/* ============================================================
   GOLDEN PHOENIX — 金凤凰传动带 官网样式 v2
   改版：视觉参照 gates.com（全大写口号标题 / 直角扁平组件 /
   单色点缀 / 深色分区节奏），品牌色保留金凤凰蓝白基调
   Primary: #0B4EA2  Accent: #F5B301 (gold, 少量点缀)
   ============================================================ */

:root {
  --navy-950: #041c3d;
  --navy-900: #06244f;
  --navy-800: #0a2e5c;
  --navy-700: #0b3d7d;
  --blue-700: #0b4ea2;
  --blue-600: #125fc0;
  --blue-500: #1e6fd9;
  --blue-200: #bcd8f5;
  --blue-100: #e3effc;
  --blue-50:  #f4f9fe;
  --gold:     #f5b301;
  --ink:      #17263a;
  --ink-soft: #3f5168;
  --gray:     #5f7086;
  --line:     #dfe9f4;
  --white:    #ffffff;

  --font: "Segoe UI", "PingFang SC", "Microsoft YaHei", "Noto Sans SC",
          "Helvetica Neue", Arial, sans-serif;
  --container: 1240px;
  --header-h: 74px;
}

/* ---------- Reset / base ---------- */
[hidden] { display: none !important; }
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
}
img, svg { max-width: 100%; display: block; }
a { color: var(--blue-700); text-decoration: none; transition: color .2s; }
a:hover { color: var(--blue-600); }
h1, h2, h3, h4 { margin: 0 0 .5em; line-height: 1.25; font-weight: 800; color: var(--ink); }
p { margin: 0 0 1em; }
ul { margin: 0; padding: 0; list-style: none; }
.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }
section { padding: 76px 0; }

/* 占位内容标注：待用户补充的品牌资料 */
.ph { border-bottom: 1px dashed #a9c4e4; cursor: help; }

/* ---------- 顶部导航（盖茨式：紧凑 + 大写菜单） ---------- */
.site-header {
  position: sticky; top: 0; z-index: 200; /* 最高层级 */
  background: rgba(255,255,255,.97);
  backdrop-filter: blur(8px);
  border-bottom: 2px solid var(--navy-900);
}
.header-inner {
  max-width: var(--container); margin: 0 auto; padding: 0 24px;
  height: var(--header-h);
  display: flex; align-items: center; gap: 26px;
}
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; min-width: 0; color: inherit; }
.brand:hover { color: inherit; }
.brand img { width: 46px; height: 46px; flex-shrink: 0; }
.brand-text { display: flex; align-items: baseline; gap: 12px; min-width: 0; line-height: 1; white-space: nowrap; }
.brand-name { display: inline-block; font-weight: 800; font-size: 23px; color: #06244f; line-height: 1; letter-spacing: -0.03em; }
.brand-sub { display: inline-block; font-size: 14px; color: #6b7789; font-weight: 500; line-height: 1; white-space: nowrap; letter-spacing: 0; text-transform: none; }
html[lang="en"] .brand-name { font-size: 20px; letter-spacing: 0; }
html[lang="en"] .brand-sub { font-size: 12px; font-weight: 600; }
@media (min-width: 861px) {
  html[lang="en"] .main-nav a { padding-left: 10px; padding-right: 10px; }
}

.main-nav { margin-left: auto; display: flex; align-items: center; gap: 2px; }
.main-nav a {
  padding: 8px 15px;
  font-size: 13px; font-weight: 700; letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--ink-soft);
}
.main-nav a:hover { color: var(--blue-700); background: var(--blue-50); }
.main-nav a.active { color: var(--white); background: var(--navy-900); }

/* 语言切换 */
.lang-switch {
  display: inline-flex; align-items: center;
  border: 1px solid var(--navy-900); border-radius: 0; overflow: hidden;
  background: var(--white); flex-shrink: 0;
}
.lang-switch button {
  border: 0; background: transparent; cursor: pointer;
  font-family: inherit; font-size: 12px; font-weight: 800; letter-spacing: .06em;
  padding: 6px 12px; color: var(--gray); transition: all .2s;
}
.lang-switch button.active { background: var(--navy-900); color: #fff; }

.header-cta { flex-shrink: 0; }

/* 汉堡按钮（移动端） */
.nav-toggle {
  display: none; border: 0; background: none; cursor: pointer;
  width: 40px; height: 40px; border-radius: 0; flex-shrink: 0;
  align-items: center; justify-content: center; gap: 5px; flex-direction: column;
}
.nav-toggle span { display: block; width: 20px; height: 2px; background: var(--navy-900); border-radius: 0; transition: .25s; }
.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); }

/* ---------- 按钮（盖茨式：直角 + 全大写 + hover 变深） ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 34px; border-radius: 0;
  font-family: inherit; font-size: 13px; font-weight: 800;
  letter-spacing: .12em; text-transform: uppercase;
  border: 0; cursor: pointer; text-decoration: none;
  transition: background .2s, color .2s, transform .15s; white-space: nowrap;
}
.btn-primary { background: var(--blue-700); color: #fff; }
.btn-primary:hover { background: var(--navy-900); color: #fff; transform: translateY(-1px); }
.btn-gold { background: var(--gold); color: #3a2a00; }
.btn-gold:hover { background: var(--navy-900); color: #fff; transform: translateY(-1px); }
.btn-outline { background: transparent; color: var(--blue-700); border: 2px solid var(--blue-700); }
.btn-outline:hover { background: var(--navy-900); border-color: var(--navy-900); color: #fff; }
.btn-outline-light { background: transparent; color: #fff; border: 2px solid rgba(255,255,255,.7); }
.btn-outline-light:hover { background: #fff; color: var(--navy-900); border-color: #fff; }
.btn-lg { padding: 16px 44px; font-size: 14px; }

/* ---------- Hero（基地实拍 + 品牌标识） ---------- */
.hero-factory {
  position: relative;
  height: 92vh;
  min-height: 650px;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--navy-900);
}
.hero-factory-bg {
  position: absolute;
  top: 0; left: 0; width: 100%; height: 100%;
  z-index: 1;
}
.hero-factory-bg img {
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: center center;
  filter: saturate(1.1) contrast(1.05);
}
.hero-overlay {
  position: absolute;
  top: 0; left: 0; width: 100%; height: 100%;
  background: linear-gradient(90deg, rgba(4,28,61,0.92) 0%, rgba(4,28,61,0.7) 40%, rgba(4,28,61,0) 100%);
  z-index: 2;
}
.hero-content {
  position: relative;
  z-index: 10;
  width: 100%;
}
.hero-brand-box {
  max-width: 800px;
  padding-left: 20px;
}
.hero-logo-large {
  width: 110px;
  margin-bottom: 32px;
  filter: drop-shadow(0 4px 20px rgba(0,0,0,0.3));
}
.hero-main-title {
  margin: 0;
  color: #fff;
  line-height: 1;
}
.hero-main-title .zh {
  display: block;
  font-size: 92px;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
  text-shadow: 0 10px 30px rgba(0,0,0,0.3);
}
.hero-main-title .en {
  display: block;
  font-size: 32px;
  font-weight: 700;
  letter-spacing: 0.4em;
  opacity: 0.95;
  text-transform: uppercase;
}
.hero-divider {
  width: 120px;
  height: 5px;
  background: var(--gold);
  margin: 40px 0;
  box-shadow: 0 2px 10px rgba(245,179,1,0.3);
}
.hero-tagline {
  font-size: 18px;
  font-weight: 600;
  color: rgba(255,255,255,0.85);
  letter-spacing: 0.1em;
  margin-bottom: 48px;
  max-width: 500px;
}
.hero-actions {
  display: flex;
  gap: 20px;
}

@media (max-width: 768px) {
  .hero-factory { height: 80vh; text-align: center; }
  .hero-overlay { background: linear-gradient(0deg, rgba(4,28,61,0.95) 0%, rgba(4,28,61,0.6) 100%); }
  .hero-brand-box { padding-left: 0; margin: 0 auto; }
  .hero-main-title .zh { font-size: 56px; }
  .hero-main-title .en { font-size: 18px; letter-spacing: 0.2em; }
  .hero-divider { margin: 24px auto; }
  .hero-actions { justify-content: center; flex-direction: column; gap: 12px; }
}
.hero-factory-bg {
  position: absolute;
  top: 0; left: 0; width: 100%; height: 100%;
  z-index: 1;
}
.hero-factory-bg img {
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: center bottom;
}
.hero-overlay {
  position: absolute;
  top: 0; left: 0; width: 100%; height: 100%;
  background: linear-gradient(90deg, rgba(6,36,79,0.85) 0%, rgba(6,36,79,0.4) 50%, rgba(6,36,79,0.1) 100%);
  z-index: 2;
}
.hero-content {
  position: relative;
  z-index: 10;
}
.hero-brand-box {
  max-width: 600px;
  padding-left: 20px;
}
.hero-logo-large {
  width: 90px;
  margin-bottom: 24px;
}
.hero-main-title {
  margin: 0;
  color: #fff;
  line-height: 1.1;
}
.hero-main-title .zh {
  display: block;
  font-size: 82px;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 10px;
}
.hero-main-title .en {
  display: block;
  font-size: 28px;
  font-weight: 700;
  letter-spacing: 0.35em;
  opacity: 0.9;
}
.hero-divider {
  width: 100px;
  height: 4px;
  background: var(--gold);
  margin: 32px 0;
}
.hero-tagline {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: rgba(255,255,255,0.8);
  margin-bottom: 48px;
  text-transform: uppercase;
}
.hero-actions {
  display: flex;
  gap: 20px;
}

@media (max-width: 768px) {
  .hero-factory { height: auto; padding: 100px 0 80px; }
  .hero-brand-box { text-align: center; margin: 0 auto; padding-left: 0; }
  .hero-main-title .zh { font-size: 56px; }
  .hero-main-title .en { font-size: 20px; letter-spacing: 0.2em; }
  .hero-divider { margin: 24px auto; }
  .hero-actions { flex-direction: column; align-items: stretch; }
}

/* ---------- Hero 统计条（盖茨市场条节奏：深色 + 大写标签） ---------- */
.hero-stats { border-top: 3px solid var(--gold); background: var(--navy-900); }
.stats-grid {
  max-width: var(--container); margin: 0 auto; padding: 30px 24px;
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px;
}
.stat { text-align: center; border-right: 1px solid rgba(255,255,255,.14); }
.stat:last-child { border-right: 0; }
.stat b { display: block; font-size: 36px; color: var(--gold); font-weight: 800; line-height: 1.1; letter-spacing: .5px; }
.stat span { display: block; font-size: 12px; color: #cfe0f5; letter-spacing: .14em; text-transform: uppercase; margin-top: 4px; }

/* ---------- 分区标题（盖茨式：小眉题大写 + 加粗主标题） ---------- */
.section-head { max-width: 760px; margin: 0 auto 52px; text-align: center; }
.eyebrow {
  display: inline-block; font-size: 12px; font-weight: 800; letter-spacing: .22em;
  color: var(--blue-600); text-transform: uppercase; margin-bottom: 12px;
  border-bottom: 2px solid var(--gold); padding-bottom: 4px;
}
.section-head h2 { font-size: 32px; letter-spacing: .02em; margin-bottom: 14px; }
.section-head p { color: var(--gray); font-size: 16px; }

/* ---------- 子页面页头 ---------- */
.page-hero { background: var(--navy-900); color: #fff; padding: 68px 0 60px; text-align: center; border-bottom: 3px solid var(--gold); }
.page-hero h1 { color: #fff; font-size: 36px; letter-spacing: .06em; text-transform: uppercase; margin-bottom: 10px; }
.page-hero p { color: #c9dcf6; margin: 0; font-size: 15.5px; }

/* ---------- 卡片（盖茨式：扁平直角、无阴影） ---------- */
.grid { display: grid; gap: 22px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: var(--white); border: 1px solid var(--line); border-radius: 0;
  padding: 28px; transition: border-color .2s, transform .2s;
}
.card:hover { border-color: var(--blue-500); transform: translateY(-3px); }
.card-icon {
  width: 62px; height: 62px; border-radius: 0;
  background: var(--blue-50); border: 1px solid var(--blue-100);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 18px; padding: 10px;
}
.card-icon svg { width: 100%; height: 100%; }
.card h3 { font-size: 18px; letter-spacing: .02em; margin-bottom: 6px; }
.card p { color: var(--gray); font-size: 14.5px; margin-bottom: 0; }
.prod-en { font-size: 12px; color: var(--gray); font-weight: 700; letter-spacing: .1em; text-transform: uppercase; margin: -2px 0 10px; }
.card .card-link, .card-link {
  display: inline-block; margin-top: 16px;
  font-size: 13px; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; color: var(--blue-700);
}
.card .card-link::after, .card-link::after { content: " →"; transition: margin .2s; }
.card .card-link:hover::after, .card-link:hover::after { margin-left: 5px; }

/* ---------- 首页产品卡（大图 + 大写标题 + 箭头链接，盖茨产品卡节奏） ---------- */
.home-prod-card { padding: 0; overflow: hidden; display: flex; flex-direction: column; border: 1px solid var(--line); }
.home-prod-card:hover { border-color: var(--navy-900); }
.home-prod-card .hp-img { 
  width: 100%; 
  aspect-ratio: 4/3; 
  object-fit: contain;     /* 关键：不裁剪，完整显示 */
  background: #fff; 
  border-bottom: 1px solid var(--line); 
}
.home-prod-card .hp-body { padding: 22px 24px 26px; display: flex; flex-direction: column; flex: 1; }
.home-prod-card .hp-body h3 { font-size: 17px; letter-spacing: .04em; margin-bottom: 2px; }
.home-prod-card .hp-body p { font-size: 13.5px; color: var(--gray); margin: 8px 0 0; flex: 1; }
.home-prod-card .hp-body .card-link { margin-top: 14px; }

/* ---------- 应用领域 ---------- */
.app-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.app-item { text-align: center; padding: 34px 20px; border-radius: 0; background: var(--blue-50); border: 1px solid var(--blue-100); transition: all .2s; }
.app-item:hover { background: var(--white); border-color: var(--blue-500); }
.app-item .ico { width: 50px; height: 50px; margin: 0 auto 14px; color: var(--blue-700); }
.app-item h3 { font-size: 16px; letter-spacing: .04em; margin-bottom: 6px; }
.app-item p { color: var(--gray); font-size: 14px; margin: 0; }
/* 场景图卡片 */
.app-item.app-scene {
  position: relative; min-height: 235px; padding: 28px 22px 20px;
  display: flex; flex-direction: column; justify-content: flex-end; align-items: flex-start;
  text-align: left; background-color: var(--navy-900); background-size: cover; background-position: center; border: 0;
}
.app-item.app-scene::before { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(4,28,61,.1) 0%, rgba(4,28,61,.88) 100%); }
.app-item.app-scene > * { position: relative; z-index: 1; }
.app-item.app-scene h3 { color: #fff; }
.app-item.app-scene p { color: #d5e4f8; }

/* ---------- 产品实拍图库 ---------- */
.prod-gallery { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 18px; }
.g-item { position: relative; border: 1px solid var(--line); border-radius: 0; overflow: hidden; background: #fff; transition: all .2s; }
.g-item:hover { box-shadow: none; border-color: var(--blue-500); }
.g-item img { 
  width: 100%; 
  aspect-ratio: 4/3; 
  object-fit: contain;     /* 关键：不裁剪，完整显示 */
  background: #fff; 
}
.g-item figcaption { padding: 10px 12px; font-size: 13px; color: var(--ink-soft); font-weight: 700; border-top: 1px solid var(--line); background: #fbfdff; line-height: 1.4; letter-spacing: .02em; }
.g-item figcaption small { display: block; color: var(--gray); font-weight: 500; }

/* ---------- 证书墙 ---------- */
.cert-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.cert-item { background: #fff; border: 1px solid var(--line); border-radius: 0; overflow: hidden; transition: all .2s; text-align: center; }
.cert-item:hover { border-color: var(--blue-500); }
.cert-item img { width: 100%; aspect-ratio: 3/2; object-fit: contain; background: #fff; padding: 10px; }
.cert-item figcaption { padding: 10px 14px 14px; font-size: 14px; font-weight: 700; color: var(--ink-soft); border-top: 1px solid #f0f5fb; letter-spacing: .02em; }
.cert-item figcaption small { display: block; color: var(--gray); font-weight: 500; font-size: 12.5px; margin-top: 3px; }

/* ---------- 公司实拍墙 ---------- */
.photo-wall { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.photo-wall .p-item { position: relative; border-radius: 0; overflow: hidden; border: 1px solid var(--line); }
.photo-wall .p-item img { width: 100%; height: 200px; object-fit: cover; transition: transform .4s; }
.photo-wall .p-item:hover img { transform: scale(1.04); }
.photo-wall .p-item figcaption { position: absolute; left: 0; right: 0; bottom: 0; padding: 22px 12px 10px; background: linear-gradient(transparent, rgba(4,28,61,.85)); color: #fff; font-size: 13px; font-weight: 700; text-align: left; letter-spacing: .04em; }

/* ---------- CTA 横幅（盖茨式：深色实底 + 大写标题） ---------- */
.cta-band { background: var(--navy-900); color: #fff; text-align: center; border-top: 3px solid var(--gold); }
.cta-band h2 { color: #fff; font-size: 30px; letter-spacing: .04em; text-transform: uppercase; margin-bottom: 10px; }
.cta-band p { color: #b9d0ec; margin-bottom: 28px; }

/* ---------- 页脚 ---------- */
.site-footer { background: var(--navy-950); color: #a8bfdd; font-size: 14px; }
.footer-grid { max-width: var(--container); margin: 0 auto; padding: 58px 24px 40px; display: grid; grid-template-columns: 2fr 1fr 1fr 1.4fr; gap: 40px; }
.footer-grid h4 { color: #fff; font-size: 13px; margin-bottom: 16px; letter-spacing: .18em; text-transform: uppercase; border-bottom: 1px solid rgba(255,255,255,.15); padding-bottom: 8px; }
.footer-grid a { color: #a8bfdd; display: inline-block; padding: 3px 0; }
.footer-grid a:hover { color: var(--gold); }
.footer-brand img { width: 46px; height: 46px; margin-bottom: 12px; }
.footer-brand p { margin-bottom: 8px; max-width: 300px; }
.footer-contact li { display: flex; gap: 8px; padding: 4px 0; }
.footer-contact svg { flex-shrink: 0; margin-top: 5px; color: var(--gold); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.1); padding: 18px 24px; text-align: center; font-size: 13px; color: #6f89ac; }

/* ---------- 产品中心页 ---------- */
.prod-nav { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; margin-bottom: 46px; }
.prod-nav a { padding: 9px 22px; border-radius: 0; border: 1px solid var(--line); background: var(--white); font-size: 13px; font-weight: 800; letter-spacing: .06em; color: var(--ink-soft); text-transform: uppercase; }
.prod-nav a:hover, .prod-nav a.active { background: var(--navy-900); color: #fff; border-color: var(--navy-900); }

.prod-card { display: grid; grid-template-columns: 220px 1fr; gap: 28px; align-items: start; }
.prod-card .card-icon { width: 220px; height: 150px; padding: 20px; border-radius: 0; }
.prod-card .card-icon svg { width: 100%; height: 100%; }
.prod-specs { margin-top: 14px; border-top: 1px dashed var(--line); padding-top: 12px; }
.prod-specs li { display: flex; justify-content: space-between; gap: 16px; padding: 5px 0; font-size: 14px; color: var(--gray); border-bottom: 1px dotted #eef4fb; }
.prod-specs li b { color: var(--ink); font-weight: 600; white-space: nowrap; }
.prod-tags { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0 4px; }
.tag { font-size: 12px; font-weight: 800; letter-spacing: .05em; color: var(--blue-700); background: var(--blue-50); border: 1px solid var(--blue-100); padding: 3px 12px; border-radius: 0; }

/* ---------- 关于我们 ---------- */
.about-intro { display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items: start; }
.about-intro h2 { font-size: 28px; letter-spacing: .02em; }
.about-intro .lead { font-size: 17px; color: var(--ink-soft); }
.fact-list { margin-top: 18px; }
.fact-list li { display: flex; justify-content: space-between; padding: 12px 2px; border-bottom: 1px solid var(--line); font-size: 15px; }
.fact-list li b { color: var(--blue-700); }
.about-aside { background: var(--blue-50); border: 1px solid var(--blue-100); border-radius: 0; padding: 28px; }
.about-aside h3 { font-size: 17px; letter-spacing: .05em; text-transform: uppercase; }
.about-aside ul li { padding: 6px 0 6px 22px; position: relative; color: var(--ink-soft); font-size: 14.5px; }
.about-aside ul li::before { content: "✓"; position: absolute; left: 0; color: var(--blue-600); font-weight: 800; }

/* 生产流程 */
.process-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 14px; }
.process-step { position: relative; text-align: center; padding: 24px 10px; background: var(--white); border: 1px solid var(--line); border-radius: 0; }
.process-step:hover { border-color: var(--blue-500); }
.process-step .num { width: 30px; height: 30px; margin: 0 auto 10px; border-radius: 0; background: var(--navy-900); color: #fff; font-weight: 800; font-size: 14px; display: flex; align-items: center; justify-content: center; }
.process-step h4 { font-size: 14px; letter-spacing: .04em; margin-bottom: 4px; }
.process-step p { font-size: 12.5px; color: var(--gray); margin: 0; }

/* ---------- 联系页 ---------- */
.contact-grid { display: grid; grid-template-columns: .85fr 1.15fr; gap: 48px; align-items: start; }
.contact-info-card { background: var(--blue-50); border: 1px solid var(--blue-100); border-radius: 0; padding: 30px; }
.contact-info-card h3 { font-size: 17px; letter-spacing: .05em; text-transform: uppercase; margin-bottom: 18px; }
.contact-info-card ul li { display: flex; gap: 12px; padding: 9px 0; font-size: 15px; color: var(--ink-soft); border-bottom: 1px dashed #d5e6f8; }
.contact-info-card ul li:last-child { border-bottom: 0; }
.contact-info-card svg { flex-shrink: 0; margin-top: 4px; color: var(--blue-600); }
.contact-info-card .ph { border-bottom-color: #9db8d9; }

.form-card { background: var(--white); border: 1px solid var(--line); border-radius: 0; padding: 34px; }
.form-card h3 { font-size: 20px; letter-spacing: .03em; margin-bottom: 6px; }
.form-card .form-note { color: var(--gray); font-size: 13.5px; margin-bottom: 24px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-size: 13px; font-weight: 800; letter-spacing: .05em; color: var(--ink-soft); margin-bottom: 6px; text-transform: uppercase; }
.form-group label em { color: #d64545; font-style: normal; }
.form-group input, .form-group select, .form-group textarea {
  width: 100%; padding: 12px 14px; border: 1px solid var(--line); border-radius: 0;
  font-family: inherit; font-size: 15px; color: var(--ink); background: #fbfdff;
  transition: border-color .2s, box-shadow .2s;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { outline: none; border-color: var(--blue-500); box-shadow: 0 0 0 3px rgba(30,111,217,.12); }
.form-group textarea { resize: vertical; min-height: 120px; }
.form-success { display: none; margin-top: 16px; padding: 14px 18px; border-radius: 0; background: #eaf7ef; border: 1px solid #b7e3c8; color: #1e7a45; font-size: 14.5px; }
.form-success.show { display: block; }

.note-box { background: #fff8e6; border: 1px solid #f3dfae; border-radius: 0; padding: 14px 18px; font-size: 13.5px; color: #7a5b10; margin-top: 22px; }

/* ---------- 车型查多楔带 ---------- */
.lookup-card { max-width: 920px; margin: 0 auto; background: var(--white); border: 1px solid var(--line); border-radius: 0; padding: 34px; }
.lookup-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; align-items: end; }
.lookup-grid .form-group { margin-bottom: 0; }
.lookup-actions { display: flex; gap: 12px; margin-top: 20px; }
.lk-table-wrap { overflow-x: auto; margin-top: 8px; border: 1px solid var(--line); border-radius: 0; }
.lk-table { width: 100%; border-collapse: collapse; font-size: 14.5px; min-width: 560px; }
.lk-table thead th { background: var(--navy-900); color: #fff; text-align: left; padding: 11px 14px; font-weight: 800; white-space: nowrap; letter-spacing: .04em; text-transform: uppercase; font-size: 12.5px; }
.lk-table tbody td { padding: 10px 14px; border-bottom: 1px solid #eef4fb; color: var(--ink-soft); vertical-align: top; }
.lk-table tbody tr:nth-child(even) { background: #f7fafd; }
.lk-table tbody tr:hover { background: var(--blue-50); }
.lk-belt { display: inline-block; margin: 2px 4px 2px 0; }
.lk-empty { margin-top: 18px; padding: 26px 20px; text-align: center; border-radius: 0; background: var(--blue-50); border: 1px dashed var(--blue-200); color: var(--gray); font-size: 15px; }
.lk-nobelt { margin-top: 18px; padding: 14px 18px; border-radius: 0; background: #fff8e6; border: 1px solid #f3dfae; color: #7a5b10; font-size: 14.5px; }
.lk-info { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 10px; margin-top: 26px; padding-bottom: 8px; border-bottom: 1px solid var(--line); }
.lk-info h2 { font-size: 18px; letter-spacing: .04em; text-transform: uppercase; margin: 0; }
.lk-info .lk-count { font-size: 13.5px; color: var(--gray); }
.lk-note { margin-top: 14px; font-size: 13px; color: var(--gray); }

/* ---------- 入场动画 ---------- */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; } }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .app-grid { grid-template-columns: repeat(2, 1fr); }
  .process-grid { grid-template-columns: repeat(3, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .prod-gallery { grid-template-columns: repeat(2, 1fr); }
  .cert-grid { grid-template-columns: repeat(2, 1fr); }
  .photo-wall { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 860px) {
  .hero-banner-wide { display: none; }
  .hero-banner-mobile { display: block; }
  .header-inner { gap: 12px; }
  .brand { min-width: 0; }
  .brand span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .lang-switch, .nav-toggle { flex-shrink: 0; }
  .nav-toggle { display: flex; }
  .main-nav {
    position: fixed; top: var(--header-h); left: 0; right: 0;
    background: #fff; border-bottom: 2px solid var(--navy-900);
    flex-direction: column; align-items: stretch; gap: 0;
    padding: 10px 24px 18px; margin: 0;
    transform: translateY(-8px); opacity: 0; pointer-events: none;
    transition: .25s;
  }
  .main-nav.open { transform: none; opacity: 1; pointer-events: auto; }
  .main-nav a { padding: 13px 10px; font-size: 15px; border-radius: 0; }
  .header-cta { display: none; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .about-intro { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .prod-card { grid-template-columns: 1fr; }
  .section-head h2 { font-size: 26px; }
  .page-hero h1 { font-size: 28px; }
  .lookup-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 600px) {
  section { padding: 52px 0; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 18px; }
  .stat { border-right: 0; }
  .grid-4 { grid-template-columns: 1fr; }
  .app-grid { grid-template-columns: 1fr 1fr; }
  .process-grid { grid-template-columns: repeat(2, 1fr); }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 30px; }
  .stat b { font-size: 28px; }
  .brand-sub { display: none; }
  .brand-name { font-size: 16px; }
  .brand img { width: 38px; height: 38px; }
  .header-inner { padding: 0 14px; }
  .lang-switch button { padding: 5px 9px; font-size: 11px; }
  .cta-band h2 { font-size: 24px; }
  .prod-gallery, .cert-grid, .photo-wall { grid-template-columns: 1fr; }
  .lookup-grid { grid-template-columns: 1fr; }
  .lookup-card { padding: 24px 18px; }
}

/* ============================================================
   应用领域 — 精确对标三力士 (极致稳定版 v2)
   ============================================================ */

/* 白色盖层：绝对遮蔽，防止圆点漂浮到上方区域 */
.hs-white-cover {
  position: relative; 
  z-index: 150; 
  background: #fff;
}

.hs-section {
  position: relative;
  background: #fff;
  overflow: clip;
  padding: 0 0 50vh;    /* 关键：底部留出 50vh 的滚动空间，让最后一个圆点能移到 Logo 位置 */
  margin-top: -120px;   /* 极致上移：让整个标题区嵌入到上方区域 */
}

/* 1. 背景层 */
.hs-bg-wrap {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  pointer-events: none;
  z-index: 1;
}
.hs-bg-sticky-box {
  position: sticky; top: 0;
  width: 100%; height: 100vh;
  overflow: hidden;
}
.hs-bg-item {
  position: absolute; inset: 0;
  opacity: 0; transition: none;
  will-change: opacity;
}
.hs-bg-item img { width: 100%; height: 100%; object-fit: cover; }
.hs-bg-blank { background: #fff; opacity: 1; z-index: 1; }
.hs-overlay {
  position: absolute; inset: 0;
  background: rgba(0, 10, 30, 0.48);
  opacity: 0; z-index: 10;
}

/* 2. 中央轴线系统：一开始就在白色背景上存在 */
.hs-axis-wrap {
  position: absolute;
  top: 70%;
  bottom: 0;           /* 初始值，由 JS 动态设置 height 覆盖 */
  left: 50%;
  width: 0;
  z-index: 120;
  pointer-events: none;
}

.hs-axis-node {
  position: sticky;
  top: 50vh;           /* 锁定在屏幕正中心 */
  transform: translate(-50%, -50%);
  width: 60px; height: 60px;
  border-radius: 50%;
  background: #fff;
  border: 3px solid var(--gold);
  display: flex; align-items: center; justify-content: center;
  /* 极致遮罩：15px 纯白护城河 + 30px 柔和羽化，确保完全吞没圆点边缘 */
  box-shadow: 0 0 0 15px #fff, 0 0 30px rgba(255,255,255,1), 0 4px 15px rgba(0,0,0,0.1); 
  pointer-events: auto;
  z-index: 200;
  opacity: 1;
}

.hs-core-item {
  min-height: 100vh; 
  display: flex; 
  align-items: center;
  padding: 0 10%; 
  position: relative;
  /* 移除干扰对齐的 margin，改用精准的 padding */
}


.hs-axis-node {
  position: sticky;
  top: 50vh;           /* 锁定在屏幕正中心 */
  transform: translate(-50%, -50%);
  width: 60px; height: 60px;
  border-radius: 50%;
  background: #fff;
  border: 3px solid var(--gold);
  display: flex; align-items: center; justify-content: center;
  /* 增加白色模糊阴影遮罩，确保完美盖住圆点边缘 */
  box-shadow: 0 0 0 10px #fff, 0 0 25px rgba(255,255,255,1), 0 4px 15px rgba(0,0,0,0.1); 
  pointer-events: auto;
  z-index: 200;
  opacity: 1;
}

.hs-axis-line {
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 2px;
  background: rgba(212, 165, 46, 0.4);
  transform: translateX(-50%);
}
.hs-axis-node {
  position: sticky;
  top: 50vh;          /* 关键：Logo 锁定在屏幕正中间 */
  transform: translate(-50%, -50%);
  width: 60px; height: 60px;
  border-radius: 50%;
  background: #fff;   /* 纯白实底 */
  border: 3px solid var(--gold);
  display: flex; align-items: center; justify-content: center;
  /* 优化遮罩：增加一层大范围的白色模糊阴影 */
  box-shadow: 0 0 0 8px #fff, 0 0 20px rgba(255,255,255,1), 0 4px 15px rgba(0,0,0,0.1); 
  pointer-events: auto;
  z-index: 200;       /* 绝对最高层 */
  opacity: 1;
}

/* 调整首屏高度，确保 Logo 有「到达中间」的过程 */
.hs-core-first {
  min-height: 100vh;      /* 撑开首屏到 100% 视口高度 */
  display: flex; align-items: center; justify-content: center;
  text-align: center; 
  padding: 0 24px;
  background: transparent;
}

.hs-node-logo { 
  width: 42px;        /* 稍微放大 Logo */
  height: 42px; 
  object-fit: contain; 
}

/* 3. 滚动内容层 */
.hs-core {
  position: relative; z-index: 100;
  list-style: none; margin: 0; padding: 0;
}
.hs-core-first {
  min-height: auto;
  display: flex; align-items: center; justify-content: center;
  text-align: center; 
  padding: 0 24px 30px;     /* 极致压缩底部留白 */
  background: transparent;
}
.hs-first-inner {
  display: flex; flex-direction: column; align-items: center;
  margin-top: 0;
}
.hs-header-icon { width: 64px; height: 64px; margin-bottom: 8px; }
.hs-header-icon img { width: 100%; height: 100%; object-fit: contain; }

.hs-main-title {
  font-size: clamp(28px, 4vw, 48px);
  color: var(--ink); font-weight: 700; line-height: 1.2; margin-bottom: 12px;
}
.hs-main-sub {
  font-size: clamp(20px, 2.5vw, 32px);
  font-weight: 700; line-height: 1.1; color: var(--ink);
}
.hs-main-sub span:first-child { color: var(--gold); }

/* 4. 场景卡片 */
.hs-core-item {
  min-height: 100vh; display: flex; align-items: center;
  padding: 0 10%; position: relative;
}
.hs-core-item[data-side="right"] { justify-content: flex-end; }
.hs-core-item[data-side="left"]  { justify-content: flex-start; }

.hs-item-dot {
  position: absolute; left: 50%; top: 50%;
  transform: translate(-50%, -50%);
  width: 16px; height: 16px; background: var(--gold);
  border-radius: 50%; z-index: 100; opacity: 0.4;
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 0 0 4px rgba(212, 165, 46, 0.15);
  pointer-events: none; display: block !important;
}
.hs-core-item.in-view .hs-item-dot {
  opacity: 1; transform: translate(-50%, -50%) scale(1.3);
  box-shadow: 0 0 15px rgba(212, 165, 46, 0.6), 0 0 0 8px rgba(212, 165, 46, 0.2);
}

.hs-nub {
  width: 100%; max-width: 480px;
  background: rgba(6, 18, 44, 0.85);
  border: 1px solid rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(16px);
  padding: 48px; opacity: 0;
  transform: translateY(80px);
  transition: all 0.9s cubic-bezier(0.16, 1, 0.3, 1);
  margin-top: 30vh;   /* 进一步增加偏移，对齐 80vh 的中心圆点 */
}
.hs-core-item.in-view .hs-nub { opacity: 1; transform: translateY(0); }

.hs-nub-header {
  display: flex; align-items: baseline; justify-content: space-between;
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
  padding-bottom: 20px; margin-bottom: 24px;
}
.hs-name { font-size: 28px; font-weight: 700; color: #fff; margin: 0; }
.hs-num { font-size: 48px; font-weight: 800; color: var(--gold); font-family: serif; line-height: 1; }
.hs-desc { font-size: 15px; line-height: 1.8; color: rgba(255, 255, 255, 0.8); margin-bottom: 32px; }

.hs-btn { display: inline-flex; align-items: center; gap: 12px; font-size: 14px; font-weight: 600; color: #fff; transition: 0.3s; }
.hs-btn:hover { color: var(--gold); }
.hs-btn-arrow {
  width: 36px; height: 36px; border: 1px solid rgba(255, 255, 255, 0.4); border-radius: 50%;
  display: flex; align-items: center; justify-content: center; transition: 0.3s;
}
.hs-btn:hover .hs-btn-arrow { background: var(--gold); border-color: var(--gold); }

@media (max-width: 900px) {
  .hs-axis-wrap { display: none; }
  .hs-core-item { padding: 40px 20px; align-items: flex-end; }
  .hs-nub { max-width: 100%; padding: 30px; }
}

/* 2. 背景层：全屏固定，仅透明度变化 */
.hs-bg-wrap {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  pointer-events: none;
  z-index: 1;
}
.hs-bg-sticky-box {
  position: sticky;
  top: 0;
  width: 100%; height: 100vh;
  overflow: hidden;
}
.hs-bg-item {
  position: absolute; inset: 0;
  opacity: 0;
  transition: none; /* 由 JS 线性控制实现 1:1 跟手感 */
  will-change: opacity;
}
.hs-bg-item img {
  width: 100%; height: 100%; object-fit: cover;
}
.hs-bg-blank {
  background: #fff;
  opacity: 1;
  z-index: 1;
}
.hs-overlay {
  position: absolute; inset: 0;
  background: rgba(0, 10, 30, 0.48);
  opacity: 0;
  z-index: 10;
}

/* 场景项圆点（位于中轴线上） */
.hs-item-dot {
  position: absolute;
  left: 50%; top: 50%;
  transform: translate(-50%, -50%);
  width: 14px;        /* 再次微调缩小，确保遮盖 */
  height: 14px; 
  background: var(--gold);
  border-radius: 50%;
  z-index: 100; 
  opacity: 0.4;
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 0 0 4px rgba(212, 165, 46, 0.15);
  pointer-events: none; 
  display: block !important;
}


/* ② 唯一贯穿竖线 + sticky 节点 */
.hs-axis-wrap {
  position: absolute;
  top: 0; 
  bottom: 50vh; 
  left: 50%;
  width: 0; 
  z-index: 120;       /* 必须绝对高于内容层(100) */
  pointer-events: none;
}
.hs-node-logo {
  width: 38px; height: 38px;
  object-fit: contain;
}

/* 4. 滚动内容层 */
.hs-core {
  position: relative;
  z-index: 100;
  list-style: none;
  margin: 0; padding: 0;
}

/* 标题屏 */
.hs-core-first {
  min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  text-align: center;
  padding: 0 24px;
  background: transparent;
}
.hs-first-inner {
  display: flex; flex-direction: column; align-items: center;
  margin-top: -10vh;
}
.hs-header-icon {
  width: 80px; height: 80px;
  margin-bottom: 24px;
  display: flex; align-items: center; justify-content: center;
}
.hs-header-icon img { width: 100%; height: 100%; object-fit: contain; }

.hs-main-title {
  font-size: clamp(28px, 4vw, 48px);
  color: var(--ink); font-weight: 700; line-height: 1.2;
  margin-bottom: 12px;
}
.hs-main-sub {
  font-size: clamp(20px, 2.5vw, 32px);
  font-weight: 700; line-height: 1.1;
  color: var(--ink);
}
.hs-main-sub span:first-child { color: var(--gold); }

/* 场景卡片 */
.hs-core-item {
  min-height: 100vh;
  display: flex; align-items: center;
  padding: 0 10%;
  position: relative;
}
.hs-core-item[data-side="right"] { justify-content: flex-end; }
.hs-core-item[data-side="left"]  { justify-content: flex-start; }

.hs-item-dot {
  position: absolute;
  left: 50%; top: 50%;
  transform: translate(-50%, -50%);
  width: 16px; height: 16px;
  background: var(--gold);
  border-radius: 50%;
  z-index: 100;
  opacity: 0.4;
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 0 0 4px rgba(212, 165, 46, 0.15);
  pointer-events: none;
  display: block !important;
}
.hs-core-item.in-view .hs-item-dot {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1.3);
  box-shadow: 0 0 15px rgba(212, 165, 46, 0.6), 0 0 0 8px rgba(212, 165, 46, 0.2);
}

.hs-nub {
  width: 100%; max-width: 480px;
  background: rgba(6, 18, 44, 0.85);
  border: 1px solid rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(16px);
  padding: 48px;
  opacity: 0;
  transform: translateY(80px);
  transition: all 0.9s cubic-bezier(0.16, 1, 0.3, 1);
  margin-top: 25vh;   /* 同步下移卡片，保持与 75vh 节点的水平对齐 */
}
.hs-core-item.in-view .hs-nub {
  opacity: 1; transform: translateY(0);
}
.hs-nub-header {
  display: flex; align-items: baseline; justify-content: space-between;
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
  padding-bottom: 20px; margin-bottom: 24px;
}
.hs-name { font-size: 28px; font-weight: 700; color: #fff; margin: 0; }
.hs-num { font-size: 48px; font-weight: 800; color: var(--gold); font-family: serif; line-height: 1; }
.hs-desc { font-size: 15px; line-height: 1.8; color: rgba(255, 255, 255, 0.8); margin-bottom: 32px; }

.hs-btn { display: inline-flex; align-items: center; gap: 12px; font-size: 14px; font-weight: 600; color: #fff; transition: 0.3s; }
.hs-btn:hover { color: var(--gold); }
.hs-btn-arrow {
  width: 36px; height: 36px; border: 1px solid rgba(255, 255, 255, 0.4); border-radius: 50%;
  display: flex; align-items: center; justify-content: center; transition: 0.3s;
}
.hs-btn:hover .hs-btn-arrow { background: var(--gold); border-color: var(--gold); }

@media (max-width: 900px) {
  .hs-axis-wrap { display: none; }
  .hs-core-item { padding: 40px 20px; align-items: flex-end; }
  .hs-nub { max-width: 100%; padding: 30px; }
}

/* ---------- 新闻资讯卡片 (Sanlux 风格复刻) ---------- */
.news-card {
  padding: 40px;
  background: #fff;
  border: 1px solid #eef2f7;
  border-radius: 4px;
  transition: all 0.45s cubic-bezier(0.23, 1, 0.32, 1);
  display: flex;
  flex-direction: column;
  text-decoration: none;
  position: relative;
  overflow: hidden;
}
.news-card:hover {
  transform: translateY(-12px);
  box-shadow: 0 20px 50px rgba(0, 30, 80, 0.08);
  border-color: var(--blue-600);
}
.news-card:hover .news-title { color: var(--blue-600); }

/* 三力士风格底边装饰 */
.news-card::before {
  content: ""; position: absolute; bottom: 0; left: 0; width: 0; height: 4px;
  background: var(--blue-600); transition: width 0.4s ease;
}
.news-card:hover::before { width: 100%; }

.news-date {
  font-size: 14px;
  color: var(--blue-600);
  font-weight: 700;
  margin-bottom: 16px;
  font-family: 'Inter', sans-serif;
  letter-spacing: 0.5px;
}
.news-title {
  font-size: 20px;
  font-weight: 800;
  margin-bottom: 20px;
  line-height: 1.45;
  color: var(--navy-950);
  transition: color 0.3s;
}
.news-desc {
  font-size: 15px;
  color: var(--navy-700);
  line-height: 1.8;
  flex-grow: 1;
  margin-bottom: 24px;
  opacity: 0.85;
}
.news-more {
  font-size: 13px;
  font-weight: 800;
  color: var(--gold);
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: gap 0.3s;
}
.news-card:hover .news-more { gap: 14px; }