/* ==========================================================================
   珠海昕雨科技有限公司 — 官网原型 公共样式层
   主题变量由 theme-a / theme-b / theme-c 覆盖
   ========================================================================== */

*, *::before, *::after { box-sizing: border-box; }

:root {
  /* 默认（深色靛蓝）主题令牌 */
  --bg: #070b16;
  --bg-soft: #0b1120;
  --bg-alt: #111827;
  --surface: rgba(255, 255, 255, 0.04);
  --surface-2: rgba(255, 255, 255, 0.07);
  --border: rgba(255, 255, 255, 0.10);
  --border-strong: rgba(255, 255, 255, 0.18);
  --text: #e9eef9;
  --text-dim: #aab6d0;
  --text-mute: #7c89a6;
  --primary: #4f6bed;
  --primary-2: #6d86f5;
  --primary-deep: #2f47c9;
  --accent: #22d3ee;
  --accent-soft: rgba(34, 211, 238, 0.16);
  --glow: 0 0 0 1px rgba(79, 107, 237, .45), 0 10px 40px -8px rgba(79, 107, 237, .65);
  --glow-accent: 0 0 30px -4px rgba(34, 211, 238, .55);
  --shadow-card: 0 18px 45px -25px rgba(0, 0, 0, .85);
  --shadow-lift: 0 30px 60px -30px rgba(0, 0, 0, .9);
  --radius: 16px;
  --radius-sm: 12px;
  --radius-lg: 24px;
  --nav-h: 72px;
  --maxw: 1240px;
  --font: "PingFang SC", "Microsoft YaHei UI", "Microsoft YaHei", "HarmonyOS Sans SC",
          "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
  --mono: "JetBrains Mono", "Cascadia Mono", Consolas, "SFMono-Regular", monospace;
  --ease: cubic-bezier(.22, .68, .28, 1);
  --icon-ink: rgba(146, 172, 235, .58);
}

/* SVG 图标统一线宽（图标精灵未声明 stroke-width，靠继承控制缩放后的粗细） */
svg.ico, .card-icon svg, .btn svg, .tl-icon svg, .check-list .ico svg, .panel-row .chip svg, .footer svg { stroke-width: 1.6; }
.case-media svg.art { stroke-width: 2; color: var(--icon-ink); }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

.wrap { width: min(100% - 48px, var(--maxw)); margin-inline: auto; }

/* ---------- 全局背景装饰 ---------- */
.bg-layer { position: fixed; inset: 0; z-index: 0; pointer-events: none; overflow: hidden; }
.bg-glow {
  position: absolute; width: 62vw; height: 62vw; border-radius: 50%;
  filter: blur(90px); opacity: .5;
}
.bg-glow.g1 { background: radial-gradient(circle, rgba(79,107,237,.55), transparent 62%); top: -22vw; right: -14vw; }
.bg-glow.g2 { background: radial-gradient(circle, rgba(34,211,238,.30), transparent 62%); top: 42vh; left: -26vw; }
.bg-grid {
  position: absolute; inset: -2px;
  background-image:
    linear-gradient(to right, rgba(255,255,255,.045) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,.045) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 90% 60% at 50% 0%, #000 20%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse 90% 60% at 50% 0%, #000 20%, transparent 78%);
}
.bg-circuit {
  position: absolute; inset: 0; opacity: .5;
  background-repeat: no-repeat; background-size: cover; background-position: center top;
}
.page { position: relative; z-index: 1; }

/* ---------- 导航 ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  height: var(--nav-h);
  display: flex; align-items: center;
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background .4s var(--ease), border-color .4s var(--ease), backdrop-filter .4s var(--ease);
}
.nav.is-scrolled {
  background: var(--nav-solid);
  border-bottom-color: var(--border);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
}
.nav-inner { display: flex; align-items: center; gap: 28px; width: min(100% - 48px, var(--maxw)); margin-inline: auto; }

.brand { display: flex; align-items: center; gap: 12px; margin-right: auto; }
.brand-mark {
  width: 38px; height: 38px; flex: 0 0 38px; border-radius: 11px;
  display: grid; place-items: center;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  box-shadow: 0 6px 20px -6px rgba(79,107,237,.9);
  color: #fff; font-weight: 800; font-size: 17px; letter-spacing: -.5px;
}
.brand-text { display: flex; flex-direction: column; line-height: 1.2; }
.brand-name { font-weight: 700; font-size: 16.5px; letter-spacing: .3px; }
.brand-sub { font-size: 11px; color: var(--text-mute); letter-spacing: 1.6px; text-transform: uppercase; }

.nav-links { display: flex; align-items: center; gap: 6px; }
.nav-link {
  position: relative; padding: 9px 14px; border-radius: 9px;
  font-size: 15px; color: var(--text-dim); transition: color .25s var(--ease);
}
.nav-link::after {
  content: ""; position: absolute; left: 14px; right: 14px; bottom: 3px; height: 2px;
  border-radius: 2px; background: linear-gradient(90deg, var(--primary), var(--accent));
  transform: scaleX(0); transform-origin: center; transition: transform .35s var(--ease);
}
.nav-link:hover, .nav-link.active { color: var(--text); }
.nav-link:hover::after, .nav-link.active::after { transform: scaleX(1); }

.nav-actions { display: flex; align-items: center; gap: 12px; }
.lang-toggle {
  display: flex; align-items: center; gap: 2px; padding: 3px;
  border: 1px solid var(--border); border-radius: 999px; background: var(--surface);
}
.lang-toggle button {
  border: 0; background: transparent; padding: 5px 11px; border-radius: 999px;
  font-size: 12.5px; font-weight: 600; color: var(--text-mute); letter-spacing: .6px;
  transition: all .25s var(--ease);
}
.lang-toggle button.on { background: var(--primary); color: #fff; box-shadow: 0 4px 14px -4px rgba(79,107,237,.9); }

.burger { display: none; width: 40px; height: 40px; border: 1px solid var(--border); background: var(--surface); border-radius: 10px; }
.burger span { display: block; width: 16px; height: 1.6px; background: var(--text); margin: 4px auto; border-radius: 2px; transition: .3s var(--ease); }

/* ---------- 按钮 ---------- */
.btn {
  position: relative; display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  padding: 13px 26px; border-radius: 12px; border: 1px solid transparent;
  font-size: 15px; font-weight: 600; letter-spacing: .2px; white-space: nowrap;
  transition: transform .3s var(--ease), box-shadow .35s var(--ease), background .35s var(--ease), color .3s var(--ease), border-color .3s var(--ease);
}
.btn svg { width: 17px; height: 17px; }
.btn-primary {
  background: linear-gradient(120deg, var(--primary), var(--primary-deep));
  color: #fff; box-shadow: 0 12px 28px -14px rgba(79,107,237,.95);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: var(--glow), 0 18px 34px -16px rgba(79,107,237,1); }
.btn-ghost { border-color: var(--border-strong); color: var(--text); background: var(--surface); }
.btn-ghost:hover { transform: translateY(-2px); border-color: var(--primary); color: #fff; box-shadow: 0 0 0 1px rgba(79,107,237,.4), 0 14px 34px -18px rgba(79,107,237,1); }
.btn-accent { background: linear-gradient(120deg, var(--accent), #0ea5b7); color: #04222a; box-shadow: var(--glow-accent); }
.btn-accent:hover { transform: translateY(-2px); }
.btn-sm { padding: 10px 18px; font-size: 14px; border-radius: 10px; }

/* ---------- 首屏 ---------- */
.hero { position: relative; padding: calc(var(--nav-h) + 84px) 0 96px; overflow: hidden; }
.hero-inner { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr); gap: 56px; align-items: center; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 7px 15px 7px 10px; border-radius: 999px;
  border: 1px solid var(--border); background: var(--surface);
  font-size: 13px; color: var(--text-dim); letter-spacing: .6px;
}
.eyebrow .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 4px var(--accent-soft); animation: pulse 2.4s var(--ease) infinite; }
@keyframes pulse { 0%,100% { opacity: 1; transform: scale(1); } 50% { opacity: .45; transform: scale(.82); } }

.hero h1 {
  margin: 24px 0 0; font-size: clamp(38px, 5vw, 66px); line-height: 1.1; letter-spacing: -1.2px; font-weight: 800;
}
.hero h1 .grad {
  background: linear-gradient(100deg, var(--primary-2) 0%, var(--accent) 55%, var(--primary-2) 100%);
  background-size: 220% 100%;
  -webkit-background-clip: text; background-clip: text; color: transparent;
  animation: sheen 7s linear infinite;
}
@keyframes sheen { to { background-position: 220% 0; } }
.hero p.lead { margin: 22px 0 0; max-width: 560px; font-size: 17px; color: var(--text-dim); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 34px; }
.hero-stats { display: flex; flex-wrap: wrap; gap: 34px; margin-top: 46px; padding-top: 26px; border-top: 1px solid var(--border); }
.hero-stat b { display: block; font-size: 27px; font-weight: 800; letter-spacing: -.5px; }
.hero-stat span { font-size: 13px; color: var(--text-mute); }

.hero-visual { position: relative; min-height: 400px; }
#fx-canvas { position: absolute; inset: -40px; width: calc(100% + 80px); height: calc(100% + 80px); }

/* 首屏右侧“设备拼贴” */
.hero-collage { position: relative; display: grid; gap: 16px; }
.glass-panel {
  border: 1px solid var(--border); background: var(--surface);
  border-radius: var(--radius-lg); padding: 20px; backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px); box-shadow: var(--shadow-card);
}
.panel-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 14px; }
.panel-title { font-size: 13.5px; font-weight: 700; letter-spacing: .4px; }
.panel-meta { font-size: 11.5px; color: var(--text-mute); font-family: var(--mono); }
.panel-rows { display: grid; gap: 9px; }
.panel-row { display: flex; align-items: center; gap: 10px; font-size: 13px; color: var(--text-dim); }
.panel-row .chip { width: 26px; height: 26px; border-radius: 8px; display: grid; place-items: center; background: var(--surface-2); border: 1px solid var(--border); }
.panel-row .chip svg { width: 14px; height: 14px; }
.bar { flex: 1; height: 5px; border-radius: 999px; background: var(--surface-2); overflow: hidden; }
.bar i { display: block; height: 100%; border-radius: 999px; background: linear-gradient(90deg, var(--primary), var(--accent)); width: 0; transition: width 1.2s var(--ease); }
.status-dot { width: 7px; height: 7px; border-radius: 50%; background: #34d399; box-shadow: 0 0 0 4px rgba(52,211,153,.15); }

/* ---------- 区块通用 ---------- */
.section { position: relative; padding: 92px 0; }
.section.tight { padding: 68px 0; }
.section-head { max-width: 720px; margin-bottom: 46px; }
.section-head.center { margin-inline: auto; text-align: center; }
.kicker { font-size: 12.5px; letter-spacing: 3px; text-transform: uppercase; color: var(--accent); font-family: var(--mono); }
.section-title { margin: 12px 0 0; font-size: clamp(26px, 3.1vw, 40px); line-height: 1.2; letter-spacing: -.6px; font-weight: 800; }
.section-sub { margin: 14px 0 0; color: var(--text-dim); font-size: 16px; }

.grid-4 { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 20px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }

/* ---------- 能力卡片 ---------- */
.card {
  position: relative; padding: 26px 24px 24px; border-radius: var(--radius);
  border: 1px solid var(--border); background: var(--card-bg, var(--surface));
  overflow: hidden; transition: transform .4s var(--ease), box-shadow .4s var(--ease), border-color .4s var(--ease);
}
.card::before {
  content: ""; position: absolute; inset: 0; border-radius: inherit; opacity: 0;
  background: radial-gradient(420px 200px at var(--mx, 50%) var(--my, 0%), rgba(79,107,237,.22), transparent 70%);
  transition: opacity .4s var(--ease); pointer-events: none;
}
.card:hover { transform: translateY(-6px); border-color: rgba(79,107,237,.55); box-shadow: var(--glow), var(--shadow-lift); }
.card:hover::before { opacity: 1; }
.card-icon {
  width: 50px; height: 50px; border-radius: 14px; display: grid; place-items: center;
  background: linear-gradient(140deg, rgba(79,107,237,.28), rgba(34,211,238,.14));
  border: 1px solid rgba(79,107,237,.34); margin-bottom: 18px;
  transition: transform .45s var(--ease), box-shadow .45s var(--ease), color .4s var(--ease);
}
.card-icon svg { width: 25px; height: 25px; }
.card:hover .card-icon { transform: translateY(-2px) scale(1.07) rotate(-4deg); box-shadow: 0 0 26px -6px rgba(34,211,238,.7); }
.card h3 { margin: 0 0 9px; font-size: 18px; font-weight: 700; letter-spacing: .2px; }
.card p { margin: 0; font-size: 14.2px; color: var(--text-dim); }
.card-more {
  display: inline-flex; align-items: center; gap: 7px; margin-top: 18px;
  font-size: 13.5px; font-weight: 600; color: var(--accent);
  opacity: 0; transform: translateY(6px); transition: all .4s var(--ease);
}
.card:hover .card-more { opacity: 1; transform: translateY(0); }
.card-more svg { width: 15px; height: 15px; }
.card-tags { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 14px; }
.tag {
  font-size: 11.5px; padding: 3.5px 9px; border-radius: 999px; letter-spacing: .3px;
  border: 1px solid var(--border); background: var(--surface-2); color: var(--text-mute);
}
.card-index { position: absolute; top: 20px; right: 22px; font-family: var(--mono); font-size: 12px; color: var(--text-mute); opacity: .7; }

/* ---------- 时间线式技术区（方案 C 用） ---------- */
.tech-timeline { display: grid; gap: 14px; }
.tl-item {
  position: relative; display: grid; grid-template-columns: 200px minmax(0, 1fr) 210px; gap: 26px;
  align-items: center; padding: 22px 26px; border-radius: var(--radius);
  border: 1px solid var(--border); background: var(--card-bg, var(--surface));
  transition: transform .4s var(--ease), border-color .4s var(--ease), box-shadow .4s var(--ease);
}
.tl-item:hover { transform: translateX(6px); border-color: rgba(79,107,237,.6); box-shadow: var(--glow); }
.tl-item .tl-name { display: flex; align-items: center; gap: 13px; font-weight: 700; font-size: 17px; }
.tl-item .tl-icon { width: 42px; height: 42px; border-radius: 12px; display: grid; place-items: center; background: linear-gradient(140deg, rgba(79,107,237,.3), rgba(34,211,238,.14)); border: 1px solid rgba(79,107,237,.35); }
.tl-item .tl-icon svg { width: 21px; height: 21px; }
.tl-item .tl-desc { font-size: 14.2px; color: var(--text-dim); }
.tl-item .tl-extra { font-size: 13px; color: var(--text-mute); border-left: 1px solid var(--border); padding-left: 20px; }
.tl-connector { position: relative; }

/* ---------- 案例 ---------- */
.filters { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 30px; }
.filter {
  position: relative; padding: 9px 18px; border-radius: 999px; font-size: 14px;
  border: 1px solid var(--border); background: var(--surface); color: var(--text-dim);
  transition: all .3s var(--ease);
}
.filter:hover { color: var(--text); border-color: var(--border-strong); }
.filter.on { color: #fff; background: linear-gradient(120deg, var(--primary), var(--primary-deep)); border-color: transparent; box-shadow: 0 10px 26px -14px rgba(79,107,237,1); }
.filter .cnt { font-family: var(--mono); font-size: 11.5px; opacity: .7; margin-left: 6px; }

.case-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 20px; }
.case-card {
  position: relative; border-radius: var(--radius); overflow: hidden;
  border: 1px solid var(--border); background: var(--card-bg, var(--surface));
  transition: transform .45s var(--ease), box-shadow .45s var(--ease), border-color .45s var(--ease), opacity .5s var(--ease);
}
.case-card:hover { transform: translateY(-6px); border-color: rgba(79,107,237,.5); box-shadow: var(--shadow-lift); }
.case-media { position: relative; aspect-ratio: 4 / 3; overflow: hidden; background: var(--media-bg); }
.case-media svg.art { width: 100%; height: 100%; transition: transform .6s var(--ease); }
.case-card:hover .case-media svg.art { transform: scale(1.07); }
.case-media .glowline { position: absolute; inset: 0; background: linear-gradient(180deg, transparent 45%, rgba(7,11,22,.85)); }
.case-tag {
  position: absolute; top: 12px; left: 12px; z-index: 2;
  font-size: 11px; padding: 4px 10px; border-radius: 999px; letter-spacing: .4px;
  background: rgba(7,11,22,.72); border: 1px solid var(--border); color: var(--text-dim);
  backdrop-filter: blur(8px);
}
.case-body { padding: 16px 18px 18px; }
.case-body h4 { margin: 0; font-size: 15.5px; font-weight: 700; }
.case-body p { margin: 7px 0 0; font-size: 13px; color: var(--text-mute); }
.case-hover {
  position: absolute; inset: auto 0 0 0; padding: 18px; z-index: 2;
  background: linear-gradient(0deg, rgba(7,11,22,.96), rgba(7,11,22,.6) 60%, transparent);
  transform: translateY(101%); transition: transform .45s var(--ease);
}
.case-card:hover .case-hover { transform: translateY(0); }
.case-hover strong { display: block; font-size: 15px; }
.case-hover span { display: block; font-size: 12.5px; color: var(--text-dim); margin-top: 4px; }
.case-hidden { display: none; }
.case-enter { animation: caseIn .5s var(--ease) both; }
@keyframes caseIn { from { opacity: 0; transform: translateY(16px) scale(.98); } to { opacity: 1; transform: none; } }

/* ---------- 数据 / 关于 ---------- */
.stats-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 20px; }
.stat {
  text-align: center; padding: 34px 20px; border-radius: var(--radius);
  border: 1px solid var(--border); background: var(--card-bg, var(--surface));
}
.stat b { display: block; font-size: clamp(34px, 4.4vw, 52px); font-weight: 800; letter-spacing: -1.5px;
  background: linear-gradient(120deg, var(--primary-2), var(--accent)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.stat span { display: block; margin-top: 8px; font-size: 14px; color: var(--text-dim); }

.split { display: grid; grid-template-columns: minmax(0,1fr) minmax(0,.9fr); gap: 52px; align-items: center; }
.about-copy p { color: var(--text-dim); font-size: 15.5px; }
.check-list { display: grid; gap: 13px; margin: 26px 0 0; padding: 0; list-style: none; }
.check-list li { display: flex; gap: 12px; align-items: flex-start; font-size: 14.6px; color: var(--text-dim); }
.check-list .ico { flex: 0 0 22px; width: 22px; height: 22px; border-radius: 7px; display: grid; place-items: center; background: var(--accent-soft); border: 1px solid rgba(34,211,238,.35); }
.check-list .ico svg { width: 13px; height: 13px; color: var(--accent); }

.coop-list { display: grid; gap: 14px; }
.coop {
  padding: 22px 24px; border-radius: var(--radius); border: 1px solid var(--border); background: var(--card-bg, var(--surface));
  transition: all .4s var(--ease);
}
.coop:hover { border-color: rgba(79,107,237,.6); box-shadow: var(--glow); transform: translateY(-3px); }
.coop h4 { margin: 0; font-size: 16.5px; display: flex; align-items: center; gap: 10px; }
.coop .price { margin-left: auto; font-family: var(--mono); font-size: 12.5px; color: var(--accent); }
.coop p { margin: 10px 0 0; font-size: 14px; color: var(--text-dim); max-height: 0; overflow: hidden; opacity: 0; transition: all .45s var(--ease); }
.coop:hover p { max-height: 180px; opacity: 1; }
.coop .always { max-height: none; opacity: 1; margin-top: 9px; font-size: 14px; color: var(--text-dim); }

/* ---------- CTA / Footer ---------- */
.cta {
  position: relative; overflow: hidden; border-radius: var(--radius-lg);
  border: 1px solid var(--border); padding: 62px 48px; text-align: center;
  background: var(--cta-bg); box-shadow: var(--shadow-card);
}
.cta::after {
  content: ""; position: absolute; inset: -50%;
  background: conic-gradient(from 0deg, transparent, rgba(79,107,237,.18), transparent 40%);
  animation: spin 14s linear infinite; pointer-events: none;
}
@keyframes spin { to { transform: rotate(360deg); } }
.cta > * { position: relative; z-index: 1; }
.cta h2 { margin: 0; font-size: clamp(26px, 3.2vw, 40px); font-weight: 800; letter-spacing: -.8px; }
.cta p { margin: 16px auto 30px; max-width: 620px; color: var(--text-dim); }
.cta-actions { display: flex; flex-wrap: wrap; gap: 14px; justify-content: center; }

.footer { margin-top: 92px; border-top: 1px solid var(--border); padding: 46px 0 30px; background: var(--footer-bg); }
.footer-top { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 34px; }
.footer h5 { margin: 0 0 14px; font-size: 13.5px; letter-spacing: .6px; color: var(--text); }
.footer ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 9px; }
.footer li, .footer a { font-size: 13.6px; color: var(--text-mute); }
.footer a:hover { color: var(--accent); }
.footer-bottom { margin-top: 34px; padding-top: 20px; border-top: 1px solid var(--border); display: flex; flex-wrap: wrap; gap: 12px; justify-content: space-between; font-size: 12.6px; color: var(--text-mute); }

/* ---------- 滚动入场 ---------- */
[data-reveal] { opacity: 0; transform: translateY(26px); transition: opacity .8s var(--ease), transform .8s var(--ease); }
[data-reveal].in { opacity: 1; transform: none; }
[data-reveal-delay="1"] { transition-delay: .08s; }
[data-reveal-delay="2"] { transition-delay: .16s; }
[data-reveal-delay="3"] { transition-delay: .24s; }
[data-reveal-delay="4"] { transition-delay: .32s; }
[data-reveal-delay="5"] { transition-delay: .40s; }
[data-reveal-delay="6"] { transition-delay: .48s; }
[data-reveal-delay="7"] { transition-delay: .56s; }

.fade-up { animation: fadeUp .9s var(--ease) both; }
.fade-up.d1 { animation-delay: .1s; }
.fade-up.d2 { animation-delay: .22s; }
.fade-up.d3 { animation-delay: .34s; }
.fade-up.d4 { animation-delay: .46s; }
@keyframes fadeUp { from { opacity: 0; transform: translateY(24px); } to { opacity: 1; transform: none; } }

.marquee { overflow: hidden; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); padding: 18px 0; }
.marquee-track { display: flex; gap: 46px; width: max-content; animation: slide 32s linear infinite; }
.marquee-track span { font-size: 13.5px; color: var(--text-mute); letter-spacing: 1.4px; font-family: var(--mono); white-space: nowrap; }
@keyframes slide { to { transform: translateX(-50%); } }

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .hero-inner { grid-template-columns: 1fr; gap: 46px; }
  .hero-visual { min-height: 320px; }
  .grid-4, .case-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .tl-item { grid-template-columns: 1fr; gap: 12px; }
  .tl-item .tl-extra { border-left: 0; padding-left: 0; }
  .footer-top { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 860px) {
  .wrap { width: calc(100% - 32px); }
  .nav-inner { width: calc(100% - 32px); gap: 12px; }
  .nav-links {
    position: fixed; inset: var(--nav-h) 0 auto 0; flex-direction: column; align-items: stretch; gap: 2px;
    background: var(--nav-solid); backdrop-filter: blur(20px);
    padding: 14px 16px 20px; border-bottom: 1px solid var(--border);
    transform: translateY(-120%); transition: transform .45s var(--ease);
  }
  .nav-links.open { transform: none; }
  .nav-link { padding: 13px 12px; border-radius: 10px; }
  .nav-link::after { display: none; }
  .nav-link:hover, .nav-link.active { background: var(--surface-2); }
  .burger { display: block; }
  .nav-actions .btn-hide-sm { display: none; }
  .split { grid-template-columns: 1fr; gap: 34px; }
  .stats-grid, .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .section { padding: 66px 0; }
  .hero { padding: calc(var(--nav-h) + 54px) 0 66px; }
  .hero-stats { gap: 22px; }
  .cta { padding: 44px 22px; }
  .footer-top { grid-template-columns: 1fr; gap: 26px; }
}
@media (max-width: 640px) {
  .grid-4, .case-grid { grid-template-columns: 1fr; }
  .hero-stats { gap: 18px 28px; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}

/* ---------- 方案切换条（仅原型预览用） ---------- */
.switcher {
  position: fixed; left: 50%; bottom: 22px; transform: translateX(-50%); z-index: 90;
  display: flex; align-items: center; gap: 6px; padding: 6px 8px 6px 14px;
  border-radius: 999px; border: 1px solid var(--border-strong);
  background: var(--nav-solid); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  box-shadow: var(--shadow-lift);
}
.switcher .sw-label { font-size: 12px; color: var(--text-mute); letter-spacing: .6px; margin-right: 4px; }
.switcher a {
  padding: 7px 15px; border-radius: 999px; font-size: 13px; font-weight: 600;
  color: var(--text-dim); border: 1px solid transparent; transition: all .28s var(--ease);
}
.switcher a:hover { color: var(--text); background: var(--surface-2); }
.switcher a.on { background: linear-gradient(120deg, var(--primary), var(--primary-deep)); color: #fff; box-shadow: 0 8px 22px -12px rgba(79,107,237,1); }
@media (max-width: 860px) { .switcher { bottom: 12px; } .switcher .sw-label { display: none; } }