/* =========================================================
   浙江长远交通建设有限公司 — 企业官网样式表
   风格：简约商务 · 藏青
   ========================================================= */

/* ---------- 1. 设计变量 ---------- */
:root {
  --navy-900: #0B1F35;
  --navy-800: #0E2A47;
  --navy-700: #153A5E;
  --navy-600: #1E4A75;
  --accent: #B98A4B;
  --accent-text: #8F6229;      /* 浅底上的铜金文字，保证 4.5:1 以上对比度 */
  --accent-soft: #E7D7BE;
  --ink: #14202C;
  --text: #4C5A68;
  --muted: #66747F;
  --line: #E4E9EF;
  --line-strong: #D5DDE6;
  --bg: #FFFFFF;
  --bg-soft: #F6F8FA;
  --bg-warm: #FAF9F7;

  --radius: 2px;
  --shadow-sm: 0 1px 2px rgba(11, 31, 53, .06);
  --shadow-md: 0 16px 40px rgba(11, 31, 53, .10);

  --container: 1200px;
  --font: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB",
          "Source Han Sans SC", -apple-system, BlinkMacSystemFont,
          "Segoe UI", Roboto, sans-serif;

  --ease: cubic-bezier(.2, .7, .3, 1);
}

/* ---------- 2. 基础重置 ---------- */
*, *::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(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img, svg { display: block; max-width: 100%; }
img { height: auto; }

a { color: inherit; text-decoration: none; }

h1, h2, h3, h4, p, ul, ol, figure { margin: 0; }
ul, ol { padding: 0; list-style: none; }

button { font: inherit; }

::selection { background: var(--navy-800); color: #fff; }

:focus-visible {
  outline: 2px solid var(--navy-600);
  outline-offset: 3px;
}

.skip-link {
  position: absolute; left: 16px; top: -60px; z-index: 200;
  background: var(--navy-800); color: #fff; padding: 10px 18px;
  transition: top .25s;
}
.skip-link:focus { top: 12px; }

/* ---------- 3. 布局容器 ---------- */
.container {
  width: min(var(--container), calc(100% - 48px));
  margin-inline: auto;
}
.container--narrow { width: min(920px, calc(100% - 48px)); }

.section { padding: 96px 0; }
.section--soft { background: var(--bg-soft); }
.section--warm { background: var(--bg-warm); }
.section--tight { padding: 72px 0; }

/* ---------- 4. 排版组件 ---------- */
.eyebrow {
  margin: 0;
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: .28em;
  text-transform: uppercase;
  color: var(--accent-text);
}
.eyebrow--light { color: var(--accent-soft); }

.sec-head {
  max-width: 760px;
  margin: 0 auto 56px;
  text-align: center;
}
.sec-head--left { margin-left: 0; text-align: left; }
.sec-title {
  margin: 0;
  font-size: clamp(24px, 2.6vw, 32px);
  font-weight: 600;
  letter-spacing: .05em;
  color: var(--ink);
  line-height: 1.42;
}
.sec-head .sec-title::after {
  content: "";
  display: block;
  width: 42px; height: 2px;
  margin: 22px auto 0;
  background: var(--accent);
}
.sec-head--left .sec-title::after { margin-left: 0; }
.sec-desc {
  margin-top: 18px;
  font-size: 15.5px;
  line-height: 1.9;
  color: var(--text);
}
.eyebrow + .sec-title { margin-top: 14px; }
.rule {
  display: block;
  width: 42px;
  height: 2px;
  margin: 22px 0 24px;
  background: var(--accent);
}
.rule--center { margin-inline: auto; }

/* ---------- 5. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 30px;
  font-size: 14.5px;
  font-weight: 500;
  letter-spacing: .08em;
  border: 1px solid transparent;
  border-radius: var(--radius);
  cursor: pointer;
  white-space: nowrap;
  transition: background-color .3s var(--ease), color .3s var(--ease),
              border-color .3s var(--ease), transform .3s var(--ease),
              box-shadow .3s var(--ease);
}
.btn svg { width: 15px; height: 15px; }

.btn--primary { background: var(--navy-800); color: #fff; }
.btn--primary:hover {
  background: var(--navy-700);
  transform: translateY(-2px);
  box-shadow: 0 12px 26px rgba(14, 42, 71, .22);
}

.btn--ghost { border-color: rgba(255,255,255,.42); color: #fff; }
.btn--ghost:hover {
  background: rgba(255,255,255,.10);
  border-color: #fff;
  transform: translateY(-2px);
}

.btn--outline { border-color: var(--navy-800); color: var(--navy-800); }
.btn--outline:hover { background: var(--navy-800); color: #fff; }

.btn--light { background: #fff; color: var(--navy-800); }
.btn--light:hover {
  background: var(--bg-soft);
  transform: translateY(-2px);
  box-shadow: 0 12px 26px rgba(0,0,0,.18);
}

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13.5px;
  font-weight: 500;
  letter-spacing: .06em;
  color: var(--navy-700);
  transition: gap .25s var(--ease), color .25s var(--ease);
}
.link-arrow svg { width: 15px; height: 15px; transition: transform .25s var(--ease); }
.link-arrow:hover { color: var(--accent-text); }
.link-arrow:hover svg { transform: translateX(4px); }

/* ---------- 6. 顶部信息条 ---------- */
.topbar {
  background: var(--navy-900);
  color: rgba(255,255,255,.70);
  font-size: 12.5px;
  letter-spacing: .05em;
}
.topbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 36px;
}
.topbar__note { white-space: nowrap; }
.topbar__meta { display: flex; gap: 26px; }
.topbar__meta span { display: inline-flex; align-items: center; gap: 7px; }
.topbar__meta svg {
  width: 13px; height: 13px;
  stroke: var(--accent);
  fill: none;
  stroke-width: 1.6;
}
.topbar a:hover { color: #fff; }

/* ---------- 7. 页头与导航 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 70;
  background: rgba(255,255,255,.94);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
  transition: box-shadow .3s var(--ease);
}
.site-header.is-scrolled { box-shadow: 0 8px 28px rgba(11,31,53,.07); }

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  height: 84px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 13px;
  flex: 0 0 auto;
}
.brand__mark {
  width: auto;
  height: 44px;
  flex: 0 0 auto;
}
.brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1;
}
.brand__text strong {
  font-size: 19px;
  font-weight: 600;
  letter-spacing: .08em;
  color: var(--navy-900);
  white-space: nowrap;
}
.brand__text small {
  margin-top: 7px;
  font-size: 7.4px;
  font-weight: 500;
  letter-spacing: .14em;
  color: var(--muted);
  white-space: nowrap;
}

.nav {
  display: flex;
  align-items: center;
  gap: 2px;
}
.nav a {
  position: relative;
  padding: 10px 15px;
  font-size: 15px;
  letter-spacing: .04em;
  color: var(--text);
  transition: color .25s var(--ease);
}
.nav a::after {
  content: "";
  position: absolute;
  left: 15px; right: 15px; bottom: 1px;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .3s var(--ease);
}
.nav a:hover { color: var(--ink); }
.nav a:hover::after,
.nav a.is-active::after { transform: scaleX(1); }
.nav a.is-active { color: var(--ink); font-weight: 600; }

.nav__cta {
  margin-left: 10px;
  padding: 10px 22px !important;
  background: var(--navy-800);
  color: #fff !important;
  border-radius: var(--radius);
  font-weight: 500;
  transition: background-color .3s var(--ease);
}
.nav__cta::after { display: none !important; }
.nav__cta:hover { background: var(--navy-700); }

.nav-toggle {
  display: none;
  position: relative;
  width: 44px; height: 44px;
  margin-right: -10px;
  padding: 0;
  background: none;
  border: 0;
  cursor: pointer;
  z-index: 90;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  position: absolute;
  left: 50%;
  width: 24px; height: 1.6px;
  background: var(--navy-800);
  transform: translateX(-50%);
  transition: transform .3s var(--ease), opacity .2s, top .3s var(--ease);
}
.nav-toggle span { top: 50%; margin-top: -.8px; }
.nav-toggle span::before { content: ""; left: 0; top: -7px; transform: none; }
.nav-toggle span::after  { content: ""; left: 0; top: 7px;  transform: none; }
.nav-toggle.is-active span { background: transparent; }
.nav-toggle.is-active span::before { top: 0; transform: rotate(45deg); }
.nav-toggle.is-active span::after  { top: 0; transform: rotate(-45deg); }

.nav-backdrop {
  position: fixed;
  inset: 0;
  z-index: 75;
  background: rgba(11,31,53,.42);
  opacity: 0;
  visibility: hidden;
  transition: opacity .3s var(--ease), visibility .3s;
}
.nav-backdrop.is-active { opacity: 1; visibility: visible; }

/* ---------- 8. 首页主视觉 ---------- */
.hero {
  position: relative;
  display: flex;
  align-items: center;
  min-height: clamp(520px, 74vh, 720px);
  overflow: hidden;
  background: var(--navy-900);
}
.hero__media { position: absolute; inset: 0; }
.hero__media img {
  width: 100%; height: 100%;
  object-fit: cover;
}
.hero__overlay {
  position: absolute; inset: 0;
  background: linear-gradient(90deg,
    rgba(11,31,53,.94) 0%,
    rgba(11,31,53,.82) 38%,
    rgba(11,31,53,.46) 68%,
    rgba(11,31,53,.18) 100%);
}
.hero__inner {
  position: relative;
  z-index: 2;
  max-width: 720px;
  padding: 104px 0 148px;
}
.hero__title {
  margin: 18px 0 22px;
  font-size: clamp(34px, 4.6vw, 58px);
  font-weight: 600;
  line-height: 1.26;
  letter-spacing: .03em;
  color: #fff;
}
.hero__desc {
  max-width: 520px;
  font-size: 16.5px;
  line-height: 1.95;
  color: rgba(255,255,255,.74);
}
.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 38px;
}
.hero__scroll {
  position: absolute;
  right: 40px; bottom: 120px;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 11px;
  letter-spacing: .22em;
  color: rgba(255,255,255,.5);
  writing-mode: vertical-rl;
}
.hero__scroll::after {
  content: "";
  width: 1px; height: 56px;
  background: linear-gradient(rgba(255,255,255,.5), transparent);
  animation: scrollLine 2.2s ease-in-out infinite;
}
@keyframes scrollLine {
  0%, 100% { transform: scaleY(.4); transform-origin: top; opacity: .4; }
  50% { transform: scaleY(1); transform-origin: top; opacity: 1; }
}

/* ---------- 9. 数据条 ---------- */
.stats { position: relative; z-index: 4; margin-top: -82px; }
.stats__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-md);
}
.stat {
  padding: 36px 30px;
  border-left: 1px solid var(--line);
}
.stat:first-child { border-left: 0; }
.stat__num {
  display: flex;
  align-items: baseline;
  gap: 4px;
  font-size: 38px;
  font-weight: 700;
  line-height: 1;
  color: var(--navy-800);
  letter-spacing: .01em;
}
.stat__num small {
  font-size: 16px;
  font-weight: 600;
  color: var(--accent-text);
}
.stat__label {
  margin-top: 12px;
  font-size: 13.5px;
  letter-spacing: .06em;
  color: var(--muted);
}

/* ---------- 10. 图文分栏 ---------- */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 68px;
  align-items: center;
}
.split__media { position: relative; }
.split__media img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}
.split__media::before {
  content: "";
  position: absolute;
  left: -18px; top: -18px;
  width: 104px; height: 104px;
  border-left: 2px solid var(--accent);
  border-top: 2px solid var(--accent);
  z-index: 2;
}
.split__media::after {
  content: "";
  position: absolute;
  right: -18px; bottom: -18px;
  width: 104px; height: 104px;
  border-right: 2px solid var(--line-strong);
  border-bottom: 2px solid var(--line-strong);
}

.checklist {
  display: grid;
  gap: 14px;
  margin: 30px 0 34px;
}
.checklist li {
  display: flex;
  gap: 13px;
  align-items: flex-start;
  font-size: 15px;
  color: var(--text);
}
.checklist li::before {
  content: "";
  flex: 0 0 6px;
  width: 6px; height: 6px;
  margin-top: 11px;
  background: var(--accent);
}

.lead {
  font-size: 16px;
  line-height: 1.95;
  color: var(--text);
}
.lead + .lead { margin-top: 16px; }

.mini-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-top: 38px;
  padding-top: 30px;
  border-top: 1px solid var(--line);
}
.mini-stats > div {
  padding-left: 26px;
  border-left: 1px solid var(--line);
}
.mini-stats > div:first-child { padding-left: 0; border-left: 0; }
.mini-stats strong {
  display: block;
  font-size: 27px;
  font-weight: 700;
  line-height: 1.25;
  color: var(--navy-800);
}
.mini-stats span {
  display: block;
  margin-top: 6px;
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--muted);
}

/* ---------- 11. 深色优势条 ---------- */
.band {
  padding: 76px 0;
  background: var(--navy-800);
  color: #fff;
}
.band__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}
.band__item {
  padding: 0 34px;
  border-left: 1px solid rgba(255,255,255,.14);
}
.band__item:first-child { padding-left: 0; border-left: 0; }
.band__item:last-child { padding-right: 0; }
.band__index {
  display: block;
  margin-bottom: 14px;
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--accent);
}
.band__item h3 {
  font-size: 18px;
  font-weight: 600;
  letter-spacing: .04em;
  color: #fff;
}
.band__item p {
  margin-top: 12px;
  font-size: 14px;
  line-height: 1.85;
  color: rgba(255,255,255,.62);
}

/* ---------- 12. 业务卡片 ---------- */
.biz-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.biz-card {
  position: relative;
  padding: 40px 34px;
  background: #fff;
  border: 1px solid var(--line);
  transition: transform .35s var(--ease), box-shadow .35s var(--ease),
              border-color .35s var(--ease);
}
.biz-card::before {
  content: "";
  position: absolute;
  left: 0; top: 0;
  width: 100%; height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .45s var(--ease);
}
.biz-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: transparent;
}
.biz-card:hover::before { transform: scaleX(1); }
.biz-card__icon {
  width: 46px; height: 46px;
  margin-bottom: 24px;
  color: var(--navy-700);
}
.biz-card__icon svg { width: 100%; height: 100%; }
.biz-card h3 {
  font-size: 19px;
  font-weight: 600;
  letter-spacing: .04em;
  color: var(--ink);
}
.biz-card p {
  margin-top: 12px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--text);
}
.biz-card .link-arrow { margin-top: 24px; }

/* ---------- 13. 工程业绩 ---------- */
.project-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.project-card {
  display: block;
  background: #fff;
  border: 1px solid var(--line);
  overflow: hidden;
  transition: transform .35s var(--ease), box-shadow .35s var(--ease);
}
.project-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.project-card__media {
  position: relative;
  overflow: hidden;
  background: var(--bg-soft);
}
.project-card__media img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  transition: transform .7s var(--ease);
}
.project-card:hover .project-card__media img { transform: scale(1.05); }
.project-card__tag {
  position: absolute;
  left: 0; top: 0;
  padding: 6px 14px;
  font-size: 11.5px;
  letter-spacing: .12em;
  color: #fff;
  background: rgba(14,42,71,.9);
}
.project-card__body { padding: 24px 26px 28px; }
.project-card h3 {
  font-size: 17.5px;
  font-weight: 600;
  letter-spacing: .03em;
  color: var(--ink);
  line-height: 1.55;
}
.project-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin-top: 12px;
  font-size: 13px;
  color: var(--muted);
}
.project-card__meta span { display: inline-flex; align-items: center; gap: 6px; }
.project-card__meta svg { width: 13px; height: 13px; stroke: var(--accent); fill: none; stroke-width: 1.6; }

/* 筛选 */
.filter {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 40px;
}
.filter button {
  padding: 9px 22px;
  font-size: 14px;
  letter-spacing: .05em;
  color: var(--text);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  cursor: pointer;
  transition: all .3s var(--ease);
}
.filter button:hover { border-color: var(--navy-700); color: var(--navy-700); }
.filter button.is-active {
  background: var(--navy-800);
  border-color: var(--navy-800);
  color: #fff;
}
.project-card[hidden] { display: none; }

/* ---------- 14. 新闻 ---------- */
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.news-card {
  display: flex;
  flex-direction: column;
  background: #fff;
  border: 1px solid var(--line);
  overflow: hidden;
  transition: transform .35s var(--ease), box-shadow .35s var(--ease);
}
.news-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.news-card__media { overflow: hidden; background: var(--bg-soft); }
.news-card__media img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  transition: transform .7s var(--ease);
}
.news-card:hover .news-card__media img { transform: scale(1.05); }
.news-card__body { padding: 26px 26px 30px; }
.news-card__date {
  font-size: 12.5px;
  letter-spacing: .1em;
  color: var(--muted);
}
.news-card h3 {
  margin-top: 12px;
  font-size: 17px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--ink);
  letter-spacing: .02em;
  transition: color .25s;
}
.news-card:hover h3 { color: var(--navy-700); }
.news-card p {
  margin-top: 10px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* 新闻列表 */
.news-list { border-top: 1px solid var(--line); }
.news-item {
  display: grid;
  grid-template-columns: 96px 1fr 24px;
  gap: 32px;
  align-items: center;
  padding: 30px 4px;
  border-bottom: 1px solid var(--line);
  transition: background-color .3s var(--ease), padding .3s var(--ease);
}
.news-item:hover { background: var(--bg-soft); padding-left: 16px; }
.news-item__date {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-right: 28px;
  border-right: 1px solid var(--line);
}
.news-item__day {
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  color: var(--navy-800);
}
.news-item__ym {
  margin-top: 8px;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--muted);
}
.news-item h3 {
  font-size: 17.5px;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: .02em;
  transition: color .25s;
}
.news-item:hover h3 { color: var(--navy-700); }
.news-item p {
  margin-top: 8px;
  font-size: 14px;
  color: var(--text);
  line-height: 1.8;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-item__arrow {
  width: 18px; height: 18px;
  color: var(--muted);
  transition: transform .3s var(--ease), color .3s;
}
.news-item:hover .news-item__arrow { transform: translateX(4px); color: var(--accent); }

/* 侧边栏 */
.news-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 64px;
  align-items: start;
}
.sidebar__box {
  padding: 32px 30px;
  background: var(--bg-soft);
  border: 1px solid var(--line);
}
.sidebar__box + .sidebar__box { margin-top: 24px; }
.sidebar__title {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 22px;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: .06em;
  color: var(--ink);
}
.sidebar__title::before {
  content: "";
  width: 3px; height: 16px;
  background: var(--accent);
}
.cat-list { display: grid; }
.cat-list a {
  display: flex;
  justify-content: space-between;
  padding: 12px 0;
  font-size: 14.5px;
  border-bottom: 1px dashed var(--line-strong);
  transition: color .25s;
}
.cat-list a:last-child { border-bottom: 0; }
.cat-list a:hover { color: var(--navy-700); }
.cat-list span { color: var(--muted); font-size: 13px; }

/* ---------- 15. 资质荣誉 ---------- */
.cert-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.cert-card {
  padding: 14px;
  background: #fff;
  border: 1px solid var(--line);
  transition: transform .35s var(--ease), box-shadow .35s var(--ease);
}
.cert-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.cert-card img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  background: var(--bg-soft);
}
.cert-card p {
  margin-top: 16px;
  padding: 0 4px 6px;
  font-size: 14px;
  line-height: 1.6;
  text-align: center;
  color: var(--ink);
}

.honor-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0 48px;
}
.honor-item {
  display: flex;
  gap: 18px;
  align-items: flex-start;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}
.honor-item__year {
  flex: 0 0 auto;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .08em;
  color: var(--accent-text);
  padding-top: 3px;
}
.honor-item h4 {
  font-size: 15.5px;
  font-weight: 500;
  color: var(--ink);
  line-height: 1.65;
}

/* ---------- 16. CTA 区块 ---------- */
.cta {
  position: relative;
  overflow: hidden;
  background: var(--navy-900);
  color: #fff;
}
.cta__bg { position: absolute; inset: 0; opacity: .22; }
.cta__bg img { width: 100%; height: 100%; object-fit: cover; }
.cta__inner {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  padding: 68px 0;
}
.cta__title {
  font-size: clamp(24px, 2.8vw, 34px);
  font-weight: 600;
  letter-spacing: .05em;
  line-height: 1.4;
}
.cta__desc {
  margin-top: 14px;
  font-size: 15px;
  letter-spacing: .03em;
  color: rgba(255,255,255,.66);
}

/* ---------- 17. 页脚 ---------- */
.site-footer {
  background: var(--navy-900);
  color: rgba(255,255,255,.60);
  font-size: 14px;
}
.footer__main {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.4fr;
  gap: 48px;
  padding: 72px 0 56px;
}
.footer__lockup {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 24px;
}
.footer__lockup img {
  width: auto;
  height: 42px;
  flex: 0 0 auto;
}
.footer__lockup strong {
  display: block;
  font-size: 18px;
  font-weight: 600;
  letter-spacing: .08em;
  line-height: 1;
  color: #fff;
  white-space: nowrap;
}
.footer__lockup small {
  display: block;
  margin-top: 7px;
  font-size: 7.4px;
  letter-spacing: .15em;
  color: rgba(255,255,255,.45);
  white-space: nowrap;
}
.footer__brand p {
  max-width: 320px;
  font-size: 13.5px;
  line-height: 1.9;
  color: rgba(255,255,255,.52);
}
.footer__col h4 {
  margin-bottom: 22px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .14em;
  color: #fff;
}
.footer__col ul { display: grid; gap: 12px; }
.footer__col a { font-size: 13.5px; transition: color .25s, padding-left .25s; }
.footer__col a:hover { color: var(--accent-soft); padding-left: 4px; }
.footer__contact { display: grid; gap: 16px; }
.footer__contact li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  font-size: 13.5px;
  line-height: 1.75;
}
.footer__contact svg {
  flex: 0 0 15px;
  width: 15px; height: 15px;
  margin-top: 5px;
  stroke: var(--accent);
  fill: none;
  stroke-width: 1.6;
}
.footer__bottom {
  border-top: 1px solid rgba(255,255,255,.10);
  padding: 24px 0;
}
.footer__bottom-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  font-size: 12.5px;
  letter-spacing: .03em;
  color: rgba(255,255,255,.42);
}
.footer__bottom a:hover { color: rgba(255,255,255,.8); }

/* ---------- 18. 内页头 ---------- */
.page-hero {
  position: relative;
  overflow: hidden;
  padding: 58px 0 54px;
  background: var(--bg-soft);
  border-bottom: 1px solid var(--line);
}
.page-hero__ghost {
  position: absolute;
  right: -6px; bottom: -40px;
  font-family: "Segoe UI", Arial, sans-serif;
  font-size: 130px;
  font-weight: 700;
  letter-spacing: .05em;
  line-height: 1;
  color: rgba(14,42,71,.045);
  white-space: nowrap;
  pointer-events: none;
  user-select: none;
}
.page-hero__title {
  position: relative;
  z-index: 2;
  margin-top: 14px;
  font-size: clamp(28px, 3.4vw, 40px);
  font-weight: 600;
  letter-spacing: .07em;
  color: var(--navy-900);
}
.breadcrumb {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 13px;
  color: var(--muted);
}
.breadcrumb a { transition: color .25s; }
.breadcrumb a:hover { color: var(--navy-700); }
.breadcrumb span { color: var(--line-strong); }

/* ---------- 19. 发展历程 ---------- */
.timeline {
  position: relative;
  margin-left: 6px;
  padding-left: 40px;
  border-left: 1px solid var(--line);
  display: grid;
  gap: 40px;
}
.timeline li { position: relative; }
.timeline li::before {
  content: "";
  position: absolute;
  left: -46px; top: 8px;
  width: 11px; height: 11px;
  background: #fff;
  border: 2px solid var(--accent);
  border-radius: 50%;
}
.timeline__year {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--navy-800);
}
.timeline__text {
  margin-top: 8px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text);
}

/* ---------- 20. 文化 / 编号卡片 ---------- */
.culture-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.culture-card {
  padding: 40px 34px;
  background: #fff;
  border: 1px solid var(--line);
  transition: transform .35s var(--ease), box-shadow .35s var(--ease);
}
.culture-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.culture-card__no {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .22em;
  color: var(--accent-text);
}
.culture-card h3 {
  margin-top: 18px;
  font-size: 20px;
  font-weight: 600;
  letter-spacing: .06em;
  color: var(--ink);
}
.culture-card p {
  margin-top: 14px;
  font-size: 14.5px;
  line-height: 1.9;
  color: var(--text);
}

/* ---------- 21. 业务详情分栏 ---------- */
.biz-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  padding: 64px 0;
  border-bottom: 1px solid var(--line);
}
.biz-detail:first-of-type { padding-top: 0; }
.biz-detail:last-of-type { border-bottom: 0; padding-bottom: 0; }
.biz-detail__media img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}
.biz-detail--reverse .biz-detail__media { order: 2; }
.biz-detail__no {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .22em;
  color: var(--accent-text);
}
.biz-detail h3 {
  margin-top: 16px;
  font-size: clamp(22px, 2.2vw, 28px);
  font-weight: 600;
  letter-spacing: .05em;
  color: var(--ink);
}
.biz-detail p {
  margin-top: 16px;
  font-size: 15px;
  line-height: 1.95;
  color: var(--text);
}
.biz-detail .checklist { margin-bottom: 0; }

/* ---------- 22. 服务流程 ---------- */
.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}
.step {
  padding: 0 30px;
  border-left: 1px solid var(--line);
}
.step:first-child { padding-left: 0; border-left: 0; }
.step:last-child { padding-right: 0; }
.step__num {
  display: block;
  margin-bottom: 16px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .2em;
  color: var(--accent-text);
}
.step h3 {
  font-size: 17px;
  font-weight: 600;
  letter-spacing: .04em;
  color: var(--ink);
}
.step p {
  margin-top: 10px;
  font-size: 14px;
  line-height: 1.85;
  color: var(--text);
}

/* ---------- 23. 联系页 ---------- */
.contact-cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.contact-card {
  padding: 34px 28px;
  background: #fff;
  border: 1px solid var(--line);
  text-align: center;
}
.contact-card svg {
  width: 30px; height: 30px;
  margin: 0 auto 18px;
  stroke: var(--navy-700);
  fill: none;
  stroke-width: 1.4;
}
.contact-card h3 {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .08em;
  color: var(--ink);
}
.contact-card p {
  margin-top: 10px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text);
}
.contact-card strong {
  font-size: 18px;
  font-weight: 600;
  color: var(--navy-800);
  letter-spacing: .02em;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}
.info-list { display: grid; }
.info-row {
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 18px;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}
.info-row:first-child { padding-top: 0; }
.info-row__icon {
  width: 40px; height: 40px;
  display: grid;
  place-items: center;
  background: var(--bg-soft);
  color: var(--navy-700);
}
.info-row__icon svg {
  width: 18px; height: 18px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.6;
}
.info-row h4 {
  font-size: 13px;
  font-weight: 500;
  letter-spacing: .1em;
  color: var(--muted);
}
.info-row p {
  margin-top: 6px;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--ink);
}
.info-row a:hover { color: var(--navy-700); }

.form {
  display: grid;
  gap: 18px;
}
.form__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}
.field label {
  display: block;
  margin-bottom: 8px;
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--muted);
}
.field label .req { color: var(--accent-text); }
.field input,
.field textarea,
.field select {
  width: 100%;
  padding: 13px 15px;
  font: inherit;
  font-size: 14.5px;
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  transition: border-color .25s, box-shadow .25s;
}
.field textarea { min-height: 132px; resize: vertical; }
.field input:focus,
.field textarea:focus,
.field select:focus {
  outline: none;
  border-color: var(--navy-600);
  box-shadow: 0 0 0 3px rgba(30,74,117,.08);
}
.form__note {
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--muted);
}
.form__success {
  display: none;
  padding: 12px 16px;
  font-size: 14px;
  color: #1D6B4A;
  background: #EAF5F0;
  border: 1px solid #C7E6D8;
}
.form__success.is-visible { display: block; }

.map-frame {
  position: relative;
  margin-top: 20px;
  border: 1px solid var(--line);
  overflow: hidden;
  background: var(--bg-soft);
}
.map-frame img { width: 100%; height: auto; object-fit: cover; }

/* ---------- 24. 动效 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity .85s var(--ease), transform .85s var(--ease);
  will-change: opacity, transform;
}
[data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 25. 返回顶部 ---------- */
.to-top {
  position: fixed;
  right: 26px; bottom: 26px;
  z-index: 55;
  display: grid;
  place-items: center;
  width: 46px; height: 46px;
  padding: 0;
  color: var(--navy-800);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all .35s var(--ease);
}
.to-top.is-visible { opacity: 1; visibility: visible; transform: none; }
.to-top:hover {
  background: var(--navy-800);
  border-color: var(--navy-800);
  color: #fff;
}
.to-top svg { width: 17px; height: 17px; }

/* ---------- 26. 响应式 ---------- */
@media (max-width: 1200px) {
  .footer__main { grid-template-columns: 1.4fr 1fr 1fr; }
  .footer__col--contact { grid-column: 1 / -1; }
  .news-layout { grid-template-columns: 1fr; gap: 48px; }
  .sidebar { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
  .sidebar__box + .sidebar__box { margin-top: 0; }
}

@media (max-width: 1080px) {
  .section { padding: 72px 0; }
  .topbar { display: none; }
  .header__inner { height: 70px; }
  .brand__mark { height: 36px; }
  .brand__text strong { font-size: 16px; letter-spacing: .06em; }
  .brand__text small { font-size: 6.8px; letter-spacing: .1em; }
  .nav-toggle { display: inline-block; }
  .nav {
    position: fixed;
    top: 0; right: 0; bottom: 0;
    z-index: 85;
    width: min(86vw, 360px);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 92px 28px 40px;
    background: #fff;
    box-shadow: -24px 0 60px rgba(11,31,53,.16);
    overflow-y: auto;
    /* 用 clip-path 代替 translateX 移出视口，避免产生横向溢出 */
    clip-path: inset(0 0 0 100%);
    visibility: hidden;
    pointer-events: none;
    transition: clip-path .42s var(--ease), visibility 0s linear .42s;
  }
  .nav.is-open {
    clip-path: inset(0 0 0 0);
    visibility: visible;
    pointer-events: auto;
    transition: clip-path .42s var(--ease), visibility 0s linear 0s;
  }
  .nav a {
    padding: 17px 2px;
    font-size: 16px;
    border-bottom: 1px solid var(--line);
  }
  .nav a::after { display: none; }
  .nav a.is-active { color: var(--navy-700); }
  .nav__cta {
    margin: 24px 0 0;
    padding: 14px 22px !important;
    text-align: center;
    border-bottom: 0;
  }

  .hero__inner { padding: 88px 0 132px; }
  .hero__scroll { display: none; }
  .stats { margin-top: -64px; }
  .stats__grid { grid-template-columns: repeat(2, 1fr); }
  .stat { padding: 28px 24px; }
  .stat:nth-child(odd) { border-left: 0; }
  .stat:nth-child(n+3) { border-top: 1px solid var(--line); }

  .split { grid-template-columns: 1fr; gap: 44px; }
  .split__media { order: -1; }
  .split__media::before { width: 72px; height: 72px; left: -10px; top: -10px; }
  .split__media::after { width: 72px; height: 72px; right: -10px; bottom: -10px; }

  .band { padding: 56px 0; }
  .band__grid { grid-template-columns: repeat(2, 1fr); gap: 34px 0; }
  .band__item:nth-child(3) { padding-left: 0; border-left: 0; }
  .band__item:nth-child(odd) { padding-left: 0; border-left: 0; }
  .band__item:nth-child(even) { padding-right: 0; }

  .biz-grid,
  .project-grid,
  .news-grid { grid-template-columns: repeat(2, 1fr); }
  .cert-grid { grid-template-columns: repeat(3, 1fr); }

  .culture-grid { grid-template-columns: 1fr; }

  .biz-detail { grid-template-columns: 1fr; gap: 36px; padding: 48px 0; }
  .biz-detail--reverse .biz-detail__media { order: 0; }

  .steps { grid-template-columns: repeat(2, 1fr); gap: 34px 0; }
  .step:nth-child(3) { padding-left: 0; border-left: 0; }
  .step:last-child { padding-right: 0; }

  .contact-cards { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; gap: 48px; }

  .cta__inner { flex-direction: column; align-items: flex-start; padding: 56px 0; }

  .page-hero__ghost { font-size: 88px; bottom: -20px; }
  .footer__main { grid-template-columns: 1fr 1fr; gap: 40px 32px; padding: 56px 0 44px; }
  .footer__brand { grid-column: 1 / -1; }
  .footer__col--contact { grid-column: 1 / -1; }
}

@media (max-width: 640px) {
  .container,
  .container--narrow { width: calc(100% - 36px); }
  .section { padding: 56px 0; }
  .section--tight { padding: 48px 0; }

  .brand__mark { height: 32px; }
  .brand__text strong { font-size: 15px; letter-spacing: .05em; }
  .brand__text small { display: none; }
  .header__inner { height: 64px; }

  .hero { min-height: 500px; }
  .hero__inner { padding: 72px 0 116px; }
  .hero__title { font-size: 32px; }
  .hero__desc { font-size: 15px; }
  .hero__actions .btn { flex: 1 1 auto; }

  .stats { margin-top: -52px; }
  .stat { padding: 24px 18px; }
  .stat__num { font-size: 28px; }
  .stat__label { font-size: 12px; }

  .sec-head { margin-bottom: 40px; }
  .sec-desc { font-size: 14.5px; }

  .biz-grid,
  .project-grid,
  .news-grid { grid-template-columns: 1fr; }
  .cert-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-cards { grid-template-columns: 1fr; }

  .biz-card,
  .culture-card { padding: 32px 26px; }

  .news-item { grid-template-columns: 72px 1fr; gap: 20px; padding: 24px 0; }
  .news-item__arrow { display: none; }
  .news-item__date { padding-right: 18px; }
  .news-item__day { font-size: 24px; }

  .honor-list { grid-template-columns: 1fr; }

  .steps { grid-template-columns: 1fr; }
  .step { padding: 0; border-left: 0; }
  .step__num { margin-bottom: 10px; }

  .form__row { grid-template-columns: 1fr; }

  .sidebar { grid-template-columns: 1fr; }

  .footer__main { grid-template-columns: 1fr; }
  .footer__lockup img { height: 38px; }
  .footer__lockup strong { font-size: 17px; }
  .footer__bottom-inner { flex-direction: column; align-items: flex-start; gap: 10px; }

  .to-top { right: 16px; bottom: 16px; width: 42px; height: 42px; }

  .page-hero { padding: 40px 0 36px; }
  .page-hero__ghost { display: none; }
}

/* ---------- 27. 可访问性偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  [data-reveal] { opacity: 1; transform: none; }
}