:root {
  --blue: #1f6feb;
  --blue-soft: #e8f1ff;
  --ink: #111827;
  --muted: #6b7280;
  --line: #e5e7eb;
  --bg: #f8fafc;
  --white: #ffffff;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(17, 24, 39, 0.08);
  --font: "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--white);
  line-height: 1.6;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.container { width: min(1120px, calc(100% - 40px)); margin: 0 auto; }

.site-header {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(10px);
  background: rgba(255,255,255,0.9);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  min-height: 64px; gap: 16px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; }
.brand-mark {
  width: 34px; height: 34px; border-radius: 10px;
  background: linear-gradient(135deg, #1f6feb, #60a5fa);
  color: white; display: grid; place-items: center; font-size: 14px;
}
.brand small { display: block; font-weight: 500; color: var(--muted); font-size: 12px; }
.nav { display: flex; gap: 18px; color: var(--muted); font-size: 14px; }
.nav a:hover { color: var(--blue); }

.hero {
  padding: 56px 0 28px;
  background:
    radial-gradient(circle at 10% 10%, rgba(31,111,235,0.08), transparent 40%),
    radial-gradient(circle at 90% 0%, rgba(96,165,250,0.12), transparent 35%),
    #fff;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 40px;
  align-items: center;
}
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 12px; border-radius: 999px;
  background: var(--blue-soft); color: #1d4ed8;
  font-size: 13px; font-weight: 600;
}
.hero h1 {
  margin: 16px 0 12px;
  font-size: clamp(32px, 5vw, 48px);
  line-height: 1.15; letter-spacing: -0.02em;
}
.hero p { margin: 0 0 22px; color: var(--muted); font-size: 16px; max-width: 34em; }
.cta-row { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 18px; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 18px; border-radius: 12px; border: 1px solid transparent;
  font-weight: 600; font-size: 14px; cursor: pointer; transition: .2s ease;
}
.btn-primary { background: var(--blue); color: #fff; box-shadow: 0 8px 20px rgba(31,111,235,.25); }
.btn-primary:hover { transform: translateY(-1px); }
.btn-ghost { background: #fff; border-color: var(--line); color: var(--ink); }
.btn-ghost:hover { border-color: #cbd5e1; }
.tags { display: flex; flex-wrap: wrap; gap: 8px; }
.tag {
  padding: 6px 10px; border-radius: 999px; border: 1px solid var(--line);
  color: var(--muted); font-size: 12px; background: #fff;
}

.hero-visual {
  position: relative;
  padding: 10px 22px 18px;
}
.hero-visual img {
  width: 100%;
  height: auto;
  aspect-ratio: 1400 / 933;
  object-fit: contain;
  object-position: center;
  border-radius: 20px;
  display: block;
  box-shadow: 0 18px 48px rgba(13, 21, 38, .16);
}
.hero-visual::after {
  content: "";
  position: absolute;
  inset: auto 8px 4px auto;
  width: 58%;
  height: 62%;
  border: 2px solid rgba(31, 111, 235, .22);
  border-radius: 24px;
  z-index: -1;
}
.float-chip {
  position: absolute; z-index: 2;
  font-size: 12.5px; font-weight: 700; letter-spacing: .02em;
  padding: 7px 14px; border-radius: 999px; white-space: nowrap;
  background: rgba(255,255,255,.94); color: var(--ink);
  border: 1px solid var(--line);
  box-shadow: 0 10px 24px rgba(15,23,42,.12);
  backdrop-filter: blur(8px);
  animation: floatY 5.2s ease-in-out infinite;
  animation-delay: var(--d, 0s);
}
.fc1 { top: 12%; left: 6px; --d: 0s; }
.fc2 { top: 28%; right: 6px; --d: 1.3s; }
.fc3 { top: 48%; left: 0; --d: 2.1s; }
.fc4 { bottom: 28%; right: 4px; --d: .7s; }
.fc5 { top: 66%; left: 28px; --d: 1.8s; }
.fc6 { top: 8%; right: 22%; --d: 2.6s; }
.hero-badge {
  position: absolute; left: 28px; bottom: 28px; z-index: 2;
  background: rgba(255,255,255,.94); backdrop-filter: blur(10px);
  border: 1px solid var(--line); border-radius: 14px; padding: 12px 16px;
  box-shadow: 0 10px 24px rgba(15,23,42,.12);
}
.hero-badge b { display: block; font-size: 15px; font-weight: 800; letter-spacing: -.01em; color: #1d4ed8; }
.hero-badge span { font-size: 12px; color: var(--muted); }
@keyframes floatY {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-9px); }
}

.marquee-wrap {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: #fbfdff;
  overflow: hidden;
}
.marquee-label {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 0 0; color: var(--muted); font-size: 13px; font-weight: 600;
}
.marquee {
  display: flex; gap: 0; white-space: nowrap;
  padding: 12px 0 14px;
  width: max-content;
  animation: marquee 40s linear infinite;
}
.marquee:hover { animation-play-state: paused; }
.marquee a {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 0 28px; color: var(--ink); font-size: 14px;
}
.marquee a::before {
  content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--blue);
}
.marquee .source { color: var(--muted); font-size: 12px; }
@keyframes marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

.section { padding: 56px 0; }
.section-head { margin-bottom: 24px; }
.section-head h2 { margin: 0 0 8px; font-size: 28px; letter-spacing: -0.02em; }
.section-head p { margin: 0; color: var(--muted); }

.industry-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.industry-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0;
  background: #fff;
  transition: .2s ease;
  overflow: hidden;
  display: flex; flex-direction: column;
}
.industry-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow);
  border-color: #bfdbfe;
}
.industry-card .thumb {
  aspect-ratio: 16 / 9;
  background: #eef3f8;
  overflow: hidden;
}
.industry-card .thumb img {
  width: 100%; height: 100%;
  object-fit: cover;
  display: block;
  transition: transform .35s ease;
}
.industry-card:hover .thumb img { transform: scale(1.04); }
.industry-card .body { padding: 16px 18px 18px; display: flex; flex-direction: column; flex: 1; }
.industry-card h3 { margin: 0 0 8px; font-size: 18px; }
.industry-card p { margin: 0; color: var(--muted); font-size: 13px; }
.industry-card .link { margin-top: 16px; color: var(--blue); font-size: 13px; font-weight: 600; }

.cases-section { background: #f8fbff; border-top: 1px solid var(--line); }
.case-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.case-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  min-height: 100%;
}
.case-card .media {
  aspect-ratio: 16 / 9;
  background: #0f172a;
  overflow: hidden;
}
.case-card .media img,
.case-card .media video {
  width: 100%; height: 100%;
  object-fit: cover; display: block;
}
.case-card .body { padding: 16px 18px 18px; }
.case-card .client {
  display: inline-flex; align-items: center;
  padding: 3px 8px; border-radius: 999px;
  background: var(--blue-soft); color: #1d4ed8;
  font-size: 12px; font-weight: 600; margin-bottom: 8px;
}
.case-card h3 { margin: 0 0 6px; font-size: 17px; }
.case-card p { margin: 0; color: var(--muted); font-size: 13px; }
.case-empty {
  grid-column: 1 / -1;
  border: 1px dashed #cbd5e1;
  border-radius: var(--radius);
  background: #fff;
  padding: 28px 20px;
  text-align: center;
  color: var(--muted);
}

.package-list, .video-grid { display: grid; gap: 16px; }
.package-card, .video-card {
  border: 1px solid var(--line); border-radius: var(--radius); background: #fff; padding: 18px;
}
.package-card h3 { margin: 0 0 6px; }
.package-card p { margin: 0 0 14px; color: var(--muted); font-size: 14px; }
.slot-row { display: flex; flex-wrap: wrap; gap: 10px; }
.slot {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 12px; border-radius: 10px; background: var(--bg); border: 1px solid var(--line);
  font-size: 13px;
}
.slot.empty { color: var(--muted); }
.video-grid { grid-template-columns: repeat(3, 1fr); }
.video-card video, .video-card .cover {
  width: 100%; aspect-ratio: 16/9; object-fit: cover; border-radius: 10px; background: #0f172a;
}
.video-cover {
  position: relative;
  display: block;
  width: 100%;
  padding: 0;
  border: 0;
  border-radius: 10px;
  overflow: hidden;
  cursor: pointer;
  background: #0f172a;
  aspect-ratio: 16/9;
}
.video-cover img, .video-cover-fallback {
  width: 100%; height: 100%; object-fit: cover; display: block;
}
.video-cover-fallback { background: #0f172a; }
.video-play {
  position: absolute; inset: 0;
  display: grid; place-items: center;
  color: #fff; font-size: 22px;
  background: linear-gradient(180deg, transparent 40%, rgba(0,0,0,.28));
  pointer-events: none;
}
.video-cover:hover .video-play { background: rgba(0,0,0,.28); }
.video-card h3 { margin: 12px 0 4px; font-size: 16px; }
.video-card p { margin: 0; color: var(--muted); font-size: 13px; }
.video-lightbox {
  position: fixed; inset: 0; z-index: 80;
  background: rgba(15, 23, 42, .72);
  display: grid; place-items: center;
  padding: 24px;
}
.video-lightbox[hidden] { display: none; }
.video-lightbox-inner {
  width: min(960px, 100%);
  background: #0f172a;
  border-radius: 16px;
  padding: 14px;
  box-shadow: 0 20px 50px rgba(0,0,0,.35);
}
.video-lightbox-inner video { width: 100%; border-radius: 10px; background: #000; }
.video-lightbox-inner h3 { margin: 10px 4px 0; color: #fff; font-size: 16px; }
.video-lightbox-close {
  float: right; border: 0; background: transparent; color: #e5e7eb;
  cursor: pointer; font-size: 14px; padding: 4px 8px;
}

.footer {
  border-top: 1px solid var(--line);
  padding: 28px 0 40px; color: var(--muted); font-size: 13px;
}
.footer strong { color: var(--ink); }

@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-visual { padding: 0; max-width: 560px; }
  .hero-visual::after { display: none; }
  .float-chip { display: none; }
  .hero-badge { left: 12px; bottom: 12px; }
  .industry-grid { grid-template-columns: repeat(2, 1fr); }
  .case-grid { grid-template-columns: 1fr; }
  .video-grid { grid-template-columns: 1fr; }
  .nav { display: none; }
}
@media (max-width: 560px) {
  .industry-grid { grid-template-columns: 1fr; }
  .case-grid { grid-template-columns: 1fr; }
}