:root {
    --rb-navy: #101d2c;
    --rb-navy-2: #17283a;
    --rb-ink: #1a2733;
    --rb-slate: #5f6b75;
    --rb-gold: #c89a6b;
    --rb-gold-light: #e3c39f;
    --rb-ivory: #f5f1eb;
    --rb-white: #ffffff;
    --rb-line: rgba(16, 29, 44, .14);
}

.rb-home,
.rb-home * { box-sizing: border-box; }
.rb-home { color: var(--rb-ink); background: var(--rb-white); font-family: "Helvetica Neue", Arial, sans-serif; }
.rb-shell { width: min(1180px, calc(100% - 48px)); margin: 0 auto; }
.rb-section { padding: 110px 0; }
.rb-kicker,
.rb-eyebrow { margin: 0 0 20px; color: var(--rb-gold); font-size: 12px; font-weight: 700; letter-spacing: .24em; }
.rb-title { margin: 0; color: var(--rb-navy); font-family: Georgia, "Times New Roman", serif; font-size: clamp(38px, 4vw, 64px); font-weight: 600; line-height: 1.06; letter-spacing: -.025em; }

.rb-hero { position: relative; overflow: hidden; background: var(--rb-navy); }
.rb-hero-swiper,
.rb-hero-slide { height: min(760px, calc(100vh - 106px)); min-height: 620px; }
.rb-hero-slide { position: relative; display: flex; align-items: center; background-position: center; background-size: cover; }
.rb-hero-overlay { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(6, 14, 23, .88) 0%, rgba(6, 14, 23, .7) 38%, rgba(6, 14, 23, .18) 72%, rgba(6, 14, 23, .08) 100%); }
.rb-hero-content { position: relative; z-index: 2; color: var(--rb-white); }
.rb-hero-content h1,
.rb-hero-content h2 { max-width: 780px; margin: 0 0 28px; color: var(--rb-white); font-family: Georgia, "Times New Roman", serif; font-size: clamp(52px, 6vw, 88px); font-weight: 600; line-height: .98; letter-spacing: -.035em; }
.rb-hero-copy { max-width: 650px; margin: 0 0 38px; color: rgba(255,255,255,.86); font-size: 19px; line-height: 1.7; }
.rb-hero-actions { display: flex; align-items: center; gap: 34px; }
.rb-btn { display: inline-flex; align-items: center; justify-content: center; min-height: 58px; padding: 0 30px; border: 1px solid transparent; font-size: 14px; font-weight: 700; letter-spacing: .02em; transition: transform .25s ease, background .25s ease, color .25s ease; }
.rb-btn:hover { transform: translateY(-2px); }
.rb-btn-gold { color: #24170e; background: var(--rb-gold-light); }
.rb-btn-gold:hover { color: var(--rb-white); background: var(--rb-gold); }
.rb-text-link { padding: 12px 0; color: var(--rb-white); border-bottom: 1px solid rgba(255,255,255,.5); font-size: 14px; font-weight: 600; }
.rb-text-link span,
.rb-inline-link span { display: inline-block; margin-left: 9px; transition: transform .25s ease; }
.rb-text-link:hover span,
.rb-inline-link:hover span { transform: translateX(5px); }
.rb-hero-pagination { bottom: 30px !important; }
.rb-hero-pagination .swiper-pagination-bullet { width: 30px; height: 3px; margin: 0 5px !important; border-radius: 0; background: rgba(255,255,255,.55); opacity: 1; }
.rb-hero-pagination .swiper-pagination-bullet-active { background: var(--rb-gold-light); }
.rb-hero-prev,
.rb-hero-next { display: none !important; }

.rb-intro { background: var(--rb-ivory); }
.rb-intro-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 100px; align-items: end; }
.rb-intro-copy { padding-bottom: 5px; }
.rb-intro-copy p { margin: 0 0 28px; color: var(--rb-slate); font-size: 18px; line-height: 1.85; }
.rb-inline-link { display: inline-block; color: var(--rb-navy); border-bottom: 1px solid var(--rb-gold); font-size: 14px; font-weight: 700; }

.rb-cases { background: var(--rb-white); }
.rb-section-head { display: grid; grid-template-columns: 1.2fr .8fr; gap: 90px; align-items: end; margin-bottom: 55px; }
.rb-section-head > p { margin: 0 0 5px; color: var(--rb-slate); font-size: 17px; line-height: 1.8; }
.rb-case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.rb-case-card { position: relative; min-height: 420px; padding: 36px; display: flex; flex-direction: column; justify-content: space-between; overflow: hidden; }
.rb-case-card::after { content: ""; position: absolute; right: -80px; bottom: -80px; width: 210px; height: 210px; border: 1px solid currentColor; border-radius: 50%; opacity: .12; }
.rb-case-card-dark { color: var(--rb-white); background: var(--rb-navy); }
.rb-case-card-warm { color: var(--rb-navy); background: #d8b58f; }
.rb-case-card-light { color: var(--rb-navy); background: #e9edf0; }
.rb-card-index { position: relative; z-index: 1; font-family: Georgia, serif; font-size: 58px; opacity: .28; }
.rb-card-tag { margin: 0 0 15px; font-size: 11px; font-weight: 700; letter-spacing: .18em; opacity: .72; }
.rb-case-card h3 { position: relative; z-index: 1; margin: 0 0 16px; font-family: Georgia, serif; font-size: 30px; line-height: 1.17; }
.rb-case-card p:last-child { position: relative; z-index: 1; margin: 0; font-size: 15px; line-height: 1.75; opacity: .78; }

.rb-services { color: var(--rb-white); background: var(--rb-navy); }
.rb-section-head-light .rb-title { color: var(--rb-white); }
.rb-section-head-light > p { color: rgba(255,255,255,.65); }
.rb-service-grid { display: grid; grid-template-columns: repeat(6, 1fr); border-top: 1px solid rgba(255,255,255,.15); border-left: 1px solid rgba(255,255,255,.15); }
.rb-service-card { position: relative; min-height: 300px; padding: 30px; color: var(--rb-white); border-right: 1px solid rgba(255,255,255,.15); border-bottom: 1px solid rgba(255,255,255,.15); }
.rb-service-card:nth-child(-n+3) { grid-column: span 2; }
.rb-service-card:nth-child(n+4) { grid-column: span 3; }
.rb-service-no { color: var(--rb-gold-light); font-size: 11px; font-weight: 700; letter-spacing: .2em; }
.rb-service-card h3 { margin: 58px 0 18px; color: inherit; font-family: Georgia, serif; font-size: 28px; line-height: 1.15; }
.rb-service-card p { max-width: 340px; margin: 0; color: inherit; font-size: 14px; line-height: 1.75; opacity: .65; }
.rb-service-arrow { position: absolute; right: 28px; top: 27px; font-size: 24px; }

.rb-question { padding: 95px 0; color: var(--rb-white); background: #263a4d; }
.rb-question-inner { display: grid; grid-template-columns: 1fr auto; gap: 80px; align-items: center; }
.rb-question h2 { margin: 0 0 17px; color: var(--rb-white); font-family: Georgia, serif; font-size: clamp(38px, 4vw, 58px); line-height: 1.05; }
.rb-question p:not(.rb-kicker) { max-width: 760px; margin: 0; color: rgba(255,255,255,.7); font-size: 17px; line-height: 1.75; }

/* Add the Hong Kong office to the existing footer contact block. */
#gwogojzzbo .ftcon::after { display: block; max-width: 360px; margin-top: 18px; color: rgba(255,255,255,.72); font-size: 14px; line-height: 1.75; white-space: pre-line; content: "Hong Kong Branch: Ruibo (Hong Kong) Business Group\A Address: Room 1005, 10/F, Ho King Commercial Centre, 2–16 Fa Yuen Street, Mong Kok, Kowloon, Hong Kong"; }

@media (max-width: 1100px) {
    .rb-hero-prev,
    .rb-hero-next { display: none; }
    .rb-intro-grid,
    .rb-section-head { gap: 50px; }
}

@media (max-width: 860px) {
    .rb-shell { width: min(100% - 34px, 680px); }
    .rb-section { padding: 76px 0; }
    .rb-hero-swiper,
    .rb-hero-slide { height: 680px; min-height: 0; }
    .rb-hero-slide { background-position: 62% center; }
    .rb-hero-overlay { background: linear-gradient(90deg, rgba(6,14,23,.88), rgba(6,14,23,.55)); }
    .rb-hero-content { padding-top: 20px; }
    .rb-hero-content h1,
    .rb-hero-content h2 { font-size: clamp(43px, 11vw, 66px); }
    .rb-hero-copy { max-width: 540px; font-size: 17px; }
    .rb-intro-grid,
    .rb-section-head,
    .rb-question-inner { grid-template-columns: 1fr; gap: 34px; }
    .rb-case-grid { grid-template-columns: 1fr; }
    .rb-case-card { min-height: 340px; }
    .rb-service-grid { grid-template-columns: 1fr; }
    .rb-service-card:nth-child(n) { grid-column: auto; min-height: 260px; }
    .rb-question-inner .rb-btn { justify-self: start; }
}

@media (max-width: 560px) {
    .rb-shell { width: calc(100% - 28px); }
    .rb-hero-swiper,
    .rb-hero-slide { height: 650px; }
    .rb-hero-slide { background-position: 68% center; }
    .rb-hero-actions { align-items: flex-start; flex-direction: column; gap: 15px; }
    .rb-btn { width: 100%; }
    .rb-title { font-size: 39px; }
    .rb-case-card { padding: 28px; }
    .rb-question { padding: 72px 0; }
}