/* ============================================
   奥飞新能源 - 企业官网样式
   主色：深林绿 #1a4d3a / #1e5c48
   辅色：翠绿 #2d8a5e / 金色 #c9a961
   ============================================ */

:root {
  --green-900: #0f3d2e;
  --green-800: #1a4d3a;
  --green-700: #1e5c48;
  --green-600: #24705a;
  --green-500: #2d8a5e;
  --green-400: #4aa87e;
  --green-100: #e6f1ec;
  --green-50:  #f4f9f6;
  --gold:      #c9a961;
  --gold-light:#e3cf9a;
  --ink:       #1f2d28;
  --ink-2:     #4a5a53;
  --line:      #e2e8e5;
  --white:     #ffffff;
  --shadow:    0 10px 30px rgba(15, 61, 46, .10);
  --shadow-lg: 0 20px 50px rgba(15, 61, 46, .18);
  --radius:    14px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: var(--white);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }

.container { max-width: 1240px; margin: 0 auto; padding: 0 32px; }

/* ---------- 导航 ---------- */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  padding: 14px 0;
  transition: all .3s ease;
  background: transparent;
}
.navbar.scrolled {
  background: rgba(15, 61, 46, .96);
  backdrop-filter: blur(10px);
  box-shadow: 0 2px 20px rgba(0,0,0,.15);
  padding: 8px 0;
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; }
.brand-logo { height: 44px; width: auto; background: rgba(255,255,255,.92); padding: 6px 14px; border-radius: 8px; }
.nav-links { display: flex; gap: 36px; }
.nav-links a {
  color: #fff; font-size: 15px; font-weight: 500;
  position: relative; padding: 6px 0;
  transition: color .2s;
}
.nav-links a::after {
  content: ""; position: absolute; left: 0; bottom: 0;
  width: 0; height: 2px; background: var(--gold);
  transition: width .3s;
}
.nav-links a:hover { color: var(--gold-light); }
.nav-links a:hover::after { width: 100%; }
.nav-toggle { display: none; background: none; border: 0; cursor: pointer; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: #fff; margin: 5px 0; }

/* ---------- Hero ---------- */
.hero {
  min-height: 100vh;
  background-size: cover;
  background-position: center;
  color: #fff;
  display: flex; align-items: center;
  position: relative;
}
.hero-inner { position: relative; z-index: 2; padding-top: 60px; }
.hero-eyebrow {
  letter-spacing: 4px; font-size: 13px;
  color: var(--gold-light); margin-bottom: 24px;
}
.hero h1 {
  font-size: clamp(40px, 6vw, 76px);
  font-weight: 800; line-height: 1.15;
  margin-bottom: 20px;
}
.hero h1 .accent { color: var(--gold-light); }
.hero-sub {
  font-size: clamp(16px, 2vw, 22px);
  color: rgba(255,255,255,.85);
  letter-spacing: 2px; margin-bottom: 40px;
  font-family: Georgia, serif;
}
.hero-badges { display: flex; gap: 20px; margin-bottom: 44px; flex-wrap: wrap; }
.badge {
  display: flex; align-items: center; gap: 8px;
  border: 1px solid rgba(255,255,255,.4);
  padding: 10px 20px; border-radius: 999px;
  font-size: 14px; backdrop-filter: blur(4px);
}
.btn-primary {
  display: inline-block;
  background: var(--gold); color: #fff;
  padding: 14px 36px; border-radius: 999px;
  font-weight: 600; letter-spacing: 1px;
  transition: all .3s;
  box-shadow: 0 8px 24px rgba(201,169,97,.4);
}
.btn-primary:hover { background: #b8964f; transform: translateY(-2px); }
.hero-bottom-bar {
  position: absolute; bottom: 0; left: 0; right: 0;
  background: rgba(255,255,255,.96);
  color: var(--green-700);
  padding: 14px 0; text-align: center;
  letter-spacing: 6px; font-size: 14px; font-weight: 500;
  clip-path: polygon(0 0, 96% 0, 100% 100%, 0 100%);
}

/* ---------- 目录 ---------- */
.toc-section { padding: 90px 0; background: var(--green-50); }
.section-head { text-align: center; margin-bottom: 50px; }
.section-head h2 {
  font-size: clamp(28px, 3.5vw, 42px);
  color: var(--green-800); font-weight: 800;
  margin-bottom: 12px;
}
.section-head .section-desc { color: var(--ink-2); font-size: 16px; }
.section-head.light h2 { color: #fff; }
.section-tag {
  display: inline-block;
  font-size: 13px; letter-spacing: 4px;
  color: var(--gold); margin-bottom: 10px;
}

.toc-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.toc-card {
  background: #fff; border-radius: var(--radius);
  padding: 40px 32px; box-shadow: var(--shadow);
  border-top: 4px solid var(--green-500);
  transition: all .3s;
}
.toc-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.toc-num {
  font-size: 48px; font-weight: 800; color: var(--green-100);
  line-height: 1; display: block; margin-bottom: 16px;
}
.toc-card h3 { font-size: 22px; color: var(--green-800); margin-bottom: 10px; }
.toc-card p { color: var(--ink-2); font-size: 14px; }

/* ---------- Section 通用 ---------- */
.section { padding: 100px 0; }
.section.gray { background: var(--green-50); }

/* ---------- 关于 ---------- */
#about {
  background: linear-gradient(135deg, var(--green-800) 0%, var(--green-700) 100%);
  color: #fff;
}
#about .section-head h2 { color: #fff; }
.about-wrap {
  display: grid; grid-template-columns: 1.2fr 1fr; gap: 50px;
  align-items: center; margin-bottom: 60px;
}
.about-text p { font-size: 16px; color: rgba(255,255,255,.9); margin-bottom: 16px; }
.about-text .lead { font-size: 18px; color: #fff; }
.about-text strong { color: var(--gold-light); }
.about-highlight {
  margin-top: 24px; display: inline-flex; align-items: center; gap: 16px;
  background: rgba(255,255,255,.12);
  padding: 16px 28px; border-radius: 12px;
  font-size: 20px; font-weight: 700; letter-spacing: 2px;
}
.about-highlight em { color: var(--gold); font-style: normal; }
.about-img img {
  border-radius: var(--radius); box-shadow: var(--shadow-lg);
  width: 100%; height: 360px; object-fit: cover;
}

.stats-row {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
  background: rgba(255,255,255,.08);
  border-radius: var(--radius); padding: 36px 20px;
}
.stat { text-align: center; }
.stat-num {
  font-size: 42px; font-weight: 800; color: var(--gold-light);
  font-family: Georgia, serif; line-height: 1;
}
.stat-num small { font-size: 20px; }
.stat-label { margin-top: 8px; color: rgba(255,255,255,.8); font-size: 14px; }
.data-note { text-align: right; font-size: 12px; color: rgba(255,255,255,.5); margin-top: 14px; }

/* ---------- Timeline ---------- */
.timeline-section {
  background:
    linear-gradient(135deg, rgba(15,61,46,.96), rgba(30,92,72,.92)),
    url('images/hero-bg.jpg');
  background-size: cover; background-position: center;
  padding: 100px 0; color: #fff;
}
.timeline {
  position: relative;
  display: grid; grid-template-columns: repeat(6, 1fr); gap: 20px;
  margin-top: 40px;
}
.timeline::before {
  content: ""; position: absolute; left: 0; right: 0; top: 18px;
  border-top: 3px dashed var(--gold);
}
.tl-item { position: relative; padding-top: 50px; }
.tl-dot {
  position: absolute; top: 10px; left: 0;
  width: 18px; height: 18px; border-radius: 50%;
  background: var(--gold); border: 3px solid var(--green-800);
  box-shadow: 0 0 0 3px var(--gold);
}
.tl-year { font-size: 22px; font-weight: 800; color: var(--gold-light); margin-bottom: 8px; }
.tl-item h4 { font-size: 15px; margin-bottom: 10px; color: #fff; }
.tl-item ul li {
  font-size: 12.5px; color: rgba(255,255,255,.8);
  margin-bottom: 6px; padding-left: 14px; position: relative;
}
.tl-item ul li::before {
  content: ""; position: absolute; left: 0; top: 9px;
  width: 5px; height: 5px; background: var(--gold); border-radius: 50%;
}

/* ---------- Honors ---------- */
.honors { background: var(--green-50); }
.honor-row {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px;
  margin-bottom: 70px;
}
.honor-card {
  background: #fff; border-radius: var(--radius);
  padding: 28px; text-align: center; box-shadow: var(--shadow);
  transition: transform .3s;
}
.honor-card:hover { transform: translateY(-6px); }
.honor-tag {
  display: inline-block; background: var(--green-700); color: #fff;
  padding: 6px 18px; border-radius: 999px; font-size: 13px;
  margin-bottom: 18px;
}
.honor-card img {
  height: 160px; object-fit: contain; margin: 0 auto 16px;
  border-radius: 8px;
}
.honor-card h4 { color: var(--green-800); font-size: 16px; }

.ip-grid {
  background: linear-gradient(135deg, var(--green-800), var(--green-700));
  border-radius: var(--radius); padding: 50px; color: #fff;
  display: grid; grid-template-columns: 1fr 1.1fr; gap: 40px;
  align-items: start;
}
.ip-text h3 { font-size: 22px; margin-bottom: 20px; }
.ip-text h3.mt { margin-top: 30px; }
.ip-stats { display: flex; gap: 50px; flex-wrap: wrap; }
.ip-stats strong {
  font-size: 48px; font-weight: 800; color: var(--gold-light);
  font-family: Georgia, serif; display: block; line-height: 1;
}
.ip-stats strong small { font-size: 20px; margin-left: 4px; }
.ip-stats span { color: rgba(255,255,255,.8); font-size: 14px; }
.std-cards { display: grid; grid-template-columns: 1fr; gap: 16px; margin-top: 20px; }
.std-card {
  background: rgba(255,255,255,.1); border-left: 3px solid var(--gold);
  padding: 16px 20px; border-radius: 0 8px 8px 0; font-size: 14px;
}

/* 证书墙 */
.cert-wall {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}
.cert-wall img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: contain;
  background: #fff;
  border-radius: 6px;
  border: 1px solid rgba(255,255,255,.2);
  padding: 6px;
  transition: transform .3s, box-shadow .3s;
  cursor: pointer;
}
.cert-wall img:hover {
  transform: scale(1.05); z-index: 2;
  box-shadow: 0 8px 24px rgba(0,0,0,.4);
}

/* ---------- Business ---------- */
.business {
  background: linear-gradient(135deg, var(--green-800) 0%, var(--green-700) 100%);
  color: #fff;
}
.block-title {
  font-size: 26px; color: var(--green-800); margin: 40px 0 28px;
  padding-left: 14px; border-left: 4px solid var(--gold);
}
.block-title.center { text-align: center; border: 0; padding: 0; }
.business .block-title,
.solution .block-title { color: #fff; }

.coverage-wrap {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
  background: rgba(255,255,255,.08);
  border-radius: var(--radius); padding: 36px 30px;
}
.cov-item {
  background: rgba(255,255,255,.1); padding: 28px 18px; border-radius: 12px;
  text-align: center;
  border: 1px solid rgba(255,255,255,.08);
}
.cov-item strong { font-size: 44px; color: var(--gold-light); font-family: Georgia, serif; display: block; line-height: 1; }
.cov-item small { font-size: 20px; }
.cov-item span { display: block; font-size: 14px; color: rgba(255,255,255,.8); margin-top: 10px; }

.env-row {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px;
  margin-top: 24px;
}
.env-row > div {
  background: var(--green-900); border-radius: 10px; padding: 20px;
  text-align: center;
}
.env-row strong { font-size: 26px; color: var(--gold-light); font-family: Georgia, serif; }
.env-row small { font-size: 14px; }
.env-row span { display: block; font-size: 13px; color: rgba(255,255,255,.75); margin-top: 4px; }

/* Core competitiveness */
.core-cards {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px;
}
.core-card {
  background: #fff; color: var(--ink);
  border-radius: var(--radius); padding: 24px;
  box-shadow: var(--shadow);
}
.core-num {
  display: inline-block; background: var(--green-700); color: #fff;
  padding: 4px 12px; border-radius: 6px; font-size: 13px;
  margin-bottom: 12px;
}
.core-card h4 { color: var(--green-800); font-size: 16px; margin-bottom: 12px; }
.core-card ul li {
  font-size: 12.5px; color: var(--ink-2); margin-bottom: 8px;
  padding-left: 12px; position: relative;
}
.core-card ul li::before {
  content: "▪"; position: absolute; left: 0; color: var(--green-500);
}
.core-card img {
  margin-top: 14px; height: 110px; width: 100%; object-fit: cover;
  border-radius: 8px;
}

/* ---------- Cases ---------- */
.cases { background: var(--green-50); }
.case-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
  margin-bottom: 20px;
}
.case-card {
  background: #fff; border-radius: var(--radius); overflow: hidden;
  box-shadow: var(--shadow); transition: transform .3s;
}
.case-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.case-card img {
  height: 200px; width: 100%; object-fit: cover;
}
.case-card.wide { grid-column: span 1; }
.case-grid-2col { grid-template-columns: repeat(2, 1fr); }
.case-body { padding: 20px; }
.case-body h4 { color: var(--green-800); font-size: 16px; margin-bottom: 14px; }
.case-body h4 small { color: var(--ink-2); font-weight: normal; }
.case-metrics {
  display: grid; grid-template-columns: 1fr 1fr; gap: 10px;
  background: var(--green-50); padding: 12px; border-radius: 8px;
}
.case-metrics div span { display: block; font-size: 11px; color: var(--ink-2); }
.case-metrics div strong { font-size: 16px; color: var(--green-700); font-family: Georgia, serif; }
.dot-list li {
  font-size: 14px; color: var(--ink-2); margin-bottom: 6px;
  padding-left: 16px; position: relative;
}
.dot-list li::before {
  content: "▪"; position: absolute; left: 0; color: var(--green-500);
}
.dot-list.light li { color: rgba(255,255,255,.9); }
.dot-list.light li::before { color: var(--gold); }

/* ---------- Green power banner ---------- */
.green-power {
  background-size: cover; background-position: center;
  padding: 110px 0; color: #fff;
}
.gp-wrap { display: flex; justify-content: flex-end; }
.gp-text {
  max-width: 620px;
  background: rgba(15,61,46,.55);
  backdrop-filter: blur(8px);
  padding: 40px; border-radius: var(--radius);
  border-left: 4px solid var(--gold);
}
.gp-text h2 { font-size: 32px; margin-bottom: 16px; }
.gp-text p { margin-bottom: 16px; color: rgba(255,255,255,.9); }

/* ---------- Storage ---------- */
.storage { background: #fff; }
.storage-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}
.storage-card {
  background: var(--green-50); border-radius: var(--radius);
  padding: 28px;
}
.storage-card h4 { color: var(--green-800); font-size: 17px; margin-bottom: 6px; }
.storage-sub { color: var(--gold); font-size: 13px; margin-bottom: 16px; }
.feat-row { display: flex; flex-direction: column; gap: 10px; margin-bottom: 16px; }
.feat {
  background: #fff; padding: 12px 14px; border-radius: 8px;
  border-left: 3px solid var(--green-500);
}
.feat strong { display: block; color: var(--green-700); font-size: 14px; margin-bottom: 2px; }
.feat span { font-size: 12.5px; color: var(--ink-2); }
.storage-card img { border-radius: 8px; margin-top: 8px; height: 140px; object-fit: cover; width: 100%; }

/* ---------- Solution ---------- */
.solution {
  background: linear-gradient(135deg, var(--green-800), var(--green-700));
  color: #fff;
}
.sol-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 26px;
}
.sol-card {
  background: rgba(255,255,255,.08);
  border-radius: var(--radius); padding: 30px;
  border: 1px solid rgba(255,255,255,.12);
  transition: all .3s;
}
.sol-card:hover { background: rgba(255,255,255,.12); transform: translateY(-4px); }
.sol-icon { font-size: 36px; margin-bottom: 12px; }
.sol-card h3 { font-size: 20px; margin-bottom: 12px; color: var(--gold-light); }
.sol-card p { font-size: 14px; color: rgba(255,255,255,.85); margin-bottom: 16px; }
.sol-points { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 16px; }
.sol-points span {
  background: rgba(201,169,97,.2); color: var(--gold-light);
  padding: 4px 12px; border-radius: 999px; font-size: 12px;
}
.sol-card img { border-radius: 8px; height: 180px; width: 100%; object-fit: cover; }

/* ---------- Closing ---------- */
.closing {
  background-size: cover; background-position: center;
  padding: 120px 0 80px; color: #fff; text-align: center;
  position: relative;
}
.closing-inner h2 {
  font-size: clamp(32px, 4.5vw, 56px);
  font-weight: 800; line-height: 1.3; margin-bottom: 20px;
}
.closing-en {
  font-family: Georgia, serif; font-size: 20px;
  color: rgba(255,255,255,.85); letter-spacing: 1px;
}

/* ---------- Footer ---------- */
.footer { background: var(--green-900); color: rgba(255,255,255,.75); padding: 60px 0 0; }
.footer-grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1.3fr; gap: 40px;
  padding-bottom: 40px;
}
.footer-logo { height: 44px; background: #fff; padding: 6px 12px; border-radius: 8px; margin-bottom: 16px; }
.footer h5 { color: #fff; margin-bottom: 16px; font-size: 15px; }
.footer a { display: block; font-size: 14px; margin-bottom: 8px; color: rgba(255,255,255,.7); }
.footer a:hover { color: var(--gold-light); }
.footer p { font-size: 14px; margin-bottom: 8px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1);
  padding: 20px 0; text-align: center; font-size: 12px;
  color: rgba(255,255,255,.4);
}

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .nav-links {
    position: fixed; top: 64px; right: 0;
    background: var(--green-800); flex-direction: column;
    width: 240px; padding: 24px; gap: 18px;
    transform: translateX(100%); transition: transform .3s;
    height: calc(100vh - 64px);
  }
  .nav-links.open { transform: translateX(0); }
  .nav-toggle { display: block; }
  .toc-grid, .honor-row, .core-cards, .case-grid, .storage-grid {
    grid-template-columns: 1fr 1fr;
  }
  .case-grid-2col { grid-template-columns: 1fr; }
  .about-wrap { grid-template-columns: 1fr; }
  .coverage-wrap { grid-template-columns: 1fr; }
  .ip-grid { grid-template-columns: 1fr; }
  .cert-wall { grid-template-columns: repeat(3, 1fr); }
  .timeline { grid-template-columns: 1fr 1fr; gap: 30px; }
  .timeline::before { display: none; }
  .tl-item { padding-top: 0; padding-left: 30px; }
  .tl-dot { top: 4px; left: 0; }
  .stats-row, .env-row, .sol-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .std-cards { grid-template-columns: 1fr; }
}
@media (max-width: 600px) {
  .toc-grid, .honor-row, .core-cards, .case-grid, .storage-grid,
  .stats-row, .env-row, .sol-grid, .footer-grid,
  .ip-stats, .coverage-wrap { grid-template-columns: 1fr; }
  .cert-wall { grid-template-columns: repeat(2, 1fr); }
  .container { padding: 0 20px; }
  .section { padding: 60px 0; }
}