/* ============================================================
   LIZARD 中国官网 — 全局样式
   品牌色：#004646 / #d28c1e / #6e0000 / #f0f0e6 / #727171
   设计原则：深色底子，金绿灵魂，文字即内容
   ============================================================ */

/* ── CSS 变量 ─────────────────────────────────────────── */
:root {
  --green-deep:    #004646;
  --green-darker:  #002b2b;
  --green-card:    #0a3a3a;
  --gold:          #d28c1e;
  --gold-light:    #e8b840;
  --burgundy:      #6e0000;
  --warm-white:    #f0f0e6;
  --gray-cool:     #727171;
  --gray-border:   #3a5a5a;
  --font-heading:  Georgia, 'Noto Serif SC', 'Songti SC', serif;
  --font-body:     -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
  --max-width:     1100px;
  --nav-height:    64px;
}

/* ── Reset ─────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-body);
  background: var(--green-deep);
  color: var(--warm-white);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--gold); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--gold-light); }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }

/* ── 排版 ──────────────────────────────────────────────── */
h1, h2, h3, h4 { font-family: var(--font-heading); font-weight: 700; line-height: 1.3; }
h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.5rem, 3.5vw, 2.2rem); }
h3 { font-size: clamp(1.1rem, 2.5vw, 1.5rem); }
p { margin-bottom: 1rem; }

/* ── 工具类 ────────────────────────────────────────────── */
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 1.5rem; }
.section { padding: 5rem 0; }
.section-title {
  text-align: center;
  margin-bottom: 3rem;
  color: var(--gold);
  position: relative;
}
.section-title::after {
  content: '';
  display: block;
  width: 60px;
  height: 2px;
  background: var(--gold);
  margin: 0.8rem auto 0;
}
.text-gold   { color: var(--gold); }
.text-gray   { color: var(--gray-cool); }
.text-center { text-align: center; }

/* ── 按钮 ──────────────────────────────────────────────── */
.btn {
  display: inline-block;
  padding: 0.75rem 2rem;
  border: 2px solid var(--gold);
  color: var(--gold);
  font-family: var(--font-body);
  font-size: 0.95rem;
  letter-spacing: 0.05em;
  cursor: pointer;
  transition: all 0.3s;
  text-transform: uppercase;
  background: transparent;
}
.btn:hover { background: var(--gold); color: var(--green-darker); }
.btn-solid { background: var(--gold); color: var(--green-darker); }
.btn-solid:hover { background: var(--gold-light); }

/* ── 导航栏 ────────────────────────────────────────────── */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  height: var(--nav-height);
  background: var(--green-darker);
  border-bottom: 1px solid var(--gray-border);
  backdrop-filter: blur(10px);
}
.nav .container { display: flex; align-items: center; justify-content: space-between; height: 100%; }
.nav-logo {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  color: var(--gold);
  letter-spacing: 0.08em;
}
.nav-logo span { color: var(--warm-white); font-size: 0.75rem; margin-left: 0.5rem; }
.nav-links { display: flex; gap: 2rem; }
.nav-links a {
  color: var(--warm-white);
  font-size: 0.9rem;
  letter-spacing: 0.04em;
  padding: 0.25rem 0;
  border-bottom: 1px solid transparent;
  transition: all 0.2s;
}
.nav-links a:hover { color: var(--gold); border-bottom-color: var(--gold); }
.nav-links a.active { color: var(--gold); border-bottom-color: var(--gold); }
.nav-toggle {
  display: none;
  flex-direction: column; gap: 5px;
  cursor: pointer;
  background: none; border: none;
  padding: 4px;
}
.nav-toggle span {
  display: block;
  width: 24px; height: 2px;
  background: var(--warm-white);
  transition: all 0.3s;
}

/* ── 英雄区 ────────────────────────────────────────────── */
.hero {
  min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  text-align: center;
  background: var(--green-darker);
  position: relative;
  overflow: hidden;
  padding-top: var(--nav-height);
}
.hero::before {
  content: '';
  position: absolute;
  top: -50%; left: -50%;
  width: 200%; height: 200%;
  background: radial-gradient(ellipse at center, rgba(0,70,70,0.4) 0%, transparent 60%);
  animation: heroGlow 8s ease-in-out infinite;
}
@keyframes heroGlow {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(2%, -2%); }
}
.hero-content { position: relative; z-index: 1; }
.hero-tag {
  display: inline-block;
  font-size: 0.8rem;
  letter-spacing: 0.25em;
  color: var(--gold);
  border: 1px solid var(--gold);
  padding: 0.35rem 1.2rem;
  margin-bottom: 2rem;
  text-transform: uppercase;
}
.hero h1 {
  font-size: clamp(2.5rem, 7vw, 5rem);
  color: var(--warm-white);
  margin-bottom: 1rem;
  letter-spacing: 0.04em;
}
.hero h1 .gold { color: var(--gold); }
.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.3rem);
  color: var(--gray-cool);
  max-width: 600px;
  margin: 0 auto 2.5rem;
}
.hero-cta { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

/* ── 滚动提示箭头 ──────────────────────────────────────── */
.scroll-hint {
  position: absolute; bottom: 2rem; left: 50%;
  transform: translateX(-50%);
  animation: bounce 2s infinite;
}
.scroll-hint svg { stroke: var(--gold); }
@keyframes bounce {
  0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
  40% { transform: translateX(-50%) translateY(-10px); }
  60% { transform: translateX(-50%) translateY(-5px); }
}

/* ── 模块卡片网格 ──────────────────────────────────────── */
.modules { background: var(--green-deep); }
.module-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 2rem;
}
.module-card {
  background: var(--green-card);
  border: 1px solid var(--gray-border);
  padding: 2.5rem 2rem;
  text-align: center;
  transition: transform 0.3s, border-color 0.3s;
  cursor: pointer;
}
.module-card:hover {
  transform: translateY(-4px);
  border-color: var(--gold);
}
.module-card .card-icon {
  font-size: 2.5rem;
  margin-bottom: 1.2rem;
  display: block;
}
.module-card h3 { color: var(--gold); margin-bottom: 0.8rem; }
.module-card p { color: var(--gray-cool); font-size: 0.95rem; margin-bottom: 1.2rem; }
.module-card .card-link {
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* ── 即将上线标签 ──────────────────────────────────────── */
.badge-soon {
  display: inline-block;
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--burgundy);
  border: 1px solid var(--burgundy);
  padding: 0.2rem 0.6rem;
  margin-top: 0.5rem;
  text-transform: uppercase;
}

/* ── 页脚 ──────────────────────────────────────────────── */
.footer {
  background: var(--green-darker);
  border-top: 1px solid var(--gray-border);
  padding: 3rem 0;
  text-align: center;
}
.footer-logo { font-family: var(--font-heading); font-size: 1.5rem; color: var(--gold); margin-bottom: 0.5rem; }
.footer p { color: var(--gray-cool); font-size: 0.85rem; margin-bottom: 0.3rem; }

/* ── 内容页通用样式 ────────────────────────────────────── */
.content-page { padding-top: clamp(5.5rem, calc(var(--nav-height) + 7vw), 11rem); padding-bottom: 3rem; }
.content-page h1 { color: var(--gold); margin-bottom: 2rem; }
.content-page .prose { max-width: 800px; }
.content-page .prose h2 { color: var(--gold); margin: 2.5rem 0 1rem; font-size: 1.4rem; }
.content-page .prose h3 { color: var(--warm-white); margin: 1.5rem 0 0.8rem; }
.content-page .prose ul { list-style: disc; padding-left: 1.5rem; margin-bottom: 1rem; }
.content-page .prose li { margin-bottom: 0.5rem; color: var(--gray-cool); }
.placeholder-note {
  background: var(--green-card);
  border-left: 3px solid var(--gold);
  padding: 1rem 1.5rem;
  margin: 1.5rem 0;
  color: var(--gray-cool);
  font-size: 0.9rem;
  font-style: italic;
}

/* ── 内容页图片 ────────────────────────────────────────── */
.prose-img-right {
  float: right;
  max-width: 280px;
  margin: 0.5rem 0 1.5rem 2rem;
  border-radius: 4px;
  border: 1px solid var(--gray-border);
}
.prose-img-full {
  display: block;
  max-width: 100%;
  margin: 2rem auto;
  border-radius: 4px;
}
.prose-img-row {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  justify-content: center;
  margin: 2rem 0;
  clear: both;
}
.prose-img-row img {
  max-height: 320px;
  border-radius: 4px;
  border: 1px solid var(--gray-border);
}

/* ── 移动端响应式 ──────────────────────────────────────── */
@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: var(--nav-height); left: 0; right: 0; bottom: 0;
    background: var(--green-darker);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    transform: translateX(100%);
    transition: transform 0.3s ease;
    z-index: 999;
  }
  .nav-links.active { transform: translateX(0); }
  .nav-links a { font-size: 1.2rem; }
  .nav-toggle { display: flex; }

  .section { padding: 3rem 0; }
  .module-grid { grid-template-columns: 1fr; gap: 1.5rem; }
  .hero { min-height: 90vh; }

  .prose-img-right {
    float: none;
    display: block;
    max-width: 100%;
    margin: 1.5rem auto;
  }
  .prose-img-row { flex-direction: column; align-items: center; }
  .prose-img-row img { max-height: none; max-width: 100%; }
}