/* ==========================================================================
   SAGHU — 静态站样式（2026-09-30 重建）
   设计规范来自原站：主色 #AC1414 / 链接 #CC3366 / 正文 #333
   ========================================================================== */

:root {
  --brand: #AC1414;
  --brand-dark: #8B0F0F;
  --brand-light: #C9302C;
  --link: #CC3366;
  --text: #333333;
  --text-muted: #6B7280;
  --bg: #FFFFFF;
  --bg-alt: #F7F8FA;
  --bg-dark: #1A1A1A;
  --border: #E5E7EB;
  --radius: 8px;
  --radius-lg: 16px;
  --shadow: 0 2px 8px rgba(0,0,0,.06);
  --shadow-lg: 0 8px 28px rgba(0,0,0,.10);
  --wrap: 1200px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue",
               Arial, "Noto Sans", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
}

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

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

h1, h2, h3, h4, h5 { margin: 0 0 .6em; font-weight: 500; line-height: 1.25; color: var(--text); }
h1 { font-size: clamp(28px, 4vw, 44px); }
h2 { font-size: clamp(24px, 3.2vw, 40px); }
h3 { font-size: clamp(19px, 2.2vw, 28px); }
h4 { font-size: 18px; }
p { margin: 0 0 1em; }

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 20px; }
.section { padding: 64px 0; }
.section--alt { background: var(--bg-alt); }
.section--dark { background: var(--bg-dark); color: #fff; }
.section--dark h2, .section--dark h3 { color: #fff; }
.center { text-align: center; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-block; padding: 12px 28px; border-radius: var(--radius);
  background: var(--brand); color: #fff; font-size: 15px; font-weight: 500;
  border: 0; cursor: pointer; transition: background .18s, transform .18s;
  text-decoration: none;
}
.btn:hover { background: var(--brand-dark); transform: translateY(-1px); text-decoration: none; color: #fff; }
.btn--outline { background: transparent; border: 2px solid var(--brand); color: var(--brand); }
.btn--outline:hover { background: var(--brand); color: #fff; }
.btn--lg { padding: 15px 38px; font-size: 17px; }
.btn--block { display: block; width: 100%; text-align: center; }

/* ---------- 顶栏 ---------- */
.topbar {
  position: sticky; top: 0; z-index: 100; background: #fff;
  border-bottom: 1px solid var(--border);
}
.topbar__inner { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.logo img { height: 40px; width: auto; }
.nav { display: flex; align-items: center; gap: 4px; list-style: none; margin: 0; padding: 0; }
.nav > li { position: relative; }
.nav a {
  display: block; padding: 10px 16px; color: var(--text); font-size: 15px;
  border-radius: 6px; transition: color .16s, background .16s;
}
.nav a:hover, .nav a.is-active { color: var(--brand); background: rgba(172,20,20,.06); text-decoration: none; }
.nav .sub {
  position: absolute; top: 100%; left: 0; min-width: 260px; background: #fff;
  border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow-lg);
  padding: 8px; list-style: none; margin: 0; opacity: 0; visibility: hidden;
  transform: translateY(6px); transition: .18s;
}
.nav li:hover .sub { opacity: 1; visibility: visible; transform: translateY(0); }
.nav .sub a { padding: 9px 12px; font-size: 14px; }
.nav__toggle { display: none; background: none; border: 0; font-size: 26px; cursor: pointer; color: var(--text); }

/* ---------- Hero ---------- */
.hero {
  background: linear-gradient(135deg, #2b2b2b 0%, #4a1010 100%);
  color: #fff; padding: 88px 0; text-align: center;
}
.hero h1, .hero h2 { color: #fff; font-size: clamp(28px, 4.4vw, 55px); }
.hero p { color: rgba(255,255,255,.88); font-size: 17px; max-width: 760px; margin: 0 auto 1.6em; }

/* ---------- 网格 ---------- */
.grid { display: grid; gap: 28px; }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }

/* ---------- 产品卡片 ---------- */
.card {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius-lg);
  overflow: hidden; transition: box-shadow .2s, transform .2s; display: flex; flex-direction: column;
}
.card:hover { box-shadow: var(--shadow-lg); transform: translateY(-3px); }
.card__img { aspect-ratio: 4/3; background: #fafafa; display: flex; align-items: center; justify-content: center; overflow: hidden; }
.card__img img { width: 100%; height: 100%; object-fit: contain; padding: 14px; }
.card__body { padding: 18px 20px 22px; flex: 1; display: flex; flex-direction: column; }
.card__title { font-size: 17px; font-weight: 500; color: var(--text); margin: 0 0 6px; }
.card__meta { font-size: 13.5px; color: var(--text-muted); margin: 0 0 12px; flex: 1; }
.card__more { font-size: 14px; color: var(--brand); font-weight: 500; }
.card__more:hover { text-decoration: none; opacity: .8; }

/* ---------- 内容块 ---------- */
.prose { max-width: 900px; margin: 0 auto; }
.prose p { color: #444; }
.prose img { margin: 22px auto; border-radius: var(--radius); }

/* ---------- 面包屑 ---------- */
.crumbs { font-size: 14px; color: var(--text-muted); padding: 18px 0; }
.crumbs a { color: var(--text-muted); }
.crumbs span { margin: 0 8px; opacity: .6; }

/* ---------- 规格表 ---------- */
.spec { width: 100%; border-collapse: collapse; margin: 22px 0; font-size: 15px; }
.spec th, .spec td { border: 1px solid var(--border); padding: 11px 14px; text-align: left; }
.spec th { background: var(--bg-alt); font-weight: 500; width: 34%; }
.spec tr:nth-child(even) td { background: #fcfcfd; }

/* ---------- 表单 ---------- */
.form { display: grid; gap: 14px; max-width: 560px; }
.form label { font-size: 14px; font-weight: 500; display: block; margin-bottom: 5px; }
.form input, .form textarea, .form select {
  width: 100%; padding: 11px 14px; border: 1px solid var(--border);
  border-radius: var(--radius); font-size: 15px; font-family: inherit; background: #fff;
}
.form input:focus, .form textarea:focus { outline: 2px solid rgba(172,20,20,.25); border-color: var(--brand); }
.form textarea { min-height: 110px; resize: vertical; }
.form__msg { padding: 12px 16px; border-radius: var(--radius); font-size: 14px; display: none; }
.form__msg.ok { background: #ECFDF5; color: #065F46; border: 1px solid #A7F3D0; display: block; }
.form__msg.err { background: #FEF2F2; color: #991B1B; border: 1px solid #FECACA; display: block; }

/* ---------- 页脚 ---------- */
.footer { background: var(--bg-dark); color: rgba(255,255,255,.78); padding: 56px 0 26px; font-size: 14.5px; }
.footer a { color: rgba(255,255,255,.78); }
.footer a:hover { color: #fff; }
.footer h4 { color: #fff; font-size: 15px; margin: 0 0 14px; }
.footer__cols { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.6fr; gap: 34px; }
.footer ul { list-style: none; margin: 0; padding: 0; }
.footer li { margin-bottom: 8px; }
.footer__bottom { border-top: 1px solid rgba(255,255,255,.12); margin-top: 40px; padding-top: 20px;
                  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; font-size: 13.5px; }
.socials { display: flex; gap: 12px; margin-top: 10px; }
.socials a { width: 36px; height: 36px; border-radius: 50%; background: rgba(255,255,255,.1);
             display: flex; align-items: center; justify-content: center; font-size: 15px; }
.socials a:hover { background: var(--brand); color: #fff; }

/* ---------- 响应式 ---------- */
@media (max-width: 980px) {
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .grid--3 { grid-template-columns: repeat(2, 1fr); }
  .footer__cols { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 720px) {
  .section { padding: 44px 0; }
  .hero { padding: 56px 0; }
  .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; }
  .footer__cols { grid-template-columns: 1fr; }
  .nav__toggle { display: block; }
  .nav {
    position: absolute; top: 72px; left: 0; right: 0; background: #fff; flex-direction: column;
    align-items: stretch; padding: 10px; border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-lg); display: none;
  }
  .nav.is-open { display: flex; }
  .nav .sub { position: static; opacity: 1; visibility: visible; transform: none;
              box-shadow: none; border: 0; padding-left: 12px; }
}

/* ---------- 打印 ---------- */
@media print { .topbar, .footer, .btn { display: none; } }