 4px; }

/* ============ 案例 ============ */
.case-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 20px; }
.case-card {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px;
  backdrop-filter: blur(10px); position: relative; overflow: hidden; transition: transform .3s, border-color .3s;
}
.case-card:hover { transform: translateY(-6px); border-color: var(--border-strong); }
.case-metric {
  position: absolute; top: 18px; right: 18px; font-family: "Orbitron", sans-serif; font-weight: 900; font-size: 18px;
  background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.case-cat { font-size: 12px; color: var(--cyan); letter-spacing: 1px; margin-bottom: 8px; }
.case-title { font-size: 17px; font-weight: 700; margin-bottom: 8px; padding-right: 80px; }
.case-desc { color: var(--muted); font-size: 14px; }

/* ============ 合作伙伴 ============ */
.partner-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 16px; }
.partner-card {
  background: var(--panel); border: 1px solid var(--border); border-radius: 14px; height: 96px;
  display: grid; place-items: center; font-weight: 700; font-size: 17px; letter-spacing: 1px;
  color: var(--muted); transition: .3s; position: relative; overflow: hidden;
}
.partner-card:hover { color: var(--text); transform: translateY(-4px); border-color: var(--border-strong); }
.partner-card::before { content: ""; position: absolute; inset: 0; background: var(--pc, var(--grad-soft)); opacity: 0; transition: opacity .3s; }
.partner-card span { position: relative; z-index: 1; }

/* ============ 联系我们 ============ */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: start; }
.contact-info { display: flex; flex-direction: column; gap: 16px; }
.contact-item { display: flex; gap: 14px; align-items: flex-start; background: var(--panel); border: 1px solid var(--border); border-radius: 14px; padding: 18px 20px; backdrop-filter: blur(10px); }
.contact-item .ci-ico { width: 40px; height: 40px; border-radius: 10px; background: var(--grad-soft); display: grid; place-items: center; color: var(--cyan); flex: none; }
.contact-item .ci-ico svg { width: 20px; height: 20px; }
.contact-item .ci-k { font-size: 13px; color: var(--muted); }
.contact-item .ci-v { font-size: 16px; font-weight: 600; }
.contact-form { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 26px; backdrop-filter: blur(10px); }
.field { margin-bottom: 14px; }
.field input, .field textarea {
  width: 100%; padding: 13px 16px; border-radius: 12px; border: 1px solid var(--border);
  background: rgba(255,255,255,.04); color: var(--text); font-family: inherit; font-size: 15px; resize: vertical;
  transition: border-color .25s;
}
.field input:focus, .field textarea:focus { outline: none; border-color: var(--cyan); }
.contact-form .btn { width: 100%; margin-top: 6px; }
.form-tip { font-size: 12px; color: var(--muted); margin-top: 10px; text-align: center; }

/* ============ 页脚 ============ */
.footer { position: relative; z-index: 2; border-top: 1px solid var(--border); margin-top: 40px; background: rgba(6,10,22,.6); }
.footer-inner { display: flex; flex-wrap: wrap; gap: 24px; align-items: center; justify-content: space-between; padding: 32px clamp(16px,4vw,40px); }
.footer-brand .logo-mark { font-size: 22px; }
.footer-brand p { font-size: 14px; color: var(--muted); margin-top: 6px; }
.footer-en { font-family: "Orbitron", sans-serif; font-size: 10px; letter-spacing: 2px; }
.footer-links { display: flex; gap: 22px; flex-wrap: wrap; }
.footer-links a { color: var(--muted); font-size: 14px; transition: color .25s; }
.footer-links a:hover { color: var(--text); }
.footer-copy { width: 100%; text-align: center; color: var(--muted); font-size: 12px; border-top: 1px solid var(--border); padding-top: 18px; margin-top: 8px; }

/* ============ 弹窗 ============ */
.modal { position: fixed; inset: 0; z-index: 100; display: none; }
.modal.open { display: block; }
.modal-backdrop { position: absolute; inset: 0; background: rgba(3,6,14,.75); backdrop-filter: blur(6px); animation: fade .3s; }
.modal-panel {
  position: relative; z-index: 1; max-width: 720px; margin: 6vh auto; max-height: 88vh; overflow-y: auto;
  background: var(--panel-solid); border: 1px solid var(--border-strong); border-radius: 22px; padding: 36px;
  box-shadow: var(--shadow); animation: pop .35s cubic-bezier(.2,.8,.2,1);
}
@keyframes fade { from { opacity: 0; } }
@keyframes pop { from { opacity: 0; transform: translateY(30px) scale(.97); } }
.modal-close { position: absolute; top: 16px; right: 18px; width: 38px; height: 38px; border-radius: 50%; border: 1px solid var(--border); background: rgba(255,255,255,.05); color: var(--text); font-size: 22px; cursor: pointer; line-height: 1; }
.modal-close:hover { background: rgba(255,255,255,.12); }
.m-hero { display: flex; align-items: center; gap: 16px; margin-bottom: 18px; }
.m-icon { width: 60px; height: 60px; border-radius: 16px; display: grid; place-items: center; background: var(--grad-soft); border: 1px solid var(--border-strong); color: var(--cyan); }
.m-icon svg { width: 32px; height: 32px; }
.m-title { font-size: 26px; font-weight: 700; }
.m-tagline { color: var(--cyan); font-size: 14px; }
.m-desc { color: #c6cff0; margin: 14px 0 22px; }
.m-section-t { font-family: "Orbitron", sans-serif; font-size: 13px; letter-spacing: 2px; color: var(--cyan); margin: 22px 0 12px; }
.m-feats { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.m-feat { display: flex; gap: 8px; align-items: center; background: rgba(255,255,255,.04); border: 1px solid var(--border); border-radius: 10px; padding: 10px 12px; font-size: 14px; }
.m-feat::before { content: "▹"; color: var(--cyan); }
.m-case { background: rgba(255,255,255,.03); border: 1px solid var(--border); border-radius: 12px; padding: 14px 16px; margin-bottom: 10px; }
.m-case .mc-top { display: flex; justify-content: space-between; gap: 12px; }
.m-case .mc-title { font-weight: 700; font-size: 15px; }
.m-case .mc-metric { color: var(--amber); font-family: "Orbitron", sans-serif; font-weight: 700; font-size: 14px; white-space: nowrap; }
.m-case .mc-desc { color: var(--muted); font-size: 13px; margin-top: 4px; }
.mc-play { margin-top: 12px; padding: 8px 16px; border-radius: 10px; border: 1px solid var(--cyan); background: rgba(34,211,238,.12); color: var(--cyan); font-weight: 700; font-family: inherit; cursor: pointer; transition: .2s; }
.mc-play:hover { background: rgba(34,211,238,.22); }

/* 短视频在线预览弹窗 */
.modal-video { max-width: 920px; background: #060a16; }
#videoBody { min-height: 120px; }
#videoBody video, #videoBody iframe { display: block; border-radius: 12px; background: #000; }

/* 案例卡片播放入口 */
.case-card.has-video { cursor: pointer; position: relative; overflow: hidden; }
.case-card.has-video:hover { border-color: var(--cyan); }
.case-thumb { height: 132px; margin: -18px -18px 12px; background-size: cover; background-position: center; border-radius: 16px 16px 0 0; }
.case-play { position: absolute; top: 12px; right: 12px; width: 34px; height: 34px; border-radius: 50%; display: grid; place-items: center; background: linear-gradient(135deg,#22d3ee,#a855f7); color: #fff; font-size: 14px; box-shadow: 0 8px 20px -8px #000; }
.case-vtag { display: inline-block; margin-left: 6px; padding: 1px 8px; border-radius: 999px; font-size: 11px; font-weight: 700; color: #fff; background: linear-gradient(135deg,#22d3ee,#a855f7); vertical-align: middle; }
.case-vbtn { margin-top: 12px; padding: 8px 16px; border-radius: 10px; border: 1px solid var(--cyan); background: rgba(34,211,238,.12); color: var(--cyan); font-weight: 700; font-family: inherit; cursor: pointer; }
/* 产品弹窗案例封面 */
.mc-thumb { height: 120px; margin-bottom: 10px; background-size: cover; background-position: center; border-radius: 10px; border: 1px solid var(--border); }

/* ============ 滚动揭示 ============ */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ============ 响应式 ============ */
@media (max-width: 900px) {
  .about-grid, .contact-grid { grid-template-columns: 1fr; }
  .about-stats { margin-top: 8px; }
}
@media (max-width: 760px) {
  .nav-links {
    position: fixed; top: 60px; right: 0; flex-direction: column; align-items: flex-start; gap: 4px;
    background: rgba(8,12,26,.96); backdrop-filter: blur(16px); padding: 18px 22px; border-radius: 0 0 0 18px;
    border: 1px solid var(--border); border-top: none; min-width: 200px; transform: translateX(110%); transition: transform .35s;
  }
  .nav-links.open { transform: translateX(0); }
  .nav-links a { width: 100%; padding: 10px 0; }
  .nav-toggle { display: flex; }
  .hero { min-height: 560px; }
  .m-feats { grid-template-columns: 1fr; }
  .about-vm { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .about-stats { grid-template-columns: 1fr; }
  .section { padding: 56px 0; }
}
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; }
}