/* 颜色与字体集中在这里，想换配色/字体改这几行即可 */
:root {
  --night: #1b2a52;     /* 夜空深蓝 */
  --dusk: #3c5a94;
  --ice: #e9f2fa;       /* 雪的浅蓝 */
  --line: #d3e2f0;
  --ink: #2b3550;
  --muted: #64708a;
  --dawn: #ff9d5c;      /* 晨光橙 */
  --dawn-deep: #d9481f;
  --peach: #ffe3c4;
  --paper: #fff9f2;
  --radius: 22px;
  --font-title: "Ma Shan Zheng", "STKaiti", "KaiTi", "Songti SC", serif;   /* 毛笔字：主标题 */
  --font-head: "Ma Shan Zheng", "STKaiti", "KaiTi", serif; /* 毛笔字：区块标题 */
  --font-body: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 64px; }
body { margin: 0; font-family: var(--font-body); color: var(--ink); background: var(--paper); line-height: 1.8; font-size: 17px; -webkit-text-size-adjust: 100%; }
h1, h2, h3 { margin: 0; line-height: 1.3; font-weight: 400; }
p { margin: 0; }
.wrap { max-width: 1000px; margin: 0 auto; padding: 0 20px; }

/* 顶栏 */
.topbar {
  position: fixed; inset: 0 0 auto 0; z-index: 20; height: 56px; padding: 0 20px;
  display: flex; align-items: center; justify-content: space-between;
  background: rgba(255,249,242,.9); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
}
.topbar.scrolled { box-shadow: 0 2px 14px rgba(27,42,82,.12); }
.brand { font-family: var(--font-title); font-size: 26px; color: var(--night); text-decoration: none; }
.staff-link { display: block; margin-top: 8px; font-family: var(--font-body); font-size: 12px; letter-spacing: 0; color: #8fa3c2; text-decoration: none; }
.staff-link:hover { color: #fff; }
.menu-btn { display: none; background: none; border: 0; font-size: 26px; color: var(--night); padding: 8px; cursor: pointer; }
.nav { display: flex; gap: 4px; }
.nav a { color: var(--night); text-decoration: none; padding: 6px 14px; border-radius: 999px; font-size: 16px; font-weight: 600; }
.nav a:hover { background: var(--peach); }

/* 首页：冬日海边晨光 */
.hero {
  position: relative; overflow: hidden; color: #fff; text-align: center;
  min-height: 100vh; min-height: 100svh; display: flex; align-items: flex-start; justify-content: center;
  padding: 82px 20px 130px;
  background: linear-gradient(180deg, #172849 0%, #2a4872 38%, #687e9c 63%, #e3a184 84%, #f8d8a8 100%);
}
.sun { /* 地平线上的晨光 */
  position: absolute; left: 50%; bottom: 72px; width: 900px; height: 490px; transform: translateX(-50%);
  background: radial-gradient(ellipse at 50% 100%, rgba(255,236,190,.95) 0%, rgba(255,190,120,.5) 30%, transparent 68%);
  pointer-events: none;
}
#snow { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; }
.seascape { position: absolute; left: 0; bottom: 0; width: 100%; height: 190px; display: block; }
.figure { position: absolute; left: 83%; bottom: 38px; height: 58px; transform: translateX(-50%); }
.hero-inner { position: relative; z-index: 1; max-width: 680px; }
.eyebrow { letter-spacing: .3em; font-size: 14px; opacity: .9; margin-bottom: 4px; }
.hero h1 {
  font-family: var(--font-title); font-size: clamp(60px, 16vw, 120px); white-space: nowrap; letter-spacing: .06em; line-height: 1.15;
  color: #fff6e6; text-shadow: 0 0 30px rgba(255,190,120,.6), 0 4px 18px rgba(27,42,82,.4);
}
.verse-ref { margin-top: 6px; font-family: var(--font-body); font-weight: 700; font-size: 20px; color: var(--peach); letter-spacing: .1em; }
.verse { margin: 12px auto 0; font-size: 16px; opacity: .95; max-width: 30em; }
.date {
  display: inline-block; margin-top: 17px; padding: 6px 24px; border-radius: 999px;
  font-family: var(--font-body); font-weight: 700; font-size: 21px; background: rgba(27,42,82,.35); border: 1px solid rgba(255,255,255,.45);
}
.intro { margin: 15px auto 0; font-size: 16px; max-width: 34em; text-align: left; opacity: .95; }
.btn {
  display: inline-block; margin-top: 20px; padding: 14px 44px; border-radius: 999px;
  background: var(--dawn-deep); color: #fff; font-family: var(--font-body); font-weight: 700; font-size: 22px; letter-spacing: .1em; text-decoration: none;
  box-shadow: 0 6px 0 #a3300f, 0 12px 26px rgba(217,72,31,.4); transition: transform .12s, box-shadow .12s;
}
.btn:hover { transform: translateY(2px); box-shadow: 0 4px 0 #a3300f, 0 8px 20px rgba(217,72,31,.4); }
/* 通用区块 */
.section { position: relative; padding: 76px 0; }
.section.alt { background: var(--ice); }
.section h2 { font-family: var(--font-head); font-size: 38px; text-align: center; color: var(--night); margin-bottom: 38px; }
.section h2::after { content: ""; display: block; width: 36px; height: 3px; margin: 12px auto 0; border-radius: 2px; background: var(--dawn); }

.cards { display: grid; gap: 18px; grid-template-columns: repeat(3, 1fr); }
.cards.four { grid-template-columns: repeat(4, 1fr); }
.card { background: #fff; border-radius: var(--radius); padding: 26px 20px; box-shadow: 0 2px 12px rgba(27,42,82,.06); }
.info-card { text-align: center; }
.info-card .label { display: block; margin-top: 4px; color: var(--muted); font-size: 14px; letter-spacing: .15em; }
.info-card .value { display: block; margin-top: 4px; font-family: var(--font-body); font-weight: 700; font-size: 20px; color: var(--night); line-height: 1.5; }
.info-card:last-child .value { font-family: var(--font-body); font-size: 17px; font-weight: 600; overflow-wrap: anywhere; }
.info-card .note { display: block; color: var(--muted); font-size: 14px; }
.todo { color: var(--muted) !important; }

/* 活动：彩色小卡，略带倾斜 */
.act { text-align: left; }
.act .num { font-family: var(--font-head); font-size: 34px; line-height: 1; color: var(--dawn-deep); }
.act h3 { margin: 10px 0 6px; font-size: 20px; font-weight: 700; color: var(--night); }
.act p { font-size: 15px; color: var(--muted); }

/* 讲员：拱门相框 */
.speakers { display: grid; gap: 24px; grid-template-columns: repeat(auto-fit, minmax(0, 580px)); justify-content: center; }
.speaker { display: flex; gap: 28px; align-items: center; background: #fff; border-radius: var(--radius); padding: 26px; box-shadow: 0 6px 20px rgba(27,42,82,.08); }
.photo { flex: 0 0 150px; height: 200px; border-radius: 75px 75px 14px 14px; overflow: hidden; }
.photo img { width: 100%; height: 100%; object-fit: cover; display: block; }
.photo.placeholder {
  display: flex; align-items: center; justify-content: center; color: var(--muted); font-size: 15px;
  background: repeating-linear-gradient(45deg, #f3f8fc, #f3f8fc 10px, #e6f0f7 10px, #e6f0f7 20px); border: 2px dashed #a9c7db;
}
.speaker h3 { font-family: var(--font-body); font-weight: 700; font-size: 24px; color: var(--night); }
.bio-label { margin-top: 10px; font-size: 14px; color: var(--dawn-deep); letter-spacing: .1em; }

.footer { text-align: center; padding: 34px 20px; background: var(--night); color: #c9d6ea; font-family: var(--font-body); font-weight: 700; font-size: 15px; letter-spacing: .1em; }

@media (max-width: 860px) {
  .cards.four { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  body { font-size: 16px; }
  .menu-btn { display: block; }
  .nav { display: none; position: absolute; top: 56px; left: 0; right: 0; flex-direction: column; background: var(--paper); padding: 8px 20px 16px; box-shadow: 0 8px 16px rgba(27,42,82,.12); }
  .nav.open { display: flex; }
  .nav a { padding: 14px 8px; border-bottom: 1px solid var(--line); border-radius: 0; }
  .hero { padding: 80px 18px 150px; }
  .seascape { height: 145px; }
  .figure { height: 46px; bottom: 31px; }
  .section { padding: 60px 0; }
  .section h2 { font-size: 29px; }
  .cards { grid-template-columns: 1fr; }
  .cards.four { grid-template-columns: 1fr 1fr; gap: 12px; }
  .speaker { flex-direction: column; text-align: center; }
  .photo { flex-basis: auto; width: 150px; height: 200px; }
  .btn { display: block; text-align: center; }
  .hero .btn { display: inline-block; width: 100%; max-width: 320px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .btn { transition: none; }
}