:root {
  --ink: #16233a;
  --muted: #5b6675;
  --accent: #0f3d6e;
  --accent-light: #e8f0f8;
  --silver: #c9cdd3;
  --bg: #ffffff;
  --bg-soft: #f6f7f9;
  --border: #e3e6ea;
  --gold: #8a6d1f;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.75;
  font-size: 16px;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.container { max-width: 1080px; margin: 0 auto; padding: 0 24px; }

/* header */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.96);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(6px);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.brand img { height: 38px; width: auto; display: block; }
.brand .reg { align-self: flex-start; font-size: 10px; color: var(--accent); margin-left: -4px; margin-top: 10px; }
.brand-text {
  font-size: 13px; color: var(--muted); line-height: 1.35;
  border-left: 1px solid var(--border); padding-left: 12px;
}
.brand-text b { display: block; color: var(--ink); font-size: 14px; font-weight: 600; }
.brand:hover { text-decoration: none; }
.nav-links { display: flex; gap: 28px; flex-wrap: wrap; }
.nav-links a { color: var(--muted); font-size: 15px; }
.nav-links a:hover, .nav-links a.active { color: var(--accent); font-weight: 600; text-decoration: none; }

/* hero —— 实拍产品图作背景
   图的比例被拉到 4.9:1（原图左侧补了逐行同色的延伸），这样 cover 会按**高度**铺满，
   任何常见屏宽下产品都完整可见，不会被切掉顶部。
   文字压在左侧延伸区，用米色渐层压住光影保证可读性。 */
.hero {
  position: relative;
  background-color: #ddd3ce;
  background-image: url("img/hero-mirror.jpg");
  background-size: cover;
  background-position: right bottom;
  background-repeat: no-repeat;
  padding: 104px 0 96px;
  min-height: clamp(560px, 30vw, 760px);
  display: flex;
  align-items: center;
}
/* 左侧米色渐层：文字区底色，同时让实拍图与文字自然过渡 */
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    90deg,
    rgba(238, 232, 227, 0.95) 0%,
    rgba(238, 232, 227, 0.88) 30%,
    rgba(238, 232, 227, 0.55) 48%,
    rgba(238, 232, 227, 0.12) 62%,
    rgba(238, 232, 227, 0) 70%
  );
  pointer-events: none;
}
.hero .container { position: relative; z-index: 1; width: 100%; }
.hero h1 {
  font-size: 46px;
  letter-spacing: 2px;
  margin-bottom: 20px;
  color: #1e1a17;
  line-height: 1.28;
}
.hero p { max-width: 450px; color: #4a423d; font-size: 16.5px; line-height: 1.85; }
.hero .tags {
  margin-top: 28px;
  color: #7d6733;
  font-size: 14px;
  letter-spacing: 1px;
  line-height: 1.85;
}
/* 中等宽度（平板横屏、小笔记本）：产品在画面右侧占得比较宽，
   收窄文字列宽，避免正文压到样品上 */
@media (min-width: 861px) and (max-width: 1120px) {
  .hero h1 { font-size: 38px; }
  .hero p { max-width: 340px; }
  .hero .tags { font-size: 13px; letter-spacing: 0; }
}

section { padding: 56px 0; }
section.soft { background: var(--bg-soft); }
.kicker { color: var(--gold); font-size: 14px; letter-spacing: 3px; margin-bottom: 8px; }
h2.section-title { font-size: 30px; margin-bottom: 14px; }
.section-sub { color: var(--muted); max-width: 760px; margin-bottom: 26px; }

/* stats */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.stat { background: #fff; border: 1px solid var(--border); border-radius: 12px; padding: 20px; text-align: center; }
.stat b { display: block; font-size: 24px; color: var(--accent); }
.stat span { color: var(--muted); font-size: 14px; }

/* cards */
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; align-items: start; }
.grid.two { grid-template-columns: repeat(2, 1fr); }
/* 卡片改用块级布局：不接受 flex/grid 的等高拉伸，高度始终等于内容高度，
   图片区用固定 1:1 容器承载，不会在图片上下产生空洞 */
.card {
  background: #fff; border: 1px solid var(--border); border-radius: 12px;
  padding: 14px 14px 16px; display: block;
  transition: box-shadow .2s;
}
.card:hover { box-shadow: 0 6px 18px rgba(22,35,58,.08); }
.card .thumb-box {
  display: block; width: 100%; height: auto; aspect-ratio: 1 / 1;
  overflow: hidden; border-radius: 8px; border: 1px solid var(--border);
  background: #fff; padding: 0; margin: 0 0 10px;
}
.card .thumb-box img {
  display: block; width: 100%; height: auto; object-fit: contain;
  border: 0; border-radius: 0; margin: 0; padding: 0;
}
.card:hover .thumb-box img { filter: brightness(1.02); }
.card .model { display: block; color: var(--gold); font-size: 12.5px; letter-spacing: 1px; margin-bottom: 1px; }
.card h3 { font-size: 16.5px; line-height: 1.4; margin: 0 0 4px; }
.card p { color: var(--muted); font-size: 13.5px; line-height: 1.6; margin: 0 0 8px; }
.card .price { display: block; color: var(--accent); font-weight: 700; font-size: 15px; margin-bottom: 6px; }
.card .spec { display: block; color: var(--muted); font-size: 12.5px; border-top: 1px dashed var(--border); padding-top: 8px; margin-bottom: 8px; }
.card a.more { display: inline-block; font-size: 13.5px; }
.p-hero { display: grid; grid-template-columns: 360px 1fr; gap: 40px; align-items: start; margin-bottom: 8px; }
.p-hero img {
  width: 100%; border-radius: 14px; border: 1px solid var(--border);
  background: #fff; display: block;
}
@media (max-width: 860px) {
  .p-hero { grid-template-columns: 1fr; gap: 24px; }
  .brand-text { display: none; }
}

/* article */
.article { max-width: 800px; margin: 0 auto; }
.article h1 { font-size: 30px; margin: 10px 0 6px; }
.article .meta { color: var(--muted); font-size: 14px; margin-bottom: 32px; }
.article h2 { font-size: 22px; margin: 36px 0 12px; }
.article h3 { font-size: 18px; margin: 26px 0 10px; }
.article p { margin-bottom: 14px; color: #2a3547; }
.article ul { margin: 0 0 14px 22px; color: #2a3547; }
.article table { width: 100%; border-collapse: collapse; margin: 18px 0; font-size: 14px; }
.article th, .article td { border: 1px solid var(--border); padding: 10px 12px; text-align: left; }
.article th { background: var(--bg-soft); }

/* product detail */
.crumb { color: var(--muted); font-size: 14px; margin-bottom: 18px; }
.p-head { display: flex; flex-wrap: wrap; gap: 12px; align-items: baseline; }
.p-head h1 { font-size: 32px; }
.badge { background: var(--accent-light); color: var(--accent); border-radius: 999px; padding: 3px 12px; font-size: 13px; }
.p-tagline { color: var(--muted); margin: 10px 0 6px; font-size: 17px; }
.p-price { font-size: 20px; color: var(--accent); font-weight: 700; }
.param-table { width: 100%; border-collapse: collapse; margin: 18px 0; }
.param-table th, .param-table td { border: 1px solid var(--border); padding: 10px 14px; font-size: 15px; text-align: left; }
.param-table th { width: 220px; background: var(--bg-soft); color: var(--muted); font-weight: 600; }
.steps { counter-reset: step; list-style: none; margin: 12px 0; }
.steps li { position: relative; padding: 8px 0 8px 44px; color: #2a3547; }
.steps li::before {
  counter-increment: step; content: counter(step, decimal-leading-zero);
  position: absolute; left: 0; top: 10px;
  font-size: 13px; color: var(--accent); font-weight: 700;
}
.uses { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 12px; }
.uses span { background: var(--bg-soft); border: 1px solid var(--border); border-radius: 999px; padding: 4px 14px; font-size: 14px; color: var(--muted); }
.notice { background: #fdf8ee; border: 1px solid #eedfb8; border-radius: 10px; padding: 16px 20px; margin: 16px 0; }
.notice ul { margin-left: 20px; color: #5c4d21; }

/* cta + footer */
.cta-box {
  background: linear-gradient(150deg, #16233a, #1d3557);
  color: #fff; border-radius: 16px; padding: 44px 40px; margin: 24px 0;
}
.cta-box h2 { color: #fff; }
.cta-box p { color: #c8d4e4; margin: 8px 0 20px; }
.btn {
  display: inline-block; background: #d8b64a; color: #16233a !important;
  font-weight: 700; border-radius: 8px; padding: 12px 28px; text-decoration: none;
}
.btn:hover { text-decoration: none; filter: brightness(1.05); }
.site-footer { background: #101c30; color: #9fb3cc; padding: 48px 0 32px; font-size: 14px; }
.site-footer h4 { color: #fff; margin-bottom: 12px; font-size: 16px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 32px; }
.site-footer a { color: #c8d4e4; }
.footer-bottom { border-top: 1px solid #2a3a55; margin-top: 32px; padding-top: 20px; color: #6d7f99; font-size: 13px; }
.contact-line b { color: #fff; font-size: 18px; }

@media (max-width: 860px) {
  .grid, .grid.two { grid-template-columns: 1fr; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 32px; letter-spacing: 1px; }

  /* 窄屏改为「上文字、下产品」两段式：
     图片按固定高度（285px）贴在底部，下方留 300px 给它，
     文字区用自上而下的米色渐层压住，避免文字压在样品上。 */
  .hero {
    min-height: 0;
    display: block;
    padding: 44px 0 300px;
    background-size: auto 285px;
    background-position: right bottom;
  }
  .hero::before {
    background: linear-gradient(
      180deg,
      rgba(238, 232, 227, 0.97) 0%,
      rgba(238, 232, 227, 0.95) 44%,
      rgba(238, 232, 227, 0.62) 54%,
      rgba(238, 232, 227, 0.12) 62%,
      rgba(238, 232, 227, 0) 68%
    );
  }
  .hero p { max-width: none; font-size: 15.5px; }
  .hero .tags { margin-top: 20px; letter-spacing: 0; line-height: 1.9; }
}