:root {
  --bg: #080808;
  --panel: #121212;
  --panel-2: #1c1c1c;
  --text: #f4f4f4;
  --muted: #a6a6a6;
  --line: rgba(255, 255, 255, .12);
  --red: #d40016;
  --red-2: #ff263d;
  --silver: #e7e7e7;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; font-family: Arial, "Microsoft YaHei", sans-serif; color: var(--text); background: var(--bg); letter-spacing: 0; }
a { color: inherit; text-decoration: none; }
.site-header { position: sticky; top: 0; z-index: 10; height: 72px; display: flex; align-items: center; justify-content: space-between; padding: 0 5vw; background: rgba(8,8,8,.82); border-bottom: 1px solid var(--line); backdrop-filter: blur(16px); }
.brand { display: flex; align-items: center; gap: 12px; font-weight: 700; }
.brand img { width: 38px; height: 38px; object-fit: cover; border-radius: 6px; }
nav { display: flex; gap: 26px; color: var(--muted); font-size: 14px; }
nav a:hover, nav a.active, footer a:hover { color: #fff; }
.header-cta, .primary, .secondary, .contact button, .admin-form button, .login-panel button { border: 1px solid rgba(255,255,255,.22); border-radius: 6px; padding: 12px 18px; background: linear-gradient(135deg, var(--red), #6d0008); color: #fff; font-weight: 700; cursor: pointer; text-align: center; line-height: 1.3; }
.hero { min-height: calc(100vh - 72px); display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(360px, .95fr); gap: 52px; align-items: center; padding: 6vw 5vw 4vw; overflow: hidden; background: radial-gradient(circle at 70% 45%, rgba(212,0,22,.2), transparent 36%), linear-gradient(135deg, #050505, #161616 58%, #070707); }
.page-hero { min-height: 520px; display: flex; flex-direction: column; justify-content: center; padding: 8vw 5vw 6vw; background: radial-gradient(circle at 78% 36%, rgba(212,0,22,.22), transparent 32%), linear-gradient(135deg, #050505, #191919 58%, #070707); border-bottom: 1px solid var(--line); }
.page-hero h1 { max-width: 1080px; }
.page-hero .lead { max-width: 880px; }
.hero-kicker-line,
.hero-flow-line,
.hero-solution-line { display: block; }
.hero-kicker-line { max-width: 100%; white-space: nowrap; font-size: clamp(26px, 5vw, 76px); line-height: 1.08; }
.hero-flow-line { width: fit-content; margin: 26px 0 18px; padding: 14px 18px; border: 1px solid rgba(255,255,255,.18); border-left: 4px solid var(--red-2); border-radius: 8px; background: rgba(255,255,255,.055); color: #f5f5f5; font-size: clamp(22px, 2.7vw, 36px); line-height: 1.25; font-weight: 800; }
.hero-flow-line em { color: var(--red-2); font-style: normal; margin: 0 12px; }
.hero-solution-line { color: var(--red-2); font-size: clamp(32px, 4.4vw, 64px); line-height: 1.05; }
.eyebrow { margin: 0 0 14px; color: var(--red-2); font-weight: 800; font-size: 13px; letter-spacing: 0; text-transform: uppercase; }
h1, h2, h3, p { margin-top: 0; }
h1 { max-width: 900px; font-size: clamp(42px, 6vw, 86px); line-height: 1.02; margin-bottom: 26px; letter-spacing: 0; }
h2 { font-size: clamp(30px, 4vw, 56px); line-height: 1.08; margin-bottom: 18px; letter-spacing: 0; }
h3 { font-size: 22px; line-height: 1.25; }
.lead { max-width: 760px; color: #d5d5d5; font-size: 20px; line-height: 1.8; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; margin: 36px 0; }
.secondary { background: rgba(255,255,255,.06); }
.stats { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; max-width: 720px; }
.stats span { border-left: 2px solid var(--red); padding: 12px 16px; background: rgba(255,255,255,.04); color: var(--muted); }
.stats b { display: block; color: #fff; font-size: 24px; }
.hero-visual { position: relative; min-height: 520px; border: 1px solid var(--line); border-radius: 8px; background: linear-gradient(145deg, #232323, #080808); overflow: hidden; box-shadow: inset 0 0 90px rgba(255,255,255,.05), 0 30px 90px rgba(0,0,0,.5); }
.hero-visual:before { content: ""; position: absolute; inset: 0; background-image: linear-gradient(90deg, rgba(255,255,255,.055) 1px, transparent 1px), linear-gradient(rgba(255,255,255,.055) 1px, transparent 1px); background-size: 56px 56px; transform: perspective(600px) rotateX(50deg) scale(1.4); transform-origin: bottom; }
.ai-mark { position: absolute; left: 50%; top: 48%; transform: translate(-50%, -50%) skew(-8deg); font-size: clamp(118px, 14vw, 210px); font-weight: 900; color: var(--silver); text-shadow: 0 7px 0 #8f8f8f, 0 0 34px rgba(212,0,22,.55); }
.beam { position: absolute; left: 18%; right: 10%; top: 59%; height: 3px; background: var(--red-2); box-shadow: 0 0 18px var(--red-2); }
.panel-grid { position: absolute; inset: 22px; border: 1px solid rgba(255,255,255,.1); border-radius: 8px; }
.logo-wall { display: grid; grid-template-columns: repeat(9, minmax(0, 1fr)); gap: 1px; padding: 0 5vw 5vw; background: #050505; }
.logo-wall span { min-height: 72px; display: grid; place-items: center; background: #111; color: #c8c8c8; font-weight: 700; text-align: center; padding: 10px; }
.section { padding: 7vw 5vw; border-top: 1px solid var(--line); }
.section-head { max-width: 900px; margin-bottom: 42px; }
.section-head p, .about p { color: var(--muted); line-height: 1.8; font-size: 18px; }
.service-grid, .case-grid, .post-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.service-card, .case-card, .post-card, .step, .detail-card, .metric-card { background: linear-gradient(180deg, #181818, #101010); border: 1px solid var(--line); border-radius: 8px; padding: 28px; min-height: 250px; }
.service-card span, .step b { color: var(--red-2); font-weight: 900; }
.service-card p, .case-card div, .post-card div, .step p, .detail-card p, .rich-text p { color: var(--muted); line-height: 1.75; }
.service-card a, .more-link a { color: #fff; font-weight: 800; }
.service-detail-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.detail-card h2 { font-size: 28px; }
.detail-card .tagline { color: #fff; font-weight: 800; }
.detail-card ul { margin: 22px 0 0; padding-left: 20px; color: #d6d6d6; line-height: 1.9; }
.split { display: grid; grid-template-columns: .72fr 1.28fr; gap: 56px; align-items: start; }
.rich-text { font-size: 18px; }
.metric-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; }
.metric-card { min-height: 140px; color: #e8e8e8; font-size: 18px; line-height: 1.55; display: flex; align-items: center; }
.expanded { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.wide-timeline { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.method { background: linear-gradient(180deg, #0b0b0b, #151515); }
.timeline { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; }
.agent-band { display: grid; grid-template-columns: .75fr 1.25fr; gap: 36px; align-items: start; padding: 6vw 5vw; background: linear-gradient(120deg, #210005, #101010 48%, #242424); border-top: 1px solid rgba(255,255,255,.16); }
.agent-metrics { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.agent-metrics span { padding: 20px; border: 1px solid rgba(255,255,255,.16); border-radius: 8px; background: rgba(255,255,255,.05); font-weight: 700; }
.case-card p, .post-card p { color: var(--red-2); font-weight: 800; }
.case-card span { display: block; margin-bottom: 18px; color: #fff; font-weight: 800; }
.about { display: grid; grid-template-columns: .55fr 1fr; gap: 56px; background: #101010; }
.contact { display: grid; grid-template-columns: .95fr 1.05fr; gap: 46px; padding: 7vw 5vw; background: radial-gradient(circle at 80% 20%, rgba(212,0,22,.22), transparent 32%), #080808; border-top: 1px solid var(--line); }
.contact form, .login-panel form { display: grid; gap: 14px; }
input, textarea { width: 100%; border: 1px solid rgba(255,255,255,.16); border-radius: 6px; background: rgba(255,255,255,.06); color: #fff; padding: 15px 16px; font: inherit; }
textarea { min-height: 140px; resize: vertical; }
.success { color: #fff; border-left: 3px solid var(--red-2); padding-left: 12px; }
footer { display: flex; justify-content: space-between; gap: 20px; padding: 28px 5vw; border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; }
.admin-body { background: #0d0d0d; }
.login-panel { min-height: 100vh; display: grid; place-items: center; padding: 24px; }
.login-panel form { width: min(420px, 100%); padding: 36px; border: 1px solid var(--line); border-radius: 8px; background: var(--panel); }
.login-panel img { width: 54px; height: 54px; object-fit: cover; border-radius: 8px; }
.error { color: var(--red-2); }
.admin-header { height: 64px; padding: 0 28px; display: flex; justify-content: space-between; align-items: center; border-bottom: 1px solid var(--line); background: #111; }
.admin-shell { padding: 24px; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.admin-card { background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: 22px; }
.wide { grid-column: 1 / -1; }
.admin-form { display: grid; gap: 12px; }
.admin-form label { color: var(--muted); }
.admin-list article, .lead-list article { display: flex; justify-content: space-between; gap: 16px; padding: 16px 0; border-top: 1px solid var(--line); }
.lead-list article { display: block; }
.admin-list p, .lead-list p { color: var(--muted); margin-bottom: 8px; }
.admin-list button { background: transparent; color: var(--red-2); border: 1px solid rgba(255,255,255,.18); border-radius: 6px; padding: 8px 12px; cursor: pointer; }
@media (max-width: 980px) {
  .site-header { height: auto; min-height: 68px; align-items: flex-start; gap: 12px; flex-wrap: wrap; padding-top: 14px; padding-bottom: 14px; }
  nav { order: 3; width: 100%; overflow-x: auto; gap: 18px; padding-bottom: 4px; }
  .hero, .agent-band, .about, .contact { grid-template-columns: 1fr; }
  .split { grid-template-columns: 1fr; }
  .hero { padding-top: 9vw; }
  .hero-visual { min-height: 360px; }
  .logo-wall { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .service-grid, .service-detail-grid, .case-grid, .post-grid, .timeline, .stats, .agent-metrics, .admin-shell, .metric-grid { grid-template-columns: 1fr; }
  footer { flex-direction: column; }
}
@media (max-width: 560px) {
  h1 { font-size: 40px; }
  .hero-kicker-line { font-size: clamp(30px, 8.6vw, 40px); }
  .hero-flow-line { font-size: 22px; padding: 12px 14px; }
  .hero-solution-line { font-size: 34px; }
  .header-cta { display: none; }
  .hero-actions { display: grid; }
  .section, .contact { padding: 64px 20px; }
  .hero { padding: 48px 20px; }
}