/* ============================================================
   components.css —— 全站通用组件
   导航 / 页脚 / 按钮 / 板块头 / 卡片 / 标签 / 时间线 / 灯箱
   ============================================================ */

/* ===================== 顶部导航 ===================== */
.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  height: var(--header-h);
  background: rgba(250, 247, 241, .86);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .3s, box-shadow .3s;
}
.site-header.scrolled { border-bottom-color: var(--line); box-shadow: 0 4px 24px rgba(47,62,78,.06); }
.header-inner { height: var(--header-h); display: flex; align-items: center; justify-content: space-between; gap: 20px; }

/* 品牌标识 */
.brand { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.brand-seal {
  width: 42px; height: 42px;
  background-image: url('../img/logo.jpg'); 
  background-size: contain;  
  background-repeat: no-repeat;
  background-position: center;
  display: grid; place-items: center;
  box-shadow: 0 6px 16px rgba(109, 74, 143, .32);
  flex-shrink: 0;
}
.brand-seal svg { width: 24px; height: 24px; }
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-name { font-family: var(--font-serif); font-size: 1.3rem; font-weight: 700; color: var(--ink-deep); letter-spacing: .14em; }
.brand-sub { font-size: .62rem; letter-spacing: .32em; color: var(--gold-deep); font-weight: 600; }

/* 导航菜单 */
.main-nav { display: flex; align-items: center; gap: 4px; }
.main-nav a {
  position: relative; padding: 8px 15px; font-size: .95rem; color: var(--ink);
  border-radius: 999px; transition: color .25s, background .25s;
}
.main-nav a:hover { color: var(--brand); }
.main-nav a.active { background: var(--ink); color: #f7f3ea; }
.main-nav a.active:hover { color: #fff; }

/* 移动端汉堡 */
.nav-toggle { display: none; width: 44px; height: 44px; border-radius: 12px; position: relative; z-index: 102; }
.nav-toggle span { position: absolute; left: 11px; right: 11px; height: 2px; background: var(--ink); border-radius: 2px; transition: .35s; }
.nav-toggle span:nth-child(1) { top: 15px; } .nav-toggle span:nth-child(2) { top: 21px; } .nav-toggle span:nth-child(3) { top: 27px; }
.nav-toggle.open span:nth-child(1) { top: 21px; transform: rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { top: 21px; transform: rotate(-45deg); }

@media (max-width: 920px) {
  .nav-toggle { display: block; }
  .main-nav {
    position: fixed; inset: 0; z-index: 101;
    flex-direction: column; justify-content: flex-start; align-items: center;
    gap: 8px;
    background: var(--ink-deep);
    backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px);
    opacity: 0; visibility: hidden; transition: .35s;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    padding: calc(var(--header-h) + 16px) 20px 280px;
  }
  .main-nav.open { opacity: 1; visibility: visible; }
  .main-nav a {
    font-size: 1.1rem; font-family: var(--font-serif);
    padding: 10px 24px; color: #f5f1e8;
    background: rgba(255,255,255,.08); border-radius: 10px;
    border: 1px solid rgba(255,255,255,.12);
    text-align: center; min-width: 220px; width: 100%; max-width: 300px;
    transition: background .25s, color .25s, transform .25s;
    flex-shrink: 0;
  }
  .main-nav a:hover { background: rgba(255,255,255,.18); color: #fff; transform: translateX(4px); }
  .main-nav a.active { background: var(--gold); color: var(--ink-deep); border-color: var(--gold); }
  .main-nav a.active:hover { color: var(--ink-deep); }
}

/* ===================== 页脚 ===================== */
.site-footer { margin-top: 110px; background: var(--ink-deep); color: #c9d2dc; position: relative; overflow: hidden; }
.site-footer::before {
  content: ""; position: absolute; inset: 0 0 auto 0; height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
}
.footer-wave { display: block; width: 100%; height: 60px; margin-top: -1px; }
.footer-inner { padding: 64px 0 34px; display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 44px; }
.footer-brand .brand-name { color: #f3ede2; font-size: 1.5rem; }
.footer-brand .brand-sub { color: var(--gold-soft); }
.footer-motto { margin-top: 16px; font-size: .9rem; color: #8d9aa8; max-width: 300px; font-family: var(--font-serif); }
.footer-col h4 { color: #f3ede2; font-size: .98rem; margin-bottom: 16px; letter-spacing: .1em; }
.footer-col h4::after { content: ""; display: block; width: 26px; height: 2px; background: var(--gold); margin-top: 8px; border-radius: 2px; }
.footer-col a { display: block; padding: 5px 0; font-size: .9rem; color: #9fabb9; transition: color .25s, transform .25s; }
.footer-col a:hover { color: var(--gold-soft); transform: translateX(4px); }
.footer-link-desc { display: block; font-size: .76rem; color: #6d7a88; margin-top: 2px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.08);
  padding: 20px 0 26px; display: flex; justify-content: space-between; align-items: center; gap: 14px; flex-wrap: wrap;
  font-size: .82rem; color: #7d8a98;
}
.footer-bottom a { color: #a7b2bf; } .footer-bottom a:hover { color: var(--gold-soft); }
@media (max-width: 920px) { .footer-inner { grid-template-columns: 1fr 1fr; gap: 34px; } }
@media (max-width: 560px) { .footer-inner { grid-template-columns: 1fr; } }

/* ===================== 按钮 ===================== */
.btn {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 13px 30px; border-radius: 999px;
  font-size: .95rem; font-weight: 600; letter-spacing: .06em;
  transition: transform .3s, box-shadow .3s, background .3s, color .3s;
  will-change: transform;
}
.btn svg { width: 17px; height: 17px; }
.btn-primary { background: var(--ink); color: #f7f3ea; box-shadow: 0 10px 26px rgba(34,48,61,.24); }
.btn-primary:hover { transform: translateY(-3px); background: var(--ink-deep); box-shadow: 0 16px 34px rgba(34,48,61,.3); }
.btn-outline { border: 1.5px solid var(--ink); color: var(--ink); background: transparent; }
.btn-outline:hover { transform: translateY(-3px); background: var(--ink); color: #f7f3ea; }
.btn-gold { background: linear-gradient(135deg, var(--gold) 0%, var(--gold-deep) 100%); color: #fff; box-shadow: 0 10px 26px rgba(193,154,91,.36); }
.btn-gold:hover { transform: translateY(-3px); box-shadow: 0 16px 36px rgba(193,154,91,.44); }
.btn-light { background: rgba(255,255,255,.14); color: #f3ede2; border: 1px solid rgba(255,255,255,.34); backdrop-filter: blur(6px); }
.btn-light:hover { transform: translateY(-3px); background: rgba(255,255,255,.24); }
.btn-sm { padding: 9px 20px; font-size: .85rem; }

/* ===================== 板块头 ===================== */
.section { padding: 92px 0 30px; }
.section-head { text-align: center; max-width: 660px; margin: 0 auto 52px; }
.section-eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 18px; border-radius: 999px; background: var(--bg-warm);
  font-size: .8rem; letter-spacing: .18em; color: var(--gold-deep); font-weight: 600;
}
.section-eyebrow::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--gold); }
.section-title { font-size: clamp(1.8rem, 4vw, 2.6rem); margin-top: 18px; letter-spacing: .06em; }
.section-title em { font-style: normal; color: var(--gold-deep); }
.section-desc { margin-top: 14px; color: var(--ink-soft); font-size: 1rem; }
.section-head.align-left { text-align: left; margin-left: 0; }

/* ===================== 标签 / 徽章 ===================== */
.tag {
  display: inline-flex; align-items: center; padding: 4px 13px; border-radius: 999px;
  background: var(--bg-warm); color: var(--ink-soft);
  font-size: .78rem; font-weight: 500; letter-spacing: .04em;
  transition: background .25s, color .25s;
}
.tag-gold { background: rgba(193,154,91,.14); color: var(--gold-deep); }
.tag-brand { background: rgba(109,74,143,.12); color: var(--brand); }

/* ===================== 通用卡片 ===================== */
.card {
  background: var(--paper); border-radius: var(--radius-m);
  border: 1px solid rgba(47,62,78,.07);
  box-shadow: var(--shadow-sm);
  transition: transform .35s cubic-bezier(.2,.6,.2,1), box-shadow .35s;
  overflow: hidden;
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }

/* ===================== 图片占位 / 图框 ===================== */
.ph {
  position: relative; overflow: hidden; background: var(--bg-warm);
}
.ph img { width: 100%; height: 100%; object-fit: cover; transition: transform .8s cubic-bezier(.2,.6,.2,1); }
a:hover > .ph img, .card:hover .ph img { transform: scale(1.06); }
.ph-caption {
  position: absolute; inset: auto 0 0 0; padding: 30px 18px 14px;
  background: linear-gradient(transparent, rgba(24, 34, 44, .72));
  color: #f5f1e8; font-size: .85rem; letter-spacing: .05em;
  display: flex; justify-content: space-between; align-items: baseline; gap: 10px;
}
.ph-caption b { font-family: var(--font-serif); font-size: .98rem; font-weight: 600; }

/* ===================== 筛选条 ===================== */
.filter-bar { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin-bottom: 42px; }
.filter-btn {
  padding: 9px 22px; border-radius: 999px; font-size: .88rem; color: var(--ink-soft);
  background: var(--paper); border: 1px solid var(--line);
  transition: all .28s;
}
.filter-btn:hover { border-color: var(--gold); color: var(--gold-deep); }
.filter-btn.active { background: var(--ink); border-color: var(--ink); color: #f7f3ea; }

/* ===================== 灯箱 ===================== */
.lightbox {
  position: fixed; inset: 0; z-index: 200; display: grid; place-items: center;
  background: rgba(24, 33, 42, .92); backdrop-filter: blur(10px);
  opacity: 0; visibility: hidden; transition: .35s;
}
.lightbox.open { opacity: 1; visibility: visible; }
.lightbox-box { max-width: min(920px, 92vw); max-height: 86vh; display: flex; flex-direction: column; }
.lightbox-imgwrap { border-radius: var(--radius-m); overflow: hidden; box-shadow: var(--shadow-lg); }
.lightbox-imgwrap img { max-height: 68vh; width: auto; max-width: 100%; margin: 0 auto; }
.lightbox-meta { padding: 18px 6px 0; color: #d8dee5; display: flex; justify-content: space-between; gap: 16px; align-items: flex-start; }
.lightbox-meta h3 { color: #f5f1e8; font-size: 1.15rem; }
.lightbox-meta p { font-size: .85rem; color: #9fabb9; margin-top: 5px; }
.lightbox-close {
  position: absolute; top: 26px; right: 30px; width: 46px; height: 46px; border-radius: 50%;
  background: rgba(255,255,255,.1); color: #fff; font-size: 1.4rem; line-height: 1;
  transition: background .25s, transform .25s;
}
.lightbox-close:hover { background: rgba(255,255,255,.22); transform: rotate(90deg); }

/* ===================== 时间线 ===================== */
.timeline { position: relative; max-width: 860px; margin: 0 auto; padding-left: 58px; }
.timeline::before {
  content: ""; position: absolute; left: 20px; top: 8px; bottom: 8px; width: 2px;
  background: linear-gradient(var(--gold-soft), var(--gold), var(--gold-soft));
  border-radius: 2px;
}
.timeline-item { position: relative; padding-bottom: 46px; }
.timeline-item:last-child { padding-bottom: 0; }
.timeline-dot {
  position: absolute; left: -46px; top: 26px; width: 42px; height: 42px; border-radius: 50%;
  background: var(--paper); border: 2px solid var(--gold);
  display: grid; place-items: center;
  font-family: var(--font-serif); font-weight: 700; color: var(--gold-deep); font-size: .92rem;
  box-shadow: 0 0 0 6px var(--bg);
}
.timeline-card {
  background: var(--paper); border-radius: var(--radius-m); padding: 30px 34px;
  border: 1px solid rgba(47,62,78,.07); border-top: 3px solid var(--gold);
  box-shadow: var(--shadow-sm); transition: transform .35s, box-shadow .35s;
}
.timeline-card:hover { transform: translateX(6px); box-shadow: var(--shadow-md); }
.timeline-year { font-size: .85rem; letter-spacing: .2em; color: var(--gold-deep); font-weight: 700; }
.timeline-card h3 { font-size: 1.4rem; margin: 8px 0 12px; }
.timeline-card p { color: var(--ink-soft); font-size: .96rem; }
.timeline-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.timeline-quote {
  margin-top: 18px; padding: 12px 18px; border-left: 3px solid var(--gold);
  background: var(--bg-warm); border-radius: 0 var(--radius-s) var(--radius-s) 0;
  font-family: var(--font-serif); color: var(--ink); font-size: .95rem; font-style: italic;
}

/* ===================== 空状态 / 加载 ===================== */
.data-loading, .data-empty, .data-error {
  text-align: center; padding: 60px 20px; color: var(--ink-faint); font-size: .92rem;
}
.data-loading::before {
  content: ""; display: block; width: 34px; height: 34px; margin: 0 auto 14px;
  border: 3px solid var(--gold-soft); border-top-color: var(--gold-deep); border-radius: 50%;
  animation: spin 1s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.data-error { color: #a85b4a; }

/* file:// 协议提示条 */
.protocol-tip {
  position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%);
  z-index: 300; max-width: min(560px, 92vw);
  background: var(--ink-deep); color: #f3ede2; padding: 14px 22px; border-radius: 12px;
  font-size: .85rem; box-shadow: var(--shadow-lg); display: none;
}
.protocol-tip.show { display: block; }

/* ===================== 返回顶部 ===================== */
.back-top {
  position: fixed; right: 26px; bottom: 26px; z-index: 90;
  width: 46px; height: 46px; border-radius: 50%;
  background: var(--ink); color: #f7f3ea; display: grid; place-items: center;
  box-shadow: var(--shadow-md); opacity: 0; visibility: hidden; transform: translateY(12px);
  transition: .35s;
}
.back-top.show { opacity: 1; visibility: visible; transform: none; }
.back-top:hover { background: var(--brand); }
.back-top svg { width: 18px; height: 18px; }