/* 瑶谈官网改版 · 视觉原型（2026-10-14）
 * 配色沿用 Logo「瑶光绿」方案（docs/design/01.公司信息/05.02.01.H5页面配色.md）
 */

:root {
  --green: #7EB8A2;        /* 品牌主色：瑶光绿 */
  --green-dark: #386B57;   /* 按下/悬停 */
  --bg: #F7F8F6;           /* 页面底色：极浅米灰 */
  --card: #FFFFFF;         /* 卡片 */
  --highlight: #DCEFE5;    /* 交互高亮：极浅青绿 */
  --line: #E0EBE6;         /* 线条 */
  --ink: #2E3B35;          /* 文字主色：深岩灰 */
  --ink-soft: #68645E;     /* 辅助文字 */
  --gold: #C8956C;         /* 点缀金（极小面积） */
  --maxw: 1080px;
  --shadow: 0 2px 12px rgba(46, 59, 53, 0.06);
  --shadow-hover: 0 4px 16px rgba(126, 184, 162, 0.18);
}

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

html { scroll-behavior: smooth; scroll-padding-top: 88px; }

body {
  font-family: "PingFang SC", "Source Han Sans SC", "Noto Sans CJK SC", -apple-system, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* ── 顶部导航 ── */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(247, 248, 246, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.logo { font-size: 20px; font-weight: 700; display: flex; align-items: center; gap: 8px; }
.logo .dot {
  width: 26px; height: 26px; border-radius: 8px;
  background: var(--green); display: inline-block; position: relative;
}
.logo .dot::after {
  content: ""; position: absolute; inset: 6px 7px;
  background: var(--gold); border-radius: 50%;
}
.nav-links { display: flex; align-items: center; gap: 28px; }
.nav-links a.menu-item { color: var(--ink); font-size: 15px; }
.nav-links a.menu-item:hover { color: var(--green-dark); }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: 999px; font-weight: 600; cursor: pointer;
  transition: background .15s, color .15s, transform .1s;
  border: none; text-align: center;
}
.btn-primary { background: var(--green-dark); color: #fff; padding: 11px 22px; font-size: 15px; }
.btn-primary:hover { background: var(--green-dark); }
.btn-ghost { background: transparent; color: var(--ink); padding: 10px 18px; font-size: 15px; border: 1px solid var(--line); }
.btn-ghost:hover { border-color: var(--green); color: var(--green-dark); }
.btn-link { color: var(--green-dark); font-weight: 600; }
.btn-link:hover { text-decoration: underline; }

/* 手机菜单（右：了解APP + 汉堡） */
.nav-mobile { display: none; align-items: center; gap: 14px; }
.nav-burger { background: none; border: none; font-size: 22px; color: var(--ink); cursor: pointer; }
.mobile-menu { display: none; flex-direction: column; border-top: 1px solid var(--line); background: var(--card); }
.mobile-menu a { padding: 14px 24px; border-bottom: 1px solid var(--line); font-size: 16px; }
.mobile-menu.open { display: flex; }

/* ── 区块 ── */
.section { padding: 88px 0; }
.section.tint { background: var(--card); }
.section-head { max-width: 720px; margin-bottom: 40px; }
.section-title { font-size: 30px; font-weight: 700; margin-bottom: 12px; }
.section-sub { color: var(--ink-soft); font-size: 16px; }
.eyebrow { color: var(--green-dark); font-weight: 600; font-size: 14px; letter-spacing: .5px; margin-bottom: 8px; }

/* ── 首屏 Hero ── */
.hero { padding: 72px 0 80px; }
.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 48px; align-items: center; }
.hero-brand { font-size: 17px; color: var(--green-dark); font-weight: 600; margin-bottom: 16px; }
.hero-title { font-size: 40px; line-height: 1.25; font-weight: 700; margin-bottom: 16px; }
.hero-sub { font-size: 17px; color: var(--ink-soft); max-width: 520px; margin-bottom: 28px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.media-box {
  aspect-ratio: 4 / 3; border-radius: 18px; background: var(--highlight);
  border: 1.5px dashed var(--green); display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: 10px; color: var(--ink-soft);
  font-size: 14px; text-align: center; padding: 20px; cursor: pointer;
}
.media-box .play { width: 60px; height: 60px; border-radius: 50%; background: var(--green); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 22px; }
.media-box small { opacity: .8; }

/* 首屏右侧：示意对话界面（非真实截图） */
.media-box.chat-preview {
  aspect-ratio: auto; min-height: 260px; cursor: default;
  border: 1px solid var(--line); background: var(--card);
  box-shadow: var(--shadow); align-items: flex-start; justify-content: flex-start;
  text-align: left; gap: 0; padding: 22px;
}
.media-box.chat-preview .chat { width: 100%; }
.media-tag {
  display: inline-block; margin-top: 16px; font-size: 12px; color: var(--ink-soft);
  background: var(--highlight); border-radius: 999px; padding: 2px 10px;
}

/* ── 卡片 ── */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 26px; box-shadow: var(--shadow); }
.card:hover { box-shadow: var(--shadow-hover); border-color: var(--green); }
.card .ic { font-size: 26px; margin-bottom: 14px; }
.card h3 { font-size: 18px; margin-bottom: 8px; }
.card p { color: var(--ink-soft); font-size: 15px; }

/* 流程步骤 */
.steps { display: flex; gap: 16px; flex-wrap: wrap; margin: 28px 0; }
.step { flex: 1; min-width: 160px; background: var(--highlight); border-radius: 12px; padding: 18px; font-size: 15px; }
.step b { display: block; margin-bottom: 4px; color: var(--green-dark); }

/* 自然互动例子 */
.example { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 24px; max-width: 560px; }
.chat { display: flex; flex-direction: column; gap: 12px; }
.bubble { max-width: 82%; padding: 12px 16px; border-radius: 14px; font-size: 15px; }
.bubble.kid { background: var(--highlight); align-self: flex-start; border-bottom-left-radius: 4px; }
.bubble.ai { background: var(--green); color: var(--ink); align-self: flex-end; border-bottom-right-radius: 4px; }

/* ── FAQ 折叠 ── */
.faq { border-top: 1px solid var(--line); }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary { cursor: pointer; padding: 16px 0; font-weight: 600; list-style: none; display: flex; justify-content: space-between; align-items: center; }
.faq summary::after { content: "+"; font-size: 20px; color: var(--green-dark); }
.faq details[open] summary::after { content: "−"; }
.faq .ans { color: var(--ink-soft); padding: 0 0 16px; }

/* ── 状态徽标 ── */
.badge { display: inline-block; padding: 3px 12px; border-radius: 999px; font-size: 13px; font-weight: 600; background: var(--highlight); color: var(--green-dark); }

/* ── 页脚 ── */
.footer { background: #EEF2EE; border-top: 1px solid var(--line); padding: 56px 0 32px; }
.footer-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; margin-bottom: 40px; }
.footer h4 { font-size: 15px; margin-bottom: 14px; color: var(--ink); }
.footer-grid a { display: block; color: var(--ink-soft); font-size: 14px; padding: 4px 0; }
.footer-grid a:hover { color: var(--green-dark); }
.footer-legal { border-top: 1px solid var(--line); padding-top: 20px; color: var(--ink-soft); font-size: 13px; text-align: center; line-height: 2; }
.footer-beian { display: flex; align-items: center; justify-content: center; flex-wrap: wrap; gap: 8px; }
.footer-beian a { color: var(--ink-soft); font-size: 13px; }
.footer-beian a:hover { color: var(--green-dark); }
.beian-icon { width: 14px; height: 14px; }

/* ── 悬浮下载按钮（APP 页，手机） ── */
.float-dl { display: none; }

/* ── 响应式 ── */
@media (max-width: 1024px) {
  .nav-links { display: none; }
  .nav-mobile { display: flex; }
  .hero-grid { grid-template-columns: 1fr; gap: 28px; }
  .hero { padding: 48px 0 56px; }
  .hero-title { font-size: 30px; }
  .section { padding: 64px 0; }
  .cards { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
}

@media (min-width: 1025px) {
  .mobile-menu { display: none !important; }
}

/* 页面导航和APP页内目录分开呈现 */
.menu-item[aria-current="page"] { color: var(--green-dark); font-weight: 700; text-decoration: underline; text-underline-offset: 7px; }
.product-hero .hero-sub { max-width: 720px; }
.page-toc { display: flex; flex-wrap: wrap; gap: 12px 22px; margin-top: 36px; padding-top: 20px; border-top: 1px solid var(--line); font-size: 14px; }
.page-toc span { color: var(--ink-soft); }
.page-toc a { color: var(--green-dark); }
.page-toc a:hover { text-decoration: underline; }
.story-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 40px; align-items: start; }
.story-notes h3, .reading-block h3 { margin: 22px 0 10px; }
.story-notes h3:first-child { margin-top: 0; }
.story-notes p, .reading-block p { color: var(--ink-soft); margin-bottom: 20px; }
.reading-block { max-width: 780px; }
.section .reading-block:not(.wrap) { margin-top: 32px; }
.example-caption { color: var(--ink-soft); font-size: 13px; margin-top: 16px; }
@media (max-width: 1024px) { .story-grid { grid-template-columns: 1fr; gap: 24px; } }