/* ============================================================
   深圳市智元视界科技有限公司 — 官网样式
   设计基调：简约 / 大气 / 工业科技感
   ============================================================ */

/* ---------- Design Tokens ---------- */
:root {
  /* 主色 */
  --c-primary: #0a5cff;
  --c-primary-dark: #0040c1;
  --c-primary-soft: #e8f0ff;
  --c-accent: #00c2ff;

  /* 中性 */
  --c-ink: #0b1b33;
  --c-text: #33415c;
  --c-text-light: #6b7a90;
  --c-line: #e6ebf2;
  --c-bg: #ffffff;
  --c-bg-soft: #f6f8fb;
  --c-bg-deep: #0b1b33;

  /* 渐变 */
  --grad-primary: linear-gradient(135deg, #0a5cff 0%, #00a3ff 100%);
  --grad-accent: linear-gradient(135deg, #00c2ff 0%, #0a5cff 100%);

  /* 布局 */
  --maxw: 1200px;
  --gutter: 24px;
  --header-h: 72px;

  /* 圆角 / 阴影 */
  --r-sm: 8px;
  --r-md: 14px;
  --r-lg: 20px;
  --shadow-sm: 0 2px 10px rgba(11, 27, 51, .05);
  --shadow-md: 0 10px 30px rgba(11, 27, 51, .08);
  --shadow-lg: 0 24px 60px rgba(11, 27, 51, .14);

  /* 动效 */
  --ease: cubic-bezier(.22, .61, .36, 1);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: var(--c-text);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
}
img, svg { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4, p, figure, ul { margin: 0; }
ul { padding: 0; list-style: none; }
button { font: inherit; cursor: pointer; border: 0; background: none; }
input, textarea, select { font: inherit; color: inherit; }

::selection { background: rgba(10, 92, 255, .16); }

/* ---------- Layout Helpers ---------- */
.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 var(--gutter); }
.section { padding: 96px 0; }
.section--soft { background: var(--c-bg-soft); }
.section--deep { background: var(--c-bg-deep); color: #c9d6e8; }
.section--deep .sec-title h2, .section--deep .sec-title .sec-sub { color: #fff; }
.section--deep .sec-title p { color: #93a6c0; }

/* ---------- Section Header ---------- */
.sec-title { max-width: 720px; margin: 0 auto 56px; text-align: center; }
.sec-title .eyebrow {
  display: inline-block;
  font-size: 13px; letter-spacing: .18em; text-transform: uppercase;
  color: var(--c-primary); font-weight: 600; margin-bottom: 12px;
}
.sec-title h2 {
  font-size: clamp(26px, 3.4vw, 38px);
  line-height: 1.3; color: var(--c-ink); font-weight: 700; letter-spacing: -.01em;
}
.sec-title p { margin-top: 16px; color: var(--c-text-light); font-size: 16px; }
.sec-title .rule {
  width: 48px; height: 3px; border-radius: 3px; background: var(--grad-primary);
  margin: 20px auto 0;
}
.sec-title--left { text-align: left; margin-left: 0; }
.sec-title--left .rule { margin-left: 0; }

/* ---------- Header ---------- */
.header {
  position: fixed; inset: 0 0 auto 0; height: var(--header-h); z-index: 100;
  background: rgba(255, 255, 255, .86);
  backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: box-shadow .3s var(--ease), background .3s var(--ease), border-color .3s var(--ease);
}
.header.is-stuck { box-shadow: var(--shadow-sm); border-bottom-color: var(--c-line); }
.header .inner { height: 100%; display: flex; align-items: center; justify-content: space-between; gap: 24px; }

.logo { display: flex; align-items: center; gap: 11px; flex: 0 0 auto; }
.logo-mark {
  width: 38px; height: 38px; border-radius: 11px; background: var(--grad-primary);
  display: grid; place-items: center; flex: 0 0 auto;
  box-shadow: 0 6px 16px rgba(10, 92, 255, .3);
}
.logo-mark svg { width: 22px; height: 22px; }
.logo-text { display: flex; flex-direction: column; line-height: 1.15; }
.logo-text strong { font-size: 16px; color: var(--c-ink); letter-spacing: .01em; font-weight: 700; }
.logo-text span { font-size: 11px; color: var(--c-text-light); letter-spacing: .16em; text-transform: uppercase; }

.nav { display: flex; align-items: center; gap: 6px; }
.nav a {
  position: relative; padding: 8px 14px; font-size: 15px; color: var(--c-text);
  border-radius: var(--r-sm); transition: color .2s var(--ease), background .2s var(--ease);
}
.nav a:hover { color: var(--c-primary); background: var(--c-primary-soft); }
.nav a.is-active { color: var(--c-primary); font-weight: 600; }
.nav a.is-active::after {
  content: ""; position: absolute; left: 14px; right: 14px; bottom: 2px; height: 2px;
  background: var(--c-primary); border-radius: 2px;
}

.header-cta { display: flex; align-items: center; gap: 12px; }
.nav-toggle { display: none; width: 42px; height: 42px; border-radius: var(--r-sm); place-items: center; }
.nav-toggle span { display: block; width: 20px; height: 2px; background: var(--c-ink); border-radius: 2px; position: relative; }
.nav-toggle span::before, .nav-toggle span::after {
  content: ""; position: absolute; left: 0; width: 20px; height: 2px; background: var(--c-ink); border-radius: 2px;
  transition: transform .28s var(--ease);
}
.nav-toggle span::before { top: -6px; }
.nav-toggle span::after { top: 6px; }
.nav-toggle.is-open span { background: transparent; }
.nav-toggle.is-open span::before { transform: translateY(6px) rotate(45deg); }
.nav-toggle.is-open span::after { transform: translateY(-6px) rotate(-45deg); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 46px; padding: 0 26px; border-radius: 999px;
  font-size: 15px; font-weight: 600; white-space: nowrap;
  transition: transform .22s var(--ease), box-shadow .22s var(--ease), background .22s var(--ease), color .22s var(--ease), border-color .22s var(--ease);
}
.btn--primary { background: var(--grad-primary); color: #fff; box-shadow: 0 8px 22px rgba(10, 92, 255, .28); }
.btn--primary:hover { transform: translateY(-2px); box-shadow: 0 14px 30px rgba(10, 92, 255, .36); }
.btn--ghost { border: 1px solid var(--c-line); color: var(--c-ink); background: #fff; }
.btn--ghost:hover { border-color: var(--c-primary); color: var(--c-primary); transform: translateY(-2px); }
.btn--light { background: #fff; color: var(--c-primary-dark); }
.btn--light:hover { transform: translateY(-2px); box-shadow: 0 14px 30px rgba(0, 0, 0, .2); }
.btn--outline-light { border: 1px solid rgba(255, 255, 255, .4); color: #fff; }
.btn--outline-light:hover { background: rgba(255, 255, 255, .12); transform: translateY(-2px); }
.btn--sm { height: 38px; padding: 0 18px; font-size: 14px; }
.btn .arrow { transition: transform .22s var(--ease); }
.btn:hover .arrow { transform: translateX(4px); }

/* ---------- Hero ---------- */
.hero {
  position: relative; padding: calc(var(--header-h) + 80px) 0 100px;
  background:
    radial-gradient(1100px 520px at 88% -8%, rgba(10, 92, 255, .10), transparent 62%),
    radial-gradient(760px 420px at 4% 12%, rgba(0, 194, 255, .10), transparent 60%),
    #fff;
  overflow: hidden;
}
.hero::after {
  content: ""; position: absolute; inset: auto 0 0 0; height: 1px;
  background: linear-gradient(90deg, transparent, var(--c-line), transparent);
}
.hero .inner { display: grid; grid-template-columns: 1.05fr .95fr; gap: 56px; align-items: center; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px; height: 32px; padding: 0 14px;
  border-radius: 999px; background: var(--c-primary-soft); color: var(--c-primary-dark);
  font-size: 13px; font-weight: 600; margin-bottom: 24px;
}
.hero-badge i { width: 6px; height: 6px; border-radius: 50%; background: var(--c-primary); display: inline-block; }
.hero h1 {
  font-size: clamp(32px, 4.6vw, 54px); line-height: 1.22; font-weight: 800;
  color: var(--c-ink); letter-spacing: -.02em;
}
.hero h1 .hl {
  background: linear-gradient(120deg, #0a5cff, #00c2ff);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero .lead { margin-top: 22px; font-size: 17px; color: var(--c-text-light); max-width: 540px; }
.hero-actions { margin-top: 36px; display: flex; gap: 14px; flex-wrap: wrap; }
.hero-stats { margin-top: 52px; display: flex; gap: 44px; flex-wrap: wrap; }
.hero-stats .stat strong { display: block; font-size: 30px; color: var(--c-ink); font-weight: 800; line-height: 1.2; }
.hero-stats .stat strong em { font-style: normal; font-size: 16px; color: var(--c-text-light); margin-left: 2px; font-weight: 600; }
.hero-stats .stat span { font-size: 14px; color: var(--c-text-light); }

/* Hero 视觉 */
.hero-visual { position: relative; }
.hero-visual .frame {
  position: relative; border-radius: var(--r-lg); overflow: hidden;
  background: linear-gradient(160deg, #0d2a52, #123a6b 55%, #0a5cff 130%);
  box-shadow: var(--shadow-lg); aspect-ratio: 4 / 3;
}
.hero-visual .frame::before {
  content: ""; position: absolute; inset: 0;
  background-image: linear-gradient(rgba(255,255,255,.06) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(255,255,255,.06) 1px, transparent 1px);
  background-size: 44px 44px;
}
.hero-visual .scan {
  position: absolute; left: 8%; right: 8%; height: 2px; top: 18%;
  background: linear-gradient(90deg, transparent, #00e5ff, transparent);
  box-shadow: 0 0 18px 2px rgba(0, 229, 255, .7);
  animation: scan 4s var(--ease) infinite;
}
.hero-visual .cap {
  position: absolute; left: 8%; bottom: 10%; right: 8%;
  background: rgba(255, 255, 255, .1); border: 1px solid rgba(255, 255, 255, .22);
  backdrop-filter: blur(8px); border-radius: var(--r-md); padding: 14px 16px; color: #eaf2ff;
}
.hero-visual .cap strong { display: block; font-size: 15px; color: #fff; }
.hero-visual .cap span { font-size: 13px; color: #b9d2f5; }
.float-card {
  position: absolute; background: #fff; border-radius: var(--r-md); padding: 14px 18px;
  box-shadow: var(--shadow-md); border: 1px solid var(--c-line);
  display: flex; align-items: center; gap: 12px; animation: float 6s ease-in-out infinite;
}
.float-card .dot { width: 34px; height: 34px; border-radius: 10px; display: grid; place-items: center; }
.float-card .dot svg { width: 18px; height: 18px; }
.float-card strong { display: block; font-size: 20px; color: var(--c-ink); line-height: 1.2; font-weight: 800; }
.float-card span { font-size: 12px; color: var(--c-text-light); }
.float-card--a { left: -28px; top: 14%; }
.float-card--b { right: -20px; bottom: 16%; animation-delay: .8s; }

@keyframes scan { 0%, 100% { top: 14%; } 50% { top: 78%; } }
@keyframes float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }

/* ---------- 业务卡片 ---------- */
.grid { display: grid; gap: 24px; }
.grid--4 { grid-template-columns: repeat(4, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }

.card {
  background: #fff; border: 1px solid var(--c-line); border-radius: var(--r-md);
  padding: 32px 28px; transition: transform .28s var(--ease), box-shadow .28s var(--ease), border-color .28s var(--ease);
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: rgba(10, 92, 255, .28); }
.card .icon {
  width: 52px; height: 52px; border-radius: 14px; display: grid; place-items: center;
  background: var(--c-primary-soft); margin-bottom: 22px;
  transition: background .28s var(--ease), transform .28s var(--ease);
}
.card:hover .icon { background: var(--grad-primary); transform: scale(1.04); }
.card .icon svg { width: 26px; height: 26px; }
.card .icon svg [data-ico] { stroke: var(--c-primary); }
.card:hover .icon svg [data-ico] { stroke: #fff; }
.card h3 { font-size: 18px; color: var(--c-ink); font-weight: 700; margin-bottom: 10px; }
.card p { font-size: 15px; color: var(--c-text-light); }
.card .tags { margin-top: 18px; display: flex; flex-wrap: wrap; gap: 8px; }
.card .tags span {
  font-size: 12px; color: var(--c-primary-dark); background: var(--c-primary-soft);
  padding: 4px 10px; border-radius: 6px;
}

/* ---------- 产品条 ---------- */
.product-showcase { display: grid; grid-template-columns: .95fr 1.05fr; gap: 56px; align-items: center; }
.product-figure {
  position: relative; aspect-ratio: 1 / 1; border-radius: var(--r-lg); overflow: hidden;
  background: linear-gradient(150deg, #f2f6fc, #e4ecf9);
  display: grid; place-items: center; border: 1px solid var(--c-line);
}
.product-figure::before {
  content: ""; position: absolute; inset: 0;
  background-image: radial-gradient(rgba(10, 92, 255, .10) 1px, transparent 1px);
  background-size: 22px 22px;
}
.spec-list { margin-top: 26px; display: grid; gap: 14px; }
.spec-list li { display: flex; gap: 12px; align-items: flex-start; font-size: 15px; color: var(--c-text); }
.spec-list svg { width: 20px; height: 20px; flex: 0 0 auto; margin-top: 4px; }

/* ---------- 案例 ---------- */
.case-card {
  position: relative; border-radius: var(--r-lg); overflow: hidden; background: var(--c-bg-deep);
  min-height: 320px; display: flex; flex-direction: column; justify-content: flex-end;
  padding: 30px; color: #fff; transition: transform .3s var(--ease), box-shadow .3s var(--ease);
}
.case-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.case-card .bg { position: absolute; inset: 0; opacity: .9; }
.case-card .mask {
  position: absolute; inset: 0; background: linear-gradient(180deg, rgba(11, 27, 51, .1) 0%, rgba(11, 27, 51, .88) 78%);
}
.case-card .body { position: relative; z-index: 2; }
.case-card .tagn {
  display: inline-block; font-size: 12px; letter-spacing: .1em; text-transform: uppercase;
  color: #7fd2ff; font-weight: 700; margin-bottom: 10px;
}
.case-card h3 { font-size: 21px; font-weight: 700; margin-bottom: 12px; }
.case-card p { font-size: 14.5px; color: #c9d6e8; line-height: 1.8; }

/* ---------- 优势 / 数字 ---------- */
.advantage { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.advantage .item {
  padding: 30px 26px; border-radius: var(--r-md); background: rgba(255, 255, 255, .04);
  border: 1px solid rgba(255, 255, 255, .1);
}
.advantage .item strong { display: block; font-size: 34px; font-weight: 800; color: #fff; line-height: 1.2; }
.advantage .item strong em { font-style: normal; font-size: 15px; font-weight: 600; color: #7fd2ff; margin-left: 3px; }
.advantage .item span { display: block; margin-top: 8px; font-size: 14px; color: #93a6c0; }

/* ---------- 流程 ---------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; counter-reset: s; }
.step { position: relative; padding-top: 28px; }
.step::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: var(--c-line); border-radius: 3px;
}
.step::after {
  content: ""; position: absolute; top: 0; left: 0; width: 0; height: 3px; background: var(--grad-primary); border-radius: 3px;
  transition: width .6s var(--ease);
}
.step.is-in::after { width: 100%; }
.step .num {
  font-size: 13px; font-weight: 800; letter-spacing: .1em; color: var(--c-primary); margin: 18px 0 10px; display: block;
}
.step h3 { font-size: 17px; color: var(--c-ink); font-weight: 700; margin-bottom: 8px; }
.step p { font-size: 14.5px; color: var(--c-text-light); }

/* ---------- 时间线 ---------- */
.timeline { position: relative; padding-left: 34px; }
.timeline::before { content: ""; position: absolute; left: 7px; top: 6px; bottom: 6px; width: 2px; background: var(--c-line); }
.timeline .tl-item { position: relative; padding-bottom: 34px; }
.timeline .tl-item:last-child { padding-bottom: 0; }
.timeline .tl-item::before {
  content: ""; position: absolute; left: -34px; top: 8px; width: 16px; height: 16px; border-radius: 50%;
  background: #fff; border: 3px solid var(--c-primary);
}
.timeline .tl-item .year { font-size: 14px; font-weight: 800; color: var(--c-primary); letter-spacing: .04em; }
.timeline .tl-item h3 { font-size: 17px; color: var(--c-ink); margin: 6px 0 6px; font-weight: 700; }
.timeline .tl-item p { font-size: 15px; color: var(--c-text-light); }

/* ---------- 联系 ---------- */
.contact-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 48px; align-items: start; }
.info-list { display: grid; gap: 18px; }
.info-item {
  display: flex; gap: 16px; padding: 22px; border: 1px solid var(--c-line); border-radius: var(--r-md);
  background: #fff; transition: border-color .25s var(--ease), box-shadow .25s var(--ease);
}
.info-item:hover { border-color: rgba(10, 92, 255, .3); box-shadow: var(--shadow-sm); }
.info-item .ic {
  width: 44px; height: 44px; flex: 0 0 auto; border-radius: 12px; background: var(--c-primary-soft);
  display: grid; place-items: center;
}
.info-item .ic svg { width: 21px; height: 21px; }
.info-item .ic svg [data-ico] { stroke: var(--c-primary); }
.info-item .k { font-size: 13px; color: var(--c-text-light); }
.info-item .v { font-size: 16px; color: var(--c-ink); font-weight: 600; }

.form-card { background: #fff; border: 1px solid var(--c-line); border-radius: var(--r-lg); padding: 36px; box-shadow: var(--shadow-sm); }
.field { margin-bottom: 20px; }
.field label { display: block; font-size: 14px; font-weight: 600; color: var(--c-ink); margin-bottom: 8px; }
.field label i { color: #e5484d; font-style: normal; margin-left: 2px; }
.field input, .field textarea, .field select {
  width: 100%; border: 1px solid var(--c-line); border-radius: var(--r-sm); padding: 12px 14px;
  background: #fbfcfe; outline: none; transition: border-color .2s var(--ease), background .2s var(--ease), box-shadow .2s var(--ease);
}
.field input:focus, .field textarea:focus, .field select:focus {
  border-color: var(--c-primary); background: #fff; box-shadow: 0 0 0 3px rgba(10, 92, 255, .12);
}
.field textarea { min-height: 118px; resize: vertical; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.form-note { font-size: 13px; color: var(--c-text-light); margin-top: 14px; }
.form-msg {
  display: none; margin-top: 16px; padding: 12px 16px; border-radius: var(--r-sm); font-size: 14px;
  background: #e7f7ee; color: #0f7b45; border: 1px solid #bde7cf;
}
.form-msg.is-show { display: block; }
.form-msg.is-error { background: #fdecec; color: #b3261e; border-color: #f6c9c6; }

.map-box {
  margin-top: 24px; border: 1px solid var(--c-line); border-radius: var(--r-md); overflow: hidden;
  background: var(--c-bg-soft); aspect-ratio: 16 / 7; position: relative;
}

/* ---------- CTA ---------- */
.cta-band {
  position: relative; overflow: hidden; border-radius: var(--r-lg); padding: 64px 56px;
  background: linear-gradient(120deg, #08203f 0%, #0a5cff 100%);
  display: flex; align-items: center; justify-content: space-between; gap: 32px; color: #fff;
}
.cta-band::after {
  content: ""; position: absolute; right: -80px; top: -120px; width: 380px; height: 380px; border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 194, 255, .35), transparent 68%);
}
.cta-band h2 { font-size: clamp(24px, 3vw, 34px); font-weight: 800; line-height: 1.35; }
.cta-band p { margin-top: 12px; color: #c3d8f7; }
.cta-band .acts { display: flex; gap: 12px; flex: 0 0 auto; position: relative; z-index: 2; }

/* ---------- Page Hero (内页) ---------- */
.page-hero {
  position: relative; padding: calc(var(--header-h) + 72px) 0 76px; text-align: center;
  background:
    radial-gradient(900px 420px at 50% -20%, rgba(10, 92, 255, .14), transparent 60%),
    var(--c-bg-soft);
  border-bottom: 1px solid var(--c-line);
}
.page-hero .crumb { font-size: 13px; color: var(--c-text-light); margin-bottom: 14px; }
.page-hero .crumb a:hover { color: var(--c-primary); }
.page-hero h1 { font-size: clamp(28px, 3.8vw, 42px); font-weight: 800; color: var(--c-ink); letter-spacing: -.01em; }
.page-hero p { margin: 16px auto 0; max-width: 660px; color: var(--c-text-light); font-size: 16.5px; }

/* ---------- 通用文本块 ---------- */
.prose p { margin-bottom: 18px; font-size: 16px; color: var(--c-text); }
.prose p:last-child { margin-bottom: 0; }
.prose strong { color: var(--c-ink); }

.split { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.split--reverse .split-media { order: 2; }

.value-list { display: grid; gap: 14px; margin-top: 24px; }
.value-list li { display: flex; gap: 12px; align-items: flex-start; font-size: 15.5px; }
.value-list li svg { width: 20px; height: 20px; flex: 0 0 auto; margin-top: 5px; }

/* ---------- 技术能力 ---------- */
.tech-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.tech-item { padding: 32px; border-radius: var(--r-md); background: #fff; border: 1px solid var(--c-line); }
.tech-item .n { font-size: 13px; font-weight: 800; color: var(--c-primary); letter-spacing: .12em; }
.tech-item h3 { font-size: 18px; color: var(--c-ink); margin: 10px 0 10px; font-weight: 700; }
.tech-item p { font-size: 15px; color: var(--c-text-light); }

/* ---------- Footer ---------- */
.footer { background: var(--c-bg-deep); color: #93a6c0; padding: 68px 0 0; }
.footer .f-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.2fr; gap: 40px; padding-bottom: 48px; }
.footer .logo-text strong { color: #fff; }
.footer .logo-text span { color: #6f839e; }
.footer .f-about { margin-top: 20px; font-size: 14.5px; line-height: 1.9; max-width: 320px; }
.footer h4 { color: #fff; font-size: 15px; font-weight: 700; margin-bottom: 18px; }
.footer ul li { margin-bottom: 11px; font-size: 14.5px; }
.footer ul a { color: #93a6c0; transition: color .2s var(--ease), transform .2s var(--ease); display: inline-block; }
.footer ul a:hover { color: #fff; transform: translateX(3px); }
.footer .f-contact li { display: flex; gap: 10px; }
.footer .f-contact svg { width: 17px; height: 17px; flex: 0 0 auto; margin-top: 3px; }
.footer .f-contact svg [data-ico] { stroke: #6f839e; }
.footer .f-bottom {
  border-top: 1px solid rgba(255, 255, 255, .09); padding: 22px 0; font-size: 13.5px;
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
}
.footer .f-bottom a:hover { color: #fff; }

/* ---------- 回到顶部 ---------- */
.to-top {
  position: fixed; right: 26px; bottom: 26px; width: 46px; height: 46px; border-radius: 50%;
  background: #fff; border: 1px solid var(--c-line); box-shadow: var(--shadow-md);
  display: grid; place-items: center; z-index: 90; opacity: 0; pointer-events: none;
  transition: opacity .28s var(--ease), transform .28s var(--ease), background .2s var(--ease);
}
.to-top.is-show { opacity: 1; pointer-events: auto; }
.to-top:hover { transform: translateY(-3px); background: var(--c-primary); }
.to-top:hover svg [data-ico] { stroke: #fff; }
.to-top svg { width: 20px; height: 20px; }
.to-top svg [data-ico] { stroke: var(--c-ink); }

/* ---------- 滚动出现 ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.is-in { opacity: 1; transform: none; }

/* ============================================================
   产品视频与资料下载
   ============================================================ */
.media-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
  gap: 28px;
  align-items: start;
}

/* --- 视频 --- */
.video-card {
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--r-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.video-frame { position: relative; aspect-ratio: 16 / 9; background: #06101f; }
.video-frame video {
  width: 100%; height: 100%; display: block;
  object-fit: contain; background: #06101f;
}
.video-body { padding: 24px 26px 28px; }
.video-body h3 { font-size: 19px; color: var(--c-ink); font-weight: 700; }
.video-body p { margin-top: 8px; font-size: 15px; color: var(--c-text-light); }
.video-tags { margin-top: 16px; display: flex; flex-wrap: wrap; gap: 8px; }
.video-tags span {
  font-size: 12px; color: var(--c-primary-dark); background: var(--c-primary-soft);
  padding: 4px 10px; border-radius: 6px;
}

/* --- 资料下载列表 --- */
.dl-list { display: flex; flex-direction: column; gap: 16px; }
.dl-item {
  display: flex; gap: 16px; align-items: flex-start;
  padding: 22px 24px;
  background: #fff; border: 1px solid var(--c-line); border-radius: var(--r-md);
  transition: transform .24s var(--ease), box-shadow .24s var(--ease), border-color .24s var(--ease);
}
.dl-item:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: rgba(10, 92, 255, .28); }
.dl-ico {
  flex: none; width: 46px; height: 46px; border-radius: 12px;
  display: grid; place-items: center; background: var(--c-primary-soft);
  transition: background .24s var(--ease);
}
.dl-ico svg { width: 24px; height: 24px; }
.dl-ico svg [data-ico] { stroke: var(--c-primary); transition: stroke .24s var(--ease); }
.dl-item:hover .dl-ico { background: var(--grad-primary); }
.dl-item:hover .dl-ico svg [data-ico] { stroke: #fff; }
.dl-txt { min-width: 0; }
.dl-txt h4 { font-size: 16px; color: var(--c-ink); font-weight: 700; }
.dl-txt p { margin-top: 5px; font-size: 14px; color: var(--c-text-light); }
.dl-meta {
  margin-top: 10px; display: flex; align-items: center; flex-wrap: wrap; gap: 10px;
  font-size: 13px; color: var(--c-text-light);
}
.dl-meta .sep { width: 1px; height: 12px; background: var(--c-line); }
.dl-actions { margin-top: 14px; display: flex; flex-wrap: wrap; align-items: center; gap: 10px 18px; }
.dl-act {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 14px; font-weight: 700; color: var(--c-primary);
}
.dl-act .arrow { transition: transform .22s var(--ease); }
.dl-item:hover .dl-act .arrow { transform: translateX(4px); }
.dl-act--ghost {
  border: 1px solid var(--c-line); border-radius: 999px;
  padding: 6px 14px; font-size: 13px; color: var(--c-ink); font-weight: 600;
  transition: border-color .22s var(--ease), color .22s var(--ease), background .22s var(--ease);
}
.dl-act--ghost:hover { border-color: var(--c-primary); color: var(--c-primary); background: var(--c-primary-soft); }

/* ============================================================
   ZY-100 应用案例（竖屏视频）
   ============================================================ */
.vcase-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 32px;
  max-width: 960px;
  margin: 0 auto;
}
.vcase-card {
  display: flex; flex-direction: column;
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--r-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
/* 源视频为竖屏（720×1280 / 720×1152），这里用 9:16 竖版容器承载，
   object-fit: contain 保证画面完整、不被裁切 */
.vcase-frame { position: relative; aspect-ratio: 9 / 16; background: #0a1526; }
.vcase-frame video {
  width: 100%; height: 100%; display: block;
  object-fit: contain; background: #0a1526;
}
.vcase-body {
  flex: 1;
  display: flex; flex-direction: column;
  padding: 22px 24px 26px;
}
.vcase-no {
  font-size: 12px; font-weight: 700; letter-spacing: .08em;
  color: var(--c-primary);
}
.vcase-body h3 { margin-top: 6px; font-size: 19px; color: var(--c-ink); font-weight: 700; }
.vcase-body p { margin-top: 10px; font-size: 15px; color: var(--c-text-light); }
.vcase-specs { list-style: none; margin-top: 18px; border-top: 1px dashed var(--c-line); }
.vcase-specs li {
  display: flex; justify-content: space-between; gap: 14px;
  padding: 9px 0; border-bottom: 1px dashed var(--c-line);
  font-size: 13.5px;
}
.vcase-specs b { flex: none; font-weight: 600; color: var(--c-ink); }
.vcase-specs span { color: var(--c-text-light); text-align: right; }
.vcase-body .dl-actions { margin-top: auto; padding-top: 18px; }

.vcase-note {
  margin-top: 40px; padding: 20px 26px;
  background: var(--c-primary-soft);
  border: 1px solid rgba(10, 92, 255, .16);
  border-radius: var(--r-md);
  font-size: 15px; color: var(--c-text-light); text-align: center;
}
.vcase-note strong { color: var(--c-ink); }
.vcase-note a { margin-left: 8px; color: var(--c-primary); font-weight: 600; white-space: nowrap; }
.vcase-note a:hover .arrow { transform: translateX(4px); }
.vcase-note a .arrow { display: inline-block; transition: transform .22s var(--ease); }

/* ============================================================
   ZY-100 整机组成
   ============================================================ */
.two-shot {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 48px;
}
.two-shot figure {
  margin: 0;
  border-radius: var(--r-md);
  overflow: hidden;
  border: 1px solid var(--c-line);
  background: #f6f8fb;
}
.two-shot img { width: 100%; height: 320px; object-fit: cover; display: block; }
.two-shot figcaption {
  padding: 12px 16px;
  font-size: 14px; color: var(--c-text-light);
  border-top: 1px solid var(--c-line); background: #fff;
}

.part-card {
  padding: 28px 26px;
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--r-md);
  transition: transform .24s var(--ease), box-shadow .24s var(--ease), border-color .24s var(--ease);
}
.part-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: rgba(10, 92, 255, .28); }
.part-card .num {
  display: inline-grid; place-items: center;
  width: 36px; height: 36px; border-radius: 10px;
  background: var(--grad-primary); color: #fff;
  font-size: 14px; font-weight: 800; letter-spacing: .02em;
  margin-bottom: 14px;
}
.part-card h3 { font-size: 17px; color: var(--c-ink); font-weight: 700; margin-bottom: 8px; }
.part-card .role { font-size: 13px; color: var(--c-primary); font-weight: 700; margin-bottom: 10px; }
.part-card p { font-size: 14px; color: var(--c-text-light); line-height: 1.7; }

/* ============================================================
   ZY-100 软件系统
   ============================================================ */
.software-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  gap: 36px;
  align-items: start;
}
.software-shot {
  margin: 0;
  border-radius: var(--r-md);
  overflow: hidden;
  border: 1px solid var(--c-line);
  background: #0b1b33;
  box-shadow: var(--shadow-sm);
}
.software-shot img { width: 100%; height: auto; display: block; }
.software-shot figcaption {
  padding: 12px 18px;
  font-size: 13px; color: #93a6c0;
  background: #06101f; color: #cbd5e1;
  border-top: 1px solid rgba(255,255,255,.06);
}
.software-shot figcaption strong { color: #7fd2ff; font-weight: 700; }

.software-modules { display: flex; flex-direction: column; gap: 14px; }
.module-card {
  display: flex; gap: 16px; align-items: flex-start;
  padding: 18px 20px;
  background: #fff;
  border: 1px solid var(--c-line); border-radius: var(--r-md);
  transition: transform .24s var(--ease), box-shadow .24s var(--ease), border-color .24s var(--ease);
}
.module-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-sm); border-color: rgba(10, 92, 255, .28); }
.module-card .tab {
  flex: none; min-width: 76px;
  padding: 8px 12px;
  background: var(--c-primary-soft); color: var(--c-primary-dark);
  border-radius: 8px; font-size: 14px; font-weight: 700;
  text-align: center;
}
.module-card h4 { font-size: 15px; color: var(--c-ink); font-weight: 700; margin-bottom: 6px; }
.module-card p { font-size: 13.5px; color: var(--c-text-light); line-height: 1.65; }
.module-card.is-active .tab { background: var(--grad-primary); color: #fff; }

.spec-list {
  margin-top: 14px;
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px 20px;
  padding-top: 18px; border-top: 1px dashed var(--c-line);
  font-size: 13.5px; color: var(--c-text-light);
}
.spec-list li { display: flex; gap: 8px; }
.spec-list li b { color: var(--c-ink); font-weight: 600; min-width: 80px; }

/* ---------- 联系页 QR 卡 ---------- */
.qr-card {
  margin-top: 26px;
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--r-md);
  padding: 18px 20px;
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 20px;
  align-items: center;
}
.qr-card .qr-img {
  border-radius: 10px;
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--c-line);
}
.qr-card .qr-img img { width: 100%; height: auto; display: block; }
.qr-card .qr-tip h4 { font-size: 16px; color: var(--c-ink); font-weight: 700; margin-bottom: 8px; }
.qr-card .qr-tip p { font-size: 14px; color: var(--c-text-light); line-height: 1.7; }
.qr-card .qr-tags { margin-top: 10px; display: flex; flex-wrap: wrap; gap: 8px; }
.qr-card .qr-tags span {
  font-size: 12px; color: var(--c-primary-dark); background: var(--c-primary-soft);
  padding: 4px 10px; border-radius: 6px;
}

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .advantage, .steps { grid-template-columns: repeat(2, 1fr); }
  .tech-grid { grid-template-columns: 1fr 1fr; }
  .footer .f-grid { grid-template-columns: 1fr 1fr; }
  .hero .inner { grid-template-columns: 1fr; gap: 48px; }
  .hero-visual { max-width: 560px; }
  .product-showcase, .split, .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .split--reverse .split-media { order: 0; }
  .media-layout, .software-layout { grid-template-columns: 1fr; }
  .two-shot { grid-template-columns: 1fr; }
  /* 竖屏案例卡改为单列居中，避免两个竖长条并排过高 */
  .vcase-grid { grid-template-columns: minmax(0, 420px); justify-content: center; }
  .qr-card { grid-template-columns: 1fr; text-align: center; }
  .qr-card .qr-img { max-width: 280px; margin: 0 auto; }
}

@media (max-width: 860px) {
  .nav-toggle { display: grid; }
  .nav {
    position: fixed; top: var(--header-h); left: 0; right: 0; flex-direction: column; align-items: stretch;
    gap: 2px; padding: 14px 20px 22px; background: #fff; border-bottom: 1px solid var(--c-line);
    box-shadow: var(--shadow-md); transform: translateY(-12px); opacity: 0; pointer-events: none;
    transition: opacity .25s var(--ease), transform .25s var(--ease);
  }
  .nav.is-open { transform: none; opacity: 1; pointer-events: auto; }
  .nav a { padding: 12px 8px; border-radius: var(--r-sm); }
  .nav a.is-active::after { display: none; }
  .header-cta .btn { display: none; }
  .section { padding: 68px 0; }
}

@media (max-width: 680px) {
  .grid--4, .grid--3, .grid--2, .advantage, .steps, .tech-grid, .field-row { grid-template-columns: 1fr; }
  .footer .f-grid { grid-template-columns: 1fr; }
  .hero { padding-top: calc(var(--header-h) + 48px); }
  .hero-stats { gap: 28px; }
  .float-card--a { left: 0; top: -18px; }
  .float-card--b { right: 0; bottom: -18px; }
  .cta-band { padding: 40px 28px; flex-direction: column; align-items: flex-start; }
  .form-card { padding: 26px 20px; }
  .case-card { min-height: 280px; }
  .video-body { padding: 20px 18px 24px; }
  .dl-item { padding: 18px; }
  .vcase-body { padding: 20px 18px 24px; }
  .vcase-note { padding: 18px 18px; }
}