/* ==========================================================
   广捷云讯 企业门户 · 设计系统 v3
   深色沉浸式 · 电影级基础设施视觉 · 克制蓝青光效
   ========================================================== */
:root {
  --bg: #0A1728;            /* 主背景：深空蓝（v3.4 由近黑提亮为可感知的蓝） */
  --bg-2: #0F2440;          /* 面板：宝蓝 */
  --bg-3: #16305A;
  --line: rgba(148,180,210,.16);
  --line-soft: rgba(148,180,210,.10);
  --tx: #EAF1FA;
  --tx2: #A6B8CF;           /* 次级文字 */
  --tx3: #6B7F99;           /* 弱化文字 */
  --cy: #2FD8E8;            /* 蓝青强调 */
  --cy-deep: #17A2B8;
  --indigo: #5B77FF;        /* 新增：电光靛蓝 */
  --violet: #8B5CF6;        /* 新增：渐层紫 */
  --mint: #21D4C0;          /* 新增：薄荷青 */
  --ff: "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  --w: 1240px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--ff);
  color: var(--tx);
  background: var(--bg);
  font-size: 15.5px;
  line-height: 1.85;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul, ol { list-style: none; }
.container { max-width: var(--w); margin: 0 auto; padding: 0 28px; }
.placeholder { color: var(--tx3); font-style: normal; }

/* ---------- 字体层级 ---------- */
h1, h2, h3, h4, h5 { font-weight: 700; line-height: 1.28; letter-spacing: .01em; }
.eyebrow {
  display: flex; align-items: center; gap: 12px;
  font-size: 12.5px; font-weight: 600; letter-spacing: .32em;
  color: var(--cy); text-transform: uppercase;
  margin-bottom: 18px;
}
.eyebrow::before { content: ""; width: 28px; height: 1px; background: var(--cy); }
.sec-title { font-size: clamp(27px, 3.1vw, 38px); color: var(--tx); }
.sec-desc { color: var(--tx2); margin-top: 14px; max-width: 760px; font-size: 15.5px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 13px 30px; border-radius: 3px;
  font-size: 15px; font-weight: 600; cursor: pointer; border: 1px solid transparent;
  transition: all .22s ease; white-space: nowrap;
}
.btn svg { width: 16px; height: 16px; }
.btn-primary { background: var(--cy); color: #04121C; }
.btn-primary:hover { background: #5BD6E6; }
.btn-ghost { border-color: rgba(255,255,255,.4); color: #fff; }
.btn-ghost:hover { border-color: var(--cy); color: var(--cy); }
.btn-lg { padding: 16px 40px; font-size: 15.5px; }

/* ---------- 导航 ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  padding: 22px 0; transition: background .35s, box-shadow .35s, padding .35s;
}
.nav.scrolled {
  background: rgba(6,11,20,.82); backdrop-filter: blur(16px);
  box-shadow: 0 1px 0 var(--line-soft); padding: 12px 0;
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; }
.logo { display: flex; align-items: center; gap: 11px; color: #fff; }
.logo-mark { display: flex; color: var(--cy); }
.logo-text { font-size: 20px; font-weight: 800; letter-spacing: .06em; display: flex; flex-direction: column; line-height: 1.05; }
.logo-text small { font-size: 9.5px; font-weight: 500; letter-spacing: .3em; opacity: .6; }
.nav-links { display: flex; align-items: center; gap: 34px; }
.nav-links > a, .nav-item > a { color: rgba(255,255,255,.78); font-size: 15px; font-weight: 500; position: relative; transition: color .25s; }
.nav-links > a:not(.nav-cta)::after, .nav-item > a::after {
  content: ""; position: absolute; left: 0; bottom: -7px; width: 0; height: 2px;
  background: var(--cy); transition: width .25s;
}
.nav-links > a:not(.nav-cta):hover::after, .nav-item > a:hover::after { width: 100%; }
.nav-links a.active:not(.nav-cta) { color: var(--cy); }
.nav-links a.active::after { width: 100%; }
.nav-cta { padding: 10px 24px !important; }
.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 6px; }
.nav-toggle span { width: 24px; height: 2px; background: #fff; border-radius: 2px; transition: all .3s; }
/* 下拉 */
.nav-item { position: relative; }
.dropdown-menu {
  position: absolute; top: calc(100% + 14px); left: 50%; transform: translateX(-50%) translateY(8px);
  background: rgba(10,18,32,.97); backdrop-filter: blur(16px);
  border: 1px solid var(--line); border-top: 2px solid var(--cy);
  border-radius: 4px; box-shadow: 0 24px 60px rgba(0,0,0,.5);
  padding: 8px; min-width: 280px; opacity: 0; visibility: hidden;
  transition: all .25s ease; z-index: 110;
}
.nav-item:hover .dropdown-menu { opacity: 1; visibility: visible; transform: translateX(-50%) translateY(0); }
.dropdown-menu a { display: block; padding: 11px 16px; border-radius: 3px; color: var(--tx) !important; transition: background .2s; }
.dropdown-menu a::after { display: none !important; }
.dropdown-menu a:hover { background: rgba(58,200,220,.08); }
.dropdown-menu a b { display: block; font-size: 14px; font-weight: 600; }
.dropdown-menu a small { display: block; color: var(--tx3); font-size: 12px; }

/* ---------- 首屏：电影级主视觉（居中式） ---------- */
.hero {
  position: relative; min-height: 100vh;
  display: flex; align-items: center; justify-content: center; text-align: center;
  overflow: hidden;
}
.hero-bg {
  position: absolute; inset: -12% 0;
  background: url("assets/img/hero-chip.jpg") center/cover no-repeat;
  will-change: transform;
}
.hero::before {
  content: ""; position: absolute; inset: 0; z-index: 1;
  background:
    radial-gradient(ellipse 70% 55% at 50% 30%, rgba(6,11,20,.5), transparent 70%),
    linear-gradient(180deg, rgba(6,11,20,.72) 0%, rgba(6,11,20,.24) 34%, rgba(6,11,20,.34) 62%, var(--bg) 100%);
}
.hero-content { position: relative; z-index: 2; padding: 120px 28px 0; max-width: 940px; }
.hero-brand {
  display: inline-flex; align-items: center; gap: 14px;
  color: #fff; font-size: 22px; font-weight: 800; letter-spacing: .1em;
  margin-bottom: 38px;
}
.hero-brand .logo-mark { color: var(--cy); }
.hero-brand small { display: block; font-size: 10px; letter-spacing: .4em; opacity: .55; font-weight: 500; }
.hero h1 {
  color: #fff; font-size: clamp(34px, 5.2vw, 62px); font-weight: 800;
  line-height: 1.22; letter-spacing: .02em;
}
.hero h1 em { font-style: normal; color: var(--cy); }
.hero-sub {
  color: rgba(255,255,255,.68); font-size: clamp(15px, 1.6vw, 17.5px);
  margin: 26px auto 44px; max-width: 640px;
}
.hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.hero-scroll {
  position: absolute; bottom: 34px; left: 50%; transform: translateX(-50%);
  z-index: 2; display: flex; flex-direction: column; align-items: center; gap: 10px;
  color: rgba(255,255,255,.45); font-size: 11px; letter-spacing: .3em;
}
.hero-scroll i {
  width: 1px; height: 44px; background: linear-gradient(rgba(255,255,255,.5), transparent);
  display: block; animation: drip 2.2s ease infinite;
}
@keyframes drip { 0% { transform: scaleY(0); transform-origin: top; } 55% { transform: scaleY(1); transform-origin: top; } 100% { transform: scaleY(0); transform-origin: bottom; } }

/* ---------- 数据条 ---------- */
.strip { border-top: 1px solid var(--line-soft); background: var(--bg); }
.strip-inner { display: flex; }
.strip .strip-item { flex: 1; padding: 34px 8px 34px 30px; border-left: 1px solid var(--line-soft); }
.strip .strip-item:first-child { border-left: none; padding-left: 0; }
.strip-item b { font-size: 32px; font-weight: 800; color: #fff; font-variant-numeric: tabular-nums; }
.strip-item b i { font-style: normal; color: var(--cy); font-size: 17px; margin-left: 3px; font-weight: 600; }
.strip-item span { display: block; color: var(--tx3); font-size: 13px; margin-top: 2px; }

/* ---------- 通用分区 ---------- */
.section { padding: 110px 0; position: relative; }
.sec-head { max-width: 780px; margin-bottom: 56px; }
.sec-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.sec-head.center .eyebrow { justify-content: center; }
.sec-head.center .sec-desc { margin-left: auto; margin-right: auto; }
.sec-head.center .eyebrow::before { display: none; }

/* ---------- 业务磁贴（横向延展深色平台布局） ---------- */
.tile-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.tile {
  position: relative; height: 300px; border-radius: 6px; overflow: hidden;
  border: 1px solid var(--line-soft); display: flex; align-items: flex-end;
  transition: border-color .25s, transform .25s;
}
.tile img {
  position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover;
  transition: transform .6s cubic-bezier(.2,.6,.2,1); filter: saturate(.9);
}
.tile::before {
  content: ""; position: absolute; inset: 0; z-index: 1;
  background: linear-gradient(185deg, rgba(6,11,20,.1) 30%, rgba(6,11,20,.88) 86%);
}
.tile:hover { border-color: rgba(58,200,220,.45); transform: translateY(-4px); }
.tile:hover img { transform: scale(1.07); }
.tile-body { position: relative; z-index: 2; padding: 24px 26px; width: 100%; }
.tile-no { font-size: 12px; font-weight: 700; letter-spacing: .24em; color: var(--cy); display: block; margin-bottom: 8px; }
.tile-body b { display: block; color: #fff; font-size: 18.5px; font-weight: 650; margin-bottom: 5px; }
.tile-body span { display: block; color: var(--tx2); font-size: 13.5px; line-height: 1.6; }
.tile-go {
  position: absolute; top: 18px; right: 18px; z-index: 2;
  width: 34px; height: 34px; border-radius: 50%;
  border: 1px solid rgba(255,255,255,.25); display: flex; align-items: center; justify-content: center;
  color: rgba(255,255,255,.7); transition: all .25s;
}
.tile-go svg { width: 15px; height: 15px; }
.tile:hover .tile-go { background: var(--cy); border-color: var(--cy); color: #04121C; }

/* ---------- 一体化能力：大视觉 + 协同点 ---------- */
.fusion-visual {
  position: relative; border-radius: 8px; overflow: hidden;
  border: 1px solid var(--line-soft);
}
.fusion-visual img { width: 100%; display: block; }
.fusion-visual figcaption {
  position: absolute; left: 0; right: 0; bottom: 0; padding: 20px 26px;
  background: linear-gradient(transparent, rgba(6,11,20,.9));
  color: var(--tx2); font-size: 12.5px; letter-spacing: .08em;
}
.fusion-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line-soft); border: 1px solid var(--line-soft); border-radius: 6px; overflow: hidden; margin-top: -1px; }
.fusion-item { background: var(--bg-2); padding: 30px 26px; transition: background .22s; }
.fusion-item:hover { background: var(--bg-3); }
.fusion-item b { display: block; color: #fff; font-size: 16.5px; margin-bottom: 7px; }
.fusion-item b i { font-style: normal; color: var(--cy); font-size: 13px; margin-right: 9px; font-variant-numeric: tabular-nums; }
.fusion-item p { color: var(--tx2); font-size: 13.5px; line-height: 1.7; }

/* ---------- 沉浸式业务展示（全幅视差行） ---------- */
.imm {
  position: relative; min-height: 82vh; display: flex; align-items: center;
  overflow: hidden; border-top: 1px solid var(--line-soft);
}
.imm-bg { position: absolute; inset: -10% 0; background-size: cover; background-position: center; will-change: transform; }
.imm::before {
  content: ""; position: absolute; inset: 0; z-index: 1;
  background: linear-gradient(78deg, rgba(6,11,20,.9) 6%, rgba(6,11,20,.55) 48%, rgba(6,11,20,.18) 85%);
}
.imm.alt::before { background: linear-gradient(282deg, rgba(6,11,20,.9) 6%, rgba(6,11,20,.55) 48%, rgba(6,11,20,.18) 85%); }
.imm-content { position: relative; z-index: 2; max-width: 560px; padding: 90px 0; }
.imm.alt .imm-content { margin-left: auto; }
.imm-no { font-size: 13px; font-weight: 700; letter-spacing: .3em; color: var(--cy); margin-bottom: 16px; }
.imm-content h3 { color: #fff; font-size: clamp(24px, 2.8vw, 34px); margin-bottom: 16px; }
.imm-content p { color: var(--tx2); font-size: 15px; margin-bottom: 12px; }
.imm-points { display: flex; flex-wrap: wrap; gap: 9px; margin: 18px 0 26px; }
.imm-points i {
  font-style: normal; font-size: 12.5px; padding: 6px 14px;
  border: 1px solid var(--line); border-radius: 2px; color: var(--tx2);
  background: rgba(6,11,20,.4);
}
.imm-link { display: inline-flex; align-items: center; gap: 8px; color: var(--cy); font-weight: 600; font-size: 15px; }
.imm-link svg { width: 16px; height: 16px; transition: transform .22s; }
.imm-link:hover svg { transform: translateX(5px); }

/* ---------- 技术平台 ---------- */
.plat-row { display: grid; grid-template-columns: 1fr 1.25fr; gap: 64px; align-items: center; padding: 56px 0; }
.plat-row + .plat-row { border-top: 1px solid var(--line-soft); }
.plat-row:nth-child(even) .plat-shot { order: -1; }
.plat-no { font-size: 12.5px; font-weight: 700; letter-spacing: .26em; color: var(--tx3); margin-bottom: 12px; }
.plat-info h3 { font-size: 23px; color: #fff; margin-bottom: 12px; }
.plat-info p { color: var(--tx2); font-size: 15px; margin-bottom: 16px; }
.plat-chips { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 20px; }
.plat-chips i { font-style: normal; font-size: 12.5px; padding: 5px 13px; border: 1px solid var(--line); border-radius: 2px; color: var(--tx2); }
.plat-link { display: inline-flex; align-items: center; gap: 7px; color: var(--cy); font-weight: 600; font-size: 14.5px; }
.plat-link svg { width: 15px; height: 15px; transition: transform .22s; }
.plat-link:hover svg { transform: translateX(4px); }
.plat-shot {
  border: 1px solid var(--line); border-radius: 8px; overflow: hidden;
  background: var(--bg-2); box-shadow: 0 34px 90px rgba(0,0,0,.55);
}
.plat-shot .bar { display: flex; gap: 6px; padding: 11px 15px; background: rgba(255,255,255,.04); border-bottom: 1px solid var(--line-soft); }
.plat-shot .bar i { width: 9px; height: 9px; border-radius: 50%; background: rgba(148,180,210,.25); }
.plat-shot img { width: 100%; }
.plat-shot figcaption { padding: 11px 17px; font-size: 12px; color: var(--tx3); border-top: 1px solid var(--line-soft); }

/* ---------- 解决方案行 ---------- */
.sol-rows { border-top: 1px solid var(--line-soft); }
.sol-row {
  display: grid; grid-template-columns: 90px 1fr auto; gap: 26px; align-items: center;
  padding: 30px 12px; border-bottom: 1px solid var(--line-soft);
  transition: background .22s, padding .22s;
}
.sol-row:hover { background: rgba(58,200,220,.05); padding-left: 24px; }
.sol-row .no { font-size: 14px; font-weight: 750; color: var(--tx3); font-variant-numeric: tabular-nums; }
.sol-row b { display: block; color: #fff; font-size: 18.5px; font-weight: 650; margin-bottom: 4px; }
.sol-row p { color: var(--tx2); font-size: 14px; max-width: 720px; }
.sol-row .go { width: 20px; height: 20px; color: var(--tx3); transition: all .22s; }
.sol-row:hover .go { color: var(--cy); transform: translateX(5px); }

/* ---------- 案例行 ---------- */
.case-row {
  display: grid; grid-template-columns: 240px 1fr auto; gap: 40px; align-items: center;
  padding: 42px 12px; border-bottom: 1px solid var(--line-soft); transition: background .22s;
}
.case-row:first-child { border-top: 1px solid var(--line-soft); }
.case-row:hover { background: rgba(58,200,220,.04); }
.case-row .metric b { display: block; font-size: 42px; font-weight: 800; color: #fff; line-height: 1; font-variant-numeric: tabular-nums; }
.case-row .metric b i { font-style: normal; font-size: 20px; color: var(--cy); }
.case-row .metric span { font-size: 13px; color: var(--tx3); display: block; margin-top: 6px; }
.case-row .tag { display: inline-block; font-size: 12px; letter-spacing: .14em; padding: 4px 13px; border: 1px solid var(--line); border-radius: 2px; color: var(--tx2); margin-bottom: 10px; }
.case-row h4 { font-size: 19px; color: #fff; margin-bottom: 8px; }
.case-row .case-desc { color: var(--tx2); font-size: 14px; max-width: 640px; }
.case-row .go { width: 20px; height: 20px; color: var(--tx3); transition: all .22s; }
.case-row:hover .go { color: var(--cy); transform: translateX(5px); }

/* ---------- 内页 Hero ---------- */
.page-hero {
  position: relative; min-height: 62vh; display: flex; align-items: flex-end;
  background: var(--bg) center/cover no-repeat;
}
.page-hero::before {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(6,11,20,.7), rgba(6,11,20,.42) 45%, var(--bg) 100%);
}
.page-hero .container { position: relative; z-index: 2; padding-bottom: 56px; }
.breadcrumb { color: rgba(255,255,255,.5); font-size: 13px; }
.breadcrumb a { color: rgba(255,255,255,.75); }
.breadcrumb a:hover { color: var(--cy); }
.breadcrumb i { font-style: normal; margin: 0 9px; opacity: .45; }
.page-hero h1 { color: #fff; font-size: clamp(28px, 3.9vw, 46px); font-weight: 800; margin-top: 14px; }
.page-hero .page-sub { color: rgba(255,255,255,.66); margin-top: 16px; max-width: 740px; font-size: 15.5px; }

/* ---------- 图文分栏 ---------- */
.split { display: grid; grid-template-columns: 1fr 1.1fr; gap: 64px; align-items: center; }
.split-reverse .split-text { order: 2; }
.kicker { font-size: 12.5px; font-weight: 600; letter-spacing: .3em; color: var(--cy); text-transform: uppercase; margin-bottom: 14px; }
.split-text h3 { font-size: clamp(22px, 2.4vw, 28px); color: #fff; margin-bottom: 16px; }
.split-text p { color: var(--tx2); font-size: 15px; margin-bottom: 13px; }
.frame { border: 1px solid var(--line); border-radius: 8px; overflow: hidden; background: var(--bg-2); box-shadow: 0 28px 70px rgba(0,0,0,.5); }
.frame img { width: 100%; }
.frame figcaption { padding: 11px 18px; font-size: 12px; color: var(--tx3); border-top: 1px solid var(--line-soft); background: rgba(255,255,255,.03); }
.photo { border-radius: 6px; overflow: hidden; border: 1px solid var(--line-soft); }
.photo img { width: 100%; height: 100%; object-fit: cover; }
.photo-cap { font-size: 12.5px; color: var(--tx3); margin-top: 10px; letter-spacing: .06em; }

/* ---------- 流程步骤 ---------- */
.flow-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; counter-reset: flow; }
.flow-step { padding: 28px 22px; background: var(--bg-2); border: 1px solid var(--line-soft); border-top: 2px solid var(--tx3); transition: all .22s; }
.flow-step:hover { border-top-color: var(--cy); transform: translateY(-3px); }
.flow-step::before { counter-increment: flow; content: counter(flow, decimal-leading-zero); font-size: 22px; font-weight: 800; color: var(--tx3); display: block; margin-bottom: 10px; }
.flow-step h5 { font-size: 15.5px; color: #fff; margin-bottom: 5px; }
.flow-step p { font-size: 13px; color: var(--tx2); line-height: 1.65; }

/* ---------- 能力卡 ---------- */
.cap-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line-soft); border: 1px solid var(--line-soft); }
.cap-card { background: var(--bg-2); padding: 32px 28px; transition: background .22s; }
.cap-card:hover { background: var(--bg-3); }
.cap-card h5 { font-size: 16px; color: #fff; margin-bottom: 8px; padding-left: 14px; position: relative; }
.cap-card h5::before { content: ""; position: absolute; left: 0; top: 6px; bottom: 6px; width: 3px; background: var(--cy); }
.cap-card p { font-size: 13.5px; color: var(--tx2); line-height: 1.75; }

/* ---------- CTA ---------- */
.cta { position: relative; overflow: hidden; }
.cta-bg { position: absolute; inset: -10% 0; background: url("assets/img/cta-hall.jpg") center/cover no-repeat; will-change: transform; }
.cta::before { content: ""; position: absolute; inset: 0; z-index: 1; background: linear-gradient(90deg, rgba(6,11,20,.94) 10%, rgba(6,11,20,.72) 55%, rgba(6,11,20,.5)); }
.cta-inner { position: relative; z-index: 2; padding: 110px 0; display: flex; align-items: center; justify-content: space-between; gap: 44px; flex-wrap: wrap; }
.cta h2 { font-size: clamp(25px, 2.9vw, 36px); color: #fff; }
.cta p { color: var(--tx2); margin-top: 12px; max-width: 560px; font-size: 15px; }
.cta .cta-list { margin-top: 22px; display: flex; flex-wrap: wrap; gap: 10px 26px; }
.cta .cta-list span { font-size: 13.5px; color: var(--tx2); display: inline-flex; align-items: center; gap: 8px; }
.cta .cta-list span::before { content: ""; width: 5px; height: 5px; border-radius: 50%; background: var(--cy); }

/* ---------- 页脚 ---------- */
.footer { background: #04080F; border-top: 1px solid var(--line-soft); color: var(--tx2); }
.footer-top {
  display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.1fr; gap: 48px;
  padding: 68px 0 52px;
}
.footer .logo-text { color: #fff; }
.footer-brand p { font-size: 13.5px; margin-top: 14px; max-width: 300px; line-height: 1.85; color: var(--tx2); }
.footer h6 { color: rgba(255,255,255,.85); font-size: 14px; letter-spacing: .08em; margin-bottom: 16px; font-weight: 650; }
.footer-col { display: flex; flex-direction: column; gap: 10px; }
.footer-col a { font-size: 13.5px; transition: color .2s; }
.footer-col a:hover { color: var(--cy); }
.footer-col p { font-size: 13.5px; line-height: 1.8; }
.footer-bottom { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; padding: 24px 0; font-size: 12.5px; color: var(--tx3); border-top: 1px solid var(--line-soft); }
.icp-link { color: var(--tx3); text-decoration: none; transition: color .2s; }
.icp-link:hover { color: var(--cy); text-decoration: underline; }

/* ---------- 解决方案页分区 ---------- */
.sol-section { padding: 56px; border: 1px solid var(--line-soft); background: var(--bg-2); border-radius: 8px; scroll-margin-top: 96px; }
.sol-section + .sol-section { margin-top: 28px; }
.sol-section-head { display: flex; align-items: baseline; gap: 18px; margin-bottom: 32px; flex-wrap: wrap; }
.sol-section-head .sol-no { font-size: 13px; font-weight: 750; color: var(--cy); letter-spacing: .2em; }
.sol-section-head h3 { font-size: clamp(20px, 2.2vw, 26px); color: #fff; }
.sol-section-head .sol-en { color: var(--tx3); font-size: 12px; letter-spacing: .28em; margin-left: auto; }

/* ---------- 案例详情页 ---------- */
.case-detail {
  display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center;
  padding: 56px; border: 1px solid var(--line-soft); background: var(--bg-2); border-radius: 8px;
}
.case-detail + .case-detail { margin-top: 28px; }
.case-detail:nth-child(even) .case-info { order: 2; }
.case-detail .case-photo { border-radius: 6px; overflow: hidden; border: 1px solid var(--line-soft); }
.case-detail .case-photo img { width: 100%; height: 100%; object-fit: cover; }
.case-tag { display: inline-block; font-size: 12px; letter-spacing: .14em; padding: 5px 14px; border: 1px solid var(--line); color: var(--tx2); border-radius: 2px; margin-bottom: 14px; }
.case-info h3 { font-size: clamp(19px, 2.1vw, 24px); color: #fff; margin-bottom: 14px; }
.case-info h6 { font-size: 13px; color: var(--cy); letter-spacing: .12em; margin: 16px 0 6px; }
.case-info p { font-size: 14px; color: var(--tx2); }
.case-figures { display: flex; gap: 12px; margin-top: 22px; flex-wrap: wrap; }
.case-figures .fig { flex: 1; min-width: 110px; border: 1px solid var(--line-soft); border-top: 2px solid var(--cy); padding: 15px 12px; text-align: center; }
.case-figures .fig b { display: block; font-size: 23px; color: #fff; font-weight: 800; font-variant-numeric: tabular-nums; }
.case-figures .fig b i { font-style: normal; font-size: 13px; color: var(--cy); }
.case-figures .fig span { font-size: 12px; color: var(--tx2); }

/* ---------- 关于页时间线 ---------- */
.timeline { border-top: 1px solid var(--line-soft); margin-top: 8px; }
.timeline-item { display: grid; grid-template-columns: 160px 1fr; gap: 30px; padding: 30px 6px; border-bottom: 1px solid var(--line-soft); }
.timeline-item h5 { font-size: 17px; color: #fff; }
.timeline-item .t-no { font-size: 12.5px; font-weight: 750; color: var(--cy); letter-spacing: .2em; margin-bottom: 4px; }
.timeline-item p { font-size: 14.5px; color: var(--tx2); max-width: 760px; }

/* ---------- 联系页 ---------- */
.contact-wrap { display: grid; grid-template-columns: 1fr 1.1fr; gap: 64px; align-items: start; }
.contact-info h3 { font-size: 22px; color: #fff; margin-bottom: 20px; }
.contact-line { display: grid; grid-template-columns: 92px 1fr; gap: 18px; padding: 18px 0; border-bottom: 1px solid var(--line-soft); font-size: 14.5px; }
.contact-line b { color: var(--tx3); font-weight: 600; font-size: 13px; letter-spacing: .1em; padding-top: 2px; }
.form-card { border: 1px solid var(--line-soft); padding: 40px; background: var(--bg-2); border-radius: 8px; }
.form-card h4 { font-size: 19px; color: #fff; margin-bottom: 24px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-field { margin-bottom: 16px; }
.form-field label { display: block; font-size: 13.5px; font-weight: 600; color: var(--tx); margin-bottom: 7px; }
.form-field input, .form-field textarea, .form-field select {
  width: 100%; padding: 12px 15px; border: 1px solid var(--line); border-radius: 3px;
  font-size: 14px; font-family: inherit; background: rgba(255,255,255,.04); color: var(--tx);
  outline: none; transition: border .2s, background .2s;
}
.form-field input::placeholder, .form-field textarea::placeholder { color: var(--tx3); }
.form-field input:focus, .form-field textarea:focus, .form-field select:focus { border-color: var(--cy); background: rgba(58,200,220,.05); }
.form-field .err { color: #E0705C; font-size: 12.5px; margin-top: 5px; display: none; }
.form-field.invalid input, .form-field.invalid textarea { border-color: #E0705C; }
.form-field.invalid .err { display: block; }
.form-ok { display: none; margin-top: 16px; padding: 13px 16px; border: 1px solid rgba(58,200,220,.4); background: rgba(58,200,220,.08); color: var(--cy); font-size: 13.5px; border-radius: 3px; }
.form-note { font-size: 12.5px; color: var(--tx3); margin-top: 14px; }

/* ---------- 滚动显现 ---------- */
.reveal { opacity: 0; transform: translateY(30px); transition: opacity .75s ease, transform .75s ease; }
.reveal.visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .hero-bg, .imm-bg, .cta-bg { transform: none !important; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1000px) {
  .tile-grid { grid-template-columns: 1fr 1fr; }
  .fusion-grid { grid-template-columns: 1fr 1fr; }
  .plat-row, .split, .case-detail, .contact-wrap { grid-template-columns: 1fr; gap: 36px; }
  .plat-row:nth-child(even) .plat-shot, .split-reverse .split-text { order: 0; }
  .cap-grid { grid-template-columns: 1fr 1fr; }
  .flow-grid { grid-template-columns: repeat(2, 1fr); }
  .case-row { grid-template-columns: 150px 1fr; }
  .case-row .go { display: none; }
  .footer-top { grid-template-columns: 1fr 1fr; gap: 36px; }
  .sol-section, .case-detail { padding: 36px 26px; }
}
@media (max-width: 720px) {
  .section { padding: 76px 0; }
  .nav-links {
    position: fixed; top: 0; right: -100%; height: 100vh; width: min(78vw, 320px);
    flex-direction: column; align-items: flex-start; justify-content: center; gap: 22px;
    padding: 0 34px; background: rgba(6,11,20,.97); backdrop-filter: blur(16px);
    transition: right .35s ease; overflow-y: auto;
  }
  .nav.open .nav-links { right: 0; }
  .nav-links > a, .nav-item > a { color: var(--tx); }
  .nav-toggle { display: flex; z-index: 101; }
  .nav.open .nav-toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav.open .nav-toggle span:nth-child(2) { opacity: 0; }
  .nav.open .nav-toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  .nav-links .nav-item { width: 100%; }
  .dropdown-menu {
    position: static; transform: none; opacity: 1; visibility: visible;
    box-shadow: none; background: transparent; border: none;
    padding: 2px 0 0 16px; display: none; min-width: 0;
  }
  .nav-item.expanded .dropdown-menu { display: block; }
  .dropdown-menu a { color: var(--tx2) !important; padding: 8px 10px; }
  .tile-grid { grid-template-columns: 1fr; }
  .tile { height: 220px; }
  .fusion-grid { grid-template-columns: 1fr; }
  .hero { min-height: 100svh; }
  .imm { min-height: 72vh; }
  .imm::before, .imm.alt::before { background: linear-gradient(180deg, rgba(6,11,20,.55), rgba(6,11,20,.92) 78%); }
  .imm-content { padding: 70px 0; }
  .strip-inner { flex-wrap: wrap; }
  .strip .strip-item { flex: 1 1 46%; padding: 20px 16px; }
  .strip .strip-item:nth-child(odd) { border-left: none; padding-left: 0; }
  .strip .strip-item:nth-child(n+3) { border-top: 1px solid var(--line-soft); }
  .flow-grid, .cap-grid, .form-row { grid-template-columns: 1fr; }
  .case-row { grid-template-columns: 1fr; gap: 14px; }
  .footer-top { grid-template-columns: 1fr; gap: 32px; }
  .sol-row { grid-template-columns: 44px 1fr; }
  .sol-row .go { display: none; }
  .timeline-item { grid-template-columns: 1fr; gap: 8px; }
  .cta-inner { padding: 76px 0; }
  .plat-row { gap: 30px; }
}

/* ==========================================================
   v3.1 修订：品牌 logo / 全称 / 导航直达 / 渐变提亮 / 字号加大
   ========================================================== */

/* ---------- 品牌 logo 与全称 ---------- */
.logo-img { height: 46px; width: auto; display: block; }
.logo-text { font-size: 16.5px; font-weight: 700; letter-spacing: .04em; }
.logo-text small { font-size: 8.5px; letter-spacing: .22em; }
.nav-links { gap: 26px; }
.footer-logo { height: 56px; }
.footer-brand-row { display: flex; align-items: center; gap: 14px; margin-bottom: 6px; }

/* ---------- 下拉菜单：更丰富的直达入口 ---------- */
.dropdown-menu { min-width: 320px; }
.dropdown-menu .dd-sep { display: block; height: 1px; background: var(--line-soft); margin: 6px 10px; }
.dropdown-menu a b { font-size: 14px; }
.dropdown-menu a small { font-size: 12px; color: var(--tx3); }
.dropdown-menu a:hover b { color: var(--cy); }

/* ---------- 首屏：更大更居中的文字 ---------- */
.hero-content { padding-top: 40px; }
.hero-brand { margin-bottom: 30px; }
.hero-brand img { height: 62px; }
.hero-brand span { font-size: 21px; font-weight: 700; letter-spacing: .12em; }
.hero-brand small { font-size: 10px; letter-spacing: .34em; }
.hero-sub {
  font-size: clamp(17px, 1.8vw, 21px); color: rgba(255,255,255,.88);
  font-weight: 500; letter-spacing: .28em; margin: 24px 0 6px;
}
.hero-tags {
  display: flex; align-items: center; justify-content: center; flex-wrap: wrap;
  gap: 12px 0; margin: 0 auto 40px; max-width: 760px;
}
.hero-tags span { color: rgba(255,255,255,.75); font-size: 14.5px; }
.hero-tags i { width: 4px; height: 4px; border-radius: 50%; background: var(--cy); margin: 0 14px; display: inline-block; opacity: .8; }
.hero-actions { padding-bottom: 76px; }

/* ---------- 渐变提亮：分区光晕 ---------- */
#tiles {
  background:
    radial-gradient(52% 42% at 12% 0%, rgba(58,200,220,.10), transparent 70%),
    radial-gradient(45% 40% at 92% 8%, rgba(90,120,255,.08), transparent 70%),
    var(--bg);
}
#fusion {
  background:
    radial-gradient(48% 40% at 85% 6%, rgba(58,200,220,.09), transparent 72%),
    radial-gradient(40% 36% at 8% 90%, rgba(90,120,255,.07), transparent 70%),
    var(--bg);
}
#platform {
  background:
    linear-gradient(180deg, var(--bg) 0%, #0A1526 50%, var(--bg) 100%);
}
.sec-title {
  background: linear-gradient(95deg, #FFFFFF 30%, #9BDDE7 100%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.tile-no { letter-spacing: .3em; }

/* ---------- 介绍文字加大 ---------- */
.tile-body b { font-size: 19.5px; }
.tile-body span { font-size: 14.5px; color: var(--tx2); }
.tile-body { padding: 26px 28px; }
.fusion-item { padding: 34px 30px; cursor: pointer; }
.fusion-item b { font-size: 17.5px; }
.fusion-item p { font-size: 14.5px; line-height: 1.8; }
.fusion-item u {
  text-decoration: none; color: var(--cy); font-size: 13.5px; font-weight: 600;
  display: inline-block; margin-top: 8px; transition: transform .22s;
}
.fusion-item:hover u { transform: translateX(4px); }
.fusion-item { position: relative; }
.fusion-item::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 2px;
  background: linear-gradient(90deg, var(--cy), transparent);
  transform: scaleX(0); transform-origin: left; transition: transform .3s;
}
.fusion-item:hover::after { transform: scaleX(1); }
.imm-points i { font-size: 13.5px; padding: 7px 16px; color: var(--tx); border-color: rgba(148,180,210,.22); }
.imm-content p { font-size: 15.5px; }
.imm-kicker { color: var(--cy) !important; font-size: 15px !important; letter-spacing: .04em; }
.sol-row p { font-size: 14.5px; }
.case-row .case-desc { font-size: 14.5px; }
.cap-card p { font-size: 14.5px; line-height: 1.8; }
.strip-item span { font-size: 13.5px; color: var(--tx2); }
.sec-desc { font-size: 16px; color: var(--tx2); }
.plat-info p { font-size: 15.5px; }

/* ---------- 沉浸式分区渐变提亮 ---------- */
.imm::before { z-index: 1; }
.imm .container { position: relative; z-index: 2; }
.imm-no { letter-spacing: .34em; }

@media (max-width: 720px) {
  .logo-img { height: 38px; }
  .logo-text { font-size: 14px; }
  .logo-text small { font-size: 7.5px; }
  .hero-brand img { height: 52px; }
  .hero-brand span { font-size: 17px; }
  .hero-sub { letter-spacing: .18em; }
  .hero-tags span { font-size: 13px; }
  .hero-tags i { margin: 0 9px; }
  .fusion-item { padding: 28px 24px; }
}

/* ==========================================================
   v3.2：核心业务下拉改为顶部横向大面板（mega menu）
   ========================================================== */
@media (min-width: 1001px) {
  .dropdown-menu.mega {
    position: fixed; left: 0; right: 0; top: 90px;
    width: auto; min-width: 0; transform: none;
    display: grid; grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 6px 10px; padding: 20px max(24px, calc((100% - 1240px) / 2)) 24px;
    border-radius: 0; border-left: none; border-right: none;
    background: rgba(8, 14, 26, .97);
  }
  .nav-item:hover .dropdown-menu.mega { transform: none; }
  /* 悬停桥：面板上方的隐形过渡区，防止鼠标移过去时面板消失 */
  .dropdown-menu.mega::before {
    content: ""; position: absolute; left: 0; right: 0;
    top: -46px; height: 46px;
  }
  .dropdown-menu.mega .mega-head {
    grid-column: 1 / -1;
    font-size: 12px; font-weight: 600; letter-spacing: .2em;
    color: var(--cy); padding: 4px 8px 12px;
    border-bottom: 1px solid var(--line-soft); margin-bottom: 8px;
  }
  .dropdown-menu.mega a {
    padding: 15px 16px; border: 1px solid transparent;
    border-radius: 4px; background: rgba(255,255,255,.015);
  }
  .dropdown-menu.mega a:hover {
    background: rgba(58,200,220,.09); border-color: var(--line-soft);
  }
  .dropdown-menu.mega a b { font-size: 15px; }
  .dropdown-menu.mega a small { font-size: 12.5px; margin-top: 4px; line-height: 1.55; }
}

/* ==========================================================
   v3.3：核心业务 6 大业务平铺进顶部导航一排（宽屏）
   ========================================================== */
.biz-flat { display: none; }
@media (min-width: 1300px) {
  .nav-inner.container { max-width: 1480px; }
  .nav-links { gap: 18px; }
  .biz-flat { display: contents; }
  .nav-biz-drop { display: none; }
  .biz-flat a {
    color: rgba(255,255,255,.78); font-size: 15px; font-weight: 500;
    position: relative; transition: color .25s; white-space: nowrap;
  }
  .biz-flat a::after {
    content: ""; position: absolute; left: 0; bottom: -7px;
    width: 0; height: 2px; background: var(--cy); transition: width .25s;
  }
  .biz-flat a:hover { color: #fff; }
  .biz-flat a:hover::after { width: 100%; }
  .biz-flat a.active { color: var(--cy); }
  .biz-flat a.active::after { width: 100%; }
}

/* ==========================================================
   v3.4：全站渐变体系（去纯黑 · 深空蓝 → 宝蓝 → 深青 → 靛紫）
   目标：屏幕上能明显看到颜色层次，同时保持高端暗色质感
   ========================================================== */

/* ---------- 1. 全站底色：多层大色域渐变 ---------- */
body {
  background-color: #0A1728;
  background-image:
    radial-gradient(58% 46% at 4% -8%, rgba(91,119,255,.40), transparent 62%),
    radial-gradient(52% 44% at 100% 0%, rgba(47,216,232,.34), transparent 64%),
    radial-gradient(66% 54% at 48% 42%, rgba(139,92,246,.26), transparent 68%),
    radial-gradient(50% 42% at 96% 86%, rgba(33,212,192,.26), transparent 64%),
    radial-gradient(48% 42% at 0% 76%, rgba(59,102,241,.30), transparent 66%),
    linear-gradient(158deg, #0B1B33 0%, #0D2544 26%, #0A2739 52%, #131B3C 78%, #0B1B33 100%);
  background-repeat: no-repeat;
  background-attachment: fixed;
}
::selection { background: rgba(47,216,232,.30); color: #fff; }
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: #0A1526; }
::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, #2FD8E8, #5B77FF);
  border-radius: 6px; border: 2px solid #0A1526;
}
::-webkit-scrollbar-thumb:hover { background: linear-gradient(180deg, #5AE6F2, #7C93FF); }

/* ---------- 2. 导航：玻璃渐变 ---------- */
.nav.scrolled {
  background: linear-gradient(180deg, rgba(12,30,54,.94) 0%, rgba(10,22,42,.86) 100%);
  backdrop-filter: blur(18px) saturate(1.25);
  box-shadow: 0 1px 0 rgba(120,200,230,.16), 0 14px 44px rgba(4,12,24,.55);
}
.dropdown-menu { background: linear-gradient(165deg, rgba(15,34,60,.98), rgba(11,24,44,.98)); }
.dropdown-menu.mega { background: linear-gradient(165deg, rgba(14,32,58,.98), rgba(10,22,42,.98)) !important; }
@media (max-width: 720px) {
  .nav-links { background: linear-gradient(180deg, rgba(11,26,48,.98), rgba(8,18,34,.99)); }
}

/* ---------- 3. 首屏：彩色光晕 + 渐变标题 ---------- */
.hero::before {
  background:
    radial-gradient(ellipse 62% 48% at 50% 24%, rgba(10,23,40,.52), transparent 74%),
    radial-gradient(40% 34% at 16% 66%, rgba(47,216,232,.26), transparent 70%),
    radial-gradient(38% 32% at 84% 60%, rgba(91,119,255,.24), transparent 70%),
    linear-gradient(180deg, rgba(10,23,40,.80) 0%, rgba(10,23,40,.34) 30%, rgba(10,23,40,.44) 60%, rgba(10,23,40,.76) 86%, rgba(10,23,40,0) 100%);
}
.hero h1 {
  background: linear-gradient(96deg, #FFFFFF 0%, #EAF6FF 34%, #9CE9F4 68%, #AFBAFF 100%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 6px 28px rgba(20,80,130,.45));
}
.hero h1 em {
  background: linear-gradient(96deg, #5FE3F5 0%, #7C9BFF 58%, #B98CFF 100%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-sub { color: rgba(224,240,255,.9); }

/* ---------- 4. 数据条：横向渐变带 ---------- */
.strip {
  background:
    linear-gradient(90deg, rgba(47,216,232,.16) 0%, rgba(91,119,255,.20) 46%, rgba(139,92,246,.18) 100%);
  border-top: 1px solid rgba(120,200,230,.20);
  backdrop-filter: blur(10px);
}
.strip-item b { color: #fff; text-shadow: 0 0 26px rgba(47,216,232,.35); }

/* ---------- 5. 分区：不同色相的渐变舞台 ---------- */
.section {
  background:
    radial-gradient(70% 46% at 50% 0%, rgba(91,119,255,.10), transparent 72%);
}
#tiles {
  background:
    radial-gradient(46% 38% at 12% 4%, rgba(47,216,232,.28), transparent 68%),
    radial-gradient(44% 36% at 92% 10%, rgba(91,119,255,.26), transparent 68%),
    linear-gradient(180deg, rgba(10,23,40,0) 0%, rgba(11,42,66,.42) 52%, rgba(10,23,40,0) 100%);
}
#fusion {
  background:
    radial-gradient(44% 36% at 88% 6%, rgba(139,92,246,.28), transparent 68%),
    radial-gradient(42% 34% at 4% 90%, rgba(33,212,192,.24), transparent 66%),
    linear-gradient(180deg, rgba(10,23,40,0) 0%, rgba(30,26,74,.46) 50%, rgba(10,23,40,0) 100%);
}
#platform {
  background:
    radial-gradient(52% 42% at 50% 0%, rgba(47,216,232,.24), transparent 72%),
    radial-gradient(44% 36% at 8% 84%, rgba(91,119,255,.20), transparent 68%),
    linear-gradient(180deg, rgba(10,23,40,0) 0%, rgba(8,38,58,.46) 52%, rgba(10,23,40,0) 100%);
}
#solutions-entry {
  background:
    radial-gradient(50% 40% at 18% 20%, rgba(59,102,241,.24), transparent 70%),
    radial-gradient(46% 38% at 88% 78%, rgba(47,216,232,.18), transparent 68%);
}
#cases-entry {
  background:
    radial-gradient(48% 40% at 82% 16%, rgba(139,92,246,.22), transparent 70%),
    radial-gradient(44% 36% at 10% 84%, rgba(59,102,241,.20), transparent 68%);
}

/* ---------- 6. 卡片：渐变玻璃质感，不再是纯黑块 ---------- */
.tile { border-color: rgba(120,190,230,.18); }
.tile::before {
  background: linear-gradient(186deg, rgba(8,20,38,.04) 24%, rgba(8,24,44,.62) 70%, rgba(10,30,56,.94) 100%);
}
.tile:hover {
  border-color: rgba(47,216,232,.60);
  box-shadow: 0 22px 54px rgba(6,26,48,.6), 0 0 0 1px rgba(47,216,232,.22) inset;
}
.tile img { filter: saturate(1.14) brightness(1.12) contrast(1.02); }

.fusion-item, .cap-card, .flow-step, .form-card,
.sol-section, .case-detail, .plat-shot, .frame {
  background: linear-gradient(152deg, rgba(24,56,98,.90) 0%, rgba(14,34,62,.94) 46%, rgba(24,32,74,.90) 100%);
  border-color: rgba(120,180,230,.20);
}
.fusion-item:hover, .cap-card:hover { background: linear-gradient(152deg, rgba(30,68,116,.95), rgba(18,40,72,.96) 50%, rgba(32,38,88,.95)); }
.flow-step:hover { background: linear-gradient(152deg, rgba(28,64,110,.95), rgba(16,38,68,.96)); }
.plat-shot { box-shadow: 0 34px 90px rgba(6,22,44,.66); }
.cap-card h5::before { background: linear-gradient(180deg, #2FD8E8, #5B77FF); }
.flow-step::before { background: linear-gradient(100deg, #2FD8E8, #5B77FF, #8B5CF6); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.case-figures .fig { border-top: 2px solid #2FD8E8; }

/* ---------- 7. 沉浸式业务行：遮罩带蓝紫调 ---------- */
.imm::before {
  background: linear-gradient(78deg, rgba(8,22,42,.90) 4%, rgba(10,32,56,.62) 46%, rgba(14,26,52,.18) 88%);
}
.imm.alt::before {
  background: linear-gradient(282deg, rgba(8,22,42,.90) 4%, rgba(20,28,62,.62) 46%, rgba(14,26,52,.18) 88%);
}
.imm-bg { filter: saturate(1.12) brightness(1.08); }
.imm-points i { background: rgba(14,36,64,.55); border-color: rgba(120,190,230,.26); }

/* ---------- 8. 内页 Hero：彩色渐入 ---------- */
.page-hero::before {
  background:
    radial-gradient(46% 52% at 80% 18%, rgba(47,216,232,.26), transparent 70%),
    radial-gradient(40% 46% at 12% 70%, rgba(91,119,255,.22), transparent 70%),
    linear-gradient(180deg, rgba(10,23,40,.74) 0%, rgba(10,26,48,.46) 40%, rgba(10,24,44,.70) 84%, rgba(10,23,40,0) 100%);
}

/* ---------- 9. 流程 / 表格 / 其他细节 ---------- */
.sol-row:hover { background: linear-gradient(90deg, rgba(47,216,232,.10), rgba(91,119,255,.06) 60%, transparent); }
.case-row:hover { background: linear-gradient(90deg, rgba(139,92,246,.10), rgba(47,216,232,.05) 60%, transparent); }
.timeline-item, .sol-row, .case-row { border-color: rgba(148,190,230,.14); }

/* ---------- 10. CTA：蓝紫渐变遮罩 ---------- */
.cta::before {
  background:
    radial-gradient(50% 60% at 88% 30%, rgba(47,216,232,.22), transparent 70%),
    linear-gradient(96deg, rgba(8,22,42,.94) 4%, rgba(14,34,68,.80) 46%, rgba(36,26,74,.62) 100%);
}

/* ---------- 11. 页脚：靛蓝渐变收尾 ---------- */
.footer {
  background:
    radial-gradient(48% 70% at 10% -6%, rgba(47,216,232,.16), transparent 70%),
    radial-gradient(46% 66% at 90% 4%, rgba(139,92,246,.20), transparent 70%),
    linear-gradient(180deg, #0B1E38 0%, #0C1B33 42%, #091426 100%);
  border-top: 1px solid rgba(120,200,230,.20);
}
.footer-bottom { border-top-color: rgba(148,190,230,.14); }

/* ---------- 12. 按钮与标题：渐变强调 ---------- */
.btn-primary {
  background: linear-gradient(100deg, #2FD8E8 0%, #4FA8FF 54%, #6E7BFF 100%);
  color: #04121C;
  box-shadow: 0 10px 30px rgba(47,216,232,.26);
}
.btn-primary:hover {
  background: linear-gradient(100deg, #5AE6F2 0%, #6FBBFF 54%, #8C97FF 100%);
  box-shadow: 0 16px 42px rgba(47,216,232,.38);
}
.btn-ghost { border-color: rgba(160,220,255,.45); background: rgba(18,42,72,.35); backdrop-filter: blur(6px); }
.btn-ghost:hover { border-color: var(--cy); color: #fff; background: rgba(47,216,232,.14); }

.sec-title {
  background: linear-gradient(96deg, #FFFFFF 16%, #B7ECF6 56%, #A9B5FF 100%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.breadcrumb a:hover, .imm-link, .plat-link { color: #4FE0EF; }

/* ---------- 13. 移动端：固定背景降级 ---------- */
@media (max-width: 900px) {
  body { background-attachment: scroll; }
  .strip { background: linear-gradient(100deg, rgba(47,216,232,.16), rgba(91,119,255,.20), rgba(139,92,246,.16)); }
}

/* ==========================================================
   v3.5：渐变连贯性修订
   去掉「每个区块各自一团光」造成的断层，改为
   —— 整页一条纵向渐变走廊，区块背景全部透空，上下自然吻合
   ========================================================== */

/* ---------- 1. 整页一条纵向渐变（铺满整个文档高度，滚动时连续过渡） ---------- */
body {
  background-color: #0B1A30;
  background-image:
    radial-gradient(58% 15% at 84% 3%, rgba(47,216,232,.15), transparent 72%),
    radial-gradient(54% 13% at 10% 21%, rgba(91,119,255,.17), transparent 72%),
    radial-gradient(56% 14% at 88% 43%, rgba(47,216,232,.11), transparent 74%),
    radial-gradient(58% 14% at 12% 65%, rgba(139,92,246,.15), transparent 74%),
    radial-gradient(54% 13% at 84% 87%, rgba(91,119,255,.13), transparent 74%),
    linear-gradient(180deg,
      #0B1C36 0%,
      #0D2546 11%,
      #0C2E4E 24%,
      #0B3450 36%,
      #123453 48%,
      #1A2C56 60%,
      #22245A 71%,
      #1A2A50 82%,
      #11223F 92%,
      #0B182C 100%);
  background-repeat: no-repeat;
  background-size: 100% 100%;
  background-attachment: scroll;
}

/* ---------- 2. 区块背景全部透空：不再各自打光，色带自然衔接 ---------- */
.section,
#tiles,
#fusion,
#platform,
#solutions-entry,
#cases-entry,
.imm {
  background: none;
}

/* ---------- 3. 卡片改半透明：让底层渐变色透上来，卡片与所在位置同色系 ---------- */
.fusion-item, .cap-card, .flow-step, .form-card,
.sol-section, .case-detail, .plat-shot, .frame {
  background: linear-gradient(160deg, rgba(22,50,88,.70) 0%, rgba(15,36,64,.76) 100%);
  border-color: rgba(120,180,230,.18);
}
.fusion-item:hover, .cap-card:hover, .flow-step:hover {
  background: linear-gradient(160deg, rgba(30,66,112,.80) 0%, rgba(20,42,76,.84) 100%);
}

/* 磁贴：遮罩跟着整体色带走，底部用蓝而不是纯黑 */
.tile::before {
  background: linear-gradient(186deg, rgba(11,28,50,.02) 22%, rgba(12,34,58,.58) 68%, rgba(14,40,68,.90) 100%);
}
.tile { border-color: rgba(120,190,230,.16); }

/* ---------- 4. 首屏 / 内页 Hero：底部渐隐到透明，和整页渐变无缝对接 ---------- */
.hero::before {
  background:
    radial-gradient(ellipse 60% 46% at 50% 26%, rgba(11,28,54,.46), transparent 76%),
    linear-gradient(180deg,
      rgba(11,28,54,.76) 0%,
      rgba(11,28,54,.32) 28%,
      rgba(11,28,54,.38) 56%,
      rgba(11,28,54,.58) 80%,
      rgba(11,28,54,.12) 96%,
      rgba(11,28,54,0) 100%);
}
.page-hero::before {
  background:
    radial-gradient(46% 52% at 80% 18%, rgba(47,216,232,.16), transparent 72%),
    linear-gradient(180deg,
      rgba(11,28,54,.70) 0%,
      rgba(11,28,54,.44) 40%,
      rgba(11,28,54,.56) 82%,
      rgba(11,28,54,.06) 97%,
      rgba(11,28,54,0) 100%);
}

/* ---------- 5. 数据条 / 沉浸行 / CTA：只用低饱和同色系叠加 ---------- */
.strip {
  background: linear-gradient(90deg, rgba(47,216,232,.10) 0%, rgba(91,119,255,.12) 52%, rgba(139,92,246,.09) 100%);
  border-top: 1px solid rgba(140,190,235,.14);
  border-bottom: 1px solid rgba(140,190,235,.08);
}
.imm::before {
  background: linear-gradient(78deg, rgba(10,26,46,.86) 4%, rgba(11,34,58,.56) 46%, rgba(14,28,54,.12) 88%);
}
.imm.alt::before {
  background: linear-gradient(282deg, rgba(10,26,46,.86) 4%, rgba(16,30,60,.56) 46%, rgba(14,28,54,.12) 88%);
}
.imm { border-top: 1px solid rgba(140,190,235,.09); }
.cta::before {
  background: linear-gradient(96deg, rgba(9,24,44,.90) 4%, rgba(14,34,64,.70) 48%, rgba(26,30,62,.58) 100%);
}

/* ---------- 6. 页脚：从透明渐入，与上一屏完全咬合 ---------- */
.footer {
  background: linear-gradient(180deg,
    rgba(10,26,46,0) 0%,
    rgba(10,25,45,.55) 20%,
    rgba(9,22,40,.86) 52%,
    rgba(7,17,32,.96) 100%);
  border-top: 1px solid rgba(140,190,235,.10);
}

/* ---------- 7. 标题 / 按钮渐变收敛到「白 → 青 → 蓝」，减少色相跳变 ---------- */
.hero h1 {
  background: linear-gradient(96deg, #FFFFFF 0%, #EAF6FF 36%, #9CE9F4 78%, #A8C4FF 100%);
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.hero h1 em {
  background: linear-gradient(96deg, #5FE3F5 0%, #6FC8FF 52%, #8FA8FF 100%);
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.sec-title {
  background: linear-gradient(96deg, #FFFFFF 20%, #BFE9F4 62%, #AFC0FF 100%);
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.btn-primary {
  background: linear-gradient(100deg, #2FD8E8 0%, #46A8FF 60%, #5E7BFF 100%);
  box-shadow: 0 10px 28px rgba(47,216,232,.20);
}
.btn-primary:hover {
  background: linear-gradient(100deg, #5AE6F2 0%, #68B8FF 60%, #7C93FF 100%);
  box-shadow: 0 14px 36px rgba(47,216,232,.30);
}

/* ---------- 8. 细线与分隔统一为同一冷暖，不再忽黑忽亮 ---------- */
.sol-row, .case-row, .timeline-item, .plat-row + .plat-row, .footer-bottom {
  border-color: rgba(140,190,235,.11);
}
.plat-shot { box-shadow: 0 30px 80px rgba(6,20,38,.45); }
.frame { box-shadow: 0 26px 64px rgba(6,20,38,.40); }