/* =========================================================
   寸鉴AI · 企业官网设计系统  v3
   严格按《寸鉴AI品牌哲学》+《寸鉴Logo品牌规范》执行
   主色：深海墨蓝 #102A43 ｜ 辅色：镜金 #C9A24B ｜ 浅底：珍珠白 #F7F4EF
   ========================================================= */

:root {
  /* 色彩 —— 取自品牌规范 */
  --ink: #102A43;          /* 深海墨蓝 — 深色区块 / 主文字 */
  --ink-2: #1A3A5C;        /* 略浅墨蓝 */
  --ink-soft: #1B3A5C;     /* 墨蓝卡片底（深色特性区） */
  --ink-line: rgba(255,255,255,0.12);
  --pearl: #F7F4EF;        /* 珍珠白 — 主背景 */
  --pearl-2: #EDE9E2;      /* 次级珍珠白 — 卡片底 */
  --pearl-3: #E3DED5;      /* 分隔 / 进度底 */
  --gold: #C9A24B;         /* 镜金 — 圆环、圆点、强调（唯一强调色） */
  --gold-deep: #A68238;    /* 深镜金 — hover / 重音 */
  --text: #102A43;
  --text-muted: #5A6A7A;
  --text-faint: #8E9AA6;
  --line: rgba(16,42,67,0.12);
  --line-2: rgba(16,42,67,0.22);

  /* 字体 —— 取自品牌规范 */
  --sans: "Noto Sans SC", "Microsoft YaHei", "PingFang SC", -apple-system,
          BlinkMacSystemFont, "Helvetica Neue", "Segoe UI", Roboto, Arial, sans-serif;
  --serif: "Source Han Serif SC", "Songti SC", "STSong", "SimSun", Georgia,
           "Times New Roman", serif;
  --mono: "IBM Plex Mono", "SF Mono", "Consolas", "Menlo", monospace;

  /* 间距（8pt 栅格） */
  --s-1: 8px;  --s-2: 16px; --s-3: 24px; --s-4: 32px;
  --s-5: 48px; --s-6: 64px; --s-7: 96px; --s-8: 128px;

  /* 圆角 —— 克制 */
  --r-sm: 3px; --r-md: 8px; --r-lg: 14px;

  /* 阴影 —— 极克制 */
  --sh-1: 0 1px 2px rgba(16,42,67,0.04);
  --sh-2: 0 10px 36px rgba(16,42,67,0.08);
  --sh-3: 0 30px 70px rgba(0,0,0,0.32);

  --maxw: 1200px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--sans);
  color: var(--text);
  background: var(--pearl);
  line-height: 1.7;
  font-size: 15px;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

/* ---------- 通用排版 ---------- */
.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 32px; }

.kicker {
  display: inline-flex; align-items: center; gap: 12px;
  font-size: 14px; letter-spacing: 0.12em; text-transform: uppercase;
  font-weight: 700; color: var(--gold-deep);
}
.kicker::before {
  content: ""; width: 32px; height: 2px; background: var(--gold);
}
.kicker.on-dark { color: var(--gold); }
.hero .kicker.on-dark { font-size: 15px; letter-spacing: 0.13em; }

h1, h2, h3, h4 { line-height: 1.16; font-weight: 700; letter-spacing: -0.015em; text-wrap: pretty; }
.display { font-size: clamp(38px, 5.2vw, 64px); line-height: 1.06; letter-spacing: -0.03em; font-weight: 700; }
.display .em { color: var(--gold); font-family: var(--serif); font-weight: 700; }
.h1 { font-size: clamp(27px, 3.2vw, 40px); }
.h2 { font-size: clamp(22px, 2.7vw, 31px); }
.h3 { font-size: clamp(18px, 1.8vw, 21px); }
.lead { font-size: clamp(15px, 1.2vw, 17px); color: var(--text-muted); line-height: 1.8; }
.muted { color: var(--text-muted); }
.faint { color: var(--text-faint); }

.section { padding: var(--s-8) 0; }
.section-sm { padding: var(--s-7) 0; }
.section-tight { padding: var(--s-6) 0; }

.section-head { max-width: 720px; margin-bottom: var(--s-5); }
.section-head .h2 { margin: 18px 0 18px; }
.section-head .lead { max-width: 60ch; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-head.center .kicker { justify-content: center; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  padding: 15px 30px; border-radius: var(--r-sm);
  font-size: 15px; font-weight: 600; letter-spacing: 0.02em;
  cursor: pointer; border: 1px solid transparent; transition: all .25s ease;
  white-space: nowrap;
}
.btn-primary { background: var(--gold); color: var(--ink); }
.btn-primary:hover { color: var(--ink); }
.btn-primary:hover { background: var(--gold-deep); transform: translateY(-2px); box-shadow: 0 12px 30px rgba(201,162,75,0.30); }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--line-2); }
.btn-ghost:hover { border-color: var(--ink); transform: translateY(-2px); }
.btn-ghost.on-dark { color: #fff; border-color: var(--ink-line); }
.btn-ghost.on-dark:hover { border-color: rgba(255,255,255,0.7); background: rgba(255,255,255,0.05); }
.btn-arrow::after { content: "→"; font-size: 16px; transition: transform .25s ease; }
.btn-arrow:hover::after { transform: translateX(5px); }

/* ---------- 顶部导航 + 图片 Logo ---------- */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(247,244,239,0.0);
  transition: background .35s ease, box-shadow .35s ease, border-color .35s ease;
  border-bottom: 1px solid transparent;
}
.site-header.scrolled {
  background: rgba(247,244,239,0.92);
  backdrop-filter: saturate(180%) blur(16px);
  -webkit-backdrop-filter: saturate(180%) blur(16px);
  border-bottom: 1px solid var(--line);
}
.site-header.hero-dark:not(.scrolled) .nav-link { color: #fff; }
.site-header.hero-dark:not(.scrolled) .nav-toggle span,
.site-header.hero-dark:not(.scrolled) .nav-toggle span::before,
.site-header.hero-dark:not(.scrolled) .nav-toggle span::after { background: #fff; }
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 74px; }

.brand { display: inline-flex; align-items: center; }
.brand-logo { height: 34px; width: auto; display: block; }
.logo-dark { display: none; }
.site-header.hero-dark:not(.scrolled) .logo-light { display: none; }
.site-header.hero-dark:not(.scrolled) .logo-dark { display: block; }

.nav-links { display: flex; align-items: center; gap: 32px; }
.nav-link { font-size: 14px; font-weight: 500; color: var(--text); position: relative; padding: 6px 0; transition: color .2s ease; }
.nav-link::after { content: ""; position: absolute; left: 0; bottom: 0; height: 2px; width: 0; background: var(--gold); transition: width .25s ease; }
.nav-link:hover { color: var(--gold-deep); }
.nav-link.active { color: var(--gold-deep); }
.nav-link.active::after { width: 100%; }
.nav-cta { margin-left: 8px; }

.nav-toggle { display: none; width: 42px; height: 42px; border: 1px solid var(--line-2); border-radius: var(--r-sm); background: transparent; cursor: pointer; align-items: center; justify-content: center; }
.nav-toggle span { display: block; width: 18px; height: 2px; background: var(--ink); position: relative; }
.nav-toggle span::before, .nav-toggle span::after { content: ""; position: absolute; left: 0; width: 18px; height: 2px; background: var(--ink); }
.nav-toggle span::before { top: -6px; } .nav-toggle span::after { top: 6px; }

/* ---------- 页脚 ---------- */
.site-footer { background: var(--pearl-2); color: var(--text); padding: var(--s-7) 0 var(--s-4); border-top: 1px solid var(--line); }
.site-footer .brand-logo { height: 40px; }
.footer-top { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.5fr; gap: var(--s-5); }
.footer-brand .brand { margin-bottom: 14px; }
.footer-slogan { font-family: var(--serif); font-size: 15px; color: var(--ink); letter-spacing: .02em; margin-bottom: 14px; line-height: 1.5; }
.footer-slogan .en { display: block; font-family: var(--mono); font-size: 11px; letter-spacing: .14em; color: var(--gold-deep); margin-top: 4px; text-transform: uppercase; }
.footer-brand p { color: var(--text-muted); font-size: 14px; max-width: 320px; }
.footer-col h4 { color: var(--ink); font-size: 12px; letter-spacing: .18em; text-transform: uppercase; margin-bottom: 18px; opacity: .85; }
.footer-col a { display: block; color: var(--text); font-size: 14px; padding: 6px 0; transition: color .2s ease; }
.footer-col a:hover { color: var(--gold-deep); }
.footer-contact h4 { color: var(--ink); font-size: 12px; letter-spacing: .18em; text-transform: uppercase; margin-bottom: 16px; opacity: .85; }
.footer-contact .f-line { font-size: 14px; color: var(--text); line-height: 1.9; margin: 0; }
.footer-contact .f-line strong { color: var(--ink); font-weight: 600; margin-right: 8px; }
.footer-qr { display: inline-flex; align-items: center; gap: 12px; margin-top: 16px; }
.footer-qr img { width: 72px; height: 72px; object-fit: contain; border-radius: var(--r-sm); }
.footer-qr span { font-size: 12px; color: var(--text-muted); }
.footer-bottom { margin-top: var(--s-5); padding-top: var(--s-3); border-top: 1px solid var(--line); display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; font-size: 13px; color: var(--text-muted); }
.footer-bottom .dot { color: var(--gold-deep); }

/* 兼容旧版页面仍用 .eyebrow */
.eyebrow { display: inline-flex; align-items: center; gap: 12px; font-size: 14px; letter-spacing: 0.12em; text-transform: uppercase; font-weight: 700; color: var(--gold-deep); }
.eyebrow::before { content: ""; width: 32px; height: 2px; background: var(--gold); }
.eyebrow.on-dark { color: var(--gold); }

/* 通用小标签 */
.tag { display: inline-block; font-size: 12px; letter-spacing: .14em; text-transform: uppercase; color: var(--gold-deep); font-weight: 700; margin-bottom: 6px; }

/* =========================================================
   测量母题：刻度尺
   ========================================================= */
.ruler {
  position: relative; height: 54px;
  border-top: 1px solid var(--line-2);
  background-image: repeating-linear-gradient(90deg,
    var(--line-2) 0 1px, transparent 1px 8.3333%);
  background-position: 0 0;
}
.ruler .ruler-num {
  position: absolute; top: 12px; transform: translateX(-50%);
  font-family: var(--serif); font-size: 13px; color: var(--text-faint);
}
.ruler .ruler-num::before {
  content: ""; position: absolute; left: 50%; top: -12px; width: 1px; height: 8px;
  background: var(--gold);
}
.tick-divider { height: 1px; background: var(--line); position: relative; }
.tick-divider::before {
  content: ""; position: absolute; left: 0; top: -4px; width: 40px; height: 9px;
  background-image: repeating-linear-gradient(90deg, var(--gold) 0 1px, transparent 1px 5px);
}

/* =========================================================
   HERO — 编辑级：左文 + 右侧“诊断报告”光面板
   ========================================================= */
.hero {
  position: relative; background: var(--ink); color: #fff; overflow: hidden;
  min-height: 92vh; display: flex; flex-direction: column; justify-content: center;
}
/* 净面背景：只保留右下角“鉴”字水纹，去掉竖纹/光晕 */
.hero-mark {
  position: absolute; right: 2%; bottom: -8%; z-index: 0;
  font-family: var(--serif); font-size: 38vh; line-height: 1;
  color: transparent; -webkit-text-stroke: 1px rgba(255,255,255,0.10);
  font-weight: 700; user-select: none; pointer-events: none;
}
.hero-grid {
  position: relative; z-index: 2; display: grid; grid-template-columns: 1.12fr 0.88fr;
  gap: var(--s-6); align-items: center; padding: 128px 0 72px; width: 100%;
}
.hero h1 { color: #fff; max-width: 18ch; }
.hero .display { font-size: clamp(40px, 5.6vw, 68px); line-height: 1.1; }
.hero h1 .em { color: var(--gold); font-family: var(--serif); }
.hero-lead {
  margin-top: 22px; max-width: none;
  font-size: clamp(18px, 1.6vw, 22px); font-weight: 600; color: #fff; letter-spacing: 0.01em;
  white-space: nowrap;
}
.hero-sub { margin-top: 18px; max-width: 52ch; color: rgba(255,255,255,0.74); font-size: clamp(15px,1.1vw,17px); }
.hero-actions { margin-top: 40px; display: flex; gap: 16px; flex-wrap: wrap; }

/* 右侧诊断报告光面板 */
.report {
  background: var(--pearl); color: var(--text); border-radius: var(--r-lg);
  padding: 30px 30px 26px; box-shadow: var(--sh-3); position: relative; overflow: hidden;
}
.report::after {
  content: ""; position: absolute; left: 0; top: 0; width: 4px; height: 100%; background: var(--gold);
}
.report .r-top { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 4px; }
.report .r-top .t { font-size: 12px; letter-spacing: .16em; text-transform: uppercase; color: var(--text-muted); font-weight: 700; }
.report .r-top .badge { font-size: 11px; font-weight: 700; color: var(--gold-deep); border: 1px solid rgba(201,162,75,0.45); border-radius: 999px; padding: 3px 10px; }
.report .r-title { font-family: var(--serif); font-size: 22px; font-weight: 700; letter-spacing: -.01em; margin: 6px 0 2px; }
.report .r-sub { font-size: 13px; color: var(--text-muted); margin-bottom: 18px; }
.metric { display: grid; grid-template-columns: 1fr auto; gap: 8px 12px; align-items: baseline; padding: 14px 0; border-top: 1px solid var(--line); }
.metric .m-k { font-size: 14px; color: var(--text); font-weight: 600; }
.metric .m-v { font-family: var(--serif); font-size: 20px; font-weight: 700; color: var(--ink); }
.metric .m-v em { font-style: normal; color: var(--gold); font-size: 13px; margin-left: 5px; }
.metric .m-bar { grid-column: 1 / -1; height: 5px; border-radius: 3px; background: var(--pearl-3); overflow: hidden; }
.metric .m-bar i { display: block; width: 0; height: 100%; background: linear-gradient(90deg, var(--gold-deep), var(--gold)); border-radius: 3px; transition: width 1.1s cubic-bezier(.22,1,.36,1); }
.metric .m-v { font-family: var(--serif); font-size: 20px; font-weight: 700; color: var(--ink); font-variant-numeric: tabular-nums; }
.metric .m-v b { font: inherit; font-weight: 700; }
.metric .m-v.delay { opacity: 0; transform: translateY(6px); transition: opacity .6s ease .85s, transform .6s ease .85s; }
.report.is-in .m-v.delay { opacity: 1; transform: none; }

.hero-foot { position: relative; z-index: 2; border-top: 1px solid var(--ink-line); margin-top: 8px; }
.hero-metrics { display: grid; grid-template-columns: repeat(4, 1fr); }
.hero-metrics .m { padding: 30px 0 34px; border-right: 1px solid var(--ink-line); }
.hero-metrics .m:last-child { border-right: none; }
.hero-metrics .m .num { font-family: var(--serif); font-size: clamp(28px, 2.8vw, 38px); font-weight: 700; color: #fff; letter-spacing: -0.02em; }
.hero-metrics .m .num span { color: var(--gold); }
.hero-metrics .m .lab { font-size: 13px; color: rgba(255,255,255,0.55); letter-spacing: .03em; margin-top: 6px; }

/* ---------- 步骤流 ---------- */
.flow { display: grid; grid-template-columns: repeat(5, 1fr); gap: 0; }
.flow .node { padding: 6px 22px 6px 0; position: relative; border-left: 1px solid var(--line); padding-left: 22px; }
.flow .node:first-child { border-left: none; padding-left: 0; }
.flow .node .idx { font-family: var(--serif); font-size: 34px; font-weight: 700; color: var(--gold); line-height: 1; }
.flow .node h3 { margin: 12px 0 8px; font-size: 18px; }
.flow .node p { font-size: 14px; color: var(--text-muted); }

/* ---------- 卡片 ---------- */
.card {
  background: var(--pearl); border: 1px solid var(--line); border-radius: var(--r-md);
  padding: var(--s-4); transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease;
  position: relative; overflow: hidden;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--sh-2); border-color: var(--line-2); }
.card::before { content: ""; position: absolute; left: 0; top: 0; width: 100%; height: 3px; background: var(--gold); transform: scaleX(0); transform-origin: left; transition: transform .35s ease; }
.card:hover::before { transform: scaleX(1); }
.card .ic {
  width: 38px; height: 38px; border: 1px solid var(--line-2); border-radius: var(--r-sm);
  display: flex; align-items: center; justify-content: center; margin-bottom: 18px; color: var(--gold-deep);
}
.card .ic svg { width: 20px; height: 20px; }
.card h3 { font-size: 18px; margin-bottom: 10px; }
.card p { font-size: 14.5px; color: var(--text-muted); }

/* 关于寸鉴事实卡紧凑版 */
#about .card { padding: 22px; }
#about .card .ic { width: 34px; height: 34px; margin-bottom: 14px; }
#about .card .ic svg { width: 18px; height: 18px; }

/* 图标+文字横向排列的紧凑卡片 */
.card.card-horizontal {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: start;
  gap: 14px;
  padding: 18px 20px;
}
.card.card-horizontal .ic {
  grid-row: 1 / span 2;
  width: 34px; height: 34px;
  margin-bottom: 0;
  margin-top: 2px;
}
.card.card-horizontal .ic svg { width: 18px; height: 18px; }
.card.card-horizontal h3 {
  grid-column: 2;
  font-size: 16px;
  margin: 0 0 4px;
  line-height: 1.4;
}
.card.card-horizontal p {
  grid-column: 2;
  font-size: 13.5px;
  line-height: 1.55;
  margin: 0;
}

.grid { display: grid; gap: var(--s-3); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.step-card { position: relative; padding: 30px 28px; border: 1px solid var(--line); border-radius: var(--r-md); background: var(--pearl); overflow: hidden; }
.step-card .idx { font-family: var(--serif); font-size: 46px; font-weight: 700; color: var(--pearl-3); line-height: 1; position: absolute; right: 18px; top: 8px; }
.step-card .tag { font-size: 12px; letter-spacing: .14em; text-transform: uppercase; color: var(--gold-deep); font-weight: 700; }
.step-card h3 { margin: 10px 0 10px; font-size: 18px; }
.step-card p { font-size: 14.5px; color: var(--text-muted); }

/* 深色特性条 */
.feature-band { background: var(--ink); color: #fff; }
.feature-band .kicker { color: var(--gold); }
.feature-band h2 { color: #fff; }
.feature-band .lead { color: rgba(255,255,255,0.7); }

/* 闭环流程 */
.loop { display: grid; grid-template-columns: repeat(5, 1fr); gap: 0; align-items: stretch; position: relative; }
.loop .node { padding: 30px 22px; border-top: 2px solid var(--gold); position: relative; }
.loop .node::after {
  content: "→"; position: absolute; right: -10px; top: 36px; color: rgba(255,255,255,0.3); font-size: 18px; z-index: 3;
}
.loop .node:last-child::after { display: none; }
.loop .node .n { font-family: var(--serif); font-size: 26px; color: var(--gold); font-weight: 700; }
.loop .node h3, .loop .node h4 { color: #fff; font-size: 16px; margin: 8px 0 8px; }
.loop .node p { color: rgba(255,255,255,0.6); font-size: 13.5px; }

/* 列表块 */
.checklist li { position: relative; padding-left: 30px; margin: 12px 0; color: var(--text-muted); font-size: 14.5px; }
.checklist li::before { content: ""; position: absolute; left: 0; top: 9px; width: 16px; height: 16px; border-radius: 3px; background: var(--gold); }
.checklist li::after { content: ""; position: absolute; left: 5px; top: 13px; width: 6px; height: 3px; border-left: 2px solid #fff; border-bottom: 2px solid #fff; transform: rotate(-45deg); }

/* 分栏 */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: var(--s-6); align-items: center; }
.split.wide { grid-template-columns: 0.9fr 1.1fr; }

/* 首页项目体系预览：紧凑右侧卡片 */
.project-split { grid-template-columns: 1fr 0.92fr; gap: var(--s-5); align-items: start; }
.project-split .grid { gap: 16px; }
.project-split .card { padding: 22px; }
.project-split .card .ic { width: 34px; height: 34px; margin-bottom: 12px; }
.project-split .card .ic svg { width: 18px; height: 18px; }
.project-split .card h3 { font-size: 17px; margin-bottom: 8px; }
.project-split .card p { font-size: 13.5px; line-height: 1.6; }

/* 统计 */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--s-4); }
.stat { text-align: left; border-left: 1px solid var(--line); padding-left: 20px; }
.stat .num { font-family: var(--serif); font-size: clamp(28px, 3vw, 40px); font-weight: 700; letter-spacing: -0.02em; color: var(--ink); }
.stat .num span { color: var(--gold); }
.stat .lab { font-size: 14px; color: var(--text-muted); margin-top: 6px; }

/* CTA 区块 */
.cta { background: var(--ink); color: #fff; border-radius: var(--r-lg); padding: var(--s-7) var(--s-6); text-align: center; position: relative; overflow: hidden; }
.cta::before { content: ""; position: absolute; width: 420px; height: 420px; left: -120px; bottom: -180px; background: radial-gradient(circle, rgba(201,162,75,0.20), transparent 60%); }
.cta .cta-mark { position: absolute; right: 3%; top: -10%; font-family: var(--serif); font-size: 200px; color: transparent; -webkit-text-stroke: 1px rgba(255,255,255,0.08); font-weight: 700; pointer-events: none; }
.cta h2 { color: #fff; max-width: 20ch; margin: 0 auto 16px; position: relative; }
.cta p { color: rgba(255,255,255,0.72); max-width: 52ch; margin: 0 auto 30px; position: relative; }
.cta .hero-actions { justify-content: center; position: relative; }

/* 页头 */
.page-hero { background: var(--ink); color: #fff; padding: 115px 0 70px; position: relative; overflow: hidden; }
.page-hero .container { position: relative; z-index: 2; }
.page-hero h1 { color: #fff; margin: 14px 0 16px; max-width: 26ch; }
.page-hero p { color: rgba(255,255,255,0.72); max-width: 56ch; }
.page-hero h1 .lead-line { display: inline-block; white-space: nowrap; font-size: 0.92em; }

/* 表格 */
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--r-md); }
table { width: 100%; border-collapse: collapse; min-width: 600px; }
th, td { text-align: left; padding: 14px 18px; border-bottom: 1px solid var(--line); font-size: 14px; }
th { background: var(--pearl-2); font-weight: 600; letter-spacing: .02em; }
td:first-child { font-weight: 600; }
tr:last-child td { border-bottom: none; }

/* 标签 pill */
.pill { display: inline-block; padding: 6px 14px; border: 1px solid var(--line-2); border-radius: 999px; font-size: 13px; color: var(--text-muted); margin: 4px 6px 4px 0; }
.pill.on { background: rgba(201,162,75,0.10); border-color: rgba(201,162,75,0.35); color: var(--gold-deep); font-weight: 600; }

/* 案例 */
.case-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--s-4); }
.case-card { border: 1px solid var(--line); border-radius: var(--r-md); overflow: hidden; background: var(--pearl); display: flex; flex-direction: column; transition: transform .3s ease, box-shadow .3s ease; }
.case-card:hover { transform: translateY(-4px); box-shadow: var(--sh-2); }
.case-card .case-head { padding: 26px 28px; border-bottom: 1px solid var(--line); border-top: 3px solid var(--gold); }
.case-card .case-head .ind { font-size: 12px; letter-spacing: .14em; text-transform: uppercase; color: var(--gold-deep); font-weight: 700; }
.case-card .case-head h3 { font-size: 19px; margin-top: 8px; }
.case-card .case-body { padding: 24px 28px 28px; flex: 1; }
.case-block { margin-bottom: 16px; }
.case-block .k { font-size: 13px; font-weight: 700; letter-spacing: .04em; color: var(--text); margin-bottom: 5px; }
.case-block .v { font-size: 14.5px; color: var(--text-muted); }
.case-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 6px; }
.case-tag { font-size: 12px; padding: 4px 10px; background: var(--pearl-2); border-radius: 999px; color: var(--text-muted); }

/* 文章卡片（通用组件，当前无页面引用，保留备用） */
.insight-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--s-4); }
.insight-card { border: 1px solid var(--line); border-radius: var(--r-md); overflow: hidden; background: var(--pearl); display: flex; flex-direction: column; transition: transform .3s ease, box-shadow .3s ease; }
.insight-card:hover { transform: translateY(-4px); box-shadow: var(--sh-2); }
.insight-card .thumb { height: 168px; background: linear-gradient(135deg, var(--ink), var(--ink-2)); position: relative; overflow: hidden; }
.insight-card .thumb .lab { position: absolute; left: 18px; bottom: 16px; font-size: 12px; letter-spacing: .12em; text-transform: uppercase; color: var(--gold); font-weight: 700; }
.insight-card .thumb .deco { position: absolute; right: -30px; top: -30px; width: 150px; height: 150px; border: 1px solid rgba(255,255,255,0.14); border-radius: 50%; transition: transform .5s ease; }
.insight-card .thumb .deco::after { content: ""; position: absolute; inset: 30px; border: 1px solid rgba(255,255,255,0.10); border-radius: 50%; }
.insight-card .thumb .num { position: absolute; right: 20px; top: 12px; font-family: var(--serif); font-size: 42px; font-weight: 700; color: var(--gold); line-height: 1; opacity: .9; }
/* 每张缩略图不同的几何母题，消除模板感 */
.insight-grid > .insight-card:nth-child(2) .thumb .deco { border-radius: 0; transform: rotate(45deg); }
.insight-grid > .insight-card:nth-child(3) .thumb .deco { border: none; background: repeating-linear-gradient(45deg, rgba(255,255,255,0.14) 0 1px, transparent 1px 13px); }
.insight-grid > .insight-card:nth-child(4) .thumb .deco { border-radius: 50%; border-style: dashed; }
.insight-grid > .insight-card:nth-child(5) .thumb .deco { border-radius: 0; border-width: 2px; }
.insight-grid > .insight-card:nth-child(6) .thumb .deco { border: none; background: repeating-linear-gradient(0deg, rgba(255,255,255,0.14) 0 1px, transparent 1px 13px); }
.insight-grid > .insight-card:nth-child(3) .thumb .deco::after,
.insight-grid > .insight-card:nth-child(6) .thumb .deco::after { display: none; }
.insight-card .body { padding: 24px 26px 28px; flex: 1; display: flex; flex-direction: column; }
.insight-card .body h3 { font-size: 18px; margin-bottom: 10px; line-height: 1.35; }
.insight-card .body p { font-size: 14.5px; color: var(--text-muted); flex: 1; }
.insight-card .more { margin-top: 16px; font-size: 14px; font-weight: 600; color: var(--gold-deep); }

/* 联系表单 */
.contact-wrap { display: grid; grid-template-columns: 1fr 1fr; gap: var(--s-6); align-items: start; }
.form-field { margin-bottom: 20px; }
.form-field label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 8px; color: var(--text); }
.form-field input, .form-field textarea, .form-field select {
  width: 100%; padding: 13px 15px; border: 1px solid var(--line-2); border-radius: var(--r-sm);
  font-family: var(--sans); font-size: 14.5px; color: var(--text); background: #fff; transition: border-color .2s ease, box-shadow .2s ease;
}
.form-field input:focus, .form-field textarea:focus, .form-field select:focus { outline: none; border-color: var(--gold); box-shadow: 0 0 0 3px rgba(201,162,75,0.14); }
.form-field textarea { resize: vertical; min-height: 120px; }
.form-note { font-size: 13px; color: var(--text-faint); margin-top: 10px; }
.form-success { display: none; padding: 16px 18px; border: 1px solid rgba(201,162,75,0.35); background: rgba(201,162,75,0.08); border-radius: var(--r-sm); color: var(--gold-deep); font-size: 14.5px; margin-top: 16px; }
.form-success.show { display: block; }

.info-list div { padding: 14px 0; border-bottom: 1px solid var(--line); }
.info-list .k { font-size: 13px; color: var(--text-faint); letter-spacing: .04em; }
.info-list .v { font-size: 15px; color: var(--text); font-weight: 600; margin-top: 3px; }

/* 声明条 */
.notice { background: var(--pearl-2); border: 1px solid var(--line); border-left: 3px solid var(--gold); border-radius: var(--r-sm); padding: 16px 20px; font-size: 14px; color: var(--text-muted); }

/* ---------- FAQ 手风琴 ---------- */
.faq { max-width: 860px; margin: 0 auto; }
.faq-item {
  border: 1px solid var(--line); border-radius: var(--r-md); background: var(--pearl);
  margin-bottom: 14px; overflow: hidden; transition: border-color .25s ease, box-shadow .25s ease;
}
.faq-item:last-child { margin-bottom: 0; }
.faq-item.open { border-color: var(--line-2); box-shadow: var(--sh-1); }
.faq-q {
  width: 100%; text-align: left; background: transparent; border: 0; cursor: pointer;
  display: flex; align-items: center; justify-content: space-between; gap: 20px;
  padding: 22px 24px; font-family: var(--sans); font-size: clamp(15px, 1.2vw, 17px);
  font-weight: 600; color: var(--text); line-height: 1.5; transition: color .2s ease;
}
.faq-q:hover { color: var(--gold-deep); }
.faq-ic {
  flex: 0 0 auto; position: relative; width: 26px; height: 26px;
  border-radius: 50%; border: 1px solid var(--line-2); transition: background .25s ease, border-color .25s ease;
}
.faq-ic::before, .faq-ic::after {
  content: ""; position: absolute; left: 50%; top: 50%; background: var(--gold-deep);
  transition: transform .3s ease, background .25s ease;
}
.faq-ic::before { width: 11px; height: 2px; transform: translate(-50%, -50%); }
.faq-ic::after { width: 2px; height: 11px; transform: translate(-50%, -50%); }
.faq-item.open .faq-ic { background: var(--gold); border-color: var(--gold); }
.faq-item.open .faq-ic::before, .faq-item.open .faq-ic::after { background: var(--ink); }
.faq-item.open .faq-ic::after { transform: translate(-50%, -50%) scaleY(0); }
.faq-a { display: grid; grid-template-rows: 0fr; transition: grid-template-rows .35s cubic-bezier(.22,1,.36,1); }
.faq-item.open .faq-a { grid-template-rows: 1fr; }
.faq-a > div { overflow: hidden; min-height: 0; }
.faq-a p { padding: 0 24px 22px; margin: 0; font-size: 14.5px; color: var(--text-muted); line-height: 1.8; }

/* 知识图谱 + FAQ 双栏（知识页） */
.knowledge-split { align-items: start; gap: var(--s-6); }
.knowledge-split .faq { max-width: none; margin: 0; }
.kgraph { margin: 4px 0 22px; }
.kgraph svg { width: 100%; max-width: 440px; height: auto; display: block; }
.kgraph-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 4px; }
.kgraph-tags .pill { margin: 0; }
@media (max-width: 760px) {
  .knowledge-split { grid-template-columns: 1fr; gap: var(--s-5); }
  .kgraph svg { max-width: 360px; margin: 0 auto; }
}

/* 滚动揭示动画 */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s cubic-bezier(.2,.7,.2,1), transform .7s cubic-bezier(.2,.7,.2,1); }
.reveal.in { opacity: 1; transform: none; }
.reveal[data-d="1"] { transition-delay: .08s; }
.reveal[data-d="2"] { transition-delay: .16s; }
.reveal[data-d="3"] { transition-delay: .24s; }
.reveal[data-d="4"] { transition-delay: .32s; }

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .footer-top { grid-template-columns: 1fr 1fr; gap: var(--s-4); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .insight-grid { grid-template-columns: repeat(2, 1fr); }
  .flow, .loop { grid-template-columns: repeat(2, 1fr); }
  .flow .node, .loop .node { border-left: 1px solid var(--line); padding-left: 22px; }
  .flow .node:first-child { border-left: 1px solid var(--line); }
  .loop .node::after { display: none; }
  .hero-grid { grid-template-columns: 1fr; gap: var(--s-5); }
  .hero-mark { display: none; }
}
@media (max-width: 760px) {
  body { font-size: 16px; }
  .container { padding: 0 20px; }
  .section { padding: var(--s-6) 0; }
  .section-sm { padding: var(--s-6) 0; }
  .brand-logo { height: 30px; }
  .nav-links { position: fixed; top: 74px; left: 0; right: 0; background: rgba(247,244,239,0.98); backdrop-filter: blur(14px); flex-direction: column; align-items: flex-start; gap: 0; padding: 12px 20px 24px; border-bottom: 1px solid var(--line); transform: translateY(-130%); transition: transform .35s ease; box-shadow: var(--sh-2); }
  .nav-links.open { transform: translateY(0); }
  .nav-link { width: 100%; padding: 14px 0; border-bottom: 1px solid var(--line); font-size: 16px; }
  .nav-link::after { display: none; }
  .nav-cta { margin: 14px 0 0; width: 100%; }
  .nav-cta .btn { width: 100%; }
  .nav-toggle { display: flex; }
  .grid-2, .grid-3, .grid-4, .case-grid, .insight-grid, .stats, .split, .contact-wrap { grid-template-columns: 1fr; }
  .flow, .loop { grid-template-columns: 1fr; }
  .hero { min-height: auto; }
  .hero-grid { padding: 120px 0 64px; }
  .hero-metrics { grid-template-columns: 1fr 1fr; }
  .hero-metrics .m:nth-child(2) { border-right: none; }
  .hero-metrics .m { border-bottom: 1px solid var(--ink-line); }
  .footer-top { grid-template-columns: 1fr; }
}

/* 锚点平滑滚动，避开固定头 */
html { scroll-behavior: smooth; }
#about { scroll-margin-top: 92px; }

/* ---------- 子项目嵌套块（项目页） ----------
   沿用既有设计令牌：镜金左边条 + 珍珠白底 + 既有圆角/间距
   仅新增类名，不改动任何已有规则 */
.sub-project {
  position: relative;
  margin-top: var(--s-5);
  padding: var(--s-4);
  background: var(--pearl);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  overflow: hidden;
}
.sub-project::before {
  content: ""; position: absolute; left: 0; top: 0; width: 3px; height: 100%;
  background: var(--gold);
}
.sub-project.tint { background: var(--pearl-2); }
.sub-badge {
  display: inline-block;
  font-size: 11px; letter-spacing: .16em; text-transform: uppercase; font-weight: 700;
  color: var(--gold-deep); border: 1px solid rgba(201,162,75,0.40);
  border-radius: 999px; padding: 3px 12px; margin-bottom: 12px;
}
.sub-project h3 { font-size: clamp(18px, 1.8vw, 21px); margin-bottom: 10px; }
.sub-project > .lead { max-width: 68ch; }
.sub-project h4 { font-size: 16px; margin-bottom: 8px; }
.sub-body {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: var(--s-4); align-items: start; margin-top: 18px;
}
.sub-body .checklist { margin: 0; }
.sub-body p + p { margin-top: 10px; }
@media (max-width: 760px) {
  .sub-body { grid-template-columns: 1fr; }
  .sub-project { padding: var(--s-3); }
}

/* ---------- 培训课程块 ---------- */
.course-block {
  position: relative; margin-bottom: var(--s-4); padding: var(--s-5);
  background: var(--pearl); border: 1px solid var(--line); border-radius: var(--r-md);
}
.course-block:last-child { margin-bottom: 0; }
.course-no {
  font-family: var(--serif); font-size: clamp(30px, 3vw, 42px);
  font-weight: 700; line-height: 1; color: var(--gold);
}
.course-block h3 { margin: 10px 0 8px; }
.course-tagline { font-size: 15px; font-weight: 600; color: var(--text); }
.course-block > .lead { max-width: 76ch; margin-top: 14px; }
.course-block .checklist { margin-top: 18px; }
.course-block .checklist strong { color: var(--text); }
.course-sub { margin-top: 22px; font-size: 14px; font-weight: 700; letter-spacing: .04em; color: var(--ink); }
.course-block .grid { margin-top: 0; }
.course-block .card { background: var(--pearl-2); }
.course-block .card .checklist li { font-size: 13.8px; margin: 10px 0; }
.course-outcome {
  margin-top: 20px; padding: 14px 18px;
  background: var(--pearl-2); border-left: 3px solid var(--gold); border-radius: var(--r-sm);
  font-size: 14.5px; color: var(--text-muted);
}
.course-outcome b { color: var(--gold-deep); letter-spacing: .06em; }
@media (max-width: 760px) {
  .course-block { padding: var(--s-3); }
}

/* ---------- 页脚子项目 ---------- */
.footer-col .footer-sub {
  display: flex; align-items: center; flex-wrap: wrap;
  gap: 4px 8px;
  padding: 2px 0 6px 14px;
  font-size: 13px; color: var(--text-muted);
  line-height: 1.5;
}
.footer-col .footer-sub::before {
  content: ""; display: inline-block;
  width: 10px; height: 1px; background: var(--line-2);
  flex-shrink: 0;
}
.footer-col .footer-sub:hover { color: var(--gold-deep); }
/* ---------- noscript 降级内容（无 JS 环境与 AI 爬虫可见） ---------- */
.ns-nav {
  display: flex; flex-wrap: wrap; gap: 20px;
  width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 16px 32px;
  border-bottom: 1px solid var(--line);
  font-size: 14px;
}
.ns-nav a { color: var(--text); }
.ns-nav a:hover { color: var(--gold-deep); }
.ns-foot {
  width: 100%; max-width: var(--maxw); margin: var(--s-5) auto 0; padding: var(--s-4) 32px 0;
  border-top: 1px solid var(--line);
  font-size: 13.5px; color: var(--text-muted); line-height: 1.9;
}
.ns-foot .ns-brand { font-size: 15px; font-weight: 600; color: var(--ink); }
.ns-foot .ns-slogan { max-width: 64ch; margin-top: 6px; }
.ns-foot .ns-line { margin-top: 8px; }
.ns-foot .ns-line strong { color: var(--ink); margin-right: 6px; }
.ns-foot a { color: var(--text); border-bottom: 1px solid var(--line-2); }
.ns-foot a:hover { color: var(--gold-deep); }
.ns-foot .ns-qr { width: 22px; height: 22px; vertical-align: -7px; margin: 0 4px 0 2px; border-radius: 2px; }
.ns-foot .ns-copy { margin-top: 10px; font-size: 12.5px; color: var(--text-faint); }
@media (max-width: 760px) {
  .ns-nav { padding: 12px 20px; gap: 14px; }
  .ns-foot { padding: var(--s-3) 20px 0; }
}