/* ============ 设计令牌 ============ */
:root {
  --navy-950: #061523;
  --navy-900: #0a1f33;
  --navy-850: #0d2740;
  --navy-800: #12314d;
  --navy-700: #1b4569;
  --accent: #b87333;
  --accent-dark: #965c25;
  --accent-soft: #faf3ea;
  --steel-600: #5b7c96;
  --steel-500: #7f97ad;
  --steel-300: #b9c8d6;
  --paper: #f6f8fa;
  --paper-2: #eef2f6;
  --line: #dfe7ee;
  --white: #ffffff;
  --ink: #0f2438;
  --ink-2: #3d5468;
  --radius: 4px;
  --radius-lg: 8px;
  --shadow-sm: 0 1px 2px rgba(10, 31, 51, .06), 0 2px 8px rgba(10, 31, 51, .04);
  --shadow-md: 0 4px 12px rgba(10, 31, 51, .08), 0 16px 40px rgba(10, 31, 51, .08);
  --container: 1200px;
  --ease: cubic-bezier(.22, .61, .36, 1);
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI",
    "PingFang SC", "Hiragino Sans GB", "Source Han Sans SC",
    "Noto Sans CJK SC", "Microsoft YaHei", sans-serif;
}

/* ============ 基础 ============ */
*, *::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: 1.7;
  color: var(--ink);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  font-kerning: normal;
  font-feature-settings: "kern" 1, "liga" 1, "calt" 1;
}
img, svg { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4 { margin: 0; line-height: 1.22; font-weight: 700; letter-spacing: 0; }
:lang(zh) h1, :lang(zh) h2, :lang(zh) h3, :lang(zh) h4 { letter-spacing: .012em; }
p { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
button, input, textarea, select { font: inherit; color: inherit; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.section { padding: 128px 0; }
.section--tight { padding: 88px 0; }
.section--paper { background: var(--paper); }
.section--dark { background: var(--paper); color: var(--ink); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }

/* ============ 排版组件 ============ */
.eyebrow {
  display: inline-flex; align-items: center; gap: 12px;
  font-size: 12px; font-weight: 600; letter-spacing: .18em;
  text-transform: uppercase; color: var(--accent);
  margin-bottom: 22px;
}
.eyebrow::before {
  content: ""; width: 24px; height: 2px; background: var(--accent); flex: none;
}
.section--dark .eyebrow { color: var(--accent); }

.h-display { font-size: clamp(2.1rem, 4.4vw, 3.6rem); letter-spacing: -.025em; }
.h-section { font-size: clamp(1.7rem, 2.9vw, 2.5rem); }
.h-card { font-size: 1.18rem; letter-spacing: -.01em; }
.lead { font-size: clamp(1rem, 1.35vw, 1.12rem); color: var(--ink-2); line-height: 1.9; }
.section--dark .lead { color: var(--ink-2); }

.section-head { max-width: 760px; margin-bottom: 64px; }
.section-head--center { margin-left: auto; margin-right: auto; text-align: center; }
.section-head--center .eyebrow { justify-content: center; }
.section-head .h-section { margin-bottom: 16px; }

.text-accent { color: var(--accent); }
.mono { font-variant-numeric: tabular-nums; }

/* ============ 顶栏 ============ */
.topbar {
  background: var(--navy-950); color: #9fb6c9;
  font-size: 12.5px; letter-spacing: .02em;
}
.topbar .container {
  display: flex; align-items: center; justify-content: space-between;
  height: 38px; gap: 24px;
}
.topbar__left { display: flex; align-items: center; gap: 20px; }
.topbar a { color: #9fb6c9; transition: color .2s; }
.topbar a:hover { color: var(--white); }
.topbar__sep { width: 1px; height: 12px; background: #24415c; }
.lang-switch { display: inline-flex; border: 1px solid #24415c; border-radius: 3px; overflow: hidden; }
.lang-switch a { padding: 2px 9px; font-weight: 600; font-size: 11.5px; letter-spacing: .06em; }
.lang-switch a[aria-current="true"] { background: var(--accent); color: #fff; }
.lang-switch a + a { border-left: 1px solid #24415c; }

/* ============ 主导航 ============ */
.header {
  position: sticky; top: 0; z-index: 90;
  background: rgba(255, 255, 255, .96);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.header__inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 76px; gap: 32px;
}
.logo { display: flex; align-items: center; gap: 11px; flex: none; }
.logo__mark { width: 38px; height: 38px; flex: none; }
.logo__text { display: flex; flex-direction: column; line-height: 1.12; }
.logo__name { font-size: 19px; font-weight: 800; letter-spacing: .11em; color: var(--navy-900); }
.logo__sub { font-size: 10.5px; letter-spacing: .09em; color: var(--steel-500); }

.nav { display: flex; align-items: center; gap: 2px; height: 100%; }
.nav__item { position: relative; height: 100%; display: flex; align-items: center; }
.nav__link {
  display: flex; align-items: center; gap: 5px;
  padding: 0 15px; height: 100%;
  font-size: 14.5px; font-weight: 500; color: var(--ink);
  transition: color .18s;
}
.nav__link::after {
  content: ""; position: absolute; left: 15px; right: 15px; bottom: 22px; height: 2px;
  background: var(--accent); transform: scaleX(0); transform-origin: left;
  transition: transform .25s var(--ease);
}
.nav__item:hover > .nav__link, .nav__link[aria-current="page"] { color: var(--accent); }
.nav__item:hover > .nav__link::after, .nav__link[aria-current="page"]::after { transform: scaleX(1); }
.nav__caret { width: 8px; height: 5px; opacity: .55; }

.dropdown {
  position: absolute; top: 100%; left: 0; min-width: 240px;
  background: #fff; border: 1px solid var(--line); border-radius: 0 0 var(--radius) var(--radius);
  box-shadow: var(--shadow-md); padding: 8px;
  opacity: 0; visibility: hidden; transform: translateY(-6px);
  transition: opacity .2s, transform .2s, visibility .2s;
}
.nav__item:hover .dropdown { opacity: 1; visibility: visible; transform: translateY(0); }
.dropdown a {
  display: block; padding: 10px 14px; font-size: 14px; border-radius: 3px;
  color: var(--ink-2); transition: background .15s, color .15s;
}
.dropdown a:hover { background: var(--accent-soft); color: var(--accent-dark); }

.header__actions { display: flex; align-items: center; gap: 14px; flex: none; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 24px; font-size: 14px; font-weight: 600; letter-spacing: .01em;
  border: 1px solid transparent; border-radius: var(--radius);
  cursor: pointer; transition: background .18s, color .18s, border-color .18s, transform .18s;
  white-space: nowrap;
}
.btn--primary { background: var(--accent); color: #fff; }
.btn--primary:hover { background: var(--accent-dark); transform: translateY(-1px); }
.btn--ghost { border-color: var(--line); color: var(--ink); background: transparent; }
.btn--ghost:hover { border-color: var(--navy-800); color: var(--navy-900); }
.btn--light { background: #fff; color: var(--navy-900); }
.btn--light:hover { background: #e9f0f6; }
.btn--outline-light { border-color: rgba(255,255,255,.35); color: #fff; }
.btn--outline-light:hover { border-color: #fff; background: rgba(255,255,255,.08); }
.btn__arrow { transition: transform .2s; }
.btn:hover .btn__arrow { transform: translateX(3px); }

.burger { display: none; width: 42px; height: 42px; border: 1px solid var(--line); background: #fff; border-radius: 4px; cursor: pointer; }
.burger span { display: block; width: 18px; height: 2px; background: var(--navy-900); margin: 3.5px auto; transition: transform .25s, opacity .2s; }
.burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(5.5px) rotate(45deg); }
.burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-5.5px) rotate(-45deg); }

/* ============ Hero ============ */
.hero {
  position: relative; overflow: hidden;
  background: var(--navy-950); color: #fff;
  min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
}
.hero__bg { position: absolute; inset: 0; pointer-events: none; }
.hero__photo {
  position: absolute; inset: 0; width: 100%; height: 100%;
  object-fit: cover; object-position: 50% 38%;
}
.hero__shade {
  position: absolute; inset: 0;
  background:
    linear-gradient(180deg, rgba(4, 14, 24, .74) 0%, rgba(4, 14, 24, .42) 44%, rgba(4, 14, 24, .84) 100%),
    radial-gradient(ellipse 72% 62% at 50% 46%, rgba(4, 14, 24, 0) 0%, rgba(4, 14, 24, .5) 100%);
}
.hero__inner { position: relative; z-index: 2; padding: 150px 0 130px; width: 100%; }
.hero__content { max-width: 1000px; margin: 0 auto; text-align: center; }
.hero__eyebrow {
  font-size: 11.5px; font-weight: 500; letter-spacing: .3em;
  text-transform: uppercase; color: rgba(255, 255, 255, .55);
  margin-bottom: 30px;
}
.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  letter-spacing: -.035em; line-height: 1.14;
  font-weight: 700; margin-bottom: 30px;
}
.hero h1 em { font-style: normal; color: #e0a46a; }
.hero__desc {
  font-size: clamp(1rem, 1.5vw, 1.2rem);
  color: rgba(255, 255, 255, .74);
  max-width: 620px; margin: 0 auto 54px; line-height: 1.85;
}
.hero__explore { display: inline-flex; flex-direction: column; align-items: center; gap: 16px; color: #fff; }
.hero__explore-arrow {
  width: 88px; height: 88px; border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, .35);
  display: grid; place-items: center;
  transition: background .35s var(--ease), border-color .35s, transform .35s;
}
.hero__explore-arrow svg { transform: rotate(90deg); }
.hero__explore:hover .hero__explore-arrow {
  background: rgba(255, 255, 255, .12);
  border-color: rgba(255, 255, 255, .75);
  transform: translateY(4px);
}
.hero__explore-text { font-size: 12px; letter-spacing: .24em; }
.hero__scroll {
  position: absolute; bottom: 32px; left: 50%; transform: translateX(-50%);
  width: 1px; height: 60px; background: rgba(255, 255, 255, .16); overflow: hidden;
}
.hero__scroll span {
  display: block; width: 1px; height: 20px; background: rgba(255, 255, 255, .85);
  animation: scrollLine 2.2s cubic-bezier(.6, .05, .3, .95) infinite;
}
@keyframes scrollLine {
  0% { transform: translateY(-24px); }
  65% { transform: translateY(60px); }
  100% { transform: translateY(60px); }
}

/* ============ 首页透明导航 ============ */
/* 让首屏背景延伸到导航后面，导航半透明浮在图上 */
.home .hero { margin-top: -114px; padding-top: 114px; }
.home .topbar { background: rgba(4, 12, 20, .55); backdrop-filter: blur(10px); border-bottom: 1px solid rgba(255, 255, 255, .06); position: relative; z-index: 95; }
.home .header { background: rgba(6, 18, 30, .35); border-bottom-color: rgba(255, 255, 255, .08); backdrop-filter: blur(16px) saturate(140%); }
.home .header .logo__name { color: #fff; }
.home .header .logo__sub { color: rgba(255, 255, 255, .55); }
.home .header .nav__link { color: rgba(255, 255, 255, .86); }
.home .header .nav__link::after { background: #e0a46a; }
.home .header .nav__item:hover > .nav__link,
.home .header .nav__link[aria-current="page"] { color: #fff; }
.home .header .burger { background: transparent; border-color: rgba(255, 255, 255, .3); }
.home .header .burger span { background: #fff; }
.home .header.is-scrolled { background: rgba(255, 255, 255, .97); border-bottom-color: var(--line); backdrop-filter: saturate(180%) blur(12px); }
.home .header.is-scrolled .logo__name { color: var(--navy-900); }
.home .header.is-scrolled .logo__sub { color: var(--steel-500); }
.home .header.is-scrolled .nav__link { color: var(--ink); }
.home .header.is-scrolled .nav__item:hover > .nav__link,
.home .header.is-scrolled .nav__link[aria-current="page"] { color: var(--accent); }
.home .header.is-scrolled .burger { background: #fff; border-color: var(--line); }
.home .header.is-scrolled .burger span { background: var(--navy-900); }

/* ============ 统计条 ============ */
.stats { background: #fff; border-bottom: 1px solid var(--line); }
.stats__grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.stats__item {
  padding: 46px 28px; border-left: 1px solid var(--line);
  display: flex; flex-direction: column; gap: 6px; text-align: center;
}
.stats__item:first-child { border-left: 0; }
.stats__value { font-size: clamp(1.9rem, 3vw, 2.6rem); font-weight: 700; letter-spacing: -.035em; color: var(--navy-900); }
.stats__label { font-size: 12px; letter-spacing: .1em; text-transform: uppercase; color: var(--steel-500); }

/* ============ 滚动淡入 ============ */
[data-reveal] { opacity: 0; transform: translateY(26px); transition: opacity .9s var(--ease), transform .9s var(--ease); }
[data-reveal].in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  [data-reveal] { opacity: 1; transform: none; }
}


/* ============ 通用卡片 ============ */
.card {
  background: transparent; border: 0; border-radius: 0;
  overflow: visible; transition: transform .35s var(--ease);
  display: flex; flex-direction: column; height: 100%;
}
.card:hover { transform: translateY(-4px); }
.card__media { position: relative; aspect-ratio: 16 / 10; overflow: hidden; background: var(--navy-900); }
.card__media svg, .card__media img { width: 100%; height: 100%; object-fit: cover; transition: transform .8s var(--ease); }
.card:hover .card__media svg, .card:hover .card__media img { transform: scale(1.06); }
.card__media::after, .product-visual::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: linear-gradient(165deg, rgba(10, 31, 51, .02) 0%, rgba(6, 20, 33, .26) 100%);
}
.card__body { padding: 24px 0 0; display: flex; flex-direction: column; flex: 1; }
.card__tag {
  font-size: 11px; font-weight: 700; letter-spacing: .14em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 12px;
}
.card__title { margin-bottom: 12px; letter-spacing: 0; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; min-height: 2.7em; }
.card__title a { color: var(--navy-900); }
.card__title a:hover { color: var(--accent); }
.card__desc { font-size: 14px; color: var(--ink-2); line-height: 1.8; flex: 1; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.card__more {
  display: inline-flex; align-items: center; gap: 7px; margin-top: 20px;
  font-size: 13.5px; font-weight: 600; color: var(--navy-800);
}
.card__more svg { transition: transform .2s; }
.card:hover .card__more { color: var(--accent); }
.card:hover .card__more svg { transform: translateX(4px); }

.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 26px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }

/* ============ 关于/图文分栏 ============ */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 72px; align-items: center; }
.split--wide-left { grid-template-columns: 1.15fr .85fr; }
.split__media { position: relative; }
.split__media svg { width: 100%; border-radius: var(--radius-lg); }
.split__body .h-section { margin-bottom: 20px; }
.split__body p + p { margin-top: 16px; }

.checklist { margin-top: 28px; display: grid; gap: 14px; }
.checklist li { display: flex; gap: 12px; font-size: 14.5px; color: var(--ink-2); line-height: 1.65; }
.checklist svg { flex: none; margin-top: 3px; color: var(--accent); }

/* ============ 产品页视觉 ============ */
.product-visual {
  background: var(--navy-900);
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
  aspect-ratio: 16 / 10;
}
.product-visual svg, .product-visual img { display: block; width: 100%; height: 100%; object-fit: cover; }

.spec-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.spec-table th, .spec-table td { padding: 13px 16px; text-align: left; border-bottom: 1px solid var(--line); }
.spec-table tr:last-child td { border-bottom: 0; }
.spec-table th { width: 38%; font-weight: 600; color: var(--navy-800); background: var(--paper); }
.spec-table td { color: var(--ink-2); }

.pill-list { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 22px; }
.pill {
  padding: 7px 14px; font-size: 13px; border-radius: 100px;
  background: var(--paper-2); color: var(--navy-800); border: 1px solid var(--line);
}

/* ============ 服务条目 ============ */
.service-item {
  display: grid; grid-template-columns: 56px 1fr; gap: 20px;
  padding: 30px 0; border-top: 1px solid var(--line);
}
.service-item:first-child { border-top: 0; }
.service-item__icon {
  width: 56px; height: 56px; border-radius: 8px; display: grid; place-items: center;
  background: var(--accent-soft); color: var(--accent); flex: none;
}
.service-item h3 { font-size: 1.1rem; margin-bottom: 8px; }
.service-item p { font-size: 14.5px; color: var(--ink-2); }

/* ============ 时间轴 ============ */
.timeline { position: relative; padding-left: 0; }
.timeline::before {
  content: ""; position: absolute; left: 0; top: 8px; bottom: 8px; width: 2px; background: var(--line);
}
.timeline__item { position: relative; padding: 0 0 34px 34px; }
.timeline__item:last-child { padding-bottom: 0; }
.timeline__item::before {
  content: ""; position: absolute; left: -5px; top: 7px; width: 12px; height: 12px;
  border-radius: 50%; background: #fff; border: 3px solid var(--accent);
}
.timeline__year { font-size: 13px; font-weight: 700; letter-spacing: .08em; color: var(--accent); margin-bottom: 6px; }
.timeline__title { font-size: 1.05rem; font-weight: 700; margin-bottom: 6px; }
.timeline__text { font-size: 14px; color: var(--ink-2); }

/* ============ 案例 ============ */
.case-card { position: relative; border-radius: var(--radius-lg); overflow: hidden; background: var(--navy-900); display: block; }
.case-card__media { aspect-ratio: 4 / 3; }
.case-card__media svg, .case-card__media img { width: 100%; height: 100%; object-fit: cover; transition: transform .55s var(--ease); }
.case-card:hover .case-card__media svg, .case-card:hover .case-card__media img { transform: scale(1.06); }
.case-card__overlay {
  position: absolute; inset: 0; padding: 24px;
  display: flex; flex-direction: column; justify-content: flex-end;
  background: linear-gradient(to top, rgba(6,21,35,.92) 0%, rgba(6,21,35,.42) 48%, rgba(6,21,35,0) 78%);
  color: #fff;
}
.case-card__tag { font-size: 11px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; color: #e0a46a; margin-bottom: 8px; }
.case-card__title { font-size: 1.05rem; margin-bottom: 6px; }
.case-card__meta { font-size: 12.5px; color: #a9c0d4; }
.case-card:hover .case-card__title { color: #e0a46a; }

/* ============ 新闻列表 ============ */
.news-list { display: flex; flex-direction: column; }
.news-row {
  display: grid; grid-template-columns: 104px 1fr auto; gap: 28px; align-items: center;
  padding: 26px 0; border-bottom: 1px solid var(--line);
  transition: background .2s;
}
.news-row:first-child { border-top: 1px solid var(--line); }
.news-row:hover { background: var(--paper); }
.news-row__date { display: flex; flex-direction: column; }
.news-row__day { font-size: 1.6rem; font-weight: 700; color: var(--navy-900); line-height: 1; }
.news-row__month { font-size: 12px; letter-spacing: .08em; color: var(--steel-500); text-transform: uppercase; margin-top: 4px; }
.news-row__title { font-size: 1.02rem; font-weight: 600; color: var(--navy-900); margin-bottom: 5px; }
.news-row:hover .news-row__title { color: var(--accent); }
.news-row__excerpt { font-size: 13.5px; color: var(--ink-2); }
.news-row__cat { font-size: 11.5px; font-weight: 600; letter-spacing: .07em; text-transform: uppercase; color: var(--steel-600); border: 1px solid var(--line); padding: 4px 10px; border-radius: 100px; white-space: nowrap; }

/* ============ CTA 区 ============ */
.cta {
  position: relative; overflow: hidden;
  background: linear-gradient(118deg, var(--navy-900) 0%, var(--navy-800) 58%, #1d5277 100%);
  color: #fff; padding: 76px 0;
}
.cta::before {
  content: ""; position: absolute; right: -160px; top: -180px; width: 620px; height: 620px;
  background: radial-gradient(circle, rgba(184,115,51,.26), transparent 62%);
}
.cta__inner { position: relative; display: grid; grid-template-columns: 1.4fr .6fr; gap: 48px; align-items: center; }
.cta h2 { font-size: clamp(1.6rem, 2.6vw, 2.15rem); margin-bottom: 14px; letter-spacing: -.02em; }
.cta p { color: #b7cddd; max-width: 560px; }
.cta__actions { display: flex; gap: 14px; justify-content: flex-end; flex-wrap: wrap; }

/* ============ 页头 ============ */
.page-head {
  background: #fff; color: var(--ink);
  padding: 128px 0 64px;
  border-bottom: 1px solid var(--line);
  position: relative;
}
.page-head::before { content: none; }
.page-head__inner { position: relative; }
.page-head h1 { font-size: clamp(2.1rem, 4.2vw, 3.3rem); margin-bottom: 18px; letter-spacing: .01em; line-height: 1.16; color: var(--navy-950); }
.page-head p { color: var(--ink-2); max-width: 600px; font-size: 1.02rem; line-height: 1.85; }
.breadcrumb { display: flex; align-items: center; gap: 9px; font-size: 12.5px; color: var(--steel-500); margin-top: 30px; letter-spacing: .05em; text-transform: uppercase; }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb__sep { opacity: .5; }
.breadcrumb [aria-current="page"] { color: var(--navy-900); }

/* ============ 表单 ============ */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.field { display: flex; flex-direction: column; gap: 7px; }
.field--full { grid-column: 1 / -1; }
.field label { font-size: 12.5px; font-weight: 600; letter-spacing: .04em; color: var(--navy-800); }
.field label .req { color: var(--accent); margin-left: 3px; }
.field input, .field select, .field textarea {
  padding: 12px 14px; border: 1px solid var(--line); border-radius: var(--radius);
  background: #fff; font-size: 14.5px; transition: border-color .18s, box-shadow .18s;
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(184,115,51,.10);
}
.field textarea { min-height: 128px; resize: vertical; }
.form-note { font-size: 12.5px; color: var(--steel-500); margin-top: 14px; }
.form-ok {
  padding: 14px 18px; border-radius: var(--radius); font-size: 14px;
  background: #eaf7ef; border: 1px solid #b7e3c6; color: #1c6b3c; margin-bottom: 20px;
}

/* ============ 联系信息块 ============ */
.contact-grid { display: grid; grid-template-columns: 1fr 1.1fr; gap: 64px; align-items: start; }
.contact-item { display: flex; gap: 16px; padding: 22px 0; border-bottom: 1px solid var(--line); }
.contact-item:first-of-type { border-top: 1px solid var(--line); }
.contact-item__icon { width: 42px; height: 42px; border-radius: 6px; background: var(--accent-soft); color: var(--accent); display: grid; place-items: center; flex: none; }
.contact-item__label { font-size: 11.5px; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; color: var(--steel-500); margin-bottom: 4px; }
.contact-item__value { font-size: 15px; font-weight: 500; color: var(--navy-900); }
.contact-item__value a:hover { color: var(--accent); }
.contact-item__extra { font-size: 13px; color: var(--ink-2); margin-top: 4px; }

/* ============ 页脚 ============ */
.footer { background: var(--navy-950); color: #8ba5ba; padding: 68px 0 0; font-size: 14px; }
.footer__grid { display: grid; grid-template-columns: 1.6fr repeat(3, 1fr); gap: 48px; padding-bottom: 52px; }
.footer__brand .logo__name { color: #fff; }
.footer__brand .logo__sub { color: #7f9cb3; }
.footer__about { margin-top: 20px; font-size: 13.5px; line-height: 1.75; color: #8ba5ba; max-width: 320px; }
.footer h4 { color: #fff; font-size: 13px; letter-spacing: .1em; text-transform: uppercase; margin-bottom: 18px; font-weight: 600; }
.footer__links { display: flex; flex-direction: column; gap: 11px; }
.footer__links a { color: #8ba5ba; font-size: 13.5px; transition: color .18s; }
.footer__links a:hover { color: #fff; }
.footer__contact p { margin-bottom: 10px; font-size: 13.5px; line-height: 1.65; }
.footer__contact b { color: #fff; font-weight: 600; }
.footer__bottom {
  border-top: 1px solid rgba(255,255,255,.09); padding: 22px 0;
  display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap;
  font-size: 12.5px; color: #6f8ba2;
}
.footer__bottom a:hover { color: #fff; }

/* ============ 杂项 ============ */
.anchor-offset { scroll-margin-top: 96px; }
.no-scroll { overflow: hidden; }

/* ============ 响应式 ============ */
@media (max-width: 1080px) {
  .nav__link { padding: 0 11px; font-size: 14px; }
  .hero__blueprint { opacity: .28; width: 460px; }
  .split { gap: 48px; }
  .cta__inner { grid-template-columns: 1fr; gap: 28px; }
  .cta__actions { justify-content: flex-start; }
}

@media (max-width: 940px) {
  .topbar__left .hide-sm { display: none; }
  .burger { display: block; }
  .header__actions .btn { display: none; }
  .nav {
    position: fixed; inset: 76px 0 0; flex-direction: column; align-items: stretch;
    background: #fff; padding: 20px 24px 40px; gap: 0; overflow-y: auto;
    transform: translateX(100%); transition: transform .3s var(--ease); height: auto;
    border-top: 1px solid var(--line);
  }
  .nav[data-open="true"] { transform: translateX(0); }
  .nav__item { height: auto; display: block; border-bottom: 1px solid var(--line); }
  .nav__link { padding: 15px 0; font-size: 16px; height: auto; }
  .nav__link::after { display: none; }
  .dropdown { position: static; opacity: 1; visibility: visible; transform: none; box-shadow: none; border: 0; padding: 0 0 12px 14px; background: transparent; }
  .dropdown a { padding: 9px 0; font-size: 14.5px; }
  .hero { min-height: auto; }
  .hero__inner { padding: 72px 0 64px; }
  .hero__blueprint { display: none; }
  .hero__photo { object-position: 62% 32%; opacity: .62; }
  .hero__shade {
    background: linear-gradient(180deg, rgba(6, 21, 35, .82) 0%, rgba(6, 21, 35, .95) 58%, #061523 100%);
  }
  .stats__grid { grid-template-columns: repeat(2, 1fr); }
  .stats__item:nth-child(3) { border-left: 0; border-top: 1px solid rgba(255,255,255,.08); }
  .stats__item:nth-child(4) { border-top: 1px solid rgba(255,255,255,.08); }
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .split, .split--wide-left { grid-template-columns: 1fr; gap: 40px; }
  .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .footer__grid { grid-template-columns: 1fr 1fr; gap: 36px; }
  .section { padding: 72px 0; }
  .news-row { grid-template-columns: 76px 1fr; gap: 18px; }
  .news-row__cat { display: none; }
}

@media (max-width: 620px) {
  .container { padding: 0 18px; }
  .section { padding: 60px 0; }
  .grid-3, .grid-4, .grid-2 { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr; }
  .hero__meta { gap: 22px; }
  .hero__meta b { font-size: 1.25rem; }
  .topbar .container { height: auto; padding: 7px 18px; flex-wrap: wrap; gap: 6px; }
  .header__inner { height: 68px; }
  .logo__mark { width: 32px; height: 32px; }
  .logo__name { font-size: 16.5px; }
  .section-head { margin-bottom: 36px; }
  .news-row { grid-template-columns: 64px 1fr; }
  .breadcrumb { display: none; }
  .service-item { grid-template-columns: 44px 1fr; gap: 14px; }
  .service-item__icon { width: 44px; height: 44px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001ms !important; transition-duration: .001ms !important; scroll-behavior: auto !important; }
}


/* ============ 服务编号列表（首页深色区） ============ */
.svc-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0 80px; }
.svc {
  display: grid; grid-template-columns: 54px 1fr; gap: 12px;
  padding: 40px 0; border-top: 1px solid var(--line);
}
.svc__num { font-size: 12px; font-weight: 600; letter-spacing: .14em; color: var(--accent); padding-top: 5px; }
.svc h3 { font-size: 1.06rem; color: var(--navy-900); margin-bottom: 10px; letter-spacing: .01em; }
.svc p { font-size: 14px; color: var(--ink-2); line-height: 1.85; }
@media (max-width: 940px) { .svc-grid { grid-template-columns: 1fr; gap: 0; } }


/* ============ 中文排版精修 ============ */
/* 中文笔画密，700 会显笨重，用 600 并放开字距 */
:lang(zh) h1, :lang(zh) h2, :lang(zh) h3, :lang(zh) h4 {
  font-weight: 600;
  letter-spacing: .035em;
  line-height: 1.32;
}
:lang(zh) .hero h1 { letter-spacing: .015em; font-weight: 600; }
:lang(zh) .page-head h1 { font-size: clamp(1.85rem, 3.2vw, 2.6rem); letter-spacing: .04em; font-weight: 600; }
:lang(zh) .h-display { letter-spacing: .01em; }
:lang(zh) body { letter-spacing: .012em; }
:lang(zh) .h-section { font-size: clamp(1.5rem, 2.5vw, 2.05rem); letter-spacing: .04em; line-height: 1.45; }
:lang(zh) .h-display { letter-spacing: .03em; }
:lang(zh) p, :lang(zh) li { line-height: 1.85; }
/* 数字与单位用等宽数位，混排更整齐 */
.mono, .stats__value, .timeline__year { font-variant-numeric: tabular-nums; }
/* 中文标题下的小标签略收紧 */
:lang(zh) .eyebrow { letter-spacing: .2em; font-weight: 600; }
/* 按钮文字不撑开 */
:lang(zh) .btn { letter-spacing: .02em; font-weight: 500; }


/* ============ 大图两列（对标 fortune-gas 的产品展示） ============ */
.grid-2--wide { gap: 40px 32px; }
.grid-2--wide .card__media { aspect-ratio: 16 / 10; }
.grid-2--wide .card__title { font-size: 1.32rem; }
.grid-2--wide .card__desc { font-size: 14.5px; }
@media (max-width: 940px) { .grid-2--wide { grid-template-columns: 1fr; } }


/* ============ 细节打磨 ============ */
::selection { background: rgba(184, 115, 51, .22); color: var(--navy-950); }
html { scrollbar-color: #c3ccd6 #f2f4f7; scrollbar-width: thin; }
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: #f2f4f7; }
::-webkit-scrollbar-thumb { background: #c3ccd6; border-radius: 5px; border: 2px solid #f2f4f7; }
::-webkit-scrollbar-thumb:hover { background: #a9b4c0; }

/* 按钮：从圆角改为近直角，工业感 */
.btn { border-radius: 2px; }
.btn--primary:hover { transform: translateY(-2px); box-shadow: 0 8px 20px rgba(184, 115, 51, .18); }

/* 导航下拉：更克制的阴影与边框 */
.dropdown { border-radius: 0 0 3px 3px; box-shadow: 0 12px 32px rgba(10, 31, 51, .10); }
.dropdown a { border-radius: 2px; }

/* 表单：聚焦态更明确 */
.field input:focus, .field select:focus, .field textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(184, 115, 51, .10);
}
.field input, .field select, .field textarea { border-radius: 2px; }

/* 页脚：链接悬停加下划线，信息更易扫读 */
.footer__links a { position: relative; }
.footer__links a:hover { color: #fff; }
.footer__contact a:hover { color: #fff; }

/* 卡片：悬停时标题变色更柔和 */
.card:hover .card__title a { color: var(--accent-dark); }

/* 图片加载淡入，避免闪白 */
.card__media img, .product-visual img, .case-card__media img { animation: imgIn .6s var(--ease) both; }
@keyframes imgIn { from { opacity: 0; } to { opacity: 1; } }

/* 锚点定位避开固定导航 */
[id] { scroll-margin-top: 96px; }

/* 面包屑分隔符更淡 */
.breadcrumb__sep { opacity: .35; }

/* 打印时去掉冗余 */
@media print {
  .header, .topbar, .footer, .cta, .hero__scroll, .burger { display: none !important; }
}