/* 观象堂官网 · 玄青 × 宣纸 × 暖金/朱砂 */
:root {
  --ink: #16283C;
  --ink-deep: #0F1B2A;
  --paper: #F7F2E8;
  --paper-2: #EFE7D5;
  --gold: #B8894B;
  --gold-soft: #D8BC8A;
  --cinnabar: #B03A2A;
  --text: #2E2C27;
  --muted: #7A7263;
  --line: #DDD2BB;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--paper);
  color: var(--text);
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.9;
  -webkit-font-smoothing: antialiased;
}
.serif { font-family: "Songti SC", "STSong", "SimSun", serif; }
a { color: var(--gold); text-decoration: none; }
a:hover { color: var(--cinnabar); }
.wrap { max-width: 960px; margin: 0 auto; padding: 0 24px; }

/* 导航 */
nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(247,242,232,.94);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
nav .wrap { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); }
.brand .seal {
  display: inline-flex; align-items: center; justify-content: center;
  width: 30px; height: 30px; border: 1.5px solid var(--cinnabar);
  color: var(--cinnabar); font-size: 15px; border-radius: 4px;
}
.brand b { font-size: 19px; letter-spacing: 3px; font-weight: 600; }
.brand small { color: var(--muted); font-size: 11px; letter-spacing: 1px; margin-left: 2px; }
nav .links { display: flex; gap: 26px; }
nav .links a { color: var(--text); font-size: 14.5px; letter-spacing: 1px; }
nav .links a.on, nav .links a:hover { color: var(--cinnabar); }

/* 首屏 */
.hero {
  background: var(--ink);
  color: var(--paper);
  text-align: center;
  padding: 110px 24px 96px;
}
.hero .eyebrow { color: var(--gold-soft); font-size: 14px; letter-spacing: 6px; margin-bottom: 26px; }
.hero h1 { font-size: 68px; letter-spacing: 12px; font-weight: 500; color: var(--paper); margin-bottom: 30px; }
.hero .sub { max-width: 640px; margin: 0 auto; color: rgba(247,242,232,.82); font-size: 17px; }
.hero .sub b { color: var(--gold-soft); font-weight: 500; }
.hero .cta { margin-top: 44px; display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.hero .note { margin-top: 36px; color: rgba(247,242,232,.45); font-size: 12.5px; letter-spacing: 1px; }

.btn {
  display: inline-block; padding: 13px 34px;
  border: 1px solid var(--gold); border-radius: 6px;
  font-size: 15px; letter-spacing: 2px; transition: all .2s;
}
.btn.solid { background: var(--gold); color: var(--ink-deep); }
.btn.solid:hover { background: var(--gold-soft); color: var(--ink-deep); }
.btn.ghost { background: transparent; color: var(--gold-soft); }
.btn.ghost:hover { border-color: var(--gold-soft); color: var(--paper); }

/* 区块 */
section { padding: 84px 0; }
section.alt { background: var(--paper-2); }
section.dark { background: var(--ink); color: var(--paper); }
.kicker { color: var(--cinnabar); font-size: 13px; letter-spacing: 4px; margin-bottom: 14px; }
section.dark .kicker { color: var(--gold-soft); }
h2 { font-size: 34px; letter-spacing: 4px; font-weight: 500; color: var(--ink); margin-bottom: 26px; }
section.dark h2 { color: var(--paper); }
section p.lead { max-width: 720px; font-size: 16.5px; color: var(--text); }
section.dark p { color: rgba(247,242,232,.82); }
.center { text-align: center; }
.center p.lead { margin: 0 auto; }

/* 双产品卡片 */
.two { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; margin-top: 40px; }
.card {
  background: #FDFBF5; border: 1px solid var(--line); border-radius: 10px;
  padding: 36px 32px; transition: box-shadow .2s, transform .2s;
}
.card:hover { box-shadow: 0 10px 30px rgba(22,40,60,.08); transform: translateY(-2px); }
.card .tag { display: inline-block; font-size: 12px; letter-spacing: 2px; color: var(--gold); border: 1px solid var(--gold); border-radius: 999px; padding: 3px 14px; margin-bottom: 18px; }
.card h3 { font-size: 23px; letter-spacing: 2px; color: var(--ink); font-weight: 600; margin-bottom: 12px; }
.card p { color: var(--muted); font-size: 15px; margin-bottom: 22px; }
.card .go { font-size: 15px; letter-spacing: 1px; }

/* 三步方法论 */
.steps3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin-top: 40px; }
.steps3 .s { text-align: center; padding: 30px 20px; border-top: 2px solid var(--gold); }
.steps3 .s .no { color: var(--cinnabar); font-size: 13px; letter-spacing: 3px; }
.steps3 .s h4 { font-size: 24px; letter-spacing: 6px; color: var(--ink); margin: 12px 0 10px; font-weight: 600; }
.steps3 .s p { color: var(--muted); font-size: 14.5px; }

/* 引文带 */
.quote { text-align: center; }
.quote .q { font-size: 26px; letter-spacing: 3px; color: var(--paper); line-height: 2; }
.quote .q i { color: var(--cinnabar); font-style: normal; }
.quote .src { margin-top: 16px; color: var(--gold-soft); font-size: 14px; letter-spacing: 2px; }
.quote .note2 { margin-top: 26px; color: rgba(247,242,232,.55); font-size: 13.5px; }

/* 功能卡片（产品页） */
.grid3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 36px; }
.grid3 .f { background: #FDFBF5; border: 1px solid var(--line); border-radius: 10px; padding: 24px 22px; }
.grid3 .f b { display: block; color: var(--ink); font-size: 16.5px; letter-spacing: 1px; margin-bottom: 8px; font-weight: 600; }
.grid3 .f b::before { content: "◆ "; color: var(--gold); font-size: 13px; }
.grid3 .f p { color: var(--muted); font-size: 14px; }

/* 价值点 */
.points { margin-top: 30px; }
.points li { list-style: none; padding: 16px 0; border-bottom: 1px dashed var(--line); display: flex; gap: 14px; }
.points li b { color: var(--cinnabar); font-size: 16px; letter-spacing: 2px; white-space: nowrap; }
.points li span { color: var(--text); font-size: 15px; }

/* 声明 */
.disclaimer {
  margin-top: 44px; padding: 20px 24px;
  border: 1px solid var(--line); border-left: 3px solid var(--cinnabar);
  border-radius: 6px; background: #FDFBF5;
  color: var(--muted); font-size: 13.5px; line-height: 1.9;
}

/* 结尾 CTA */
.finalCta { text-align: center; }
.finalCta h2 { margin-bottom: 14px; }
.finalCta p { color: var(--muted); margin-bottom: 32px; }

/* 联系卡 */
.contactBox { display: grid; grid-template-columns: 1fr 240px; gap: 40px; align-items: start; margin-top: 36px; }
.contactBox .qr { text-align: center; }
.contactBox .qr img { width: 220px; border: 1px solid var(--line); border-radius: 8px; background: #fff; padding: 10px; }
.contactBox .qr span { display: block; margin-top: 10px; color: var(--muted); font-size: 13px; }
.contactList { padding: 0; }
.contactList li { list-style: none; padding: 18px 0; border-bottom: 1px dashed var(--line); }
.contactList .k { color: var(--cinnabar); font-size: 13px; letter-spacing: 3px; margin-bottom: 4px; }
.contactList .v { font-size: 17px; color: var(--ink); }

/* 页脚 */
footer { background: var(--ink-deep); color: rgba(247,242,232,.7); padding: 56px 0 40px; }
footer .top { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 24px; padding-bottom: 28px; border-bottom: 1px solid rgba(247,242,232,.12); }
footer .fb b { display: block; font-size: 18px; letter-spacing: 3px; color: var(--paper); margin-bottom: 8px; }
footer .fb span { font-size: 13px; color: rgba(247,242,232,.55); }
footer .fl { font-size: 13.5px; line-height: 2.2; }
footer .fl a { color: var(--gold-soft); }
footer .bottom { padding-top: 22px; font-size: 12px; color: rgba(247,242,232,.4); display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; }

/* 页头（子页） */
.pageHero { background: var(--ink); color: var(--paper); padding: 76px 24px 64px; text-align: center; }
.pageHero .tag { display: inline-block; font-size: 12.5px; letter-spacing: 3px; color: var(--gold-soft); border: 1px solid rgba(216,188,138,.5); border-radius: 999px; padding: 4px 16px; margin-bottom: 20px; }
.pageHero h1 { font-size: 44px; letter-spacing: 6px; font-weight: 500; margin-bottom: 18px; }
.pageHero p { max-width: 660px; margin: 0 auto; color: rgba(247,242,232,.78); font-size: 16px; }

/* 理念页段落 */
.prose p { margin-bottom: 22px; max-width: 760px; }
.prose h3 { font-size: 21px; letter-spacing: 3px; color: var(--cinnabar); margin: 40px 0 14px; font-weight: 600; }

@media (max-width: 760px) {
  .hero h1 { font-size: 44px; letter-spacing: 8px; }
  .two, .grid3, .steps3, .contactBox { grid-template-columns: 1fr; }
  nav .links { gap: 14px; }
  nav .links a { font-size: 13px; }
  .brand small { display: none; }
  h2 { font-size: 27px; }
  section { padding: 60px 0; }
}