:root {
  --ink: #2b2620;
  --ink-soft: #5c5347;
  --paper: #f7f2e9;
  --paper-2: #efe7d7;
  --gold: #b8893b;
  --gold-deep: #9a6f2a;
  --red: #b23a30;
  --green: #4a6b4d;
  --line: #e2d7c3;
  --white: #fffdf8;
  --shadow: 0 10px 40px rgba(60, 45, 20, 0.12);
  --radius: 16px;
  --font: "PingFang SC", "Microsoft YaHei", "Noto Serif SC", serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

.container { width: min(1120px, 90%); margin: 0 auto; }

a { color: inherit; text-decoration: none; }

/* ---------- 导航 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(247, 242, 233, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.brand { display: flex; align-items: center; gap: 10px; font-size: 20px; font-weight: 700; }
.brand-seal {
  display: grid; place-items: center;
  width: 38px; height: 38px; border-radius: 8px;
  background: var(--red); color: #fff; font-size: 20px;
  box-shadow: 0 3px 10px rgba(178, 58, 48, 0.35);
}
.brand-name { letter-spacing: 2px; }
.nav-links { display: flex; gap: 28px; }
.nav-links a { position: relative; font-size: 15px; color: var(--ink-soft); transition: color .2s; }
.nav-links a:hover { color: var(--red); }
.nav-links a::after {
  content: ""; position: absolute; left: 0; bottom: -6px; width: 0; height: 2px;
  background: var(--gold); transition: width .25s;
}
.nav-links a:hover::after { width: 100%; }
.nav-toggle { display: none; font-size: 22px; background: none; border: none; cursor: pointer; }

/* ---------- 主视觉 ---------- */
.hero {
  position: relative; min-height: 88vh;
  display: flex; align-items: center;
  background:
    radial-gradient(circle at 20% 30%, rgba(184,137,59,.18), transparent 45%),
    radial-gradient(circle at 80% 70%, rgba(74,107,77,.15), transparent 50%),
    linear-gradient(135deg, #f3ead9 0%, #e9ddc5 100%);
  overflow: hidden;
}
.hero::before {
  content: "仁 義 禮 智 信";
  position: absolute; right: -2%; top: 8%;
  font-size: clamp(80px, 16vw, 220px); font-weight: 800;
  color: rgba(154, 111, 42, 0.06); writing-mode: vertical-rl;
  letter-spacing: 30px; user-select: none; pointer-events: none;
}
.hero-content { position: relative; z-index: 2; max-width: 720px; }
.hero-kicker { color: var(--gold-deep); letter-spacing: 4px; margin-bottom: 18px; font-size: 15px; }
.hero-title { font-size: clamp(36px, 6vw, 64px); line-height: 1.25; font-weight: 800; letter-spacing: 3px; }
.hero-sub { margin: 24px 0 36px; font-size: clamp(15px, 2vw, 19px); color: var(--ink-soft); }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-scroll {
  position: absolute; bottom: 24px; left: 50%; transform: translateX(-50%);
  color: var(--ink-soft); font-size: 13px; letter-spacing: 2px;
  animation: bob 2s ease-in-out infinite;
}
@keyframes bob { 0%,100%{transform:translate(-50%,0)} 50%{transform:translate(-50%,8px)} }

.btn {
  display: inline-block; padding: 13px 30px; border-radius: 999px;
  font-size: 15px; font-weight: 600; letter-spacing: 1px; cursor: pointer;
  transition: transform .2s, box-shadow .2s; border: 1px solid transparent;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--red); color: #fff; box-shadow: 0 8px 22px rgba(178,58,48,.3); }
.btn-ghost { background: transparent; border-color: var(--gold-deep); color: var(--gold-deep); }
.btn-ghost:hover { background: var(--gold-deep); color: #fff; }

/* ---------- 通用区块 ---------- */
.section { padding: 88px 0; }
.section-head { text-align: center; max-width: 640px; margin: 0 auto 52px; }
.section-tag {
  display: inline-block; padding: 5px 16px; border-radius: 999px;
  background: var(--paper-2); color: var(--gold-deep);
  font-size: 13px; letter-spacing: 2px; margin-bottom: 16px;
}
.section-title { font-size: clamp(26px, 4vw, 38px); letter-spacing: 2px; }
.section-desc { margin-top: 14px; color: var(--ink-soft); }

/* ---------- 五常卡片 ---------- */
.values-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 22px; }
.value-card {
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 30px 24px; text-align: center; transition: transform .25s, box-shadow .25s;
}
.value-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.value-glyph {
  display: grid; place-items: center; width: 64px; height: 64px; margin: 0 auto 16px;
  border-radius: 50%; font-size: 30px; font-weight: 800; color: #fff;
}
.value-card h3 { font-size: 20px; letter-spacing: 2px; margin-bottom: 8px; }
.value-card p { color: var(--ink-soft); font-size: 14px; }

/* ---------- 语录 ---------- */
.quotes-section { background: linear-gradient(135deg, #2b2620, #3a322a); padding: 72px 0; }
.quote-card { position: relative; max-width: 760px; margin: 0 auto; text-align: center; color: var(--paper); }
.quote-mark { font-size: 90px; color: var(--gold); line-height: .5; height: 50px; }
.quote-card blockquote { font-size: clamp(22px, 3.5vw, 34px); letter-spacing: 3px; min-height: 1.5em; }
.quote-card cite { display: block; margin-top: 20px; color: var(--gold); font-style: normal; letter-spacing: 2px; }

/* ---------- 课程 ---------- */
.courses-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 26px; }
.course-card {
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; transition: transform .25s, box-shadow .25s; display: flex; flex-direction: column;
}
.course-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.course-cover { height: 160px; display: grid; place-items: center; position: relative; color: #fff; }
.course-cover span { font-size: 30px; font-weight: 800; letter-spacing: 4px; text-shadow: 0 2px 12px rgba(0,0,0,.3); }
.course-badge {
  position: absolute; top: 12px; left: 12px; padding: 3px 12px; border-radius: 6px;
  background: rgba(0,0,0,.4); font-size: 12px; letter-spacing: 1px;
}
.course-info { padding: 20px; flex: 1; display: flex; flex-direction: column; }
.course-info h3 { font-size: 18px; letter-spacing: 1px; margin-bottom: 8px; }
.course-info p { color: var(--ink-soft); font-size: 14px; flex: 1; }
.course-meta { display: flex; align-items: center; justify-content: space-between; margin-top: 16px; }
.course-price { color: var(--red); font-size: 20px; font-weight: 700; }
.course-price small { font-size: 13px; color: var(--ink-soft); text-decoration: line-through; margin-left: 6px; font-weight: 400; }
.course-price.free { color: var(--green); }
.course-views { font-size: 13px; color: var(--ink-soft); }

/* ---------- 书院介绍 ---------- */
.about { background: var(--paper-2); }
.about-inner { display: grid; grid-template-columns: 1.2fr 1fr; gap: 56px; align-items: center; }
.about-text p { margin-top: 16px; color: var(--ink-soft); }
.stats { display: flex; gap: 36px; margin-top: 32px; }
.stat strong { font-size: 36px; color: var(--red); display: block; }
.stat strong span { font-size: 16px; }
.stat em { font-style: normal; color: var(--ink-soft); font-size: 14px; }
.about-visual { display: grid; place-items: center; }
.about-card {
  width: 260px; height: 260px; border-radius: 24px;
  background: linear-gradient(135deg, var(--red), #8a2b22);
  display: grid; place-items: center; gap: 18px; color: #fff; text-align: center;
  box-shadow: 0 20px 50px rgba(178,58,48,.35); transform: rotate(-3deg);
}
.about-seal {
  display: grid; place-items: center; width: 96px; height: 96px; border-radius: 16px;
  border: 3px solid rgba(255,255,255,.5); font-size: 40px; font-weight: 800; letter-spacing: 4px;
}
.about-card p { letter-spacing: 2px; padding: 0 20px; }

/* ---------- 页脚 ---------- */
.site-footer { background: #2b2620; color: #d9cdb8; padding-top: 56px; }
.footer-inner { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px; padding-bottom: 40px; }
.brand-footer { color: #fff; margin-bottom: 14px; }
.footer-col h4 { color: #fff; margin-bottom: 14px; letter-spacing: 1px; }
.footer-col a { display: block; color: #d9cdb8; margin-bottom: 8px; transition: color .2s; }
.footer-col a:hover { color: var(--gold); }
.footer-col p { font-size: 14px; margin-bottom: 6px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.1); padding: 18px 0; font-size: 13px; color: #9a8f7c; }

/* ---------- 智能客服 ---------- */
.chat-fab {
  position: fixed; right: 24px; bottom: 24px; z-index: 60;
  width: 60px; height: 60px; border-radius: 50%; border: none; cursor: pointer;
  background: var(--red); color: #fff; font-size: 26px;
  box-shadow: 0 10px 30px rgba(178,58,48,.45); transition: transform .25s;
}
.chat-fab:hover { transform: scale(1.08); }
.chat-fab-dot {
  position: absolute; top: 10px; right: 12px; width: 10px; height: 10px;
  background: #4caf50; border-radius: 50%; border: 2px solid #fff;
}
.chat-panel {
  position: fixed; right: 24px; bottom: 96px; z-index: 61;
  width: min(380px, calc(100vw - 32px)); height: min(560px, calc(100vh - 130px));
  background: var(--white); border-radius: 18px; box-shadow: 0 24px 60px rgba(40,30,15,.3);
  display: flex; flex-direction: column; overflow: hidden;
  opacity: 0; transform: translateY(20px) scale(.96); pointer-events: none;
  transition: opacity .25s, transform .25s;
}
.chat-panel.open { opacity: 1; transform: translateY(0) scale(1); pointer-events: auto; }
.chat-header {
  background: linear-gradient(135deg, var(--red), #8a2b22); color: #fff;
  padding: 16px 18px; display: flex; align-items: center; justify-content: space-between;
}
.chat-header-info { display: flex; align-items: center; gap: 12px; }
.chat-avatar {
  display: grid; place-items: center; width: 40px; height: 40px; border-radius: 10px;
  background: rgba(255,255,255,.18); font-size: 20px; font-weight: 700;
}
.chat-header-info strong { display: block; font-size: 15px; }
.chat-header-info small { font-size: 12px; opacity: .85; }
.chat-close { background: none; border: none; color: #fff; font-size: 18px; cursor: pointer; opacity: .85; }
.chat-close:hover { opacity: 1; }
.chat-body { flex: 1; overflow-y: auto; padding: 18px; display: flex; flex-direction: column; gap: 12px; background: var(--paper); }
.msg { max-width: 80%; padding: 10px 14px; border-radius: 14px; font-size: 14px; line-height: 1.6; white-space: pre-wrap; }
.msg.bot { align-self: flex-start; background: var(--white); border: 1px solid var(--line); border-bottom-left-radius: 4px; }
.msg.user { align-self: flex-end; background: var(--red); color: #fff; border-bottom-right-radius: 4px; }
.msg.typing { display: flex; gap: 4px; }
.msg.typing span { width: 7px; height: 7px; background: var(--ink-soft); border-radius: 50%; animation: blink 1.2s infinite; }
.msg.typing span:nth-child(2){ animation-delay:.2s } .msg.typing span:nth-child(3){ animation-delay:.4s }
@keyframes blink { 0%,60%,100%{opacity:.2} 30%{opacity:1} }
.chat-suggestions { display: flex; flex-wrap: wrap; gap: 8px; padding: 10px 14px 0; background: var(--paper); }
.chat-suggestions button {
  font-size: 12.5px; padding: 6px 12px; border-radius: 999px; cursor: pointer;
  background: var(--white); border: 1px solid var(--line); color: var(--ink-soft); transition: all .2s;
}
.chat-suggestions button:hover { border-color: var(--gold); color: var(--gold-deep); }
.chat-input { display: flex; gap: 8px; padding: 12px 14px; background: var(--paper); border-top: 1px solid var(--line); }
.chat-input input { flex: 1; padding: 11px 14px; border: 1px solid var(--line); border-radius: 999px; font-size: 14px; font-family: inherit; outline: none; }
.chat-input input:focus { border-color: var(--gold); }
.chat-input button {
  width: 42px; height: 42px; border-radius: 50%; border: none; cursor: pointer;
  background: var(--red); color: #fff; font-size: 16px; flex-shrink: 0; transition: transform .2s;
}
.chat-input button:hover { transform: scale(1.08); }

/* ---------- 响应式 ---------- */
@media (max-width: 860px) {
  .nav-links {
    position: absolute; top: 68px; left: 0; right: 0; flex-direction: column;
    background: var(--paper); padding: 12px 0; gap: 0; border-bottom: 1px solid var(--line);
    transform: scaleY(0); transform-origin: top; transition: transform .2s; display: flex;
  }
  .nav-links.open { transform: scaleY(1); }
  .nav-links a { padding: 12px 24px; }
  .nav-toggle { display: block; }
  .about-inner { grid-template-columns: 1fr; gap: 36px; }
  .stats { justify-content: space-between; gap: 12px; }
  .footer-inner { grid-template-columns: 1fr; gap: 28px; }
  .mobile-hide { display: none; }
}