/* ============================================================
   挖藕咨询 WOW Consulting — 官网样式
   品牌蓝 #1928E6 · 品牌橙 #FF9605 · 60-30-10 法则
   字体：等线（DengXian）无衬线体系
   ============================================================ */

:root {
  --blue: #1928E6;
  --blue-deep: #0E1787;
  --blue-ink: #0A1057;
  --blue-soft: #EEF1FE;
  --blue-line: #D9DEFB;
  --orange: #FF9605;
  --orange-deep: #E07F00;
  --orange-soft: #FFF4E2;
  --ink: #171A26;
  --ink-2: #3C4152;
  --muted: #6B7183;
  --line: #E7E9F2;
  --bg: #FFFFFF;
  --bg-soft: #F7F8FC;
  --radius: 16px;
  --shadow: 0 8px 30px rgba(14, 23, 135, .08);
  --shadow-lg: 0 18px 50px rgba(14, 23, 135, .14);
  --font: "DengXian", "等线", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", 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: 1.7;
  -webkit-font-smoothing: antialiased;
  font-size: 16px;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
.container { width: min(1180px, 92%); margin: 0 auto; }

::selection { background: var(--blue); color: #fff; }

/* ---------------- 顶部导航 ---------------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.nav-wrap { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.logo { display: flex; align-items: center; gap: 12px; }
.logo-mark {
  width: 42px; height: 42px; border-radius: 10px;
  background: linear-gradient(135deg, var(--blue) 0%, var(--blue-deep) 100%);
  color: #fff; font-weight: 700; font-size: 20px;
  display: flex; align-items: center; justify-content: center;
  position: relative; overflow: hidden; flex-shrink: 0;
}
.logo-mark::after {
  content: ""; position: absolute; right: -6px; bottom: -8px;
  width: 18px; height: 18px; border-radius: 50%;
  background: var(--orange); opacity: .9;
}
.logo-text { line-height: 1.2; }
.logo-text b { font-size: 19px; letter-spacing: 1px; display: block; }
.logo-text span { font-size: 11px; color: var(--muted); letter-spacing: 2.5px; }

.main-nav ul { display: flex; gap: 6px; align-items: center; }
.main-nav a {
  display: block; padding: 8px 14px; border-radius: 999px;
  font-size: 15px; color: var(--ink-2); font-weight: 500;
  transition: all .2s;
}
.main-nav a:hover { color: var(--blue); background: var(--blue-soft); }
.main-nav a.active { color: var(--blue); background: var(--blue-soft); font-weight: 700; }
.nav-cta {
  margin-left: 10px; background: var(--orange); color: #fff !important;
  font-weight: 700 !important; padding: 10px 22px !important;
  box-shadow: 0 6px 18px rgba(255,150,5,.35);
}
.main-nav a.nav-cta, .main-nav a.nav-cta.active { background: var(--orange) !important; color: #fff !important; }
.nav-cta:hover { background: var(--orange-deep) !important; color: #fff !important; }

.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 8px; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--ink); margin: 5px 0; border-radius: 2px; transition: .3s; }

/* ---------------- 通用区块 ---------------- */
section { padding: 88px 0; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  color: var(--blue); font-weight: 700; font-size: 14px; letter-spacing: 2px;
  margin-bottom: 14px;
}
.eyebrow::before { content: ""; width: 26px; height: 3px; background: var(--orange); border-radius: 2px; }
.sec-title { font-size: clamp(26px, 3.4vw, 38px); font-weight: 800; line-height: 1.3; letter-spacing: .5px; }
.sec-sub { color: var(--muted); margin-top: 12px; font-size: 16px; max-width: 640px; }
.sec-head { margin-bottom: 48px; }
.sec-head.center { text-align: center; }
.sec-head.center .sec-sub { margin-left: auto; margin-right: auto; }
.sec-head.center .eyebrow { justify-content: center; }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 30px; border-radius: 999px; font-weight: 700; font-size: 16px;
  transition: all .25s; cursor: pointer; border: none;
}
.btn-primary { background: var(--orange); color: #fff; box-shadow: 0 8px 22px rgba(255,150,5,.35); }
.btn-primary:hover { background: var(--orange-deep); transform: translateY(-2px); }
.btn-ghost { background: transparent; color: #fff; border: 2px solid rgba(255,255,255,.55); }
.btn-ghost:hover { border-color: #fff; background: rgba(255,255,255,.1); }
.btn-blue { background: var(--blue); color: #fff; }
.btn-blue:hover { background: var(--blue-deep); transform: translateY(-2px); }
.btn-outline { background: #fff; color: var(--blue); border: 2px solid var(--blue-line); }
.btn-outline:hover { border-color: var(--blue); }

/* ---------------- 首页 Hero ---------------- */
.hero {
  position: relative; color: #fff; overflow: hidden;
  background: var(--blue-ink);
  padding: 0;
}
.hero-bg { position: absolute; inset: 0; }
.hero-bg img { width: 100%; height: 100%; object-fit: cover; }
.hero-bg::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(90deg, rgba(10,16,87,.88) 0%, rgba(10,16,87,.55) 45%, rgba(10,16,87,.15) 100%);
}
.hero-inner { position: relative; z-index: 2; padding: 120px 0 130px; }
.hero-tag {
  display: inline-block; padding: 7px 18px; border-radius: 999px;
  background: rgba(255,150,5,.16); border: 1px solid rgba(255,150,5,.5);
  color: var(--orange); font-size: 14px; font-weight: 700; letter-spacing: 1px;
  margin-bottom: 26px;
}
.hero h1 {
  font-size: clamp(34px, 5.2vw, 58px); font-weight: 800; line-height: 1.25;
  letter-spacing: 1px; max-width: 760px;
}
.hero h1 em { color: var(--orange); font-style: normal; }
.hero p.lead { margin-top: 22px; font-size: clamp(15px, 1.6vw, 18px); color: rgba(255,255,255,.85); max-width: 620px; }
.hero-actions { margin-top: 40px; display: flex; gap: 16px; flex-wrap: wrap; }

.hero-stats {
  position: relative; z-index: 2;
  margin-top: -1px;
}
.stats-band {
  background: #fff; border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  display: grid; grid-template-columns: repeat(4, 1fr);
  transform: translateY(-56px); margin-bottom: -56px;
  overflow: hidden;
}
.stat { padding: 30px 20px; text-align: center; position: relative; }
.stat + .stat::before { content: ""; position: absolute; left: 0; top: 22%; height: 56%; width: 1px; background: var(--line); }
.stat b { font-size: 32px; color: var(--blue); font-weight: 800; display: block; line-height: 1.2; }
.stat b i { font-style: normal; color: var(--orange); font-size: 20px; }
.stat span { color: var(--muted); font-size: 14px; }

/* ---------------- 能力卡片 ---------------- */
.cap-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.cap-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 36px 30px; transition: all .3s; position: relative; overflow: hidden;
}
.cap-card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 4px;
  background: var(--blue); transform: scaleX(0); transform-origin: left; transition: .35s;
}
.cap-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: transparent; }
.cap-card:hover::before { transform: scaleX(1); }
.cap-num { font-size: 14px; font-weight: 800; color: var(--orange); letter-spacing: 2px; }
.cap-card h3 { font-size: 22px; margin: 10px 0 6px; font-weight: 800; }
.cap-card .cap-line { color: var(--blue); font-weight: 700; font-size: 14px; margin-bottom: 14px; }
.cap-card p { color: var(--muted); font-size: 15px; }
.cap-card ul { margin-top: 18px; }
.cap-card ul li {
  font-size: 14px; color: var(--ink-2); padding: 7px 0 7px 22px; position: relative;
  border-top: 1px dashed var(--line);
}
.cap-card ul li::before { content: "✓"; position: absolute; left: 0; color: var(--orange); font-weight: 700; }

/* ---------------- 案例 ---------------- */
.logo-wall {
  display: flex; flex-wrap: wrap; gap: 14px; justify-content: center; margin-bottom: 52px;
}
.logo-wall span {
  padding: 12px 30px; border: 1px solid var(--line); border-radius: 999px;
  font-weight: 700; color: var(--ink-2); background: #fff; font-size: 15px;
  transition: .25s;
}
.logo-wall span:hover { border-color: var(--blue); color: var(--blue); background: var(--blue-soft); }

.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.case-card {
  border-radius: var(--radius); overflow: hidden; background: #fff;
  border: 1px solid var(--line); transition: all .3s; display: flex; flex-direction: column;
}
.case-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.case-cover { position: relative; aspect-ratio: 5/4; overflow: hidden; }
.case-cover img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.case-card:hover .case-cover img { transform: scale(1.06); }
.case-cover .badge {
  position: absolute; top: 14px; left: 14px;
  background: rgba(10,16,87,.85); color: #fff; font-size: 12px;
  padding: 5px 12px; border-radius: 999px; backdrop-filter: blur(4px);
}
.case-body { padding: 24px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
.case-tags { display: flex; gap: 8px; flex-wrap: wrap; }
.case-tags span { font-size: 12px; color: var(--blue); background: var(--blue-soft); padding: 3px 10px; border-radius: 999px; font-weight: 600; }
.case-tags span.orange { color: var(--orange-deep); background: var(--orange-soft); }
.case-body h3 { font-size: 19px; font-weight: 800; }
.case-body p { color: var(--muted); font-size: 14px; flex: 1; }
.case-result { display: flex; align-items: center; gap: 8px; color: var(--orange-deep); font-weight: 700; font-size: 14px; }
.case-link { color: var(--blue); font-weight: 700; font-size: 14px; display: inline-flex; align-items: center; gap: 6px; }
.case-link:hover { gap: 10px; }
.case-link { transition: gap .2s; }

/* ---------------- 蓝色数据/背书带 ---------------- */
.band-blue { background: linear-gradient(135deg, var(--blue) 0%, var(--blue-ink) 100%); color: #fff; }
.band-blue .eyebrow { color: var(--orange); }
.band-blue .sec-sub { color: rgba(255,255,255,.75); }

/* ---------------- 方法论 ---------------- */
.method-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 56px; align-items: center; }
.method-img { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-lg); }
.method-points { display: flex; flex-direction: column; gap: 22px; margin-top: 30px; }
.method-point { display: flex; gap: 18px; }
.method-point .dot {
  flex-shrink: 0; width: 46px; height: 46px; border-radius: 12px;
  background: var(--blue-soft); color: var(--blue); font-weight: 800;
  display: flex; align-items: center; justify-content: center; font-size: 17px;
}
.method-point h4 { font-size: 17px; font-weight: 800; margin-bottom: 4px; }
.method-point p { color: var(--muted); font-size: 14.5px; }

/* ---------------- CTA ---------------- */
.cta-band {
  background: linear-gradient(120deg, var(--blue) 0%, var(--blue-deep) 70%);
  border-radius: 22px; color: #fff; padding: 56px 60px;
  display: flex; align-items: center; justify-content: space-between; gap: 30px;
  position: relative; overflow: hidden;
}
.cta-band::after {
  content: ""; position: absolute; right: -60px; top: -60px; width: 240px; height: 240px;
  border-radius: 50%; background: rgba(255,150,5,.22);
}
.cta-band::before {
  content: ""; position: absolute; right: 90px; bottom: -90px; width: 200px; height: 200px;
  border-radius: 50%; background: rgba(255,255,255,.08);
}
.cta-band h3 { font-size: clamp(22px, 2.6vw, 30px); font-weight: 800; position: relative; z-index: 2; }
.cta-band p { color: rgba(255,255,255,.8); margin-top: 8px; position: relative; z-index: 2; }
.cta-band .btn { position: relative; z-index: 2; flex-shrink: 0; }

/* ---------------- 页脚 ---------------- */
.site-footer { background: var(--blue-ink); color: rgba(255,255,255,.75); padding: 64px 0 0; margin-top: 0; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 40px; padding-bottom: 48px; }
.footer-grid h5 { color: #fff; font-size: 16px; margin-bottom: 18px; font-weight: 700; }
.footer-grid a { display: block; padding: 5px 0; font-size: 14px; transition: .2s; }
.footer-grid a:hover { color: var(--orange); }
.footer-brand p { font-size: 14px; margin-top: 14px; max-width: 300px; }
.footer-contact li { font-size: 14px; padding: 5px 0; display: flex; gap: 8px; }
.footer-contact b { color: var(--orange); font-weight: 600; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.12); padding: 20px 0; font-size: 13px; }
.footer-bottom .container { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; }

/* ---------------- 内页 Hero ---------------- */
.page-hero { background: linear-gradient(135deg, var(--blue-ink) 0%, var(--blue) 100%); color: #fff; padding: 84px 0 64px; position: relative; overflow: hidden; }
.page-hero::after { content: ""; position: absolute; right: -80px; bottom: -120px; width: 320px; height: 320px; border-radius: 50%; background: rgba(255,150,5,.18); }
.page-hero .eyebrow { color: var(--orange); }
.page-hero h1 { font-size: clamp(30px, 4vw, 44px); font-weight: 800; letter-spacing: 1px; }
.page-hero p { color: rgba(255,255,255,.8); margin-top: 14px; max-width: 640px; }
.crumbs { font-size: 13px; color: rgba(255,255,255,.6); margin-bottom: 18px; }
.crumbs a:hover { color: var(--orange); }

/* ---------------- 案例筛选 ---------------- */
.filter-bar { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 36px; }
.filter-bar button {
  border: 1px solid var(--line); background: #fff; border-radius: 999px;
  padding: 8px 20px; font-size: 14px; cursor: pointer; font-family: var(--font);
  color: var(--ink-2); transition: .2s; font-weight: 600;
}
.filter-bar button.active, .filter-bar button:hover { background: var(--blue); color: #fff; border-color: var(--blue); }

/* ---------------- 案例详情 ---------------- */
.case-hero-meta { display: flex; gap: 26px; flex-wrap: wrap; margin-top: 26px; }
.case-hero-meta div span { display: block; font-size: 12px; color: rgba(255,255,255,.6); letter-spacing: 1px; }
.case-hero-meta div b { font-size: 15px; }
.case-layout { display: grid; grid-template-columns: 1.5fr .9fr; gap: 46px; align-items: start; }
.case-flow { display: flex; flex-direction: column; gap: 0; }
.flow-step { position: relative; padding: 0 0 34px 46px; }
.flow-step::before { content: ""; position: absolute; left: 15px; top: 34px; bottom: 0; width: 2px; background: var(--blue-line); }
.flow-step:last-child::before { display: none; }
.flow-step .n {
  position: absolute; left: 0; top: 0; width: 32px; height: 32px; border-radius: 50%;
  background: var(--blue); color: #fff; font-weight: 800; font-size: 14px;
  display: flex; align-items: center; justify-content: center;
}
.flow-step h4 { font-size: 18px; font-weight: 800; margin-bottom: 6px; }
.flow-step p { color: var(--muted); font-size: 15px; }
.case-side { position: sticky; top: 96px; }
.case-side .side-card { background: var(--bg-soft); border-radius: var(--radius); padding: 28px; border: 1px solid var(--line); }
.case-side img { border-radius: 12px; margin-bottom: 20px; }
.side-card h5 { font-size: 16px; margin-bottom: 12px; }
.side-card ul li { font-size: 14px; color: var(--ink-2); padding: 8px 0; border-top: 1px dashed var(--line); display: flex; justify-content: space-between; gap: 10px; }
.side-card ul li span { color: var(--muted); }

/* ---------------- 关于/团队 ---------------- */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.about-img { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-lg); }
.timeline { margin-top: 34px; display: flex; flex-direction: column; gap: 0; }
.tl-item { position: relative; padding: 0 0 26px 34px; }
.tl-item::before { content: ""; position: absolute; left: 8px; top: 8px; bottom: -4px; width: 2px; background: var(--blue-line); }
.tl-item:last-child::before { display: none; }
.tl-item::after { content: ""; position: absolute; left: 3px; top: 4px; width: 12px; height: 12px; border-radius: 50%; background: var(--orange); box-shadow: 0 0 0 4px var(--orange-soft); }
.tl-item b { color: var(--blue); font-size: 15px; }
.tl-item p { color: var(--ink-2); font-size: 15px; }

.team-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.team-grid.core { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 720px) { .team-grid.core { grid-template-columns: 1fr; } }
.team-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 30px 24px; text-align: center; transition: .3s; }
.team-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.team-ava {
  width: 76px; height: 76px; border-radius: 50%; margin: 0 auto 16px;
  background: linear-gradient(135deg, var(--blue) 0%, var(--blue-deep) 100%);
  color: #fff; font-size: 26px; font-weight: 800;
  display: flex; align-items: center; justify-content: center;
}
.team-card:nth-child(even) .team-ava { background: linear-gradient(135deg, var(--orange) 0%, var(--orange-deep) 100%); }
.team-card h4 { font-size: 17px; font-weight: 800; }
.team-card .role { color: var(--orange-deep); font-size: 13px; font-weight: 700; margin: 4px 0 10px; }
.team-card p { color: var(--muted); font-size: 13px; }

/* ---------------- 新闻 ---------------- */
.news-list { display: flex; flex-direction: column; gap: 20px; }
.news-item {
  display: grid; grid-template-columns: 110px 1fr auto; gap: 26px; align-items: center;
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px 30px; transition: .3s;
}
.news-item.with-thumb { grid-template-columns: 110px 150px 1fr auto; }
.news-item:hover { box-shadow: var(--shadow); transform: translateX(6px); border-color: var(--blue-line); }
.news-thumb { width: 150px; height: 96px; border-radius: 10px; overflow: hidden; align-self: center; }
.news-thumb img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform .4s; }
.news-item:hover .news-thumb img { transform: scale(1.06); }
.news-date b { display: block; font-size: 26px; color: var(--blue); font-weight: 800; line-height: 1.1; }
.news-date span { color: var(--muted); font-size: 13px; }
.news-item h4 { font-size: 17px; font-weight: 700; margin-bottom: 6px; }
.news-item p { color: var(--muted); font-size: 14px; }
.news-item .arrow { color: var(--blue); font-size: 20px; }

/* ---------------- 联系/表单 ---------------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1.1fr; gap: 46px; align-items: start; }
.info-cards { display: flex; flex-direction: column; gap: 18px; }
.info-card { display: flex; gap: 16px; align-items: flex-start; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; }
.info-card .ic {
  flex-shrink: 0; width: 46px; height: 46px; border-radius: 12px;
  background: var(--blue-soft); color: var(--blue); font-size: 20px;
  display: flex; align-items: center; justify-content: center;
}
.info-card h5 { font-size: 15px; font-weight: 800; margin-bottom: 4px; }
.info-card p { color: var(--muted); font-size: 14px; }
.info-card p b { color: var(--ink); font-size: 16px; }
.info-card .qr-img { flex-shrink: 0; width: 112px; border-radius: 10px; border: 1px solid var(--line); align-self: center; }
@media (max-width: 720px) { .info-card .qr-img { width: 96px; } }

.form-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 40px; box-shadow: var(--shadow); }
.form-card h3 { font-size: 22px; font-weight: 800; margin-bottom: 6px; }
.form-card > p { color: var(--muted); font-size: 14px; margin-bottom: 26px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 14px; font-weight: 700; margin-bottom: 7px; }
.form-group label i { color: var(--orange); font-style: normal; }
.form-group input, .form-group select, .form-group textarea {
  width: 100%; border: 1.5px solid var(--line); border-radius: 10px;
  padding: 12px 14px; font-size: 15px; font-family: var(--font); color: var(--ink);
  transition: .2s; background: var(--bg-soft);
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  outline: none; border-color: var(--blue); background: #fff;
  box-shadow: 0 0 0 4px rgba(25,40,230,.08);
}
.form-group textarea { resize: vertical; min-height: 110px; }
.form-ok { display: none; background: var(--orange-soft); border: 1px solid var(--orange); color: var(--orange-deep); border-radius: 10px; padding: 12px 16px; font-size: 14px; font-weight: 700; margin-top: 14px; }

/* ---------------- 服务页 ---------------- */
.svc-block { display: grid; grid-template-columns: .9fr 1.1fr; gap: 50px; align-items: center; padding: 56px 0; border-top: 1px solid var(--line); }
.svc-block:first-of-type { border-top: none; padding-top: 0; }
.svc-block:nth-child(even) .svc-visual { order: 2; }
.svc-visual { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); aspect-ratio: 16/10; }
.svc-visual img { width: 100%; height: 100%; object-fit: cover; }
.svc-tag { display: inline-block; background: var(--blue); color: #fff; border-radius: 999px; padding: 5px 16px; font-size: 13px; font-weight: 700; margin-bottom: 14px; }
.svc-block h3 { font-size: 26px; font-weight: 800; margin-bottom: 6px; }
.svc-block .svc-line { color: var(--orange-deep); font-weight: 700; margin-bottom: 16px; }
.svc-block p.desc { color: var(--muted); font-size: 15px; margin-bottom: 20px; }
.svc-chips { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 22px; }
.svc-chips span { background: var(--blue-soft); color: var(--blue); font-size: 13.5px; font-weight: 600; padding: 7px 16px; border-radius: 999px; }
.svc-cases { font-size: 14px; color: var(--muted); }
.svc-cases b { color: var(--ink); }

/* ---------------- 方法论页书籍 ---------------- */
.book-flex { display: flex; gap: 46px; align-items: center; background: var(--blue-soft); border-radius: 22px; padding: 46px; }
.book-cover {
  flex-shrink: 0; width: 210px; aspect-ratio: 3/4.2; border-radius: 6px 14px 14px 6px;
  background: #fff; display: flex; align-items: center; justify-content: center;
  box-shadow: 4px 6px 20px rgba(0,0,0,.18); position: relative; overflow: hidden;
}
.book-cover img { width: 100%; height: 100%; object-fit: cover; display: block; }
.book-cover::after { content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 6px; background: linear-gradient(90deg, rgba(0,0,0,.18) 0%, transparent 100%); }

/* ---------------- 响应式 ---------------- */
@media (max-width: 1024px) {
  .cap-grid, .case-grid { grid-template-columns: repeat(2, 1fr); }
  .team-grid { grid-template-columns: repeat(2, 1fr); }
  .method-grid, .about-grid, .contact-grid, .case-layout { grid-template-columns: 1fr; }
  .case-side { position: static; }
  .svc-block { grid-template-columns: 1fr; gap: 28px; }
  .svc-block:nth-child(even) .svc-visual { order: 0; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 720px) {
  section { padding: 60px 0; }
  .main-nav { position: fixed; top: 80px; left: 12px; right: 12px; background: #fff; border: 1px solid var(--line); border-radius: 16px; box-shadow: var(--shadow-lg); opacity: 0; transform: translateY(-10px); pointer-events: none; transition: .22s ease; }
  .main-nav.open { opacity: 1; transform: none; pointer-events: auto; }
  .main-nav ul { display: grid; grid-template-columns: 1fr 1fr; gap: 2px; padding: 12px; }
  .main-nav a { border-radius: 10px; padding: 10px 12px; font-size: 14.5px; }
  .nav-cta { margin-left: 0; text-align: center; grid-column: 1 / -1; padding: 11px 12px !important; }
  .nav-toggle { display: block; }
  .cap-grid, .case-grid, .team-grid { grid-template-columns: 1fr; }
  .stats-band { grid-template-columns: repeat(2, 1fr); }
  .stat:nth-child(3)::before { display: none; }
  .cta-band { flex-direction: column; align-items: flex-start; padding: 40px 30px; }
  .news-item { grid-template-columns: 1fr; gap: 10px; }
  .news-item.with-thumb { grid-template-columns: 1fr; }
  .news-thumb { width: 100%; height: 200px; }
  .news-item .arrow { display: none; }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero-inner { padding: 80px 0 110px; }
  .book-flex { flex-direction: column; text-align: center; }
}

/* ---------------- 动效 ---------------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* ---------------- V2 更新：官方logo / 客户logo墙 / 团队照片 ---------------- */
.logo-img { height: 44px; width: auto; display: block; }
.site-footer .logo-img { height: 52px; margin-bottom: 10px; }
.logo-wall span { padding: 16px 26px; display: flex; align-items: center; justify-content: center; }
.logo-wall img { height: 44px; width: auto; max-width: 160px; object-fit: contain; display: block; }
.team-photo { width: 96px; height: 96px; border-radius: 50%; object-fit: cover; margin: 0 auto 16px; box-shadow: 0 6px 18px rgba(14,23,135,.18); }
.value-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 40px; }
.value-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 30px 26px; text-align: center; }
.value-card .vk { color: var(--orange-deep); font-size: 13px; font-weight: 800; letter-spacing: 2px; }
.value-card h4 { font-size: 19px; margin: 10px 0 8px; font-weight: 800; }
.value-card p { color: var(--muted); font-size: 14px; }
.promise-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.promise-card { background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.16); border-radius: var(--radius); padding: 26px 20px; text-align: center; }
.promise-card b { display: block; color: #fff; font-size: 18px; margin-bottom: 8px; }
.promise-card span { color: var(--orange); font-weight: 700; font-size: 14px; display: block; margin-bottom: 6px; }
.promise-card p { color: rgba(255,255,255,.7); font-size: 18px; }
@media (max-width: 1024px) { .promise-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 720px) { .value-grid, .promise-grid { grid-template-columns: 1fr; } .logo-img { height: 34px; } .site-footer .logo-img { height: 44px; } }

/* ---------------- V3 更新：模型卡 / 更多案例 / 荣誉墙 ---------------- */
.model-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.model-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 24px 22px; }
.model-card b { font-size: 17px; display: block; margin-bottom: 6px; }
.model-card span { color: var(--orange-deep); font-weight: 700; font-size: 13px; display: block; margin-bottom: 6px; }
.model-card p { color: var(--muted); font-size: 13.5px; }
.more-cases { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.more-case { background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 16px 18px; }
.more-case b { display: block; font-size: 15px; margin-bottom: 4px; }
.more-case span { color: var(--muted); font-size: 13px; }
.honor-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.honor-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 22px 18px; text-align: center; }
.honor-card b { color: var(--blue); font-size: 15px; display: block; margin-bottom: 8px; }
.honor-card h5 { font-size: 14.5px; font-weight: 700; margin-bottom: 6px; }
.honor-card span { color: var(--muted); font-size: 12.5px; }
@media (max-width: 1024px) { .model-grid, .more-cases { grid-template-columns: repeat(2, 1fr); } .honor-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 720px) { .model-grid, .more-cases, .honor-grid { grid-template-columns: 1fr; } }

/* ---------------- V4 更新：要素步骤条 / 模型注释 ---------------- */
.ip-steps { display: grid; gap: 12px; }
.ip-step { background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 18px 10px; text-align: center; }
.ip-step b { color: var(--orange); display: block; font-size: 15px; margin-bottom: 6px; }
.ip-step span { font-weight: 700; font-size: 14.5px; }
.ip-step.dark { background: rgba(255,255,255,.08); border-color: rgba(255,255,255,.16); }
.ip-step.dark span { color: #fff; }
.model-note { text-align: center; color: var(--muted); margin-top: 22px; font-size: 14.5px; }
@media (max-width: 1024px) { .ip-steps { grid-template-columns: repeat(3, 1fr) !important; } }
@media (max-width: 720px) { .ip-steps { grid-template-columns: repeat(2, 1fr) !important; } }

/* ============================================================
   V5 更新：全站背景图 / 装饰图体系（2026-08-10）
   新增位图：bg-hero / bg-band / bg-cta / bg-page-hero / bg-section
   ============================================================ */
.hero .deco-dots { top: 96px; right: 6%; width: 220px; height: 120px; opacity: .5; }
.hero .deco-orb.orange { width: 340px; height: 340px; right: 12%; bottom: -120px; opacity: .28; }
.hero-bg::after {
  background: linear-gradient(90deg, rgba(10,16,87,.92) 0%, rgba(10,16,87,.58) 46%, rgba(10,16,87,.18) 100%);
}

/* band-blue 承诺带背景图 */
.band-blue { position: relative; overflow: hidden; }
.band-blue .band-fx { position: absolute; inset: 0; }
.band-blue .deco-dots { bottom: 40px; left: 5%; width: 180px; height: 100px; opacity: .35; }
.band-blue .deco-orb.blue { width: 420px; height: 420px; top: -160px; right: -100px; opacity: .35; }
.band-blue .container { position: relative; z-index: 2; }

/* 内页 Hero 统一背景图 */
.page-hero .ph-bg { position: absolute; inset: 0; }
.page-hero .ph-bg::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(100deg, rgba(10,16,87,.98) 0%, rgba(10,16,87,.62) 55%, rgba(10,16,87,.22) 100%);
}
.page-hero .deco-ring { width: 300px; height: 300px; right: -70px; top: -90px; }
.page-hero .deco-dots { top: 110px; right: 12%; width: 180px; height: 90px; opacity: .4; }
.page-hero .deco-orb.orange { width: 300px; height: 300px; right: 8%; bottom: -140px; opacity: .3; }
.page-hero .container { position: relative; z-index: 2; }

/* CTA 横幅背景图 */
.cta-band .cta-fx { position: absolute; inset: 0; }
.cta-band .cta-fx::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(100deg, rgba(10,16,87,.9) 0%, rgba(10,16,87,.45) 62%, rgba(10,16,87,0) 100%);
}

/* 浅色正文区质感背景 */
.sec-textured { position: relative; overflow: hidden; }
.sec-textured .section-fx { position: absolute; inset: 0; }
.sec-textured .container { position: relative; z-index: 2; }

/* 通用装饰元素 */
.deco { position: absolute; inset: 0; overflow: hidden; pointer-events: none; }
.deco-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(to right, rgba(25,40,230,.06) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(25,40,230,.06) 1px, transparent 1px);
  background-size: 72px 72px;
  opacity: .5;
  -webkit-mask-image: radial-gradient(ellipse 90% 80% at 50% 30%, #000 20%, transparent 78%);
  mask-image: radial-gradient(ellipse 90% 80% at 50% 30%, #000 20%, transparent 78%);
}
.deco-dots {
  position: absolute;
  background-image: radial-gradient(rgba(255,255,255,.5) 1.2px, transparent 1.4px);
  background-size: 26px 26px;
}
.deco-orb { position: absolute; border-radius: 50%; filter: blur(60px); }
.deco-orb.blue { background: var(--blue-soft); opacity: .5; }
.deco-orb.orange { background: var(--orange-soft); opacity: .5; }
.deco-ring { position: absolute; border-radius: 50%; border: 1px solid rgba(255,255,255,.28); opacity: .7; }
.deco-ring::after {
  content: ""; position: absolute; inset: 14px;
  border-radius: 50%; border: 1px dashed rgba(255,150,5,.5); opacity: .7;
}
@media (max-width: 720px) {
  .hero .deco-dots, .page-hero .deco-dots, .band-blue .deco-dots { display: none; }
}

/* ============================================================
   V5.1 修订（2026-08-10，评审修复）
   统一背景为 CSS 背景注入 + 对比度修正 + 动效降级
   ============================================================ */
/* 背景注入统一为容器 CSS 背景（不再依赖 img 节点） */
.band-blue .band-fx { background-image: url(../img/bg-band.wpx); background-size: cover; background-position: center; opacity: .5; }
.page-hero .ph-bg { background-image: url(../img/bg-page-hero.wpx); background-size: cover; background-position: center; }
.cta-band .cta-fx { background-image: url(../img/bg-cta.wpx); background-size: cover; background-position: center; }
.sec-textured .section-fx {
  background:
    radial-gradient(ellipse 60% 55% at 12% 8%, rgba(25,40,230,.10) 0%, transparent 70%),
    radial-gradient(ellipse 55% 50% at 88% 92%, rgba(255,150,5,.07) 0%, transparent 70%);
}

/* Hero 遮罩减淡：让丝带与橙色光芯透出（白字对比仍达标） */
.hero-bg::after {
  background: linear-gradient(90deg, rgba(10,16,87,.52) 0%, rgba(10,16,87,.34) 48%, rgba(10,16,87,.12) 100%);
}

/* 深蓝面橙字对比度提升：用提亮橙 #FFB340（对 #1928E6 约 5.5:1） */
.band-blue .eyebrow, .promise-card span, .page-hero .eyebrow { color: #FFB340; }

/* 浅色面小号橙字对比度提升：用墨橙 #C25E00（对白底约 4.6:1） */
.stat b i, .cap-num, .case-result, .case-tags span.orange { color: #C25E00; }

/* 案例封面 a 元素补 display，保证 aspect-ratio 生效 */
.case-cover { display: block; }

/* 光斑 blur 半径收敛，减少 GPU 开销 */
.deco-orb { filter: blur(48px); }

/* reduced-motion 下关闭卡片位移动效 */
@media (prefers-reduced-motion: reduce) {
  .cap-card:hover, .promise-card:hover, .team-card:hover, .case-card:hover { transform: none; }
}

/* ---------------- V5 更新：全员团队卡 ---------------- */
.team-photo-lg { width: 100%; aspect-ratio: 1/1; object-fit: cover; border-radius: 12px; margin-bottom: 12px; }
.team-card.sm { text-align: left; padding: 20px; }
.team-card.sm h4 { font-size: 16px; }
.team-card.sm .role { margin: 2px 0 8px; }
.team-card.sm p { font-size: 12.5px; }
.team-grid.all { gap: 18px; }
@media (max-width: 1024px) { .team-grid.all { grid-template-columns: repeat(3, 1fr) !important; } }
@media (max-width: 720px) { .team-grid.all { grid-template-columns: repeat(2, 1fr) !important; } }

/* ---------------- V6 更新：logo墙统一框 + 方法论增强 ---------------- */
.logo-wall span { width: 150px; height: 88px; padding: 0; border: 1px solid var(--line); border-radius: 14px; background: #fff; display: flex; align-items: center; justify-content: center; }
.logo-wall img { width: auto; height: auto; max-width: 100%; max-height: 100%; object-fit: contain; }
.model-formula { background: var(--blue-soft); border: 1px solid var(--blue-line); border-radius: 14px; padding: 16px 22px; text-align: center; font-weight: 700; color: var(--blue); margin-top: 26px; font-size: 15px; }
.model-formula span { color: var(--orange-deep); }
.case-mini { background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 20px 24px; margin-top: 26px; }
.case-mini h5 { font-size: 15px; margin-bottom: 10px; color: var(--blue); }
.case-mini .row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; font-size: 13px; color: var(--ink-2); }
.case-mini .row b { color: var(--ink); display: block; }
@media (max-width: 720px) { .logo-wall span { width: 44%; } .case-mini .row { grid-template-columns: 1fr; } }

.ip-step.dark p { color: rgba(255,255,255,.72); font-size: 12px; margin-top: 6px; line-height: 1.6; }
.band-blue .case-mini { background: rgba(255,255,255,.08); border-color: rgba(255,255,255,.16); }
.band-blue .case-mini h5 { color: var(--orange); }
.band-blue .case-mini .row { color: rgba(255,255,255,.85); }
.band-blue .case-mini .row b { color: #fff; }

/* 视觉隐藏但保留给读屏软件（无障碍） */
.visually-hidden { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }

/* ---------------- V7 更新：合伙人标签 ---------------- */
.team-tags { display: flex; flex-wrap: wrap; gap: 6px; justify-content: center; margin: 10px 0 8px; }
.team-tags span { background: var(--bg-soft); color: var(--ink-2); font-size: 12px; padding: 4px 10px; border-radius: 999px; border: 1px solid var(--line); }
.team-card.sm .team-tags { justify-content: flex-start; }