/* ============================================================
   长颈鹿陪伴 · 官网样式
   品牌规范：暖黄 #F5B400 / #D89800 · 奶白 #FFFBF0 · 暖棕 #8B6914
   杂志式手账排版：米白底 + 黄竖条 + 华文行楷标题 + 撕纸胶带
   禁用紫色
   ============================================================ */

:root {
  --brand-yellow: #F5B400;
  --brand-yellow-deep: #D89800;
  --brand-cream: #FFFBF0;
  --brand-brown: #8B6914;
  --brand-brown-light: #A68B3C;
  --paper: #FFFBF0;
  --paper-dark: #F7EED8;
  --ink: #4A3B10;
  --ink-soft: #7A6A3A;
  --tape: rgba(245, 180, 0, 0.35);
  --card-shadow: 0 4px 18px rgba(139, 105, 20, 0.10);
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--paper);
  color: var(--ink);
  font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
  font-size: 16px;
  line-height: 1.85;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, .xingkai {
  font-family: "STXingkai", "华文行楷", "KaiTi", "楷体", serif;
  font-weight: 400;
}

a { color: var(--brand-brown); text-decoration: none; }
a:hover { color: var(--brand-yellow-deep); }

.container { max-width: 1080px; margin: 0 auto; padding: 0 24px; }

/* ---------- 顶部导航 ---------- */
.nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255, 251, 240, 0.96);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid rgba(139, 105, 20, 0.12);
}
.nav-inner {
  max-width: 1080px; margin: 0 auto; padding: 14px 24px;
  display: flex; align-items: center; justify-content: space-between;
}
.logo {
  display: flex; align-items: center; gap: 10px;
  font-family: "STXingkai", "华文行楷", "KaiTi", serif;
  font-size: 26px; color: var(--brand-brown);
}
.logo .giraffe-mark {
  width: 34px; height: 34px; border-radius: 50%;
  background: var(--brand-yellow);
  display: inline-flex; align-items: center; justify-content: center;
  color: #fff; font-size: 20px;
  box-shadow: 0 2px 8px rgba(245, 180, 0, 0.4);
}
.nav-links { display: flex; gap: 28px; font-size: 15px; }
.nav-links a { color: var(--ink-soft); padding: 4px 2px; border-bottom: 2px solid transparent; }
.nav-links a:hover, .nav-links a.active { color: var(--brand-brown); border-bottom-color: var(--brand-yellow); }
.nav-cta {
  background: var(--brand-yellow); color: #fff !important;
  padding: 8px 18px; border-radius: 999px; font-size: 14px;
  border: none;
}
.nav-cta:hover { background: var(--brand-yellow-deep); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  background: linear-gradient(160deg, #FFF9E8 0%, #FFFBF0 55%, #FDF3DC 100%);
  padding: 88px 0 96px;
  overflow: hidden;
}
.hero::before {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0;
  width: 10px; background: var(--brand-yellow);
}
.hero-inner { max-width: 1080px; margin: 0 auto; padding: 0 24px; position: relative; }
.hero-tag {
  display: inline-block; background: var(--brand-yellow); color: #fff;
  font-size: 13px; letter-spacing: 4px;
  padding: 5px 18px; border-radius: 999px; margin-bottom: 26px;
}
.hero h1 {
  font-size: 56px; line-height: 1.35; color: var(--brand-brown);
  margin-bottom: 18px;
}
.hero h1 .accent { color: var(--brand-yellow-deep); }
.hero p.lead {
  font-size: 19px; color: var(--ink-soft); max-width: 620px; margin-bottom: 38px;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.btn {
  display: inline-block; padding: 13px 34px; border-radius: 999px;
  font-size: 16px; transition: all .2s;
}
.btn-primary { background: var(--brand-yellow); color: #fff; box-shadow: 0 4px 14px rgba(245,180,0,.35); }
.btn-primary:hover { background: var(--brand-yellow-deep); color: #fff; transform: translateY(-1px); }
.btn-ghost { border: 1.5px solid var(--brand-brown-light); color: var(--brand-brown); }
.btn-ghost:hover { background: rgba(245,180,0,.08); }

.hero-stats {
  display: flex; gap: 48px; margin-top: 56px; flex-wrap: wrap;
}
.hero-stats .stat b { font-size: 30px; color: var(--brand-brown); font-weight: 600; }
.hero-stats .stat span { display: block; font-size: 13px; color: var(--ink-soft); letter-spacing: 1px; }

/* ---------- 通用区块 ---------- */
.section { padding: 76px 0; }
.section.alt { background: var(--paper-dark); }
.sec-head { text-align: center; margin-bottom: 52px; }
.sec-head .sec-tag {
  display: inline-block; font-size: 13px; letter-spacing: 6px;
  color: var(--brand-yellow-deep); margin-bottom: 10px;
}
.sec-head h2 { font-size: 38px; color: var(--brand-brown); }
.sec-head .sec-sub { color: var(--ink-soft); margin-top: 8px; font-size: 15px; }

/* 黄竖条标题（杂志式） */
.bar-title { display: flex; align-items: center; gap: 12px; margin-bottom: 22px; }
.bar-title::before { content: ""; width: 6px; height: 30px; background: var(--brand-yellow); border-radius: 3px; }
.bar-title h3 { font-size: 26px; color: var(--brand-brown); }

/* ---------- 卡片 ---------- */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 22px; }
.card {
  background: #fff; border-radius: 14px; padding: 30px 26px;
  box-shadow: var(--card-shadow); border-top: 4px solid var(--brand-yellow);
  position: relative;
}
.card .card-icon {
  width: 48px; height: 48px; border-radius: 12px;
  background: linear-gradient(140deg, #FFE9A8, #FFD966);
  display: flex; align-items: center; justify-content: center;
  font-size: 24px; margin-bottom: 16px;
}
.card h4 { font-size: 19px; color: var(--brand-brown); margin-bottom: 8px; font-weight: 600; }
.card p { font-size: 14px; color: var(--ink-soft); }

/* ---------- 流程 ---------- */
.steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 18px; counter-reset: step; }
.step {
  background: #fff; border-radius: 14px; padding: 26px 20px;
  box-shadow: var(--card-shadow); text-align: center; position: relative;
}
.step::before {
  counter-increment: step; content: counter(step);
  position: absolute; top: -14px; left: 50%; transform: translateX(-50%);
  width: 30px; height: 30px; border-radius: 50%;
  background: var(--brand-yellow); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 15px; font-weight: 600;
}
.step h4 { font-size: 17px; color: var(--brand-brown); margin: 10px 0 6px; font-weight: 600; }
.step p { font-size: 13px; color: var(--ink-soft); }

/* ---------- 撕纸胶带 ---------- */
.tape {
  position: absolute; width: 96px; height: 26px;
  background: var(--tape); transform: rotate(-4deg);
  border-left: 1px dashed rgba(216, 152, 0, .35);
  border-right: 1px dashed rgba(216, 152, 0, .35);
  top: -12px; left: 50%; margin-left: -48px;
}

/* ---------- 人群区块 ---------- */
.crowd { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 20px; }
.crowd-item {
  background: #fff; border-radius: 14px; padding: 26px 24px;
  border-left: 5px solid var(--brand-yellow);
  box-shadow: var(--card-shadow);
}
.crowd-item b { display: block; font-size: 17px; color: var(--brand-brown); margin-bottom: 6px; }
.crowd-item span { font-size: 14px; color: var(--ink-soft); }

/* ---------- 城市 ---------- */
.city-tags { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; }
.city-tag {
  background: #fff; border: 1.5px dashed var(--brand-yellow);
  color: var(--brand-brown); font-size: 15px;
  padding: 8px 22px; border-radius: 999px;
}

/* ---------- CTA 大区块 ---------- */
.cta-band {
  background: linear-gradient(140deg, #F5B400, #E0A300);
  border-radius: 20px; padding: 56px 40px; text-align: center;
  color: #fff; position: relative; overflow: hidden;
}
.cta-band h2 { font-size: 34px; margin-bottom: 10px; }
.cta-band p { opacity: .92; margin-bottom: 28px; font-size: 15px; }
.cta-band .btn { background: #fff; color: var(--brand-brown); font-weight: 600; }
.cta-band .btn:hover { transform: translateY(-2px); box-shadow: 0 6px 18px rgba(0,0,0,.15); }

/* ---------- 协议/文档页 ---------- */
.doc-page { padding: 56px 0 80px; }
.doc-card {
  background: #fff; border-radius: 16px; padding: 48px 52px;
  box-shadow: var(--card-shadow); position: relative;
}
.doc-card h1 { font-size: 32px; color: var(--brand-brown); margin-bottom: 6px; }
.doc-meta { font-size: 13px; color: var(--ink-soft); margin-bottom: 30px; }
.doc-card h2 {
  font-size: 21px; color: var(--brand-brown); margin: 30px 0 10px;
  padding-left: 12px; border-left: 4px solid var(--brand-yellow);
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif; font-weight: 600;
}
.doc-card p, .doc-card li { font-size: 15px; color: var(--ink); margin-bottom: 8px; }
.doc-card ul { padding-left: 22px; }
.doc-card .placeholder {
  background: #FFF3C4; border-radius: 4px; padding: 0 6px;
  color: var(--brand-brown); font-weight: 600;
}
/* 页脚等处的占位标记（上线前替换） */
.placeholder-mark {
  background: rgba(245, 180, 0, .22); border-radius: 4px; padding: 0 5px;
  color: #FFD966;
}
footer .placeholder-mark { color: #FFE9A8; }

/* ---------- 页脚 ---------- */
footer {
  background: #4A3B10; color: #D8C89A;
  padding: 44px 0 30px; font-size: 13px;
}
.footer-inner {
  max-width: 1080px; margin: 0 auto; padding: 0 24px;
  display: flex; justify-content: space-between; gap: 32px; flex-wrap: wrap;
}
.footer-brand .logo { color: #FFD966; font-size: 22px; margin-bottom: 8px; }
.footer-brand p { max-width: 320px; line-height: 1.9; }
.footer-links { display: flex; flex-direction: column; gap: 8px; }
.footer-links a { color: #D8C89A; }
.footer-links a:hover { color: #FFD966; }
.footer-bottom {
  max-width: 1080px; margin: 30px auto 0; padding: 18px 24px 0;
  border-top: 1px solid rgba(216, 200, 154, .25);
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px;
  font-size: 12px; color: #B3A375;
}
.footer-bottom .beian { color: #D8C89A; }

/* ---------- 响应式 ---------- */
@media (max-width: 720px) {
  .hero h1 { font-size: 38px; }
  .nav-links { display: none; }
  .doc-card { padding: 30px 22px; }
  .hero { padding: 56px 0 64px; }
  .section { padding: 52px 0; }
}