/* ============================================================
   知航科技服务 · 汇和信专利代理 — 全站样式
   设计调性：专业 · 可信 · 价值（深蓝 + 金）
   ============================================================ */

:root {
  --ink: #14273e;
  --ink-soft: #45566b;
  --primary: #0e3a5d;
  --primary-light: #1b5b8a;
  --accent: #c9a227;
  --accent-soft: #f6ecd2;
  --bg: #ffffff;
  --bg-soft: #f4f7fa;
  --bg-deep: #0b2a44;
  --line: #e3e9f0;
  --radius: 12px;
  --shadow: 0 10px 30px rgba(14, 58, 93, .08);
  --shadow-lg: 0 20px 50px rgba(14, 58, 93, .14);
  --container: 1160px;
  --font: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", "Hiragino Sans GB", Arial, sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: var(--primary-light); text-decoration: none; transition: color .2s; }
a:hover { color: var(--accent); }
ul, ol { padding-left: 1.4em; }

.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 28px; border-radius: 999px;
  font-size: 15px; font-weight: 600; line-height: 1.2;
  border: 2px solid transparent; cursor: pointer;
  transition: all .25s;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-light); color: #fff; transform: translateY(-2px); box-shadow: var(--shadow); }
.btn-gold { background: var(--accent); color: #fff; }
.btn-gold:hover { background: #b08f1f; color: #fff; transform: translateY(-2px); box-shadow: var(--shadow); }
.btn-ghost { background: transparent; color: var(--primary); border-color: var(--primary); }
.btn-ghost:hover { background: var(--primary); color: #fff; }
.btn-light { background: rgba(255,255,255,.12); color: #fff; border-color: rgba(255,255,255,.4); }
.btn-light:hover { background: rgba(255,255,255,.22); color: #fff; }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.96);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.nav-wrap { display: flex; align-items: center; justify-content: space-between; height: 150px; }
.brand { display: flex; align-items: center; gap: 12px; }
.brand-mark {
  width: 42px; height: 42px; border-radius: 10px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  color: #fff; display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 18px; letter-spacing: -1px;
}
.brand-name { font-size: 17px; font-weight: 800; color: var(--ink); line-height: 1.3; }
.brand-name small { display: block; font-size: 11px; font-weight: 500; color: var(--ink-soft); letter-spacing: .5px; }
.brand-logo-img { height: 120px; width: auto; display: block; }
.main-nav { display: flex; gap: 4px; align-items: center; }
@media (max-width: 960px) {
  .brand-logo-img { height: 84px; }
  .nav-wrap { height: 110px; }
}
.main-nav a {
  padding: 8px 14px; border-radius: 8px;
  font-size: 15px; font-weight: 500; color: var(--ink);
}
.main-nav a:hover, .main-nav a.active { color: var(--primary); background: var(--bg-soft); }
.nav-cta { margin-left: 8px; padding: 9px 20px; font-size: 14px; }
.nav-toggle { display: none; background: none; border: 0; cursor: pointer; padding: 8px; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--ink); margin: 5px 0; border-radius: 2px; }

@media (max-width: 960px) {
  .nav-toggle { display: block; }
  .main-nav {
    position: absolute; top: 110px; left: 0; right: 0;
    flex-direction: column; align-items: stretch;
    background: #fff; border-bottom: 1px solid var(--line);
    padding: 12px 20px 20px; gap: 4px; display: none;
  }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 12px 14px; }
  .nav-cta { margin: 8px 0 0; text-align: center; }
}

/* ---------- 首页 Hero ---------- */
.hero {
  position: relative; color: #fff;
  background: linear-gradient(135deg, #0b2a44 0%, #0e3a5d 55%, #14537f 100%);
  overflow: hidden;
}
.hero::before {
  content: ""; position: absolute; right: -120px; top: -120px;
  width: 480px; height: 480px; border-radius: 50%;
  background: radial-gradient(circle, rgba(201,162,39,.22) 0%, transparent 65%);
}
.hero::after {
  content: ""; position: absolute; left: -160px; bottom: -200px;
  width: 520px; height: 520px; border-radius: 50%;
  background: radial-gradient(circle, rgba(27,91,138,.35) 0%, transparent 62%);
}
.hero-inner { position: relative; z-index: 2; padding: 96px 0 88px; }
.hero-tag {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(255,255,255,.1); border: 1px solid rgba(255,255,255,.22);
  color: #f3e3ae; font-size: 13px; font-weight: 600;
  padding: 6px 16px; border-radius: 999px; margin-bottom: 22px;
  letter-spacing: 1px;
}
.hero h1 { font-size: 44px; line-height: 1.3; font-weight: 800; letter-spacing: 1px; }
.hero h1 em { font-style: normal; color: var(--accent); }
.hero-sub { margin: 20px 0 34px; font-size: 17px; color: rgba(255,255,255,.85); max-width: 640px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

.hero-stats {
  position: relative; z-index: 2;
  background: rgba(255,255,255,.07);
  border: 1px solid rgba(255,255,255,.14);
  border-radius: var(--radius);
  display: grid; grid-template-columns: repeat(4, 1fr);
  margin-bottom: -46px;
  backdrop-filter: blur(4px);
}
.hero-stat { padding: 26px 18px; text-align: center; border-right: 1px solid rgba(255,255,255,.12); }
.hero-stat:last-child { border-right: 0; }
.hero-stat b { display: block; font-size: 30px; font-weight: 800; color: #f3e3ae; }
.hero-stat span { font-size: 13px; color: rgba(255,255,255,.75); }
@media (max-width: 720px) {
  .hero h1 { font-size: 32px; }
  .hero-inner { padding: 64px 0 72px; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); margin-bottom: -70px; }
  .hero-stat { border-bottom: 1px solid rgba(255,255,255,.12); }
}

/* ---------- 通用板块 ---------- */
.section { padding: 92px 0; }
.section.soft { background: var(--bg-soft); }
.section.deep { background: var(--bg-deep); color: #fff; }
.section-head { max-width: 720px; margin: 0 auto 52px; text-align: center; }
.kicker {
  display: inline-block; font-size: 13px; font-weight: 700; letter-spacing: 2px;
  color: var(--accent); text-transform: uppercase; margin-bottom: 12px;
}
.section-head h2 { font-size: 32px; font-weight: 800; line-height: 1.35; }
.section-head p { margin-top: 14px; color: var(--ink-soft); font-size: 16px; }
.section.deep .section-head p { color: rgba(255,255,255,.72); }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }

/* ---------- 卡片网格 ---------- */
.grid { display: grid; gap: 24px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 960px) { .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 620px) { .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; } }

.card {
  background: #fff; border: 1px solid var(--line);
  border-radius: var(--radius); padding: 28px;
  transition: all .3s; position: relative; overflow: hidden;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: transparent; }
.card-icon {
  width: 52px; height: 52px; border-radius: 12px;
  background: var(--accent-soft); color: var(--primary);
  display: flex; align-items: center; justify-content: center;
  font-size: 24px; margin-bottom: 18px;
}
.card h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; }
.card p { font-size: 14.5px; color: var(--ink-soft); }
.card .card-link { display: inline-block; margin-top: 14px; font-size: 14px; font-weight: 600; color: var(--primary-light); }
.card .card-link::after { content: " →"; }

/* 深色卡片 */
.card.dark { background: rgba(255,255,255,.06); border-color: rgba(255,255,255,.14); color: #fff; }
.card.dark h3 { color: #fff; }
.card.dark p { color: rgba(255,255,255,.72); }
.card.dark .card-icon { background: rgba(201,162,39,.18); color: #f3e3ae; }

/* ---------- 双品牌区 ---------- */
.brand-row { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
@media (max-width: 760px) { .brand-row { grid-template-columns: 1fr; } }
.brand-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 36px; position: relative; overflow: hidden;
}
.brand-card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
}
.brand-card h3 { font-size: 21px; font-weight: 800; margin-bottom: 6px; }
.brand-card .brand-sub { font-size: 13px; color: var(--accent); font-weight: 700; letter-spacing: 1px; }
.brand-card p { margin: 16px 0 20px; color: var(--ink-soft); font-size: 15px; }
.brand-card ul { list-style: none; padding: 0; }
.brand-card li { padding: 7px 0 7px 26px; position: relative; font-size: 14.5px; color: var(--ink); }
.brand-card li::before {
  content: "✓"; position: absolute; left: 0; top: 7px;
  width: 18px; height: 18px; border-radius: 50%;
  background: var(--accent-soft); color: var(--accent);
  font-size: 11px; font-weight: 800; display: flex; align-items: center; justify-content: center;
}

/* ---------- 关于我们团队区 ---------- */
.about-team {
  display: grid; grid-template-columns: 1.1fr 1fr; gap: 56px; align-items: center;
}
@media (max-width: 860px) { .about-team { grid-template-columns: 1fr; gap: 32px; } }
.about-team > *:only-child {
  grid-column: 1 / -1;
  max-width: 860px;
  margin: 0 auto;
}
.about-team-img {
  border-radius: var(--radius); overflow: hidden;
  box-shadow: var(--shadow-lg); border: 1px solid var(--line);
}
.about-team-img img { width: 100%; height: auto; object-fit: cover; }
.about-team-text h2 { font-size: 28px; font-weight: 800; margin-bottom: 16px; }
.about-team-text p { color: var(--ink-soft); margin-bottom: 14px; }
.check-list { list-style: none; padding: 0; margin-top: 18px; }
.check-list li {
  padding: 8px 0 8px 28px; position: relative; font-size: 15px; color: var(--ink);
}
.check-list li::before {
  content: "✓"; position: absolute; left: 0; top: 8px;
  width: 20px; height: 20px; border-radius: 50%;
  background: var(--accent-soft); color: var(--accent);
  font-size: 12px; font-weight: 800; display: flex; align-items: center; justify-content: center;
}

/* ---------- 数据/信任带 ---------- */
.trust-strip {
  background: var(--bg-deep); color: #fff; padding: 34px 0;
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.trust-strip .grid { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 18px; }
.trust-item { display: flex; align-items: center; gap: 10px; font-size: 14px; color: rgba(255,255,255,.85); }
.trust-item b { color: #f3e3ae; font-size: 16px; }
.trust-item .tick { color: var(--accent); font-weight: 800; }

/* ---------- 案例 ---------- */
.case-card { padding: 30px; }
.case-num { font-size: 12px; font-weight: 800; color: var(--accent); letter-spacing: 2px; }
.case-card h3 { margin: 8px 0 12px; }
.case-tags { display: flex; gap: 8px; flex-wrap: wrap; margin: 16px 0 0; }
.case-tag {
  font-size: 12px; padding: 4px 12px; border-radius: 999px;
  background: var(--bg-soft); color: var(--primary-light); font-weight: 600;
}

/* ---------- 案例详情折叠区 ---------- */
.case-detail { margin-top: 14px; border-top: 1px dashed var(--line); padding-top: 12px; }
.case-detail summary {
  cursor: pointer; font-size: 13px; font-weight: 700; color: var(--primary);
  list-style: none; display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 12px; border-radius: 6px; background: var(--bg-soft);
  transition: background .2s;
}
.case-detail summary::-webkit-details-marker { display: none; }
.case-detail summary::before {
  content: "▶"; font-size: 10px; color: var(--accent);
  transition: transform .2s;
}
.case-detail[open] summary::before { transform: rotate(90deg); }
.case-detail summary:hover { background: #e6ecf3; }
.case-detail-body { margin-top: 12px; animation: fadeIn .25s ease; }
.case-extlink {
  display: inline-block; margin-top: 10px; font-size: 13px; font-weight: 700;
  color: var(--accent); text-decoration: none; padding: 4px 0;
  border-bottom: 1.5px solid var(--accent);
}
.case-extlink:hover { color: var(--primary); border-color: var(--primary); }
@keyframes fadeIn { from { opacity: 0; transform: translateY(-4px); } to { opacity: 1; transform: none; } }

/* ---------- 时间线 ---------- */
.timeline { position: relative; max-width: 820px; margin: 0 auto; padding-left: 40px; }
.timeline::before { content: ""; position: absolute; left: 12px; top: 6px; bottom: 6px; width: 2px; background: var(--line); }
.tl-item { position: relative; padding: 0 0 36px 28px; }
.tl-item:last-child { padding-bottom: 0; }
.tl-item::before {
  content: ""; position: absolute; left: -34px; top: 6px;
  width: 14px; height: 14px; border-radius: 50%;
  background: var(--accent); border: 3px solid #fff; box-shadow: 0 0 0 2px var(--accent);
}
.tl-year { font-size: 20px; font-weight: 800; color: var(--primary); }
.tl-item h4 { font-size: 16px; margin: 4px 0 6px; }
.tl-item p { font-size: 14.5px; color: var(--ink-soft); }

/* ---------- 干货文章 ---------- */
.article-hero { background: var(--bg-deep); color: #fff; padding: 64px 0 56px; }
.article-hero .kicker { color: #f3e3ae; }
.article-hero h1 { font-size: 34px; line-height: 1.4; font-weight: 800; }
.article-hero .meta { margin-top: 16px; font-size: 14px; color: rgba(255,255,255,.65); display: flex; gap: 18px; flex-wrap: wrap; }
.article-body { max-width: 780px; margin: 0 auto; padding: 52px 24px 80px; }
.article-body h2 { font-size: 24px; margin: 40px 0 16px; font-weight: 800; color: var(--primary); }
.article-body h3 { font-size: 19px; margin: 30px 0 12px; font-weight: 700; }
.article-body p { margin-bottom: 16px; color: #333f52; }
.article-body ul, .article-body ol { margin-bottom: 18px; }
.article-body li { margin-bottom: 8px; color: #333f52; }
.article-body blockquote {
  margin: 24px 0; padding: 18px 22px; border-left: 4px solid var(--accent);
  background: var(--bg-soft); border-radius: 0 10px 10px 0; color: var(--ink-soft);
}
.article-body table { width: 100%; border-collapse: collapse; margin: 20px 0; font-size: 14.5px; }
.article-body th, .article-body td { border: 1px solid var(--line); padding: 10px 14px; text-align: left; }
.article-body th { background: var(--bg-soft); font-weight: 700; }
.note-block { background: #f6ecd2; border: 1px solid #e3cf8f; border-radius: 8px; color: #6b5a1e; font-size: 13.5px; line-height: 1.7; }
.insight-backlink { margin: 30px 0 8px; padding: 16px 18px; background: var(--bg-soft); border: 1px solid var(--line); border-radius: 10px; display: flex; gap: 12px; align-items: flex-start; }
.insight-backlink .ib-tag { flex: 0 0 auto; background: var(--accent); color: #fff; font-size: 12px; font-weight: 700; padding: 4px 10px; border-radius: 20px; white-space: nowrap; }
.insight-backlink a { color: var(--primary); font-weight: 600; text-decoration: none; }
.insight-backlink a:hover { text-decoration: underline; }
.section-tight { padding: 0 0 92px; }
.article-tip {
  margin: 24px 0; padding: 18px 20px; border-radius: 10px;
  background: var(--accent-soft); border: 1px solid rgba(201,162,39,.35);
  font-size: 14.5px; color: #6b5a1e;
}
.article-tip b { color: var(--primary); }

/* ---------- 列表/表格页 ---------- */
.news-list { max-width: 820px; margin: 0 auto; }
.news-item {
  display: flex; gap: 24px; padding: 26px 0;
  border-bottom: 1px solid var(--line); align-items: flex-start;
}
.news-item .date {
  flex: 0 0 96px; text-align: center; background: var(--bg-soft);
  border-radius: 10px; padding: 12px 6px;
}
.news-item .date b { display: block; font-size: 20px; color: var(--primary); }
.news-item .date span { font-size: 12px; color: var(--ink-soft); }
.news-item h3 { font-size: 18px; margin-bottom: 8px; }
.news-item h3 a { color: var(--ink); }
.news-item h3 a:hover { color: var(--accent); }
.news-item p { font-size: 14.5px; color: var(--ink-soft); }

/* ---------- 联系页 ---------- */
.contact-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 40px; }
@media (max-width: 860px) { .contact-grid { grid-template-columns: 1fr; } }
.contact-card { background: var(--bg-soft); border-radius: var(--radius); padding: 30px; }
.contact-row { display: flex; gap: 14px; padding: 14px 0; border-bottom: 1px dashed var(--line); align-items: flex-start; }
.contact-row:last-child { border-bottom: 0; }
.contact-row .ico { font-size: 20px; flex: 0 0 30px; }
.contact-row b { display: block; font-size: 13px; color: var(--ink-soft); font-weight: 600; }
.contact-row span, .contact-row a { font-size: 15px; color: var(--ink); }

/* ---------- 页脚 ---------- */
.site-footer { background: var(--bg-deep); color: rgba(255,255,255,.75); padding: 64px 0 30px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.2fr; gap: 40px; margin-bottom: 44px; }
@media (max-width: 860px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .footer-grid { grid-template-columns: 1fr; } }
.footer-brand p { margin-top: 14px; font-size: 14px; color: rgba(255,255,255,.6); }
.footer-col h4 { color: #fff; font-size: 15px; margin-bottom: 16px; font-weight: 700; }
.footer-col a { display: block; color: rgba(255,255,255,.65); font-size: 14px; padding: 5px 0; }
.footer-col a:hover { color: #f3e3ae; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1); padding-top: 24px;
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px;
  font-size: 13px; color: rgba(255,255,255,.5);
}
.footer-bottom a { color: rgba(255,255,255,.65); }

/* ---------- 页内小工具 ---------- */
.crumb { font-size: 13px; color: var(--ink-soft); padding: 18px 0 0; }
.crumb a { color: var(--ink-soft); }
.crumb a:hover { color: var(--accent); }
.page-hero {
  position: relative;
  background:
    linear-gradient(135deg, rgba(9,30,50,0.45) 0%, rgba(13,48,78,0.35) 100%),
    url('../images/page-hero-bg.svg') center/cover no-repeat;
  color: #fff; padding: 60px 0 56px;
  overflow: hidden;
}
.page-hero h1 { font-size: 32px; font-weight: 800; }
/* 栏目专属星空背景 */
.page-hero.hero-patent { background-image: linear-gradient(135deg, rgba(9,30,50,0.45) 0%, rgba(13,48,78,0.35) 100%), url('../images/hero/hero-patent.svg'); }
.page-hero.hero-project { background-image: linear-gradient(135deg, rgba(9,30,50,0.45) 0%, rgba(13,48,78,0.35) 100%), url('../images/hero/hero-project.svg'); }
.page-hero.hero-cases { background-image: linear-gradient(135deg, rgba(9,30,50,0.45) 0%, rgba(13,48,78,0.35) 100%), url('../images/hero/hero-cases.svg'); }
.page-hero.hero-news { background-image: linear-gradient(135deg, rgba(9,30,50,0.45) 0%, rgba(13,48,78,0.35) 100%), url('../images/hero/hero-news.svg'); }
.page-hero.hero-whitepaper { background-image: linear-gradient(135deg, rgba(9,30,50,0.45) 0%, rgba(13,48,78,0.35) 100%), url('../images/hero/hero-whitepaper.svg'); }
.page-hero.hero-about { background-image: linear-gradient(135deg, rgba(9,30,50,0.40) 0%, rgba(13,48,78,0.30) 100%), url('../images/hero/hero-about.svg'); }
.page-hero p { margin-top: 12px; color: rgba(255,255,255,.8); max-width: 720px; }
.page-hero .crumb { color: rgba(255,255,255,.6); padding-top: 0; margin-bottom: 14px; }
.page-hero .crumb a { color: rgba(255,255,255,.6); }

/* 页头横幅（带合影图，左右布局） */
.page-hero.split .container { display: flex; align-items: center; gap: 52px; }
.page-hero-text { flex: 1 1 auto; }
.page-hero-img { flex: 0 0 540px; }
.page-hero-img img {
  width: 100%; border-radius: 16px; display: block;
  border: 4px solid rgba(255,255,255,.22);
  box-shadow: 0 24px 60px rgba(0,0,0,.35);
}
.page-hero.split p { max-width: 560px; }
@media (max-width: 1100px) {
  .page-hero.split .container { gap: 36px; }
  .page-hero-img { flex: 0 0 420px; }
}
@media (max-width: 640px) {
  .page-hero.split .container { flex-direction: column; gap: 28px; align-items: stretch; }
  .page-hero-img { flex: 0 0 auto; width: 100%; }
  .page-hero.split { padding: 40px 0 48px; }
}

.back-top {
  position: fixed; right: 26px; bottom: 26px; z-index: 90;
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--primary); color: #fff; border: 0; cursor: pointer;
  font-size: 18px; box-shadow: var(--shadow-lg); opacity: 0; visibility: hidden;
  transition: all .3s;
}
.back-top.show { opacity: 1; visibility: visible; }
.back-top:hover { background: var(--primary-light); }

/* ---------- 动画 ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: all .6s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ---------- 页头横幅（列表页） ---------- */
.mini-hero { background: linear-gradient(135deg, var(--bg-deep), var(--primary)); color: #fff; padding: 52px 0; }
.mini-hero h1 { font-size: 30px; font-weight: 800; }
.mini-hero p { margin-top: 10px; color: rgba(255,255,255,.78); }

/* 服务详情页流程 */
.steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 16px; }
.step { background: var(--bg-soft); border-radius: 10px; padding: 20px; position: relative; }
.step .no { font-size: 26px; font-weight: 800; color: var(--accent); display: block; margin-bottom: 8px; }
.step b { display: block; margin-bottom: 6px; font-size: 15px; }
.step span { font-size: 13px; color: var(--ink-soft); }

/* 常见问题 */
.faq-item { border: 1px solid var(--line); border-radius: 10px; margin-bottom: 14px; overflow: hidden; }
.faq-q { padding: 18px 22px; font-weight: 700; font-size: 15.5px; cursor: pointer; display: flex; justify-content: space-between; align-items: center; background: #fff; }
.faq-q::after { content: "+"; font-size: 20px; color: var(--accent); font-weight: 800; }
.faq-item.open .faq-q::after { content: "−"; }
.faq-a { padding: 0 22px; max-height: 0; overflow: hidden; transition: max-height .3s ease; color: var(--ink-soft); font-size: 14.5px; }
.faq-item.open .faq-a { max-height: 400px; padding-bottom: 18px; }

/* CTA 条 */
.cta-band { background: linear-gradient(120deg, var(--primary), var(--primary-light)); color: #fff; border-radius: var(--radius); padding: 48px; text-align: center; position: relative; overflow: hidden; }
.cta-band::before { content: ""; position: absolute; right: -80px; top: -80px; width: 260px; height: 260px; border-radius: 50%; background: radial-gradient(circle, rgba(201,162,39,.25), transparent 65%); }
.cta-band h2 { font-size: 26px; font-weight: 800; margin-bottom: 10px; }
.cta-band p { color: rgba(255,255,255,.8); margin-bottom: 24px; }
.cta-band .btn { position: relative; z-index: 2; }
.cta-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; position: relative; z-index: 2; }

/* 行业观点 相关阅读 & 栏目枢纽 */
.rel-list { list-style: none; padding: 0; margin: 6px 0 0; }
.rel-list li { padding: 7px 0; border-bottom: 1px dashed var(--line); }
.rel-list li:last-child { border-bottom: none; }
.rel-list a { color: var(--primary); font-weight: 600; text-decoration: none; }
.rel-list a:hover { text-decoration: underline; }
.rel-home { display: inline-block; margin-top: 10px; color: var(--accent); font-weight: 700; text-decoration: none; }
.insight-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 28px; }
.insight-card { display: block; background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 22px; text-decoration: none; color: inherit; transition: transform .2s, box-shadow .2s; }
.insight-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.insight-card h3 { font-size: 17px; font-weight: 800; color: var(--primary); margin-bottom: 10px; line-height: 1.5; }
.insight-card p { font-size: 13.5px; color: var(--ink-soft); }
@media (max-width: 860px) { .insight-grid { grid-template-columns: 1fr; } }

/* 珠峰三图：白边一字排开 */
.everest-gallery { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 6px; }
.everest-frame { background: #fff; padding: 10px; border-radius: 8px; box-shadow: var(--shadow-lg); }
.everest-frame img { width: 100%; height: 260px; object-fit: cover; border-radius: 3px; display: block; }
@media (max-width: 860px) { .everest-gallery { grid-template-columns: 1fr; } .everest-frame img { height: 220px; } }

/* 创始人版块：文字在左、照片在右，左右并排（照片列：上 1 张国旗照、下 2 张小图） */
.founder-block { display: grid; grid-template-columns: 1fr 0.82fr; gap: 44px; align-items: start; }
.founder-block-text { order: 1; }
.founder-block-photos { order: 2; }
.founder-block-text h2 { font-size: 28px; font-weight: 800; margin-bottom: 16px; }
.founder-block-text p { color: var(--ink-soft); margin-bottom: 14px; }
.founder-block-photos .everest-frame { padding: 7px; border-radius: 6px; }
.founder-block-photos .everest-frame img { height: 118px; object-fit: cover; border-radius: 2px; }
.founder-block-photos .fp-top { margin-bottom: 20px; }
.founder-block-photos .fp-top img { height: auto; object-fit: cover; object-position: top; }
.fp-bottom { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
@media (max-width: 860px) { .founder-block { grid-template-columns: 1fr; gap: 28px; } .founder-block-text { order: 1; } .founder-block-photos { order: 2; } .founder-block-photos .fp-top { margin-bottom: 16px; } .founder-block-photos .fp-top img { height: auto; } .founder-block-photos .everest-frame img { height: 110px; } }

/* ---------- 企业微信二维码弹窗 ---------- */
.wechat-modal {
  position: fixed; inset: 0; z-index: 1000;
  display: none; align-items: center; justify-content: center;
  padding: 20px;
}
.wechat-modal.show { display: flex; }
.wechat-modal-backdrop {
  position: absolute; inset: 0;
  background: rgba(11, 42, 68, .72);
  cursor: pointer;
}
.wechat-modal-content {
  position: relative;
  background: #fff; border-radius: var(--radius);
  padding: 32px 28px;
  max-width: 360px; width: 100%;
  text-align: center;
  box-shadow: var(--shadow-lg);
  z-index: 1;
}
.wechat-modal-content h3 {
  font-size: 20px; font-weight: 800;
  color: var(--ink); margin-bottom: 6px;
}
.wechat-modal-content img {
  max-width: 220px; width: 100%;
  margin: 16px auto; border-radius: 8px;
  border: 1px solid var(--line);
}
.wechat-modal-content p {
  font-size: 14px; color: var(--ink-soft); margin-bottom: 0;
}
.wechat-modal-close {
  position: absolute; top: 10px; right: 14px;
  background: none; border: 0;
  font-size: 26px; line-height: 1;
  color: var(--ink-soft); cursor: pointer;
}
.wechat-modal-close:hover { color: var(--ink); }
@media (max-width: 480px) {
  .wechat-modal-content { padding: 26px 20px; }
  .wechat-modal-content img { max-width: 180px; }
}