/* ============================================================
   深圳市优立欧科技有限公司 · UUNIO.COM
   纯静态，零外部依赖（境内服务器不要引 Google Fonts / 境外 CDN）
   ============================================================ */

:root {
  --ink:      #0d1526;
  --ink-2:    #475569;
  --ink-3:    #8593a6;
  --line:     #e6ebf2;
  --bg:       #ffffff;
  --bg-soft:  #f6f8fb;
  --dark:     #0a0f1e;
  --dark-2:   #111a30;
  --blue:     #3b76e8;
  --cyan:     #2bbfb8;
  --grad:     linear-gradient(100deg, #5b8def 0%, #35c7c0 100%);
  --r:        14px;
  --wrap:     1160px;
  --ease:     cubic-bezier(.22,.61,.36,1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
               "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 28px; }

a { color: inherit; text-decoration: none; }
h1, h2, h3, h4 { margin: 0; font-weight: 700; line-height: 1.28; letter-spacing: -.01em; }
p  { margin: 0 0 1.1em; }
p:last-child { margin-bottom: 0; }
ul, ol, dl, dd { margin: 0; padding: 0; list-style: none; }

/* 待填占位：上线前全部替换完，删掉这条规则 */
.todo {
  background: #fff4cf; color: #8a6100;
  padding: 0 .35em; border-radius: 4px; font-weight: 600;
}

/* ---------- 滚动淡入 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity .7s var(--ease), transform .7s var(--ease);
}
.reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ============================================================
   顶栏
   ============================================================ */
.hdr {
  position: fixed; inset: 0 0 auto 0; z-index: 50;
  transition: background .3s var(--ease), border-color .3s var(--ease), backdrop-filter .3s;
  border-bottom: 1px solid transparent;
}
.hdr.solid {
  background: rgba(10,15,30,.82);
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  border-bottom-color: rgba(255,255,255,.08);
}

.hdr-in { display: flex; align-items: center; gap: 32px; height: 72px; }

.logo { display: flex; align-items: center; gap: 11px; }
.logo-mark { width: 34px; height: 34px; flex: none; border-radius: 9px; }
.logo-txt { display: flex; flex-direction: column; line-height: 1.15; }
.logo-txt b { font-size: 16.5px; color: #fff; letter-spacing: .02em; }
.logo-txt i {
  font-style: normal; font-size: 10.5px; letter-spacing: .26em;
  color: rgba(255,255,255,.5); font-weight: 600;
}

.nav { display: flex; gap: 34px; margin-left: auto; }
.nav a {
  font-size: 14.5px; color: rgba(255,255,255,.72); position: relative; padding: 3px 0;
  transition: color .2s;
}
.nav a::after {
  content: ''; position: absolute; left: 0; right: 100%; bottom: -2px; height: 1.5px;
  background: var(--grad); transition: right .3s var(--ease);
}
.nav a:hover { color: #fff; }
.nav a:hover::after { right: 0; }

.hdr-cta {
  font-size: 14px; font-weight: 600; color: #fff;
  padding: 8px 18px; border-radius: 999px;
  border: 1px solid rgba(255,255,255,.22);
  transition: background .2s, border-color .2s;
}
.hdr-cta:hover { background: rgba(255,255,255,.1); border-color: rgba(255,255,255,.4); }

/* ============================================================
   HERO
   ============================================================ */
.hero {
  position: relative;
  padding: 186px 0 0;
  background: var(--dark);
  color: #fff;
  overflow: hidden;
}

.hero-bg, .dark-bg { position: absolute; inset: 0; pointer-events: none; }

.grid-lines {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.045) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 90% 70% at 50% 25%, #000 25%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse 90% 70% at 50% 25%, #000 25%, transparent 78%);
}

.glow { position: absolute; border-radius: 50%; filter: blur(110px); opacity: .5; }
.glow-a { width: 620px; height: 480px; left: -140px; top: -150px; background: #2f6fe0; }
.glow-b { width: 540px; height: 420px; right: -120px; top: 40px;  background: #1c8f92; opacity: .38; }
.glow-c { width: 680px; height: 400px; left: 50%; top: -120px; transform: translateX(-50%); background: #2f6fe0; opacity: .3; }

.hero-in { position: relative; text-align: center; }

.pill {
  display: inline-block;
  font-size: 11px; font-weight: 700; letter-spacing: .22em;
  color: rgba(255,255,255,.72);
  padding: 7px 16px; border-radius: 999px;
  border: 1px solid rgba(255,255,255,.16);
  background: rgba(255,255,255,.04);
  margin-bottom: 30px;
}

.hero h1 {
  font-size: clamp(32px, 5.6vw, 60px);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -.02em;
  margin-bottom: 26px;
}

.grad {
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text;
  color: transparent;
}

.hero-sub {
  max-width: 620px; margin: 0 auto 38px;
  font-size: 16.5px; line-height: 1.9;
  color: rgba(255,255,255,.66);
}

.hero-act { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 28px; border-radius: 999px;
  font-size: 15px; font-weight: 600;
  border: 1px solid transparent;
  transition: transform .2s var(--ease), box-shadow .2s var(--ease), background .2s, border-color .2s;
}
.btn svg { width: 15px; height: 15px; transition: transform .25s var(--ease); }
.btn-main {
  background: var(--grad); color: #fff;
  box-shadow: 0 8px 24px -8px rgba(59,118,232,.75);
}
.btn-main:hover { transform: translateY(-2px); box-shadow: 0 14px 30px -10px rgba(59,118,232,.85); }
.btn-main:hover svg { transform: translateX(3px); }
.btn-line { color: #fff; border-color: rgba(255,255,255,.24); }
.btn-line:hover { background: rgba(255,255,255,.08); border-color: rgba(255,255,255,.45); }

/* 悬浮统计条 */
.stats {
  position: relative;
  display: grid; grid-template-columns: repeat(4, 1fr);
  margin: 92px 0 -58px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: 0 24px 60px -30px rgba(13,21,38,.32);
  overflow: hidden;
}
.stat { padding: 26px 20px; text-align: center; border-right: 1px solid var(--line); }
.stat:last-child { border-right: 0; }
.stat b {
  display: block; font-size: 30px; font-weight: 800; letter-spacing: -.02em;
  background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent;
  line-height: 1.2;
}
.stat span { display: block; font-size: 13.5px; color: var(--ink-3); margin-top: 4px; }

/* ============================================================
   通用区块
   ============================================================ */
.sec { padding: 132px 0 96px; position: relative; }
.sec-soft { background: var(--bg-soft); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); padding-top: 96px; }

.eyebrow {
  display: inline-block;
  font-size: 12.5px; font-weight: 700; letter-spacing: .16em;
  color: var(--blue); margin-bottom: 14px;
}
.eyebrow.light { color: #58c8e8; }

.sec-head { max-width: 680px; margin-bottom: 56px; }
.sec-head h2 { font-size: clamp(25px, 3.4vw, 37px); letter-spacing: -.02em; }
.sec-sub { margin-top: 16px; color: var(--ink-2); font-size: 16px; }

/* ============================================================
   关于我们
   ============================================================ */
.about { display: grid; grid-template-columns: 1.45fr 1fr; gap: 64px; align-items: start; }
.about-l h2 { font-size: clamp(25px, 3.4vw, 36px); margin-bottom: 26px; }
.about-l p { color: var(--ink-2); font-size: 15.8px; }

.info-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r);
  padding: 30px 28px;
  box-shadow: 0 18px 46px -32px rgba(13,21,38,.4);
  position: relative;
  overflow: hidden;
}
.info-card::before {
  content: ''; position: absolute; inset: 0 0 auto 0; height: 3px; background: var(--grad);
}
.info-card h3 { font-size: 15px; letter-spacing: .04em; color: var(--ink); margin-bottom: 18px; }
.info-card dl > div { padding: 13px 0; border-top: 1px solid var(--line); }
.info-card dl > div:first-of-type { border-top: 0; padding-top: 0; }
.info-card dt { font-size: 12.5px; color: var(--ink-3); letter-spacing: .06em; margin-bottom: 2px; }
.info-card dd { font-size: 15px; font-weight: 600; line-height: 1.6; }

/* ============================================================
   业务卡片
   ============================================================ */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(258px, 1fr)); gap: 22px; }

.card {
  position: relative;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r);
  padding: 32px 28px 30px;
  overflow: hidden;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease), border-color .3s;
}
.card::before {
  content: ''; position: absolute; inset: 0 0 auto 0; height: 3px;
  background: var(--grad);
  transform: scaleX(0); transform-origin: left;
  transition: transform .4s var(--ease);
}
.card:hover { transform: translateY(-5px); box-shadow: 0 26px 50px -30px rgba(13,21,38,.45); border-color: #d4ddea; }
.card:hover::before { transform: scaleX(1); }

.card-no {
  position: absolute; top: 24px; right: 26px;
  font-size: 13px; font-weight: 800; letter-spacing: .1em;
  color: #dde4ee;
}
.card-ico {
  width: 46px; height: 46px; border-radius: 12px;
  display: grid; place-items: center;
  background: linear-gradient(135deg, #eaf1fd 0%, #e4f6f4 100%);
  color: var(--blue);
  margin-bottom: 20px;
}
.card-ico svg { width: 23px; height: 23px; }
.card h3 { font-size: 17.5px; margin-bottom: 11px; }
.card p { font-size: 14.6px; line-height: 1.85; color: var(--ink-2); }

/* ============================================================
   服务链路（深色）
   ============================================================ */
.sec-dark {
  background: var(--dark);
  color: #fff;
  overflow: hidden;
  padding: 110px 0 104px;
}
.sec-dark .wrap { position: relative; }
.sec-dark .sec-sub { color: rgba(255,255,255,.6); }

.flow {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(196px, 1fr));
  gap: 26px;
}
.flow li {
  position: relative;
  padding-top: 26px;
  border-top: 1px solid rgba(255,255,255,.14);
}
.flow li::before {
  content: ''; position: absolute; top: -1px; left: 0; width: 34px; height: 2px;
  background: var(--grad);
}
.fno {
  display: block; font-size: 12.5px; font-weight: 800; letter-spacing: .14em;
  color: #58c8e8; margin-bottom: 10px;
}
.flow h4 { font-size: 16.5px; margin-bottom: 9px; }
.flow p { font-size: 14.2px; line-height: 1.85; color: rgba(255,255,255,.58); }

/* ============================================================
   联系我们
   ============================================================ */
.contact { display: grid; grid-template-columns: 1.25fr 1fr; gap: 48px; align-items: start; }

.c-list li {
  display: flex; gap: 16px; align-items: flex-start;
  padding: 19px 0; border-bottom: 1px solid var(--line);
}
.c-list li:first-child { padding-top: 0; }
.c-ico {
  flex: none; width: 38px; height: 38px; border-radius: 10px;
  display: grid; place-items: center;
  background: var(--bg-soft); color: var(--blue); border: 1px solid var(--line);
}
.c-ico svg { width: 18px; height: 18px; }
.c-k { display: block; font-size: 12.5px; color: var(--ink-3); letter-spacing: .06em; }
.c-v { display: block; font-size: 15.4px; font-weight: 600; line-height: 1.65; }
.c-link { transition: color .2s; }
.c-link:hover { color: var(--blue); }

.c-note {
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: var(--r);
  padding: 30px 28px;
}
.c-note h4 { font-size: 15px; margin-bottom: 9px; }
.c-note h4 + p { margin-bottom: 24px; }
.c-note h4:not(:first-child) { padding-top: 4px; }
.c-note p { font-size: 14.6px; line-height: 1.85; color: var(--ink-2); }

/* ============================================================
   页脚
   ============================================================ */
.ftr { background: var(--dark); color: rgba(255,255,255,.62); padding: 58px 0 42px; font-size: 14px; }
.ftr-top { display: flex; align-items: center; justify-content: space-between; gap: 30px; flex-wrap: wrap; }
.ftr-nav { display: flex; gap: 26px; flex-wrap: wrap; }
.ftr-nav a { color: rgba(255,255,255,.62); font-size: 14px; transition: color .2s; }
.ftr-nav a:hover { color: #fff; }

.ftr-line { height: 1px; background: rgba(255,255,255,.1); margin: 32px 0 26px; }

.ftr-bot { display: flex; flex-direction: column; align-items: center; gap: 12px; text-align: center; }
.ftr-co { color: #fff; font-weight: 600; font-size: 14.5px; margin: 0; }

.beian { display: flex; gap: 22px; flex-wrap: wrap; justify-content: center; align-items: center; }
.beian a { color: rgba(255,255,255,.62); transition: color .2s; }
.beian a:hover { color: #fff; }
.beian .gongan { display: inline-flex; align-items: center; gap: 6px; }

.ftr-cp { color: rgba(255,255,255,.34); font-size: 13px; margin: 2px 0 0; }

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1000px) {
  .about, .contact { grid-template-columns: 1fr; gap: 40px; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .stat:nth-child(2) { border-right: 0; }
  .stat:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
}

@media (max-width: 860px) {
  .nav { display: none; }
  .hdr-cta { margin-left: auto; }
  .hero { padding-top: 148px; }
  .sec { padding: 108px 0 78px; }
  .sec-soft, .sec-dark { padding: 82px 0 78px; }
}

@media (max-width: 560px) {
  .wrap { padding: 0 20px; }
  .hdr-in { height: 62px; }
  .hero { padding-top: 124px; }
  .hero-sub { font-size: 15.4px; }
  .stats { margin: 70px 0 -46px; }
  .stat { padding: 20px 12px; }
  .stat b { font-size: 24px; }
  .stat span { font-size: 12.5px; }
  .btn { padding: 12px 22px; font-size: 14.5px; }
  .ftr-top { flex-direction: column; align-items: flex-start; }
}