:root {
  /* 海中金配色：水生金，金得水养 */
  --navy: #061220;
  --navy-2: #0a1e38;
  --navy-3: #123055;
  --gold: #c9a84c;
  --gold-2: #e4cc7a;
  --gold-soft: #f3ead4;
  --silver: #c5ced8;
  --ink: #0f1c2e;
  --muted: #5a6b7d;
  --line: #e4eaf0;
  --paper: #f7f5f0;
  --white: #ffffff;
  --shadow: 0 16px 48px rgba(6, 18, 32, 0.10);
  --shadow-sm: 0 6px 20px rgba(6, 18, 32, 0.06);
  --radius: 16px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "Noto Sans SC", "Inter", system-ui, -apple-system, sans-serif;
  color: var(--ink);
  background: var(--white);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font-family: inherit; }

.wrap { width: min(1160px, calc(100% - 32px)); margin: 0 auto; }

/* Header */
.header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(6, 18, 32, 0.94);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(201, 168, 76, 0.16);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 72px; gap: 16px;
}
.brand { display: flex; align-items: center; gap: 12px; color: #fff; min-width: 0; }
.logo-mark {
  width: 40px; height: 40px; border-radius: 10px; flex-shrink: 0;
  background: linear-gradient(145deg, var(--gold-2), var(--gold) 60%, #9a7a2c);
  display: grid; place-items: center;
  font-weight: 800; color: var(--navy); letter-spacing: -0.04em; font-size: 15px;
}
.brand-name { font-weight: 700; font-size: 15px; line-height: 1.2; white-space: nowrap; }
.brand-name small { display: block; font-weight: 500; opacity: 0.65; font-size: 10px; letter-spacing: 0.12em; text-transform: uppercase; }
.nav { display: flex; align-items: center; gap: 26px; color: rgba(255,255,255,.85); font-size: 14px; font-weight: 500; }
.nav a { position: relative; }
.nav a:hover { color: var(--gold-2); }
.header-actions { display: flex; align-items: center; gap: 10px; }
.lang {
  display: flex; background: rgba(255,255,255,.07); border-radius: 999px; padding: 3px;
}
.lang button {
  border: 0; background: transparent; color: #c5d0dc; padding: 7px 11px;
  border-radius: 999px; cursor: pointer; font-size: 12px; font-weight: 600;
  transition: .15s;
}
.lang button.active { background: var(--gold); color: var(--navy); }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  border: 0; cursor: pointer; border-radius: 999px;
  padding: 13px 22px; font-weight: 700; font-size: 14px;
  transition: .18s transform, .18s background, .18s box-shadow;
}
.btn:hover { transform: translateY(-1px); }
.btn-gold { background: var(--gold); color: var(--navy); }
.btn-gold:hover { background: var(--gold-2); box-shadow: 0 8px 24px rgba(201, 168, 76, 0.28); }
.btn-outline {
  background: transparent; color: #fff;
  border: 1px solid rgba(255,255,255,.32);
}
.btn-outline:hover { border-color: var(--gold-2); color: var(--gold-2); }
.btn-navy { background: var(--navy); color: #fff; }
.btn-navy:hover { background: var(--navy-2); }
.btn-wide { width: 100%; }

/* Hero — 马士基式大画面 + 清晰信息 */
.hero {
  position: relative; min-height: 88vh;
  background:
    linear-gradient(180deg, rgba(6,18,32,.48), rgba(6,18,32,.78)),
    url("../images/ops-6.jpg") center/cover no-repeat;
  color: #fff; display: grid; align-items: end;
}
.hero-inner { padding: 120px 0 64px; }
.kicker {
  display: inline-flex; align-items: center; gap: 8px;
  letter-spacing: .2em; text-transform: uppercase;
  font-size: 11px; font-weight: 700; color: var(--gold-2); margin-bottom: 16px;
}
.hero h1 {
  font-size: clamp(34px, 5.6vw, 62px); line-height: 1.06;
  font-weight: 800; max-width: 15ch; margin-bottom: 18px; letter-spacing: -0.02em;
}
.hero p.lead { max-width: 560px; font-size: 17px; color: #d4dde8; margin-bottom: 28px; line-height: 1.6; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 40px; }
.stats {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px;
  background: rgba(6,18,32,.5); border: 1px solid rgba(255,255,255,.1);
  border-radius: 14px; padding: 16px 18px; backdrop-filter: blur(8px);
}
.stat b { display: block; font-size: 20px; color: var(--gold-2); font-weight: 700; }
.stat span { font-size: 12px; color: #b8c6d4; }

/* Sections */
section { padding: 80px 0; scroll-margin-top: 72px; }
.section-head { max-width: 640px; margin-bottom: 36px; }
.section-head h2 { font-size: clamp(26px, 3.6vw, 38px); line-height: 1.18; margin: 6px 0 12px; letter-spacing: -0.02em; }
.section-head p { color: var(--muted); font-size: 16px; }
.eyebrow { color: var(--gold); font-weight: 700; font-size: 12px; letter-spacing: .14em; text-transform: uppercase; }

.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.grid-2 { display: grid; grid-template-columns: 1.05fr .95fr; gap: 32px; align-items: center; }
.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 24px; box-shadow: var(--shadow-sm);
  transition: .2s box-shadow, .2s transform;
}
.card:hover { box-shadow: var(--shadow); }
.card h3 { font-size: 19px; margin: 8px 0 8px; font-weight: 700; }
.card p { color: var(--muted); font-size: 14.5px; line-height: 1.65; }

.services { background: var(--paper); }
.service-card { overflow: hidden; padding: 0; }
.service-card img { height: 200px; width: 100%; object-fit: cover; }
.service-card .body { padding: 22px 22px 24px; }
.tag {
  display: inline-block; background: var(--gold-soft); color: #7a5e1a;
  font-size: 11px; font-weight: 700; padding: 4px 10px; border-radius: 999px; letter-spacing: .04em;
}

/* Network */
.network { background: var(--navy); color: #fff; }
.network .section-head p { color: #a8b8c8; }
.hubs { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.hub {
  background: rgba(255,255,255,.04); border: 1px solid rgba(255,255,255,.08);
  border-radius: 14px; padding: 22px 20px;
}
.hub strong { display: block; font-size: 17px; margin-bottom: 4px; font-weight: 700; }
.hub span { color: var(--gold-2); font-size: 12px; font-weight: 600; letter-spacing: .04em; }
.hub p { color: #b0c0d0; font-size: 13.5px; margin-top: 8px; line-height: 1.55; }

/* Gallery */
.gallery { background: var(--white); }
.shots { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.shot {
  position: relative; overflow: hidden; border-radius: 14px;
  aspect-ratio: 4 / 3; background: var(--navy);
  box-shadow: var(--shadow-sm);
}
.shot img {
  width: 100%; height: 100%; object-fit: cover; display: block;
  transition: transform .5s ease;
}
.shot:hover img { transform: scale(1.04); }
.shot.wide { grid-column: span 2; }
.shot figcaption {
  position: absolute; left: 0; right: 0; bottom: 0;
  padding: 20px 16px 14px; color: #fff; font-size: 13.5px; font-weight: 600;
  background: linear-gradient(180deg, rgba(6,18,32,0), rgba(6,18,32,.78));
}

/* Process */
.steps { display: grid; grid-template-columns: repeat(6, 1fr); gap: 12px; }
.step {
  border: 1px solid var(--line); border-radius: 14px; padding: 20px 16px;
  background: #fff; min-height: 160px;
}
.step .num { color: var(--gold); font-weight: 800; font-size: 20px; letter-spacing: -0.02em; }
.step h4 { margin: 8px 0 6px; font-size: 15px; font-weight: 700; }
.step p { font-size: 13px; color: var(--muted); line-height: 1.5; }

/* Quote */
.quote {
  background:
    linear-gradient(180deg, rgba(6,18,32,.84), rgba(6,18,32,.92)),
    url("../images/ops-5.jpg") center/cover no-repeat;
  color: #fff;
}
.quote-box {
  background: rgba(255,255,255,.97); color: var(--ink);
  border-radius: 20px; padding: 28px; box-shadow: var(--shadow);
}
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.form-grid .full { grid-column: 1 / -1; }
label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 6px; }
input, select, textarea {
  width: 100%; border: 1px solid #d8e0e8; border-radius: 10px;
  padding: 12px 14px; font-size: 14px; background: #fff;
  transition: .15s border;
}
input:focus, select:focus, textarea:focus {
  outline: none; border-color: var(--gold); box-shadow: 0 0 0 3px rgba(201,168,76,.15);
}
textarea { min-height: 100px; resize: vertical; }
.form-note { font-size: 12.5px; color: var(--muted); margin-top: 10px; }
.success {
  display: none; background: #eef8f1; color: #146c39; padding: 12px 14px;
  border-radius: 10px; margin-bottom: 14px; font-weight: 600; font-size: 14px;
}
.wa-link { color: #146c39; text-decoration: underline; font-weight: 700; }

/* FAQ */
.faq-item { border-bottom: 1px solid var(--line); padding: 18px 0; }
.faq-item button {
  width: 100%; background: none; border: 0; text-align: left;
  font-size: 16.5px; font-weight: 700; cursor: pointer;
  display: flex; justify-content: space-between; align-items: center; gap: 12px;
}
.faq-item .ans { display: none; color: var(--muted); padding-top: 10px; font-size: 14.5px; line-height: 1.65; }
.faq-item.open .ans { display: block; }

/* Footer */
footer { background: #050e18; color: #b8c4d0; padding: 48px 0 28px; }
.foot-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 28px; margin-bottom: 28px; }
footer h4 { color: #fff; margin-bottom: 12px; font-size: 15px; font-weight: 700; }
footer p, footer a { font-size: 13.5px; line-height: 1.7; }
footer a:hover { color: var(--gold-2); }
.copy { border-top: 1px solid rgba(255,255,255,.08); padding-top: 16px; font-size: 12.5px; }

.float-wa {
  position: fixed; right: 16px; bottom: 16px; z-index: 60;
  background: #25d366; color: #fff; border-radius: 999px;
  padding: 13px 18px; font-weight: 700; font-size: 14px;
  box-shadow: 0 10px 28px rgba(37,211,102,.35);
}

.menu-btn {
  display: none; background: transparent; border: 1px solid rgba(255,255,255,.25);
  color: #fff; border-radius: 10px; font-size: 18px; line-height: 1;
  padding: 9px 12px; cursor: pointer;
}

/* ===== Mobile ===== */
@media (max-width: 960px) {
  .nav {
    display: none; position: absolute; top: 72px; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: rgba(6, 18, 32, 0.98); padding: 6px 20px 18px;
    border-bottom: 1px solid rgba(201, 168, 76, 0.16);
  }
  .nav.open { display: flex; }
  .nav a { padding: 14px 4px; border-bottom: 1px solid rgba(255,255,255,.07); font-size: 15px; }
  .nav a:last-child { border-bottom: 0; }
  .menu-btn { display: inline-flex; }
  .header-inner { height: 64px; }
  .hero { min-height: auto; }
  .hero-inner { padding: 100px 0 40px; }
  .hero h1 { max-width: none; }
  .stats, .grid-3, .hubs, .form-grid, .foot-grid, .grid-2, .shots {
    grid-template-columns: 1fr;
  }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .shot.wide { grid-column: span 1; }
  section { padding: 56px 0; }
  .quote-box { padding: 22px; }
  .float-wa { right: 12px; bottom: 12px; padding: 12px 16px; }
}

@media (min-width: 641px) and (max-width: 960px) {
  .stats { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .hubs { grid-template-columns: repeat(2, 1fr); }
  .shots { grid-template-columns: repeat(2, 1fr); }
  .foot-grid { grid-template-columns: repeat(2, 1fr); }
  .shot.wide { grid-column: span 2; }
}

@media (max-width: 640px) {
  .steps { grid-template-columns: 1fr; }
  .hero h1 { font-size: 32px; }
  .hero p.lead { font-size: 15.5px; }
  .stat b { font-size: 17px; }
  .btn { padding: 12px 18px; }
  .lang button { padding: 6px 9px; font-size: 11px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .btn, .card, .shot img { transition: none; }
  .btn:hover { transform: none; }
}