:root {
  --ink: #111820;
  --ink-soft: #1a2530;
  --paper: #f4f1e9;
  --paper-deep: #e8e3d8;
  --orange: #f3a21a;
  --orange-light: #ffc95c;
  --line: rgba(17, 24, 32, .16);
  --muted: #66717a;
  --white: #fffdf7;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  line-height: 1.5;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

.site-header {
  position: fixed;
  z-index: 20;
  top: 0;
  left: 0;
  right: 0;
  height: 82px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 5vw;
  color: var(--white);
  background: rgba(17, 24, 32, .90);
  border-bottom: 1px solid rgba(255, 255, 255, .12);
  backdrop-filter: blur(14px);
}
.brand { display: inline-flex; align-items: center; gap: 12px; }
.brand-mark {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  color: var(--ink);
  background: var(--orange);
  font: 900 16px/1 Arial, sans-serif;
  letter-spacing: .02em;
}
.brand strong { display: block; font-size: 17px; letter-spacing: .08em; }
.brand small { display: block; margin-top: 2px; color: #aeb6bc; font: 10px/1.2 Arial, sans-serif; letter-spacing: .14em; }
.desktop-nav { display: flex; align-items: center; gap: 30px; margin-left: auto; margin-right: 34px; color: #dbe0e1; font-size: 14px; }
.desktop-nav a { transition: color .2s ease; }
.desktop-nav a:hover, .desktop-nav a:focus-visible { color: var(--orange-light); }
.header-action {
  padding: 11px 15px;
  color: var(--ink);
  background: var(--orange);
  font-size: 13px;
  font-weight: 800;
}
.header-action span, .button span { margin-left: 10px; font-size: 17px; }

.hero { position: relative; min-height: 780px; display: flex; align-items: center; overflow: hidden; color: var(--white); background: var(--ink); }
.hero-media { position: absolute; inset: 0; background: url("assets/photos/01.jpg") center 36% / cover no-repeat; transform: scale(1.02); }
.hero-overlay { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(17,24,32,.95) 0%, rgba(17,24,32,.78) 42%, rgba(17,24,32,.28) 100%), linear-gradient(0deg, rgba(17,24,32,.72), transparent 58%); }
.hero-content { position: relative; z-index: 1; width: min(1180px, 90vw); margin: 96px auto 46px; }
.eyebrow { margin: 0 0 20px; color: var(--orange-light); font: 700 12px/1.2 Arial, sans-serif; letter-spacing: .2em; text-transform: uppercase; }
.eyebrow.dark { color: #a65d00; }
h1, h2, h3, p { margin-top: 0; }
h1 { max-width: 720px; margin-bottom: 24px; font-size: clamp(43px, 6vw, 78px); line-height: 1.08; letter-spacing: -.02em; }
h1 em, h2 span { color: var(--orange-light); font-style: normal; }
.hero-copy { max-width: 560px; margin-bottom: 30px; color: #d4dadd; font-size: 17px; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.button { display: inline-flex; min-height: 48px; align-items: center; justify-content: center; padding: 13px 19px; border: 1px solid transparent; font-size: 14px; font-weight: 800; cursor: pointer; transition: transform .2s ease, background .2s ease, color .2s ease; }
.button:hover, .button:focus-visible { transform: translateY(-2px); }
.button-primary { color: var(--ink); background: var(--orange); }
.button-primary:hover, .button-primary:focus-visible { background: var(--orange-light); }
.button-ghost { color: var(--white); border-color: rgba(255,255,255,.4); background: rgba(17,24,32,.2); }
.button-ghost:hover, .button-ghost:focus-visible { border-color: var(--orange-light); color: var(--orange-light); }
.hero-note { display: flex; align-items: center; gap: 9px; max-width: 560px; margin-top: 46px; color: #c5cdd0; font-size: 13px; }
.status-dot { width: 8px; height: 8px; flex: 0 0 auto; background: var(--orange); box-shadow: 0 0 0 5px rgba(243,162,26,.18); }
.hero-scroll { position: absolute; right: 5vw; bottom: 38px; z-index: 1; color: #c5cdd0; font-size: 12px; letter-spacing: .12em; }
.hero-scroll span { display: inline-block; margin-left: 10px; color: var(--orange); font-size: 20px; }

.signal-strip { display: grid; grid-template-columns: repeat(4, 1fr); border-bottom: 1px solid var(--line); background: var(--paper-deep); }
.signal-strip div { display: flex; align-items: center; gap: 14px; min-height: 88px; padding: 18px 5vw; border-right: 1px solid var(--line); }
.signal-strip div:last-child { border-right: 0; }
.signal-strip strong { color: #a65d00; font: 700 12px/1 Arial, sans-serif; letter-spacing: .08em; }
.signal-strip span { font-size: 14px; font-weight: 700; }

.section { width: min(1180px, 90vw); margin: 0 auto; padding: 116px 0; }
.section-heading { display: grid; grid-template-columns: minmax(0, 1fr) minmax(280px, .7fr); gap: 10%; align-items: end; margin-bottom: 52px; }
h2 { margin-bottom: 0; font-size: clamp(36px, 5vw, 58px); line-height: 1.08; letter-spacing: -.02em; }
.section-intro { max-width: 390px; margin-bottom: 4px; color: var(--muted); font-size: 15px; }

.service-grid { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.service-item { min-height: 260px; padding: 26px 27px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); background: rgba(255,253,247,.28); }
.service-item:hover { background: var(--white); }
.service-featured { background: var(--ink); color: var(--white); }
.service-featured:hover { background: var(--ink-soft); }
.service-number { display: block; margin-bottom: 48px; color: var(--orange); font: 700 12px/1 Arial, sans-serif; letter-spacing: .12em; }
.service-item h3 { margin-bottom: 12px; font-size: 22px; }
.service-item p { min-height: 52px; margin-bottom: 21px; color: var(--muted); font-size: 14px; }
.service-featured p { color: #c8d0d2; }
.service-tag { display: inline-block; padding: 5px 8px; color: #a65d00; border: 1px solid rgba(166,93,0,.3); font-size: 11px; font-weight: 800; }
.service-featured .service-tag { color: var(--orange-light); border-color: rgba(255,201,92,.35); }

.checklist-section { display: grid; grid-template-columns: .9fr 1.1fr; gap: 10%; align-items: center; padding-top: 90px; padding-bottom: 90px; }
.checklist-copy > p:not(.eyebrow) { max-width: 440px; margin-top: 26px; color: var(--muted); font-size: 15px; }
.text-link { display: inline-block; margin-top: 20px; padding-bottom: 6px; border-bottom: 2px solid var(--orange); font-size: 14px; font-weight: 800; }
.text-link span { margin-left: 12px; color: #a65d00; }
.checklist { border-top: 1px solid var(--line); }
.check-row { display: grid; grid-template-columns: 58px 1fr; gap: 18px; padding: 22px 0; border-bottom: 1px solid var(--line); }
.check-row > span { color: #a65d00; font: 700 12px/1 Arial, sans-serif; }
.check-row strong, .check-row small { display: block; }
.check-row strong { margin-bottom: 5px; font-size: 17px; }
.check-row small { color: var(--muted); font-size: 13px; }

.cases-section { padding-top: 104px; }
.cases-heading { margin-bottom: 36px; }
.gallery { display: grid; grid-template-columns: 1.25fr 1fr 1fr; grid-auto-rows: 235px; gap: 11px; }
.gallery figure { position: relative; overflow: hidden; margin: 0; background: #c6c0b3; }
.gallery figure::after { position: absolute; inset: auto 0 0; height: 55%; content: ""; background: linear-gradient(transparent, rgba(17,24,32,.42)); pointer-events: none; }
.gallery img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.gallery figure:hover img { transform: scale(1.05); }
.gallery-large { grid-row: span 2; }

.process-section { width: 100%; padding: 0; background: var(--ink); color: var(--white); }
.process-panel { display: grid; grid-template-columns: .85fr 1.15fr; gap: 10%; width: min(1180px, 90vw); margin: 0 auto; padding: 112px 0; }
.process-heading h2 { color: var(--white); }
.process-list { display: grid; grid-template-columns: 1fr 1fr; gap: 0 34px; margin: 0; padding: 0; list-style: none; border-top: 1px solid rgba(255,255,255,.2); }
.process-list li { display: grid; grid-template-columns: 42px 1fr; gap: 14px; padding: 24px 0; border-bottom: 1px solid rgba(255,255,255,.2); }
.process-list li > span { color: var(--orange); font: 700 12px/1 Arial, sans-serif; }
.process-list strong, .process-list small { display: block; }
.process-list strong { margin-bottom: 6px; font-size: 16px; }
.process-list small { color: #aeb6bc; font-size: 12px; }

.contact-section { display: grid; grid-template-columns: .9fr 1.1fr; gap: 12%; align-items: start; }
.contact-copy > p:not(.eyebrow) { max-width: 430px; margin-top: 25px; color: var(--muted); font-size: 15px; }
.contact-meta { display: grid; gap: 15px; margin-top: 42px; }
.contact-meta div { display: flex; justify-content: space-between; max-width: 390px; gap: 20px; padding-bottom: 12px; border-bottom: 1px solid var(--line); }
.contact-meta span { color: var(--muted); font-size: 12px; }
.contact-meta strong { font-size: 13px; text-align: right; }
.contact-meta a { color: #a65d00; text-decoration: underline; text-underline-offset: 3px; }
.inquiry-form { padding: 30px; border-top: 5px solid var(--orange); background: var(--white); box-shadow: 0 15px 45px rgba(17,24,32,.08); }
.inquiry-form label { display: block; margin-bottom: 17px; color: var(--muted); font-size: 12px; font-weight: 700; }
.inquiry-form input, .inquiry-form select, .inquiry-form textarea { width: 100%; margin-top: 7px; padding: 13px 14px; border: 1px solid var(--line); border-radius: 0; outline: 0; color: var(--ink); background: var(--paper); font: inherit; font-size: 14px; }
.inquiry-form input:focus, .inquiry-form select:focus, .inquiry-form textarea:focus { border-color: var(--orange); box-shadow: 0 0 0 3px rgba(243,162,26,.15); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.inquiry-form .button { width: 100%; border: 0; }
.form-hint { margin: 12px 0 0; color: var(--muted); font-size: 11px; }
.form-result { display: block; margin-top: 16px; white-space: pre-wrap; color: #355844; font-size: 12px; }

.site-footer { display: flex; justify-content: space-between; gap: 30px; padding: 34px 5vw; color: #c9d0d2; background: #0c1116; }
.site-footer strong { color: var(--white); font-size: 15px; }
.site-footer p { margin: 7px 0 0; color: #8e9aa2; font-size: 12px; }
.footer-right { display: flex; flex-direction: column; align-items: flex-end; gap: 6px; color: #8e9aa2; font-size: 11px; text-align: right; }

@media (max-width: 800px) {
  .site-header { height: 68px; padding: 0 5vw; }
  .brand small, .desktop-nav { display: none; }
  .brand strong { font-size: 15px; }
  .brand-mark { width: 34px; height: 34px; font-size: 14px; }
  .header-action { padding: 9px 11px; font-size: 11px; }
  .hero { min-height: 700px; }
  .hero-content { margin-top: 80px; }
  h1 { font-size: clamp(40px, 12vw, 60px); }
  .hero-copy { font-size: 15px; }
  .hero-scroll { display: none; }
  .signal-strip { grid-template-columns: repeat(2, 1fr); }
  .signal-strip div { min-height: 70px; padding: 14px 5vw; }
  .signal-strip div:nth-child(2) { border-right: 0; }
  .signal-strip div:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .section { padding: 78px 0; }
  .section-heading, .checklist-section, .contact-section, .process-panel { grid-template-columns: 1fr; gap: 36px; }
  .section-heading { margin-bottom: 34px; }
  .section-intro { max-width: 100%; }
  .service-grid { grid-template-columns: 1fr 1fr; }
  .service-item { min-height: 238px; padding: 21px 19px; }
  .service-number { margin-bottom: 32px; }
  .service-item h3 { font-size: 19px; }
  .service-item p { min-height: 72px; font-size: 13px; }
  .checklist-section { padding-top: 66px; padding-bottom: 66px; }
  .gallery { grid-template-columns: 1fr 1fr; grid-auto-rows: 180px; }
  .gallery-large { grid-row: span 2; }
  .process-panel { padding: 78px 0; }
  .process-list { grid-template-columns: 1fr; }
  .contact-meta { margin-top: 28px; }
  .site-footer { flex-direction: column; }
  .footer-right { align-items: flex-start; text-align: left; }
}

@media (max-width: 470px) {
  .header-action span { display: none; }
  .hero { min-height: 660px; }
  .hero-content { width: 90vw; }
  .hero-actions .button { flex: 1; }
  .hero-note { margin-top: 32px; font-size: 12px; }
  .service-grid { grid-template-columns: 1fr; }
  .service-item { min-height: auto; }
  .service-item p { min-height: auto; }
  .gallery { grid-template-columns: 1fr 1fr; grid-auto-rows: 135px; gap: 7px; }
  .inquiry-form { padding: 22px 18px; }
  .form-row { grid-template-columns: 1fr; gap: 0; }
}