/* ============ 设计系统 · 稳健科技风 ============ */
:root {
  --primary: #0B1F3A;      /* 深蓝 / 藏青 */
  --secondary: #1E4E8C;    /* 钢蓝 */
  --accent: #00B4D8;       /* 科技青 */
  --accent-deep: #0096C7;
  --bg: #FFFFFF;
  --bg-soft: #F5F7FA;
  --text: #1A1A1A;
  --muted: #5A5A5A;
  --line: #E4E9F0;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 2px 12px rgba(11, 31, 58, .06);
  --shadow-hover: 0 10px 30px rgba(11, 31, 58, .12);
  --maxw: 1200px;
  --font: "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.muted { color: var(--muted); }

/* 排版细节：标题、段落、列表的呼吸感 */
h1, h2, h3, h4 { color: var(--primary); line-height: 1.3; letter-spacing: .3px; }
p { word-break: break-word; }

/* ============ 按钮 ============ */
.btn {
  display: inline-block;
  padding: 13px 28px;
  border-radius: var(--radius-sm);
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  border: 1.5px solid transparent;
  transition: all .25s ease;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--secondary); transform: translateY(-2px); box-shadow: var(--shadow-hover); }
.btn-ghost { background: transparent; color: #fff; border-color: rgba(255,255,255,.5); }
.btn-ghost:hover { background: rgba(255,255,255,.12); border-color: #fff; }

/* ============ 顶部导航 ============ */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.88);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: all .3s ease;
}
.site-header.scrolled { border-color: var(--line); box-shadow: var(--shadow); }
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.brand { display: flex; align-items: flex-end; gap: 12px; font-weight: 700; font-size: 18px; color: var(--primary); line-height: 1.2; }
.brand-logo { height: 42px; width: auto; display: block; }
.brand-text { white-space: nowrap; }
.nav { display: flex; gap: 26px; }
.nav a { font-size: 15px; color: var(--text); font-weight: 500; transition: color .2s; }
.nav a:hover { color: var(--accent-deep); }
.nav a.active { color: var(--accent-deep); font-weight: 700; }
.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: 0; cursor: pointer; padding: 6px; }
.nav-toggle span { width: 24px; height: 2px; background: var(--primary); border-radius: 2px; transition: .3s; }

/* ============ Hero ============ */
.hero { position: relative; overflow: hidden; color: #fff; background: var(--primary); }
.hero-bg {
  position: absolute; inset: 0;
  background: url('generated-images/hero-bg.png') center/cover no-repeat;
}
.hero-bg::before {
  content: ""; position: absolute; inset: 0;
  background:
    linear-gradient(120deg, rgba(11,31,58,.96) 0%, rgba(11,31,58,.88) 40%, rgba(11,31,58,.68) 100%),
    rgba(11,31,58, .35);
}
.hero-bg::after {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.05) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(circle at 70% 30%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(circle at 70% 30%, #000 30%, transparent 75%);
  opacity: .6;
}
.hero-content { position: relative; padding: 130px 24px 100px; max-width: 920px; }
.hero-eyebrow { font-size: 14px; letter-spacing: 2px; color: var(--accent); font-weight: 600; margin-bottom: 18px; }
.hero-title { font-size: clamp(40px, 6vw, 64px); line-height: 1.18; font-weight: 800; letter-spacing: 1px; color: #fff; }
.hero-sub { margin: 24px 0 36px; font-size: 18px; color: rgba(255,255,255,.86); max-width: 700px; line-height: 1.85; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-stats {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px;
  margin-top: 72px; padding-top: 40px; border-top: 1px solid rgba(255,255,255,.15);
}
.stat-num { display: block; font-size: 38px; font-weight: 800; color: #fff; font-variant-numeric: tabular-nums; }
.stat-label { font-size: 14px; color: rgba(255,255,255,.7); }

/* ============ 通用 Section ============ */
.section { padding: 104px 0; }
.section-soft { background: var(--bg-soft); }
.section-head { text-align: center; max-width: 760px; margin: 0 auto 60px; }
.section-kicker { font-size: 13px; letter-spacing: 3px; color: var(--accent-deep); font-weight: 700; margin-bottom: 14px; }
.section-title { font-size: clamp(28px, 4vw, 40px); font-weight: 800; color: var(--primary); }
.section-desc { margin-top: 16px; color: var(--muted); font-size: 17px; line-height: 1.85; }

/* ===== 子页头部 ===== */
.page-hero {
  background:
    linear-gradient(rgba(11,31,58,.92), rgba(11,31,58,.92)),
    url('generated-images/banner.png') center/cover no-repeat;
  color: #fff; padding: 76px 0 64px;
}
.page-kicker { font-size: 13px; letter-spacing: 3px; color: var(--accent); font-weight: 700; margin-bottom: 12px; }
.page-title { font-size: clamp(30px, 5vw, 44px); font-weight: 800; color: #fff; }
.page-desc { margin-top: 14px; font-size: 16px; color: rgba(255,255,255,.8); max-width: 720px; }

/* ============ 首页优势（强化版） ============ */
.advantage-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.adv-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 34px 26px; box-shadow: var(--shadow); transition: transform .25s, box-shadow .25s, border-color .25s;
  position: relative; overflow: hidden;
}
.adv-card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-deep));
  transform: scaleX(0); transform-origin: left; transition: transform .35s ease;
}
.adv-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-hover); border-color: var(--accent); }
.adv-card:hover::before { transform: scaleX(1); }
.adv-no { font-size: 30px; font-weight: 800; color: var(--accent); opacity: .65; display: block; margin-bottom: 6px; }
.adv-card h3 { font-size: 21px; color: var(--primary); margin: 8px 0 14px; font-weight: 700; }
.adv-card p { font-size: 15px; color: var(--muted); line-height: 1.85; }
.adv-highlight { color: var(--primary); font-weight: 600; }

/* ============ 关于我们 ============ */
.about-intro { max-width: 880px; margin: 0 auto 60px; font-size: 18px; text-align: center; line-height: 2; color: #2a2a2a; }
.backing { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin-top: 48px; }
.backing-item {
  background: linear-gradient(135deg, #0B1F3A, #16335c);
  color: #fff; border-radius: var(--radius); padding: 36px;
}
.backing-tag { display: inline-block; font-size: 12px; letter-spacing: 1px; color: var(--accent); border: 1px solid rgba(0,180,216,.5); border-radius: 999px; padding: 4px 14px; margin-bottom: 16px; }
.backing-item h4 { font-size: 23px; color: #fff; margin-bottom: 12px; }
.backing-item p { font-size: 15px; color: rgba(255,255,255,.82); line-height: 1.85; }
.backing-item .rank { color: var(--accent); font-weight: 700; }

/* ============ 投资理念 ============ */
.track-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.track-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 36px 26px; text-align: center; transition: transform .25s, box-shadow .25s, border-color .25s; }
.track-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); border-color: var(--accent); }
.track-icon { font-size: 40px; margin-bottom: 16px; }
.track-card h3 { font-size: 20px; color: var(--primary); margin-bottom: 12px; }
.track-card p { font-size: 14.5px; color: var(--muted); line-height: 1.85; }
.philo-extra { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin-top: 32px; }
.stage-box, .exit-box { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 32px; }
.stage-box h4, .exit-box h4 { color: var(--primary); font-size: 19px; margin-bottom: 18px; font-weight: 700; }
.stage-bar { display: flex; flex-wrap: wrap; gap: 10px; }
.stage-bar span { background: var(--bg-soft); border: 1px solid var(--line); border-radius: 999px; padding: 8px 18px; font-size: 14px; color: var(--secondary); font-weight: 600; }
.stage-bar span.active-stage { background: var(--primary); color: #fff; border-color: var(--primary); }
.stage-bar span.muted-stage { opacity: .35; }
.stage-note { margin-top: 14px; font-size: 13.5px; color: var(--muted); }

/* ============ 产业赋能（深色） ============ */
.section-dark {
  background: linear-gradient(160deg, rgba(11,31,58,.94), rgba(13,39,72,.94)), url('generated-images/empower-bg.png') center/cover no-repeat;
  color: #fff; position: relative; overflow: hidden;
}
.section-dark::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px);
  background-size: 50px 50px;
  mask-image: radial-gradient(circle at 50% 0%, #000 10%, transparent 70%);
  -webkit-mask-image: radial-gradient(circle at 50% 0%, #000 10%, transparent 70%);
}
.section-head.light .section-title, .section-dark .section-title { color: #fff; }
.section-head.light .section-desc, .light-muted { color: rgba(255,255,255,.78); }

.capability-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; position: relative; }
.cap-card { background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.12); border-radius: var(--radius); padding: 30px 24px; transition: border-color .25s, background .25s, transform .25s; }
.cap-card:hover { border-color: var(--accent); background: rgba(0,180,216,.1); transform: translateY(-4px); }
.cap-card h3 { font-size: 19px; color: #fff; margin-bottom: 12px; font-weight: 700; }
.cap-card p { font-size: 14.5px; color: rgba(255,255,255,.82); line-height: 1.85; }
.cap-card .cap-meta { display: inline-block; margin-top: 12px; font-size: 12.5px; color: var(--accent); font-weight: 600; letter-spacing: .5px; }

.empower-block { margin-top: 56px; position: relative; }
.empower-block-title { color: #fff; font-size: 22px; font-weight: 700; margin-bottom: 22px; display: flex; align-items: center; gap: 10px; }
.empower-block-title::before { content: ""; width: 4px; height: 22px; background: var(--accent); border-radius: 2px; }
.empower-block p { color: rgba(255,255,255,.82); font-size: 15.5px; line-height: 1.95; margin-bottom: 14px; }

/* 软件赋能双栏 */
.soft-empower { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.soft-item { background: rgba(255,255,255,.05); border: 1px solid rgba(255,255,255,.1); border-radius: var(--radius-sm); padding: 20px 22px; }
.soft-item h5 { color: var(--accent); font-size: 15px; font-weight: 700; margin-bottom: 8px; }
.soft-item p { color: rgba(255,255,255,.78); font-size: 14px; line-height: 1.85; margin: 0; }

/* NPI 图 */
.npi-figure { background: #fff; border-radius: var(--radius); padding: 28px; margin-top: 24px; }
.npi-figure img { width: 100%; height: auto; border-radius: var(--radius-sm); }
.npi-figure p { color: var(--muted); font-size: 13.5px; margin-top: 12px; text-align: center; }

/* 全寿命全费用 4 列 */
.lifecycle-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: 22px; }
.lifecycle-item { background: rgba(255,255,255,.05); border: 1px solid rgba(255,255,255,.12); border-radius: var(--radius-sm); padding: 22px 20px; }
.lifecycle-item h5 { color: var(--accent); font-size: 15px; font-weight: 700; margin-bottom: 10px; }
.lifecycle-item p { color: rgba(255,255,255,.78); font-size: 14px; line-height: 1.85; margin: 0; }

/* 证书 */
.certs-area { display: flex; justify-content: center; margin-top: 28px; }
.certs-img { background: #fff; border-radius: var(--radius); padding: 24px; max-width: 880px; width: 100%; }
.certs-img img { width: 100%; height: auto; border-radius: var(--radius-sm); display: block; }
.certs-note { color: rgba(255,255,255,.72); font-size: 14px; line-height: 1.85; margin-top: 18px; text-align: center; max-width: 820px; margin-left: auto; margin-right: auto; }

/* ============ 新闻动态 ============ */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.news-card { background: var(--bg-soft); border: 1px solid var(--line); border-radius: var(--radius); padding: 30px; transition: transform .25s, box-shadow .25s; cursor: pointer; }
.news-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
.news-card.opened { background: #fff; border-color: var(--accent); }
.news-date { font-size: 12.5px; color: var(--accent-deep); font-weight: 700; letter-spacing: 1px; display: inline-block; padding: 3px 10px; background: rgba(0,180,216,.12); border-radius: 999px; }
.news-track { display: inline-block; margin-left: 8px; font-size: 12.5px; color: var(--secondary); font-weight: 600; }
.news-card h3 { font-size: 19px; color: var(--primary); margin: 14px 0 12px; line-height: 1.45; }
.news-card .summary { font-size: 14.5px; color: var(--muted); line-height: 1.85; }
.news-card .detail { display: none; margin-top: 16px; padding-top: 16px; border-top: 1px dashed var(--line); color: #2a2a2a; font-size: 14.5px; line-height: 1.95; }
.news-card.opened .detail { display: block; }
.news-card .toggle { display: inline-block; margin-top: 14px; font-size: 13px; color: var(--accent-deep); font-weight: 600; }
.news-card .detail p { margin-bottom: 12px; }
.news-card .detail h4 { font-size: 15.5px; margin: 18px 0 8px; color: var(--primary); }

/* ============ 联系我们 ============ */
.contact-wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: start; }
.contact-info { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 36px; box-shadow: var(--shadow); }
.contact-info h4 { color: var(--primary); margin: 20px 0 10px; font-size: 16px; font-weight: 700; }
.contact-info h4:first-child { margin-top: 0; }
.contact-info p { color: #2a2a2a; font-size: 15.5px; line-height: 1.85; }
.contact-info .item-block { padding-bottom: 16px; border-bottom: 1px solid var(--line); margin-bottom: 16px; }
.contact-info .item-block:last-child { border-bottom: 0; padding-bottom: 0; margin-bottom: 0; }
.contact-info .copy-btn { display: inline-block; margin-left: 10px; padding: 3px 10px; font-size: 12px; color: var(--accent-deep); border: 1px solid var(--accent); border-radius: 999px; cursor: pointer; background: transparent; font-family: inherit; }
.contact-info .copy-btn:hover { background: var(--accent); color: #fff; }

.location-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow); }
.location-card img { width: 100%; height: auto; border-radius: var(--radius-sm); }
.location-card p { color: var(--muted); font-size: 13.5px; margin-top: 12px; line-height: 1.85; text-align: center; }

.office-gallery { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 36px; }
.office-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); transition: transform .25s, box-shadow .25s; }
.office-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.office-card img { width: 100%; height: 220px; object-fit: cover; }
.office-card .cap { padding: 14px 18px; font-size: 13.5px; color: var(--muted); text-align: center; }

/* ============ 页脚 ============ */
.site-footer { background: var(--primary); color: rgba(255,255,255,.85); padding: 56px 0 28px; }
.footer-inner { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 24px; }
.footer-brand { display: flex; align-items: center; gap: 12px; font-weight: 600; }
.footer-nav { display: flex; gap: 24px; flex-wrap: wrap; }
.footer-nav a { font-size: 14px; color: rgba(255,255,255,.78); transition: color .2s; }
.footer-nav a:hover { color: var(--accent); }
.footer-bottom { margin-top: 32px; padding-top: 22px; border-top: 1px solid rgba(255,255,255,.12); font-size: 13px; }
.footer-bottom p { color: rgba(255,255,255,.6); line-height: 1.8; }

/* ============ 滚动渐显 ============ */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ============ 响应式（手机端适配） ============ */
@media (max-width: 980px) {
  .advantage-grid, .track-grid, .capability-grid { grid-template-columns: repeat(2, 1fr); }
  .lifecycle-grid { grid-template-columns: repeat(2, 1fr); }
  .soft-empower { grid-template-columns: 1fr; }
  .backing, .philo-extra, .contact-wrap { grid-template-columns: 1fr; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); gap: 28px; }
  .news-grid { grid-template-columns: repeat(2, 1fr); }
  .office-gallery { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 720px) {
  .nav { position: fixed; top: 72px; left: 0; right: 0; background: #fff; flex-direction: column; gap: 0; padding: 6px 24px 12px; border-bottom: 1px solid var(--line); box-shadow: var(--shadow); transform: translateY(-120%); transition: transform .3s ease; max-height: calc(100vh - 72px); overflow-y: auto; }
  .nav.open { transform: none; }
  .nav a { padding: 14px 0; border-bottom: 1px solid var(--line); font-size: 16px; }
  .nav a:last-child { border-bottom: 0; }
  .nav-toggle { display: flex; }
  .section { padding: 70px 0; }
  .page-hero { padding: 52px 0 44px; }
  .advantage-grid, .track-grid, .capability-grid, .lifecycle-grid, .news-grid, .office-gallery { grid-template-columns: 1fr; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .hero-content { padding: 90px 24px 70px; }
  .footer-inner { flex-direction: column; align-items: flex-start; gap: 16px; }
  .footer-nav { gap: 14px 18px; }
  .brand-text { font-size: 16px; }
  .brand-logo { height: 32px; }
  .contact-info, .location-card { padding: 24px; }
  .backing-item, .stage-box, .exit-box { padding: 24px; }
}
@media (max-width: 420px) {
  .hero-stats { grid-template-columns: 1fr 1fr; }
  .container { padding: 0 18px; }
}