/* blinlights studio — 节日灯饰
   设计基准：英国节日灯零售站（Lights4fun / WeRChristmas / Festive Lights）
   白底、规矩卡片、产品图为主、无动画 */

:root {
  --green: #2d6a4f;
  --green-dark: #1f4d3a;
  --ink: #1f2d3d;
  --muted: #6b7a88;
  --line: #e2e8e4;
  --bg-soft: #f6f8f6;
  --radius: 6px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: "Microsoft YaHei", "PingFang SC", system-ui, sans-serif;
  color: var(--ink);
  background: #fff;
  font-size: 15px;
  line-height: 1.75;
}

a { color: var(--green); text-decoration: none; }
a:hover { color: var(--green-dark); text-decoration: underline; }

img { display: block; max-width: 100%; }

.wrap { max-width: 1200px; margin: 0 auto; padding: 0 22px; }

/* ---------- 导航 ---------- */
header {
  background: #fff;
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 50;
}
.nav {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 60px;
}
.nav-links { display: flex; gap: 34px; font-size: 14px; }
.nav-links a { color: var(--ink); }
.nav-links a:hover { color: var(--green); text-decoration: none; }

.menu-btn {
  display: none;
  background: none; border: 1px solid var(--line);
  border-radius: var(--radius);
  font-size: 18px; line-height: 1;
  padding: 5px 11px; cursor: pointer; color: var(--ink);
}

/* ---------- Hero ---------- */
.hero { position: relative; }
.hero img { width: 100%; height: 520px; object-fit: cover; }
.hero .overlay {
  position: absolute; inset: 0;
  background: rgba(15, 26, 20, .48);
  display: flex; align-items: center; justify-content: center;
  text-align: center;
}
.hero .inner { color: #fff; padding: 0 20px; }
.hero h1 { font-size: 2.5rem; font-weight: 700; letter-spacing: 2px; }
.hero p { margin: 14px 0 26px; font-size: 1.05rem; opacity: .92; letter-spacing: 1px; }
.btn {
  display: inline-block;
  background: var(--green); color: #fff;
  padding: 11px 32px;
  border-radius: var(--radius);
  font-size: 14.5px;
}
.btn:hover { background: var(--green-dark); color: #fff; text-decoration: none; }
.btn.ghost {
  background: transparent; color: #fff;
  border: 1px solid rgba(255,255,255,.75);
  margin-left: 12px;
}
.btn.ghost:hover { border-color: #fff; background: rgba(255,255,255,.12); }

/* ---------- 区块通用 ---------- */
.section { padding: 56px 0; }
.section.soft { background: var(--bg-soft); }
.sec-head { text-align: center; margin-bottom: 34px; }
.sec-head h2 { font-size: 1.55rem; font-weight: 700; letter-spacing: 1px; }
.sec-head p { color: var(--muted); font-size: 14px; margin-top: 6px; letter-spacing: .5px; }

/* ---------- 系列卡片（首页主体） ---------- */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.coll-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  overflow: hidden;
}
.coll-card .img { height: 200px; overflow: hidden; }
.coll-card .img img { width: 100%; height: 100%; object-fit: cover; }
.coll-card .body { padding: 16px 18px 18px; }
.coll-card h3 { font-size: 1.02rem; margin-bottom: 6px; }
.coll-card p { color: var(--muted); font-size: 13.5px; margin-bottom: 10px; }
.coll-card .more { font-size: 13.5px; font-weight: 600; }

/* ---------- 节日与场景（首页精选大卡） ---------- */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.feature-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: #fff;
}
.feature-card .img { height: 400px; overflow: hidden; }
.feature-card .img img { width: 100%; height: 100%; object-fit: cover; }
.feature-card .body { padding: 18px 20px 20px; }
.feature-card h3 { font-size: 1.15rem; margin-bottom: 8px; }
.feature-card p { color: var(--muted); font-size: 14px; margin-bottom: 10px; }
.feature-card .more { font-size: 13.5px; font-weight: 600; }

/* ---------- 双图场景块 ---------- */
.duo {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px;
}
.duo-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: #fff;
}
.duo-card .img { height: 240px; overflow: hidden; }
.duo-card .img img { width: 100%; height: 100%; object-fit: cover; }
.duo-card .body { padding: 16px 18px 18px; }
.duo-card h3 { font-size: 1.02rem; margin-bottom: 6px; }
.duo-card p { color: var(--muted); font-size: 13.5px; margin-bottom: 10px; }

/* ---------- 信任条（Why choose us） ---------- */
.why {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}
.why-item { text-align: center; padding: 0 6px; }
.why-item .ico {
  width: 60px; height: 60px;
  margin: 0 auto 14px;
  border: 1px solid var(--line);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: var(--green);
}
.why-item .ico svg { width: 27px; height: 27px; }
.why-item h3 { font-size: 1.05rem; margin-bottom: 7px; letter-spacing: .5px; }
.why-item p { color: var(--muted); font-size: 13.5px; }

/* ---------- 关于段（首页） ---------- */
.about-strip { text-align: center; max-width: 720px; margin: 0 auto; }
.about-strip h2 { font-size: 1.55rem; margin-bottom: 14px; letter-spacing: 1px; }
.about-strip p { color: var(--muted); font-size: 15px; margin-bottom: 22px; }

/* ---------- 内页头部 ---------- */
.page-head {
  background: var(--bg-soft);
  border-bottom: 1px solid var(--line);
  padding: 44px 0 38px;
  text-align: center;
}
.page-head h1 { font-size: 1.8rem; letter-spacing: 1px; }
.page-head p { color: var(--muted); font-size: 14px; margin-top: 8px; }

/* ---------- 产品系列块（products 页） ---------- */
.series-block { padding: 48px 0; }
.series-block.alt { background: var(--bg-soft); }
.series-intro {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 26px;
  align-items: center;
  margin-bottom: 28px;
}
.series-intro img {
  width: 100%; height: 250px; object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--line);
}
.series-intro h2 { font-size: 1.3rem; margin-bottom: 10px; }
.series-intro p { color: var(--muted); font-size: 14px; }

.prod-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  padding: 20px 18px;
}
.prod-card .ico {
  color: var(--green);
  margin-bottom: 10px;
}
.prod-card .ico svg { width: 34px; height: 34px; }
.prod-card .sku {
  font-size: 11.5px; color: var(--muted);
  letter-spacing: .5px; margin-bottom: 4px;
}
.prod-card h4 { font-size: .98rem; margin-bottom: 6px; }
.prod-card .spec {
  font-size: 12.5px; color: var(--green-dark);
  background: var(--bg-soft);
  border-radius: 4px;
  padding: 3px 8px;
  display: inline-block;
  margin-bottom: 8px;
}
.prod-card p { color: var(--muted); font-size: 13px; }

.note {
  text-align: center; color: var(--muted);
  font-size: 13px; padding: 30px 0 40px;
}

/* ---------- 指南（topics 页） ---------- */
.guide {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 26px;
  padding: 34px 0;
  border-bottom: 1px solid var(--line);
  align-items: start;
}
.guide:last-of-type { border-bottom: none; }
.guide .img { border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line); }
.guide .img img { width: 100%; height: 190px; object-fit: cover; }
.guide h2 { font-size: 1.15rem; margin-bottom: 10px; }
.guide p { color: var(--muted); font-size: 14px; margin-bottom: 10px; }
.guide ul { color: var(--muted); font-size: 13.5px; padding-left: 20px; margin-bottom: 10px; }
.guide table { border-collapse: collapse; width: 100%; margin: 10px 0; font-size: 13.5px; }
.guide th, .guide td { border: 1px solid var(--line); padding: 6px 10px; text-align: center; }
.guide th { background: var(--bg-soft); color: var(--ink); font-weight: 600; }
.guide td:first-child { text-align: left; }

/* ---------- 节奏表（topics 页） ---------- */
.cal-table { border-collapse: collapse; width: 100%; font-size: 13.5px; }
.cal-table th, .cal-table td { border: 1px solid var(--line); padding: 8px 12px; text-align: left; }
.cal-table th { background: var(--bg-soft); font-weight: 600; }
.cal-table td.month { width: 70px; font-weight: 600; color: var(--green-dark); white-space: nowrap; }

/* ---------- 关于我们页 ---------- */
.about-hero {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 30px;
  align-items: center;
  margin-bottom: 46px;
}
.about-hero img {
  width: 100%; height: 280px; object-fit: cover;
  border-radius: var(--radius); border: 1px solid var(--line);
}
.about-hero h1 { font-size: 1.6rem; margin-bottom: 12px; }
.about-hero p { color: var(--muted); font-size: 14.5px; margin-bottom: 10px; }

.principles {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  margin-bottom: 8px;
}
.principle {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px 20px;
  background: #fff;
}
.principle h3 { font-size: 1rem; margin-bottom: 8px; color: var(--green-dark); }
.principle p { color: var(--muted); font-size: 13.5px; }

.coop-note {
  text-align: center; color: var(--muted);
  font-size: 13.5px; padding: 26px 0 6px;
}

/* ---------- 页脚 ---------- */
footer {
  border-top: 1px solid var(--line);
  background: var(--bg-soft);
  padding: 40px 0 26px;
  margin-top: 20px;
}
.foot-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 26px;
  margin-bottom: 28px;
}
.foot-grid h4 { font-size: .92rem; margin-bottom: 10px; color: var(--ink); }
.foot-grid p, .foot-grid li { color: var(--muted); font-size: 13px; }
.foot-grid ul { list-style: none; }
.foot-grid li { margin-bottom: 6px; }
.foot-grid a { color: var(--muted); }
.foot-grid a:hover { color: var(--green); }
.foot-icp {
  border-top: 1px solid var(--line);
  padding-top: 18px;
  text-align: center;
  color: var(--muted);
  font-size: 12.5px;
}
.foot-icp a { color: var(--muted); }
.foot-icp a:hover { color: var(--green); }
a.inner-dot { opacity: .55; font-size: 12px; text-decoration: none; }

/* ---------- 响应式 ---------- */
@media (max-width: 900px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .why { grid-template-columns: repeat(2, 1fr); row-gap: 28px; }
  .duo { grid-template-columns: 1fr; }
  .feature-card .img { height: 300px; }
  .series-intro { grid-template-columns: 1fr; }
  .series-intro img { height: 200px; }
  .guide { grid-template-columns: 1fr; }
  .guide .img img { height: 170px; }
  .about-hero { grid-template-columns: 1fr; }
  .principles { grid-template-columns: 1fr; }
  .foot-grid { grid-template-columns: 1fr 1fr; }
  .hero img { height: 380px; }
}

@media (max-width: 620px) {
  .nav { justify-content: flex-start; }
  .menu-btn { display: block; }
  .nav-links {
    display: none;
    position: absolute;
    top: 60px; left: 0; right: 0;
    background: #fff;
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    gap: 0;
    padding: 8px 22px 14px;
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 9px 0; border-bottom: 1px solid var(--bg-soft); }
  .grid-3 { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
  .feature-card .img { height: 220px; }
  .hero img { height: 300px; }
  .hero h1 { font-size: 1.6rem; letter-spacing: 1px; }
  .hero .btn.ghost { margin-left: 0; margin-top: 10px; }
  .hero .inner .btns { display: flex; flex-direction: column; align-items: center; }
  .why { grid-template-columns: 1fr; }
  .foot-grid { grid-template-columns: 1fr; }
  .section { padding: 40px 0; }
}