/* ============================================
   安徽数创源科技有限公司 官网
   深色工程感设计系统
   ============================================ */

:root {
  /* 色板 — 品牌蓝色系 */
  --bg: #060B16;
  --bg-soft: #0A1120;
  --panel: #0D1526;
  --panel-2: #121C33;
  --border: #1F2C49;
  --border-soft: #17223B;
  --signal: #2E8BFF;
  --signal-dim: rgba(46, 139, 255, .12);
  --pass: #35D0BA;
  --text: #F2F6FC;
  --muted: #9AA8BF;
  --faint: #5D6B84;

  /* 字体 */
  --font-display: "Bricolage Grotesque", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "Space Mono", "JetBrains Mono", ui-monospace, "PingFang SC", "Microsoft YaHei", monospace;

  /* 动效 */
  --ease-reveal: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-standard: cubic-bezier(0.4, 0, 0.2, 1);

  /* 圆角 */
  --r-xs: 4px;
  --r-sm: 8px;
  --r-md: 12px;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

::selection { background: rgba(46, 139, 255, .28); color: #fff; }

/* 滚动条 */
::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: #24344F; border-radius: 5px; }
::-webkit-scrollbar-thumb:hover { background: #31456B; }

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

.wrap { max-width: 1200px; margin: 0 auto; padding: 0 32px; }

/* ============ 通用：章节编号标记 ============ */
.marker {
  display: flex;
  align-items: center;
  gap: 14px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .22em;
  color: var(--signal);
  text-transform: uppercase;
  margin-bottom: 28px;
}
.marker::after {
  content: "";
  flex: 0 0 64px;
  height: 1px;
  background: linear-gradient(90deg, var(--signal), transparent);
}

h2.sec-title {
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.25;
  max-width: 20ch;
  margin-bottom: 18px;
}

.sec-desc { color: var(--muted); max-width: 62ch; font-size: 16.5px; }

section { padding: 110px 0; position: relative; }

/* ============ 显现动画 ============ */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity .56s var(--ease-reveal), transform .56s var(--ease-reveal);
  transition-delay: calc(var(--i, 0) * 70ms);
}
.reveal[data-revealed] { opacity: 1; transform: none; }

/* ============ 导航 ============ */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  transition: background .3s var(--ease-standard), border-color .3s var(--ease-standard);
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  background: rgba(10, 11, 13, .82);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border-bottom-color: var(--border-soft);
}
.nav__inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 32px;
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand__mark {
  width: 34px; height: 34px;
  border-radius: var(--r-sm);
  background: linear-gradient(135deg, var(--signal), #1D5FBF);
  display: grid; place-items: center;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 15px;
  color: #04101F;
}
.brand__name { font-family: var(--font-display); font-weight: 700; font-size: 17px; letter-spacing: .02em; }
.brand__name small {
  display: block;
  font-family: var(--font-mono);
  font-weight: 400;
  font-size: 10px;
  letter-spacing: .3em;
  color: var(--faint);
}
.nav__links { display: flex; align-items: center; gap: 34px; }
.nav__links a {
  font-size: 14px;
  color: var(--muted);
  transition: color .2s var(--ease-standard);
  position: relative;
}
.nav__links a:hover { color: var(--text); }
.nav__links a.active { color: var(--signal); }
.nav__cta {
  font-family: var(--font-mono);
  font-size: 13px;
  padding: 9px 20px;
  border-radius: 100px;
  border: 1px solid var(--signal);
  color: var(--signal) !important;
  transition: background .2s, color .2s;
}
.nav__cta:hover { background: var(--signal); color: #04101F !important; }
.nav__burger { display: none; background: none; border: none; cursor: pointer; padding: 8px; }
.nav__burger span { display: block; width: 22px; height: 2px; background: var(--text); margin: 5px 0; transition: .3s; }

/* ============ Hero ============ */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 140px 0 90px;
  position: relative;
  overflow: hidden;
}
/* 网格平移背景 */
.hero__grid {
  position: absolute;
  inset: -64px;
  background-image:
    linear-gradient(rgba(255, 255, 255, .035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .035) 1px, transparent 1px);
  background-size: 64px 64px;
  animation: grid-pan 38s linear infinite;
  mask-image: radial-gradient(ellipse 90% 80% at 50% 40%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 90% 80% at 50% 40%, #000 30%, transparent 75%);
  pointer-events: none;
}
@keyframes grid-pan { to { background-position: 64px 64px; } }

.hero__glow {
  position: absolute;
  top: -20%;
  right: -10%;
  width: 720px;
  height: 720px;
  background: radial-gradient(circle, rgba(46, 139, 255, .09) 0%, transparent 62%);
  pointer-events: none;
}
.hero__glow2 {
  position: absolute;
  bottom: -30%;
  left: -15%;
  width: 640px;
  height: 640px;
  background: radial-gradient(circle, rgba(53, 208, 186, .07) 0%, transparent 60%);
  pointer-events: none;
}

.hero__inner {
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: 72px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero__tag {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .12em;
  color: var(--signal);
  border: 1px solid rgba(46, 139, 255, .35);
  background: var(--signal-dim);
  padding: 7px 16px;
  border-radius: 100px;
  margin-bottom: 30px;
}
.hero__tag .dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--signal);
  animation: dot-pulse 2s ease-in-out infinite;
}
@keyframes dot-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(46, 139, 255, .5); }
  50% { box-shadow: 0 0 0 5px rgba(46, 139, 255, 0); }
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(34px, 4.6vw, 58px);
  font-weight: 800;
  line-height: 1.22;
  letter-spacing: -0.015em;
  margin-bottom: 26px;
}
.hero h1 .hl {
  background: linear-gradient(100deg, var(--signal) 10%, #8FC2FF 90%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero__sub {
  color: var(--muted);
  font-size: 17px;
  max-width: 52ch;
  margin-bottom: 40px;
}

.hero__actions { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 52px; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 15px;
  font-weight: 600;
  padding: 14px 30px;
  border-radius: 100px;
  transition: all .25s var(--ease-standard);
  cursor: pointer;
}
.btn svg { transition: transform .25s var(--ease-standard); }
.btn:hover svg { transform: translateX(4px); }
.btn--primary {
  background: var(--signal);
  color: #04101F;
  animation: cta-breathe 3.4s ease-in-out infinite;
}
.btn--primary:hover { background: #6FB2FF; }
@keyframes cta-breathe {
  0%, 100% { box-shadow: 0 0 0 0 rgba(46, 139, 255, 0); }
  50% { box-shadow: 0 0 0 7px rgba(46, 139, 255, .16); }
}
.btn--ghost {
  border: 1px solid var(--border);
  color: var(--text);
  background: transparent;
}
.btn--ghost:hover { border-color: var(--faint); background: rgba(255, 255, 255, .03); }

.hero__stats {
  display: flex;
  gap: 44px;
  flex-wrap: wrap;
}
.hstat__num {
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.1;
}
.hstat__num em { font-style: normal; color: var(--signal); font-size: 18px; margin-left: 2px; }
.hstat__label { font-size: 13px; color: var(--faint); margin-top: 6px; }

/* ---- Hero 数据看板 ---- */
.hero__board { position: relative; animation: float-y 7s ease-in-out infinite; }
@keyframes float-y {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}
.board {
  background: rgba(18, 19, 22, .72);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  overflow: hidden;
  box-shadow: 0 30px 80px rgba(0, 0, 0, .5);
}
.board__bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 13px 18px;
  border-bottom: 1px solid var(--border-soft);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--faint);
  letter-spacing: .08em;
}
.board__bar .dots { display: flex; gap: 6px; }
.board__bar .dots i { width: 9px; height: 9px; border-radius: 50%; background: #233252; }
.board__bar .dots i:first-child { background: rgba(46, 139, 255, .6); }
.board__body { padding: 22px; display: grid; grid-template-columns: auto 1fr; gap: 24px; align-items: center; }

.dial { position: relative; width: 148px; height: 148px; animation: dial-pulse 3s ease-in-out infinite; }
@keyframes dial-pulse {
  0%, 100% { filter: drop-shadow(0 0 14px rgba(46, 139, 255, .16)); }
  50% { filter: drop-shadow(0 0 22px rgba(46, 139, 255, .3)); }
}
.dial svg { transform: rotate(-90deg); }
.dial__track { stroke: #1B2740; }
.dial__val { stroke: var(--signal); stroke-linecap: round; }
.dial__center {
  position: absolute; inset: 0;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
}
.dial__score { font-family: var(--font-mono); font-size: 34px; font-weight: 700; line-height: 1; }
.dial__lbl { font-size: 11px; color: var(--faint); margin-top: 6px; letter-spacing: .1em; }

.board__metrics { display: flex; flex-direction: column; gap: 14px; }
.bm { display: flex; flex-direction: column; gap: 5px; }
.bm__top { display: flex; justify-content: space-between; font-size: 12.5px; }
.bm__top b { font-family: var(--font-mono); color: var(--muted); font-weight: 400; }
.bm__top span { font-family: var(--font-mono); color: var(--text); }
.bm__bar { height: 5px; background: #152035; border-radius: 3px; overflow: hidden; }
.bm__fill {
  height: 100%;
  width: 0;
  border-radius: 3px;
  background: linear-gradient(90deg, #1D5FBF, var(--signal));
  transition: width 1.1s var(--ease-reveal);
}
.bm__fill--blue { background: linear-gradient(90deg, #1E8F7F, var(--pass)); }

.board__foot {
  display: flex;
  justify-content: space-between;
  padding: 14px 22px;
  border-top: 1px solid var(--border-soft);
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--faint);
  letter-spacing: .05em;
}
.board__foot .ok { color: var(--pass); }

/* 漂浮小卡片 */
.chip-float {
  position: absolute;
  font-family: var(--font-mono);
  font-size: 12px;
  background: rgba(18, 19, 22, .85);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  padding: 10px 16px;
  box-shadow: 0 16px 40px rgba(0, 0, 0, .45);
}
.chip-float b { color: var(--signal); font-weight: 700; }
.chip-float--a { top: -22px; right: 6%; animation: float-y 6s ease-in-out infinite 1s; }
.chip-float--b { bottom: -20px; left: -4%; animation: float-y 8s ease-in-out infinite .5s; }

/* ============ 跑马灯 ============ */
.marquee-band {
  border-top: 1px solid var(--border-soft);
  border-bottom: 1px solid var(--border-soft);
  padding: 20px 0;
  overflow: hidden;
  background: var(--bg-soft);
}
.marquee { display: flex; width: max-content; animation: marquee 32s linear infinite; will-change: transform; }
.marquee span {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: .16em;
  color: var(--faint);
  padding: 0 34px;
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 34px;
}
.marquee span::after { content: "◆"; color: var(--signal); font-size: 9px; }
@keyframes marquee { to { transform: translateX(-50%); } }

/* ============ 业务体系 ============ */
.svc-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border-soft);
  border: 1px solid var(--border-soft);
  border-radius: var(--r-md);
  overflow: hidden;
  margin-top: 56px;
}
.svc {
  background: var(--panel);
  padding: 34px 30px 28px;
  position: relative;
  transition: background .3s var(--ease-standard);
}
.svc:hover { background: var(--panel-2); }
.svc__idx {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--signal);
  letter-spacing: .18em;
  margin-bottom: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.svc__idx svg { width: 26px; height: 26px; stroke: var(--faint); stroke-width: 1.5; fill: none; transition: stroke .3s; }
.svc:hover .svc__idx svg { stroke: var(--signal); }
.svc h3 { font-size: 19px; font-weight: 700; margin-bottom: 10px; }
.svc p { font-size: 14px; color: var(--muted); line-height: 1.75; }
.svc__tag {
  display: inline-block;
  margin-top: 18px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--faint);
  border: 1px solid var(--border);
  border-radius: 100px;
  padding: 4px 12px;
}

/* ============ 数据专区 ============ */
.zone { background: var(--bg-soft); border-top: 1px solid var(--border-soft); border-bottom: 1px solid var(--border-soft); }
.zone__inner { display: grid; grid-template-columns: 1fr 1fr; gap: 72px; align-items: center; }
.zone__list { margin-top: 34px; display: flex; flex-direction: column; }
.zl {
  display: flex;
  gap: 18px;
  padding: 18px 0;
  border-bottom: 1px solid var(--border-soft);
  align-items: baseline;
}
.zl:first-child { border-top: 1px solid var(--border-soft); }
.zl__no { font-family: var(--font-mono); font-size: 13px; color: var(--signal); flex: 0 0 34px; }
.zl b { font-size: 15.5px; font-weight: 600; display: block; margin-bottom: 3px; }
.zl p { font-size: 13.5px; color: var(--faint); }

.zone__panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 30px;
}
.zone__panel h4 {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--faint);
  margin-bottom: 24px;
  font-weight: 400;
}
.flow-node {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 15px 18px;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  background: var(--bg-soft);
  margin-bottom: 12px;
  transition: border-color .3s;
}
.flow-node:hover { border-color: rgba(46, 139, 255, .4); }
.flow-node__icon {
  width: 38px; height: 38px;
  flex: 0 0 38px;
  border-radius: var(--r-xs);
  background: var(--signal-dim);
  display: grid; place-items: center;
}
.flow-node__icon svg { width: 20px; height: 20px; stroke: var(--signal); stroke-width: 1.5; fill: none; }
.flow-node b { font-size: 14.5px; display: block; }
.flow-node span { font-size: 12px; color: var(--faint); font-family: var(--font-mono); }
.flow-arrow { text-align: center; color: var(--faint); margin: -4px 0 8px; font-size: 14px; }

/* ============ 服务流程 ============ */
.steps { margin-top: 60px; display: grid; grid-template-columns: repeat(5, 1fr); gap: 0; position: relative; }
.steps::before {
  content: "";
  position: absolute;
  top: 27px; left: 8%; right: 8%;
  height: 1px;
  background: repeating-linear-gradient(90deg, var(--border) 0 8px, transparent 8px 16px);
}
.step { text-align: center; padding: 0 14px; position: relative; }
.step__no {
  width: 54px; height: 54px;
  margin: 0 auto 20px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--panel);
  display: grid; place-items: center;
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--signal);
  position: relative;
  z-index: 1;
  transition: all .3s var(--ease-standard);
}
.step:hover .step__no {
  border-color: var(--signal);
  box-shadow: 0 0 0 6px rgba(46, 139, 255, .1);
}
.step b { font-size: 16px; display: block; margin-bottom: 8px; }
.step p { font-size: 13px; color: var(--faint); line-height: 1.7; }

/* ============ 生态合作 ============ */
.eco { background: var(--bg-soft); border-top: 1px solid var(--border-soft); border-bottom: 1px solid var(--border-soft); }
.eco-grid { margin-top: 52px; display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.eco-item {
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 28px 30px;
  background: var(--panel);
  display: flex;
  gap: 20px;
  align-items: flex-start;
  transition: border-color .3s;
}
.eco-item:hover { border-color: rgba(46, 139, 255, .35); }
.eco-item__k {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--signal);
  letter-spacing: .14em;
  flex: 0 0 auto;
  border: 1px solid rgba(46, 139, 255, .3);
  border-radius: 100px;
  padding: 5px 14px;
  margin-top: 2px;
}
.eco-item b { font-size: 16px; display: block; margin-bottom: 6px; }
.eco-item p { font-size: 13.5px; color: var(--muted); }

/* ============ 关于 ============ */
.about__inner { display: grid; grid-template-columns: 1.1fr .9fr; gap: 72px; align-items: start; }
.about__text p { color: var(--muted); margin-bottom: 18px; font-size: 16px; }
.about__text p b { color: var(--text); }
.about__facts { display: flex; flex-direction: column; gap: 1px; background: var(--border-soft); border: 1px solid var(--border-soft); border-radius: var(--r-md); overflow: hidden; }
.fact {
  background: var(--panel);
  padding: 22px 28px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
}
.fact span { font-size: 14px; color: var(--faint); flex: 0 0 auto; }
.fact b { font-size: 15px; font-weight: 600; text-align: right; }

/* ============ 联系 CTA ============ */
.contact { text-align: center; padding: 130px 0; position: relative; overflow: hidden; }
.contact__grid {
  position: absolute;
  inset: -64px;
  background-image:
    linear-gradient(rgba(255, 255, 255, .03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .03) 1px, transparent 1px);
  background-size: 64px 64px;
  animation: grid-pan 38s linear infinite reverse;
  mask-image: radial-gradient(ellipse 70% 80% at 50% 50%, #000 20%, transparent 72%);
  -webkit-mask-image: radial-gradient(ellipse 70% 80% at 50% 50%, #000 20%, transparent 72%);
  pointer-events: none;
}
.contact h2 {
  font-family: var(--font-display);
  font-size: clamp(30px, 4.4vw, 50px);
  font-weight: 800;
  letter-spacing: -0.01em;
  line-height: 1.3;
  margin-bottom: 20px;
}
.contact .sec-desc { margin: 0 auto 42px; }
.contact__cards {
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
  margin-top: 60px;
  position: relative;
  z-index: 1;
}
.ccard {
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  background: var(--panel);
  padding: 24px 34px;
  text-align: left;
  min-width: 240px;
}
.ccard span { font-family: var(--font-mono); font-size: 11.5px; letter-spacing: .16em; color: var(--faint); display: block; margin-bottom: 8px; }
.ccard b { font-size: 16.5px; font-weight: 600; }

/* ============ 页脚 ============ */
footer {
  border-top: 1px solid var(--border-soft);
  padding: 44px 0 36px;
  background: var(--bg-soft);
}
.foot__top { display: flex; justify-content: space-between; align-items: center; gap: 24px; flex-wrap: wrap; margin-bottom: 30px; }
.foot__links { display: flex; gap: 26px; flex-wrap: wrap; }
.foot__links a { font-size: 13.5px; color: var(--faint); transition: color .2s; }
.foot__links a:hover { color: var(--signal); }
.foot__bottom {
  border-top: 1px solid var(--border-soft);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--faint);
  letter-spacing: .04em;
}

/* ============ 响应式 ============ */
@media (max-width: 1024px) {
  .hero__inner { grid-template-columns: 1fr; gap: 60px; }
  .hero { padding-top: 120px; }
  .svc-grid { grid-template-columns: repeat(2, 1fr); }
  .zone__inner, .about__inner { grid-template-columns: 1fr; gap: 48px; }
  .steps { grid-template-columns: repeat(3, 1fr); gap: 36px 0; }
  .steps::before { display: none; }
}
@media (max-width: 720px) {
  .wrap { padding: 0 22px; }
  section { padding: 76px 0; }
  .nav__links {
    position: fixed;
    top: 68px; left: 0; right: 0;
    flex-direction: column;
    background: rgba(10, 11, 13, .97);
    backdrop-filter: blur(16px);
    padding: 28px 0 36px;
    gap: 24px;
    border-bottom: 1px solid var(--border-soft);
    transform: translateY(-130%);
    transition: transform .35s var(--ease-reveal);
  }
  .nav__links.open { transform: translateY(0); }
  .nav__burger { display: block; }
  .svc-grid, .eco-grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr 1fr; }
  .hero__stats { gap: 28px; }
  .chip-float--a { right: 0; }
  .chip-float--b { left: 0; }
}

/* 减少动态偏好 */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
  html { scroll-behavior: auto; }
}

/* ============ 品牌 Logo ============ */
.brand__logo {
  height: 38px;
  width: auto;
  display: block;
  filter: drop-shadow(0 0 10px rgba(46, 139, 255, .35));
}

/* ============ 宣传视频 ============ */
.video-sec {
  background: var(--bg-soft);
  border-bottom: 1px solid var(--border-soft);
  text-align: center;
}
.video-frame {
  max-width: 920px;
  margin: 52px auto 0;
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  overflow: hidden;
  background: #04070F;
  box-shadow: 0 0 0 1px rgba(46, 139, 255, .06), 0 24px 70px rgba(0, 0, 0, .5), 0 0 60px rgba(46, 139, 255, .08);
}
.video-frame video {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #04070F;
}

/* ============ Logo ============ */
.brand__logo { height: 34px; width: auto; display: block; }
.brand__logo--foot { height: 30px; }

/* ============ 宣传视频 ============ */
.video-sec { background: var(--bg-soft); border-top: 1px solid var(--border-soft); border-bottom: 1px solid var(--border-soft); }
.video-frame {
  margin-top: 52px;
  position: relative;
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  background: var(--panel);
  padding: 12px;
  box-shadow: 0 30px 80px rgba(0, 0, 0, .45);
}
.video-frame::before {
  content: "PROMO VIDEO · 宣传片";
  position: absolute;
  top: -11px; left: 28px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--signal);
  background: var(--bg-soft);
  padding: 2px 12px;
  border: 1px solid var(--border);
  border-radius: 100px;
}
.video-frame video {
  width: 100%;
  display: block;
  border-radius: var(--r-sm);
  aspect-ratio: 16 / 9;
  background:
    radial-gradient(ellipse 60% 70% at 50% 45%, rgba(62,159,255,.12), transparent 70%),
    #05070A;
}
.video-hint {
  margin-top: 16px;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--faint);
}
.video-hint b { color: var(--signal); font-weight: 400; }