/* ============================================
   官网主界面样式 · Sidefolio 式双栏布局
   左栏固定资料 + 右栏内容，配色沿用 tokens
   ============================================ */

/* ---------- 双栏骨架 ---------- */
.sf-layout {
  display: flex;
  min-height: 100vh;
  align-items: stretch;
}

/* ---------- 左侧资料栏 ---------- */
.sf-side {
  width: 400px;
  flex-shrink: 0;
  background: var(--paper-deep);
  border-right: 1px solid var(--paper-line);
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}
.sf-side-inner {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1.1rem;
  padding: 3.2rem 2.6rem 2.2rem;
  height: 100%;
}

.sf-avatar {
  width: 128px;
  height: 128px;
  border-radius: 50%;
  object-fit: cover;
  border: 1px solid var(--gold-soft);
  box-shadow: var(--shadow-1);
  background: var(--paper);
}

.sf-name {
  font-family: var(--font-title);
  font-size: 1.9rem;
  letter-spacing: .14em;
  color: var(--ink);
  line-height: 1.2;
}
.sf-name .accent { color: var(--cinnabar); }

.sf-role {
  font-size: .9rem;
  letter-spacing: .22em;
  color: var(--gold);
  border-bottom: 1px dashed var(--paper-line);
  padding-bottom: .8rem;
}

/* 导航 */
.sf-nav {
  display: flex;
  flex-direction: column;
  gap: .15rem;
  margin-top: 1.2rem;
  width: 100%;
}
.sf-nav a {
  font-family: var(--font-title);
  font-size: 1rem;
  letter-spacing: .18em;
  color: var(--ink-soft);
  padding: .35rem .2rem;
  border-bottom: 1px solid transparent;
  transition: all .2s var(--ease);
}
.sf-nav a:hover {
  color: var(--cinnabar);
  padding-left: .6rem;
  border-bottom-color: var(--gold-soft);
}

/* 左栏底部：工具入口 + 版权 */
.sf-side-foot {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: .5rem;
  width: 100%;
  padding-top: 1.4rem;
  border-top: 1px solid var(--paper-line);
}
.sf-side-foot a {
  font-size: .9rem;
  color: var(--ink-soft);
  letter-spacing: .06em;
  transition: color .2s var(--ease);
}
.sf-side-foot a:hover { color: var(--cinnabar); }
.sf-copy {
  margin-top: .8rem;
  font-size: .74rem;
  color: var(--ink-faint);
  letter-spacing: .08em;
  line-height: 1.9;
}
.sf-copy a { color: var(--ink-faint); }
.sf-copy a:hover { color: var(--cinnabar); }

/* ---------- 右侧内容区 ---------- */
.sf-content {
  flex: 1;
  min-width: 0;
  padding: 4.5rem 5rem 5rem;
  max-width: 900px;
}

/* ---------- 区块 ---------- */
.sf-sec {
  margin-bottom: 4.2rem;
  scroll-margin-top: 2rem;
}
.sf-sec:first-child { margin-top: .2rem; }
.sf-h3 {
  font-family: var(--font-title);
  font-size: 1.35rem;
  letter-spacing: .16em;
  color: var(--ink);
  margin-bottom: 1.6rem;
  padding-bottom: .6rem;
  border-bottom: 1px solid var(--paper-line);
  position: relative;
}
.sf-h3::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 64px;
  height: 2px;
  background: var(--cinnabar);
}

/* ---------- 文字式条目（Sidefolio 风格） ---------- */
.sf-item {
  display: block;
  padding: .9rem .4rem;
  border-bottom: 1px solid var(--paper-line);
  transition: all .2s var(--ease);
  text-decoration: none;
}
a.sf-item:hover {
  padding-left: 1rem;
  border-bottom-color: var(--gold-soft);
}
.sf-item h4 {
  font-family: var(--font-title);
  font-size: 1.12rem;
  letter-spacing: .08em;
  color: var(--ink);
  margin-bottom: .35rem;
  transition: color .2s var(--ease);
}
a.sf-item:hover h4 { color: var(--cinnabar); }
.sf-item p {
  font-size: .92rem;
  color: var(--ink-soft);
  line-height: 1.9;
  margin-bottom: .45rem;
}
.sf-tags {
  display: flex;
  flex-wrap: wrap;
  gap: .45rem;
}
.sf-tags span {
  font-family: var(--font-num);
  font-size: .74rem;
  letter-spacing: .04em;
  color: var(--ink-faint);
  border: 1px solid var(--paper-line);
  border-radius: 2px;
  padding: .08rem .45rem;
  background: var(--paper);
  transition: all .2s var(--ease);
}
a.sf-item:hover .sf-tags span { border-color: var(--gold-soft); color: var(--gold); }

.sf-features {
  list-style: none;
  margin: .4rem 0 .5rem;
  padding: 0;
}
.sf-features li {
  font-size: .9rem;
  color: var(--ink-soft);
  line-height: 1.9;
  padding-left: 1rem;
  position: relative;
}
.sf-features li::before {
  content: "◆";
  position: absolute;
  left: 0;
  font-size: .55rem;
  color: var(--gold);
  top: .18em;
}

/* ---------- 更新日志（简洁列表） ---------- */
.sf-log {
  padding: .9rem .4rem;
  border-bottom: 1px solid var(--paper-line);
}
.sf-log:first-child { border-bottom-color: var(--gold-soft); }
.sf-log-head {
  display: flex;
  align-items: baseline;
  gap: .8rem;
  margin-bottom: .4rem;
  flex-wrap: wrap;
}
.sf-log-ver {
  font-family: var(--font-title);
  font-size: 1.05rem;
  letter-spacing: .1em;
  color: var(--cinnabar);
}
.sf-log-date {
  font-family: var(--font-num);
  font-size: .78rem;
  color: var(--ink-faint);
}
.sf-log ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
.sf-log li {
  font-size: .9rem;
  color: var(--ink-soft);
  line-height: 1.9;
  padding-left: 1rem;
  position: relative;
}
.sf-log li::before {
  content: "—";
  position: absolute;
  left: .1rem;
  color: var(--gold);
}

/* ---------- 响应式 ---------- */
@media (max-width: 900px) {
  .sf-layout { flex-direction: column; }
  .sf-side {
    width: 100%;
    position: static;
    height: auto;
    border-right: none;
    border-bottom: 1px solid var(--paper-line);
  }
  .sf-side-inner {
    padding: 1.8rem 1.6rem 1.4rem;
    align-items: center;
    text-align: center;
    gap: .8rem;
  }
  .sf-avatar { width: 96px; height: 96px; }
  .sf-nav {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    gap: .4rem 1.2rem;
    margin-top: .6rem;
  }
  .sf-nav a { font-size: .92rem; padding: .2rem .1rem; }
  .sf-nav a:hover { padding-left: .2rem; }
  .sf-side-foot {
    margin-top: .8rem;
    align-items: center;
  }
  .sf-content { padding: 2.6rem 1.4rem 3rem; }
  .sf-sec { margin-bottom: 2.8rem; }
}