/* 日本頭条 — official site (static)
   Background follows the old toutiao.jp.ai (white page, light-gray cards, light nav bar);
   accent = deep blue (navy). */
:root {
  --bg:        #FFFFFF;
  --card:      #F2F2F2;   /* old site: Bootstrap jumbotron #eee */
  --card-2:    #E9E9E9;
  --line:      #E3E3E3;
  --text:      #222222;
  --text-2:    #6B6B6B;
  --link:      #1F4E8C;   /* titles */
  --accent:    #1F4E8C;   /* deep blue */
  --accent-dk: #163A6B;
  --wechat:    #1AAD19;
  --radius:    8px;
  --maxw:      880px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans", "Hiragino Kaku Gothic ProN",
    "Noto Sans SC", "Noto Sans JP", "Microsoft YaHei", "Yu Gothic", Meiryo, sans-serif;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent-dk); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 16px; }

/* ---- Header (old site: light Bootstrap nav bar) ---- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: linear-gradient(#FFFFFF, #F8F8F8);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 1px 4px rgba(0, 0, 0, .04);
}
.site-header .wrap { display: flex; align-items: center; gap: 12px; min-height: 52px; flex-wrap: wrap; }
.logo { display: flex; align-items: center; gap: 8px; font-weight: 800; font-size: 18px; color: var(--text); white-space: nowrap; }
.logo:hover { text-decoration: none; }
.logo img { width: 28px; height: 28px; border-radius: 7px; }
.nav { display: flex; gap: 2px; margin-left: auto; flex-wrap: wrap; }
.nav a { color: var(--text-2); font-size: 14px; font-weight: 600; padding: 6px 11px; border-radius: 6px; }
.nav a:hover { background: var(--card); color: var(--text); text-decoration: none; }
.nav a.active { background: var(--card-2); color: var(--text); }
.nav a.app { background: var(--accent); color: #fff; }
.nav a.app:hover { background: var(--accent-dk); }

/* ---- Hero ---- */
.hero { text-align: center; padding: 28px 16px 22px; border-bottom: 1px solid var(--line); }
.hero h1 { margin: 0 0 6px; font-size: 24px; }
.hero p { margin: 0 auto 16px; max-width: 640px; color: var(--text-2); }

.btn {
  display: inline-block; background: var(--accent); color: #fff; border: 0; cursor: pointer;
  font: inherit; font-weight: 700; padding: 9px 20px; border-radius: 999px;
}
.btn:hover { background: var(--accent-dk); color: #fff; text-decoration: none; }
.btn.ghost { background: #fff; color: var(--text); border: 1px solid var(--line); }
.btn.ghost:hover { background: var(--card); }
.btn.small { padding: 3px 12px; font-size: 13px; }

/* ---- Sections ---- */
main.wrap { padding-top: 18px; padding-bottom: 40px; }
.section-head { display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; margin: 6px 0 14px; }
.section-head h1, .section-head h2 { margin: 0; font-size: 20px; }
.section-head p { margin: 0; color: var(--text-2); font-size: 14px; }

.tabs { display: inline-flex; background: var(--card); border-radius: 999px; padding: 3px; margin-bottom: 14px; }
.tabs a { padding: 5px 18px; border-radius: 999px; color: var(--text-2); font-weight: 600; font-size: 14px; }
.tabs a:hover { text-decoration: none; color: var(--text); }
.tabs a.active { background: #fff; color: var(--text); box-shadow: 0 1px 3px rgba(0, 0, 0, .12); }

/* ---- Cards (old site: gray jumbotron per post) ---- */
.cards { display: flex; flex-direction: column; gap: 14px; }
.card { background: var(--card); border-radius: var(--radius); padding: 14px 18px; }
.card-meta { display: flex; align-items: center; gap: 8px; font-size: 12px; color: var(--text-2); }
.card-link { display: block; color: inherit; }
.card-link:hover { text-decoration: none; }
.card-link:hover .card-title { text-decoration: underline; }
.card-title { margin: 6px 0 4px; font-size: 17px; color: var(--link); font-weight: 600; overflow-wrap: anywhere; }
.card-text {
  margin: 0; color: var(--text); font-size: 15px; overflow-wrap: anywhere;
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden;
  white-space: pre-line;
}
.card-foot { display: flex; align-items: center; gap: 14px; margin-top: 8px; font-size: 13px; color: var(--text-2); }
.spacer { flex: 1; }
.who { color: var(--text-2); }
.cat { color: var(--accent-dk); font-weight: 600; }
.badge { font-size: 11px; font-weight: 700; padding: 1px 8px; border-radius: 999px; }
.badge.wechat { background: rgba(26, 173, 25, .12); color: var(--wechat); }

.tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.tag { font-size: 12px; padding: 1px 9px; border-radius: 999px; background: rgba(31, 78, 140, .10); color: var(--accent-dk); }
.tag:hover { text-decoration: none; background: rgba(31, 78, 140, .18); }

.pager { display: flex; justify-content: space-between; align-items: center; gap: 10px; margin-top: 20px; }
.page-no { color: var(--text-2); font-size: 13px; }

.state { color: var(--text-2); text-align: center; padding: 40px 0; }
.state.error { color: #B3261E; }

/* ---- Discover ---- */
.cat-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 12px; }
.cat-card { display: flex; flex-direction: column; gap: 4px; background: var(--card); border-radius: var(--radius); padding: 14px 16px; color: var(--text); }
.cat-card:hover { background: var(--card-2); text-decoration: none; }
.cat-card strong { font-size: 17px; }
.cat-card span { font-size: 13px; color: var(--text-2); }

/* ---- Detail ---- */
.crumb { font-size: 13px; color: var(--text-2); margin-bottom: 10px; }
.detail { background: var(--card); border-radius: var(--radius); padding: 18px 20px; }
.detail h1 { margin: 0 0 6px; font-size: 22px; overflow-wrap: anywhere; }
.body { white-space: pre-wrap; overflow-wrap: anywhere; font-size: 16px; margin-top: 12px; }
.added { margin-top: 14px; background: #fff; border-radius: 6px; padding: 10px 14px; }
.added b { font-size: 12px; color: var(--text-2); }
.added .body { margin-top: 2px; }
.wechat-box { margin-top: 14px; padding: 10px 14px; background: rgba(26, 173, 25, .08); border-radius: 6px; }
.comments h2 { font-size: 17px; margin: 24px 0 10px; }
.comment { border-bottom: 1px solid var(--line); padding: 10px 2px; }
.comment .body { margin-top: 4px; font-size: 15px; }
.comment.muted .body { color: var(--text-2); }
.floor { color: var(--text-2); }
.reply-to { font-size: 12px; color: var(--accent-dk); }
.more-comments { margin-top: 12px; }
.actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }

/* ---- Article (about / terms / privacy) ---- */
.article h1 { font-size: 22px; margin: 6px 0 12px; }
.article h2 { font-size: 17px; margin: 24px 0 8px; }
.article p, .article li { color: var(--text); }
.article .updated { color: var(--text-2); font-size: 13px; }
.article .body { font-size: 15px; }
.feature-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 12px; margin: 16px 0; }
.feature { background: var(--card); border-radius: var(--radius); padding: 14px 16px; }
.feature h3 { margin: 0 0 4px; font-size: 16px; }
.feature p { margin: 0; color: var(--text-2); font-size: 14px; }

/* ---- Footer ---- */
.site-footer { border-top: 1px solid var(--line); padding: 26px 0 34px; color: var(--text-2); font-size: 13px; }
.site-footer .links, .lang-switch { display: flex; flex-wrap: wrap; gap: 6px 16px; margin-bottom: 10px; }
.site-footer a { color: var(--text-2); }
.lang-switch a.active { color: var(--text); font-weight: 700; }

@media (max-width: 560px) {
  .hero h1 { font-size: 20px; }
  .card, .detail { padding: 12px 14px; }
  .nav a { padding: 5px 8px; font-size: 13px; }
  .nav a.app { display: none; }
}