/* ============================================================
   中熙知航 · 产品官网样式
   品牌：广东中熙文化科技有限公司 · 橘猫博士 IP
   配色依据 docs/ip-spec.md（禁止改主体配色）
   ============================================================ */

/* Tailwind CSS CDN */
@import url('https://cdn.jsdelivr.net/npm/tailwindcss@2.2.19/dist/tailwind.min.css');
/* 字体：Baloo 2（拉丁/数字展示）+ Noto Sans SC（中文正文） */
@import url('https://fonts.googleapis.com/css2?family=Baloo+2:wght@500;600;700;800&family=Noto+Sans+SC:wght@400;500;700;900&display=swap');

/* ---------- 设计令牌 ---------- */
:root {
  --brand-orange: #F5A25E;      /* 主色橙：橘猫主色 */
  --brand-orange-deep: #E88B3C; /* 深橙：CTA 悬停 */
  --brand-brown: #7A5230;       /* 辅色棕：文字 / 包边 */
  --brand-cream: #FAF3E8;       /* 背景米 */
  --brand-pink: #FFB6C1;        /* 点缀粉 */
  --ink: #3D2B1F;               /* 主文字色（对比度 ≥ 4.5:1） */
  --ink-soft: #6E5643;          /* 次级文字色 */
  --paper: #FFFDF8;             /* 卡片纸白 */
  --leaf: #16A34A;              /* 功能绿 */
  --alert: #DC2626;             /* 功能红 */

  --radius-lg: 24px;
  --radius-md: 16px;
  --shadow-soft: 0 10px 30px -12px rgba(122, 82, 48, 0.25);
  --shadow-lift: 0 20px 45px -18px rgba(122, 82, 48, 0.38);
  --font-display: 'Baloo 2', 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-body: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  color: var(--ink);
  background-color: var(--brand-cream);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

::selection { background: var(--brand-orange); color: #fff; }

/* ---------- 排版 ---------- */
.font-display { font-family: var(--font-display); }

.h-display {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: 0.01em;
  color: var(--ink);
}

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: 999px;
  background: #fff;
  border: 1.5px solid rgba(245, 162, 94, 0.55);
  color: var(--brand-brown);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.lead { font-size: 17px; color: var(--ink-soft); max-width: 40em; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 48px;
  padding: 12px 28px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 16px;
  cursor: pointer;
  transition: background-color .2s ease, color .2s ease, box-shadow .2s ease, transform .2s ease, border-color .2s ease;
}
.btn:focus-visible { outline: 3px solid rgba(245, 162, 94, .6); outline-offset: 2px; }

.btn-primary {
  background: var(--brand-orange);
  color: #fff;
  box-shadow: 0 12px 26px -10px rgba(245, 162, 94, .8);
}
.btn-primary:hover { background: var(--brand-orange-deep); box-shadow: 0 16px 30px -10px rgba(232, 139, 60, .85); }

.btn-outline {
  background: transparent;
  color: var(--brand-brown);
  border: 2px solid var(--brand-brown);
}
.btn-outline:hover { background: var(--brand-brown); color: var(--brand-cream); }

.btn-ghost-light {
  background: rgba(255, 255, 255, .12);
  color: #FFF6EA;
  border: 2px solid rgba(255, 246, 234, .5);
}
.btn-ghost-light:hover { background: rgba(255, 255, 255, .22); }

/* ---------- 卡片 ---------- */
.card {
  background: var(--paper);
  border: 1.5px solid rgba(122, 82, 48, .12);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
  transition: box-shadow .25s ease, transform .25s ease, border-color .25s ease;
}
.card:hover { box-shadow: var(--shadow-lift); transform: translateY(-4px); border-color: rgba(245, 162, 94, .45); }

.icon-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: linear-gradient(135deg, #FCE9D4, #F5A25E);
  color: #7A5230;
  flex-shrink: 0;
}

/* ---------- Hero 装饰 ---------- */
.hero-bg {
  background:
    radial-gradient(48rem 26rem at 88% -10%, rgba(255, 182, 193, .35), transparent 62%),
    radial-gradient(40rem 24rem at -6% 18%, rgba(245, 162, 94, .22), transparent 60%),
    linear-gradient(180deg, #FAF3E8 0%, #FFFDF8 100%);
}

.float-slow { animation: floaty 6s ease-in-out infinite; }
.float-slower { animation: floaty 8.5s ease-in-out infinite reverse; }
@keyframes floaty {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-14px); }
}

.blob {
  position: absolute;
  border-radius: 9999px;
  filter: blur(0.5px);
  pointer-events: none;
}

/* ---------- 小程序模拟卡片 ---------- */
.mock-screen {
  background: #fff;
  border-radius: var(--radius-md);
  border: 1.5px solid rgba(122, 82, 48, .14);
  box-shadow: var(--shadow-soft);
  overflow: hidden;
}
.mock-bar {
  height: 12px;
  background: linear-gradient(90deg, var(--brand-orange), #FBD3A9);
  border-radius: 999px;
}
.mock-star { color: var(--brand-orange); }
.mock-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 700;
  background: #FCE9D4;
  color: var(--brand-brown);
}
.mock-option {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: 12px;
  border: 1.5px solid rgba(122, 82, 48, .15);
  font-size: 14px;
  color: var(--ink-soft);
  background: #fff;
}
.mock-option.is-right {
  border-color: var(--brand-orange);
  background: #FDF0E2;
  color: var(--brand-brown);
  font-weight: 700;
}
.option-dot {
  width: 20px; height: 20px;
  border-radius: 999px;
  border: 2px solid rgba(122, 82, 48, .35);
  flex-shrink: 0;
  display: inline-flex; align-items: center; justify-content: center;
}
.is-right .option-dot { border-color: var(--brand-orange); background: var(--brand-orange); color: #fff; }

/* ---------- 深色板块（三端能力） ---------- */
.section-dark {
  background:
    radial-gradient(40rem 20rem at 110% 0%, rgba(245, 162, 94, .25), transparent 60%),
    linear-gradient(160deg, #4A3421 0%, #3D2B1F 100%);
  color: #F7EADB;
}
.section-dark .h-display, .section-dark h2, .section-dark h3 { color: #FFF6EA; }
.section-dark .lead { color: rgba(247, 234, 219, .82); }
.dark-card {
  background: rgba(255, 253, 248, .07);
  border: 1.5px solid rgba(255, 246, 234, .18);
  border-radius: var(--radius-lg);
  transition: background-color .25s ease, border-color .25s ease, transform .25s ease;
}
.dark-card:hover { background: rgba(255, 253, 248, .12); border-color: rgba(245, 162, 94, .6); transform: translateY(-4px); }

/* ---------- 数据亮点 ---------- */
.stat-number {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.5rem, 5vw, 3.75rem);
  line-height: 1.1;
  color: var(--brand-orange-deep);
}
.stat-label { color: var(--ink-soft); font-weight: 500; }

/* ---------- FAQ 手风琴（原生 details/summary，无 JS 可读） ---------- */
.faq-item {
  background: var(--paper);
  border: 1.5px solid rgba(122, 82, 48, .14);
  border-radius: var(--radius-md);
  transition: border-color .2s ease, box-shadow .2s ease;
}
.faq-item[open] { border-color: rgba(245, 162, 94, .6); box-shadow: var(--shadow-soft); }
.faq-item summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 22px;
  font-weight: 700;
  font-size: 16.5px;
  color: var(--ink);
  min-height: 44px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary:focus-visible { outline: 3px solid rgba(245, 162, 94, .6); outline-offset: 2px; border-radius: var(--radius-md); }
.faq-chevron {
  flex-shrink: 0;
  width: 32px; height: 32px;
  border-radius: 999px;
  display: inline-flex; align-items: center; justify-content: center;
  background: #FCE9D4;
  color: var(--brand-brown);
  transition: transform .2s ease;
}
.faq-item[open] .faq-chevron { transform: rotate(180deg); }
.faq-answer { padding: 0 22px 20px; color: var(--ink-soft); font-size: 15.5px; }
.faq-answer strong { color: var(--brand-brown); }

/* ---------- 导航 ---------- */
.site-nav { backdrop-filter: blur(10px); background: rgba(250, 243, 232, .86); border-bottom: 1.5px solid rgba(122, 82, 48, .1); }
.nav-link {
  color: var(--brand-brown);
  font-weight: 600;
  padding: 8px 4px;
  border-bottom: 2.5px solid transparent;
  transition: color .2s ease, border-color .2s ease;
}
.nav-link:hover { color: var(--brand-orange-deep); border-color: var(--brand-orange); }

/* ---------- 滚动渐入 ---------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s ease, transform .7s ease; }
.reveal.is-visible { opacity: 1; transform: none; }

/* ---------- 页脚 ---------- */
.site-footer { background: #3D2B1F; color: rgba(247, 234, 219, .8); }
.site-footer a { color: rgba(247, 234, 219, .8); transition: color .2s ease; }
.site-footer a:hover { color: var(--brand-orange); }

/* ---------- 无障碍与偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .float-slow, .float-slower { animation: none; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .card:hover, .dark-card:hover { transform: none; }
  * { transition-duration: .01ms !important; animation-duration: .01ms !important; }
}

/* 图片懒加载淡入 */
.img-fade { opacity: 0; transition: opacity .5s ease; }
.img-fade.is-loaded { opacity: 1; }

/* ---------- 小程序码交互：桌面端悬停放大 ---------- */
.qr-zoom { position: relative; }
.qr-zoom .qr-img {
  position: relative;
  z-index: 70;
  cursor: zoom-in;
  transition: transform .25s ease, box-shadow .25s ease;
}
/* 仅在支持悬停的精确指针设备（PC）生效，不影响触屏 */
@media (hover: hover) and (pointer: fine) {
  .qr-zoom:hover .qr-img {
    transform: scale(2.5);
    box-shadow: var(--shadow-lift);
    border-radius: 12px;
    background: #fff;
  }
}
/* 微信端提示点击可放大（长按识别） */
@media (hover: none) {
  .qr-img { cursor: pointer; }
}