/* GlaceFlow static showcase —冰川蓝设计规范 */
:root {
  --primary: #2E7CF6;
  --dark: #0B1F3A;
  --ice: #F5FAFF;
  --text: #1A2333;
  --muted: #5B6B7F;
  --card: #FFFFFF;
  --radius: 14px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial, "PingFang SC", sans-serif;
  background: var(--ice);
  color: var(--text);
  line-height: 1.6;
}
a { color: var(--primary); text-decoration: none; }
img { max-width: 100%; display: block; }

/* Header */
header {
  background: var(--card);
  border-bottom: 1px solid #E3EDF9;
  position: sticky; top: 0; z-index: 50;
}
.nav {
  max-width: 1100px; margin: 0 auto; padding: 14px 20px;
  display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 10px;
}
.logo { font-size: 1.35rem; font-weight: 800; color: var(--dark); letter-spacing: .5px; }
.logo span { color: var(--primary); }
.logo-link { display: flex; align-items: center; }
.logo-img { height: 46px; width: auto; display: block; }
.logo-text { font-size: 1.35rem; font-weight: 800; color: #E56631; letter-spacing: .5px; margin-left: 10px; white-space: nowrap; }
nav ul { display: flex; gap: 18px; list-style: none; flex-wrap: wrap; }
nav a { color: var(--muted); font-weight: 600; font-size: .95rem; }
nav a:hover, nav a.active { color: var(--primary); }

/* Language switcher */
.lang-btn {
  background: transparent; border: 1.5px solid var(--primary); color: var(--primary);
  font-weight: 700; font-size: .82rem; padding: 6px 14px; border-radius: 999px;
  cursor: pointer; margin-left: 4px; transition: background .15s ease, color .15s ease;
}
.lang-btn:hover { background: var(--primary); color: #fff; }

/* Hero */
.hero { background: linear-gradient(135deg, #EAF3FF 0%, #F5FAFF 60%); padding: 64px 20px 48px; text-align: center; position: relative; overflow: hidden; }
.hero > * { position: relative; z-index: 1; }
.hero::before {
  content: ""; position: absolute; inset: 0; z-index: 0; pointer-events: none;
  background: url("logo.png") 50% 50% / 520px no-repeat;
  opacity: .1;
}

/* Categories section logo watermark */
#categories { position: relative; overflow: hidden; }
#categories > * { position: relative; z-index: 1; }
#categories::before {
  content: ""; position: absolute; inset: 0; z-index: 0; pointer-events: none;
  background: url("logo.png") 50% 50% / 460px no-repeat;
  opacity: .07;
}

/* Full-page logo watermark: every section + footer, top to bottom */
section, footer { position: relative; overflow: hidden; }
section > *, footer > * { position: relative; z-index: 1; }
section::before, footer::before {
  content: ""; position: absolute; inset: 0; z-index: 0; pointer-events: none;
  background: url("logo.png") 50% 50% / 460px no-repeat;
  opacity: .06;
}
footer::before { opacity: .14; }
.hero h1 { font-size: 2.6rem; color: var(--dark); letter-spacing: 1px; }
.hero .slogan { margin-top: 6px; font-size: 1.25rem; font-weight: 700; color: var(--primary); }
.hero .decode { margin-top: 4px; color: var(--muted); font-size: .95rem; font-style: italic; }
.hero p.body { max-width: 640px; margin: 18px auto 26px; color: var(--muted); font-size: .9rem; line-height: 1.45; }
.btn {
  display: inline-block; background: var(--primary); color: #fff; font-weight: 700;
  padding: 13px 30px; border-radius: 999px; border: none; cursor: pointer; font-size: 1rem;
}
.btn:hover { background: #1F66D6; }
.btn.ghost { background: transparent; color: var(--primary); border: 2px solid var(--primary); }

/* Trust bar */
.trust { max-width: 1100px; margin: 26px auto 0; padding: 0 20px; display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; }
.trust span {
  background: var(--card); border: 1px solid #E3EDF9; border-radius: 999px;
  padding: 8px 16px; font-size: .85rem; font-weight: 600; color: var(--dark);
}

/* Sections */
section { max-width: 1100px; margin: 0 auto; padding: 56px 20px; }
section h2 { text-align: center; font-size: 1.7rem; color: var(--dark); margin-bottom: 8px; }
section .sub { text-align: center; color: var(--muted); margin-bottom: 32px; }

/* Category grid */
.grid4 { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 18px; }
.cat-card {
  background: var(--card); border: 1px solid #E3EDF9; border-radius: var(--radius);
  padding: 26px 22px; transition: transform .15s ease, box-shadow .15s ease; display: block;
}
.cat-card:hover { transform: translateY(-3px); box-shadow: 0 10px 26px rgba(46,124,246,.12); }
.cat-card h3 { color: var(--dark); font-size: 1.15rem; }
.cat-card .zh { color: var(--primary); font-size: .85rem; font-weight: 700; }
.cat-card p { margin-top: 8px; color: var(--muted); font-size: .92rem; }

/* Product grid */
.grid3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 18px; }
.product {
  background: var(--card); border: 1px solid #E3EDF9; border-radius: var(--radius); overflow: hidden;
  display: flex; flex-direction: column;
}
.thumb {
  height: 150px; display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, #DCEBFF, #F0F7FF); color: #7FA9E8; font-size: 2.2rem;
}
.product .info { padding: 16px 18px 18px; display: flex; flex-direction: column; gap: 6px; flex: 1; }
.product h3 { font-size: 1.02rem; color: var(--dark); }
.product p { color: var(--muted); font-size: .88rem; flex: 1; }
.product .cta-row { display: flex; gap: 10px; align-items: center; margin-top: 8px; }
.product .price { font-weight: 800; color: var(--dark); }
.product .cta-row a { font-size: .85rem; font-weight: 700; }
.soon { font-size: .75rem; color: #9AA9BC; }

/* Promise */
.promise { background: var(--dark); color: #EAF3FF; border-radius: var(--radius); padding: 40px 30px; }
.promise h2 { color: #fff; }
.promise .sub { color: #A9C4E8; }
.promise ul { list-style: none; display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 14px; margin-top: 10px; }
.promise li { background: rgba(255,255,255,.06); border-radius: 10px; padding: 16px 18px; font-size: .95rem; }
.promise li b { color: #fff; display: block; margin-bottom: 4px; }

/* About teaser / page prose */
.prose { max-width: 760px; margin: 0 auto; }
.prose h2 { text-align: left; }
.prose h3 { color: var(--dark); margin: 22px 0 8px; }
.prose p { margin-bottom: 14px; color: var(--muted); }
.prose .lead { color: var(--text); font-weight: 600; }

/* Forms */
.signup { background: #EAF3FF; border-radius: var(--radius); padding: 36px 24px; text-align: center; }
.signup form { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; margin-top: 16px; }
.signup input[type=email] {
  padding: 12px 16px; border: 1px solid #C7DBF7; border-radius: 999px; min-width: 260px; font-size: 1rem;
}

/* Contact */
.contact-card { background: var(--card); border: 1px solid #E3EDF9; border-radius: var(--radius); padding: 30px; max-width: 640px; margin: 0 auto; }
.contact-card dl { display: grid; grid-template-columns: 130px 1fr; gap: 10px 14px; margin-top: 12px; }
.contact-card dt { font-weight: 700; color: var(--dark); }
.contact-card dd { color: var(--muted); }

/* Footer */
footer { background: var(--dark); color: #9FB6D4; margin-top: 40px; }
.foot {
  max-width: 1100px; margin: 0 auto; padding: 34px 20px;
  display: flex; flex-wrap: wrap; gap: 22px; justify-content: space-between;
}
.foot .brand { color: #fff; font-weight: 800; font-size: 1.2rem; }
.foot .slogan { font-size: .9rem; margin-top: 4px; }
.foot ul { list-style: none; display: flex; gap: 16px; flex-wrap: wrap; font-size: .88rem; }
.foot .foot-brand { flex: 1 1 240px; }
.foot .foot-links { flex: 1 1 auto; display: flex; flex-direction: column; gap: 10px; }
.foot .foot-policy ul { font-size: .78rem; gap: 12px; letter-spacing: 0; }
.foot .foot-cats ul { font-size: .78rem; gap: 12px; letter-spacing: 0; }
.foot a { color: #9FB6D4; }
.foot a:hover { color: #fff; }
.foot .legal { width: 100%; border-top: 1px solid rgba(255,255,255,.12); padding-top: 14px; font-size: .8rem; }

.note { text-align: center; color: #9AA9BC; font-size: .8rem; margin-top: 14px; }