/* 蓝鲸商研咨询站 — 深墨 + LandAIx 蓝 */
:root {
  --ink: #0b1018;
  --ink-2: #141b26;
  --ink-3: #1c2533;
  --blue: #3d7eff;
  --blue-deep: #2563ff;
  --text: #e8eef7;
  --text-dim: #9aa8bd;
  --line: #2a3546;
  --ok: #3dd68c;
  --max: 1120px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
figure { margin: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--ink);
  color: var(--text);
  font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", -apple-system, sans-serif;
  line-height: 1.75;
  font-size: 16px;
}
a { color: var(--blue); text-decoration: none; }
a:hover { color: #7aa8ff; }

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

header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(11, 16, 24, 0.92); backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav { display: flex; align-items: center; justify-content: space-between; min-height: 68px; gap: 16px; flex-wrap: wrap; padding: 8px 0; }
.logo { display: flex; align-items: center; }
.logo img { height: 28px; width: auto; display: block; }
.nav-links { display: flex; gap: 22px; align-items: center; flex-wrap: wrap; }
.nav-links a { color: var(--text-dim); font-size: 15px; }
.nav-links a.active, .nav-links a:hover { color: var(--text); }
.btn {
  display: inline-block; padding: 10px 24px; border-radius: 8px;
  background: var(--blue); color: #fff !important; font-weight: 600;
  border: none; cursor: pointer; font-size: 15px;
}
.btn:hover { background: var(--blue-deep); }
.btn-ghost {
  background: transparent; color: var(--blue) !important;
  border: 1px solid #3d7eff88;
}
.btn-ghost:hover { background: rgba(61, 126, 255, 0.1); }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }

section { padding: 80px 0; border-bottom: 1px solid var(--line); }
h1 { font-size: 40px; line-height: 1.3; font-weight: 700; }
h2 { font-size: 28px; margin-bottom: 28px; font-weight: 700; }
h2 .num { color: var(--blue); font-size: 16px; display: block; letter-spacing: 2px; margin-bottom: 6px; }
h3 { font-size: 19px; margin-bottom: 10px; }
p.lead { font-size: 18px; color: var(--text-dim); }
.dim { color: var(--text-dim); }
.small { font-size: 13.5px; color: var(--text-dim); }

.hero {
  position: relative;
  padding: 88px 0 72px;
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute; right: -40px; top: -80px;
  width: 420px; height: 420px;
  background: url("whale-tail.png") no-repeat right top / 380px auto;
  opacity: 0.18;
  pointer-events: none;
}
.hero h1 em { color: var(--blue); font-style: normal; }
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 480px);
  gap: 48px;
  align-items: center;
}
.hero p { margin: 22px 0 34px; max-width: 640px; }
.hero-visual {
  position: relative;
}
.hero-visual img,
.shot img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 16px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
  border: 1px solid var(--line);
  object-fit: cover;
}
.hero-visual figcaption,
.shot figcaption {
  position: absolute;
  left: 16px;
  bottom: 16px;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: #d7e4ff;
  background: rgba(11, 16, 24, 0.72);
  border: 1px solid #3d7eff44;
  padding: 6px 10px;
  border-radius: 999px;
}
.shot { position: relative; }
.photo-band {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 16px;
  margin-top: 28px;
}
.photo-band img {
  width: 100%;
  height: 260px;
  object-fit: cover;
  border-radius: 14px;
  border: 1px solid var(--line);
}

.trust { display: flex; gap: 16px; flex-wrap: wrap; }
.trust span {
  padding: 8px 16px; border: 1px solid var(--line); border-radius: 999px;
  color: var(--text-dim); font-size: 14px; background: var(--ink-2);
}

.grid { display: grid; gap: 20px; }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.card {
  background: var(--ink-2); border: 1px solid var(--line); border-radius: 14px;
  padding: 28px;
}
.card.has-photo { padding: 0; overflow: hidden; }
.card-photo {
  height: 168px;
  overflow: hidden;
  background: #1c2533;
}
.card-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.card.has-photo .body { padding: 22px 24px 26px; }
.card.has-photo .icon { margin-top: 0; }
.icon {
  width: 44px; height: 44px; border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(61, 126, 255, 0.12);
  color: var(--blue);
  margin-bottom: 16px;
}
.icon svg { width: 22px; height: 22px; }
.card ul { list-style: none; margin-top: 14px; }
.card ul li { padding: 6px 0 6px 24px; position: relative; color: var(--text-dim); font-size: 15px; }
.card ul li::before { content: "—"; position: absolute; left: 0; color: var(--blue); }

.case-card { overflow: hidden; padding: 0; }
.case-art {
  position: relative;
  height: 220px;
  overflow: hidden;
  background: #1c2533;
}
.case-art img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.case-art span {
  position: absolute;
  left: 16px;
  bottom: 14px;
  font-size: 13px; color: #c5d4ee;
  border: 1px solid #3d7eff55;
  background: #121821cc;
  padding: 4px 10px; border-radius: 999px;
}
.case-card .body { padding: 22px 28px 28px; }

table { width: 100%; border-collapse: collapse; margin-top: 8px; font-size: 15px; }
th, td { text-align: left; padding: 14px 16px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--blue); font-weight: 600; white-space: nowrap; }
td:first-child { color: var(--text); white-space: nowrap; }
td { color: var(--text-dim); }

details { border: 1px solid var(--line); border-radius: 10px; margin-bottom: 12px; background: var(--ink-2); }
summary { padding: 16px 20px; cursor: pointer; font-weight: 600; list-style: none; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; float: right; color: var(--blue); }
details[open] summary::after { content: "–"; }
details div { padding: 0 20px 16px; color: var(--text-dim); }

form { display: grid; gap: 16px; max-width: 560px; }
label { font-size: 14px; color: var(--text-dim); display: block; margin-bottom: 6px; }
input, select, textarea {
  width: 100%; padding: 12px 14px; border-radius: 8px;
  background: var(--ink-2); border: 1px solid var(--line); color: var(--text);
  font-size: 15px; font-family: inherit;
}
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--blue); }

footer { padding: 40px 0 60px; }
footer .wrap { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 20px; align-items: flex-start; }
.legal { max-width: 520px; }
.legal .logo { margin-bottom: 10px; }

.timeline { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; margin-top: 12px; }
.timeline .step { padding: 0; border: 1px solid var(--line); border-radius: 14px; overflow: hidden; background: var(--ink-2); }
.timeline .step img { width: 100%; height: 120px; object-fit: cover; display: block; }
.timeline .step .txt { padding: 16px 18px 20px; border-left: none; }
.timeline .step b { display: block; color: var(--blue); margin-bottom: 6px; }
.quote {
  border-left: 3px solid var(--blue); padding: 16px 22px; background: var(--ink-2);
  border-radius: 0 8px 8px 0; margin: 18px 0; color: var(--text-dim);
}
.kpi { font-size: 26px; font-weight: 700; color: var(--blue); }
.meta-list { list-style: none; }
.meta-list li { padding: 8px 0; border-bottom: 1px solid var(--line); color: var(--text-dim); }
.meta-list strong { color: var(--text); display: inline-block; min-width: 7em; }

.people {
  display: grid;
  grid-template-columns: minmax(240px, 360px) 1fr;
  gap: 40px;
  align-items: center;
}
.people img {
  width: 100%;
  height: auto;
  max-height: none;
  object-fit: cover;
  object-position: center top;
  border-radius: 16px;
  border: 1px solid var(--line);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
  background: #1c2533;
}
.cta-band {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 36px;
  background: var(--ink-2);
}
.cta-band img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.cta-band::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, rgba(11, 16, 24, 0.88), rgba(11, 16, 24, 0.55));
}
.cta-band .cta-copy { position: relative; z-index: 1; }

@media (max-width: 860px) {
  .hero-grid, .people, .photo-band { grid-template-columns: 1fr; }
  .hero-visual { order: -1; }
  .people img { height: auto; }
  .photo-band img { height: 200px; }
}
@media (max-width: 720px) {
  h1 { font-size: 28px; }
  .nav-links { gap: 14px; }
  .nav-links a { font-size: 14px; }
  section { padding: 48px 0; }
  td:first-child { white-space: normal; }
  .logo img { height: 22px; }
}