:root {
  --ink: #16302B;
  --ink2: #0E2420;
  --gold: #C09A5B;
  --paper: #FBFAF7;
  --paper2: #F3F0EA;
  --text: #2C2C2A;
  --muted: #6B6B66;
  --line: #E3DED4;
  --maxw: 1180px;
}

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

html { scroll-behavior: smooth; }

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

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* ---------- 顶部导航 ---------- */
.top {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  background: rgba(22, 48, 43, 0.94);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.top .wrap { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.brand { color: #fff; display: flex; flex-direction: column; line-height: 1.25; }
.brand b { font-size: 17px; font-weight: 500; letter-spacing: 1px; }
.brand span { font-size: 10px; color: rgba(255,255,255,0.55); letter-spacing: 1.4px; }

.nav { display: flex; align-items: center; gap: 30px; }
.nav a {
  color: rgba(255,255,255,0.78); font-size: 14px;
  padding: 6px 0; border-bottom: 2px solid transparent; transition: .2s;
}
.nav a:hover, .nav a.on { color: #fff; border-bottom-color: var(--gold); }
.langbtn {
  border: 1px solid rgba(255,255,255,0.3); background: none; color: #fff;
  font-size: 12px; padding: 5px 12px; border-radius: 20px; cursor: pointer;
  font-family: inherit; transition: .2s;
}
.langbtn:hover { border-color: var(--gold); color: var(--gold); }

.burger { display: none; background: none; border: 0; cursor: pointer; padding: 8px; }
.burger i { display: block; width: 22px; height: 2px; background: #fff; margin: 4px 0; }

/* ---------- Hero ---------- */
.hero {
  position: relative; min-height: 560px; display: flex; align-items: center;
  background: var(--ink2);
  margin-top: 68px; overflow: hidden;
}
.hero::after {
  content: ""; position: absolute; right: -60px; top: 0; bottom: 0; width: 46%;
  background: linear-gradient(90deg, var(--ink2) 0%, rgba(14,36,32,0.55) 40%, rgba(14,36,32,0.3) 100%),
              url("images/g02.jpg") center/cover no-repeat;
  opacity: .55;
}
.hero .wrap { position: relative; z-index: 2; padding-top: 70px; padding-bottom: 70px; width: 100%; }
.hero-inner { display: flex; align-items: center; gap: 48px; }
.hero-txt { flex: 1; max-width: 640px; }
.hero-pic { flex: 0 0 300px; position: relative; z-index: 3; }
.hero-pic img { border-radius: 4px; box-shadow: 0 18px 48px rgba(0,0,0,0.45); width: 100%; }
.hero.sub::after { width: 100%; opacity: .22; }
.hero h1 { color: #fff; font-size: 40px; font-weight: 500; line-height: 1.4; letter-spacing: 1px; }
.hero .en { color: var(--gold); font-size: 13px; letter-spacing: 2.5px; margin-top: 10px; }
.hero p.lead { color: rgba(255,255,255,0.82); margin-top: 22px; max-width: 620px; font-size: 15px; }
.hero .btns { margin-top: 32px; display: flex; gap: 14px; flex-wrap: wrap; }
.btn {
  display: inline-block; padding: 12px 30px; border-radius: 3px; font-size: 14px; transition: .2s;
}
.btn-gold { background: var(--gold); color: #fff; }
.btn-gold:hover { background: #b08b4c; }
.btn-line { border: 1px solid rgba(255,255,255,0.45); color: #fff; }
.btn-line:hover { border-color: var(--gold); color: var(--gold); }

/* ---------- 数据条 ---------- */
.facts { background: var(--paper2); border-bottom: 1px solid var(--line); }
.facts .wrap { display: grid; grid-template-columns: repeat(4, 1fr); }
.fact { padding: 34px 16px; text-align: center; border-right: 1px solid var(--line); }
.fact:last-child { border-right: 0; }
.fact b { display: block; font-size: 30px; color: var(--ink); font-weight: 500; line-height: 1.2; }
.fact b i { font-style: normal; font-size: 15px; color: var(--muted); margin-left: 2px; }
.fact span { font-size: 13px; color: var(--muted); }

/* ---------- 通用区块 ---------- */
section { padding: 76px 0; }
.sec-head { text-align: center; margin-bottom: 48px; }
.sec-head h2 { font-size: 27px; font-weight: 500; color: var(--ink); letter-spacing: 1px; }
.sec-head .en { font-size: 12px; color: var(--gold); letter-spacing: 2.5px; margin-top: 8px; }
.sec-head .bar { width: 44px; height: 2px; background: var(--gold); margin: 16px auto 0; }

.two { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.two img { border-radius: 4px; }
.prose p { color: #4a4a46; margin-bottom: 16px; text-align: justify; }
.prose p:last-child { margin-bottom: 0; }

/* ---------- 产品网格 ---------- */
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.card { background: #fff; border: 1px solid var(--line); overflow: hidden; transition: .25s; }
.card:hover { box-shadow: 0 8px 24px rgba(22,48,43,0.12); transform: translateY(-3px); }
.card .pic { height: 300px; overflow: hidden; background: var(--paper2); }
.card .pic img { width: 100%; height: 100%; object-fit: cover; transition: .4s; }
.card:hover .pic img { transform: scale(1.05); }
.card .cap { padding: 14px 16px; border-top: 1px solid var(--line); }
.card .cap b { font-size: 14px; font-weight: 500; color: var(--ink); }
.card .cap span { display: block; font-size: 12px; color: var(--muted); margin-top: 2px; }

/* ---------- 能力 / 优势 ---------- */
.caps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.cap { background: #fff; border: 1px solid var(--line); padding: 30px 26px; }
.cap .no { font-size: 12px; color: var(--gold); letter-spacing: 2px; }
.cap h3 { font-size: 17px; font-weight: 500; color: var(--ink); margin: 10px 0 12px; }
.cap p { font-size: 14px; color: var(--muted); line-height: 1.85; }

/* ---------- 流程 ---------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; margin-top: 8px; }
.step { text-align: center; padding: 20px 14px; position: relative; }
.step .dot {
  width: 54px; height: 54px; border-radius: 50%; background: var(--ink); color: #fff;
  display: flex; align-items: center; justify-content: center; margin: 0 auto 14px;
  font-size: 16px; font-weight: 500;
}
.step h4 { font-size: 15px; font-weight: 500; color: var(--ink); }
.step p { font-size: 13px; color: var(--muted); margin-top: 6px; }

/* ---------- CTA ---------- */
.cta { background: var(--ink); color: #fff; text-align: center; padding: 66px 0; }
.cta h2 { font-size: 26px; font-weight: 500; }
.cta p { color: rgba(255,255,255,0.7); margin-top: 12px; font-size: 14px; }
.cta .btn-gold { margin-top: 26px; }

/* ---------- 联系信息 ---------- */
.contact-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.cbox { border: 1px solid var(--line); background: #fff; padding: 28px 24px; }
.cbox .k { font-size: 12px; color: var(--gold); letter-spacing: 1.5px; }
.cbox .v { font-size: 16px; color: var(--ink); margin-top: 8px; font-weight: 500; }
.cbox .s { font-size: 13px; color: var(--muted); margin-top: 6px; }

/* ---------- 页脚 ---------- */
footer { background: var(--ink2); color: rgba(255,255,255,0.6); padding: 44px 0 28px; }
footer .wrap { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 20px; }
footer .fl b { color: #fff; font-size: 15px; font-weight: 500; }
footer .fl p { font-size: 13px; margin-top: 8px; }
footer .fr { font-size: 13px; text-align: right; }
footer .copy { border-top: 1px solid rgba(255,255,255,0.1); margin-top: 28px; padding-top: 18px; font-size: 12px; text-align: center; }

/* ---------- 手机端 ---------- */
@media (max-width: 900px) {
  .hero-pic { display: none; }
  .hero-inner { gap: 0; }
  .hero::after { width: 100%; opacity: .28; }
  .grid, .caps, .contact-grid { grid-template-columns: repeat(2, 1fr); }
  .two { grid-template-columns: 1fr; gap: 32px; }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .facts .wrap { grid-template-columns: repeat(2, 1fr); }
  .fact:nth-child(2) { border-right: 0; }
  .hero h1 { font-size: 28px; }
  .hero { min-height: 440px; }
}

@media (max-width: 640px) {
  .nav { display: none; position: absolute; top: 68px; left: 0; right: 0;
         background: var(--ink); flex-direction: column; align-items: stretch;
         padding: 10px 24px 20px; gap: 0; }
  .nav.show { display: flex; }
  .nav a { padding: 13px 0; border-bottom: 1px solid rgba(255,255,255,0.08); border-bottom-width: 1px; }
  .nav .langbtn { margin-top: 14px; align-self: flex-start; }
  .burger { display: block; }
  .grid, .caps, .contact-grid, .steps { grid-template-columns: 1fr; }
  section { padding: 52px 0; }
  .sec-head h2 { font-size: 22px; }
  footer .fr { text-align: left; }
  .card .pic { height: 260px; }
}