/* ============================================================
   BigPrime 官网 · 设计系统
   主题色：克莱茵蓝 #002FA7 · 中性色体系 · 无蓝紫渐变
   ============================================================ */

:root {
  --klein: #002FA7;
  --klein-deep: #00257F;
  --klein-ink: #001B5E;
  --klein-tint: #EDF1FB;
  --klein-line: rgba(0, 47, 167, 0.14);
  --ink: #0B1220;
  --ink-80: rgba(11, 18, 32, 0.8);
  --ink-64: rgba(11, 18, 32, 0.64);
  --ink-48: rgba(11, 18, 32, 0.48);
  --line: #E4E7EF;
  --bg-soft: #F6F7FA;
  --white: #FFFFFF;
  --amber: #B45309;
  --amber-bg: #FBF3E4;
  --green: #15803D;
  --green-bg: #EAF6EE;
  --radius: 14px;
  --shadow-frame: 0 24px 60px -24px rgba(0, 27, 94, 0.28);
  --font: "Inter", "SF Pro Text", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-num: "DIN Alternate", "Bahnschrift", "Inter", "PingFang SC", sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--white);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { font-family: inherit; }

.wrap { width: min(1200px, 92vw); margin: 0 auto; }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: 90;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color .25s, box-shadow .25s;
}
.site-header.scrolled { border-bottom-color: var(--line); box-shadow: 0 8px 24px -18px rgba(11,18,32,.25); }
.header-bar { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 20px; letter-spacing: .2px; }
.brand img { width: 35px; height: 40px; }
.brand small { font-size: 11px; font-weight: 600; color: var(--ink-48); letter-spacing: 2.4px; margin-left: 2px; transform: translateY(2px); }
.main-nav { display: flex; align-items: center; gap: 34px; }
.main-nav a { font-size: 15px; font-weight: 500; color: var(--ink-64); position: relative; padding: 6px 0; transition: color .2s; }
.main-nav a:hover, .main-nav a.active { color: var(--klein); }
.main-nav a.active::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -2px; height: 2px; background: var(--klein); border-radius: 2px;
}
.main-nav a.nav-ext { display: inline-flex; align-items: center; gap: 5px; }
.main-nav a.nav-ext svg { opacity: .5; transition: opacity .2s, transform .2s; }
.main-nav a.nav-ext:hover svg { opacity: 1; transform: translate(1px, -1px); }
.header-cta {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--klein); color: #fff; font-size: 14px; font-weight: 600;
  padding: 9px 20px; border-radius: 8px; transition: background .2s, transform .2s;
}
.header-cta:hover { background: var(--klein-deep); transform: translateY(-1px); }
.nav-toggle { display: none; background: none; border: 0; cursor: pointer; }

/* ---------- 通用按钮 ---------- */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 10px; border-radius: 10px; font-weight: 600; cursor: pointer; border: 0; transition: all .22s; }
.btn-primary { background: var(--klein); color: #fff; padding: 14px 30px; font-size: 16px; box-shadow: 0 12px 28px -12px rgba(0, 47, 167, .55); }
.btn-primary:hover { background: var(--klein-deep); transform: translateY(-2px); }
.btn-ghost { background: transparent; color: var(--ink-80); padding: 14px 28px; font-size: 16px; border: 1.5px solid var(--line); }
.btn-ghost:hover { border-color: var(--klein); color: var(--klein); }
.btn-link { background: none; color: var(--klein); padding: 14px 4px; font-size: 16px; font-weight: 700; }
.btn-link:hover { text-decoration: underline; text-underline-offset: 5px; }
.btn-on-dark { background: #fff; color: var(--klein); padding: 14px 30px; font-size: 16px; }
.btn-on-dark:hover { transform: translateY(-2px); }
.btn-line-dark { background: transparent; color: rgba(255,255,255,.92); border: 1.5px solid rgba(255,255,255,.4); padding: 14px 28px; font-size: 16px; }
.btn-line-dark:hover { border-color: #fff; }

/* ---------- 章节骨架 ---------- */
.section { padding: 108px 0; }
.section-soft { background: var(--bg-soft); }
.section-dark { background: var(--klein); color: #fff; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 12.5px; font-weight: 700; letter-spacing: 3px; color: var(--klein);
  text-transform: uppercase; margin-bottom: 18px;
}
.eyebrow::before { content: ""; width: 26px; height: 2px; background: var(--klein); }
.section-dark .eyebrow { color: rgba(255,255,255,.72); }
.section-dark .eyebrow::before { background: rgba(255,255,255,.72); }
.h2 { font-size: clamp(30px, 4vw, 42px); line-height: 1.25; font-weight: 800; letter-spacing: .5px; }
.section-sub { margin-top: 16px; font-size: 16.5px; color: var(--ink-64); max-width: 720px; }
.section-dark .section-sub { color: rgba(255,255,255,.66); }
.section-head-center { text-align: center; }
.section-head-center .section-sub { margin-left: auto; margin-right: auto; }

/* ---------- Hero ---------- */
.hero {
  position: relative; overflow: hidden;
  background:
    radial-gradient(1100px 520px at 50% -12%, rgba(0, 47, 167, 0.09), transparent 68%),
    linear-gradient(180deg, #FFFFFF 0%, #F6F8FC 100%);
  padding: 168px 0 96px;
}
.hero::before { content: none; }
.hero-grid { position: relative; display: grid; grid-template-columns: 1.02fr .98fr; gap: 56px; align-items: center; }
.hero-kicker {
  display: inline-flex; align-items: center; gap: 12px; font-size: 12.5px; font-weight: 800; letter-spacing: 3px;
  color: var(--klein); text-transform: uppercase; margin-bottom: 28px;
}
.hero-kicker i { width: 26px; height: 2px; background: var(--klein); }
.hero h1 { font-size: clamp(38px, 4.8vw, 60px); line-height: 1.18; font-weight: 800; letter-spacing: 1px; }
.hero h1 em { font-style: normal; color: var(--klein); }
.hero-sub { margin: 24px 0 34px; font-size: 17px; color: var(--ink-64); max-width: 560px; }
.hero-btns { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; margin-top: 54px; }
.hero-stat { border-left: 2px solid var(--klein-line); padding-left: 16px; }
.hero-stat .num { font-family: var(--font-num); font-size: 30px; font-weight: 700; color: var(--ink); line-height: 1.1; }
.hero-stat .num sup { font-size: 15px; color: var(--klein); margin-left: 2px; }
.hero-stat .label { margin-top: 4px; font-size: 13px; color: var(--ink-48); }

/* 浏览器框截图 */
.frame {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow-frame); overflow: hidden;
}
.frame-bar { display: flex; align-items: center; gap: 7px; padding: 11px 14px; background: #F2F4F9; border-bottom: 1px solid var(--line); }
.frame-bar i { width: 10px; height: 10px; border-radius: 50%; background: #D5DAE6; }
.frame-bar i:first-child { background: #C9CFDE; }
.frame-bar span { margin-left: 10px; font-size: 12px; color: var(--ink-48); letter-spacing: .4px; }
.frame-body { padding: 10px; background: #fff; }
.frame-body img { border-radius: 8px; border: 1px solid var(--line); }
.hero .frame { transform: perspective(1400px) rotateY(-6deg) rotateX(1.5deg); transition: transform .5s; }
.hero .frame:hover { transform: perspective(1400px) rotateY(0) rotateX(0); }

/* ---------- 双产品大卡 ---------- */
.duo-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; margin-top: 56px; }
.duo-card {
  position: relative; border: 1px solid var(--line); border-radius: 18px; background: #fff;
  padding: 40px 40px 34px; overflow: hidden; transition: transform .3s, box-shadow .3s, border-color .3s;
}
.duo-card:hover { transform: translateY(-6px); box-shadow: 0 30px 60px -30px rgba(0, 27, 94, .3); border-color: var(--klein-line); }
.duo-card::after {
  content: attr(data-index); position: absolute; right: 26px; top: 18px;
  font-family: var(--font-num); font-size: 84px; font-weight: 700; color: rgba(0, 47, 167, .07); line-height: 1;
}
.duo-tag { display: inline-block; font-size: 12px; font-weight: 700; letter-spacing: 2px; color: var(--klein); background: var(--klein-tint); padding: 5px 12px; border-radius: 6px; }
.duo-card h3 { margin: 18px 0 10px; font-size: 26px; font-weight: 800; }
.duo-card p { color: var(--ink-64); font-size: 15px; min-height: 52px; }
.duo-points { display: grid; grid-template-columns: 1fr 1fr; gap: 10px 22px; margin: 22px 0 26px; }
.duo-points li { display: flex; align-items: center; gap: 9px; font-size: 14px; color: var(--ink-80); }
.duo-points li::before { content: ""; width: 6px; height: 6px; background: var(--klein); border-radius: 1.5px; flex: none; }
.duo-shot { border-radius: 10px; overflow: hidden; border: 1px solid var(--line); }
.duo-shot img { transition: transform .5s; }
.duo-card:hover .duo-shot img { transform: scale(1.03); }
.duo-link { display: inline-flex; align-items: center; gap: 8px; margin-top: 22px; font-weight: 700; color: var(--klein); font-size: 15px; }
.duo-link svg { transition: transform .25s; }
.duo-link:hover svg { transform: translateX(4px); }

/* ---------- 能力带（截图 + 文案 交替） ---------- */
.cap-row { display: grid; grid-template-columns: 1fr 1.1fr; gap: 64px; align-items: center; }
.cap-row + .cap-row { margin-top: 96px; }
.cap-row.flip .cap-text { order: 2; }
.cap-row.flip .cap-visual { order: 1; }
.cap-index { font-family: var(--font-num); font-size: 14px; font-weight: 700; letter-spacing: 3px; color: var(--klein); }
.cap-text h3 { margin: 12px 0 14px; font-size: 28px; font-weight: 800; line-height: 1.3; }
.cap-text > p { color: var(--ink-64); font-size: 15.5px; }
.cap-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 20px; }
.cap-tags span {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; color: var(--ink-80); background: #fff; border: 1px solid var(--line);
  padding: 6px 14px; border-radius: 999px;
}
.cap-tags span i { width: 8px; height: 8px; border-radius: 50%; background: var(--c, #C7CFDF); flex: none; }
.section-soft .cap-tags span { background: #fff; }
.cap-list { margin-top: 22px; display: grid; gap: 12px; }
.cap-list li { display: flex; gap: 12px; align-items: flex-start; font-size: 14.5px; color: var(--ink-80); }
.cap-list li svg { flex: none; margin-top: 3px; }

/* ---------- 数字带（克莱茵蓝） ---------- */
.band { background: var(--klein); color: #fff; position: relative; overflow: hidden; }
.band::before {
  content: ""; position: absolute; inset: 0;
  background-image: linear-gradient(rgba(255,255,255,.06) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.06) 1px, transparent 1px);
  background-size: 64px 64px;
}
.band .wrap { position: relative; }
.band-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; }
.band-item { border-top: 1px solid rgba(255,255,255,.28); padding-top: 22px; }
.band-item .num { font-family: var(--font-num); font-size: 44px; font-weight: 700; line-height: 1.05; }
.band-item .num sup { font-size: 20px; }
.band-item .label { margin-top: 8px; font-size: 14px; color: rgba(255,255,255,.72); }

/* ---------- 场景卡（融合） ---------- */
.scene-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 56px; }
.scene-card {
  background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.16);
  border-radius: 16px; padding: 30px 28px; transition: background .3s, transform .3s;
}
.scene-card:hover { background: rgba(255,255,255,.1); transform: translateY(-4px); }
.scene-card .ico { width: 46px; height: 46px; border-radius: 10px; background: rgba(255,255,255,.12); display: grid; place-items: center; }
.scene-card h4 { margin: 18px 0 10px; font-size: 18px; font-weight: 700; }
.scene-card p { font-size: 14px; color: rgba(255,255,255,.66); }

/* ---------- RoadMap 预览 ---------- */
.road-strip { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 56px; }
.road-card { border: 1px solid var(--line); border-radius: 16px; background: #fff; padding: 30px; position: relative; }
.road-card .status { position: absolute; top: 26px; right: 26px; font-size: 12px; font-weight: 700; padding: 4px 12px; border-radius: 999px; }
.status-on { color: var(--green); background: var(--green-bg); }
.status-wip { color: var(--amber); background: var(--amber-bg); }
.road-card h4 { font-size: 20px; font-weight: 800; }
.road-card .en { font-size: 12px; letter-spacing: 2px; color: var(--ink-48); font-weight: 600; margin: 2px 0 14px; }
.road-card p { font-size: 14px; color: var(--ink-64); }

/* ---------- CTA ---------- */
.cta-band { background: var(--klein); color: #fff; position: relative; overflow: hidden; }
.cta-band::before {
  content: ""; position: absolute; width: 640px; height: 640px; border-radius: 50%;
  border: 1px solid rgba(255,255,255,.14); right: -180px; top: -260px;
}
.cta-band::after {
  content: ""; position: absolute; width: 420px; height: 420px; border-radius: 50%;
  border: 1px solid rgba(255,255,255,.1); right: -70px; top: -150px;
}
.cta-inner { display: flex; align-items: center; justify-content: space-between; gap: 40px; padding: 84px 0; position: relative; }
.cta-inner h2 { font-size: clamp(28px, 3.4vw, 40px); font-weight: 800; line-height: 1.3; }
.cta-inner p { margin-top: 12px; color: rgba(255,255,255,.66); font-size: 15.5px; }

/* ---------- Footer ---------- */
.footer { background: #fff; color: var(--ink-64); border-top: 1px solid var(--line); }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 48px; padding: 72px 0 56px; }
.footer .brand { color: var(--ink); }
.footer .brand small { color: var(--ink-48); }
.footer-brand p { margin-top: 16px; font-size: 14px; max-width: 300px; }
.footer h5 { color: var(--ink); font-size: 14px; font-weight: 700; letter-spacing: 1px; margin-bottom: 18px; }
.footer li { margin-bottom: 10px; font-size: 14px; }
.footer li a:hover { color: var(--klein); }
.footer-contact .val { font-size: 14px; margin-bottom: 8px; }
.footer-bottom { border-top: 1px solid var(--line); padding: 22px 0; display: flex; justify-content: space-between; font-size: 13px; color: var(--ink-48); }

/* ---------- 子页 Hero ---------- */
.page-hero { padding: 168px 0 72px; background: radial-gradient(900px 420px at 50% -12%, rgba(0,47,167,.08), transparent 68%), linear-gradient(180deg, #fff, #F6F8FC); position: relative; overflow: hidden; }
.page-hero::before { content: none; }
.page-hero .wrap { position: relative; }
.page-hero h1 { font-size: clamp(34px, 4.4vw, 52px); font-weight: 800; line-height: 1.22; }
.page-hero .lead { margin-top: 18px; max-width: 760px; color: var(--ink-64); font-size: 17px; }
.hero-mark { display: block; margin: 0 auto 30px; height: 62px; width: auto; }

/* 模块网格 */
.mod-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 56px; }
.mod-card { border: 1px solid var(--line); border-radius: 16px; background: #fff; padding: 30px; transition: transform .3s, box-shadow .3s, border-color .3s; }
.mod-card:hover { transform: translateY(-5px); border-color: var(--klein-line); box-shadow: 0 24px 48px -28px rgba(0,27,94,.28); }
.mod-ico { width: 48px; height: 48px; border-radius: 12px; background: var(--klein-tint); display: grid; place-items: center; }
.mod-card h4 { margin: 18px 0 8px; font-size: 18px; font-weight: 800; }
.mod-card p { font-size: 14px; color: var(--ink-64); }
.mod-card .sub { margin-top: 14px; display: flex; flex-wrap: wrap; gap: 8px; }
.mod-card .sub span { font-size: 12px; color: var(--klein); background: var(--klein-tint); padding: 3px 10px; border-radius: 6px; }

/* 时间线 */
.timeline { margin-top: 64px; position: relative; padding-left: 34px; }
.timeline::before { content: ""; position: absolute; left: 8px; top: 6px; bottom: 6px; width: 2px; background: var(--line); }
.tl-item { position: relative; padding-bottom: 52px; }
.tl-item::before {
  content: ""; position: absolute; left: -32px; top: 6px; width: 14px; height: 14px; border-radius: 50%;
  background: #fff; border: 3px solid var(--klein);
}
.tl-item.future::before { border-color: #C7CDDC; }
.tl-item .phase { font-size: 13px; font-weight: 800; letter-spacing: 2px; color: var(--klein); }
.tl-item.future .phase { color: var(--ink-48); }
.tl-item h4 { margin: 6px 0 10px; font-size: 22px; font-weight: 800; }
.tl-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.tl-card { border: 1px solid var(--line); border-radius: 12px; padding: 20px 22px; background: #fff; }
.tl-card h5 { font-size: 15.5px; font-weight: 700; display: flex; align-items: center; gap: 10px; }
.tl-card p { margin-top: 6px; font-size: 13.5px; color: var(--ink-64); }
.badge { font-size: 11px; font-weight: 700; padding: 2px 10px; border-radius: 999px; }
.badge-on { color: var(--green); background: var(--green-bg); }
.badge-wip { color: var(--amber); background: var(--amber-bg); }

/* 联系页 */
.contact-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 28px; margin-top: 56px; }
.contact-card { border: 1px solid var(--line); border-radius: 16px; background: #fff; padding: 36px; }
.contact-card h4 { font-size: 19px; font-weight: 800; margin-bottom: 8px; }
.contact-card p { font-size: 14px; color: var(--ink-64); }
.contact-val { margin-top: 18px; font-family: var(--font-num); font-size: 22px; font-weight: 700; color: var(--klein); }
.contact-card img { margin-top: 18px; width: 168px; border-radius: 10px; border: 1px solid var(--line); }

/* ---------- 全链路流程带 ---------- */
.flow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; margin-top: 56px; }
.flow-step { position: relative; border: 1px solid var(--line); border-radius: 14px; background: #fff; padding: 26px 24px; }
.flow-step .n { font-family: var(--font-num); font-size: 13px; font-weight: 700; letter-spacing: 2px; color: var(--klein); }
.flow-step h4 { margin: 10px 0 8px; font-size: 18px; font-weight: 800; }
.flow-step p { font-size: 13.5px; color: var(--ink-64); }
.flow-step .tags { margin-top: 14px; display: flex; flex-wrap: wrap; gap: 6px; }
.flow-step .tags span { font-size: 12px; color: var(--klein); background: var(--klein-tint); padding: 2px 9px; border-radius: 6px; }
.flow-step::after {
  content: ""; position: absolute; top: 50%; right: -14px; width: 11px; height: 11px;
  border-top: 2px solid var(--klein); border-right: 2px solid var(--klein);
  transform: translateY(-50%) rotate(45deg); z-index: 1;
}
.flow-step:last-child::after { display: none; }
.flow-tags { margin-top: 26px; display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; }
.flow-tags span { font-size: 12.5px; color: var(--ink-64); border: 1px solid var(--line); background: #fff; padding: 4px 12px; border-radius: 999px; }

/* 治理三问 · 编辑式章节 */
.gov { margin-top: 72px; border-top: 1px solid var(--line); }
.gov-row { display: grid; grid-template-columns: 280px 1fr; gap: 56px; padding: 56px 0; border-bottom: 1px solid var(--line); }
.gov-left .g-num { font-family: var(--font-num); font-size: 64px; line-height: 1; font-weight: 700; color: rgba(0,47,167,.16); }
.gov-left h3 { margin-top: 12px; font-size: 26px; font-weight: 800; letter-spacing: -0.3px; }
.gov-left .g-en { margin-top: 8px; font-size: 11px; letter-spacing: 2.5px; color: var(--klein); font-weight: 800; }
.gov-left .desc { margin-top: 14px; font-size: 13.5px; color: var(--ink-64); line-height: 1.9; }
.gov-items { display: grid; grid-template-columns: 1fr 1fr; gap: 0 44px; align-content: start; }
.gov-item { position: relative; padding: 20px 0 22px; border-top: 1px solid var(--line); }
.gov-item .gi-n { position: absolute; top: 22px; right: 0; font-family: var(--font-num); font-size: 12px; font-weight: 700; letter-spacing: 1px; color: var(--ink-48); }
.gov-item .gi-ico { width: 36px; height: 36px; border-radius: 10px; background: var(--klein-tint); display: grid; place-items: center; margin-bottom: 12px; }
.gov-item h4 { font-size: 15.5px; font-weight: 800; }
.gov-item p { margin-top: 6px; font-size: 12.5px; color: var(--ink-64); line-height: 1.8; max-width: 420px; }
.gov-items.tri { margin-top: 56px; grid-template-columns: repeat(3, 1fr); gap: 0 36px; }

/* ---------- 苹果风视觉升级 ---------- */
.hero-center { text-align: center; padding: 168px 0 0; }
.hero-center .hero-kicker { justify-content: center; }
.hero-center h1 { font-size: clamp(40px, 5.8vw, 70px); line-height: 1.12; letter-spacing: -1px; }
.hero-center .hero-sub { margin: 26px auto 38px; max-width: 640px; font-size: 17px; line-height: 1.9; }
.hero-center .hero-btns { justify-content: center; }
.hero-media { position: relative; margin-top: 68px; padding-bottom: 96px; }
.hero-media .frame { max-width: 1160px; margin: 0 auto; box-shadow: 0 80px 140px -50px rgba(0,27,94,.4); }

.tile-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.tile { border-radius: 24px; overflow: hidden; padding: 64px 48px 0; text-align: center; display: flex; flex-direction: column; align-items: center; }
.tile .tile-mark { height: 44px; max-width: 168px; width: auto; object-fit: contain; margin-bottom: 26px; }
.tile .t-eyebrow { font-size: 12px; font-weight: 800; letter-spacing: 3px; }
.tile h3 { margin-top: 12px; font-size: clamp(28px, 3vw, 42px); font-weight: 800; letter-spacing: -0.5px; }
.tile .one-liner { margin-top: 12px; font-size: 17px; max-width: 480px; }
.tile .links { margin-top: 20px; display: flex; gap: 26px; justify-content: center; }
.tile .links a { font-size: 15px; font-weight: 600; color: var(--klein); }
.tile .links a::after { content: " ›"; }
.tile-media { margin-top: 48px; width: 100%; }
.tile-media img { width: 100%; display: block; }
.tile-light { background: #F5F7FB; }
.tile-light .t-eyebrow { color: var(--klein); }
.tile-light .one-liner { color: var(--ink-64); }
.tile-dark { background: linear-gradient(180deg, #EAF0FC, #DDE7F9); color: var(--ink); }
.tile-dark .t-eyebrow { color: var(--klein); }
.tile-dark .one-liner { color: var(--ink-64); }
.tile-dark .links a { color: var(--klein); }

.band-art { position: relative; background: #050814 center/cover no-repeat; color: #fff; padding: 130px 0; overflow: hidden; }
.band-art::before { content: ""; position: absolute; inset: 0; background: rgba(5,8,20,.55); }
.band-art .wrap { position: relative; }
.band-art .art-line { font-size: clamp(26px, 3.4vw, 44px); font-weight: 800; letter-spacing: -0.5px; text-align: center; }
.band-art .art-sub { margin-top: 14px; text-align: center; color: rgba(255,255,255,.72); font-size: 16px; }
.band-art .band-grid { margin-top: 64px; }

.grid-note { margin-top: 30px; text-align: center; color: var(--ink-48); font-size: 13.5px; }
.band-art.light { color: var(--ink); }
.band-art.light::before { background: rgba(245,247,251,.5); }
.band-art.light .art-sub { color: var(--ink-64); }

/* ---------- 理想化产品界面（手工 Mock） ---------- */
.mock { position: relative; max-width: 1080px; margin: 0 auto; background: #fff; border: 1px solid var(--line); border-radius: 18px; box-shadow: 0 70px 130px -45px rgba(0,27,94,.38); overflow: hidden; text-align: left; }
.mock-bar { display: flex; align-items: center; gap: 6px; padding: 12px 16px; background: #F5F7FB; border-bottom: 1px solid var(--line); }
.mock-bar i { width: 10px; height: 10px; border-radius: 50%; background: #D5DBE8; }
.mock-bar span { margin-left: 10px; font-size: 12px; color: var(--ink-48); }
.mock-body { display: grid; grid-template-columns: 176px 1fr; }
.mock-side { border-right: 1px solid var(--line); background: #FBFCFE; padding: 14px 10px; }
.mlogo { display: flex; align-items: center; gap: 8px; font-size: 13px; font-weight: 800; color: var(--klein-ink); padding: 2px 8px 12px; }
.mlogo b { width: 16px; height: 16px; border-radius: 5px; background: var(--klein); flex: none; }
.mnav div { display: flex; align-items: center; gap: 8px; padding: 7px 10px; border-radius: 8px; font-size: 12px; color: var(--ink-64); }
.mnav div i { width: 6px; height: 6px; border-radius: 2px; background: #C7CFDF; flex: none; }
.mnav div.on { background: var(--klein-tint); color: var(--klein); font-weight: 700; }
.mnav div.on i { background: var(--klein); }
.mock-main { background: #F8FAFD; padding: 16px 18px 20px; min-width: 0; }
.mkpis { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; }
.kpi { background: #fff; border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; }
.kpi .l { font-size: 11px; color: var(--ink-48); }
.kpi .v { margin-top: 2px; font-family: var(--font-num); font-size: 22px; font-weight: 700; color: var(--klein-ink); }
.kpi .v em { font-style: normal; font-size: 11px; font-weight: 700; color: var(--green); margin-left: 6px; }
.mgrid2 { display: grid; grid-template-columns: 1.2fr 1fr; gap: 12px; margin-top: 12px; }
.mpanel { background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 14px 16px; }
.mpanel h6 { margin: 0; font-size: 12px; font-weight: 700; color: var(--ink-64); display: flex; justify-content: space-between; align-items: center; gap: 10px; }
.mpanel h6 small { color: var(--ink-48); font-weight: 400; white-space: nowrap; }
.mbars { display: flex; align-items: flex-end; gap: 7px; height: 96px; margin-top: 14px; }
.mbars i { flex: 1; border-radius: 4px 4px 0 0; background: var(--klein-tint); }
.mbars i.hi { background: var(--klein); }
.mdag { display: block; width: 100%; height: auto; margin-top: 8px; }
.mrow { display: grid; grid-template-columns: 1.5fr 1fr .8fr auto; gap: 10px; align-items: center; padding: 8px 2px; border-bottom: 1px dashed var(--line); font-size: 11.5px; color: var(--ink-64); }
.mrow:last-child { border-bottom: 0; padding-bottom: 2px; }
.pill { font-size: 10.5px; font-weight: 700; padding: 2px 9px; border-radius: 999px; background: #E8F6EC; color: var(--green); }
.pill.warn { background: #FBF0E3; color: var(--amber); }
.pill.run { background: var(--klein-tint); color: var(--klein); }
/* 悬浮卡 */
.mfloat { position: absolute; width: 264px; background: #fff; border: 1px solid var(--line); border-radius: 14px; box-shadow: 0 30px 60px -18px rgba(0,27,94,.4); padding: 14px; text-align: left; }
.mfloat h6 { margin: 0 0 10px; font-size: 11.5px; font-weight: 800; color: var(--klein-ink); display: flex; align-items: center; gap: 7px; }
.mfloat h6 i { width: 8px; height: 8px; border-radius: 3px; background: var(--klein); }
.bub { font-size: 11.5px; line-height: 1.65; border-radius: 10px; padding: 8px 10px; margin-bottom: 8px; }
.bub:last-child { margin-bottom: 0; }
.bub.u { background: var(--klein); color: #fff; margin-left: 30px; border-bottom-right-radius: 4px; }
.bub.a { background: #F5F7FB; color: var(--ink-64); margin-right: 16px; border-bottom-left-radius: 4px; }
/* 会话型 Mock */
.mock-chat { display: grid; grid-template-columns: 1fr 236px; }
.chat-main { padding: 18px 20px 16px; background: #F8FAFD; min-width: 0; }
.chat-msg { display: flex; gap: 10px; margin-bottom: 12px; }
.chat-msg .ava { flex: none; width: 26px; height: 26px; border-radius: 8px; display: grid; place-items: center; font-size: 11px; font-weight: 800; color: #fff; background: var(--klein); }
.chat-msg.me { flex-direction: row-reverse; }
.chat-msg.me .ava { background: var(--klein-ink); }
.chat-bub { max-width: 82%; border-radius: 12px; padding: 10px 12px; font-size: 12px; line-height: 1.7; }
.chat-msg:not(.me) .chat-bub { background: #fff; border: 1px solid var(--line); color: var(--ink-64); border-top-left-radius: 4px; }
.chat-msg.me .chat-bub { background: var(--klein); color: #fff; border-top-right-radius: 4px; }
.chat-bub b { color: var(--klein); }
.chat-tags { display: flex; gap: 6px; margin-top: 8px; }
.chat-tags span { font-size: 10.5px; color: var(--klein); background: var(--klein-tint); padding: 2px 8px; border-radius: 6px; }
.chat-input { margin-top: 4px; display: flex; align-items: center; gap: 10px; background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 10px 14px; font-size: 12px; color: var(--ink-48); }
.chat-input b { margin-left: auto; flex: none; background: var(--klein); color: #fff; font-size: 11px; font-weight: 700; padding: 6px 14px; border-radius: 8px; }
.chat-side { border-left: 1px solid var(--line); background: #FBFCFE; padding: 14px 12px; }
.chat-side h6 { margin: 0 0 10px; font-size: 10.5px; letter-spacing: 2px; color: var(--ink-48); font-weight: 800; }
.agent-item { display: flex; align-items: center; gap: 9px; padding: 8px; border-radius: 10px; margin-bottom: 2px; }
.agent-item.on { background: var(--klein-tint); }
.agent-item .a-ico { flex: none; width: 26px; height: 26px; border-radius: 8px; background: #fff; border: 1px solid var(--line); }
.agent-item .a-t { font-size: 11.5px; font-weight: 700; color: var(--klein-ink); line-height: 1.3; }
.agent-item .a-s { font-size: 10.5px; color: var(--ink-48); }
/* 克莱茵蓝全幅路线带 */
.band-blue { position: relative; background: var(--klein); color: #fff; padding: 104px 0; text-align: center; overflow: hidden; }
.band-blue::before { content: ""; position: absolute; inset: 0; background: radial-gradient(760px 340px at 50% -12%, rgba(255,255,255,.18), transparent 70%); }
.band-blue .wrap { position: relative; }
.route { display: flex; align-items: center; gap: 16px; max-width: 720px; margin: 0 auto 46px; }
.route .rline { flex: 1; height: 2px; background: rgba(255,255,255,.3); position: relative; }
.route .rline i { position: absolute; top: 50%; width: 8px; height: 8px; border-radius: 50%; background: #fff; transform: translate(-50%,-50%); box-shadow: 0 0 0 5px rgba(255,255,255,.14); }
.band-blue h2 { font-size: clamp(26px, 3.4vw, 44px); font-weight: 800; letter-spacing: -0.5px; }
.band-blue p { margin: 14px auto 0; max-width: 660px; color: rgba(255,255,255,.75); font-size: 15px; }
.band-blue .band-grid { margin-top: 64px; text-align: left; }
/* 佐证截图裁剪 */
.frame-body.cap { height: 300px; overflow: hidden; }
.frame-body.cap img { width: 100%; height: 100%; object-fit: cover; object-position: top center; }
/* 瓷砖内 mini 视觉 */
.tile-vis { margin-top: 44px; width: 100%; padding: 18px 18px 22px; border-radius: 18px 18px 0 0; text-align: left; }
.tile-light .tile-vis { background: #fff; border: 1px solid var(--line); border-bottom: 0; }
.tile-dark .tile-vis { background: #fff; border: 1px solid var(--line); border-bottom: 0; }
.tile-dark .bub.u { background: var(--klein); color: #fff; }
.tile-dark .bub.a { background: #F1F4FA; color: var(--ink-64); }
.tile-vis .vis-head { display: flex; justify-content: space-between; font-size: 11px; letter-spacing: 1px; color: var(--ink-48); margin-bottom: 10px; font-weight: 700; }
.tile-dark .vis-head { color: var(--ink-48); }

/* ---------- 滚动显现 ---------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s cubic-bezier(.16,1,.3,1), transform .7s cubic-bezier(.16,1,.3,1); }
.reveal.in { opacity: 1; transform: none; }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .hero-grid, .cap-row, .contact-grid { grid-template-columns: 1fr; }
  .cap-row.flip .cap-text { order: 1; }
  .cap-row.flip .cap-visual { order: 2; }
  .duo-grid, .scene-grid, .road-strip, .mod-grid { grid-template-columns: 1fr; }
  .band-grid { grid-template-columns: 1fr 1fr; }
  .hero-stats { grid-template-columns: 1fr 1fr; }
  .main-nav { display: none; }
  .nav-toggle { display: block; }
  .main-nav.open {
    display: flex; flex-direction: column; position: absolute; top: 68px; left: 0; right: 0;
    background: #fff; border-bottom: 1px solid var(--line); padding: 20px 4vw 28px; gap: 18px; align-items: flex-start;
  }
  .cta-inner { flex-direction: column; align-items: flex-start; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .tl-cards { grid-template-columns: 1fr; }
  .flow { grid-template-columns: 1fr; }
  .flow-step::after { display: none; }
  .tile-grid { grid-template-columns: 1fr; }
  .tile { padding: 56px 24px 0; }
  .mock-body, .mock-chat { grid-template-columns: 1fr; }
  .mock-side, .chat-side, .mfloat { display: none; }
  .mkpis, .mgrid2 { grid-template-columns: 1fr 1fr; }
  .gov-row { grid-template-columns: 1fr; gap: 28px; padding: 40px 0; }
  .gov-left .g-num { font-size: 44px; }
  .gov-items { gap: 0 28px; }
  .gov-items.tri { grid-template-columns: 1fr; gap: 0; }
}