/* ==========================================================================
   深圳市万艺达精密科技有限公司 - 企业官网全局样式
   风格：简约大气 · 精密工业 · 石墨蓝 + 金铜
   ========================================================================== */

:root {
  --navy-950: #060d17;
  --navy-900: #0a1626;
  --navy-800: #0f2036;
  --navy-700: #16304f;
  --navy-600: #1e3d63;
  --gold: #c8a25e;
  --gold-soft: #dfc48f;
  --gold-pale: #f0e3c6;
  --ink: #1b2430;
  --gray: #5d6b7a;
  --gray-light: #8a97a5;
  --line: #e7eaf0;
  --line-dark: rgba(255, 255, 255, 0.1);
  --bg: #f6f8fa;
  --white: #ffffff;
  --shadow-sm: 0 1px 3px rgba(15, 32, 54, 0.06);
  --shadow-md: 0 10px 34px rgba(15, 32, 54, 0.1);
  --shadow-lg: 0 24px 64px rgba(15, 32, 54, 0.16);
  --serif: Georgia, "Times New Roman", "Songti SC", "SimSun", serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --radius: 6px;
}

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

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--sans);
  color: var(--ink);
  background: var(--white);
  line-height: 1.75;
  font-size: 15px;
  letter-spacing: 0.2px;
  -webkit-font-smoothing: antialiased;
}

img, svg { display: block; }
a { text-decoration: none; color: inherit; }
ul, ol { list-style: none; }
button { font-family: inherit; }

::selection { background: var(--gold); color: var(--navy-900); }

.container { max-width: 1200px; margin: 0 auto; padding: 0 28px; }

/* ==========================================================================
   顶部工具条
   ========================================================================== */
.topbar {
  background: var(--navy-950);
  color: rgba(255, 255, 255, 0.62);
  font-size: 12.5px;
}
.topbar-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 38px;
}
.topbar .topbar-contacts {
  display: flex;
  gap: 26px;
}
.topbar a { display: inline-flex; align-items: center; gap: 7px; transition: color 0.25s; }
.topbar a:hover { color: var(--gold-soft); }
.topbar .icon { width: 13px; height: 13px; color: var(--gold); }
.topbar-right {
  display: inline-flex;
  align-items: center;
  gap: 18px;
  font-style: italic;
  font-family: var(--serif);
  letter-spacing: 1.5px;
  text-transform: uppercase;
}
.topbar-right .dot { width: 3px; height: 3px; border-radius: 50%; background: var(--gold); }

/* ==========================================================================
   导航
   ========================================================================== */
.header {
  position: sticky;
  top: 0;
  z-index: 200;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
  transition: box-shadow 0.3s;
}
.header.scrolled { box-shadow: var(--shadow-md); }
.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 76px;
}
.brand { display: flex; align-items: center; gap: 14px; }
.brand-mark { height: 40px; width: auto; flex-shrink: 0; }
.brand-text { line-height: 1.25; }
.brand-text .brand-cn {
  font-size: 18px;
  font-weight: 700;
  color: var(--navy-900);
  letter-spacing: 2px;
}
.brand-text .brand-en {
  font-size: 10px;
  font-family: var(--serif);
  font-style: italic;
  letter-spacing: 2.6px;
  color: var(--gold);
  text-transform: uppercase;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 40px;
}
.nav-links a {
  position: relative;
  font-size: 15px;
  color: var(--ink);
  padding: 6px 0;
  letter-spacing: 1px;
  transition: color 0.25s;
}
.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background: var(--gold);
  transition: width 0.3s ease;
}
.nav-links a:hover { color: var(--navy-700); }
.nav-links a:hover::after { width: 100%; }
.nav-links a.active { color: var(--navy-900); font-weight: 600; }
.nav-links a.active::after { width: 100%; }
.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  background: var(--navy-800);
  color: #fff;
  font-size: 13.5px;
  letter-spacing: 1px;
  padding: 11px 22px;
  border: 1px solid var(--navy-800);
  transition: all 0.3s;
}
.nav-cta:hover { background: var(--gold); border-color: var(--gold); color: var(--navy-900); }
.nav-cta .icon { width: 14px; height: 14px; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--navy-900);
  transition: all 0.3s;
}
.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); }

/* ==========================================================================
   通用按钮
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 15px 34px;
  font-size: 14.5px;
  letter-spacing: 2px;
  cursor: pointer;
  transition: all 0.3s;
  border: 1px solid transparent;
}
.btn .icon { width: 15px; height: 15px; transition: transform 0.3s; }
.btn:hover .icon { transform: translateX(4px); }
.btn-gold {
  background: var(--gold);
  color: var(--navy-900);
  font-weight: 600;
}
.btn-gold:hover { background: var(--gold-soft); box-shadow: 0 10px 26px rgba(200, 162, 94, 0.4); }
.btn-outline-light {
  border-color: rgba(255, 255, 255, 0.4);
  color: #fff;
}
.btn-outline-light:hover { border-color: var(--gold); color: var(--gold); }
.btn-outline-dark {
  border-color: var(--navy-800);
  color: var(--navy-800);
}
.btn-outline-dark:hover { background: var(--navy-800); color: #fff; }

/* ==========================================================================
   首页 Hero
   ========================================================================== */
.hero {
  position: relative;
  background:
    radial-gradient(ellipse at 75% 15%, rgba(200, 162, 94, 0.08), transparent 55%),
    linear-gradient(135deg, var(--navy-950) 0%, var(--navy-900) 45%, var(--navy-800) 100%);
  color: #fff;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(ellipse at 70% 40%, #000 20%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at 70% 40%, #000 20%, transparent 75%);
  pointer-events: none;
}
.hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
  opacity: 0.55;
}
.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 60px;
  align-items: center;
  padding: 108px 0 118px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 12.5px;
  letter-spacing: 4px;
  color: var(--gold-soft);
  border: 1px solid rgba(200, 162, 94, 0.4);
  padding: 8px 18px;
  margin-bottom: 30px;
}
.hero-badge::before {
  content: "";
  width: 26px;
  height: 1px;
  background: var(--gold);
}
.hero h1 {
  font-size: clamp(34px, 4.6vw, 56px);
  font-weight: 700;
  line-height: 1.28;
  letter-spacing: 3px;
  margin-bottom: 26px;
}
.hero h1 em {
  font-style: normal;
  color: var(--gold);
}
.hero-desc {
  color: rgba(255, 255, 255, 0.68);
  font-size: 16px;
  max-width: 520px;
  margin-bottom: 44px;
}
.hero-actions { display: flex; gap: 18px; flex-wrap: wrap; }
.hero-visual { position: relative; display: flex; justify-content: center; }
.hero-visual .blueprint {
  width: min(100%, 470px);
  height: auto;
  color: var(--gold);
  filter: drop-shadow(0 24px 50px rgba(0, 0, 0, 0.45));
}
.hero-visual .bp-anim { animation: dashflow 5.5s linear infinite; }
@keyframes dashflow { to { stroke-dashoffset: -104; } }
.hero-corner {
  position: absolute;
  width: 56px;
  height: 56px;
  border: 1px solid rgba(200, 162, 94, 0.4);
}
.hero-corner.tl { top: 12px; left: -4px; border-right: none; border-bottom: none; }
.hero-corner.br { bottom: -4px; right: -4px; border-left: none; border-top: none; }
.hero-scroll {
  position: absolute;
  left: 50%;
  bottom: 26px;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: rgba(255, 255, 255, 0.45);
  font-size: 11px;
  letter-spacing: 3px;
  writing-mode: vertical-rl;
}
.hero-scroll::after {
  content: "";
  width: 1px;
  height: 42px;
  background: linear-gradient(var(--gold), transparent);
  animation: pulldown 2s ease-in-out infinite;
}
@keyframes pulldown { 0%, 100% { transform: scaleY(0.4); transform-origin: top; } 50% { transform: scaleY(1); transform-origin: top; } }

/* ==========================================================================
   数据统计
   ========================================================================== */
.stats {
  background: var(--white);
  border-bottom: 1px solid var(--line);
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}
.stat {
  padding: 52px 20px;
  text-align: center;
  position: relative;
}
.stat + .stat::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 1px;
  height: 56px;
  background: var(--line);
}
.stat-num {
  font-size: 46px;
  font-weight: 300;
  color: var(--navy-800);
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
}
.stat-num .unit {
  font-size: 22px;
  color: var(--gold);
  margin-left: 3px;
  font-family: var(--serif);
  font-style: italic;
}
.stat-label {
  margin-top: 10px;
  font-size: 13.5px;
  color: var(--gray);
  letter-spacing: 2px;
}

/* ==========================================================================
   通用 Section
   ========================================================================== */
.section { padding: 100px 0; }
.section.bg-gray { background: var(--bg); }
.section-head { text-align: center; max-width: 680px; margin: 0 auto 64px; }
.section-head .tag {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--serif);
  font-style: italic;
  font-size: 13px;
  letter-spacing: 3.5px;
  color: var(--gold);
  text-transform: uppercase;
  margin-bottom: 16px;
}
.section-head .tag::before,
.section-head .tag::after {
  content: "";
  width: 30px;
  height: 1px;
  background: var(--gold);
  opacity: 0.6;
}
.section-title {
  font-size: clamp(26px, 3vw, 36px);
  font-weight: 700;
  color: var(--navy-900);
  letter-spacing: 2.5px;
  line-height: 1.35;
}
.section-sub {
  margin-top: 16px;
  color: var(--gray);
  font-size: 15px;
}

/* 深色 section */
.section.dark {
  background:
    radial-gradient(ellipse at 15% 90%, rgba(200, 162, 94, 0.07), transparent 50%),
    linear-gradient(150deg, var(--navy-950), var(--navy-800));
  color: #fff;
}
.section.dark .section-title { color: #fff; }
.section.dark .section-sub { color: rgba(255, 255, 255, 0.62); }

/* ==========================================================================
   核心业务卡片
   ========================================================================== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.service-card {
  background: var(--white);
  border: 1px solid var(--line);
  padding: 40px 30px 36px;
  position: relative;
  transition: all 0.35s ease;
  overflow: hidden;
}
.service-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--gold), var(--gold-soft));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s ease;
}
.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: transparent;
}
.service-card:hover::before { transform: scaleX(1); }
.service-icon {
  width: 54px;
  height: 54px;
  color: var(--gold);
  margin-bottom: 24px;
}
.service-num {
  position: absolute;
  top: 28px;
  right: 26px;
  font-family: var(--serif);
  font-style: italic;
  font-size: 34px;
  font-weight: 700;
  color: rgba(15, 32, 54, 0.07);
}
.service-card h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--navy-900);
  letter-spacing: 1.5px;
  margin-bottom: 12px;
}
.service-card p { font-size: 13.8px; color: var(--gray); margin-bottom: 18px; }
.service-link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 13px;
  color: var(--navy-700);
  font-weight: 600;
  letter-spacing: 1px;
}
.service-link .icon { width: 14px; height: 14px; color: var(--gold); transition: transform 0.3s; }
.service-card:hover .service-link .icon { transform: translateX(4px); }

/* ==========================================================================
   制造能力（深色）
   ========================================================================== */
.cap-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 70px;
  align-items: center;
}
.cap-list { display: grid; gap: 26px; }
.cap-item {
  display: flex;
  gap: 20px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--line-dark);
}
.cap-item:last-child { border-bottom: none; padding-bottom: 0; }
.cap-item .icon-box {
  width: 50px;
  height: 50px;
  flex-shrink: 0;
  border: 1px solid rgba(200, 162, 94, 0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--gold);
}
.cap-item .icon-box .icon { width: 24px; height: 24px; }
.cap-item h3 {
  font-size: 16.5px;
  font-weight: 600;
  letter-spacing: 1.5px;
  margin-bottom: 6px;
  color: #fff;
}
.cap-item p { font-size: 13.8px; color: rgba(255, 255, 255, 0.58); }
.cap-visual {
  position: relative;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.09);
  padding: 44px 40px;
}
.cap-visual::before {
  content: "";
  position: absolute;
  top: 10px;
  left: 10px;
  right: 10px;
  bottom: 10px;
  border: 1px dashed rgba(200, 162, 94, 0.25);
  pointer-events: none;
}
.spec-table { width: 100%; border-collapse: collapse; position: relative; }
.spec-table caption {
  text-align: left;
  font-family: var(--serif);
  font-style: italic;
  font-size: 13px;
  letter-spacing: 2.5px;
  color: var(--gold);
  text-transform: uppercase;
  padding-bottom: 20px;
}
.spec-table th, .spec-table td {
  text-align: left;
  padding: 13px 8px;
  font-size: 13.8px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.82);
  font-weight: 400;
}
.spec-table th {
  color: var(--gold-soft);
  font-size: 12.5px;
  letter-spacing: 2px;
  border-bottom: 1px solid rgba(200, 162, 94, 0.35);
}
.spec-table td:first-child { color: #fff; font-weight: 500; }

/* ==========================================================================
   应用行业
   ========================================================================== */
.industries {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
}
.industry {
  background: var(--white);
  border: 1px solid var(--line);
  padding: 36px 18px;
  text-align: center;
  transition: all 0.3s;
}
.industry:hover {
  border-color: var(--gold);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.industry .icon {
  width: 38px;
  height: 38px;
  margin: 0 auto 16px;
  color: var(--gold);
}
.industry h3 { font-size: 16px; font-weight: 600; color: var(--navy-900); letter-spacing: 1.5px; }
.industry p { font-size: 12.5px; color: var(--gray-light); margin-top: 6px; }

/* ==========================================================================
   品质承诺 & 流程
   ========================================================================== */
.quality-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 90px;
}
.quality-card {
  position: relative;
  background: var(--white);
  border: 1px solid var(--line);
  padding: 42px 34px;
  transition: all 0.3s;
}
.quality-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
.quality-card .q-mark {
  font-family: var(--serif);
  font-style: italic;
  font-size: 15px;
  color: var(--gold);
  margin-bottom: 18px;
  letter-spacing: 2px;
}
.quality-card h3 { font-size: 18px; font-weight: 600; color: var(--navy-900); margin-bottom: 10px; letter-spacing: 1px; }
.quality-card p { font-size: 13.8px; color: var(--gray); }

.process { display: grid; grid-template-columns: repeat(6, 1fr); gap: 14px; position: relative; }
.process::before {
  content: "";
  position: absolute;
  top: 27px;
  left: 7%;
  right: 7%;
  height: 1px;
  background: repeating-linear-gradient(90deg, var(--gold) 0 8px, transparent 8px 16px);
  opacity: 0.55;
}
.step { text-align: center; position: relative; }
.step-num {
  width: 54px;
  height: 54px;
  margin: 0 auto 20px;
  border-radius: 50%;
  background: var(--white);
  border: 1px solid var(--gold);
  color: var(--navy-800);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--serif);
  font-style: italic;
  font-size: 19px;
  font-weight: 700;
  position: relative;
  z-index: 1;
  transition: all 0.3s;
}
.step:hover .step-num { background: var(--gold); color: var(--navy-900); }
.step h3 { font-size: 15.5px; font-weight: 600; color: var(--navy-900); margin-bottom: 6px; letter-spacing: 1px; }
.step p { font-size: 12.5px; color: var(--gray-light); line-height: 1.6; }

/* ==========================================================================
   CTA 横幅
   ========================================================================== */
.cta {
  position: relative;
  background:
    radial-gradient(ellipse at 85% 20%, rgba(200, 162, 94, 0.12), transparent 55%),
    linear-gradient(120deg, var(--navy-950), var(--navy-800));
  color: #fff;
  text-align: center;
  padding: 96px 0;
  overflow: hidden;
}
.cta::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: radial-gradient(ellipse at center, #000 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse at center, #000 30%, transparent 80%);
}
.cta-inner { position: relative; }
.cta h2 {
  font-size: clamp(24px, 3vw, 34px);
  letter-spacing: 3px;
  margin-bottom: 16px;
}
.cta h2 em { font-style: normal; color: var(--gold); }
.cta p { color: rgba(255, 255, 255, 0.6); margin-bottom: 40px; font-size: 15px; }
.cta-actions { display: flex; justify-content: center; gap: 18px; flex-wrap: wrap; }

/* ==========================================================================
   内页 Hero
   ========================================================================== */
.page-hero {
  position: relative;
  background:
    radial-gradient(ellipse at 80% 10%, rgba(200, 162, 94, 0.08), transparent 55%),
    linear-gradient(135deg, var(--navy-950), var(--navy-800));
  color: #fff;
  padding: 84px 0 74px;
  overflow: hidden;
}
.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: linear-gradient(to bottom, #000 30%, transparent 100%);
  -webkit-mask-image: linear-gradient(to bottom, #000 30%, transparent 100%);
}
.page-hero-inner { position: relative; }
.breadcrumb {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.55);
  letter-spacing: 1.5px;
  margin-bottom: 22px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.breadcrumb a:hover { color: var(--gold); }
.breadcrumb .sep { color: var(--gold); }
.page-hero h1 {
  font-size: clamp(30px, 4vw, 46px);
  letter-spacing: 3px;
  font-weight: 700;
  margin-bottom: 14px;
}
.page-hero .page-hero-desc { color: rgba(255, 255, 255, 0.62); max-width: 620px; font-size: 15px; }
.page-hero .tag-line {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 26px;
  font-family: var(--serif);
  font-style: italic;
  font-size: 13px;
  letter-spacing: 3px;
  color: var(--gold);
  text-transform: uppercase;
}
.page-hero .tag-line::after {
  content: "";
  width: 60px;
  height: 1px;
  background: var(--gold);
}

/* ==========================================================================
   关于我们页
   ========================================================================== */
.about-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}
.about-intro-text .section-title { text-align: left; margin-bottom: 22px; font-size: clamp(23px, 2.4vw, 30px); }
.about-intro-text p { color: var(--gray); margin-bottom: 16px; font-size: 14.8px; text-align: justify; }
.about-intro-text .keywords {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 26px;
}
.about-intro-text .keywords span {
  font-size: 12.5px;
  letter-spacing: 1.5px;
  color: var(--navy-700);
  border: 1px solid var(--line);
  padding: 7px 16px;
  background: var(--white);
  transition: all 0.3s;
}
.about-intro-text .keywords span:hover { border-color: var(--gold); color: var(--gold); }
.about-visual {
  position: relative;
  padding: 30px;
}
.about-visual .frame {
  border: 1px solid var(--line);
  padding: 30px;
  background: var(--white);
  box-shadow: var(--shadow-lg);
}
.about-visual .frame svg { width: 100%; height: auto; color: var(--navy-800); }
.about-visual .corner {
  position: absolute;
  width: 52px;
  height: 52px;
  border: 2px solid var(--gold);
}
.about-visual .corner.tl { top: 0; left: 0; border-right: none; border-bottom: none; }
.about-visual .corner.br { bottom: 0; right: 0; border-left: none; border-top: none; }
.about-visual .float-tag {
  position: absolute;
  left: -26px;
  bottom: 52px;
  background: var(--navy-900);
  color: var(--gold-soft);
  padding: 16px 22px;
  box-shadow: var(--shadow-lg);
  font-size: 12.5px;
  letter-spacing: 1.5px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.about-visual .float-tag .icon { width: 26px; height: 26px; color: var(--gold); }

/* 里程碑时间线 */
.timeline { position: relative; max-width: 900px; margin: 0 auto; }
.timeline::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 1px;
  background: repeating-linear-gradient(var(--gold) 0 6px, transparent 6px 12px);
  opacity: 0.5;
}
.timeline-item {
  position: relative;
  width: 50%;
  padding: 0 48px 56px 0;
}
.timeline-item:nth-child(even) { margin-left: 50%; padding: 0 0 56px 48px; }
.timeline-item:last-child { padding-bottom: 0; }
.timeline-year {
  font-family: var(--serif);
  font-style: italic;
  font-size: 30px;
  font-weight: 700;
  color: var(--gold);
  margin-bottom: 8px;
  line-height: 1;
}
.timeline-item h3 { font-size: 17px; font-weight: 600; color: var(--navy-900); margin-bottom: 8px; letter-spacing: 1px; }
.timeline-item p { font-size: 13.8px; color: var(--gray); }
.timeline-dot {
  position: absolute;
  top: 8px;
  right: -6px;
  width: 12px;
  height: 12px;
  background: var(--white);
  border: 2px solid var(--gold);
  border-radius: 50%;
  z-index: 1;
}
.timeline-item:nth-child(even) .timeline-dot { right: auto; left: -6px; }

/* 企业文化 */
.values-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.value-card {
  background: var(--white);
  border: 1px solid var(--line);
  padding: 46px 36px;
  text-align: center;
  transition: all 0.35s;
  position: relative;
  overflow: hidden;
}
.value-card::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--gold), transparent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s;
}
.value-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.value-card:hover::after { transform: scaleX(1); }
.value-card .icon { width: 46px; height: 46px; margin: 0 auto 22px; color: var(--gold); }
.value-card h3 { font-size: 19px; font-weight: 600; color: var(--navy-900); letter-spacing: 2px; margin-bottom: 8px; }
.value-card .en {
  font-family: var(--serif);
  font-style: italic;
  font-size: 11.5px;
  letter-spacing: 2.5px;
  color: var(--gold);
  text-transform: uppercase;
  margin-bottom: 16px;
  display: block;
}
.value-card p { font-size: 13.8px; color: var(--gray); }

/* 资质荣誉 */
.cert-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.cert-card {
  background: var(--white);
  border: 1px solid var(--line);
  padding: 40px 26px;
  text-align: center;
  transition: all 0.3s;
}
.cert-card:hover { border-color: var(--gold); box-shadow: var(--shadow-md); }
.cert-card .icon { width: 42px; height: 42px; margin: 0 auto 18px; color: var(--navy-700); }
.cert-card h3 { font-size: 15.5px; font-weight: 600; color: var(--navy-900); margin-bottom: 8px; }
.cert-card p { font-size: 12.8px; color: var(--gray-light); }

/* 证照实图展示 */
.cert-photo-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 26px;
  align-items: start;
  max-width: 880px;
  margin: 0 auto;
}
.cert-photo {
  display: block;
  background: var(--white);
  border: 1px solid var(--line);
  padding: 14px 14px 18px;
  transition: all 0.3s;
}
.cert-photo:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); border-color: rgba(200, 162, 94, 0.55); }
.cert-photo img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: contain;
  background: var(--bg);
  border: 1px solid var(--line);
}
.cert-photo h3 {
  margin-top: 16px;
  font-size: 15.5px;
  font-weight: 600;
  color: var(--navy-900);
  letter-spacing: 1px;
}
.cert-photo p { margin-top: 5px; font-size: 12.3px; color: var(--gray-light); }

/* ==========================================================================
   产品服务页
   ========================================================================== */
.products-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
.product-card {
  background: var(--white);
  border: 1px solid var(--line);
  display: flex;
  gap: 34px;
  padding: 44px 40px;
  transition: all 0.35s;
  position: relative;
  overflow: hidden;
}
.product-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(var(--gold), var(--gold-soft));
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 0.35s;
}
.product-card:hover { box-shadow: var(--shadow-md); border-color: transparent; transform: translateY(-4px); }
.product-card:hover::before { transform: scaleY(1); }
.product-figure {
  flex-shrink: 0;
  width: 120px;
  height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px dashed rgba(200, 162, 94, 0.5);
  color: var(--navy-700);
  background: var(--bg);
}
.product-figure svg { width: 84px; height: 84px; }
.product-card h3 {
  font-size: 19px;
  font-weight: 600;
  color: var(--navy-900);
  letter-spacing: 1.5px;
  margin-bottom: 10px;
  display: flex;
  align-items: baseline;
  gap: 12px;
}
.product-card h3 .p-index {
  font-family: var(--serif);
  font-style: italic;
  font-size: 13px;
  color: var(--gold);
  font-weight: 400;
}
.product-card p { font-size: 13.8px; color: var(--gray); margin-bottom: 16px; }
.spec-chips { display: flex; flex-wrap: wrap; gap: 8px; }
.spec-chips span {
  font-size: 11.5px;
  color: var(--navy-700);
  background: var(--bg);
  border: 1px solid var(--line);
  padding: 4px 12px;
  letter-spacing: 0.5px;
}

/* 材料表 */
.materials-table { width: 100%; border-collapse: collapse; background: var(--white); }
.materials-table th, .materials-table td {
  text-align: left;
  padding: 16px 22px;
  font-size: 14px;
  border-bottom: 1px solid var(--line);
}
.materials-table thead th {
  background: var(--navy-900);
  color: var(--gold-soft);
  font-size: 13px;
  letter-spacing: 2px;
  font-weight: 500;
  border-bottom: none;
}
.materials-table td:first-child { font-weight: 600; color: var(--navy-900); white-space: nowrap; }
.materials-table tbody tr { transition: background 0.25s; }
.materials-table tbody tr:hover { background: #fbf7ef; }
.materials-table .m-class { color: var(--gold); font-weight: 600; }
.materials-note {
  margin-top: 16px;
  font-size: 12.8px;
  color: var(--gray-light);
  display: flex;
  gap: 8px;
  align-items: center;
}
.materials-note .icon { width: 15px; height: 15px; color: var(--gold); flex-shrink: 0; }

/* 检测能力 */
.inspection-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.inspect-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 38px 32px;
  transition: all 0.3s;
}
.inspect-card:hover { border-color: rgba(200, 162, 94, 0.5); background: rgba(200, 162, 94, 0.04); }
.inspect-card .icon { width: 40px; height: 40px; color: var(--gold); margin-bottom: 20px; }
.inspect-card h3 { font-size: 17px; font-weight: 600; color: #fff; margin-bottom: 10px; letter-spacing: 1px; }
.inspect-card p { font-size: 13.5px; color: rgba(255, 255, 255, 0.58); }

/* ==========================================================================
   联系我们页
   ========================================================================== */
.contact-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 60px;
  align-items: start;
}
.contact-info-card {
  background:
    radial-gradient(ellipse at 20% 0%, rgba(200, 162, 94, 0.1), transparent 50%),
    linear-gradient(150deg, var(--navy-950), var(--navy-800));
  color: #fff;
  padding: 52px 46px;
}
.contact-info-card h2 {
  font-size: 24px;
  letter-spacing: 2.5px;
  margin-bottom: 10px;
}
.contact-info-card .sub {
  font-family: var(--serif);
  font-style: italic;
  font-size: 12.5px;
  letter-spacing: 2.5px;
  color: var(--gold);
  text-transform: uppercase;
  margin-bottom: 38px;
}
.contact-item {
  display: flex;
  gap: 18px;
  padding: 22px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}
.contact-item:last-of-type { border-bottom: none; }
.contact-item .icon-box {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  border: 1px solid rgba(200, 162, 94, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--gold);
}
.contact-item .icon-box .icon { width: 20px; height: 20px; }
.contact-item h3 { font-size: 13px; letter-spacing: 2px; color: var(--gold-soft); margin-bottom: 4px; font-weight: 500; }
.contact-item p { font-size: 14.8px; color: #fff; }
.contact-item p small { display: block; font-size: 12.5px; color: rgba(255, 255, 255, 0.5); margin-top: 2px; }

.contact-form-wrap {
  background: var(--white);
  border: 1px solid var(--line);
  padding: 52px 50px;
}
.contact-form-wrap h2 { font-size: 24px; letter-spacing: 2.5px; color: var(--navy-900); margin-bottom: 8px; }
.contact-form-wrap .form-sub { font-size: 13.8px; color: var(--gray); margin-bottom: 36px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.form-group { margin-bottom: 22px; }
.form-group label {
  display: block;
  font-size: 13px;
  color: var(--navy-800);
  font-weight: 600;
  letter-spacing: 1px;
  margin-bottom: 8px;
}
.form-group label .req { color: var(--gold); margin-left: 3px; }
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  border: 1px solid var(--line);
  background: var(--bg);
  padding: 13px 16px;
  font-size: 14px;
  font-family: inherit;
  color: var(--ink);
  outline: none;
  transition: all 0.25s;
  border-radius: 2px;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--gold);
  background: var(--white);
  box-shadow: 0 0 0 3px rgba(200, 162, 94, 0.14);
}
.form-group textarea { resize: vertical; min-height: 120px; }
.form-submit {
  width: 100%;
  background: var(--navy-800);
  color: #fff;
  border: none;
  padding: 17px;
  font-size: 15px;
  letter-spacing: 3px;
  cursor: pointer;
  transition: all 0.3s;
  margin-top: 6px;
}
.form-submit:hover { background: var(--gold); color: var(--navy-900); }
.form-ok {
  display: none;
  margin-top: 18px;
  padding: 15px 18px;
  background: #f2f8ef;
  border: 1px solid #cfe3c8;
  color: #3d6b2f;
  font-size: 13.8px;
  align-items: center;
  gap: 10px;
}
.form-ok.show { display: flex; }
.form-ok .icon { width: 18px; height: 18px; flex-shrink: 0; }

/* 地图示意 */
.map-card {
  position: relative;
  background: var(--navy-900);
  overflow: hidden;
  min-height: 320px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.map-card svg.map-bg { position: absolute; inset: 0; width: 100%; height: 100%; opacity: 0.35; }
.map-pin-info {
  position: relative;
  text-align: center;
  color: #fff;
  padding: 30px;
}
.map-pin-info .pin {
  width: 44px;
  height: 44px;
  margin: 0 auto 14px;
  color: var(--gold);
  animation: pinbounce 2.4s ease-in-out infinite;
}
@keyframes pinbounce { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-8px); } }
.map-pin-info h3 { font-size: 17px; letter-spacing: 1.5px; margin-bottom: 6px; }
.map-pin-info p { font-size: 13px; color: rgba(255, 255, 255, 0.6); }

/* ==========================================================================
   页脚
   ========================================================================== */
.footer {
  background: var(--navy-950);
  color: rgba(255, 255, 255, 0.62);
  font-size: 13.5px;
}
.footer-main {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr 1fr 1.1fr;
  gap: 50px;
  padding: 74px 0 60px;
}
.footer h4 {
  color: #fff;
  font-size: 15px;
  letter-spacing: 2px;
  font-weight: 600;
  margin-bottom: 24px;
  position: relative;
  padding-bottom: 12px;
}
.footer h4::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 28px;
  height: 2px;
  background: var(--gold);
}
.footer-brand .brand { margin-bottom: 20px; }
.footer-brand .brand-text .brand-cn { color: #fff; }
.footer-brand p { line-height: 1.9; font-size: 13.2px; }
.footer-links li { margin-bottom: 12px; }
.footer-links a { transition: all 0.25s; display: inline-flex; align-items: center; gap: 8px; }
.footer-links a::before { content: "—"; color: var(--gold); font-size: 10px; }
.footer-links a:hover { color: var(--gold-soft); padding-left: 4px; }
.footer-contact li {
  display: flex;
  gap: 12px;
  margin-bottom: 15px;
  line-height: 1.65;
}
.footer-contact .icon { width: 16px; height: 16px; color: var(--gold); flex-shrink: 0; margin-top: 4px; }
.footer-hours { font-family: var(--serif); font-style: italic; font-size: 12px; letter-spacing: 2px; color: var(--gold); margin-bottom: 6px; }
.footer-bottom {
  border-top: 1px solid var(--line-dark);
  padding: 24px 0;
}
.footer-bottom-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  font-size: 12.5px;
  color: rgba(255, 255, 255, 0.42);
}
.footer-bottom-inner .beian { font-style: normal; }

/* 回到顶部 */
.backtop {
  position: fixed;
  right: 30px;
  bottom: 34px;
  width: 46px;
  height: 46px;
  background: var(--navy-800);
  border: 1px solid rgba(200, 162, 94, 0.5);
  color: var(--gold);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all 0.3s;
  z-index: 150;
}
.backtop.show { opacity: 1; visibility: visible; transform: translateY(0); }
.backtop:hover { background: var(--gold); color: var(--navy-900); }
.backtop .icon { width: 18px; height: 18px; }

/* ==========================================================================
   滚动动画
   ========================================================================== */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal-delay-1 { transition-delay: 0.12s; }
.reveal-delay-2 { transition-delay: 0.24s; }
.reveal-delay-3 { transition-delay: 0.36s; }
.reveal-delay-4 { transition-delay: 0.48s; }

/* ==========================================================================
   响应式
   ========================================================================== */
@media (max-width: 1024px) {
  .services-grid, .values-grid, .inspection-grid, .quality-grid { grid-template-columns: repeat(2, 1fr); }
  .industries { grid-template-columns: repeat(3, 1fr); }
  .cert-grid { grid-template-columns: repeat(2, 1fr); }
  .process { grid-template-columns: repeat(3, 1fr); row-gap: 44px; }
  .process::before { display: none; }
  .cap-grid { grid-template-columns: 1fr; gap: 50px; }
  .hero-inner { grid-template-columns: 1fr; padding: 80px 0 90px; }
  .hero-visual { display: none; }
  .contact-grid { grid-template-columns: 1fr; }
  .about-intro { grid-template-columns: 1fr; gap: 60px; }
}

@media (max-width: 768px) {
  .topbar { display: none; }
  .nav { height: 66px; }
  .nav-toggle { display: flex; }
  .nav-links {
    position: fixed;
    top: 66px;
    left: 0;
    right: 0;
    background: var(--navy-950);
    flex-direction: column;
    gap: 0;
    padding: 10px 28px 24px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
  }
  .nav-links.open { max-height: 420px; }
  .nav-links a { color: #fff; padding: 15px 0; border-bottom: 1px solid var(--line-dark); width: 100%; }
  .nav-links a::after { display: none; }
  .nav-links a.active { color: var(--gold); }
  .nav-cta { display: none; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat { padding: 36px 14px; }
  .stat + .stat::before { display: none; }
  .stat:nth-child(3)::before, .stat:nth-child(4)::before { display: block; }
  .stat:nth-child(3)::before { top: 0; left: 50%; height: 1px; width: 56%; transform: translateX(-50%); }
  .stat:nth-child(4)::before { display: none; }
  .services-grid, .products-grid, .values-grid, .industries, .inspection-grid, .quality-grid, .cert-grid, .cert-photo-grid { grid-template-columns: 1fr; }
  .process { grid-template-columns: repeat(2, 1fr); }
  .product-card { flex-direction: column; gap: 24px; }
  .timeline::before { left: 8px; }
  .timeline-item, .timeline-item:nth-child(even) { width: 100%; margin-left: 0; padding: 0 0 46px 40px; }
  .timeline-dot { left: 2px; right: auto; }
  .form-row { grid-template-columns: 1fr; }
  .contact-form-wrap, .contact-info-card { padding: 36px 26px; }
  .footer-main { grid-template-columns: 1fr; gap: 40px; padding: 56px 0 44px; }
  .section { padding: 70px 0; }
  .about-visual .float-tag { left: 0; bottom: 20px; }
}

/* ==========================================================================
   语言切换器 / Language Switcher
   ========================================================================== */
.nav-right {
  display: flex;
  align-items: center;
  gap: 12px;
}
.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  height: 40px;
  padding: 0 15px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--navy-800);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 1.6px;
  text-transform: uppercase;
  transition: all 0.3s;
  white-space: nowrap;
}
.lang-switch:hover {
  border-color: var(--gold);
  color: var(--gold);
}
.lang-switch .icon { width: 14px; height: 14px; }
.lang-switch .lang-current { color: var(--gold); }
.lang-switch .lang-sep { color: var(--line); font-weight: 400; }
.lang-switch .lang-off { opacity: 0.45; }

@media (max-width: 768px) {
  .nav-right { gap: 8px; }
  .lang-switch {
    height: 34px;
    padding: 0 10px;
    font-size: 11.5px;
    letter-spacing: 1px;
  }
  .lang-switch .icon { display: none; }
}