/* =========================================================
   法智特集团 · 多页面网站  主样式
   配色: 大红 #C8102E / 浅灰 #F4F4F2 / 深黑 #1A1A1A
   字体: Inter / Noto Sans SC / 微软雅黑
   风格: 瑞士国际主义 (Swiss Style) · 极简克制
========================================================= */

/* ---------- 自托管 Black 字重（首屏大标题专用） ----------
   来源: HarmonyOS Sans SC Black（华为, 免费商用）
   已子集化为 GB2312 全字集 + ASCII, woff2 约 954KB, 载入不阻塞(font-display:swap)
   缺字时自动回退到下面的系统字体栈, 不会出现方框
   重新生成: python build_font_subset.py                              */
@font-face {
  font-family: 'HarmonyOS Sans SC Black';
  src: url('../fonts/HarmonyOS_Sans_SC_Black.woff2') format('woff2');
  font-weight: 900;
  font-style: normal;
  font-display: swap;
}

:root {
  --accent: #C8102E;          /* 品牌红 */
  --accent-dark: #A50D24;     /* 暗红 (hover) */
  --accent-soft: #F5E1E4;     /* 极浅红 (背景/标签) */
  --ink: #1A1A1A;             /* 主文字 */
  --ink-2: #4A4A4A;           /* 次文字 */
  --ink-3: #888888;           /* 辅助文字 */
  --grey-1: #F4F4F2;          /* 最浅灰 (卡片底) */
  --grey-2: #ECECEA;          /* 中浅灰 (分割) */
  --grey-3: #D5D5D0;          /* 中灰 (边框) */
  --paper: #FAFAF8;           /* 纸底 */
  --white: #FFFFFF;
  --gold: #C9A96E;            /* 金色点缀 (用于资质/公益) */

  --sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
  --sans-zh: 'Noto Sans SC', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', '微软雅黑', sans-serif;
  --mono: 'JetBrains Mono', 'Menlo', 'Consolas', monospace;
  /* 首屏大标题: 自托管真 Black(900) 字重; 字体未加载完时回退系统字体栈, 不闪空 */
  --sans-black: 'HarmonyOS Sans SC Black', 'Inter', -apple-system, BlinkMacSystemFont,
                'Helvetica Neue', Arial, 'Noto Sans SC', 'PingFang SC',
                'Hiragino Sans GB', 'Microsoft YaHei', '微软雅黑', sans-serif;

  /* 首页首屏「标题下横线」规格: 加粗加长版 */
  --hero-rule-w: 96px;        /* 长度: 原 48px × 2 */
  --hero-rule-h: 8px;         /* 粗细: 原 4px  × 2 */
  --hero-rule-gap: 40px;      /* 与标题的距离 */

  --max: 1320px;              /* 主内容最大宽度 */
  --pad: 6vw;                 /* 页面左右内边距 */
  --gap: 1.6vw;               /* 通用栅格间距 */
  --nav-h: 64px;              /* 导航栏高度 */
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--sans), var(--sans-zh);
  font-weight: 300;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; transition: color .15s; }
a:hover { color: var(--accent); }
img { display: block; max-width: 100%; height: auto; }

/* ========== 顶部导航栏 ========== */
.nav {
  position: fixed; top: 0; left: 0; right: 0;
  height: var(--nav-h);
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--grey-2);
  z-index: 100;
  display: flex; align-items: center;
}
.nav-inner {
  width: 100%; max-width: var(--max);
  margin: 0 auto; padding: 0 var(--pad);
  display: flex; align-items: center; justify-content: space-between;
}
.nav-logo {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--sans-zh); font-weight: 500;
  font-size: 18px; letter-spacing: .04em;
}
.nav-logo img { width: 36px; height: auto; }
.nav-logo span { color: var(--ink); }
.nav-menu { display: flex; align-items: center; gap: 32px; }
.nav-menu a {
  font-size: 14px; letter-spacing: .06em;
  color: var(--ink-2); padding: 4px 0;
  border-bottom: 1.5px solid transparent;
}
.nav-menu a:hover, .nav-menu a.active { color: var(--accent); border-bottom-color: var(--accent); }
.nav-toggle { display: none; background: none; border: none; cursor: pointer; }
@media (max-width: 768px) {
  .nav-menu { display: none; position: absolute; top: var(--nav-h); left: 0; right: 0; background: #fff; flex-direction: column; padding: 16px 0; border-bottom: 1px solid var(--grey-2); }
  .nav-menu.open { display: flex; }
  .nav-menu a { padding: 10px var(--pad); border-bottom: 1px solid var(--grey-2); width: 100%; }
  .nav-toggle { display: block; padding: 6px 10px; font-size: 22px; color: var(--ink); }
}

/* ========== 通用容器 ========== */
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 var(--pad); }
.section { padding: 96px 0; }
.section-tight { padding: 64px 0; }
.section-grey { background: var(--grey-1); }
.section-white { background: #fff; }

/* ========== 通用版式 ========== */
.eyebrow {
  font-family: var(--mono); font-size: 12px; letter-spacing: .2em;
  color: var(--ink-3); text-transform: uppercase; margin-bottom: 12px;
}
.eyebrow.accent { color: var(--accent); }
.h1 {
  font-family: var(--sans), var(--sans-zh);
  font-weight: 700;
  font-size: clamp(36px, 5vw, 68px);
  line-height: 1.1; letter-spacing: .02em; color: var(--ink);
}
.h2 {
  font-family: var(--sans), var(--sans-zh);
  font-weight: 700;
  font-size: clamp(28px, 3.4vw, 48px);
  line-height: 1.15; letter-spacing: .02em; color: var(--ink);
}
.h3 {
  font-family: var(--sans-zh); font-weight: 500;
  font-size: clamp(18px, 1.4vw, 24px); line-height: 1.3; color: var(--ink);
}
.lede {
  font-size: clamp(16px, 1.2vw, 19px);
  line-height: 1.85; color: var(--ink-2);
  max-width: 720px;
}
.body-text { font-size: 17px; line-height: 1.85; color: var(--ink-2); }
.muted { color: var(--ink-3); }

/* ========== 按钮 ========== */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 22px; font-size: 14px; letter-spacing: .06em;
  background: var(--accent); color: #fff; border: none; cursor: pointer;
  transition: background .15s, transform .15s;
  font-family: var(--sans), var(--sans-zh); font-weight: 400;
}
.btn:hover { background: var(--accent-dark); color: #fff; transform: translateY(-1px); }
.btn-outline {
  background: transparent; color: var(--ink); border: 1px solid var(--ink);
}
.btn-outline:hover { background: var(--ink); color: #fff; }
.btn-ghost {
  background: transparent; color: var(--accent); border: 1px solid var(--accent);
}
.btn-ghost:hover { background: var(--accent); color: #fff; }
.btn-sm { padding: 6px 14px; font-size: 12px; }

/* ========== 卡片 ========== */
.card {
  background: #fff; padding: 28px; border: 1px solid var(--grey-2);
  transition: border-color .15s, transform .15s;
}
.card:hover { border-color: var(--accent); transform: translateY(-2px); }
.card-tight { padding: 20px; }
.card-fill {
  background: var(--grey-1); padding: 24px; border: 1px solid var(--grey-2);
}
.card-accent { background: var(--accent); color: #fff; padding: 28px; }
/* 董事长介绍:右侧 4 张卡片等高拉伸,内容垂直居中,与左侧照片顶/底边对齐 */
#chairman .card-fill { display: flex; flex-direction: column; justify-content: center; }

/* ========== 标签 / Chip ========== */
.chip {
  display: inline-block;
  padding: 4px 12px;
  font-size: 12px; letter-spacing: .04em;
  background: var(--grey-1); color: var(--ink-2);
  border: 1px solid var(--grey-2);
  margin-right: 6px; margin-bottom: 6px;
}
.chip-accent { background: var(--accent-soft); color: var(--accent); border-color: var(--accent-soft); }

/* ========== 网格 ========== */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
@media (max-width: 900px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}
@media (min-width: 901px) and (max-width: 1200px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

/* ========== 顶部分割大标题 ========== */
.page-hero {
  padding: calc(var(--nav-h) + 64px) 0 48px;
  background: var(--paper);
  border-bottom: 1px solid var(--grey-2);
}
.page-hero-inner { max-width: var(--max); margin: 0 auto; padding: 0 var(--pad); }

/* ========== Page Hero · 通栏底图+模糊变体 ========== */
.page-hero--bg {
  position: relative;
  padding: calc(var(--nav-h) + 96px) 0 88px;
  background: var(--ink);
  color: #fff;
  border-bottom: 1px solid rgba(255,255,255,.08);
  overflow: hidden;
  isolation: isolate;
}
.page-hero--bg .page-hero-bg {
  position: absolute;
  inset: -4%;
  z-index: -1;
  background-size: cover;
  background-position: center;
  filter: blur(14px) brightness(0.45) saturate(1.1);
  transform: scale(1.1);
}
.page-hero--bg::after {
  content: '';
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(180deg, rgba(0,0,0,.25) 0%, rgba(0,0,0,.15) 60%, rgba(0,0,0,.45) 100%);
  pointer-events: none;
}
.page-hero--bg .eyebrow.accent { color: #fff; opacity: .85; }
.page-hero--bg .divider-thick { background: #fff; }
.page-hero--bg h1 { color: #fff; }
.page-hero--bg .lede { color: rgba(255,255,255,.85); }
.page-hero--bg .page-hero-inner { position: relative; z-index: 1; }

/* ========== Footer ========== */
.footer {
  background: var(--ink); color: #fff;
  padding: 64px 0 32px;
  margin-top: 64px;
}
.footer-grid {
  max-width: var(--max); margin: 0 auto; padding: 0 var(--pad);
  display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr 1.15fr; gap: 40px;
}
.footer-addr { font-size: 13.5px; line-height: 1.8; color: rgba(255,255,255,.65); margin-top: 8px; }
.copy-beian a { color: rgba(255,255,255,.55); border-bottom: 1px solid rgba(255,255,255,.2); }
.copy-beian a:hover { color: #fff; border-bottom-color: #fff; }

/* ========== 集团旗下企业互链(子页面底部) ========== */
.sib-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.sib-grid > a {
  display: flex; flex-direction: column; gap: 6px;
  padding: 20px 22px; background: #fff; border: 1px solid var(--grey-2);
  transition: all .18s;
}
.sib-grid > a:hover {
  border-color: var(--accent); transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(200,16,46,.08);
}
.sib-cn { font-family: var(--sans-zh); font-size: 15px; font-weight: 500; color: var(--ink); transition: color .18s; }
.sib-en { font-family: var(--mono); font-size: 11px; letter-spacing: .16em; color: var(--ink-3); }
.sib-grid > a:hover .sib-cn { color: var(--accent); }
/* 当前页:红底高亮且不可点 */
.sib-grid > a.sib-cur { background: var(--accent); border-color: var(--accent); pointer-events: none; }
.sib-grid > a.sib-cur .sib-cn { color: #fff; }
.sib-grid > a.sib-cur .sib-en { color: rgba(255,255,255,.75); }
@media (max-width: 880px) { .sib-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .sib-grid { grid-template-columns: 1fr; } }

/* 面包屑导航(子页面内链) */
.breadcrumb {
  display: flex; align-items: center; flex-wrap: wrap; gap: 8px;
  font-family: var(--mono); font-size: 12px; letter-spacing: .08em;
  color: rgba(255,255,255,.5); margin-bottom: 20px;
}
.breadcrumb a { color: rgba(255,255,255,.7); }
.breadcrumb a:hover { color: #fff; }
.breadcrumb span { color: rgba(255,255,255,.28); }
.breadcrumb em { font-style: normal; color: #fff; }
.footer h4 {
  font-family: var(--sans-zh); font-size: 13px; font-weight: 500;
  letter-spacing: .12em; color: rgba(255,255,255,.5);
  text-transform: uppercase; margin-bottom: 16px;
}
.footer a { display: block; padding: 4px 0; color: rgba(255,255,255,.75); font-size: 14px; }
.footer a:hover { color: #fff; }
.footer .copy {
  max-width: var(--max); margin: 48px auto 0; padding: 24px var(--pad) 0;
  border-top: 1px solid rgba(255,255,255,.1);
  display: flex; justify-content: center; align-items: center;
  flex-wrap: wrap; gap: 10px 24px; text-align: center;
  font-size: 12px; color: rgba(255,255,255,.4); letter-spacing: .06em;
}
@media (max-width: 1100px) {
  .footer-grid { grid-template-columns: 1fr 1fr 1fr; gap: 32px; }
}
@media (max-width: 900px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer .copy { flex-direction: column; gap: 10px; }
}

/* ========== Banner Hero (单页用,保留作后备) ========== */
.hero {
  height: 100vh; min-height: 600px;
  background: var(--accent); color: #fff;
  display: flex; flex-direction: column; justify-content: space-between;
  padding: 32px var(--pad) 64px;
  position: relative; overflow: hidden;
}
.hero-top { display: flex; justify-content: space-between; align-items: center; }
.hero-top img.logo { width: 80px; height: auto; }
.hero-top .year { font-family: var(--mono); font-size: 13px; letter-spacing: .2em; color: rgba(255,255,255,.7); }
.hero-middle .kicker {
  font-family: var(--mono); font-size: 12px; letter-spacing: .32em;
  color: rgba(255,255,255,.7); margin-bottom: 24px;
}
.hero-middle h1 {
  font-family: var(--sans-black);
  font-weight: 900; font-size: clamp(56px, 8vw, 128px);
  line-height: 1; letter-spacing: .02em; color: #fff; margin: 0;
}
.hero-bottom { display: flex; flex-direction: column; gap: 4px; }
.hero-bottom .cn { font-size: clamp(18px, 1.6vw, 22px); letter-spacing: .2em; }
.hero-bottom .en { font-family: var(--mono); font-size: 11px; letter-spacing: .18em; color: rgba(255,255,255,.6); }
.hero-bottom .tag { font-size: 14px; color: rgba(255,255,255,.85); margin-top: 8px; }
.hero-scroll {
  position: absolute; bottom: 24px; left: 50%; transform: translateX(-50%);
  font-family: var(--mono); font-size: 11px; letter-spacing: .2em;
  color: rgba(255,255,255,.6); text-align: center;
  z-index: 12;
}
.hero-scroll::after { content: ''; display: block; width: 1px; height: 32px; margin: 8px auto 0; background: rgba(255,255,255,.4); animation: scroll-hint 1.5s ease-in-out infinite; }
@keyframes scroll-hint { 0%, 100% { transform: scaleY(0.5); } 50% { transform: scaleY(1); } }

/* ========== 首页 Hero 轮播 ========== */
.hero-slider {
  position: relative;
  height: 100vh;
  min-height: 600px;
  color: #fff;
  overflow: hidden;
  background: var(--accent);
}
.hero-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 1s ease;
  pointer-events: none;
  display: flex;
  flex-direction: column;
  padding: 32px var(--pad) 80px;
}
.hero-slide.active {
  opacity: 1;
  pointer-events: auto;
  z-index: 1;
}
/* 3P-5P 顶部第一行是英文小标签, 原 32px 内边距会让它被 fixed 导航(64px)整行压住 → 让出导航高度 */
.hero-slide[data-i="2"],
.hero-slide[data-i="3"],
.hero-slide[data-i="4"] { padding-top: calc(var(--nav-h) + 36px); }
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  background-size: cover;
  background-position: center;
}
/* 第1P · 上海陆家嘴天际线(index01)模糊放大做底 */
.hero-slide[data-i="0"] .hero-bg {
  background-image: url('../images/index01.jpg');
  filter: blur(6px) brightness(0.5);
  transform: scale(1.12);
}
/* 第3-5P · 业务图(JS 写入) */
.hero-slide[data-i="2"] .hero-bg,
.hero-slide[data-i="3"] .hero-bg,
.hero-slide[data-i="4"] .hero-bg {
  filter: brightness(0.5);
}
/* 第1P 模糊降低后,遮罩略加厚,保证白字可读 */
.hero-slide[data-i="0"] .hero-overlay {
  background: linear-gradient(180deg, rgba(0,0,0,.45) 0%, rgba(0,0,0,.25) 50%, rgba(0,0,0,.6) 100%);
}
/* 第2P · 纯红底 */
.hero-bg-red {
  background: #C8102E;
}
/* 渐变暗遮罩(增强文字可读) */
.hero-overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(180deg, rgba(0,0,0,.35) 0%, rgba(0,0,0,.1) 50%, rgba(0,0,0,.55) 100%);
}
.hero-slide[data-i="1"] .hero-overlay { display: none; }

.hero-content {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  flex: 1;
  justify-content: space-between;
}
.hero-content-center {
  justify-content: center;
  align-items: center;
  text-align: center;
}

/* 第1P 沿用原 hero 元素样式 */
.hero-slide[data-i="0"] .hero-top {
  display: flex; justify-content: space-between; align-items: center;
}
.hero-slide[data-i="0"] .hero-top img.logo { width: 80px; height: auto; }
.hero-slide[data-i="0"] .hero-top .year {
  font-family: var(--mono); font-size: 13px; letter-spacing: .2em;
  color: rgba(255,255,255,.75);
}
.hero-slide[data-i="0"] .kicker {
  font-family: var(--mono); font-size: 12px; letter-spacing: .32em;
  color: rgba(255,255,255,.7); margin-bottom: 24px;
}
.hero-slide[data-i="0"] h1 {
  font-family: var(--sans), var(--sans-zh);
  font-weight: 200; font-size: clamp(56px, 8vw, 128px);
  line-height: 1; letter-spacing: .04em; color: #fff; margin: 0;
}
.hero-slide[data-i="0"] .tag {
  font-size: 14px; color: rgba(255,255,255,.85); margin-top: 8px;
}

/* 业务 3P-5P 文字样式 */
.hero-eyebrow {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .32em;
  color: rgba(255,255,255,.75);
  margin-bottom: 20px;
}
.hero-h2 {
  /* 与首屏 h1 统一: 真 Black(900) 字重; 重字重大字号需略收紧字距 */
  font-family: var(--sans-black);
  font-weight: 900;
  font-size: clamp(40px, 5.5vw, 80px);
  /* 行高与 2P 的 .hero-values 一致(1.3): 同样的 margin 才能得到同样的视觉空白 */
  line-height: 1.3;
  letter-spacing: .02em;
  /* 中文↔英文间距: 与 2P 的 .hero-values 保持一致(28px) */
  margin: 0 0 28px;
  color: #fff;
}
/* 业务页(3P-5P)中文大标题下的对应英文小标题, 与 1P kicker / 2P hero-values-en 同一形式 */
.hero-h2-en {
  font-family: var(--mono);
  font-size: clamp(11px, 1vw, 13px);
  letter-spacing: .26em;
  line-height: 1.5;
  color: rgba(255,255,255,.78);
  margin: 0 0 28px;
}

/* 3P-5P 中文标题 + 英文小标题包成一个整体:
   父级 .hero-content 是 space-between 的 flex 容器, 若两者各为独立 flex 项,
   中间会被均摊出一大段空白 —— 与 2P(居中紧凑) 观感不一致。
   包起来后 中文↔英文 = .hero-h2 的 margin-bottom(28px), 与 2P 完全一致。 */
.hero-titleblock { display: flex; flex-direction: column; }
.hero-lede {
  font-family: var(--sans-zh);
  font-size: clamp(15px, 1.3vw, 17px);
  line-height: 1.85;
  color: rgba(255,255,255,.88);
  max-width: 580px;
  margin: 0 0 32px;
}
.hero-btn {
  display: inline-block;
  padding: 14px 28px;
  background: #fff;
  color: var(--accent);
  font-family: var(--sans-zh);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: .04em;
  text-decoration: none;
  transition: all .25s;
  align-self: flex-start;
  border: 1px solid #fff;
}
.hero-btn:hover {
  background: transparent;
  color: #fff;
}

/* 第2P 价值观大字报 */
.hero-values {
  font-family: var(--sans-zh);
  font-weight: 700;
  font-size: clamp(44px, 6.8vw, 96px);
  color: #fff;
  letter-spacing: .14em;
  line-height: 1.3;
  margin-bottom: 28px;
}
.hero-values span {
  color: rgba(255,255,255,.45);
  font-weight: 200;
  margin: 0 8px;
}
.hero-values-en {
  font-family: var(--mono);
  font-size: clamp(12px, 1.1vw, 15px);
  letter-spacing: .26em;
  color: rgba(255,255,255,.78);
}

/* 轮播标题下的横线（加粗加长: 8px 粗 × 96px 长 主色红） */
.hero-middle h1::after,
.hero-h2-en::after {
  content: '';
  display: block;
  width: var(--hero-rule-w);
  height: var(--hero-rule-h);
  margin-top: var(--hero-rule-gap);
  background: var(--accent);
  transition: width .8s cubic-bezier(.22,.61,.36,1) .15s;
}
/* 3P-5P 红线位置与 2P 统一: 一律用 --hero-rule-gap(40px), 不再单独覆写 */
/* 2P 纯红底:红线不可见,改白色并居中 */
.hero-slide[data-i="1"] .hero-values-en::after {
  content: '';
  display: block;
  width: var(--hero-rule-w);
  height: var(--hero-rule-h);
  margin: var(--hero-rule-gap) auto 0;
  background: #fff;
  transition: width .8s cubic-bezier(.22,.61,.36,1) .15s;
}
/* 切到该页时横线从 0 展开 */
.hero-slide:not(.active) .hero-middle h1::after,
.hero-slide:not(.active) .hero-h2-en::after,
.hero-slide:not(.active) .hero-values-en::after { width: 0; }

/* 轮播左右箭头 */
.hs-prev, .hs-next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 10;
  background: rgba(255,255,255,.10);
  color: #fff;
  border: 1px solid rgba(255,255,255,.28);
  width: 48px;
  height: 48px;
  font-size: 28px;
  line-height: 1;
  cursor: pointer;
  transition: all .2s;
  font-family: var(--sans);
  padding: 0;
}
.hs-prev:hover, .hs-next:hover {
  background: rgba(255,255,255,.22);
  border-color: rgba(255,255,255,.6);
}
.hs-prev { left: 24px; }
.hs-next { right: 24px; }

/* 圆点指示器 */
.hs-dots {
  position: absolute;
  bottom: 96px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
  display: flex;
  gap: 10px;
}
.hs-dots span {
  width: 24px;
  height: 3px;
  background: rgba(255,255,255,.35);
  cursor: pointer;
  transition: all .25s;
  display: block;
}
.hs-dots span.active {
  background: #fff;
  width: 36px;
}

@media (max-width: 700px) {
  .hs-prev, .hs-next { display: none; }
  .hs-dots { bottom: 72px; }
  .hero-values { letter-spacing: .06em; }
  .hero-values span { margin: 0 4px; }
  .hero-lede { max-width: 100%; }
  /* 小屏纵向空间紧: 横线与间距同比缩小, 保证 5 屏内容不溢出 */
  :root { --hero-rule-w: 72px; --hero-rule-h: 6px; --hero-rule-gap: 26px; }
  /* 中文大标题在 390px 宽下会被溢出裁掉(如「航空产业 · 布局低空」), 缩到能整行放下
     间距不在此覆写: 沿用 28px, 与 2P 的 .hero-values 保持一致 */
  .hero-h2 { font-size: clamp(26px, 7.2vw, 44px); letter-spacing: .02em; }
  .hero-h2-en { font-size: 10px; letter-spacing: .16em; margin-bottom: 20px; }
}

/* ========== 三大板块卡片(首页用) ========== */
.segment-card {
  position: relative; padding: 40px 32px;
  background: #fff; border: 1px solid var(--grey-2);
  transition: all .25s; cursor: pointer; overflow: hidden;
  display: flex; flex-direction: column; min-height: 280px;
}
.segment-card:hover { border-color: var(--accent); transform: translateY(-4px); box-shadow: 0 8px 24px rgba(0,0,0,.06); }
.segment-card .num { font-family: var(--sans); font-weight: 700; font-size: 48px; line-height: 1; color: var(--accent); margin-bottom: 16px; }
.segment-card h3 { font-family: var(--sans-zh); font-weight: 500; font-size: 22px; margin-bottom: 12px; }
.segment-card .desc { font-size: 15px; color: var(--ink-2); line-height: 1.75; flex: 1; }
.segment-card .arrow { margin-top: 24px; font-size: 13px; color: var(--accent); letter-spacing: .04em; }

/* ========== 时间轴 ========== */
.timeline { position: relative; padding-left: 100px; }
.timeline::before { content: ''; position: absolute; left: 80px; top: 0; bottom: 0; width: 1px; background: var(--grey-3); }
.timeline-row {
  position: relative; padding: 24px 0;
  display: grid; grid-template-columns: 60px 1fr; gap: 32px;
  align-items: baseline;
}
.timeline-row::before {
  content: ''; position: absolute; left: -27px; top: 32px;
  width: 11px; height: 11px; border-radius: 50%;
  background: #fff; border: 2px solid var(--accent);
}
.timeline-year {
  font-family: var(--sans); font-weight: 300;
  font-size: 32px; color: var(--accent); letter-spacing: .02em;
}
.timeline-desc { font-size: 16px; color: var(--ink-2); line-height: 1.8; }
@media (max-width: 700px) {
  .timeline { padding-left: 0; }
  .timeline::before { display: none; }
  .timeline-row { grid-template-columns: 1fr; gap: 4px; padding: 16px 0; }
  .timeline-row::before { display: none; }
  .timeline-year { font-size: 22px; }
}

/* ========== 价值观 4 卡片(PPT 2红2灰交替) ========== */
.value-card {
  padding: 36px 28px; min-height: 280px;
  display: flex; flex-direction: column; gap: 14px;
  transition: transform .25s;
}
.value-card:hover { transform: translateY(-4px); }
.value-card .ic { width: 36px; height: 36px; }
.value-card .cn { font-family: var(--sans-zh); font-weight: 500; font-size: 28px; letter-spacing: .12em; line-height: 1.1; }
.value-card .en { font-family: var(--mono); font-size: 11px; letter-spacing: .22em; }
.value-card p { font-size: 13.5px; line-height: 1.75; margin-top: 4px; }

/* 奇数卡:浅灰底 + 深色文字 */
.value-card:nth-child(odd)  { background: #F0EFEC; color: var(--ink); }
.value-card:nth-child(odd)  .en { color: var(--accent); }
.value-card:nth-child(odd)  p { color: var(--ink-2); }

/* 偶数卡:红色底 + 白字 */
.value-card:nth-child(even) { background: var(--accent); color: #fff; }
.value-card:nth-child(even) .ic { filter: brightness(0) invert(1); }
.value-card:nth-child(even) .en { color: rgba(255,255,255,.82); }
.value-card:nth-child(even) .cn,
.value-card:nth-child(even) p { color: #fff; }
.value-card:nth-child(even) p { opacity: .92; }

@media (max-width: 880px) {
  .value-card { min-height: 200px; padding: 28px 22px; }
  .value-card .cn { font-size: 24px; }
}

/* ========== 公司卡片(业务板块) ========== */
.co-card {
  background: #fff; border: 1px solid var(--grey-2);
  display: flex; flex-direction: column;
  transition: all .2s; overflow: hidden;
}
.co-card:hover { border-color: var(--accent); }
.co-card-img { width: 100%; height: 180px; overflow: hidden; background: var(--grey-1); }
.co-card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .35s; }
.co-card:hover .co-card-img img { transform: scale(1.05); }
.co-card-body { padding: 24px; flex: 1; display: flex; flex-direction: column; gap: 12px; }
.co-card-tag { font-family: var(--mono); font-size: 11px; letter-spacing: .2em; color: var(--accent); }
.co-card h3 { font-family: var(--sans-zh); font-weight: 500; font-size: 18px; }
.co-card p { font-size: 13px; color: var(--ink-2); line-height: 1.7; flex: 1; }
.co-card-foot { display: flex; gap: 8px; padding-top: 12px; border-top: 1px solid var(--grey-2); }
.co-card-foot .btn { flex: 1; justify-content: center; padding: 8px 12px; font-size: 12px; }

/* ========== 灯箱 Lightbox ========== */
.lb-mask {
  position: fixed; inset: 0;
  background: rgba(0, 0, 0, .92);
  z-index: 200; display: none;
  align-items: center; justify-content: center;
  padding: 60px 20px;
}
.lb-mask.open { display: flex; }
.lb-stage {
  position: relative; max-width: 1100px; width: 100%;
  display: flex; align-items: center; justify-content: center;
  height: calc(100vh - 120px);
}
.lb-img {
  max-width: 100%; max-height: 100%;
  object-fit: contain;
  background: #fff; padding: 8px;
}
.lb-img-stack { position: relative; width: 100%; height: 100%; display: flex; align-items: center; justify-content: center; }
.lb-img-stack > img { position: absolute; max-width: 90%; max-height: 90%; object-fit: contain; background: #fff; padding: 8px; opacity: 0; transition: opacity .25s; }
.lb-img-stack > img.active { opacity: 1; }
.lb-caption {
  position: absolute; bottom: -36px; left: 0; right: 0;
  text-align: center; color: rgba(255,255,255,.85);
  font-family: var(--sans-zh); font-size: 14px; letter-spacing: .06em;
}
.lb-cap-num {
  margin-left: 10px; font-family: var(--mono); font-size: 12px;
  letter-spacing: .1em; color: rgba(255,255,255,.55);
}
.lb-btn {
  position: absolute; top: 50%; transform: translateY(-50%);
  background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.2);
  color: #fff; width: 48px; height: 48px; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  font-size: 24px; transition: background .15s;
}
.lb-btn:hover { background: rgba(255,255,255,.24); }
.lb-prev { left: -8px; } .lb-next { right: -8px; }
.lb-close {
  position: absolute; top: -48px; right: 0;
  background: transparent; border: none; color: #fff;
  font-size: 28px; cursor: pointer; padding: 8px;
}
.lb-dots {
  position: absolute; bottom: -68px; left: 0; right: 0;
  display: flex; gap: 6px; justify-content: center;
}
.lb-dots span {
  width: 8px; height: 8px; border-radius: 50%;
  background: rgba(255,255,255,.3); cursor: pointer;
  transition: background .15s, transform .15s;
}
.lb-dots span.active { background: #fff; transform: scale(1.3); }

/* ========== 灯箱网格(证书预览 4x3) ========== */
.cert-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px;
}
@media (max-width: 900px) { .cert-grid { grid-template-columns: repeat(2, 1fr); } }
.cert-cell {
  background: #fff; border: 1px solid var(--grey-2);
  cursor: pointer; transition: all .15s;
  display: flex; flex-direction: column;
}
.cert-cell:hover { border-color: var(--accent); transform: translateY(-2px); }
.cert-cell-img { width: 100%; aspect-ratio: 3/4; overflow: hidden; background: var(--grey-1); display: flex; align-items: center; justify-content: center; }
.cert-cell-img img { max-width: 100%; max-height: 100%; object-fit: contain; padding: 6px; }
.cert-cell-cap { padding: 12px 14px; border-top: 1px solid var(--grey-2); }
.cert-cell-cap .t { font-family: var(--sans-zh); font-weight: 500; font-size: 13px; color: var(--ink); margin-bottom: 2px; }
.cert-cell-cap .s { font-family: var(--mono); font-size: 11px; color: var(--ink-3); letter-spacing: .06em; }

/* Logo 封面（公益捐赠卡片） */
.cert-cell-logo {
  width: 100%;
  aspect-ratio: 4/3;
  background: #fff;
  display: flex; align-items: center; justify-content: center;
  padding: 22px 18px;
  border-bottom: 1px solid var(--grey-2);
  position: relative;
  overflow: hidden;
}
.cert-cell-logo::before {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(135deg, var(--paper) 0%, #fff 50%, var(--paper) 100%);
  z-index: 0;
}
.cert-cell-logo img {
  max-width: 78%;
  max-height: 78%;
  object-fit: contain;
  position: relative; z-index: 1;
  transition: transform .35s ease;
  filter: drop-shadow(0 1px 2px rgba(0,0,0,.05));
}
.cert-cell:hover .cert-cell-logo img { transform: scale(1.06); }
.cert-cell--empty .cert-cell-logo { opacity: .55; }
.cert-cell--empty .cert-cell-cap .s { color: var(--ink-3); font-style: italic; }

/* ========== 主图卡片 (公益) ========== */
.hero2 { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
@media (max-width: 700px) { .hero2 { grid-template-columns: 1fr; } }
.hero2-card { position: relative; aspect-ratio: 16/10; overflow: hidden; cursor: pointer; }
.hero2-card img { width: 100%; height: 100%; object-fit: cover; transition: transform .35s; }
.hero2-card:hover img { transform: scale(1.05); }
.hero2-cap {
  position: absolute; bottom: 0; left: 0; right: 0;
  background: linear-gradient(to top, rgba(0,0,0,.8), transparent);
  color: #fff; padding: 24px 20px 16px;
}
.hero2-cap h4 { font-family: var(--sans-zh); font-size: 16px; font-weight: 500; margin-bottom: 4px; }
.hero2-cap p { font-size: 12px; opacity: .8; }

/* ========== 轮播 Carousel ========== */
.carousel { position: relative; max-width: 900px; margin: 0 auto; }
.carousel-stage { position: relative; aspect-ratio: 16/10; overflow: hidden; background: var(--grey-1); }
.carousel-stage > img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: contain; opacity: 0; transition: opacity .3s; }
.carousel-stage > img.active { opacity: 1; }
.carousel-cap { text-align: center; padding: 14px; font-family: var(--sans-zh); font-size: 14px; color: var(--ink-2); }
.carousel-nav {
  position: absolute; top: 50%; transform: translateY(-50%);
  background: rgba(255,255,255,.9); border: 1px solid var(--grey-3);
  width: 40px; height: 40px; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  font-size: 18px; color: var(--ink); transition: all .15s;
}
.carousel-nav:hover { background: var(--accent); color: #fff; border-color: var(--accent); }
.carousel-prev { left: 8px; } .carousel-next { right: 8px; }
.carousel-dots { display: flex; gap: 6px; justify-content: center; margin-top: 12px; }
.carousel-dots span { width: 6px; height: 6px; border-radius: 50%; background: var(--grey-3); cursor: pointer; }
.carousel-dots span.active { background: var(--accent); width: 24px; border-radius: 3px; }

/* ========== 行业交流图(photo grid) ========== */
.photo-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
@media (max-width: 900px) { .photo-grid { grid-template-columns: repeat(2, 1fr); } }
.photo-grid > div { aspect-ratio: 4/3; overflow: hidden; background: var(--grey-1); cursor: pointer; }
.photo-grid > div img { width: 100%; height: 100%; object-fit: cover; transition: transform .35s; }
.photo-grid > div:hover img { transform: scale(1.05); }

/* ========== 标签页(Tabs) ========== */
.tabs {
  display: flex; gap: 0; border-bottom: 1px solid var(--grey-3);
  margin-bottom: 40px; overflow-x: auto;
}
.tab {
  padding: 14px 24px; font-family: var(--sans-zh); font-size: 15px; font-weight: 400;
  color: var(--ink-3); cursor: pointer; border-bottom: 2px solid transparent;
  margin-bottom: -1px; transition: all .15s; white-space: nowrap;
}
.tab:hover { color: var(--ink); }
.tab.active { color: var(--accent); border-bottom-color: var(--accent); }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ========== 新闻卡片 ========== */
.news-list { display: flex; flex-direction: column; gap: 0; }
.news-item {
  display: grid; grid-template-columns: 140px 1fr 200px 24px;
  gap: 32px; padding: 32px 0;
  border-bottom: 1px solid var(--grey-2);
  align-items: center; transition: background .15s;
  cursor: pointer;
}
.news-item:hover { background: var(--grey-1); padding: 32px 16px; }
.news-date { font-family: var(--mono); font-size: 13px; color: var(--ink-3); letter-spacing: .04em; }
.news-body h3 { font-family: var(--sans-zh); font-weight: 500; font-size: 18px; margin-bottom: 8px; line-height: 1.4; }
.news-body p { font-size: 15px; color: var(--ink-2); line-height: 1.75; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.news-tag { text-align: right; }
.news-tag .chip { font-size: 11px; }
.news-arrow { color: var(--ink-3); font-size: 20px; text-align: right; }
@media (max-width: 700px) {
  .news-item { grid-template-columns: 1fr; gap: 8px; padding: 24px 0; }
  .news-tag, .news-arrow { text-align: left; }
}

/* ========== 数据大字报 ========== */
.kpi { display: flex; align-items: baseline; gap: 8px; }
.kpi-num { font-family: var(--sans); font-weight: 700; font-size: clamp(40px, 5vw, 72px); line-height: 1; color: var(--accent); letter-spacing: -.02em; }
/* KPI 数字里的中文单位与符号（亿/万/城/个/+ 等）：统一缩放到 .42em 且同为 700，保证数字、汉字、符号的字号与粗细一致 */
.kpi-num .num-cn { font-family: var(--sans-zh); font-size: .42em; font-weight: 700; }
.kpi-unit { font-size: 28px; font-weight: 700; color: var(--accent); font-family: var(--sans-zh); }

/* ========== 占位块 ========== */
.placeholder {
  background: var(--grey-1); border: 2px dashed var(--grey-3);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  color: var(--ink-3); font-family: var(--sans-zh); font-size: 13px;
  min-height: 160px; padding: 20px; text-align: center; gap: 4px;
}
.placeholder .ic { font-size: 24px; opacity: .4; }
.placeholder .note { font-family: var(--mono); font-size: 11px; letter-spacing: .04em; opacity: .6; }

/* ========== 工具：滚动显示动画 ========== */
.fade-in { opacity: 0; transform: translateY(20px); transition: opacity .6s, transform .6s; }
.fade-in.show { opacity: 1; transform: translateY(0); }

/* ========== 工具：分隔条 ========== */
.divider { height: 1px; background: var(--grey-2); margin: 32px 0; }
.divider-thick { height: 4px; background: var(--accent); width: 48px; margin: 0 0 24px; }

/* ========== 软著书架（3D 侧立 · 悬停转正）========== */
.soft-shelf {
  display: flex;
  gap: 5px;
  height: 380px;
  padding: 30px 4px 12px;
  perspective: 1700px;
  perspective-origin: 50% 42%;
  overflow: hidden;
  border: 1px solid var(--grey-2);
  background: linear-gradient(to bottom, #FAFAFA, #F0F0F0);
}
.shelf-item {
  position: relative;
  flex: 1 1 38px;
  min-width: 34px;
  height: 100%;
  cursor: pointer;
  background: #fff;
  border: 1px solid var(--grey-2);
  box-shadow: 3px 8px 18px rgba(0,0,0,.12);
  overflow: hidden;
  transform: rotateY(-34deg);
  transform-origin: center left;
  transition: flex-basis .5s cubic-bezier(.22,.9,.25,1),
              transform .5s cubic-bezier(.22,.9,.25,1),
              box-shadow .4s ease;
}
/* 悬停：抽出转正，占据 9 份宽度，其余自动压缩 */
.shelf-item:hover {
  flex: 9 1 300px;
  transform: rotateY(0deg) translateY(-6px);
  z-index: 20;
  box-shadow: 0 16px 44px rgba(0,0,0,.30);
}
.shelf-item img {
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: left center;
  display: block;
  background: #fff;
  transition: object-fit .35s ease;
}
.shelf-item:hover img { object-fit: contain; }
/* 书脊：默认覆盖，竖排编号 */
.shelf-spine {
  position: absolute; inset: 0;
  display: flex; align-items: flex-start; justify-content: center;
  padding-top: 14px;
  background: linear-gradient(to right, rgba(255,255,255,.92) 0%, rgba(240,240,240,.94) 55%, rgba(214,214,214,.96) 100%);
  transition: opacity .35s ease;
}
.shelf-spine::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 26px;
  background: var(--accent); opacity: .85;
}
.shelf-spine span {
  writing-mode: vertical-rl;
  font-family: var(--mono); font-size: 11px; letter-spacing: .22em;
  color: var(--ink-2); margin-top: 38px;
}
.shelf-item:hover .shelf-spine { opacity: 0; }
/* 悬停标题条 */
.shelf-cap {
  position: absolute; left: 0; right: 0; bottom: 0;
  padding: 12px 14px;
  background: linear-gradient(to top, rgba(0,0,0,.86), transparent);
  color: #fff; font-size: 12px; letter-spacing: .04em;
  opacity: 0; transform: translateY(6px);
  transition: opacity .35s ease, transform .35s ease;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.shelf-item:hover .shelf-cap { opacity: 1; transform: translateY(0); }
/* 非悬停项轻微压暗，突出当前 */
.soft-shelf:hover .shelf-item:not(:hover) { filter: brightness(.94); }

/* ========== 移动端基础适配 ========== */
@media (max-width: 700px) {
  :root { --pad: 5vw; }
  .section { padding: 64px 0; }
  .h1 { font-size: 40px; }
  .h2 { font-size: 30px; }
  .cert-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .soft-shelf { height: 280px; gap: 3px; }
  .shelf-item:hover { flex: 6 1 220px; }
}