/* ============================================================
   福瑞芝达 FRI — 企业官网 · 浅色底金调（黑金质感 · 亮底版）
   ============================================================ */
:root {
  --bg: #fbf9f4;
  --bg-2: #f5f1e7;
  --bg-3: #f1ecdf;
  --panel: #ffffff;
  --line: rgba(176, 141, 46, 0.32);
  --line-soft: rgba(32, 29, 22, 0.09);
  --gold: #b8912f;
  --gold-2: #8a6d20;
  --gold-deep: #9a7a26;
  --gold-grad: linear-gradient(120deg, #e7c96b 0%, #c9a13a 45%, #a8842a 100%);
  --text: #221f17;
  --muted: #6d695c;
  --dim: #a29d8d;
  --serif: "Source Han Serif SC", "Noto Serif SC", "Songti SC", "STSong", "SimSun", Georgia, serif;
  --sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Segoe UI", system-ui, sans-serif;
  --shadow: 0 20px 50px rgba(122, 100, 40, 0.14);
  --radius: 14px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
::selection { background: rgba(201, 161, 58, 0.3); color: #221f17; }

.container { width: min(1200px, 92%); margin: 0 auto; }

/* ---------- 顶部导航 ---------- */
.header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(251, 249, 244, 0.86);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
  transition: background 0.3s, box-shadow 0.3s;
}
.header.scrolled { background: rgba(251, 249, 244, 0.97); box-shadow: 0 6px 24px rgba(122, 100, 40, 0.08); }
.nav {
  display: flex; align-items: center; justify-content: space-between;
  height: 72px;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand img { height: 42px; width: auto; }
.nav-links { display: flex; align-items: center; gap: 6px; }
.nav-links a {
  position: relative; padding: 8px 16px; font-size: 15px;
  letter-spacing: 1px; color: var(--muted); transition: color 0.25s;
}
.nav-links a:hover { color: var(--text); }
.nav-links a.active { color: var(--gold-2); font-weight: 600; }
.nav-links a.active::after, .nav-links a:hover::after {
  content: ""; position: absolute; left: 16px; right: 16px; bottom: 0;
  height: 2px; background: var(--gold-grad); border-radius: 2px;
}
.nav-cta {
  margin-left: 14px; padding: 9px 22px !important;
  border: 1px solid var(--gold); border-radius: 999px;
  color: var(--gold-2) !important; font-size: 14px;
  transition: all 0.25s;
}
.nav-cta:hover { background: var(--gold-grad); color: #fff !important; border-color: transparent; }
.nav-cta::after { display: none !important; }
.burger {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer; padding: 8px;
}
.burger span {
  width: 24px; height: 2px; background: var(--gold-deep);
  transition: all 0.3s;
}
.burger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.burger.open span:nth-child(2) { opacity: 0; }
.burger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  position: relative; min-height: 92vh;
  display: flex; align-items: center;
  padding: 140px 0 90px;
  background:
    radial-gradient(ellipse 60% 45% at 50% 0%, rgba(201, 161, 58, 0.16), transparent 70%),
    radial-gradient(ellipse 40% 35% at 85% 80%, rgba(176, 141, 46, 0.1), transparent 70%),
    linear-gradient(180deg, #fdfbf6 0%, var(--bg) 100%);
  overflow: hidden;
}
.hero::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(176, 141, 46, 0.09) 1px, transparent 1px),
    linear-gradient(90deg, rgba(176, 141, 46, 0.09) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 75% 65% at 50% 40%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 75% 65% at 50% 40%, #000 30%, transparent 75%);
}
.hero-inner { position: relative; z-index: 1; text-align: center; }
.hero-title {
  font-family: var(--serif);
  font-size: clamp(34px, 5.6vw, 62px);
  font-weight: 700; line-height: 1.28; letter-spacing: 4px;
  color: #1d1a12;
}
.hero-title .gold {
  background: var(--gold-grad);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.hero-slogan-en {
  margin: 20px auto 0; max-width: 760px;
  font-size: 13px; letter-spacing: 3.2px; text-transform: uppercase;
  color: #8a6d20; font-weight: 600;
}
.hero-sub {
  max-width: 720px; margin: 28px auto 0;
  color: var(--muted); font-size: 17px; letter-spacing: 1px;
}
.hero-actions { display: flex; gap: 18px; justify-content: center; margin-top: 46px; flex-wrap: wrap; }
.hero-net { margin: 64px auto 0; max-width: 760px; opacity: 0.95; }

/* 内页 hero */
.page-hero {
  position: relative; padding: 158px 0 80px; text-align: center;
  background:
    radial-gradient(ellipse 55% 60% at 50% 0%, rgba(201, 161, 58, 0.15), transparent 70%),
    linear-gradient(180deg, #fdfbf6, var(--bg-2));
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}
.page-hero::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(176, 141, 46, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(176, 141, 46, 0.08) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 70% 80% at 50% 30%, #000 25%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 70% 80% at 50% 30%, #000 25%, transparent 80%);
}
.page-hero-inner { position: relative; z-index: 1; }
.page-hero h1 {
  font-family: var(--serif); font-size: clamp(30px, 4.4vw, 46px);
  letter-spacing: 5px; font-weight: 700; color: #1d1a12;
}
.page-hero .crumbs {
  margin-top: 18px; font-size: 13.5px; color: var(--dim); letter-spacing: 2px;
}
.page-hero .crumbs a { color: var(--muted); transition: color 0.2s; }
.page-hero .crumbs a:hover { color: var(--gold-2); }
.page-hero .crumbs .sep { margin: 0 10px; color: var(--gold); }
.page-hero .lead {
  max-width: 680px; margin: 22px auto 0; color: var(--muted); font-size: 16px;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 36px; border-radius: 999px;
  font-size: 15px; letter-spacing: 2px; cursor: pointer;
  transition: all 0.28s; border: 1px solid transparent;
}
.btn-gold {
  background: linear-gradient(120deg, #221f17 0%, #443c26 100%);
  color: #f0d78c; font-weight: 600;
  box-shadow: 0 8px 28px rgba(34, 31, 23, 0.25);
}
.btn-gold:hover { transform: translateY(-2px); box-shadow: 0 14px 38px rgba(34, 31, 23, 0.35); }
.btn-ghost {
  border-color: var(--gold); color: var(--gold-2);
  background: rgba(201, 161, 58, 0.07);
}
.btn-ghost:hover { background: var(--gold-grad); color: #fff; }

/* ---------- 区块 ---------- */
.section { padding: 100px 0; position: relative; }
.section.alt { background: var(--bg-2); border-top: 1px solid var(--line-soft); border-bottom: 1px solid var(--line-soft); }
.section-head { text-align: center; max-width: 760px; margin: 0 auto 60px; }
.section-head .kicker {
  display: inline-block; font-size: 12.5px; letter-spacing: 5px;
  color: var(--gold-deep); margin-bottom: 16px; text-transform: uppercase;
}
.section-head .kicker::before, .section-head .kicker::after {
  content: "—"; margin: 0 12px; color: var(--gold);
}
.section-head h2 {
  font-family: var(--serif); font-size: clamp(26px, 3.4vw, 38px);
  letter-spacing: 3px; font-weight: 700; color: #1d1a12;
}
.section-head .sub { margin-top: 16px; color: var(--muted); font-size: 15.5px; }

/* ---------- 数据条 ---------- */
.stats-band {
  border-top: 1px solid var(--line); border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(201, 161, 58, 0.1), rgba(201, 161, 58, 0.03));
}
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.stat {
  text-align: center; padding: 44px 12px;
  border-left: 1px solid var(--line-soft);
}
.stat:first-child { border-left: none; }
.stat .num {
  font-family: var(--serif); font-size: clamp(30px, 3.6vw, 44px); font-weight: 700;
  background: linear-gradient(120deg, #a8842a, #d4af37);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.stat .label { margin-top: 6px; color: var(--muted); font-size: 14px; letter-spacing: 3px; }

/* ---------- 卡片 ---------- */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
.card {
  position: relative; background: var(--panel);
  border: 1px solid var(--line-soft); border-radius: var(--radius);
  padding: 38px 32px; overflow: hidden;
  box-shadow: 0 6px 24px rgba(122, 100, 40, 0.06);
  transition: transform 0.3s, border-color 0.3s, box-shadow 0.3s;
}
.card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: var(--gold-grad); transform: scaleX(0); transform-origin: left;
  transition: transform 0.35s;
}
.card:hover { transform: translateY(-6px); border-color: var(--line); box-shadow: var(--shadow); }
.card:hover::before { transform: scaleX(1); }
.card .icon {
  width: 62px; height: 62px; border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(201, 161, 58, 0.12); border: 1px solid var(--line);
  margin-bottom: 24px;
}
.card .icon svg { width: 32px; height: 32px; }
.card .en { font-size: 10.5px; letter-spacing: 3px; color: var(--gold-deep); text-transform: uppercase; }
.card h3 {
  font-family: var(--serif); font-size: 22px; letter-spacing: 2px;
  margin: 4px 0 6px; color: #1d1a12;
}
.card .tagline { font-size: 13px; color: var(--gold-2); letter-spacing: 1px; margin-bottom: 14px; }
.card p { color: var(--muted); font-size: 14.5px; }
.card .more {
  display: inline-flex; align-items: center; gap: 8px;
  margin-top: 22px; font-size: 13.5px; color: var(--gold-deep); letter-spacing: 1px;
}
.card .more:hover { color: #6f5716; }

/* ---------- 产品页 详情 ---------- */
.product-detail {
  display: grid; grid-template-columns: 1fr 1fr; gap: 60px;
  align-items: center; padding: 70px 0;
  border-bottom: 1px solid var(--line-soft);
}
.product-detail:last-of-type { border-bottom: none; }
.product-detail.flip .pd-media { order: 2; }
.pd-body .en { font-size: 12px; letter-spacing: 4px; color: var(--gold-deep); text-transform: uppercase; }
.pd-body h3 {
  font-family: var(--serif); font-size: 30px; letter-spacing: 2px; margin: 8px 0 6px; color: #1d1a12;
}
.pd-body .tagline { color: var(--gold-2); font-size: 15px; margin-bottom: 18px; letter-spacing: 1px; }
.pd-body p { color: var(--muted); }
.pd-features { margin: 24px 0 0; display: grid; gap: 12px; }
.pd-features li {
  display: flex; gap: 12px; align-items: flex-start;
  color: var(--text); font-size: 14.5px;
}
.pd-features li::before {
  content: ""; flex: none; width: 7px; height: 7px; border-radius: 2px;
  margin-top: 9px; transform: rotate(45deg);
  background: var(--gold-grad);
}
.pd-media {
  background: var(--panel);
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: 8px;
  box-shadow: 0 10px 32px rgba(122, 100, 40, 0.1);
}
.pd-media svg { width: 100%; height: auto; border-radius: 10px; }
.pd-media img { width: 100%; height: auto; border-radius: 10px; display: block; background: #fff; }
.spec-table { margin-top: 28px; border: 1px solid var(--line-soft); border-radius: 12px; overflow: hidden; }
.spec-table .row {
  display: grid; grid-template-columns: 130px 1fr;
  border-top: 1px solid var(--line-soft); font-size: 14px;
}
.spec-table .row:first-child { border-top: none; }
.spec-table .k {
  padding: 11px 18px; color: var(--dim); background: rgba(201, 161, 58, 0.05);
  letter-spacing: 1px;
}
.spec-table .v { padding: 11px 18px; color: var(--gold-2); font-weight: 600; }

/* ---------- 解决方案 ---------- */
.sol-card {
  background: var(--panel); border: 1px solid var(--line-soft);
  border-radius: var(--radius); padding: 40px 36px;
  box-shadow: 0 6px 24px rgba(122, 100, 40, 0.06);
  transition: transform 0.3s, border-color 0.3s, box-shadow 0.3s;
}
.sol-card:hover { transform: translateY(-6px); border-color: var(--line); box-shadow: var(--shadow); }
.sol-card .head { display: flex; align-items: center; gap: 16px; margin-bottom: 20px; }
.sol-card .icon {
  width: 56px; height: 56px; border-radius: 12px; flex: none;
  display: flex; align-items: center; justify-content: center;
  background: rgba(201, 161, 58, 0.12); border: 1px solid var(--line);
}
.sol-card .icon svg { width: 28px; height: 28px; }
.sol-card h3 { font-family: var(--serif); font-size: 22px; letter-spacing: 2px; color: #1d1a12; }
.sol-card .tag {
  display: inline-block; font-size: 12px; color: var(--gold-2);
  border: 1px solid var(--line); border-radius: 999px; padding: 2px 12px;
  letter-spacing: 2px; margin-top: 4px;
}
.sol-block { margin-top: 18px; }
.sol-block h4 {
  font-size: 14px; letter-spacing: 3px; color: var(--gold-deep);
  margin-bottom: 10px;
}
.sol-block h4::before { content: "◇ "; color: var(--gold); }
.sol-block li {
  position: relative; padding-left: 16px; color: var(--muted); font-size: 14px;
  margin-bottom: 6px;
}
.sol-block li::before {
  content: ""; position: absolute; left: 0; top: 10px;
  width: 6px; height: 1.5px; background: var(--gold);
}
.sol-value {
  margin-top: 22px; padding: 16px 18px; border-radius: 10px;
  background: rgba(201, 161, 58, 0.09); border-left: 3px solid var(--gold);
  color: var(--text); font-size: 14px;
}

/* ---------- 案例 ---------- */
.case-card {
  display: flex; flex-direction: column;
  background: var(--panel); border: 1px solid var(--line-soft);
  border-radius: var(--radius); overflow: hidden;
  box-shadow: 0 6px 24px rgba(122, 100, 40, 0.06);
  transition: transform 0.3s, border-color 0.3s, box-shadow 0.3s;
}
.case-card:hover { transform: translateY(-6px); border-color: var(--line); box-shadow: var(--shadow); }
.case-top {
  padding: 22px 30px; border-bottom: 1px solid var(--line-soft);
  background: linear-gradient(120deg, rgba(201, 161, 58, 0.12), transparent 60%);
}
.case-top .industry { font-size: 12.5px; letter-spacing: 2.5px; color: var(--gold-deep); }
.case-top h3 { font-family: var(--serif); font-size: 19px; margin-top: 8px; letter-spacing: 1px; line-height: 1.5; color: #1d1a12; }
.case-body { padding: 24px 30px; flex: 1; }
.case-body p { color: var(--muted); font-size: 14px; }
.case-results {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px;
  margin: 20px 0 4px;
}
.case-results .r { text-align: center; padding: 12px 6px; background: rgba(201, 161, 58, 0.08); border-radius: 10px; }
.case-results .num {
  font-family: var(--serif); font-size: 19px; font-weight: 700; color: var(--gold-2);
}
.case-results .label { font-size: 11px; color: var(--dim); margin-top: 2px; letter-spacing: 1px; }
.case-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.case-tags span {
  font-size: 11.5px; color: var(--muted); border: 1px solid var(--line-soft);
  border-radius: 999px; padding: 2px 12px; letter-spacing: 1px;
}

/* ---------- 优势 ---------- */
.feature-item {
  display: flex; gap: 20px; padding: 26px 0;
  border-bottom: 1px solid var(--line-soft);
}
.feature-item:last-child { border-bottom: none; }
.feature-item .no {
  font-family: var(--serif); font-size: 30px; font-weight: 700;
  color: transparent; -webkit-text-stroke: 1px var(--gold);
  line-height: 1.2; flex: none; width: 62px;
}
.feature-item h3 { font-family: var(--serif); font-size: 20px; letter-spacing: 2px; margin-bottom: 6px; color: #1d1a12; }
.feature-item p { color: var(--muted); font-size: 14.5px; }

/* ---------- 时间线 ---------- */
.timeline { position: relative; margin-top: 10px; }
.timeline::before {
  content: ""; position: absolute; left: 90px; top: 6px; bottom: 6px;
  width: 1.5px;
  background: linear-gradient(180deg, transparent, var(--gold) 8%, var(--gold) 92%, transparent);
}
.tl-item { display: grid; grid-template-columns: 72px 40px 1fr; padding: 18px 0; }
.tl-item .year {
  font-family: var(--serif); font-size: 19px; font-weight: 700;
  color: var(--gold-2); text-align: right; line-height: 1.5;
}
.tl-item .dot { position: relative; }
.tl-item .dot::before {
  content: ""; position: absolute; left: 14px; top: 12px;
  width: 13px; height: 13px; border-radius: 50%;
  background: var(--bg-2); border: 2px solid var(--gold);
  box-shadow: 0 0 12px rgba(201, 161, 58, 0.5);
}
.tl-item h3 { font-size: 17px; letter-spacing: 1px; color: #1d1a12; }
.tl-item p { color: var(--muted); font-size: 14px; margin-top: 4px; }

/* ---------- 价值观 ---------- */
.value-card {
  text-align: center; padding: 44px 26px;
  background: var(--panel); border: 1px solid var(--line-soft); border-radius: var(--radius);
  box-shadow: 0 6px 24px rgba(122, 100, 40, 0.06);
  transition: border-color 0.3s, transform 0.3s;
}
.value-card:hover { border-color: var(--line); transform: translateY(-4px); }
.value-card .zh {
  font-family: var(--serif); font-size: 26px; letter-spacing: 6px;
  background: linear-gradient(120deg, #a8842a, #d4af37);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.value-card p { margin-top: 14px; color: var(--muted); font-size: 14px; }

/* ---------- CTA ---------- */
.cta-band {
  position: relative; text-align: center; padding: 96px 0;
  background:
    radial-gradient(ellipse 55% 75% at 50% 100%, rgba(201, 161, 58, 0.18), transparent 70%),
    var(--bg-3);
  border-top: 1px solid var(--line);
}
.cta-band h2 { font-family: var(--serif); font-size: clamp(26px, 3.6vw, 38px); letter-spacing: 4px; color: #1d1a12; }
.cta-band p { color: var(--muted); margin: 18px 0 36px; }
.cta-band .phone-line {
  margin-top: 34px; font-size: 15px; color: var(--dim); letter-spacing: 1px;
}
.cta-band .phone-line b { color: var(--gold-2); font-family: var(--serif); font-size: 19px; letter-spacing: 2px; }

/* ---------- 联系页 ---------- */
.contact-grid { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 48px; align-items: start; }
.contact-info-card {
  background: var(--panel); border: 1px solid var(--line-soft);
  border-radius: var(--radius); padding: 40px 36px;
  box-shadow: 0 6px 24px rgba(122, 100, 40, 0.06);
}
.contact-info-card h3 { font-family: var(--serif); font-size: 23px; letter-spacing: 2px; margin-bottom: 26px; color: #1d1a12; }
.ci-row { display: flex; gap: 16px; padding: 16px 0; border-bottom: 1px solid var(--line-soft); }
.ci-row:last-child { border-bottom: none; }
.ci-row .ci-icon {
  flex: none; width: 44px; height: 44px; border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(201, 161, 58, 0.12); border: 1px solid var(--line);
}
.ci-row .ci-icon svg { width: 20px; height: 20px; }
.ci-row .k { font-size: 12.5px; color: var(--dim); letter-spacing: 2px; }
.ci-row .v { font-size: 15.5px; color: var(--text); margin-top: 2px; }
.contact-form {
  background: var(--panel); border: 1px solid var(--line-soft);
  border-radius: var(--radius); padding: 40px 36px;
  box-shadow: 0 6px 24px rgba(122, 100, 40, 0.06);
}
.contact-form h3 { font-family: var(--serif); font-size: 23px; letter-spacing: 2px; margin-bottom: 8px; color: #1d1a12; }
.contact-form .form-sub { color: var(--muted); font-size: 13.5px; margin-bottom: 26px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-field { display: flex; flex-direction: column; gap: 8px; }
.form-field.full { grid-column: 1 / -1; }
.form-field label { font-size: 13px; color: var(--muted); letter-spacing: 1.5px; }
.form-field label b { color: var(--gold-deep); }
.form-field input, .form-field select, .form-field textarea {
  background: #fdfcf8;
  border: 1px solid var(--line-soft); border-radius: 10px;
  padding: 12px 16px; color: var(--text); font-size: 14.5px;
  font-family: var(--sans); outline: none; transition: border-color 0.25s, background 0.25s;
}
.form-field select { appearance: none; background-image: linear-gradient(45deg, transparent 50%, var(--gold) 50%), linear-gradient(135deg, var(--gold) 50%, transparent 50%); background-position: calc(100% - 20px) 50%, calc(100% - 14px) 50%; background-size: 6px 6px; background-repeat: no-repeat; }
.form-field select option { background: #fff; }
.form-field textarea { min-height: 120px; resize: vertical; }
.form-field input:focus, .form-field select:focus, .form-field textarea:focus {
  border-color: var(--gold); background: rgba(201, 161, 58, 0.05);
}
.form-note { margin-top: 16px; font-size: 12.5px; color: var(--dim); }
.form-ok {
  display: none; text-align: center; padding: 40px 20px;
}
.form-ok.show { display: block; }
.form-ok .ok-ring {
  width: 74px; height: 74px; margin: 0 auto 22px; border-radius: 50%;
  border: 2px solid var(--gold); display: flex; align-items: center; justify-content: center;
  box-shadow: 0 0 30px rgba(201, 161, 58, 0.35);
}
.form-ok h4 { font-family: var(--serif); font-size: 21px; letter-spacing: 2px; color: #1d1a12; }
.form-ok p { color: var(--muted); font-size: 14px; margin-top: 10px; }

/* ---------- 页脚 ---------- */
.footer {
  background: var(--bg-2); border-top: 1px solid var(--line);
  padding: 70px 0 0;
}
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.2fr; gap: 44px; padding-bottom: 50px; }
.footer h4 {
  font-size: 15px; letter-spacing: 3px; color: var(--gold-2);
  margin-bottom: 20px; font-family: var(--serif);
}
.footer .about-txt { color: var(--muted); font-size: 13.5px; margin-top: 18px; }
.footer-slogan {
  margin-top: 20px; font-family: var(--serif);
  font-size: 15px; letter-spacing: 2px; color: #2a2519; font-weight: 600;
}
.footer-slogan::after {
  content: ""; display: block; width: 34px; height: 2px;
  background: var(--gold-grad); margin-top: 10px;
}
.footer-slogan-en {
  margin-top: 10px; color: #8a6d20; font-size: 10.5px;
  letter-spacing: 2.4px; text-transform: uppercase; font-weight: 600;
}
.footer-links li { margin-bottom: 11px; }
.footer-links a { color: var(--muted); font-size: 13.5px; transition: color 0.2s; }
.footer-links a:hover { color: var(--gold-2); }
.footer-contact li {
  display: flex; gap: 10px; color: var(--muted); font-size: 13.5px; margin-bottom: 12px;
}
.footer-contact svg { flex: none; width: 16px; height: 16px; margin-top: 4px; }
.footer-bottom {
  border-top: 1px solid var(--line-soft);
  padding: 22px 0; text-align: center;
  color: var(--dim); font-size: 12.5px; letter-spacing: 1px;
}
.footer-bottom b { color: var(--dim); font-weight: 400; }
.footer-bottom .container { display: flex; flex-wrap: wrap; gap: 4px 18px; justify-content: center; align-items: center; }
.footer-icp a { color: var(--dim); text-decoration: none; border-bottom: 1px solid transparent; transition: color .25s ease, border-color .25s ease; }
.footer-icp a:hover { color: #b8912f; border-bottom-color: currentColor; }
.footer-icp .fb-sep { display: inline-block; margin: 0 10px; color: var(--line); user-select: none; }


/* ---------- 动效 ---------- */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.in { opacity: 1; transform: none; }
.d1 { transition-delay: 0.08s; } .d2 { transition-delay: 0.16s; } .d3 { transition-delay: 0.24s; }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .grid-3 { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .product-detail { grid-template-columns: 1fr; gap: 34px; }
  .product-detail.flip .pd-media { order: 0; }
}
@media (max-width: 768px) {
  .burger { display: flex; }
  .nav-links {
    position: fixed; top: 72px; left: 0; right: 0;
    flex-direction: column; gap: 0;
    background: rgba(251, 249, 244, 0.98); border-bottom: 1px solid var(--line);
    padding: 10px 0 24px; transform: translateY(-130%); transition: transform 0.35s;
  }
  .nav-links.open { transform: none; }
  .nav-links a { padding: 14px 20px; display: block; text-align: center; }
  .nav-links a.active::after, .nav-links a:hover::after { display: none; }
  .nav-cta { margin: 14px 0 0; display: inline-block; }
  .hero { min-height: 82vh; }
  .hero-title { letter-spacing: 2px; }
  .hero-slogan-en { font-size: 11px; letter-spacing: 1.8px; line-height: 1.7; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .stat { border-left: none; border-top: 1px solid var(--line-soft); }
  .stat:nth-child(-n+2) { border-top: none; }
  .grid-3, .grid-2, .contact-grid, .form-grid { grid-template-columns: 1fr; }
  .timeline::before { left: 15px; }
  .tl-item { grid-template-columns: 34px 1fr; }
  .tl-item .year { display: none; }
  .tl-item .dot::before { left: 9px; }
  .footer-grid { grid-template-columns: 1fr; gap: 34px; }
  .section { padding: 70px 0; }
  .page-hero { padding: 140px 0 60px; }
}

/* ============================================================
   新增板块（企业介绍内容扩展）
   ============================================================ */

/* ---------- 数据注释 ---------- */
.stat .note {
  margin-top: 10px; font-size: 12px; line-height: 1.6;
  color: var(--dim); letter-spacing: 0.5px;
}

/* ---------- 网络技术要点 ---------- */
.tech-list { display: grid; gap: 14px; max-width: 900px; margin: 0 auto 46px; }
.tech-item {
  display: flex; align-items: flex-start; gap: 14px;
  padding: 16px 22px; border-radius: var(--radius);
  background: rgba(201, 161, 58, 0.07);
  border: 1px solid var(--line-soft);
  color: var(--muted); font-size: 14.5px; line-height: 1.7;
}
.tech-item svg { flex: none; width: 22px; height: 22px; margin-top: 1px; }

/* ---------- 网络拓扑图 ---------- */
.net-map {
  background: var(--panel); border: 1px solid var(--line-soft);
  border-radius: var(--radius); padding: 34px 24px 18px;
  box-shadow: 0 6px 24px rgba(122, 100, 40, 0.06);
}
.net-map svg { width: 100%; height: auto; display: block; }
.net-map .map-note {
  text-align: center; margin-top: 10px;
  font-size: 12.5px; letter-spacing: 2px; color: var(--dim);
}

/* ---------- 全国资源覆盖地图 ---------- */
.net-cover {
  background: #0e2547; border-radius: var(--radius);
  padding: 30px 26px 20px;
  box-shadow: 0 6px 24px rgba(14, 37, 71, 0.25);
  margin-bottom: 26px;
}
.net-cover-head {
  display: flex; align-items: center; justify-content: center;
  gap: 14px; flex-wrap: wrap; margin-bottom: 6px;
}
.net-cover-tag {
  display: inline-block; background: linear-gradient(135deg, #f6e27a, #a8842a);
  color: #10233f; font-weight: 700; font-size: 14px; letter-spacing: 4px;
  padding: 5px 16px 5px 20px; border-radius: 4px;
}
.net-cover-desc { color: #b9cce4; font-size: 13px; letter-spacing: 2px; }
.china-map-svg { width: 100%; height: auto; display: block; }

/* 省份板块交互 */
.china-map-svg .cn-prov { cursor: pointer; transition: fill .18s ease, filter .18s ease; }
.china-map-svg .cn-prov--pop { fill: #4a8ec9; filter: drop-shadow(0 0 3px rgba(95, 161, 216, 0.35)); }
.china-map-svg .cn-prov--pop:hover { fill: #6fb0e0; filter: drop-shadow(0 0 6px rgba(120, 180, 230, 0.55)); }
.china-map-svg .cn-prov--nopop { fill: #16345c; opacity: 0.65; }
.china-map-svg .cn-prov--nopop:hover { fill: #1d4067; cursor: default; }
.china-map-svg .cn-prov--selected { fill: #f0c33c !important; stroke: #fff; stroke-width: 1.2; filter: drop-shadow(0 0 8px rgba(240, 195, 60, 0.6)); }
.china-map-svg .cn-prov--selected .cn-pop-label { fill: #10233f; }

/* POP 点 */
.china-map-svg .cn-pop { pointer-events: none; }
.china-map-svg .cn-pop-label { pointer-events: none; transition: fill .18s ease; }
.china-map-svg .cn-prov--selected ~ .cn-pops .cn-pop-label { fill: #e8eef6; }

/* 图例 */
.china-map-svg .cn-legend { font-family: inherit; }

/* 点击省份后的详情卡片 */
.net-cover-detail {
  margin-top: 18px; padding: 16px 20px;
  background: rgba(255, 255, 255, 0.06);
  border-left: 3px solid #f0c33c; border-radius: 4px;
  color: #e8eef6; font-size: 14px; line-height: 1.7;
  display: none;
}
.net-cover-detail.show { display: block; animation: fadeIn .25s ease; }
.net-cover-detail .detail-name {
  font-size: 17px; font-weight: 700; color: #f6e27a;
  letter-spacing: 2px; margin-bottom: 4px;
}
.net-cover-detail .detail-meta { color: #b9cce4; font-size: 13px; letter-spacing: 1px; }
.net-cover-detail .detail-meta strong { color: #f0c33c; font-size: 15px; }
.net-cover-hint {
  margin-top: 10px; color: #7f9cc0; font-size: 12px;
  letter-spacing: 1px; text-align: center;
}
@keyframes fadeIn { from { opacity: 0; transform: translateY(-4px); } to { opacity: 1; transform: none; } }

@media (max-width: 720px) {
  .net-cover { padding: 20px 10px 12px; }
  .net-cover-tag { font-size: 12.5px; letter-spacing: 2px; }
  .net-cover-desc { font-size: 11.5px; }
  .net-cover-detail { padding: 12px 14px; font-size: 13px; }
}

/* ---------- 交付能力 ---------- */
.deliver-block {
  padding: 54px 0; border-bottom: 1px solid var(--line-soft);
}
.deliver-block:last-child { border-bottom: none; }
.deliver-head {
  display: flex; align-items: center; justify-content: space-between;
  gap: 24px; flex-wrap: wrap; margin-bottom: 14px;
}
.deliver-head h3 {
  font-family: var(--serif); font-size: clamp(21px, 2.6vw, 27px);
  letter-spacing: 2px; color: #1d1a12;
}
.deliver-head .hl {
  display: flex; align-items: baseline; gap: 12px;
  padding: 8px 20px; border-radius: 999px;
  border: 1px solid var(--line); background: rgba(201, 161, 58, 0.08);
}
.deliver-head .hl b {
  font-family: var(--serif); font-size: 24px;
  color: var(--gold-2); letter-spacing: 1px;
}
.deliver-head .hl span { font-size: 12.5px; color: var(--muted); letter-spacing: 1px; }
.deliver-desc {
  max-width: 880px; color: var(--muted); font-size: 15px; line-height: 1.85;
}
.feature-list { max-width: 900px; margin-top: 26px; }

/* ---------- 标准化交付流程 ---------- */
.step-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 22px; margin-top: 34px;
}
.step-card {
  position: relative; background: var(--panel);
  border: 1px solid var(--line-soft); border-radius: var(--radius);
  padding: 30px 26px 26px;
  box-shadow: 0 6px 24px rgba(122, 100, 40, 0.05);
  transition: transform 0.3s, border-color 0.3s;
}
.step-card:hover { transform: translateY(-4px); border-color: var(--line); }
.step-card .sn {
  font-family: var(--serif); font-size: 26px; font-weight: 700;
  background: var(--gold-grad); -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.step-card h4 {
  font-family: var(--serif); font-size: 17.5px; letter-spacing: 1.5px;
  color: #1d1a12; margin: 8px 0 10px; font-weight: 700;
}
.step-card p { color: var(--muted); font-size: 13.5px; line-height: 1.75; }

.footnote {
  margin-top: 26px; max-width: 900px;
  padding-left: 16px; border-left: 2px solid var(--line);
  color: var(--dim); font-size: 13.5px; line-height: 1.8;
}

/* ---------- SLA ---------- */
.sla-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 18px; margin-top: 30px;
}
.sla-item {
  text-align: center; padding: 30px 14px;
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(201, 161, 58, 0.12), rgba(201, 161, 58, 0.03));
  border: 1px solid var(--line-soft);
}
.sla-item .num {
  font-family: var(--serif); font-size: clamp(26px, 3.2vw, 36px); font-weight: 700;
  background: var(--gold-grad); -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.sla-item .label { margin-top: 8px; color: var(--muted); font-size: 13.5px; letter-spacing: 2px; }
.sla-note { margin-top: 20px; color: var(--dim); font-size: 13.5px; }

/* ---------- 核心团队 ---------- */
.team-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px;
}
.team-card {
  text-align: center; padding: 34px 22px;
  background: var(--panel); border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  box-shadow: 0 6px 24px rgba(122, 100, 40, 0.05);
}
.team-card .num {
  font-family: var(--serif); font-size: clamp(26px, 3vw, 34px); font-weight: 700;
  background: var(--gold-grad); -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.team-card .label {
  margin-top: 8px; color: #1d1a12; font-size: 14px; letter-spacing: 1.5px;
}
.team-card p { margin-top: 10px; color: var(--muted); font-size: 12.5px; line-height: 1.7; }

/* ---------- 团队风采（真实团建照片） ---------- */
.member-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px;
}
.member-card {
  background: var(--panel); border: 1px solid var(--line-soft);
  border-radius: var(--radius); overflow: hidden;
  box-shadow: 0 6px 24px rgba(122, 100, 40, 0.05);
  transition: transform .35s ease, box-shadow .35s ease, border-color .35s ease;
}
.member-card:hover {
  transform: translateY(-6px); border-color: var(--line); box-shadow: var(--shadow);
}
.member-card .photo {
  position: relative; aspect-ratio: 4 / 3; overflow: hidden; background: #efe9dc;
}
.member-card .photo img {
  width: 100%; height: 100%; object-fit: cover; display: block;
  transition: transform .5s ease;
}
.member-card:hover .photo img { transform: scale(1.03); }
.member-card .info { padding: 16px 18px 20px; text-align: center; }
.member-card .cap {
  font-family: var(--serif); font-size: 15.5px; font-weight: 700; color: #1d1a12;
  letter-spacing: 1px;
}
.member-card .info p {
  margin-top: 6px; color: var(--muted); font-size: 12.5px; line-height: 1.7;
  letter-spacing: .5px;
}

/* ---------- 资质证书 ---------- */
.qual-card {
  position: relative; background: var(--panel);
  border: 1px solid var(--line-soft); border-radius: var(--radius);
  padding: 36px 30px; overflow: hidden;
  box-shadow: 0 6px 24px rgba(122, 100, 40, 0.06);
  transition: transform 0.3s, border-color 0.3s;
}
.qual-card:hover { transform: translateY(-6px); border-color: var(--line); }
.qual-card .q-icon {
  width: 56px; height: 56px; border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(201, 161, 58, 0.12); border: 1px solid var(--line);
  margin-bottom: 20px;
}
.qual-card .q-icon svg { width: 28px; height: 28px; }
.qual-card .q-en {
  font-size: 10.5px; letter-spacing: 2.5px; color: var(--gold-deep);
  text-transform: uppercase;
}
.qual-card h3 {
  font-family: var(--serif); font-size: 19px; letter-spacing: 1.5px;
  color: #1d1a12; margin: 6px 0 14px; line-height: 1.5;
}
.qual-card .q-no {
  display: inline-block; padding: 3px 12px; border-radius: 999px;
  border: 1px solid var(--line); background: rgba(201, 161, 58, 0.08);
  color: var(--gold-2); font-size: 12px; letter-spacing: 1.5px;
}
.qual-card .q-valid { margin-top: 12px; font-size: 12.5px; color: var(--dim); }
.qual-card p { margin-top: 14px; color: var(--muted); font-size: 13.5px; line-height: 1.8; }

/* ---------- 案例置顶标记 ---------- */
.case-card { position: relative; }
.case-card.featured { border-color: var(--line); box-shadow: var(--shadow); }
.case-flag {
  display: inline-block; margin-bottom: 14px;
  padding: 3px 12px; border-radius: 999px;
  background: var(--gold-grad); color: #fffdf8;
  font-size: 11px; letter-spacing: 2px;
}
.case-badge {
  margin-top: 10px; font-size: 12.5px; color: var(--gold-2);
  letter-spacing: 1px; line-height: 1.6;
}
.case-results.cols-2 { grid-template-columns: repeat(2, 1fr); }

/* ---------- 发展历程脚注 ---------- */
.tl-footnote { margin: 34px auto 0; max-width: 820px; }

/* ---------- 发展历程 · 横向台阶式里程碑 ---------- */
.ms-track {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  align-items: end;
  position: relative;
  padding: 30px 4px 40px;
  margin: 10px 0 4px;
}
.ms-track::after {
  content: "";
  position: absolute;
  left: 5%;
  right: 5%;
  bottom: 47px;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--gold) 6%, var(--gold) 94%, transparent);
  border-radius: 2px;
}
.ms-step {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  width: 100%;
}
.ms-card {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--line-soft);
  border-radius: 14px;
  padding: 26px 22px 22px;
  text-align: center;
  width: 100%;
  box-shadow: 0 12px 32px rgba(122, 100, 40, 0.08);
  transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease;
  z-index: 2;
}
.ms-step:hover .ms-card {
  transform: translateY(-4px);
  box-shadow: 0 20px 44px rgba(122, 100, 40, 0.16);
  border-color: var(--line);
}
.ms-step:last-child .ms-card {
  border-color: var(--line);
  background: linear-gradient(180deg, #fffdf7 0%, #fdf8ea 100%);
}
.ms-year {
  font-family: var(--serif);
  font-size: 40px;
  font-weight: 700;
  letter-spacing: 3px;
  background: linear-gradient(120deg, #a8842a, #d4af37);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  line-height: 1.05;
  margin-bottom: 6px;
}
.ms-title {
  font-size: 17px;
  letter-spacing: 1px;
  color: #1d1a12;
  margin: 4px 0 10px;
  padding-bottom: 10px;
  position: relative;
}
.ms-title::after {
  content: "";
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  bottom: 0;
  width: 26px;
  height: 1.5px;
  background: var(--gold);
  border-radius: 2px;
}
.ms-desc {
  color: var(--muted);
  font-size: 13.5px;
  line-height: 1.75;
}
.ms-stem {
  width: 1.5px;
  height: 20px;
  margin-top: -1px;
  background: linear-gradient(180deg, var(--gold), var(--gold) 70%, transparent);
}
.ms-node {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--bg-2);
  border: 2.5px solid var(--gold);
  box-shadow: 0 0 14px rgba(201, 161, 58, 0.55);
  z-index: 3;
  flex: 0 0 auto;
}
.ms-step:last-child .ms-node {
  background: var(--gold);
  box-shadow: 0 0 18px rgba(201, 161, 58, 0.75);
}

/* 「上升台阶」感 = 茎长度递增：2009 节点距卡片最近，2024 最远（每根茎完整连接卡片和节点） */
.ms-step:nth-child(1) .ms-stem { height: 20px; }
.ms-step:nth-child(2) .ms-stem { height: 46px; }
.ms-step:nth-child(3) .ms-stem { height: 80px; }
.ms-step:nth-child(4) .ms-stem { height: 130px; }

.ms-footnote {
  margin: 30px auto 0;
  max-width: 820px;
  text-align: center;
  color: var(--dim);
  font-size: 13px;
}

/* ---------- 新增板块响应式 ---------- */
@media (max-width: 1024px) {
  .step-grid { grid-template-columns: 1fr 1fr; }
  .team-grid { grid-template-columns: 1fr 1fr; }
  .member-grid { grid-template-columns: 1fr 1fr 1fr; gap: 14px; }
  .sla-grid { grid-template-columns: 1fr 1fr 1fr; }
  .ms-track { grid-template-columns: 1fr 1fr; }
  .ms-step:nth-child(n) { padding-top: 0; }
  .ms-step:nth-child(2n) { padding-top: 0; }
  .ms-track::after { left: 12%; right: 12%; }
}
@media (max-width: 768px) {
  .step-grid, .team-grid, .member-grid, .sla-grid { grid-template-columns: 1fr; }
  .deliver-block { padding: 40px 0; }
  .deliver-head { flex-direction: column; align-items: flex-start; gap: 14px; }
  .tech-item { padding: 14px 16px; font-size: 13.5px; }
  .net-map { padding: 22px 12px 14px; }
  .qual-card { padding: 30px 24px; }
  .ms-track { grid-template-columns: 1fr; padding-bottom: 30px; }
  .ms-track::after { display: none; }
  .ms-stem, .ms-node { display: none; }
}

/* ============================================================
   关于我们 · 二级导航（导航条下拉 + 页面内标签条）
   ============================================================ */
.nav-sub { position: relative; }
.nav-sub .nav-parent { display: inline-flex; align-items: center; }
.nav-sub .caret {
  display: inline-block; margin-left: 6px; width: 0; height: 0;
  border-left: 4px solid transparent; border-right: 4px solid transparent;
  border-top: 5px solid currentColor; opacity: .65;
  transition: transform .25s;
}
.nav-sub:hover .caret, .nav-sub.open .caret { transform: rotate(180deg); }
.sub-nav {
  position: absolute; top: 100%; left: 50%;
  transform: translateX(-50%) translateY(8px);
  min-width: 156px; padding: 8px;
  background: var(--panel); border: 1px solid var(--line);
  border-radius: 12px; box-shadow: var(--shadow);
  opacity: 0; visibility: hidden; pointer-events: none;
  transition: opacity .25s, transform .25s, visibility .25s;
  z-index: 120;
}
.sub-nav::before { content: ""; position: absolute; top: -12px; left: 0; right: 0; height: 12px; }
.nav-sub:hover .sub-nav, .nav-sub:focus-within .sub-nav {
  opacity: 1; visibility: visible; pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}
.nav-links .sub-nav a {
  position: relative; display: block; padding: 9px 16px;
  font-size: 14px; letter-spacing: 1px; color: var(--muted);
  border-radius: 8px; white-space: nowrap;
  transition: background .2s, color .2s;
}
.nav-links .sub-nav a::after { display: none !important; }
.nav-links .sub-nav a:hover { background: rgba(201, 161, 58, .1); color: var(--gold-2); }
.nav-links .sub-nav a.cur { color: var(--gold-2); font-weight: 600; background: rgba(201, 161, 58, .08); }
.nav-links .nav-parent.active { color: var(--gold-2); font-weight: 600; }

/* ---------- 关于我们 · 页面内二级标签条 ---------- */
.sub-tabs {
  position: sticky; top: 72px; z-index: 60;
  background: rgba(251, 249, 244, .96);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line-soft);
}
.sub-tabs-inner { display: flex; gap: 8px; padding: 12px 0; overflow-x: auto; }
.sub-tabs a {
  flex: 0 0 auto; padding: 8px 18px; border-radius: 999px;
  font-size: 14px; letter-spacing: 1px; color: var(--muted);
  border: 1px solid transparent; transition: background .25s, color .25s;
}
.sub-tabs a:hover { color: var(--gold-2); background: rgba(201, 161, 58, .09); }
.sub-tabs a.cur { color: #fffdf8; background: var(--gold-grad); font-weight: 600; }

/* 二级标签 · 移动端「更多」折叠（JS 注入） */
.sub-tabs-inner.st-collapsed { overflow: visible; }
.st-more { position: relative; flex: 0 0 auto; }
.st-more-btn {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 7px 14px; border-radius: 999px; font-size: 13px; letter-spacing: 1px;
  color: var(--muted); background: transparent; border: 1px solid var(--line);
  cursor: pointer; font-family: inherit; transition: background .25s, color .25s;
}
.st-more-btn .st-caret { font-size: 10px; line-height: 1; transition: transform .25s; }
.st-more.open .st-caret { transform: rotate(180deg); }
.st-more-btn.cur { color: #fffdf8; background: var(--gold-grad); border-color: transparent; font-weight: 600; }
.st-more-menu {
  display: none; position: absolute; top: calc(100% + 8px); left: 0; min-width: 128px;
  background: #fffdf8; border: 1px solid var(--line-soft); border-radius: 12px;
  box-shadow: 0 12px 32px rgba(122, 100, 40, .16); padding: 6px; z-index: 70;
}
.st-more.open .st-more-menu { display: block; }
.st-more-menu a {
  display: block; padding: 10px 14px; border-radius: 8px;
  font-size: 14px; color: var(--muted); white-space: nowrap;
}
.st-more-menu a:hover { color: var(--gold-2); background: rgba(201, 161, 58, .09); }
.st-more-menu a.cur { color: var(--gold-2); font-weight: 600; background: rgba(201, 161, 58, .09); }

@media (max-width: 768px) {
  .nav-sub { width: 100%; }
  .nav-links .nav-parent { justify-content: center; }
  .sub-nav {
    position: static; transform: none; opacity: 1; visibility: visible;
    pointer-events: auto; display: none;
    min-width: 0; padding: 0 0 6px; margin: 0;
    background: transparent; border: none; box-shadow: none;
  }
  .sub-nav::before { display: none; }
  .nav-sub.open .sub-nav { display: block; }
  .nav-links .sub-nav a { text-align: center; padding: 11px 20px; font-size: 14px; }
  .sub-tabs { top: 72px; }
  .sub-tabs-inner { padding: 10px 0; }
  .sub-tabs a { padding: 7px 14px; font-size: 13px; }
}


/* ---------------- 资质证书图 & 灯箱 ---------------- */
.cert-thumbs { display: flex; gap: 14px; margin-bottom: 22px; align-items: flex-start; flex-wrap: wrap; }
.cert-thumb {
  flex: 1 1 0; min-width: 0; display: block; background: #fff;
  border: 1px solid var(--line); border-radius: 8px;
  box-shadow: 0 8px 22px rgba(60, 48, 16, .10);
  cursor: zoom-in; transition: transform .18s ease, box-shadow .18s ease;
}
.cert-thumb:only-child { flex: 0 1 72%; margin: 0 auto; }
.cert-thumb:hover { transform: translateY(-3px); box-shadow: 0 12px 26px rgba(60, 48, 16, .16); }
.lightbox {
  position: fixed; inset: 0; z-index: 300; display: none;
  align-items: center; justify-content: center; padding: 28px;
  background: rgba(24, 19, 8, .8); cursor: zoom-out;
}
.lightbox.open { display: flex; }
.lightbox img {
  max-width: min(92vw, 720px); max-height: 92vh;
  border-radius: 10px; box-shadow: 0 24px 80px rgba(0, 0, 0, .55);
}

/* ---------------- 机房实景照片 ---------------- */
.idc-gallery { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.idc-photo {
  margin: 0; border-radius: 14px; overflow: hidden;
  border: 1px solid var(--line); box-shadow: 0 18px 44px rgba(60, 48, 16, .14);
  background: #fff; transition: transform .25s ease, box-shadow .25s ease;
}
.idc-photo:hover { transform: translateY(-4px); box-shadow: 0 24px 52px rgba(60, 48, 16, .2); }
.idc-photo img { display: block; width: 100%; height: 100%; object-fit: cover; aspect-ratio: 3 / 4; }
@media (max-width: 768px) { .idc-gallery { grid-template-columns: 1fr; } }