:root {
  --bg: #0e1116;
  --bg-2: #141a22;
  --surface: #1a212b;
  --surface-2: #202a35;
  --green: #18a957;
  --green-deep: #0f7f3f;
  --green-soft: rgba(24, 169, 87, 0.14);
  --accent: #ffb300;
  --accent-2: #ff7a00;
  --text: #eef3f8;
  --muted: #97a6b6;
  --line: rgba(255, 255, 255, 0.09);
  --radius: 16px;
  --shadow: 0 18px 40px rgba(0, 0, 0, 0.45);
  --maxw: 1180px;
  --font: "PingFang SC", "Microsoft YaHei", "Segoe UI", system-ui, -apple-system, Roboto, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(24, 169, 87, 0.12), transparent 60%),
    radial-gradient(900px 500px at -10% 10%, rgba(255, 179, 0, 0.07), transparent 55%),
    var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 14px clamp(16px, 4vw, 40px);
  background: rgba(14, 17, 22, 0.82);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}

.brand { display: flex; align-items: center; gap: 12px; margin-right: auto; }
.brand-mark {
  display: grid; place-items: center;
  width: 42px; height: 42px; border-radius: 12px;
  color: #fff;
  background: linear-gradient(135deg, var(--green), var(--green-deep));
  box-shadow: 0 6px 16px rgba(24, 169, 87, 0.35);
}
.brand-text { display: flex; flex-direction: column; font-weight: 800; letter-spacing: .5px; }
.brand-text small { font-weight: 500; font-size: 11px; color: var(--muted); letter-spacing: 1px; }

.site-nav { display: flex; gap: 26px; }
.site-nav a { color: var(--muted); font-size: 15px; font-weight: 600; transition: color .2s; }
.site-nav a:hover { color: var(--text); }

.tel-pill {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 16px; border-radius: 999px; font-weight: 800; font-size: 14px;
  color: #11161c;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 8px 20px rgba(255, 122, 0, 0.3);
  white-space: nowrap;
}

/* ---------- Hero ---------- */
.hero { position: relative; overflow: hidden; padding: clamp(60px, 10vw, 120px) clamp(16px, 4vw, 40px) clamp(50px, 7vw, 90px); }
.hero-stripe {
  position: absolute; inset: 0 0 auto 0; height: 8px;
  background: repeating-linear-gradient(45deg, var(--accent) 0 22px, #11161c 22px 44px);
  opacity: .9;
}
.hero-inner { max-width: var(--maxw); margin: 0 auto; }
.hero-eyebrow {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 7px 14px; border-radius: 999px;
  background: var(--green-soft); border: 1px solid rgba(24, 169, 87, 0.3);
  color: #7ee6a6; font-weight: 700; font-size: 13px; letter-spacing: .5px; margin: 0 0 22px;
}
.hero-eyebrow .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--green); box-shadow: 0 0 0 4px rgba(24,169,87,.25); }

.hero-title { font-size: clamp(38px, 7vw, 78px); line-height: 1.05; margin: 0 0 18px; font-weight: 900; letter-spacing: 1px; }
.hero-title .hl {
  background: linear-gradient(120deg, var(--green) 10%, var(--accent) 95%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-sub { max-width: 640px; font-size: clamp(16px, 2.2vw, 20px); color: var(--muted); margin: 0 0 32px; }

.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 46px; }

.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 24px; border-radius: 12px; font-weight: 800; font-size: 15px;
  cursor: pointer; border: 1px solid transparent; transition: transform .15s ease, box-shadow .2s ease, background .2s;
}
.btn:active { transform: translateY(1px); }
.btn-primary { color: #fff; background: linear-gradient(135deg, var(--green), var(--green-deep)); box-shadow: 0 12px 26px rgba(24,169,87,.35); }
.btn-primary:hover { box-shadow: 0 16px 34px rgba(24,169,87,.5); }
.btn-ghost { color: var(--text); background: rgba(255,255,255,.05); border-color: var(--line); }
.btn-ghost:hover { background: rgba(255,255,255,.1); }
.btn-lg { padding: 17px 34px; font-size: 17px; }

.hero-feats { list-style: none; display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin: 0; padding: 0; max-width: 760px; }
.hero-feats li {
  background: linear-gradient(180deg, var(--surface), var(--bg-2));
  border: 1px solid var(--line); border-radius: 14px; padding: 16px 18px;
  display: flex; flex-direction: column;
}
.hero-feats strong { font-size: 17px; }
.hero-feats span { font-size: 13px; color: var(--muted); }

/* ---------- 通用 section ---------- */
.section { max-width: var(--maxw); margin: 0 auto; padding: clamp(56px, 8vw, 96px) clamp(16px, 4vw, 40px); }
.section-alt { max-width: none; background: linear-gradient(180deg, var(--bg-2), transparent); border-block: 1px solid var(--line); }
.section-alt > * { max-width: var(--maxw); margin-inline: auto; }
.section-head { margin-bottom: 40px; }
.kicker { display: inline-block; color: var(--accent); font-weight: 800; letter-spacing: 2px; font-size: 13px; text-transform: uppercase; margin: 0 0 10px; }
.section-head h2 { font-size: clamp(26px, 4vw, 40px); margin: 0 0 10px; font-weight: 900; }
.lead { color: var(--muted); font-size: 17px; margin: 0; max-width: 620px; }

/* ---------- 服务卡 ---------- */
.service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.service-card {
  position: relative; padding: 26px 24px; border-radius: var(--radius);
  background: linear-gradient(180deg, var(--surface), var(--bg-2));
  border: 1px solid var(--line); overflow: hidden;
  transition: transform .2s ease, border-color .2s;
}
.service-card::before {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 4px;
  background: linear-gradient(var(--green), var(--accent));
}
.service-card:hover { transform: translateY(-5px); border-color: rgba(24,169,87,.4); }
.svc-ico {
  display: grid; place-items: center; width: 48px; height: 48px; border-radius: 12px;
  font-weight: 900; font-size: 20px; color: var(--green);
  background: var(--green-soft); border: 1px solid rgba(24,169,87,.3); margin-bottom: 16px;
}
.service-card h3 { margin: 0 0 8px; font-size: 19px; }
.service-card p { margin: 0; color: var(--muted); font-size: 15px; }

/* ---------- 视频网格 ---------- */
.video-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.video-card {
  border-radius: var(--radius); overflow: hidden; background: var(--surface);
  border: 1px solid var(--line); box-shadow: var(--shadow);
}
.video-stage { position: relative; aspect-ratio: 16 / 10; background: #000; overflow: hidden; }
.video-stage video { width: 100%; height: 100%; object-fit: cover; display: block; background: #000; }
.video-poster {
  position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover;
  transition: transform .4s ease, filter .3s;
}
.video-card:hover .video-poster { transform: scale(1.05); filter: brightness(.85); }
.play-btn {
  position: absolute; inset: 0; display: grid; place-items: center; border: 0; cursor: pointer;
  background: linear-gradient(180deg, rgba(0,0,0,.05), rgba(0,0,0,.45)); color: #fff;
}
.play-btn span {
  display: grid; place-items: center; width: 72px; height: 72px; border-radius: 50%;
  background: rgba(24,169,87,.92); box-shadow: 0 10px 30px rgba(0,0,0,.5); transition: transform .2s, background .2s;
}
.play-btn:hover span { transform: scale(1.08); background: var(--green); }
.play-btn svg { margin-left: 4px; }
.video-meta { padding: 16px 18px; }
.video-meta h3 { margin: 0 0 4px; font-size: 17px; }
.video-meta p { margin: 0; color: var(--muted); font-size: 14px; }
.video-tag {
  display: inline-block; margin-bottom: 10px; padding: 4px 10px; border-radius: 999px; font-size: 12px; font-weight: 700;
  color: var(--accent); background: rgba(255,179,0,.12); border: 1px solid rgba(255,179,0,.3);
}

/* ---------- 图片网格 ---------- */
.photo-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.photo-item {
  position: relative; border-radius: 14px; overflow: hidden; cursor: zoom-in;
  border: 1px solid var(--line); background: var(--surface); aspect-ratio: 3 / 4;
}
.photo-item img { width: 100%; height: 100%; object-fit: cover; transition: transform .45s ease; }
.photo-item:hover img { transform: scale(1.07); }
.photo-cap {
  position: absolute; left: 0; right: 0; bottom: 0; padding: 26px 14px 12px; font-size: 14px; font-weight: 700;
  color: #fff; background: linear-gradient(transparent, rgba(0,0,0,.78));
  opacity: 0; transform: translateY(8px); transition: opacity .25s, transform .25s;
}
.photo-item:hover .photo-cap { opacity: 1; transform: translateY(0); }
.photo-item .zoom-ico {
  position: absolute; top: 10px; right: 10px; width: 32px; height: 32px; border-radius: 9px;
  display: grid; place-items: center; color: #fff; background: rgba(0,0,0,.4); backdrop-filter: blur(4px);
  opacity: 0; transition: opacity .25s;
}
.photo-item:hover .zoom-ico { opacity: 1; }

/* ---------- 联系 ---------- */
.contact { position: relative; margin-top: 30px; padding: clamp(56px, 8vw, 96px) clamp(16px, 4vw, 40px); overflow: hidden;
  background: linear-gradient(135deg, rgba(24,169,87,.16), rgba(255,179,0,.08)); border-block: 1px solid var(--line); }
.contact-stripe { position: absolute; left: 0; right: 0; bottom: 0; height: 8px;
  background: repeating-linear-gradient(45deg, var(--accent) 0 22px, #11161c 22px 44px); opacity: .85; }
.contact-inner { max-width: var(--maxw); margin: 0 auto; text-align: center; }
.contact-inner h2 { font-size: clamp(26px, 4vw, 42px); margin: 0 0 12px; font-weight: 900; }
.contact-inner p { color: var(--muted); font-size: 18px; margin: 0 0 28px; }

/* ---------- 页脚 ---------- */
.site-footer { padding: 40px 24px 56px; text-align: center; color: var(--muted); border-top: 1px solid var(--line); }
.site-footer p { margin: 6px 0; }
.foot-tel { font-size: 18px; color: var(--text); font-weight: 700; }
.foot-tel a { color: var(--green); }
.foot-note { font-size: 13px; opacity: .7; }

/* ---------- 灯箱 ---------- */
.lightbox {
  position: fixed; inset: 0; z-index: 100; display: none;
  background: rgba(6, 8, 11, 0.93); backdrop-filter: blur(6px);
  align-items: center; justify-content: center; padding: 4vh 2vw;
}
.lightbox.open { display: flex; }
.lb-stage { margin: 0; display: flex; flex-direction: column; align-items: center; gap: 14px; max-width: 92vw; max-height: 92vh; }
#lb-img { max-width: 92vw; max-height: 80vh; border-radius: 12px; box-shadow: 0 30px 80px rgba(0,0,0,.7); }
#lb-cap { color: #e8edf2; font-weight: 600; font-size: 15px; }
.lb-close, .lb-nav {
  position: absolute; top: 50%; transform: translateY(-50%); width: 52px; height: 52px;
  border-radius: 50%; border: 1px solid var(--line); background: rgba(255,255,255,.08); color: #fff;
  font-size: 22px; cursor: pointer; display: grid; place-items: center; transition: background .2s;
}
.lb-nav:hover, .lb-close:hover { background: rgba(255,255,255,.2); }
.lb-prev { left: 18px; }
.lb-next { right: 18px; }
.lb-close { top: 22px; right: 22px; transform: none; width: 46px; height: 46px; font-size: 26px; }

/* ---------- 响应式 ---------- */
@media (max-width: 920px) {
  .site-nav { display: none; }
  .service-grid { grid-template-columns: repeat(2, 1fr); }
  .video-grid { grid-template-columns: 1fr; }
  .photo-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-feats { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .tel-pill span { display: none; }
  .service-grid { grid-template-columns: 1fr; }
  .photo-grid { grid-template-columns: 1fr; }
  .hero-feats { grid-template-columns: 1fr 1fr; }
  .lb-nav { width: 44px; height: 44px; }
}