/* ============================================================
   圣合智联 · 数据基座引擎 — 官网样式
   设计方向：深邃数据空间 / 编辑级排版 / 克制而精准
   ============================================================ */

@font-face {
  font-family: "Noto Sans SC";
  src: url("../fonts/NotoSansSC-Subset.woff2") format("woff2");
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
}

@font-face {
  font-family: "Noto Serif SC";
  src: url("../fonts/NotoSerifSC-Subset.woff2") format("woff2");
  font-style: normal;
  font-weight: 200 900;
  font-display: swap;
}

@font-face {
  font-family: "JetBrains Mono";
  src: url("../fonts/JetBrainsMono-Subset.woff2") format("woff2");
  font-style: normal;
  font-weight: 100 800;
  font-display: swap;
}

:root {
  --bg: #060b14;
  --bg-2: #0a1220;
  --bg-3: #0d1626;
  --ink: #e9eff7;
  --muted: #93a2b8;
  --faint: #5c6b82;
  --line: rgba(148, 180, 220, 0.14);
  --accent: #45e3c4;
  --accent-2: #5b8cff;
  --accent-dim: rgba(69, 227, 196, 0.12);
  --serif: "Noto Serif SC", "Songti SC", serif;
  --sans: "Noto Sans SC", "PingFang SC", sans-serif;
  --mono: "JetBrains Mono", "SF Mono", monospace;
  --radius: 14px;
  --nav-h: 72px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: auto; }
html.lenis, html.lenis body { height: auto; }
.lenis.lenis-smooth { scroll-behavior: auto !important; }

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-weight: 300;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

::selection { background: var(--accent); color: #04241c; }

/* 背景细网格纹理 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(148, 180, 220, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 180, 220, 0.045) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, black 20%, transparent 75%);
  pointer-events: none;
  z-index: 0;
}

main { position: relative; z-index: 1; }

.container { max-width: 1240px; margin: 0 auto; padding: 0 40px; }

/* ---------- 滚动进度条 ---------- */
.scroll-progress {
  position: fixed; top: 0; left: 0; height: 2px; width: 0;
  background: linear-gradient(90deg, var(--accent-2), var(--accent));
  z-index: 100;
}

/* ---------- 导航 ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 90;
  transition: background 0.4s, border-color 0.4s, backdrop-filter 0.4s;
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  background: rgba(6, 11, 20, 0.78);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom-color: var(--line);
}
.nav-inner {
  max-width: 1240px; margin: 0 auto; padding: 0 40px;
  height: var(--nav-h);
  display: flex; align-items: center; justify-content: space-between;
}
.brand { text-decoration: none; display: flex; align-items: center; gap: 10px; }
.brand-logo { height: 28px; width: auto; display: block; }
.brand-mark {
  font-family: var(--serif); font-weight: 900; font-size: 22px;
  color: var(--ink); letter-spacing: 2px;
}
.brand-sub { font-family: var(--mono); font-size: 10px; letter-spacing: 2.5px; color: var(--faint); align-self: center; }
.footer-brand { display: block; }
.footer-brand-main { display: flex; align-items: center; gap: 16px; width: max-content; }
.footer-logo { display: block; height: 30px; width: auto; flex: 0 0 auto; }
.nav-links { display: flex; align-items: center; gap: 26px; }
.nav-links a {
  color: var(--muted); text-decoration: none; font-size: 14px; font-weight: 400;
  letter-spacing: 1px; transition: color 0.3s; position: relative;
}
.nav-links a:not(.nav-cta)::after {
  content: ""; position: absolute; left: 0; bottom: -6px; width: 0; height: 1px;
  background: var(--accent); transition: none;
}
.nav-links a:hover { color: var(--ink); }
.nav-links a:not(.nav-cta):hover::after { width: 100%; height: 2px; transition: width 0.3s; }
.nav-links a.active { color: var(--ink); }
.nav-links a.active:not(.nav-cta)::after { width: 100%; height: 2px; }
.nav-cta {
  border: 1px solid var(--line); border-radius: 99px; padding: 8px 20px;
  color: var(--ink) !important; transition: border-color 0.3s, background 0.3s !important;
}
.nav-cta:hover { border-color: var(--accent); background: var(--accent-dim); }
.nav-cta.active { border-color: var(--accent); background: var(--accent-dim); }
.nav-cta::after { display: none; }
.nav-toggle { display: none; }

/* ---------- 通用排版 ---------- */
.eyebrow {
  font-family: var(--mono); font-size: 12px; letter-spacing: 4px;
  color: var(--accent); text-transform: uppercase;
  display: flex; align-items: center; gap: 10px;
}
.eyebrow-dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent);
}
.sec-title {
  font-family: var(--serif); font-weight: 700;
  font-size: clamp(34px, 4.6vw, 58px);
  line-height: 1.25; letter-spacing: 1px; margin-top: 20px;
}
.sec-title em, .hero-title em, .footer-title em {
  font-style: normal;
  background: linear-gradient(120deg, var(--accent) 10%, var(--accent-2) 90%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.sec-lead { max-width: 760px; margin-top: 26px; color: var(--muted); font-size: 16px; }
.sec-head { margin-bottom: 70px; }
.block-title { font-family: var(--serif); font-weight: 700; font-size: clamp(24px, 2.6vw, 34px); letter-spacing: 1px; }
.block-sub { color: var(--faint); font-size: 14px; margin-top: 8px; letter-spacing: 1px; }

.btn {
  display: inline-flex; align-items: center; gap: 10px;
  text-decoration: none; font-size: 15px; font-weight: 500; letter-spacing: 2px;
  padding: 15px 34px; border-radius: 99px; transition: all 0.35s;
}
.btn-solid { background: var(--accent); color: #04241c; }
.btn-solid:hover { background: #6ff0d6; box-shadow: 0 8px 32px rgba(69, 227, 196, 0.35); transform: translateY(-2px); }
.btn-ghost { border: 1px solid var(--line); color: var(--ink); }
.btn-ghost:hover { border-color: var(--accent); background: var(--accent-dim); transform: translateY(-2px); }
.btn-arrow { font-family: var(--mono); transition: transform 0.3s; }
.btn-ghost:hover .btn-arrow { transform: translateX(4px); }
.btn-big { padding: 18px 46px; font-size: 16px; }

.section { padding: 150px 0; position: relative; }
.section-alt { background: linear-gradient(180deg, transparent, var(--bg-2) 18%, var(--bg-2) 82%, transparent); }

/* ---------- HERO ---------- */
.hero {
  min-height: 100vh; position: relative;
  display: flex; flex-direction: column; justify-content: center;
  padding: calc(var(--nav-h) + 60px) 0 0;
  overflow: hidden;
}
#heroCanvas { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero-glow {
  position: absolute; width: 900px; height: 900px; border-radius: 50%;
  background: radial-gradient(circle, rgba(91, 140, 255, 0.14), rgba(69, 227, 196, 0.06) 45%, transparent 70%);
  top: -320px; right: -220px; pointer-events: none;
}
.hero-visual {
  position: absolute; z-index: 0; top: 50%; right: max(-170px, calc((100vw - 1500px) / 2));
  width: min(69vw, 1040px); aspect-ratio: 3 / 2;
  transform: translateY(-52%); pointer-events: none; opacity: 0.72; mix-blend-mode: screen;
  -webkit-mask-image: linear-gradient(90deg, transparent 0%, rgba(0,0,0,0.08) 12%, black 42%, black 86%, transparent 100%);
  mask-image: linear-gradient(90deg, transparent 0%, rgba(0,0,0,0.08) 12%, black 42%, black 86%, transparent 100%);
}
.hero-visual::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, var(--bg) 0%, transparent 22%, transparent 70%, var(--bg) 100%);
}
.hero-visual img { width: 100%; height: 100%; object-fit: cover; display: block; }
.hero-inner { position: relative; z-index: 2; max-width: 1240px; margin: 0 auto; padding: 0 40px; width: 100%; }
.hero-eyebrow { margin-bottom: 34px; }
.hero-title {
  font-family: var(--serif); font-weight: 900;
  font-size: clamp(52px, 8.4vw, 116px);
  line-height: 1.14; letter-spacing: 4px;
}
.hero-title .line { display: block; overflow: hidden; }
.hero-title .line > span { display: inline-block; will-change: transform; }
.hero-lead {
  max-width: 640px; margin-top: 36px;
  color: var(--muted); font-size: 17px;
}
.hero-actions { display: flex; gap: 18px; margin-top: 48px; flex-wrap: wrap; }

.hero-stats {
  position: relative; margin-top: 90px;
  display: grid; grid-template-columns: repeat(4, 1fr);
  max-width: 1240px; width: 100%; margin-left: auto; margin-right: auto; padding: 0 40px;
}
.hstat { padding: 30px 34px 36px; border-left: 1px solid var(--line); border-top: 1px solid var(--line); }
.hstat:first-child { border-left: none; padding-left: 0; }
.hstat-num {
  font-family: var(--mono); font-weight: 700; font-size: clamp(26px, 2.6vw, 38px);
  color: var(--accent); display: block; letter-spacing: -0.5px;
}
.hstat-label { font-size: 13px; color: var(--faint); letter-spacing: 1px; display: block; margin-top: 6px; }

.hero-scrollhint {
  position: absolute; bottom: 26px; left: 50%; transform: translateX(-50%);
  font-family: var(--mono); font-size: 11px; letter-spacing: 3px; color: var(--faint);
  display: none;
}

/* ---------- 关于我们 ---------- */
.about-grid { display: grid; grid-template-columns: 1fr 1.15fr; gap: 80px; align-items: start; }
.about-lead p { color: var(--muted); margin-bottom: 22px; font-size: 16px; }
.about-lead strong { color: var(--ink); font-weight: 500; }
.about-extra {
  margin-top: 28px; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 24px 28px;
  background: linear-gradient(160deg, rgba(69, 227, 196, 0.06), transparent 55%);
}
.about-extra-label {
  font-family: var(--serif); font-weight: 700; font-size: 16.5px; letter-spacing: 1px;
  display: block; margin-bottom: 10px;
}
.about-extra > p { font-size: 13px; color: var(--accent); font-family: var(--mono); letter-spacing: 1px; margin-bottom: 18px; }
.about-tags { display: flex; flex-wrap: wrap; gap: 9px; }
.about-tags span {
  font-size: 12.5px; color: var(--muted); border: 1px solid var(--line);
  border-radius: 8px; padding: 7px 14px; letter-spacing: 1px;
  background: rgba(148, 180, 220, 0.05); transition: color 0.3s, border-color 0.3s;
}
.about-tags span:hover { color: var(--accent); border-color: rgba(69, 227, 196, 0.45); }
.about-cards { display: flex; flex-direction: column; gap: 20px; }
.acard {
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: 32px 36px; position: relative;
  background: linear-gradient(160deg, rgba(148, 180, 220, 0.05), transparent 60%);
  transition: border-color 0.35s, transform 0.35s;
}
.acard:hover { border-color: rgba(69, 227, 196, 0.45); transform: translateX(6px); }
.acard-index {
  position: absolute; top: 28px; right: 32px;
  font-family: var(--serif); font-size: 40px; font-weight: 900;
  color: rgba(148, 180, 220, 0.16); line-height: 1;
}
.acard h3 { font-family: var(--serif); font-size: 21px; font-weight: 700; margin-bottom: 12px; letter-spacing: 1px; }
.acard p { color: var(--muted); font-size: 14.5px; }

/* ---------- 核心技术 ---------- */
.tech-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.tcard {
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: 34px 32px 30px; position: relative; overflow: hidden;
  transition: border-color 0.35s, background 0.35s;
  background: rgba(10, 18, 32, 0.5);
}
.tcard::before {
  content: ""; position: absolute; top: 0; left: 0; width: 100%; height: 2px;
  background: linear-gradient(90deg, var(--accent), transparent);
  transform: scaleX(0); transform-origin: left; transition: transform 0.45s;
}
.tcard:hover { border-color: rgba(69, 227, 196, 0.4); }
.tcard:hover::before { transform: scaleX(1); }
.tcard-top { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin-bottom: 26px; }
.card-icon, .field-icon {
  display: block; flex: none; width: 32px; height: 32px; color: var(--accent);
  background: currentColor;
  -webkit-mask: var(--icon) center / contain no-repeat;
  mask: var(--icon) center / contain no-repeat;
  transition: color 0.3s, transform 0.35s;
}
.tcard:hover .card-icon, .edu-pain:hover .card-icon, .field-card:hover .field-icon {
  color: var(--accent-2); transform: translateY(-3px);
}
.tcard-no {
  font-family: var(--mono); font-size: 12px; color: var(--accent);
  letter-spacing: 2px; display: block;
}
.tcard h3 { font-family: var(--serif); font-size: 19px; font-weight: 700; margin-bottom: 12px; letter-spacing: 0.5px; }
.tcard p { color: var(--muted); font-size: 14px; }
/* 第7张卡片横跨 */
.tcard:nth-child(7) { grid-column: 1 / -1; display: flex; align-items: center; gap: 40px; }
.tcard:nth-child(7) h3 { margin-bottom: 0; white-space: nowrap; }
.tcard:nth-child(7) .tcard-top { margin-bottom: 0; min-width: 92px; }

/* 七大技术集群 */
.cluster {
  margin-top: 90px; border: 1px solid var(--line); border-radius: 20px;
  padding: 54px 56px; display: grid; grid-template-columns: 1fr 1.2fr; gap: 60px;
  background:
    radial-gradient(ellipse 60% 90% at 8% 10%, rgba(91, 140, 255, 0.1), transparent 60%),
    var(--bg-3);
}
.cluster-head h3 { font-family: var(--serif); font-size: 27px; font-weight: 700; letter-spacing: 1px; margin-bottom: 18px; }
.cluster-head p { color: var(--muted); font-size: 14.5px; }
.cluster-list { list-style: none; display: flex; flex-direction: column; }
.cluster-list li {
  padding: 13px 0; border-bottom: 1px solid var(--line);
  font-size: 15px; font-weight: 400; display: flex; align-items: center;
  gap: 15px; letter-spacing: 0.5px;
}
.cluster-list li:last-child { border-bottom: none; }
.cluster-icon {
  display: block; flex: 0 0 22px; width: 22px; height: 22px; color: var(--accent);
  background: currentColor;
  -webkit-mask: var(--icon) center / contain no-repeat;
  mask: var(--icon) center / contain no-repeat;
  transition: color 0.3s, transform 0.3s;
}
.cluster-list li:hover .cluster-icon { color: var(--accent-2); transform: translateY(-2px); }

/* 架构图 */
.arch { margin-top: 90px; }
.arch-title { font-family: var(--serif); font-size: 24px; font-weight: 700; text-align: center; letter-spacing: 1px; margin-bottom: 50px; }
.arch-layers { max-width: 900px; margin: 0 auto; }
.arch-layer {
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: 24px 28px; display: flex; align-items: center; gap: 26px;
  background: rgba(10, 18, 32, 0.6);
}
.arch-layer-name {
  font-family: var(--serif); font-weight: 700; font-size: 17px; letter-spacing: 2px;
  writing-mode: horizontal-tb; white-space: nowrap; color: var(--accent);
  border-right: 1px solid var(--line); padding-right: 26px; min-width: 96px;
}
.arch-boxes { display: flex; flex-wrap: wrap; gap: 10px; }
.arch-box {
  font-size: 13.5px; color: var(--muted); border: 1px solid var(--line);
  border-radius: 8px; padding: 7px 16px; letter-spacing: 1px;
  background: rgba(148, 180, 220, 0.05);
}
.arch-layer-core { border-color: rgba(69, 227, 196, 0.5); background: linear-gradient(120deg, rgba(69, 227, 196, 0.09), rgba(91, 140, 255, 0.09)); }
.arch-core { font-family: var(--serif); font-size: 19px; font-weight: 700; letter-spacing: 1px; }
.arch-core span { display: block; font-family: var(--mono); font-size: 11.5px; color: var(--accent); font-weight: 400; letter-spacing: 2px; margin-top: 6px; }
.arch-flow { display: flex; align-items: center; justify-content: center; gap: 16px; padding: 14px 0; }
.arch-flow i { flex: 0 0 1px; width: 1px; height: 22px; background: linear-gradient(180deg, var(--accent), transparent); }
.arch-flow em { font-style: normal; font-family: var(--mono); font-size: 11.5px; letter-spacing: 2px; color: var(--faint); }

/* ---------- 基座引擎 ---------- */
.engine-intro {
  display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 48px;
  padding: 34px 38px; margin-bottom: 100px;
  border: 1px solid var(--line); border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(91, 140, 255, 0.055), rgba(69, 227, 196, 0.025));
}
.engine-intro p { font-size: 15.5px; line-height: 2; color: var(--muted); }
.engine-intro p + p { margin-top: 0; }
.engine-intro strong { color: var(--ink); font-weight: 500; }

/* 产品核心架构 */
.prod-arch { margin-bottom: 110px; }
.prod-arch > .tech-grid { margin-top: 40px; }
.prod-layers { margin-top: 44px; }
.prod-layers-title { font-family: var(--serif); font-size: 18px; font-weight: 700; letter-spacing: 1px; }
.prod-layers-sub { color: var(--faint); font-size: 13px; letter-spacing: 1px; margin: 8px 0 20px; }

.vs { margin-bottom: 110px; }
.vs-table { margin-top: 40px; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.vs-row {
  display: grid; grid-template-columns: 1fr 1.3fr;
  border-bottom: 1px solid var(--line);
}
.vs-row:last-child { border-bottom: none; }
.vs-row > span { padding: 19px 28px; font-size: 14.5px; display: flex; align-items: center; }
.vs-row-head { background: rgba(148, 180, 220, 0.06); }
.vs-row-head span { font-family: var(--mono); font-size: 12px; letter-spacing: 3px; color: var(--faint); padding: 14px 28px; }
.vs-old { color: var(--faint); text-decoration: line-through; text-decoration-color: rgba(148, 180, 220, 0.35); text-decoration-thickness: 1px; }
.vs-new { border-left: 1px solid var(--line); color: var(--ink); background: linear-gradient(90deg, rgba(69, 227, 196, 0.05), transparent); }
.vs-new b {
  font-weight: 700; color: var(--accent); margin-right: 14px;
  font-family: var(--serif); font-size: 15.5px; letter-spacing: 1px;
}
.vs-tags { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 26px; }
.vs-tags span {
  font-family: var(--mono); font-size: 12px; letter-spacing: 1.5px;
  border: 1px solid rgba(69, 227, 196, 0.35); color: var(--accent);
  padding: 8px 18px; border-radius: 99px; background: var(--accent-dim);
}

/* 主索引轨道图 */
.empi { display: grid; grid-template-columns: 1.1fr 1fr; gap: 70px; align-items: center; margin-bottom: 110px; }
.empi-text p { color: var(--muted); margin-top: 22px; font-size: 15.5px; }
.empi-text strong { color: var(--ink); font-weight: 500; }
.empi-merits { list-style: none; margin-top: 28px; display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.empi-merits li {
  font-size: 13.5px; color: var(--muted); border: 1px solid var(--line);
  border-radius: 10px; padding: 13px 18px;
}
.empi-orbits {
  position: relative; aspect-ratio: 1; max-width: 460px; margin: 0 auto; width: 100%;
  border: 1px solid var(--line); border-radius: 50%;
}
.empi-orbits::before {
  content: ""; position: absolute; inset: 18%;
  border: 1px dashed rgba(148, 180, 220, 0.2); border-radius: 50%;
}
.orbit-core {
  position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
  width: 132px; height: 132px; border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, rgba(69, 227, 196, 0.25), rgba(91, 140, 255, 0.12));
  border: 1px solid rgba(69, 227, 196, 0.6);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  font-family: var(--mono); font-weight: 700; font-size: 20px; color: var(--accent);
  box-shadow: 0 0 60px rgba(69, 227, 196, 0.18);
  z-index: 2;
}
.orbit-core span { font-size: 11px; font-weight: 400; color: var(--muted); letter-spacing: 2px; margin-top: 4px; font-family: var(--sans); }
.orbit { position: absolute; }
.orbit i {
  font-style: normal; font-size: 12.5px; letter-spacing: 1px; white-space: nowrap;
  border: 1px solid var(--line); background: var(--bg-3);
  padding: 7px 15px; border-radius: 99px; color: var(--ink);
  display: block; box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
}
.orbit-1 { top: -4%; left: 50%; transform: translateX(-50%); }
.orbit-2 { top: 20%; right: -6%; }
.orbit-3 { bottom: 20%; right: -6%; }
.orbit-4 { bottom: -4%; left: 50%; transform: translateX(-50%); }
.orbit-5 { bottom: 20%; left: -6%; }
.orbit-6 { top: 20%; left: -6%; }

/* 区块链步骤 */
.chain { margin-bottom: 110px; }
.chain-steps { display: flex; align-items: stretch; gap: 14px; margin-top: 42px; }
.chain-step {
  flex: 1; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px 24px; font-family: var(--serif); font-weight: 700; font-size: 16.5px;
  letter-spacing: 1px; background: rgba(10, 18, 32, 0.6); position: relative;
}
.chain-step span {
  display: block; font-family: var(--mono); font-size: 11px; color: var(--accent);
  letter-spacing: 3px; margin-bottom: 12px; font-weight: 400;
}
.chain-step em { display: block; font-style: normal; font-family: var(--sans); font-weight: 300; font-size: 12.5px; color: var(--faint); margin-top: 10px; letter-spacing: 1px; }
.chain-arrow { display: flex; align-items: center; color: var(--accent); font-size: 20px; }
.chain-merits { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 26px; }
.chain-merits > div {
  border-top: 1px solid var(--line); padding-top: 20px;
  font-size: 13.5px; color: var(--muted);
}
.chain-merits b { display: block; color: var(--ink); font-weight: 500; font-size: 15px; margin-bottom: 8px; letter-spacing: 1px; }

/* 应用生态 */
.eco-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-top: 44px; }
.eco-item {
  border: 1px solid var(--line); border-radius: 12px; padding: 24px 22px;
  font-size: 13.5px; color: var(--muted); background: rgba(10, 18, 32, 0.5);
  transition: border-color 0.3s, color 0.3s;
}
.eco-item:hover { border-color: rgba(69, 227, 196, 0.4); color: var(--ink); }
.eco-item span { display: block; font-family: var(--mono); font-size: 11px; color: var(--accent); letter-spacing: 2px; margin-bottom: 12px; }

/* ---------- 成果案例 ---------- */
.cases { position: relative; background: var(--bg-2); }
.cases-pin {
  height: 100vh; overflow: hidden;
  display: flex; flex-direction: column; justify-content: center;
}
.cases-head { padding-top: calc(var(--nav-h) + 20px); width: 100%; margin-bottom: 34px; position: relative; }
.cases-head .sec-title { font-size: clamp(30px, 3.6vw, 46px); }
.cases-progress {
  position: absolute; right: 40px; bottom: 8px;
  width: 180px; height: 2px; background: var(--line); border-radius: 2px;
}
.cases-progress span { display: block; height: 100%; width: 0; background: var(--accent); border-radius: 2px; }
.cases-track { display: flex; will-change: transform; }
.case-panel {
  flex: 0 0 100vw; height: calc(100vh - 260px); min-height: 480px;
  padding: 10px max(60px, calc((100vw - 1240px) / 2 + 40px));
  overflow-y: auto;
  scrollbar-width: none;
}
.case-panel::-webkit-scrollbar { display: none; }
.case-lead {
  display: block;
}
.case-heading { min-width: 0; }
.case-tag {
  display: inline-block; font-family: var(--mono); font-size: 12px; letter-spacing: 3px;
  color: var(--accent); border: 1px solid rgba(69, 227, 196, 0.4);
  padding: 7px 18px; border-radius: 99px; margin-bottom: 22px; background: var(--accent-dim);
}
.case-title {
  font-family: var(--serif); font-weight: 900; font-size: clamp(30px, 3.6vw, 50px);
  letter-spacing: 2px; line-height: 1.3;
}
.case-title span { display: block; font-size: 0.5em; font-weight: 700; color: var(--muted); letter-spacing: 3px; margin-top: 8px; }
.case-stats {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 0;
  border-top: 1px solid var(--line); border-bottom: 1px solid var(--line);
  margin: 30px 0 36px;
}
.cstat { padding: 20px 26px; border-left: 1px solid var(--line); }
.cstat:first-child { border-left: none; padding-left: 0; }
.cstat b { font-family: var(--mono); font-size: clamp(24px, 2.4vw, 34px); font-weight: 700; color: var(--accent); display: block; }
.cstat span { font-size: 12.5px; color: var(--faint); letter-spacing: 1px; }
.case-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; }
.case-cols h4 {
  font-family: var(--serif); font-size: 17px; font-weight: 700; letter-spacing: 1px;
  color: var(--ink); margin: 22px 0 10px; display: flex; align-items: center; gap: 10px;
}
.case-cols h4::before { content: ""; width: 14px; height: 1.5px; background: var(--accent); flex: none; }
.case-cols h4:first-child { margin-top: 0; }
.case-cols p { font-size: 14px; color: var(--muted); }

.case-story { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; margin-top: 40px; }
.story-item {
  border: 1px solid var(--line); border-radius: var(--radius); padding: 38px 36px;
  background: rgba(6, 11, 20, 0.5);
}
.story-year { font-family: var(--mono); font-size: 13px; color: var(--accent); letter-spacing: 3px; }
.story-item h4 { font-family: var(--serif); font-size: 20px; font-weight: 700; margin: 14px 0 14px; letter-spacing: 1px; }
.story-item p { font-size: 14px; color: var(--muted); }
.story-tags { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 22px; }
.story-tags > div { border-top: 1px solid var(--line); padding-top: 14px; font-size: 13px; color: var(--muted); }
.story-tags b { display: block; color: var(--ink); font-weight: 500; margin-bottom: 6px; font-size: 13.5px; }
.case-quote {
  margin-top: 44px; font-family: var(--serif); font-size: 19px; font-weight: 700;
  color: var(--muted); letter-spacing: 1px; border-left: 2px solid var(--accent); padding-left: 24px;
}

/* ---------- 行业应用 ---------- */
.fields-group-head { margin-bottom: 0; }
.fields-group-head .eyebrow { line-height: 1; }
.fields-group-head .block-title { margin-top: 10px; line-height: 1.3; }
.fields-group-sub { margin-top: 100px; }
.fields-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.fields-group-head + .fields-grid { margin-top: 24px; }
.field-card {
  border: 1px solid var(--line); border-radius: var(--radius); padding: 44px 38px;
  background: rgba(10, 18, 32, 0.5); position: relative; overflow: hidden;
  transition: transform 0.35s, border-color 0.35s;
}
.field-card:hover { transform: translateY(-6px); border-color: rgba(69, 227, 196, 0.4); }
.field-no {
  font-family: var(--serif); font-size: 72px; font-weight: 900; line-height: 1;
  color: rgba(148, 180, 220, 0.075); position: absolute; top: 22px; right: 30px;
}
.field-icon { margin-bottom: 26px; }
.field-card h3 { font-family: var(--serif); font-size: 22px; font-weight: 700; letter-spacing: 2px; margin-bottom: 24px; }
.field-card ul { list-style: none; }
.field-card li {
  font-size: 14px; color: var(--muted); padding: 11px 0;
  border-bottom: 1px solid var(--line); position: relative;
  display: flex; align-items: center; gap: 11px;
}
.field-card li:last-child { border-bottom: none; }
.field-item-icon, .market-icon {
  display: inline-block; flex: 0 0 auto; color: var(--accent);
  background: currentColor;
  -webkit-mask: var(--icon) center / contain no-repeat;
  mask: var(--icon) center / contain no-repeat;
  transition: color 0.3s, transform 0.3s;
}
.field-item-icon { width: 18px; height: 18px; opacity: 0.88; }
.field-card li:hover .field-item-icon { color: var(--accent-2); transform: translateY(-2px); opacity: 1; }
.fields-more {
  display: flex; align-items: center; justify-content: space-between; gap: 40px;
  margin-top: 100px; padding: 36px 44px; flex-wrap: wrap;
  border: 1px solid var(--line); border-radius: 18px;
  background:
    radial-gradient(ellipse 50% 120% at 0% 50%, rgba(69, 227, 196, 0.08), transparent 65%),
    radial-gradient(ellipse 50% 120% at 100% 50%, rgba(91, 140, 255, 0.08), transparent 65%),
    rgba(10, 18, 32, 0.6);
}
.fields-more-label { display: flex; flex-direction: column; gap: 6px; flex: none; }
.fields-more-label b {
  font-family: var(--serif); font-size: 24px; font-weight: 900; letter-spacing: 4px;
}
.fields-more-label span {
  font-family: var(--mono); font-size: 11px; letter-spacing: 3px; color: var(--accent);
}
.fields-tags { display: flex; flex-wrap: wrap; align-items: center; }
.fields-tags span {
  font-family: var(--serif); font-size: 19px; font-weight: 700; letter-spacing: 3px;
  color: var(--muted); padding: 6px 4px; position: relative;
  display: inline-flex; align-items: center; gap: 9px;
  transition: color 0.3s, transform 0.3s; cursor: default;
}
.fields-tags span:not(:last-child) { margin-right: 34px; }
.fields-tags span:not(:last-child)::after {
  content: ""; position: absolute; right: -18px; top: 50%;
  width: 1px; height: 16px; transform: translateY(-50%);
  background: linear-gradient(transparent, rgba(112, 153, 190, 0.5), transparent);
}
.market-icon { width: 20px; height: 20px; opacity: 0.78; }
.fields-tags span:hover { color: var(--accent); transform: translateY(-3px); }
.fields-tags span:hover .market-icon { color: var(--accent-2); transform: translateY(-1px); opacity: 1; }

/* ---------- 行业数据基座 ---------- */
.industry-foundations {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px;
  margin: -12px 0 0;
}
.industry-foundation {
  min-height: 290px; padding: 38px 34px;
  border: 1px solid var(--line); border-radius: var(--radius);
  background: rgba(10, 18, 32, 0.52);
  color: var(--ink); text-decoration: none;
  display: flex; flex-direction: column;
  transition: transform 0.35s, border-color 0.35s, background 0.35s;
}
.industry-foundation:hover {
  transform: translateY(-6px); border-color: rgba(69, 227, 196, 0.5);
  background: rgba(69, 227, 196, 0.06);
}
.industry-foundation-primary {
  background:
    radial-gradient(circle at 100% 0%, rgba(91, 140, 255, 0.12), transparent 50%),
    rgba(10, 18, 32, 0.68);
  border-color: rgba(69, 227, 196, 0.3);
}
.industry-foundation-no {
  font-family: var(--mono); font-size: 11px; letter-spacing: 2.5px;
  color: var(--accent); margin-bottom: 34px;
}
.industry-foundation h3 {
  font-family: var(--serif); font-size: 25px; font-weight: 900;
  letter-spacing: 2px; margin-bottom: 16px;
}
.industry-foundation p { color: var(--muted); font-size: 14px; }
.industry-foundation-link {
  margin-top: auto; padding-top: 30px; color: var(--accent);
  font-size: 12px; letter-spacing: 1.5px;
}
.industry-detail {
  scroll-margin-top: calc(var(--nav-h) + 28px);
  border-top: 1px solid var(--line);
  padding: 105px 0;
}
.industry-foundations + .industry-detail { border-top: none; }
.industry-detail:last-child { padding-bottom: 0; }
.industry-detail-head { margin-bottom: 44px; }
.industry-detail-head .block-title { margin-top: 18px; }
.industry-detail-head .sec-lead { margin-top: 16px; }
.industry-capabilities {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px;
}
.industry-capability {
  min-height: 230px; padding: 32px 30px;
  border: 1px solid var(--line); border-radius: 12px;
  background:
    linear-gradient(145deg, rgba(69, 227, 196, 0.035), transparent 58%),
    rgba(10, 18, 32, 0.48);
  transition: transform 0.35s, border-color 0.35s, background 0.35s;
}
.industry-capability:hover {
  transform: translateY(-4px);
  border-color: rgba(69, 227, 196, 0.4);
  background:
    linear-gradient(145deg, rgba(69, 227, 196, 0.075), transparent 62%),
    rgba(10, 18, 32, 0.62);
}
.industry-capability > span {
  display: block; margin-bottom: 34px;
  color: var(--accent); font-family: var(--mono);
  font-size: 10.5px; letter-spacing: 2.5px;
}
.industry-capability h4 {
  margin-bottom: 14px; color: var(--ink);
  font-family: var(--serif); font-size: 18px;
  font-weight: 700; letter-spacing: 1px;
}
.industry-capability p { color: var(--muted); font-size: 13.5px; }

/* 高校数据基座详情 */
.edu-pains { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-bottom: 90px; }
.edu-pain {
  border: 1px solid var(--line); border-radius: 12px; padding: 24px 26px;
  font-size: 13.5px; color: var(--muted); background: rgba(10, 18, 32, 0.5);
  transition: border-color 0.3s, transform 0.3s;
}
.edu-pain:hover { border-color: rgba(69, 227, 196, 0.32); transform: translateY(-3px); }
.edu-pain .card-icon { width: 28px; height: 28px; margin-bottom: 20px; }
.edu-pain b {
  display: block; font-family: var(--serif); font-size: 16.5px; color: var(--ink);
  font-weight: 700; letter-spacing: 2px; margin-bottom: 8px;
}
.edu-arch { margin-bottom: 90px; }
.edu-grid { margin-top: 40px; }
.edu-five { margin-bottom: 90px; }
.edu-five-list { margin-top: 40px; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.edu-five-item {
  display: flex; gap: 30px; align-items: flex-start;
  padding: 26px 34px; border-bottom: 1px solid var(--line);
  background: rgba(10, 18, 32, 0.4); transition: background 0.3s;
}
.edu-five-item:last-child { border-bottom: none; }
.edu-five-item:hover { background: rgba(69, 227, 196, 0.05); }
.edu-five-item > span {
  font-family: var(--mono); font-size: 13px; color: var(--accent); letter-spacing: 2px;
  padding-top: 4px; flex: none;
}
.edu-five-item b {
  display: block; font-family: var(--serif); font-size: 17px; font-weight: 700;
  letter-spacing: 1px; margin-bottom: 6px;
}
.edu-five-item div { font-size: 14px; color: var(--muted); }
.edu-steps { flex-wrap: wrap; }
.edu-steps .chain-step { flex: 1 1 150px; }
.edu-note {
  margin-top: 30px; font-family: var(--serif); font-size: 17px; font-weight: 700;
  color: var(--muted); letter-spacing: 1px; border-left: 2px solid var(--accent); padding-left: 22px;
}

/* ---------- 合作伙伴 ---------- */
.partners { padding-bottom: 110px; }
.marquee {
  overflow: hidden; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line);
  padding: 34px 0; position: relative;
  mask-image: linear-gradient(90deg, transparent, black 8%, black 92%, transparent);
  -webkit-mask-image: linear-gradient(90deg, transparent, black 8%, black 92%, transparent);
}
.marquee-track { display: flex; gap: 70px; width: max-content; animation: marquee 36s linear infinite; }
.marquee:hover .marquee-track { animation-play-state: paused; }
.marquee-track span {
  font-family: var(--serif); font-size: 21px; font-weight: 700; letter-spacing: 3px;
  color: var(--faint); white-space: nowrap; transition: color 0.3s;
}
.marquee-track span:hover { color: var(--accent); }
@keyframes marquee { from { transform: translateX(0); } to { transform: translateX(-50%); } }

/* ---------- 页脚 ---------- */
.footer { border-top: 1px solid var(--line); padding: 130px 0 0; background: linear-gradient(180deg, transparent, var(--bg-2)); }
.footer-cta { text-align: center; margin-bottom: 110px; }
.footer-cta .eyebrow { justify-content: center; }
.footer-title { font-family: var(--serif); font-weight: 900; font-size: clamp(40px, 5.6vw, 72px); line-height: 1.3; letter-spacing: 3px; margin-top: 24px; }
.footer-sub { color: var(--muted); margin: 28px 0 44px; font-size: 15.5px; }
.footer-contacts { display: flex; justify-content: center; gap: 22px; flex-wrap: wrap; }
.fcontact {
  border: 1px solid var(--line); border-radius: 16px; padding: 28px 44px;
  background: rgba(10, 18, 32, 0.6); text-align: center; min-width: 260px;
  transition: border-color 0.3s, transform 0.3s;
}
.fcontact:hover { border-color: rgba(69, 227, 196, 0.45); transform: translateY(-4px); }
.fcontact-city {
  display: block; font-family: var(--mono); font-size: 11.5px; letter-spacing: 3px;
  color: var(--accent); margin-bottom: 14px;
}
.fcontact b {
  display: block; font-family: var(--serif); font-size: 21px; font-weight: 700;
  letter-spacing: 3px; margin-bottom: 10px;
}
.fcontact a {
  font-family: var(--mono); font-size: 20px; font-weight: 700; letter-spacing: 1px;
  color: var(--ink); text-decoration: none; transition: color 0.3s;
}
.fcontact a:hover { color: var(--accent); }
.footer-bottom {
  border-top: 1px solid var(--line); padding: 40px 0 34px;
  display: flex; align-items: center; justify-content: space-between; gap: 30px; flex-wrap: wrap;
}
.footer-brand p { color: var(--muted); font-size: 12.5px; margin-top: 10px; line-height: 1.8; }
.footer-nav { display: flex; gap: 26px; }
.footer-nav a { color: var(--muted); text-decoration: none; font-size: 13.5px; letter-spacing: 1px; transition: color 0.3s; }
.footer-nav a:hover { color: var(--accent); }
.footer-legal { width: 100%; margin-top: 20px; text-align: center; }
.footer-copy { color: var(--muted); font-size: 12px; letter-spacing: 1px; font-family: var(--mono); }
.footer-icp {
  display: inline-block; margin-top: 8px; color: var(--muted); font-family: var(--mono);
  font-size: 12px; letter-spacing: 1px; text-decoration: none; transition: color 0.3s;
}
.footer-icp:hover { color: var(--accent); }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .hero-visual { right: -260px; width: 920px; opacity: 0.55; }
  .tech-grid { grid-template-columns: repeat(2, 1fr); }
  .edu-pains { grid-template-columns: repeat(2, 1fr); }
  .eco-grid { grid-template-columns: repeat(2, 1fr); }
  .cluster { grid-template-columns: 1fr; gap: 36px; padding: 40px; }
  .empi { grid-template-columns: 1fr; gap: 60px; }
  .about-grid { grid-template-columns: 1fr; gap: 50px; }
  .industry-foundations, .industry-capabilities { grid-template-columns: 1fr; }
  .case-cols, .case-story { grid-template-columns: 1fr; gap: 30px; }
}

@media (max-width: 768px) {
  .container { padding: 0 24px; }
  .nav-inner { padding: 0 24px; }
  .nav-links {
    position: fixed; inset: var(--nav-h) 0 auto 0;
    background: rgba(6, 11, 20, 0.97); backdrop-filter: blur(20px);
    flex-direction: column; align-items: flex-start; gap: 0;
    padding: 20px 24px 30px; border-bottom: 1px solid var(--line);
    transform: translateY(-12px); opacity: 0; pointer-events: none;
    transition: opacity 0.3s, transform 0.3s;
  }
  .nav-links.open { transform: none; opacity: 1; pointer-events: auto; }
  .nav-links a { padding: 14px 0; font-size: 16px; width: 100%; }
  .nav-cta { margin-top: 10px; }
  .nav-toggle {
    display: flex; flex-direction: column; gap: 6px; background: none; border: none;
    cursor: pointer; padding: 8px;
  }
  .nav-toggle span { width: 24px; height: 1.5px; background: var(--ink); transition: transform 0.3s, opacity 0.3s; }
  .nav-toggle.open span:first-child { transform: translateY(3.75px) rotate(45deg); }
  .nav-toggle.open span:last-child { transform: translateY(-3.75px) rotate(-45deg); }

  .section { padding: 100px 0; }
  .hero-visual {
    top: 42%; right: -58%; width: 155vw; opacity: 0.3; transform: translateY(-50%);
    -webkit-mask-image: linear-gradient(90deg, transparent 0%, black 35%, black 78%, transparent 100%);
    mask-image: linear-gradient(90deg, transparent 0%, black 35%, black 78%, transparent 100%);
  }
  .hero-inner { padding: 0 24px; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); padding: 0 24px; }
  .hstat:nth-child(3) { border-left: none; padding-left: 0; }
  .hstat { padding: 22px 20px 26px; }
  .tech-grid, .eco-grid, .fields-grid, .chain-merits, .edu-pains { grid-template-columns: 1fr; }
  .industry-detail { padding: 82px 0; }
  .tcard:nth-child(7) { flex-direction: column; align-items: flex-start; gap: 14px; }
  .tcard:nth-child(7) h3 { white-space: normal; }
  .card-icon, .field-icon { width: 28px; height: 28px; }
  .fields-group-head + .fields-grid { margin-top: 18px; }
  .engine-intro { grid-template-columns: 1fr; gap: 22px; padding: 26px 24px; }
  .chain-steps { flex-direction: column; }
  .chain-arrow { transform: rotate(90deg); justify-content: center; }
  .vs-row { grid-template-columns: 1fr; }
  .vs-new { border-left: none; border-top: 1px dashed var(--line); }
  .empi-merits { grid-template-columns: 1fr; }
  .case-panel { padding: 10px 24px; height: calc(100vh - 240px); }
  .case-stats { grid-template-columns: repeat(2, 1fr); }
  .cstat:nth-child(3) { border-left: none; padding-left: 0; }
  .cases-progress { display: none; }
  .empi-orbits { max-width: 320px; }
  .orbit-2, .orbit-3 { right: -10%; }
  .orbit-5, .orbit-6 { left: -10%; }
}

/* 动效偏好：减少动画 */
@media (prefers-reduced-motion: reduce) {
  .marquee-track { animation: none; }
  * { transition-duration: 0.01ms !important; }
}