:root {
  --navy-900: #0a1f3c;
  --navy-800: #0f2a4d;
  --navy-700: #16365f;
  --navy-600: #1e4377;
  --navy-500: #2c5788;
  --gold: #c5a572;
  --gold-dark: #a8884f;
  --ink: #0f1b2d;
  --text: #3d4d5f;
  --muted: #768392;
  --line: #e3e8ef;
  --line-soft: #eef2f7;
  --bg: #ffffff;
  --bg-soft: #f5f7fa;
  --bg-tint: #eef2f7;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.8;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  color: var(--ink);
  line-height: 1.35;
  font-weight: 600;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

.wrap { max-width: 1180px; margin: 0 auto; padding: 0 32px; }

/* ---------- top bar ---------- */
.topbar {
  background: var(--navy-900);
  color: #aebfd4;
  font-size: 13px;
}
.topbar-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 40px;
}
.topbar a { color: #aebfd4; }
.topbar a:hover { color: var(--gold); }
.topbar-left { display: flex; gap: 24px; }
.topbar-right { display: flex; gap: 22px; align-items: center; }
.topbar .gold-dot { color: var(--gold); margin-right: 6px; }

/* ---------- header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}
.brand { display: flex; align-items: center; gap: 14px; }
.brand-logo { width: 40px; height: 40px; flex: none; }
.brand-name {
  font-size: 17px; font-weight: 600; color: var(--navy-800);
  letter-spacing: 1px; white-space: nowrap;
}
.brand-mark {
  width: 46px; height: 46px;
  background: var(--navy-800);
  color: var(--gold);
  display: flex; align-items: center; justify-content: center;
  font-size: 22px; font-weight: 700;
  border: 1px solid var(--gold);
}
.brand-text { display: flex; flex-direction: column; line-height: 1.3; }
.brand-text strong { font-size: 18px; color: var(--ink); letter-spacing: 1px; }
.brand-text small { font-size: 11.5px; color: var(--muted); }
.site-nav { display: flex; align-items: center; gap: 34px; font-size: 15px; }
.site-nav a { color: var(--text); position: relative; padding: 6px 0; transition: color 0.2s; }
.site-nav a:hover { color: var(--navy-700); }
.site-nav a.active { color: var(--navy-800); font-weight: 600; }
.site-nav a.active::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0;
  height: 2px; background: var(--gold);
}
.nav-cta {
  background: var(--navy-800); color: #fff !important;
  padding: 9px 22px; border: 1px solid var(--navy-800);
}
.nav-cta:hover { background: var(--gold); border-color: var(--gold); color: var(--navy-900) !important; }
.nav-cta.active { background: var(--navy-700); }
.nav-cta.active::after { display: none; }
.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 6px; }
.nav-toggle span { width: 22px; height: 2px; background: var(--navy-800); transition: 0.2s; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 14px 32px; font-size: 15px; cursor: pointer;
  border: 1px solid transparent; border-radius: 2px;
  transition: all 0.25s ease; letter-spacing: 1px;
}
.btn-gold { background: var(--gold); color: var(--navy-900); font-weight: 600; }
.btn-gold:hover { background: var(--gold-dark); }
.btn-outline-w { border-color: rgba(255,255,255,0.5); color: #fff; }
.btn-outline-w:hover { background: #fff; color: var(--navy-800); border-color: #fff; }
.btn-outline-d { border-color: var(--navy-700); color: var(--navy-700); }
.btn-outline-d:hover { background: var(--navy-800); color: #fff; }

/* ---------- hero ---------- */
.hero {
  background: linear-gradient(135deg, var(--navy-900) 0%, var(--navy-700) 55%, var(--navy-600) 100%);
  color: #d8e2ef;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: ""; position: absolute; inset: 0;
  background:
    radial-gradient(circle at 88% 12%, rgba(197,165,114,0.18), transparent 45%),
    radial-gradient(circle at 5% 90%, rgba(197,165,114,0.08), transparent 40%);
  pointer-events: none;
}
.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 64px;
  align-items: center;
  padding: 92px 0 100px;
}
.hero-eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 13px; letter-spacing: 3px; color: var(--gold);
  text-transform: uppercase; margin-bottom: 26px;
}
.hero-eyebrow::before { content: ""; width: 32px; height: 1px; background: var(--gold); }
.hero h1 {
  color: #fff; font-size: 42px; font-weight: 600;
  letter-spacing: 2px; margin-bottom: 24px;
}
.hero h1 em { font-style: normal; color: var(--gold); }
.hero-lead {
  font-size: 16.5px; color: #b9c6db; max-width: 540px; margin-bottom: 38px; line-height: 1.9;
}
.hero-actions { display: flex; gap: 18px; flex-wrap: wrap; }
.hero-stats {
  display: grid; grid-template-columns: 1fr 1fr; gap: 1px;
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.12);
}
.hero-stat {
  background: rgba(10,31,60,0.55);
  padding: 30px 28px;
}
.hero-stat b {
  display: block; font-size: 32px; color: var(--gold); font-weight: 600;
  margin-bottom: 6px; letter-spacing: 1px;
}
.hero-stat span { font-size: 13.5px; color: #aebfd4; }

/* ---------- marquee band ---------- */
.band {
  background: var(--navy-900);
  border-top: 1px solid rgba(255,255,255,0.08);
}
.band-items {
  display: grid; grid-template-columns: repeat(4, 1fr);
  padding: 30px 0;
}
.band-items > div {
  text-align: center; border-right: 1px solid rgba(255,255,255,0.1);
}
.band-items > div:last-child { border-right: none; }
.band-items b { display: block; font-size: 13px; color: var(--gold); letter-spacing: 2px; margin-bottom: 8px; }
.band-items span { color: #8a9bb2; font-size: 13px; }

/* ---------- section ---------- */
.section { padding: 100px 0; }
.section-soft { background: var(--bg-soft); }
.section-tint { background: var(--bg-tint); }
.section-dark { background: var(--navy-900); color: #b9c6db; }
.section-dark h2, .section-dark h3, .section-dark b { color: #fff; }

.section-head { max-width: 680px; margin-bottom: 60px; }
.section-center { margin-left: auto; margin-right: auto; text-align: center; }
.kicker {
  display: inline-flex; align-items: center; gap: 12px;
  font-size: 13px; letter-spacing: 4px; color: var(--gold);
  margin-bottom: 16px; font-weight: 600;
}
.kicker::before, .kicker::after { content: ""; width: 28px; height: 1px; background: var(--gold); opacity: 0.6; }
.section-center .kicker::before, .section-center .kicker::after { display: inline-block; }
.section-head h2 { font-size: 30px; letter-spacing: 1.5px; margin-bottom: 16px; }
.section-center h2 { }
.section-head p { color: var(--muted); font-size: 15.5px; }
.section-dark .section-head p { color: #93a4ba; }

/* 副标题需单行展示时，解除 680px 限制、用满 .wrap 的 1116px。
   不加 white-space:nowrap —— 否则窄屏会横向溢出；窄于此宽度时自然折行即可。 */
.section-head.wide { max-width: none; }

/* ---------- cards ---------- */
.card {
  background: #fff; border: 1px solid var(--line);
  padding: 38px 34px; position: relative;
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}
.card::before {
  content: ""; position: absolute; top: 0; left: 0; width: 100%; height: 3px;
  background: var(--gold); transform: scaleX(0); transform-origin: left;
  transition: transform 0.3s ease;
}
.card:hover { transform: translateY(-6px); box-shadow: 0 18px 40px rgba(15,42,77,0.1); border-color: transparent; }
.card:hover::before { transform: scaleX(1); }
.card-icon {
  width: 54px; height: 54px; border: 1px solid var(--gold);
  color: var(--gold); display: flex; align-items: center; justify-content: center;
  font-size: 22px; font-weight: 600; margin-bottom: 22px;
  font-family: Georgia, serif;
}
.card h3 { font-size: 19px; margin-bottom: 14px; letter-spacing: 1px; }
.card p { font-size: 14.5px; color: var(--text); margin-bottom: 18px; }
.card ul { list-style: none; }
.card li {
  font-size: 14px; padding: 7px 0 7px 22px; position: relative; color: var(--text);
  border-top: 1px dashed var(--line-soft);
}
.card li:first-child { border-top: none; }
.card li::before {
  content: ""; position: absolute; left: 4px; top: 16px;
  width: 6px; height: 6px; background: var(--gold);
}

.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }

/* ---------- about split ---------- */
.split { display: grid; grid-template-columns: 1.4fr 1fr; gap: 64px; align-items: start; }
.split p { font-size: 15.5px; margin-bottom: 18px; color: var(--text); }
.factbox {
  background: var(--navy-900); color: #c2cee0; padding: 40px 36px;
}
.factbox dt {
  font-size: 12.5px; color: var(--gold); letter-spacing: 2px;
  margin-top: 20px; text-transform: uppercase;
}
.factbox dt:first-child { margin-top: 0; }
.factbox dd {
  font-size: 16px; color: #fff; font-weight: 500;
  padding-bottom: 16px; border-bottom: 1px solid rgba(255,255,255,0.1);
  margin-top: 6px;
}
.factbox dd:last-child { border-bottom: none; padding-bottom: 0; }
.quote {
  border-left: 3px solid var(--gold); padding: 8px 0 8px 24px;
  margin-top: 30px; font-size: 16px; color: var(--ink); font-weight: 500;
}

/* ---------- process steps ---------- */
.steps { display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; counter-reset: s; }
.steps .step {
  text-align: left; position: relative; padding: 36px 26px;
  background: #fff; border: 1px solid var(--line);
}
.step-no {
  width: 44px; height: 44px; background: var(--navy-800); color: var(--gold);
  display: flex; align-items: center; justify-content: center;
  font-size: 18px; font-weight: 600; font-family: Georgia, serif;
  margin-bottom: 20px;
}
.step h3 { font-size: 17px; margin-bottom: 8px; }
.step p { font-size: 13.5px; color: var(--muted); }
.step-time {
  display: inline-block; font-size: 12px; color: var(--gold-dark);
  background: rgba(197,165,114,0.1); padding: 3px 10px; margin-top: 12px;
}

/* vertical process */
.vsteps { list-style: none; max-width: 760px; }
.vsteps li {
  display: grid; grid-template-columns: 70px 1fr; gap: 28px;
  padding: 0 0 44px 0; position: relative;
}
.vsteps li::before {
  content: ""; position: absolute; left: 34px; top: 50px; bottom: 0;
  width: 1px; background: var(--line);
}
.vsteps li:last-child::before { display: none; }
.vsteps .step-no { position: relative; z-index: 1; }
.vsteps h3 { font-size: 19px; margin-bottom: 10px; }
.vsteps p { font-size: 15px; color: var(--text); }

/* ---------- metric / strength dark ---------- */
.feature {
  padding: 40px 0; border-bottom: 1px solid rgba(255,255,255,0.08);
}
.feature:last-child { border-bottom: none; }
.feature-grid {
  display: grid; grid-template-columns: 60px 1fr; gap: 28px; align-items: start;
}
.feature-num {
  font-family: Georgia, serif; font-size: 34px; color: var(--gold);
  line-height: 1; padding-top: 4px;
}
.feature h3 { font-size: 20px; margin-bottom: 12px; }
.feature p { color: #93a4ba; font-size: 14.5px; }

/* ---------- timeline ---------- */
.timeline { list-style: none; max-width: 760px; }
.timeline li {
  display: grid; grid-template-columns: 90px 1fr; gap: 28px;
  padding: 0 0 32px 28px; border-left: 1px solid var(--line);
  position: relative;
}
.timeline li::before {
  content: ""; position: absolute; left: -6px; top: 6px;
  width: 11px; height: 11px; background: var(--gold);
  border: 2px solid #fff; box-shadow: 0 0 0 1px var(--gold);
}
.timeline li:last-child { border-left-color: transparent; }
.timeline b { color: var(--navy-700); font-size: 18px; font-family: Georgia, serif; }
.timeline p { color: var(--text); font-size: 14.5px; margin-top: 4px; }

/* ---------- faq ---------- */
.faq { max-width: 760px; }
.faq details {
  background: #fff; border: 1px solid var(--line);
  padding: 22px 28px; margin-bottom: 14px;
}
.faq summary {
  font-weight: 600; font-size: 16px; cursor: pointer; list-style: none;
  color: var(--ink); position: relative; padding-right: 30px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+"; position: absolute; right: 0; top: -2px;
  color: var(--gold); font-size: 22px;
}
.faq details[open] summary::after { content: "−"; }
.faq p { margin-top: 14px; color: var(--text); font-size: 14.5px; }

/* ---------- contact ---------- */
.contact-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 60px; align-items: start; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.field { display: flex; flex-direction: column; gap: 8px; margin-bottom: 18px; }
.field label { font-size: 13.5px; color: var(--muted); font-weight: 500; letter-spacing: 1px; }
.field input, .field textarea {
  font: inherit; font-weight: 400; padding: 13px 16px;
  border: 1px solid var(--line); background: var(--bg-soft);
  transition: border-color 0.2s, background 0.2s;
}
.field input:focus, .field textarea:focus {
  outline: none; border-color: var(--gold); background: #fff;
}
.form-tip { font-size: 14px; color: var(--gold-dark); min-height: 20px; margin-top: 6px; }
.contact-card {
  background: var(--navy-900); color: #c2cee0; padding: 44px 38px;
}
.contact-card h3 { color: #fff; font-size: 19px; margin-bottom: 26px; padding-bottom: 18px; border-bottom: 1px solid rgba(255,255,255,0.12); }
.contact-card p { font-size: 14.5px; margin-bottom: 22px; }
.contact-card .lbl { display: block; color: var(--gold); font-size: 12px; letter-spacing: 2px; margin-bottom: 6px; text-transform: uppercase; }
.contact-card .val { color: #fff; font-size: 16px; }

/* ---------- page hero (inner) ---------- */
.page-hero {
  background: linear-gradient(135deg, var(--navy-900), var(--navy-700));
  color: #d8e2ef; padding: 58px 0 54px; position: relative; overflow: hidden;
}
.page-hero::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(circle at 90% 10%, rgba(197,165,114,0.16), transparent 45%);
}
.page-hero .wrap { position: relative; }
.crumbs { font-size: 13px; color: #8a9bb2; margin-bottom: 20px; }
.crumbs a { color: #8a9bb2; }
.crumbs a:hover { color: var(--gold); }
.crumbs span { margin: 0 8px; color: #44576f; }
.page-hero h1 { color: #fff; font-size: 34px; letter-spacing: 2px; margin-bottom: 16px; }
.page-hero p { color: #b9c6db; font-size: 16px; max-width: 620px; }

/* ---------- cta ---------- */
.cta {
  background: var(--navy-900);
  background-image: linear-gradient(135deg, var(--navy-800), var(--navy-600));
  text-align: center;
}
.cta .wrap { padding: 80px 32px; }
.cta h2 { color: #fff; font-size: 28px; letter-spacing: 2px; margin-bottom: 14px; }
.cta p { color: #b9c6db; margin-bottom: 32px; }

/* ---------- footer ---------- */
.site-footer { background: #07172b; color: #8a9bb2; padding: 56px 0 0; }
.footer-grid {
  display: grid; grid-template-columns: 1.4fr 1fr; gap: 40px;
  padding-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-brand { color: #fff; font-size: 17px; font-weight: 600; margin-bottom: 6px; letter-spacing: 1px; }
.footer-slogan { font-size: 13.5px; color: var(--gold); }
.footer-desc { font-size: 13.5px; margin-top: 14px; max-width: 420px; line-height: 1.9; }
.footer-nav { display: flex; gap: 28px; justify-content: flex-end; flex-wrap: wrap; font-size: 14px; }
.footer-nav a:hover { color: var(--gold); }
.footer-legal {
  padding: 22px 0; display: flex; justify-content: space-between;
  gap: 16px; flex-wrap: wrap; font-size: 12.5px; color: #5a6c83;
}
.footer-legal a { color: inherit; text-decoration: none; }
.footer-legal a:hover { text-decoration: underline; }

/* ---------- reveal ---------- */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.visible { opacity: 1; transform: none; }

/* ---------- responsive ---------- */
@media (max-width: 980px) {
  .hero-inner, .split, .contact-grid, .footer-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 32px; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr 1fr; }
  .steps { grid-template-columns: 1fr 1fr; }
  .footer-nav { justify-content: flex-start; }
  .brand-name { font-size: 14px; letter-spacing: 0; }
  .site-nav { gap: 22px; font-size: 14px; }
}
@media (max-width: 640px) {
  .topbar-left .tb-hide { display: none; }
  .site-nav {
    position: fixed; inset: 76px 0 auto 0; background: #fff;
    flex-direction: column; align-items: flex-start; padding: 24px 32px;
    gap: 22px; border-bottom: 1px solid var(--line);
    transform: translateY(-130%); transition: transform 0.28s ease;
    box-shadow: 0 20px 40px rgba(15,42,77,0.12);
  }
  .site-nav.open { transform: none; }
  .nav-toggle { display: flex; }
  .nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-toggle.open span:nth-child(2) { opacity: 0; }
  .nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  .grid-2, .grid-3, .grid-4, .steps, .form-row, .band-items, .hero-stats { grid-template-columns: 1fr; }
  .hero { padding: 0; }
  .hero-inner { padding: 60px 0 70px; }
  .page-hero h1, .hero h1 { font-size: 26px; }
  .section { padding: 64px 0; }
  .band-items > div { border-right: none; border-bottom: 1px solid rgba(255,255,255,0.1); padding-bottom: 16px; }
  .footer-nav { gap: 18px; }
}

.hero-photo {
  position: absolute; inset: 0;
  pointer-events: none;
  opacity: .3;
  -webkit-mask-image: linear-gradient(to right, transparent 25%, #000 70%);
  mask-image: linear-gradient(to right, transparent 25%, #000 70%);
}
.hero-photo img {
  display: block;
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: center 35%;
}