/* ============================================
   拾字堂 · editorial paper aesthetic
   暖纸底色 + 墨黑正文 + 朱砂点缀
   ============================================ */

:root {
  --paper: #f5efe3;
  --paper-deep: #ece3d0;
  --ink: #26221c;
  --ink-soft: #5c554a;
  --vermilion: #c8452c;
  --vermilion-deep: #a33520;
  --hairline: #c9bda4;
  --serif-display: "Fraunces", "Noto Serif SC", "Songti SC", serif;
  --serif-body: "Noto Serif SC", "Songti SC", serif;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--paper);
  background-image:
    radial-gradient(ellipse 80% 50% at 20% -10%, rgba(200, 69, 44, 0.06), transparent),
    radial-gradient(ellipse 60% 40% at 90% 10%, rgba(92, 85, 74, 0.05), transparent);
  color: var(--ink);
  font-family: var(--serif-body);
  font-size: 17px;
  line-height: 1.85;
  -webkit-font-smoothing: antialiased;
}

/* 纸张颗粒质感 */
.grain {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 99;
  opacity: 0.5;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3CfeColorMatrix values='0 0 0 0 0.15 0 0 0 0 0.13 0 0 0 0 0.1 0 0 0 0.04 0'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)'/%3E%3C/svg%3E");
}

::selection { background: var(--vermilion); color: var(--paper); }

a { color: inherit; }

/* ---------- 报头 ---------- */
.masthead {
  border-bottom: 3px double var(--ink);
  padding: 1.4rem 0 1.1rem;
}

.masthead__inner {
  max-width: 920px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  text-decoration: none;
}

.brand__mark {
  display: grid;
  place-items: center;
  width: 2.6rem;
  height: 2.6rem;
  background: var(--vermilion);
  color: var(--paper);
  font-family: var(--serif-display);
  font-weight: 900;
  font-size: 1.5rem;
  transform: rotate(-4deg);
  box-shadow: 2px 3px 0 rgba(38, 34, 28, 0.25);
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.brand:hover .brand__mark { transform: rotate(4deg) scale(1.06); }

.brand__name {
  font-family: var(--serif-display);
  font-weight: 900;
  font-size: 1.5rem;
  letter-spacing: 0.08em;
}

.brand__name em {
  font-style: normal;
  font-weight: 400;
  font-size: 0.72rem;
  color: var(--ink-soft);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  display: block;
  margin-top: -0.3rem;
}

.nav { display: flex; gap: 1.6rem; }

.nav__link {
  text-decoration: none;
  font-size: 0.95rem;
  letter-spacing: 0.15em;
  color: var(--ink-soft);
  position: relative;
  padding-bottom: 0.2rem;
  transition: color 0.25s;
}

.nav__link::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 100%;
  height: 2px;
  background: var(--vermilion);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.3s ease;
}

.nav__link:hover, .nav__link.is-active { color: var(--ink); }
.nav__link:hover::after, .nav__link.is-active::after {
  transform: scaleX(1);
  transform-origin: left;
}

.nav__link--rss { color: var(--vermilion); font-weight: 600; }

/* ---------- 卷首语 ---------- */
.hero {
  max-width: 920px;
  margin: 0 auto;
  padding: 4.5rem 2rem 3.5rem;
  display: grid;
  grid-template-columns: 1fr;
}

.hero__issue {
  font-size: 0.8rem;
  letter-spacing: 0.5em;
  color: var(--vermilion);
  text-transform: uppercase;
  margin-bottom: 1.4rem;
}

.hero__title {
  font-family: var(--serif-display);
  font-weight: 900;
  font-size: clamp(2.6rem, 7vw, 4.6rem);
  line-height: 1.18;
  letter-spacing: 0.02em;
}

.hero__title span { display: block; }

.hero__title--accent {
  color: var(--vermilion);
  font-style: italic;
  margin-left: 2.2em;
  position: relative;
}

.hero__title--accent::before {
  content: "❦";
  position: absolute;
  left: -1.4em;
  top: 0.35em;
  font-size: 0.5em;
  color: var(--ink-soft);
}

.hero__lede {
  margin-top: 1.8rem;
  max-width: 34em;
  color: var(--ink-soft);
  font-size: 1.05rem;
}

.hero__meta {
  margin-top: 2.2rem;
  display: flex;
  align-items: center;
  gap: 0.8rem;
  font-size: 0.85rem;
  letter-spacing: 0.12em;
  color: var(--ink-soft);
}

.hero__sigil { color: var(--vermilion); font-size: 0.7rem; }

/* ---------- 分隔线 ---------- */
.rule {
  max-width: 920px;
  margin: 0 auto;
  border: none;
  border-top: 1px solid var(--hairline);
  position: relative;
}

.rule::after {
  content: "◆";
  position: absolute;
  left: 50%;
  top: -0.65em;
  transform: translateX(-50%);
  background: var(--paper);
  padding: 0 0.8rem;
  color: var(--vermilion);
  font-size: 0.7rem;
}

/* ---------- 章节标题 ---------- */
.section-head {
  display: flex;
  align-items: baseline;
  gap: 1.2rem;
  margin-bottom: 2.2rem;
}

.section-head__title {
  font-family: var(--serif-display);
  font-weight: 900;
  font-size: 1.7rem;
  letter-spacing: 0.3em;
}

.section-head__en {
  font-family: var(--serif-display);
  font-style: italic;
  font-size: 0.85rem;
  color: var(--ink-soft);
  letter-spacing: 0.1em;
}

/* ---------- 文章列表 ---------- */
.essays, .links {
  max-width: 920px;
  margin: 0 auto;
  padding: 3.2rem 2rem;
}

.post {
  display: grid;
  grid-template-columns: 5.5rem 1fr auto;
  gap: 1.8rem;
  padding: 1.6rem 0;
  border-bottom: 1px solid var(--hairline);
  align-items: baseline;
  transition: background 0.25s;
}

.post:hover { background: rgba(200, 69, 44, 0.035); }

.post__date {
  text-align: right;
  border-right: 2px solid var(--vermilion);
  padding-right: 1rem;
}

.post__day {
  font-family: var(--serif-display);
  font-weight: 900;
  font-size: 1.7rem;
  display: block;
  line-height: 1;
}

.post__month {
  font-size: 0.78rem;
  color: var(--ink-soft);
  letter-spacing: 0.2em;
}

.post__tag {
  display: inline-block;
  font-size: 0.7rem;
  letter-spacing: 0.25em;
  color: var(--vermilion);
  border: 1px solid var(--vermilion);
  padding: 0.1rem 0.6rem;
  margin-bottom: 0.5rem;
}

.post__title {
  font-family: var(--serif-display);
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.5;
}

.post__title a { text-decoration: none; }
.post__title a:hover { color: var(--vermilion-deep); }

.post__excerpt {
  margin-top: 0.4rem;
  color: var(--ink-soft);
  font-size: 0.92rem;
  max-width: 46em;
}

.post__arrow {
  font-family: var(--serif-display);
  font-size: 1.3rem;
  color: var(--hairline);
  transition: transform 0.3s, color 0.3s;
}

.post:hover .post__arrow {
  color: var(--vermilion);
  transform: translateX(6px);
}

.essays__more { text-align: center; margin-top: 2.6rem; }

.btn-more {
  display: inline-block;
  text-decoration: none;
  font-size: 0.9rem;
  letter-spacing: 0.2em;
  color: var(--ink);
  border: 1px solid var(--ink);
  padding: 0.7rem 2.2rem;
  transition: all 0.3s;
}

.btn-more:hover {
  background: var(--ink);
  color: var(--paper);
  letter-spacing: 0.3em;
}

/* ---------- 关于 ---------- */
.about {
  background: var(--paper-deep);
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
}

.about__inner {
  max-width: 920px;
  margin: 0 auto;
  padding: 3.5rem 2rem;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 3rem;
  align-items: center;
}

.about__seal {
  font-family: var(--serif-display);
  font-weight: 900;
  font-size: 1.6rem;
  line-height: 1.4;
  color: var(--paper);
  background: var(--vermilion);
  padding: 1rem 0.9rem;
  text-align: center;
  box-shadow: 3px 4px 0 rgba(38, 34, 28, 0.2);
  transform: rotate(2deg);
}

.about__text h2 {
  font-family: var(--serif-display);
  font-weight: 900;
  letter-spacing: 0.3em;
  margin-bottom: 1rem;
}

.about__text p { color: var(--ink-soft); margin-bottom: 0.8rem; max-width: 38em; }

/* ---------- 友链 ---------- */
.links__list {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1.2rem;
}

.links__list li {
  border: 1px solid var(--hairline);
  padding: 1.1rem 1.3rem;
  transition: border-color 0.3s, transform 0.3s;
}

.links__list li:hover {
  border-color: var(--vermilion);
  transform: translateY(-3px);
}

.links__list a {
  font-family: var(--serif-display);
  font-weight: 600;
  text-decoration: none;
  display: block;
}

.links__list a:hover { color: var(--vermilion); }

.links__list span {
  font-size: 0.8rem;
  color: var(--ink-soft);
}

/* ---------- 页脚 ---------- */
.footer {
  background: var(--ink);
  color: var(--paper-deep);
  margin-top: 3rem;
}

.footer__inner {
  max-width: 920px;
  margin: 0 auto;
  padding: 3rem 2rem;
}

.footer__quote {
  font-family: var(--serif-display);
  font-style: italic;
  font-size: 1.3rem;
  margin-bottom: 1.8rem;
  color: var(--paper);
}

.footer__cols {
  display: flex;
  justify-content: space-between;
  gap: 2rem;
  flex-wrap: wrap;
  font-size: 0.82rem;
  color: var(--hairline);
  letter-spacing: 0.05em;
}

.footer__cols a { color: var(--vermilion); text-decoration: none; }
.footer__cols a:hover { text-decoration: underline; }

/* ---------- 入场动画 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 720px) {
  .masthead__inner { flex-direction: column; gap: 1rem; }
  .hero { padding-top: 3rem; }
  .hero__title--accent { margin-left: 0.6em; }
  .post { grid-template-columns: 1fr; gap: 0.6rem; }
  .post__date {
    text-align: left;
    border-right: none;
    border-left: 2px solid var(--vermilion);
    padding: 0 0 0 0.8rem;
    display: flex;
    align-items: baseline;
    gap: 0.5rem;
  }
  .post__arrow { display: none; }
  .about__inner { grid-template-columns: 1fr; }
}