/* ============ 变量 ============ */
:root {
  --bg: #05070f;
  --bg-2: #080c1a;
  --bg-3: #0c1224;
  --card: rgba(255, 255, 255, .035);
  --line: rgba(140, 170, 255, .14);
  --line-2: rgba(140, 170, 255, .26);
  --txt: #e8eeff;
  --txt-2: #a3b0d4;
  --txt-3: #7482a8;
  --cy: #22d3ee;
  --bl: #3b82f6;
  --vi: #7c3aed;
  --pk: #f472b6;
  --radius: 18px;
  --nav-h: 70px;
  --max: 1200px;
  --shadow: 0 20px 50px rgba(0, 0, 0, .45);
  --glow: 0 0 0 1px rgba(34, 211, 238, .25), 0 18px 50px rgba(34, 211, 238, .12);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--txt-2);
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3, h4 { color: var(--txt); margin: 0; line-height: 1.32; font-weight: 700; }
p { margin: 0; }
ul { margin: 0; padding: 0; list-style: none; }
a { color: inherit; text-decoration: none; }
input, select, textarea { font-family: inherit; }

.container { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 24px; }

.grad {
  background: linear-gradient(100deg, var(--cy) 0%, var(--bl) 45%, var(--vi) 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}

/* ============ 按钮 ============ */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 13px 28px; border-radius: 999px;
  font-size: 15px; font-weight: 600; border: 1px solid transparent;
  cursor: pointer; transition: .25s ease;
}
.btn-primary {
  color: #04101c;
  background: linear-gradient(100deg, var(--cy), var(--bl));
  box-shadow: 0 10px 28px rgba(34, 211, 238, .28);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 16px 38px rgba(34, 211, 238, .4); }
.btn-outline { color: var(--txt); border-color: var(--line-2); background: rgba(255, 255, 255, .03); }
.btn-outline:hover { border-color: var(--cy); color: var(--cy); transform: translateY(-2px); }
.btn-sm { padding: 8px 18px; font-size: 14px; }
.btn-block { width: 100%; }

/* ============ 导航 ============ */
.nav {
  position: fixed; inset: 0 0 auto 0; height: var(--nav-h); z-index: 200;
  background: rgba(5, 7, 15, .6);
  backdrop-filter: blur(14px) saturate(160%);
  border-bottom: 1px solid transparent;
  transition: .3s ease;
}
.nav.on { background: rgba(5, 7, 15, .92); border-bottom-color: var(--line); box-shadow: 0 10px 30px rgba(0, 0, 0, .4); }
.nav-inner { height: var(--nav-h); display: flex; align-items: center; justify-content: space-between; }

.brand { display: flex; align-items: center; gap: 12px; }
.brand-logo {
  height: 42px; width: auto; display: block;
  filter: drop-shadow(0 0 14px rgba(34, 211, 238, .25));
  transition: filter .3s ease;
}
.brand:hover .brand-logo { filter: drop-shadow(0 0 18px rgba(34, 211, 238, .45)); }
.brand-sub {
  font-size: 13px; font-weight: 600; letter-spacing: 3px;
  color: var(--txt-2);
  border-left: 1px solid var(--line-2);
  padding-left: 12px;
}

.nav-menu { display: flex; align-items: center; gap: 30px; }
.nav-menu a { font-size: 15px; color: var(--txt-2); transition: color .2s ease; }
.nav-menu a:not(.btn):hover { color: var(--cy); }
.nav-menu a.btn-primary, .nav-menu a.btn-primary:hover { color: #04101c; }

.nav-toggle { display: none; width: 40px; height: 40px; border: 0; background: none; cursor: pointer; flex-direction: column; justify-content: center; gap: 5px; }
.nav-toggle span { display: block; height: 2px; background: var(--txt); border-radius: 2px; transition: .25s ease; }
.nav-toggle.on span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.on span:nth-child(2) { opacity: 0; }
.nav-toggle.on span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============ Hero ============ */
.hero { position: relative; padding: calc(var(--nav-h) + 96px) 0 90px; overflow: hidden; }
.hero-canvas { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero-glow {
  position: absolute; inset: 0; pointer-events: none;
  background:
    radial-gradient(700px 400px at 18% 10%, rgba(34, 211, 238, .22), transparent 60%),
    radial-gradient(700px 420px at 82% 8%, rgba(124, 58, 237, .24), transparent 62%),
    radial-gradient(900px 500px at 50% 100%, rgba(59, 130, 246, .16), transparent 60%);
}
.hero-grid {
  position: absolute; inset: 0; pointer-events: none;
  background-image: linear-gradient(rgba(120, 160, 255, .07) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(120, 160, 255, .07) 1px, transparent 1px);
  background-size: 52px 52px;
  mask-image: radial-gradient(ellipse at 50% 40%, #000 25%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at 50% 40%, #000 25%, transparent 75%);
}

.hero-inner { position: relative; text-align: center; }
.chip {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 7px 16px; border-radius: 999px;
  font-size: 13px; color: var(--cy);
  border: 1px solid rgba(34, 211, 238, .32);
  background: rgba(34, 211, 238, .08);
  backdrop-filter: blur(6px);
}
.pulse-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--cy); box-shadow: 0 0 0 0 rgba(34, 211, 238, .6); animation: pulse 2s infinite; }
@keyframes pulse {
  70% { box-shadow: 0 0 0 10px rgba(34, 211, 238, 0); }
  100% { box-shadow: 0 0 0 0 rgba(34, 211, 238, 0); }
}

.hero h1 { font-size: 58px; letter-spacing: -1px; margin: 26px 0 22px; }
.hero-desc { max-width: 720px; margin: 0 auto; font-size: 17px; color: var(--txt-2); }
.hero-actions { display: flex; justify-content: center; gap: 14px; margin: 34px 0 26px; flex-wrap: wrap; }
.hero-techs { display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; }
.hero-techs span {
  padding: 7px 16px; border-radius: 10px; font-size: 13.5px;
  color: var(--txt-2); border: 1px solid var(--line);
  background: rgba(255, 255, 255, .03);
  backdrop-filter: blur(6px);
}

.metrics {
  position: relative; margin-top: 66px;
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px;
  padding: 26px 22px;
  border: 1px solid var(--line); border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(255, 255, 255, .05), rgba(255, 255, 255, .015));
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow);
}
.metric { text-align: center; }
.metric b {
  display: block; font-size: 34px; font-weight: 800;
  background: linear-gradient(100deg, var(--cy), var(--vi));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.metric span { font-size: 14px; color: var(--txt-3); }

/* ============ 通用区块 ============ */
.section { position: relative; padding: 104px 0; }
.section-2 { background: linear-gradient(180deg, var(--bg-2), var(--bg)); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }

.head { max-width: 760px; margin: 0 auto 54px; text-align: center; }
.eyebrow {
  display: inline-block; font-size: 12.5px; font-weight: 700; letter-spacing: 3px;
  text-transform: uppercase; color: var(--cy); margin-bottom: 12px;
}
.head h2 { font-size: 36px; margin-bottom: 16px; }
.head p { color: var(--txt-3); font-size: 16px; }

/* ============ 产品矩阵 ============ */
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }

.prod {
  position: relative; display: block;
  padding: 28px 24px;
  border: 1px solid var(--line); border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(255, 255, 255, .045), rgba(255, 255, 255, .012));
  overflow: hidden;
  transition: .35s ease;
}
.prod::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(420px 200px at var(--mx, 50%) var(--my, 0%), rgba(34, 211, 238, .16), transparent 70%);
  opacity: 0; transition: opacity .35s ease;
}
.prod:hover { transform: translateY(-8px); border-color: var(--line-2); box-shadow: var(--glow); }
.prod:hover::before { opacity: 1; }
.prod-top { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; }
.prod-ic { font-size: 26px; }
.prod-tag {
  font-size: 12px; letter-spacing: 1px; color: var(--cy);
  padding: 3px 10px; border-radius: 999px;
  border: 1px solid rgba(34, 211, 238, .3); background: rgba(34, 211, 238, .08);
}
.prod h3 { font-size: 20px; margin-bottom: 10px; }
.prod p { font-size: 14.5px; color: var(--txt-3); min-height: 78px; }
.prod-list { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0 18px; }
.prod-list li { font-size: 12.5px; padding: 4px 10px; border-radius: 8px; background: rgba(255, 255, 255, .05); color: var(--txt-2); border: 1px solid var(--line); }
.prod-more { font-size: 14px; color: var(--cy); font-weight: 600; }
.prod:hover .prod-more::after { content: " →"; }

/* ============ 解决方案 Tabs ============ */
.tab-nav { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin-bottom: 32px; }
.tab-btn {
  padding: 10px 22px; border-radius: 999px; cursor: pointer;
  font-size: 14.5px; font-weight: 600; color: var(--txt-2);
  background: rgba(255, 255, 255, .04); border: 1px solid var(--line);
  transition: .25s ease;
}
.tab-btn:hover { color: var(--cy); border-color: rgba(34, 211, 238, .45); }
.tab-btn.active {
  color: #04101c; border-color: transparent;
  background: linear-gradient(100deg, var(--cy), var(--bl));
  box-shadow: 0 10px 26px rgba(34, 211, 238, .26);
}
.tab-panel { display: none; }
.tab-panel.active { display: block; animation: fadeUp .5s ease both; }
@keyframes fadeUp { from { opacity: 0; transform: translateY(16px); } to { opacity: 1; transform: none; } }

.sol {
  display: grid; grid-template-columns: 1.4fr .8fr; gap: 34px;
  padding: 38px 34px; border-radius: var(--radius);
  border: 1px solid var(--line);
  background: linear-gradient(135deg, rgba(34, 211, 238, .06), rgba(124, 58, 237, .06));
  box-shadow: var(--shadow);
}
.sol h3 { font-size: 24px; margin-bottom: 12px; }
.sol-copy p { color: var(--txt-3); font-size: 15.5px; margin-bottom: 20px; }
.check { display: flex; flex-direction: column; gap: 12px; }
.check li { position: relative; padding-left: 28px; font-size: 15px; }
.check li::before {
  content: "✓"; position: absolute; left: 0; top: 3px;
  width: 20px; height: 20px; display: grid; place-items: center;
  font-size: 12px; font-weight: 700; color: #04101c; border-radius: 50%;
  background: linear-gradient(135deg, var(--cy), var(--bl));
}
.sol-side { display: flex; flex-direction: column; gap: 14px; }
.sol-num {
  padding: 18px 20px; border-radius: 14px;
  border: 1px solid var(--line); background: rgba(255, 255, 255, .04);
}
.sol-num b { display: block; font-size: 26px; color: var(--txt); }
.sol-num span { font-size: 13px; color: var(--txt-3); }

/* ============ 技术能力 ============ */
.tech-card {
  padding: 30px 26px; border-radius: var(--radius);
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(255, 255, 255, .045), rgba(255, 255, 255, .012));
  transition: .35s ease;
}
.tech-card:hover { transform: translateY(-6px); border-color: var(--line-2); box-shadow: var(--glow); }
.tech-ic {
  width: 54px; height: 54px; display: grid; place-items: center; font-size: 24px;
  border-radius: 15px; margin-bottom: 18px;
  background: linear-gradient(135deg, rgba(34, 211, 238, .16), rgba(124, 58, 237, .16));
  border: 1px solid var(--line);
}
.tech-card h3 { font-size: 19px; margin-bottom: 10px; }
.tech-card > p { font-size: 14.5px; color: var(--txt-3); }
.bar-group { margin-top: 18px; display: flex; flex-direction: column; gap: 12px; }
.bar-item { display: grid; grid-template-columns: 88px 1fr; align-items: center; gap: 12px; font-size: 13px; color: var(--txt-3); }
.bar-item i {
  display: block; height: 6px; border-radius: 999px; background: rgba(255, 255, 255, .08);
  position: relative; overflow: hidden;
}
.bar-item i::after {
  content: ""; position: absolute; inset: 0; width: var(--w);
  border-radius: 999px; background: linear-gradient(90deg, var(--cy), var(--vi));
  animation: fill 1.2s ease both;
}
@keyframes fill { from { width: 0; } }

.stack { margin-top: 46px; text-align: center; }
.stack h3 { font-size: 18px; margin-bottom: 20px; }
.stack-items { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; }
.stack-items span {
  padding: 9px 18px; border-radius: 10px; font-size: 13.5px; color: var(--txt-2);
  border: 1px solid var(--line); background: rgba(255, 255, 255, .035);
  transition: .25s ease;
}
.stack-items span:hover { color: var(--cy); border-color: rgba(34, 211, 238, .4); transform: translateY(-3px); }

/* ============ 客户案例 ============ */
.cases { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.case {
  padding: 26px 24px; border-radius: var(--radius);
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(255, 255, 255, .045), rgba(255, 255, 255, .012));
  transition: .35s ease;
}
.case:hover { transform: translateY(-6px); border-color: var(--line-2); box-shadow: var(--glow); }
.case-ind {
  display: inline-block; font-size: 12px; letter-spacing: 1px; color: var(--pk);
  padding: 3px 10px; border-radius: 999px; margin-bottom: 12px;
  border: 1px solid rgba(244, 114, 182, .3); background: rgba(244, 114, 182, .08);
}
.case h3 { font-size: 18px; margin-bottom: 10px; }
.case p { font-size: 14px; color: var(--txt-3); min-height: 84px; }
.case-num { padding-top: 14px; border-top: 1px dashed var(--line); }
.case-num b { font-size: 24px; color: var(--cy); }
.case-num span { font-size: 12.5px; color: var(--txt-3); margin-left: 8px; }

.logos { margin-top: 44px; display: flex; flex-wrap: wrap; gap: 14px; justify-content: center; }
.logos span {
  padding: 12px 26px; border-radius: 12px; font-size: 13px; letter-spacing: 2px;
  color: var(--txt-3); border: 1px solid var(--line); background: rgba(255, 255, 255, .03);
  filter: grayscale(1); opacity: .7; transition: .3s ease;
}
.logos span:hover { filter: none; opacity: 1; color: var(--txt); border-color: var(--line-2); }

/* ============ 交付流程 ============ */
.flow { display: grid; grid-template-columns: repeat(6, 1fr); gap: 16px; }
.flow-step {
  position: relative; padding: 24px 20px; border-radius: var(--radius);
  border: 1px solid var(--line); background: rgba(255, 255, 255, .035);
  transition: .3s ease;
}
.flow-step:hover { transform: translateY(-6px); border-color: var(--line-2); box-shadow: var(--glow); }
.flow-step span {
  display: block; font-size: 22px; font-weight: 800; margin-bottom: 8px;
  background: linear-gradient(100deg, var(--cy), var(--vi));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.flow-step b { display: block; font-size: 16px; color: var(--txt); margin-bottom: 6px; }
.flow-step p { font-size: 13.5px; color: var(--txt-3); }

/* ============ 关于我们 ============ */
.about { display: grid; grid-template-columns: 1.15fr .85fr; gap: 44px; align-items: start; }
.about-copy h2 { font-size: 30px; margin: 12px 0 18px; }
.about-copy p { font-size: 15.5px; color: var(--txt-3); margin-bottom: 14px; }
.about-items { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 24px; }
.about-item {
  padding: 16px 18px; border-radius: 14px;
  border: 1px solid var(--line); background: rgba(255, 255, 255, .035);
}
.about-item b { display: block; font-size: 15px; color: var(--cy); margin-bottom: 4px; }
.about-item span { font-size: 13.5px; color: var(--txt-3); }
.about-side { display: flex; flex-direction: column; gap: 18px; }
.info-card {
  padding: 26px 24px; border-radius: var(--radius);
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(255, 255, 255, .05), rgba(255, 255, 255, .012));
}
.info-card h3 { font-size: 17px; margin-bottom: 14px; }
.info-list { display: flex; flex-direction: column; gap: 11px; }
.info-list li { position: relative; padding-left: 20px; font-size: 14.5px; color: var(--txt-3); }
.info-list li::before {
  content: ""; position: absolute; left: 0; top: 11px;
  width: 8px; height: 8px; border-radius: 50%;
  background: linear-gradient(135deg, var(--cy), var(--vi));
}

/* ============ 联系 ============ */
.cta-sec { background: linear-gradient(180deg, var(--bg-3), var(--bg)); border-top: 1px solid var(--line); }
.cta-wrap { display: grid; grid-template-columns: 1fr .8fr; gap: 46px; align-items: center; }
.cta-copy h2 { font-size: 30px; margin: 12px 0 16px; }
.cta-copy p { color: var(--txt-3); font-size: 15.5px; }
.contact-list { margin-top: 26px; display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.contact-item {
  padding: 16px 18px; border-radius: 14px;
  border: 1px solid var(--line); background: rgba(255, 255, 255, .035);
}
.contact-item span { display: block; font-size: 12.5px; color: var(--txt-3); margin-bottom: 4px; }
.contact-item b { font-size: 14.5px; color: var(--txt); font-weight: 600; }

.cta-form {
  padding: 32px 28px; border-radius: var(--radius);
  border: 1px solid var(--line-2);
  background: linear-gradient(180deg, rgba(34, 211, 238, .07), rgba(124, 58, 237, .05));
  box-shadow: var(--shadow);
}
.field { margin-bottom: 16px; }
.field label { display: block; font-size: 13px; font-weight: 600; color: var(--txt-2); margin-bottom: 6px; }
.field input, .field select, .field textarea {
  width: 100%; padding: 12px 14px; font-size: 14.5px;
  color: var(--txt); background: rgba(5, 7, 15, .6);
  border: 1px solid var(--line); border-radius: 12px; outline: none;
  transition: .22s ease;
}
.field input::placeholder, .field textarea::placeholder { color: #55628a; }
.field select option { background: #0b1020; }
.field input:focus, .field select:focus, .field textarea:focus {
  border-color: var(--cy); box-shadow: 0 0 0 3px rgba(34, 211, 238, .14);
}
.field textarea { resize: vertical; }
.form-tip { margin-top: 12px; font-size: 12.5px; color: var(--txt-3); text-align: center; }
.form-tip.ok { color: #34d399; font-weight: 600; }

/* ============ 页脚 ============ */
.footer { border-top: 1px solid var(--line); background: #04060d; padding: 56px 0 26px; }
.footer-top { display: grid; grid-template-columns: 1.1fr 2fr; gap: 40px; padding-bottom: 32px; border-bottom: 1px solid var(--line); }
.footer-brand p { margin-top: 16px; font-size: 13.5px; color: var(--txt-3); max-width: 380px; }
.footer-nav { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.footer-nav h4 { font-size: 15px; margin-bottom: 12px; }
.footer-nav a { display: block; font-size: 13.5px; color: var(--txt-3); padding: 4px 0; transition: .2s ease; }
.footer-nav a:hover { color: var(--cy); }
.footer-bottom {
  padding-top: 22px; display: flex; flex-wrap: wrap; gap: 10px 24px;
  justify-content: space-between; align-items: center;
  font-size: 13px; color: var(--txt-3);
}
.icp { letter-spacing: .5px; }

/* ============ 动画 ============ */
.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: 1024px) {
  .hero h1 { font-size: 44px; }
  .grid-4, .cases { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .sol { grid-template-columns: 1fr; }
  .flow { grid-template-columns: repeat(3, 1fr); }
  .about { grid-template-columns: 1fr; }
  .cta-wrap { grid-template-columns: 1fr; gap: 32px; }
  .footer-top { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  .nav-menu {
    position: fixed; top: var(--nav-h); left: 0; right: 0;
    flex-direction: column; align-items: flex-start; gap: 4px;
    padding: 14px 24px 22px;
    background: rgba(6, 9, 20, .98);
    border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow);
    transform: translateY(-12px); opacity: 0; pointer-events: none; transition: .25s ease;
  }
  .nav-menu.on { transform: none; opacity: 1; pointer-events: auto; }
  .nav-menu a { width: 100%; padding: 10px 0; }
  .nav-menu .btn { margin-top: 8px; width: 100%; }

  .section { padding: 68px 0; }
  .head h2 { font-size: 27px; }
  .hero { padding: calc(var(--nav-h) + 56px) 0 64px; }
  .hero h1 { font-size: 32px; }
  .hero-desc { font-size: 15.5px; }
  .metrics { grid-template-columns: repeat(2, 1fr); gap: 22px 12px; }
  .metric b { font-size: 26px; }
  .grid-4, .cases, .grid-3 { grid-template-columns: 1fr; }
  .flow { grid-template-columns: 1fr; }
  .about-items { grid-template-columns: 1fr; }
  .contact-list { grid-template-columns: 1fr; }
  .prod p, .case p { min-height: 0; }
  .footer-nav { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
}