:root {
  --red: #e83f43;
  --red-dark: #c72c31;
  --red-soft: #fff0ef;
  --ink: #171515;
  --muted: #6e6967;
  --line: #e8e2df;
  --paper: #fbf8f5;
  --white: #ffffff;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; }
button, summary { -webkit-tap-highlight-color: transparent; }
main { overflow: hidden; }

.site-header {
  height: 78px;
  padding: 0 5vw;
  display: flex;
  align-items: center;
  gap: 28px;
  position: absolute;
  inset: 0 0 auto;
  z-index: 20;
  color: white;
  border-bottom: 1px solid rgba(255,255,255,.11);
}
.brand { display: flex; align-items: center; gap: 11px; min-width: 215px; }
.brand img { border-radius: 12px; object-fit: contain; background: white; }
.brand-copy { display: grid; gap: 2px; }
.brand-copy strong { font-size: 18px; letter-spacing: .12em; }
.brand-copy small { font-size: 8px; letter-spacing: .18em; opacity: .55; }
.nav { display: flex; align-items: center; gap: 34px; margin: 0 auto; }
.nav a { font-size: 14px; color: rgba(255,255,255,.72); transition: .2s; }
.nav a:hover { color: white; }
.header-cta { font-size: 14px; border: 1px solid rgba(255,255,255,.28); padding: 10px 16px; border-radius: 100px; }
.header-cta span { color: var(--red); margin-left: 8px; }
.menu-button { display: none; }

.hero {
  min-height: 790px;
  position: relative;
  color: white;
  background:
    radial-gradient(circle at 80% 35%, rgba(232,63,67,.22), transparent 29%),
    linear-gradient(118deg, #141212 0%, #1e1817 57%, #251719 100%);
  display: grid;
  grid-template-columns: 1.08fr .92fr;
  padding: 158px 7vw 88px;
}
.hero-grid {
  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: 68px 68px;
  mask-image: linear-gradient(to right, transparent, black 40%, black);
}
.hero::after { content: ""; position: absolute; width: 420px; height: 420px; border: 1px solid rgba(255,255,255,.07); border-radius: 50%; right: -180px; top: 160px; }
.hero-content { position: relative; z-index: 2; max-width: 760px; }
.eyebrow, .section-kicker { display: flex; align-items: center; gap: 10px; font-size: 11px; font-weight: 700; letter-spacing: .2em; color: var(--red); }
.eyebrow span { width: 26px; height: 2px; background: var(--red); }
.hero h1 { font-size: clamp(46px, 5.1vw, 76px); line-height: 1.16; letter-spacing: -.055em; margin: 30px 0 28px; font-weight: 650; }
.hero h1 em, .section h2 em, .contact h2 em { font-style: normal; color: var(--red); }
.hero-lead { font-size: 17px; line-height: 1.9; color: rgba(255,255,255,.66); max-width: 660px; }
.hero-actions { display: flex; gap: 13px; margin-top: 38px; }
.button { border: 0; cursor: pointer; min-height: 52px; display: inline-flex; justify-content: center; align-items: center; gap: 30px; padding: 0 26px; font-weight: 650; font-size: 14px; border-radius: 3px; transition: transform .2s, background .2s; }
.button:hover { transform: translateY(-2px); }
.button-primary { background: var(--red); color: white; box-shadow: 0 12px 36px rgba(232,63,67,.22); }
.button-primary:hover { background: var(--red-dark); }
.button-ghost { color: white; border: 1px solid rgba(255,255,255,.28); }
.hero-proof { margin-top: 45px; display: flex; align-items: center; gap: 13px; color: rgba(255,255,255,.5); font-size: 12px; }
.hero-proof b { color: rgba(255,255,255,.8); font-weight: 500; }
.hero-proof i { width: 3px; height: 3px; border-radius: 50%; background: var(--red); }

.hero-visual { position: relative; z-index: 2; min-height: 510px; align-self: center; }
.core-node { position: absolute; left: 49%; top: 47%; transform: translate(-50%,-50%); width: 230px; height: 230px; border-radius: 50%; display: grid; place-content: center; justify-items: center; gap: 11px; background: radial-gradient(circle, rgba(232,63,67,.2), rgba(232,63,67,.03) 58%, transparent 59%); border: 1px solid rgba(232,63,67,.32); box-shadow: 0 0 80px rgba(232,63,67,.12); }
.core-node::before, .core-node::after { content: ""; position: absolute; border-radius: 50%; border: 1px solid rgba(255,255,255,.1); inset: -52px; }
.core-node::after { inset: -106px; border-style: dashed; animation: spin 34s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.core-node img { border-radius: 23px; box-shadow: 0 14px 44px rgba(0,0,0,.3); }
.core-node span { font-size: 11px; color: rgba(255,255,255,.57); letter-spacing: .12em; }
.signal-card { position: absolute; min-width: 218px; padding: 16px; display: grid; grid-template-columns: 42px 1fr auto; align-items: center; gap: 12px; background: rgba(29,25,25,.8); border: 1px solid rgba(255,255,255,.13); backdrop-filter: blur(10px); box-shadow: 0 18px 55px rgba(0,0,0,.25); }
.signal-card::after { content: ""; position: absolute; height: 1px; width: 94px; background: linear-gradient(90deg, rgba(232,63,67,.7), transparent); }
.card-ai { right: 1%; top: 13%; }
.card-ai::after { left: -94px; top: 50%; }
.card-agent { left: 0; bottom: 14%; }
.card-agent::after { right: -94px; top: 50%; transform: rotate(180deg); }
.signal-icon { width: 42px; height: 42px; display: grid; place-items: center; border-radius: 50%; background: rgba(232,63,67,.12); color: var(--red); font-size: 12px; font-weight: 800; }
.signal-card div { display: grid; gap: 4px; }
.signal-card small { font-size: 8px; letter-spacing: .1em; color: rgba(255,255,255,.4); }
.signal-card strong { font-size: 14px; }
.signal-card > b { color: var(--red); font-size: 11px; }
.visual-caption { position: absolute; right: 0; bottom: 0; color: rgba(255,255,255,.4); font-size: 10px; letter-spacing: .06em; display: flex; align-items: center; gap: 12px; }
.visual-caption span { color: var(--red); }

.shift-strip { min-height: 112px; background: white; padding: 24px 7vw; display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid var(--line); }
.shift-strip > div:first-child { display: grid; grid-template-columns: auto auto; gap: 4px 10px; align-items: center; }
.shift-strip strong { font-size: 15px; }
.shift-strip p { grid-column: 2; margin: 0; font-size: 12px; color: var(--muted); }
.pulse { width: 9px; height: 9px; background: var(--red); border-radius: 50%; box-shadow: 0 0 0 6px var(--red-soft); }
.platforms { display: flex; gap: 24px; color: #9a9490; font-size: 12px; font-weight: 650; }

.section { padding: 115px 7vw; }
.section-heading { display: grid; grid-template-columns: 1fr .65fr; align-items: end; gap: 80px; margin-bottom: 62px; }
.section-kicker { margin-bottom: 20px; }
.section-kicker::before { content: ""; width: 20px; height: 1px; background: currentColor; }
.section-heading h2, .process-title h2, .faq-title h2 { font-size: clamp(38px, 4vw, 58px); line-height: 1.18; letter-spacing: -.045em; margin: 0; }
.section-heading > p, .advantage-intro > p, .faq-title > p { color: var(--muted); line-height: 1.9; font-size: 14px; max-width: 510px; }

.services { background: var(--paper); }
.service-list { border-top: 1px solid #dcd5d1; }
.service-card { min-height: 245px; display: grid; grid-template-columns: 80px 1.3fr .8fr 54px; align-items: center; gap: 38px; padding: 38px 0; border-bottom: 1px solid #dcd5d1; transition: .25s; }
.service-card:hover { padding-left: 22px; padding-right: 22px; background: white; box-shadow: 0 18px 60px rgba(39,29,27,.06); }
.service-number { font-family: Georgia, serif; font-size: 48px; color: #d1c9c4; font-style: italic; }
.service-tag { display: inline-block; color: var(--red); background: var(--red-soft); border-radius: 100px; padding: 6px 10px; font-size: 9px; font-weight: 800; letter-spacing: .12em; }
.service-main h3 { font-size: 26px; margin: 14px 0 11px; letter-spacing: -.02em; }
.service-main p { color: var(--muted); line-height: 1.8; font-size: 13px; margin: 0; max-width: 580px; }
.service-card ul { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 13px; font-size: 12px; }
.service-card li { display: flex; gap: 8px; align-items: center; }
.service-card li span { color: var(--red); }
.service-card > a { width: 46px; height: 46px; display: grid; place-items: center; border: 1px solid var(--line); border-radius: 50%; color: var(--red); }

.advantages { background: #1a1717; color: white; display: grid; grid-template-columns: .8fr 1.2fr; gap: 90px; position: relative; }
.advantages::before { content: "YIHOU"; position: absolute; bottom: -25px; left: 2vw; font-size: 15vw; font-weight: 800; color: rgba(255,255,255,.025); letter-spacing: -.08em; }
.section-kicker.light { color: #fa7477; }
.advantage-intro { align-self: center; position: relative; z-index: 1; }
.advantage-intro h2 { font-size: clamp(36px, 3.6vw, 54px); line-height: 1.24; margin: 0 0 25px; letter-spacing: -.04em; }
.advantage-intro > p { color: rgba(255,255,255,.48); }
.advantage-intro > a { display: inline-flex; gap: 60px; align-items: center; margin-top: 25px; padding-bottom: 8px; border-bottom: 1px solid rgba(255,255,255,.25); font-size: 13px; }
.advantage-intro > a span { color: var(--red); }
.advantage-grid { display: grid; grid-template-columns: 1fr 1fr; position: relative; z-index: 1; }
.advantage-grid article { min-height: 250px; padding: 35px; border-left: 1px solid rgba(255,255,255,.1); border-bottom: 1px solid rgba(255,255,255,.1); }
.advantage-grid article:nth-child(3), .advantage-grid article:nth-child(4) { border-bottom: 0; }
.advantage-grid article span { font-family: Georgia, serif; color: var(--red); font-size: 13px; }
.advantage-grid h3 { margin: 55px 0 12px; font-size: 19px; }
.advantage-grid p { color: rgba(255,255,255,.45); line-height: 1.8; font-size: 12px; }

.industries { background: white; }
.section-heading.compact { margin-bottom: 50px; }
.industry-grid { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.industry-grid article { min-height: 190px; padding: 28px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); display: flex; flex-direction: column; position: relative; transition: .22s; }
.industry-grid article:hover { background: var(--red); color: white; transform: translateY(-4px); z-index: 2; box-shadow: 0 18px 45px rgba(199,44,49,.2); }
.industry-grid article > span { color: #bbb1ac; font-family: Georgia, serif; font-style: italic; font-size: 12px; }
.industry-grid article div { margin-top: auto; }
.industry-grid h3 { margin: 0 0 8px; font-size: 18px; }
.industry-grid p { margin: 0; color: var(--muted); font-size: 12px; }
.industry-grid article:hover p, .industry-grid article:hover > span { color: rgba(255,255,255,.65); }
.industry-grid b { position: absolute; right: 25px; top: 25px; font-weight: 400; color: var(--red); }
.industry-grid article:hover b { color: white; }

.process { background: var(--paper); display: grid; grid-template-columns: .55fr 1.45fr; gap: 85px; }
.process-title h2 { font-size: clamp(36px, 3.7vw, 54px); }
.process-line { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid #d8d0cc; margin-top: 39px; }
.process-line article { padding: 44px 22px 0 0; position: relative; }
.process-dot { position: absolute; top: -7px; left: 0; width: 14px; height: 14px; border: 1px solid var(--red); border-radius: 50%; display: grid; place-items: center; background: var(--paper); }
.process-dot i { width: 4px; height: 4px; background: var(--red); border-radius: 50%; }
.process-line small { color: var(--red); font-size: 9px; font-weight: 800; letter-spacing: .1em; }
.process-line h3 { font-size: 18px; margin: 20px 0 13px; }
.process-line p { font-size: 12px; line-height: 1.8; color: var(--muted); }

.insight { background: var(--red); color: white; text-align: center; padding-top: 85px; padding-bottom: 85px; position: relative; }
.insight-quote { font-family: Georgia, serif; font-size: 100px; line-height: .5; opacity: .25; }
.insight > p { font-size: clamp(28px, 3.3vw, 46px); line-height: 1.45; margin: 24px 0 30px; letter-spacing: -.03em; }
.insight em { font-style: normal; color: #241819; }
.insight > div:last-child { display: flex; justify-content: center; gap: 12px; align-items: center; font-size: 11px; color: rgba(255,255,255,.68); }
.insight > div span { color: white; font-weight: 700; }
.insight > div i { width: 28px; height: 1px; background: rgba(255,255,255,.4); }

.latest-content { background: var(--paper); }
.content-heading-side { align-self: end; }
.content-heading-side p { color: var(--muted); line-height: 1.9; font-size: 14px; margin: 0 0 18px; }
.content-heading-side a { color: var(--red); font-size: 12px; padding-bottom: 7px; border-bottom: 1px solid rgba(232,63,67,.35); }
.latest-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 18px; }
.latest-grid > a { min-height: 300px; background: white; border: 1px solid var(--line); padding: 28px; display: flex; flex-direction: column; transition: .22s; }
.latest-grid > a:hover { transform: translateY(-5px); box-shadow: 0 20px 55px rgba(45,30,28,.08); }
.latest-grid > a > div { display: flex; justify-content: space-between; align-items: center; }
.latest-grid > a > div span { color: var(--red); font-size: 9px; font-weight: 800; letter-spacing: .12em; }
.latest-grid > a > div b { font-family: Georgia,serif; font-size: 35px; color: #eee8e4; font-style: italic; }
.latest-grid h3 { font-size: 21px; line-height: 1.5; margin: 38px 0 14px; }
.latest-grid p { color: var(--muted); line-height: 1.8; font-size: 12px; margin: 0; }
.latest-grid footer { margin-top: auto; padding-top: 19px; border-top: 1px solid #eee9e6; display: flex; justify-content: space-between; font-size: 10px; }
.latest-grid footer time { color: #a49c98; }.latest-grid footer strong { color: var(--red); font-weight: 500; }
.content-placeholder { min-height: 155px; border: 1px dashed #d5cdc9; background: white; display: grid; grid-template-columns: 55px 1fr auto; align-items: center; gap: 22px; padding: 30px; }
.content-placeholder > span { width: 52px; height: 52px; display: grid; place-items: center; border-radius: 50%; background: var(--red-soft); color: var(--red); font-size: 22px; }
.content-placeholder h3 { margin: 0 0 8px; }.content-placeholder p { margin: 0; color: var(--muted); font-size: 12px; }.content-placeholder > b { color: var(--red); font-size: 12px; }

.faq { background: white; display: grid; grid-template-columns: .55fr 1.05fr; gap: 100px; }
.faq-title > p { margin-top: 24px; }
.faq-title > a { color: var(--red); font-family: Georgia, serif; font-size: 24px; display: inline-block; margin-top: 20px; }
.faq-list { border-top: 1px solid var(--line); }
.faq-list details { border-bottom: 1px solid var(--line); padding: 0 4px; }
.faq-list summary { min-height: 86px; cursor: pointer; display: grid; grid-template-columns: 42px 1fr auto; align-items: center; list-style: none; font-weight: 650; font-size: 15px; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary span { font-family: Georgia, serif; color: #bdb4af; font-size: 12px; }
.faq-list summary b { font-weight: 300; color: var(--red); font-size: 22px; transition: transform .2s; }
.faq-list details[open] summary b { transform: rotate(45deg); }
.faq-list details p { color: var(--muted); font-size: 13px; line-height: 1.85; margin: -8px 30px 28px 42px; }

.contact { padding: 105px 7vw; color: white; background: #1a1717; display: grid; grid-template-columns: .9fr 1.1fr; gap: 90px; }
.contact h2 { font-size: clamp(38px, 4vw, 58px); line-height: 1.24; letter-spacing: -.045em; margin: 0 0 24px; }
.contact-copy > p { color: rgba(255,255,255,.48); line-height: 1.9; font-size: 14px; max-width: 590px; }
.contact-person { display: flex; gap: 14px; align-items: center; margin-top: 40px; }
.contact-person > div { width: 47px; height: 47px; border: 1px solid rgba(255,255,255,.18); border-radius: 50%; display: grid; place-items: center; color: var(--red); }
.contact-person span { display: grid; gap: 4px; }
.contact-person small { color: rgba(255,255,255,.4); font-size: 10px; }
.contact-person strong { font-size: 14px; }
.contact-form { background: white; color: var(--ink); padding: 38px; display: grid; grid-template-columns: 1fr 1fr; gap: 24px 18px; }
.contact-form label { font-size: 11px; color: var(--muted); display: grid; gap: 9px; }
.contact-form input, .contact-form select, .contact-form textarea { width: 100%; border: 0; border-bottom: 1px solid #d8d1cd; padding: 0 0 11px; outline: none; background: transparent; color: var(--ink); border-radius: 0; font-size: 13px; resize: vertical; }
.contact-form input:focus, .contact-form select:focus, .contact-form textarea:focus { border-color: var(--red); }
.contact-form .full { grid-column: 1 / -1; }
.contact-form .button { width: 100%; }
.form-note { text-align: center; color: #aaa19d; font-size: 9px; }
.form-error { background: #fff0f0; color: #a42327; border: 1px solid #ffc8c8; padding: 10px 12px; font-size: 11px; }
.contact-form button:disabled { cursor: wait; opacity: .65; transform: none; }
.form-success { grid-column: 1 / -1; min-height: 330px; display: grid; place-content: center; justify-items: center; text-align: center; padding: 30px; }
.form-success > span { width: 54px; height: 54px; display: grid; place-items: center; border-radius: 50%; color: white; background: var(--red); font-size: 24px; }
.form-success h3 { font-size: 22px; margin: 20px 0 8px; }
.form-success p { color: var(--muted); font-size: 12px; line-height: 1.8; max-width: 380px; margin-bottom: 25px; }

footer { background: #111010; color: white; padding: 60px 7vw 25px; }
.footer-top { display: grid; grid-template-columns: 1fr 1fr .65fr; gap: 70px; align-items: center; padding-bottom: 45px; }
.footer-brand { min-width: 0; }
.footer-top > p { color: rgba(255,255,255,.42); font-size: 12px; line-height: 1.8; }
.footer-top > div:last-child { display: grid; gap: 7px; }
.footer-top > div:last-child small, .footer-top > div:last-child span { color: rgba(255,255,255,.4); font-size: 10px; }
.footer-top > div:last-child a { font-family: Georgia, serif; color: var(--red); font-size: 20px; }
.footer-bottom { padding-top: 22px; border-top: 1px solid rgba(255,255,255,.09); display: flex; justify-content: space-between; color: rgba(255,255,255,.3); font-size: 9px; }

@media (max-width: 1050px) {
  .site-header { padding-inline: 4vw; }
  .nav { gap: 18px; }
  .hero { grid-template-columns: 1fr; padding-inline: 6vw; }
  .hero-visual { position: absolute; right: 2vw; bottom: 50px; width: 42%; opacity: .44; }
  .hero-content { max-width: 760px; }
  .section, .contact { padding-inline: 6vw; }
  .advantages, .faq, .contact { gap: 45px; }
  .service-card { grid-template-columns: 60px 1.2fr .8fr 46px; gap: 20px; }
  .process { grid-template-columns: 1fr; gap: 35px; }
}

@media (max-width: 760px) {
  .site-header { height: 70px; padding: 0 20px; }
  .brand { min-width: 0; margin-right: auto; }
  .brand img { width: 40px; height: 40px; }
  .brand-copy strong { font-size: 16px; }
  .header-cta { display: none; }
  .menu-button { width: 42px; height: 42px; display: grid; align-content: center; gap: 6px; border: 0; background: transparent; padding: 10px; z-index: 3; }
  .menu-button span { height: 1px; width: 100%; background: white; }
  .nav { position: absolute; top: 69px; left: 0; right: 0; background: #191616; display: none; padding: 25px; align-items: stretch; flex-direction: column; gap: 0; border-bottom: 1px solid rgba(255,255,255,.1); }
  .nav.open { display: flex; }
  .nav a { padding: 14px 0; border-bottom: 1px solid rgba(255,255,255,.08); }
  .hero { min-height: auto; display: block; padding: 125px 22px 70px; }
  .hero-grid { background-size: 42px 42px; }
  .hero h1 { font-size: 42px; line-height: 1.2; margin-top: 24px; }
  .hero-lead { font-size: 14px; line-height: 1.8; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-proof { flex-wrap: wrap; }
  .hero-visual { position: relative; right: auto; bottom: auto; width: 100%; opacity: 1; min-height: 420px; margin-top: 28px; transform: scale(.9); }
  .card-ai { right: -7%; }
  .card-agent { left: -7%; }
  .shift-strip { align-items: flex-start; gap: 25px; flex-direction: column; padding: 25px 22px; }
  .platforms { flex-wrap: wrap; gap: 12px 20px; }
  .section { padding: 78px 22px; }
  .section-heading { grid-template-columns: 1fr; gap: 18px; margin-bottom: 38px; }
  .section-heading h2, .process-title h2, .faq-title h2 { font-size: 38px; }
  .service-card { grid-template-columns: 47px 1fr 40px; padding: 30px 0; gap: 12px; }
  .service-number { font-size: 30px; align-self: start; padding-top: 5px; }
  .service-card ul { grid-column: 2 / 4; }
  .service-card > a { grid-column: 3; grid-row: 1; width: 38px; height: 38px; }
  .service-main h3 { font-size: 20px; }
  .advantages { grid-template-columns: 1fr; gap: 45px; }
  .advantage-grid article { padding: 25px 18px; min-height: 210px; }
  .advantage-grid h3 { margin-top: 42px; }
  .industry-grid { grid-template-columns: 1fr 1fr; }
  .industry-grid article { min-height: 170px; padding: 22px; }
  .process-line { grid-template-columns: 1fr 1fr; row-gap: 45px; }
  .insight > p br { display: none; }
  .faq { grid-template-columns: 1fr; gap: 45px; }
  .latest-grid { grid-template-columns: 1fr; }
  .latest-grid > a { min-height: 260px; }
  .content-placeholder { grid-template-columns: 48px 1fr; }
  .content-placeholder > b { grid-column: 2; }
  .faq-list summary { font-size: 14px; }
  .contact { padding: 78px 22px; grid-template-columns: 1fr; gap: 45px; }
  .contact h2 { font-size: 38px; }
  .contact-form { padding: 26px 20px; grid-template-columns: 1fr; }
  .contact-form label, .contact-form .full { grid-column: 1; }
  .footer-top { grid-template-columns: 1fr; gap: 30px; }
  .footer-bottom { gap: 15px; flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .core-node::after { animation: none; }
  * { transition: none !important; }
}