:root {
  --brand: #e71d2b;
  --brand-dark: #bb101d;
  --ink: #111827;
  --muted: #667085;
  --line: #e5e7eb;
  --soft: #f5f7fa;
  --navy: #071525;
  --navy-2: #102844;
  --white: #ffffff;
  --radius: 18px;
  --shadow: 0 24px 70px rgba(15, 23, 42, .12);
  --container: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: #fff;
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", Arial, sans-serif;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button, input, textarea, select { font: inherit; }
.container { width: min(calc(100% - 40px), var(--container)); margin: 0 auto; }
.skip-link { position: fixed; left: 16px; top: -80px; z-index: 1000; background: #fff; padding: 10px 14px; }
.skip-link:focus { top: 16px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,.92);
  border-bottom: 1px solid rgba(229,231,235,.85);
  backdrop-filter: blur(16px);
}
.header-inner { height: 74px; display: flex; align-items: center; gap: 34px; }
.brand { display: inline-flex; align-items: center; flex: 0 0 auto; }
.brand img { width: 184px; height: auto; }
.nav { margin-left: auto; display: flex; align-items: center; gap: 30px; }
.nav a { position: relative; color: #344054; font-size: 15px; font-weight: 600; }
.nav a:hover, .nav a.active { color: var(--brand); }
.nav a.active::after { content: ""; position: absolute; left: 0; right: 0; bottom: -25px; height: 2px; background: var(--brand); }
.header-cta, .btn { display: inline-flex; align-items: center; justify-content: center; gap: 9px; border-radius: 10px; font-weight: 700; transition: .2s ease; }
.header-cta { min-height: 42px; padding: 0 18px; color: #fff; background: var(--brand); font-size: 14px; }
.header-cta:hover, .btn-primary:hover { background: var(--brand-dark); transform: translateY(-1px); }
.menu-toggle { display: none; margin-left: auto; width: 42px; height: 42px; border: 0; background: transparent; padding: 10px; }
.menu-toggle span { display: block; height: 2px; background: #111827; margin: 5px 0; transition: .2s; }

.hero {
  position: relative;
  overflow: hidden;
  min-height: 720px;
  color: #fff;
  background: var(--navy);
}
.hero::before { content: ""; position: absolute; inset: 0; background-image: linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px); background-size: 48px 48px; mask-image: linear-gradient(to bottom, #000, transparent 82%); }
.hero::after { content: ""; position: absolute; width: 620px; height: 620px; right: -180px; top: -260px; border-radius: 50%; background: radial-gradient(circle, rgba(231,29,43,.28), rgba(231,29,43,0) 68%); }
.hero-inner { position: relative; z-index: 2; display: grid; grid-template-columns: 1.02fr .98fr; align-items: center; gap: 70px; min-height: 720px; padding: 70px 0; }
.hero-copy h1 { margin: 0 0 24px; max-width: 650px; font-size: clamp(48px, 5vw, 72px); line-height: 1.08; letter-spacing: -.045em; }
.hero-copy h1 em { color: #ff4d58; font-style: normal; }
.hero-copy p { max-width: 590px; margin: 0 0 34px; color: #c7d3e2; font-size: 18px; line-height: 1.9; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; }
.btn { min-height: 50px; padding: 0 24px; border: 1px solid transparent; cursor: pointer; }
.btn-primary { color: #fff; background: var(--brand); }
.btn-ghost { color: #fff; border-color: rgba(255,255,255,.28); background: rgba(255,255,255,.04); }
.btn-ghost:hover { border-color: #fff; background: rgba(255,255,255,.08); }
.btn-light { color: var(--ink); background: #fff; }
.btn-outline { color: var(--brand); border-color: #f0a4aa; background: #fff; }
.hero-note { margin-top: 25px; display: flex; align-items: center; gap: 10px; color: #91a4ba; font-size: 13px; }
.hero-note::before { content: ""; width: 20px; height: 1px; background: #637b96; }

.ai-console { position: relative; padding: 18px; border: 1px solid rgba(255,255,255,.15); border-radius: 24px; background: rgba(17, 38, 62, .76); box-shadow: 0 36px 100px rgba(0,0,0,.34); backdrop-filter: blur(14px); }
.console-top { display: flex; align-items: center; justify-content: space-between; padding: 2px 4px 16px; color: #a9b9cb; font-size: 12px; }
.console-dots { display: flex; gap: 6px; }
.console-dots i { width: 7px; height: 7px; border-radius: 50%; background: #5c7289; }
.console-dots i:first-child { background: var(--brand); }
.console-screen { padding: 24px; border-radius: 16px; background: #f8fafc; color: var(--ink); }
.console-title { display: flex; align-items: center; justify-content: space-between; margin-bottom: 24px; }
.console-title strong { font-size: 17px; }
.status-live { display: flex; align-items: center; gap: 7px; color: #147a4b; font-size: 12px; }
.status-live i { width: 7px; height: 7px; border-radius: 50%; background: #21b66f; box-shadow: 0 0 0 5px rgba(33,182,111,.12); }
.flow { display: grid; gap: 12px; }
.flow-row { display: grid; grid-template-columns: 38px 1fr auto; align-items: center; gap: 13px; padding: 14px; border: 1px solid #e6eaf0; border-radius: 12px; background: #fff; }
.flow-icon { width: 38px; height: 38px; display: grid; place-items: center; color: var(--brand); border-radius: 10px; background: #fff1f2; font-weight: 800; }
.flow-row strong { display: block; font-size: 14px; }
.flow-row small { color: #8a94a4; }
.flow-state { color: #5b6878; font-size: 12px; }
.console-result { margin-top: 17px; padding: 16px 18px; color: #dfeafa; border-radius: 13px; background: #0c2138; }
.console-result span { display: block; margin-bottom: 5px; color: #8ca3bb; font-size: 12px; }
.console-result strong { font-size: 15px; }

.brand-rail { border-bottom: 1px solid var(--line); background: #fff; }
.brand-rail-inner { display: grid; grid-template-columns: 1.3fr repeat(4, 1fr); align-items: center; min-height: 112px; }
.rail-title { color: #344054; font-weight: 700; }
.rail-item { padding-left: 30px; border-left: 1px solid var(--line); }
.rail-item strong { display: block; font-size: 15px; }
.rail-item span { color: var(--muted); font-size: 12px; }

.section { padding: 110px 0; }
.section-soft { background: var(--soft); }
.section-dark { color: #fff; background: var(--navy); }
.section-head { display: grid; grid-template-columns: .82fr 1.18fr; gap: 60px; align-items: end; margin-bottom: 54px; }
.section-head h2 { margin: 0; font-size: clamp(34px, 4vw, 52px); line-height: 1.18; letter-spacing: -.035em; }
.section-head p { margin: 0; color: var(--muted); font-size: 17px; }
.section-dark .section-head p { color: #aab9c9; }
.section-index { display: block; margin-bottom: 15px; color: var(--brand); font-size: 13px; font-weight: 800; letter-spacing: .14em; }

.service-list { border-top: 1px solid var(--line); }
.service-item { display: grid; grid-template-columns: 84px 1fr 1.2fr 32px; gap: 30px; align-items: center; padding: 30px 8px; border-bottom: 1px solid var(--line); transition: .2s ease; }
.service-item:hover { padding-left: 18px; background: #fafafa; }
.service-no { color: var(--brand); font-size: 13px; font-weight: 800; }
.service-item h3 { margin: 0; font-size: 22px; }
.service-item p { margin: 0; color: var(--muted); }
.arrow { width: 30px; height: 30px; color: var(--ink); transition: .2s; }
.service-item:hover .arrow { transform: translate(4px,-4px); color: var(--brand); }

.scenario-layout { display: grid; grid-template-columns: 320px 1fr; gap: 60px; align-items: start; }
.scenario-tabs { display: grid; gap: 5px; }
.scenario-tab { display: flex; justify-content: space-between; align-items: center; width: 100%; padding: 18px 20px; color: #a9b8c9; border: 0; border-left: 2px solid #27415f; background: transparent; text-align: left; cursor: pointer; }
.scenario-tab.active { color: #fff; border-left-color: var(--brand); background: rgba(255,255,255,.06); }
.scenario-tab b { font-size: 15px; }
.scenario-tab span { color: #71879f; font-size: 12px; }
.scenario-panel { min-height: 440px; padding: 50px; border: 1px solid rgba(255,255,255,.12); border-radius: 22px; background: linear-gradient(145deg, rgba(255,255,255,.08), rgba(255,255,255,.025)); }
.scenario-panel h3 { margin: 0 0 18px; font-size: 34px; }
.scenario-panel > p { max-width: 650px; color: #b8c5d3; font-size: 16px; }
.scenario-points { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; margin-top: 36px; }
.scenario-point { min-height: 120px; padding: 20px; border-top: 1px solid rgba(255,255,255,.18); }
.scenario-point strong { display: block; margin-bottom: 8px; }
.scenario-point span { color: #91a5ba; font-size: 13px; }

.method-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; border-top: 1px solid var(--line); }
.method-step { position: relative; padding: 34px 30px 16px 0; border-right: 1px solid var(--line); }
.method-step + .method-step { padding-left: 30px; }
.method-step:last-child { border-right: 0; }
.method-step i { display: block; margin-bottom: 45px; color: var(--brand); font-size: 13px; font-style: normal; font-weight: 800; }
.method-step h3 { margin: 0 0 13px; font-size: 20px; }
.method-step p { margin: 0; color: var(--muted); font-size: 14px; }

.case-feature { display: grid; grid-template-columns: 1.08fr .92fr; overflow: hidden; border-radius: 24px; background: #fff; box-shadow: var(--shadow); }
.case-visual { position: relative; min-height: 440px; padding: 42px; color: #fff; background: #0b213a; }
.case-visual::before { content: ""; position: absolute; inset: 0; background: radial-gradient(circle at 85% 15%, rgba(231,29,43,.36), transparent 36%), linear-gradient(120deg, transparent 45%, rgba(255,255,255,.04) 45% 46%, transparent 46%); }
.case-stack { position: relative; z-index: 1; height: 100%; display: flex; flex-direction: column; justify-content: space-between; }
.case-stack small { color: #9fb2c7; }
.case-stack blockquote { margin: 0; font-size: 30px; line-height: 1.45; font-weight: 700; }
.case-copy { padding: 54px; }
.case-copy h3 { margin: 0 0 18px; font-size: 28px; }
.case-copy p { color: var(--muted); }
.result-list { margin: 30px 0 36px; padding: 0; list-style: none; }
.result-list li { position: relative; padding: 13px 0 13px 26px; border-bottom: 1px solid var(--line); }
.result-list li::before { content: ""; position: absolute; left: 0; top: 23px; width: 8px; height: 8px; border-radius: 50%; background: var(--brand); }

.insight-grid { display: grid; grid-template-columns: 1.2fr .8fr .8fr; gap: 20px; }
.insight-card { min-height: 330px; display: flex; flex-direction: column; padding: 30px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; transition: .2s; }
.insight-card:hover { transform: translateY(-5px); box-shadow: var(--shadow); }
.insight-card.featured { color: #fff; border-color: transparent; background: var(--navy); }
.insight-card time { color: #8993a2; font-size: 12px; }
.insight-card h3 { margin: 60px 0 16px; font-size: 23px; line-height: 1.45; }
.insight-card.featured h3 { font-size: 30px; }
.insight-card p { margin: 0; color: var(--muted); font-size: 14px; }
.insight-card.featured p { color: #aab9c9; }
.insight-link { margin-top: auto; padding-top: 28px; color: var(--brand); font-weight: 700; }

.cta-band { position: relative; overflow: hidden; padding: 82px 0; color: #fff; background: var(--brand); }
.cta-band::after { content: "AI"; position: absolute; right: 6%; top: -72px; color: rgba(255,255,255,.09); font-size: 260px; line-height: 1; font-weight: 900; }
.cta-inner { position: relative; z-index: 1; display: flex; align-items: center; justify-content: space-between; gap: 40px; }
.cta-inner h2 { margin: 0 0 12px; font-size: 40px; }
.cta-inner p { margin: 0; color: rgba(255,255,255,.82); }

.site-footer { color: #a8b5c4; background: #050f1c; }
.footer-main { display: grid; grid-template-columns: 1.4fr repeat(3, .7fr); gap: 56px; padding: 70px 0 46px; }
.footer-brand img { width: 190px; filter: brightness(0) invert(1); opacity: .92; }
.footer-brand p { max-width: 340px; margin: 22px 0; color: #8292a5; font-size: 14px; }
.footer-phone { color: #fff; font-size: 24px; font-weight: 800; }
.footer-col h4 { margin: 0 0 18px; color: #fff; }
.footer-col a { display: block; padding: 5px 0; color: #8292a5; font-size: 14px; }
.footer-col a:hover { color: #fff; }
.footer-bottom { display: flex; justify-content: space-between; gap: 20px; padding: 22px 0; border-top: 1px solid rgba(255,255,255,.1); color: #687a8e; font-size: 12px; }

.page-hero { position: relative; overflow: hidden; padding: 100px 0 90px; color: #fff; background: var(--navy); }
.page-hero::after { content: ""; position: absolute; right: -140px; top: -260px; width: 560px; height: 560px; border-radius: 50%; background: radial-gradient(circle, rgba(231,29,43,.3), transparent 67%); }
.page-hero .container { position: relative; z-index: 1; }
.page-hero h1 { max-width: 860px; margin: 0 0 24px; font-size: clamp(42px, 5vw, 66px); line-height: 1.15; letter-spacing: -.04em; }
.page-hero p { max-width: 720px; margin: 0; color: #b8c6d6; font-size: 18px; }
.breadcrumb { margin-bottom: 32px; color: #7f95ac; font-size: 13px; }
.breadcrumb a { color: #b8c6d6; }

.content-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.content-card { padding: 32px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; }
.content-card .num { color: var(--brand); font-size: 13px; font-weight: 800; }
.content-card h2, .content-card h3 { margin: 42px 0 14px; line-height: 1.4; }
.content-card p { margin: 0; color: var(--muted); }
.content-card ul { padding-left: 20px; color: var(--muted); }
.content-card li { margin: 8px 0; }
.wide-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.process-line { border-left: 1px solid var(--line); }
.process-row { position: relative; padding: 0 0 42px 42px; }
.process-row::before { content: ""; position: absolute; left: -6px; top: 8px; width: 11px; height: 11px; border: 2px solid var(--brand); border-radius: 50%; background: #fff; }
.process-row h3 { margin: 0 0 8px; }
.process-row p { margin: 0; color: var(--muted); }
.article-list { border-top: 1px solid var(--line); }
.article-row { display: grid; grid-template-columns: 130px 1fr auto; gap: 30px; align-items: center; padding: 28px 0; border-bottom: 1px solid var(--line); }
.article-row time { color: #8a94a4; font-size: 13px; }
.article-row h2 { margin: 0 0 6px; font-size: 21px; }
.article-row p { margin: 0; color: var(--muted); font-size: 14px; }
.tag { color: var(--brand); font-size: 13px; font-weight: 700; }
.contact-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 70px; }
.contact-info h2 { margin-top: 0; font-size: 38px; }
.contact-info p { color: var(--muted); }
.contact-block { padding: 22px 0; border-bottom: 1px solid var(--line); }
.contact-block span { display: block; color: var(--muted); font-size: 12px; }
.contact-block strong { font-size: 20px; }
.contact-form { padding: 40px; border-radius: 22px; background: var(--soft); }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.field { display: grid; gap: 8px; }
.field.full { grid-column: 1 / -1; }
.field label { font-size: 13px; font-weight: 700; }
.field input, .field textarea, .field select { width: 100%; border: 1px solid #dce1e8; border-radius: 10px; background: #fff; padding: 13px 14px; outline: none; }
.field input:focus, .field textarea:focus, .field select:focus { border-color: var(--brand); box-shadow: 0 0 0 3px rgba(231,29,43,.08); }
.field textarea { min-height: 130px; resize: vertical; }
.form-tip { color: var(--muted); font-size: 12px; }
.form-success { display: none; padding: 16px; color: #166534; border: 1px solid #bbf7d0; border-radius: 10px; background: #f0fdf4; }
.form-success.show { display: block; }

.contact-panel {
  position: relative;
  overflow: hidden;
  min-height: 520px;
  padding: 52px;
  color: #fff;
  border-radius: 24px;
  background: var(--navy);
  box-shadow: var(--shadow);
}
.contact-panel::after {
  content: "AI";
  position: absolute;
  right: -28px;
  top: -58px;
  color: rgba(255,255,255,.035);
  font-size: 210px;
  line-height: 1;
  font-weight: 900;
}
.contact-panel > * { position: relative; z-index: 1; }
.contact-panel h2 { max-width: 520px; margin: 0 0 16px; font-size: 38px; line-height: 1.25; }
.contact-panel > p { max-width: 520px; margin: 0; color: #aebed0; }
.contact-direct { margin: 42px 0 36px; padding: 25px 0; border-top: 1px solid rgba(255,255,255,.14); border-bottom: 1px solid rgba(255,255,255,.14); }
.contact-direct span { display: block; margin-bottom: 7px; color: #8298af; font-size: 12px; }
.contact-direct a { color: #fff; font-size: clamp(34px, 4vw, 50px); line-height: 1; font-weight: 800; letter-spacing: -.03em; }
.contact-panel-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.contact-route { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; margin-top: 44px; border-top: 1px solid var(--line); }
.contact-route article { padding: 30px 26px 10px 0; }
.contact-route article + article { padding-left: 26px; border-left: 1px solid var(--line); }
.contact-route span { color: var(--brand); font-size: 12px; font-weight: 800; }
.contact-route h3 { margin: 28px 0 10px; font-size: 20px; }
.contact-route p { margin: 0; color: var(--muted); font-size: 14px; }

.mobile-call { display: none; }
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }

@media (max-width: 980px) {
  .nav, .header-cta { display: none; }
  .menu-toggle { display: block; }
  .nav.open { position: absolute; display: grid; left: 0; right: 0; top: 74px; padding: 18px 20px 24px; gap: 0; border-bottom: 1px solid var(--line); background: #fff; box-shadow: 0 18px 40px rgba(15,23,42,.1); }
  .nav.open a { padding: 14px 4px; border-bottom: 1px solid #f0f1f3; }
  .nav a.active::after { display: none; }
  .hero-inner { grid-template-columns: 1fr; padding: 85px 0 70px; }
  .hero { min-height: auto; }
  .hero-inner { min-height: auto; }
  .ai-console { max-width: 680px; }
  .brand-rail-inner { grid-template-columns: repeat(2, 1fr); padding: 22px 0; }
  .rail-title { grid-column: 1 / -1; padding-bottom: 16px; }
  .rail-item { padding: 15px 20px 15px 0; border-left: 0; }
  .section-head { grid-template-columns: 1fr; gap: 20px; }
  .scenario-layout { grid-template-columns: 1fr; gap: 28px; }
  .scenario-tabs { grid-template-columns: repeat(4, 1fr); }
  .scenario-tab { display: block; padding: 14px 10px; border-left: 0; border-bottom: 2px solid #27415f; }
  .scenario-tab.active { border-bottom-color: var(--brand); }
  .scenario-tab span { display: none; }
  .method-grid { grid-template-columns: repeat(2, 1fr); }
  .method-step:nth-child(2) { border-right: 0; }
  .case-feature { grid-template-columns: 1fr; }
  .insight-grid, .content-grid { grid-template-columns: 1fr 1fr; }
  .insight-card.featured { grid-column: 1 / -1; }
  .footer-main { grid-template-columns: 1.2fr 1fr 1fr; }
  .footer-col:last-child { display: none; }
}

@media (max-width: 680px) {
  .container { width: min(calc(100% - 28px), var(--container)); }
  .header-inner { height: 64px; }
  .brand img { width: 150px; }
  .nav.open { top: 64px; }
  .hero-inner { gap: 46px; padding: 62px 0 54px; }
  .hero-copy h1 { font-size: 42px; }
  .hero-copy p { font-size: 16px; }
  .hero-actions .btn { flex: 1 1 150px; padding: 0 14px; }
  .ai-console { margin: 0 -2px; padding: 10px; border-radius: 17px; }
  .console-screen { padding: 16px; }
  .flow-row { grid-template-columns: 34px 1fr; }
  .flow-state { display: none; }
  .section { padding: 76px 0; }
  .section-head { margin-bottom: 36px; }
  .section-head h2 { font-size: 34px; }
  .brand-rail-inner { grid-template-columns: 1fr 1fr; }
  .service-item { grid-template-columns: 44px 1fr 26px; gap: 12px; }
  .service-item p { grid-column: 2 / -1; }
  .scenario-tabs { display: flex; overflow-x: auto; }
  .scenario-tab { min-width: 110px; }
  .scenario-panel { min-height: auto; padding: 28px 22px; }
  .scenario-panel h3 { font-size: 27px; }
  .scenario-points { grid-template-columns: 1fr; }
  .method-grid, .insight-grid, .content-grid, .wide-grid { grid-template-columns: 1fr; }
  .method-step, .method-step + .method-step { padding: 28px 8px; border-right: 0; border-bottom: 1px solid var(--line); }
  .method-step i { margin-bottom: 20px; }
  .case-visual { min-height: 330px; padding: 28px; }
  .case-stack blockquote { font-size: 24px; }
  .case-copy { padding: 30px 24px; }
  .insight-card, .insight-card.featured { min-height: 280px; grid-column: auto; }
  .cta-band { padding: 62px 0; }
  .cta-inner { display: block; }
  .cta-inner h2 { font-size: 32px; }
  .cta-inner .btn { margin-top: 28px; }
  .footer-main { grid-template-columns: 1fr 1fr; gap: 38px; padding-top: 52px; }
  .footer-brand { grid-column: 1 / -1; }
  .footer-bottom { display: block; padding-bottom: 82px; }
  .footer-bottom span { display: block; margin-top: 7px; }
  .page-hero { padding: 70px 0 64px; }
  .page-hero h1 { font-size: 40px; }
  .page-hero p { font-size: 16px; }
  .article-row { grid-template-columns: 1fr auto; gap: 12px; }
  .article-row time { grid-column: 1 / -1; }
  .article-row p { display: none; }
  .article-row h2 { font-size: 18px; }
  .contact-layout { grid-template-columns: 1fr; gap: 40px; }
  .contact-form { padding: 25px 20px; }
  .contact-panel { min-height: auto; padding: 34px 24px; }
  .contact-panel h2 { font-size: 30px; }
  .contact-route { grid-template-columns: 1fr; }
  .contact-route article, .contact-route article + article { padding: 24px 0; border-left: 0; border-bottom: 1px solid var(--line); }
  .contact-route h3 { margin-top: 12px; }
  .form-grid { grid-template-columns: 1fr; }
  .field.full { grid-column: auto; }
  .mobile-call { position: fixed; z-index: 90; display: grid; place-items: center; left: 14px; right: 14px; bottom: 12px; height: 52px; color: #fff; border-radius: 12px; background: var(--brand); box-shadow: 0 14px 35px rgba(183,15,29,.34); font-weight: 800; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; animation: none !important; }
  .reveal { opacity: 1; transform: none; }
}