/* ============================================================
   1DAO.CC · 高校学生研究通道 (/research/)
   与主站 style.css 同一视觉体系;本文件只负责"课题"相关组件
   ============================================================ */

/* ---------- 状态颜色 ---------- */
:root {
  --r-open:    var(--accent);            /* 征集中 */
  --r-doing:   var(--amber);             /* 研究中 */
  --r-done:    #7fd8a8;                  /* 已有结论 */
  --r-archived:#8a95a3;                  /* 已归档 */
}

/* ---------- 页头内紧凑 hero ---------- */
.r-hero { padding: 168px 0 54px; }
.r-hero .kicker { margin-bottom: 20px; }
.r-hero h1 {
  font-family: var(--serif); font-weight: 400;
  font-size: clamp(34px, 6vw, 62px); line-height: 1.2; letter-spacing: 5px;
}
.r-hero .r-sub { margin-top: 22px; max-width: 660px; font-size: 16px; color: var(--muted); }
.r-hero .r-actions { margin-top: 34px; display: flex; gap: 16px; flex-wrap: wrap; }

/* ---------- 求真声明条 ---------- */
.r-truth {
  margin-top: 44px; border: 1px solid rgba(111,195,223,.3); border-radius: 3px;
  background: linear-gradient(135deg, rgba(111,195,223,.08), rgba(17,24,33,.5) 55%);
  padding: 26px 30px;
}
.r-truth h2 {
  font-family: var(--serif); font-size: 17px; letter-spacing: 3px;
  color: var(--accent); margin-bottom: 14px;
}
.r-truth ol { list-style: none; display: grid; gap: 10px; }
.r-truth li { display: flex; gap: 14px; font-size: 14px; color: var(--muted); line-height: 1.85; }
.r-truth li b { color: var(--text); font-weight: 400; flex: none; font-family: Georgia, serif; letter-spacing: 1px; }

/* ---------- 课题卡片 ---------- */
.r-group { margin-top: 64px; }
.r-group-title {
  font-family: var(--serif); font-size: 19px; letter-spacing: 4px;
  padding-bottom: 14px; border-bottom: 1px solid var(--line);
  display: flex; align-items: baseline; gap: 14px; flex-wrap: wrap;
}
.r-group-title .r-count { font-family: Georgia, serif; font-size: 13px; color: var(--muted); letter-spacing: 1px; }
.r-list { display: grid; gap: 18px; margin-top: 24px; }
.r-card {
  display: block; border: 1px solid var(--line); border-radius: 3px;
  background: rgba(17,24,33,.4); padding: 28px 30px;
  transition: transform .3s, border-color .3s;
}
.r-card:hover { transform: translateY(-3px); border-color: rgba(111,195,223,.45); }
.r-card h3 { font-family: var(--serif); font-size: 21px; letter-spacing: 2px; line-height: 1.5; margin-bottom: 10px; }
.r-card p { font-size: 14.5px; color: var(--muted); line-height: 1.85; }
.r-card-meta { display: flex; flex-wrap: wrap; gap: 10px 14px; align-items: center; margin-top: 18px; }
.r-card-more { margin-left: auto; font-size: 13px; letter-spacing: 1px; color: var(--accent); }

/* ---------- 徽标 / 标签 ---------- */
.r-badge {
  font-size: 12px; letter-spacing: 2px; border-radius: 999px; padding: 4px 14px;
  border: 1px solid currentColor; white-space: nowrap;
}
.r-badge.open { color: var(--r-open); }
.r-badge.doing { color: var(--r-doing); }
.r-badge.done { color: var(--r-done); }
.r-badge.archived { color: var(--r-archived); }
.r-tag {
  font-size: 12px; letter-spacing: 2px; color: var(--muted);
  border: 1px solid var(--line); border-radius: 999px; padding: 4px 14px;
}
.r-date { font-family: Georgia, serif; font-size: 13px; color: var(--muted); letter-spacing: 1px; }

/* ---------- 空状态 ---------- */
.r-empty {
  margin-top: 30px; border: 1px dashed var(--line); border-radius: 3px;
  padding: 56px 34px; text-align: center; background: rgba(17,24,33,.35);
}
.r-empty .r-empty-mark { font-family: Georgia, serif; font-size: 40px; color: var(--accent); opacity: .8; line-height: 1; }
.r-empty h3 { font-family: var(--serif); font-size: 20px; letter-spacing: 3px; margin: 20px 0 12px; }
.r-empty p { font-size: 14.5px; color: var(--muted); max-width: 520px; margin: 0 auto; line-height: 1.9; }
.r-empty .r-actions { margin-top: 26px; display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* ---------- 详情页 ---------- */
.r-crumb { margin-top: 150px; font-size: 13px; letter-spacing: 1px; color: var(--muted); }
.r-crumb a { border-bottom: 1px solid rgba(138,149,163,.35); }
.r-crumb a:hover { color: var(--accent); border-color: var(--accent); }
.r-crumb .sep { margin: 0 10px; opacity: .5; }
.r-head { margin-top: 26px; }
.r-head h1 { font-family: var(--serif); font-weight: 400; font-size: clamp(28px, 5vw, 46px); line-height: 1.3; letter-spacing: 3px; }
.r-head .r-meta { display: flex; flex-wrap: wrap; gap: 10px 14px; align-items: center; margin-top: 22px; }

.r-body { max-width: 780px; margin-top: 46px; }
.r-body h2, .r-conclusion h2 {
  font-family: var(--serif); font-size: 22px; letter-spacing: 3px; font-weight: 400;
  margin: 46px 0 16px; padding-left: 16px; border-left: 2px solid var(--accent);
}
.r-body h2:first-child { margin-top: 0; }
.r-body h3, .r-conclusion h3 { font-family: var(--serif); font-size: 17px; letter-spacing: 2px; margin: 26px 0 10px; }
.r-body p, .r-conclusion p { font-size: 15.5px; color: var(--muted); line-height: 1.95; margin-bottom: 16px; }
.r-body strong, .r-conclusion strong { color: var(--text); font-weight: 400; }
.r-body ul, .r-body ol, .r-conclusion ul, .r-conclusion ol { margin: 0 0 18px 22px; display: grid; gap: 9px; }
.r-body li, .r-conclusion li { font-size: 15px; color: var(--muted); line-height: 1.9; }
.r-body a, .r-conclusion a { color: var(--accent); border-bottom: 1px solid rgba(111,195,223,.4); }
.r-body code, .r-conclusion code {
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 13.5px; color: var(--accent);
  background: rgba(232,237,242,.06); border: 1px solid var(--line); border-radius: 2px; padding: 1px 6px;
}
.r-body blockquote, .r-conclusion blockquote {
  border-left: 2px solid var(--amber); padding: 4px 0 4px 18px; margin: 0 0 18px;
}
.r-body blockquote p, .r-conclusion blockquote p { margin: 0; }
.r-body hr, .r-conclusion hr { border: none; border-top: 1px dashed var(--line); margin: 34px 0; }
.r-body table, .r-conclusion table { width: 100%; border-collapse: collapse; margin: 0 0 22px; font-size: 14px; }
.r-body th, .r-body td, .r-conclusion th, .r-conclusion td {
  text-align: left; padding: 11px 14px; border-bottom: 1px solid var(--line); color: var(--muted); vertical-align: top;
}
.r-body th, .r-conclusion th { color: var(--text); font-weight: 400; letter-spacing: 2px; font-size: 13px; }

/* 核心问题块 */
.r-questions {
  margin-top: 40px; border: 1px solid rgba(217,160,91,.35); border-radius: 3px;
  background: linear-gradient(135deg, rgba(217,160,91,.07), rgba(17,24,33,.5) 60%);
  padding: 26px 30px;
}
.r-questions h2 { font-family: var(--serif); font-size: 17px; letter-spacing: 3px; color: var(--amber); margin-bottom: 14px; }
.r-questions ol { margin-left: 22px; display: grid; gap: 10px; }
.r-questions li { font-size: 15px; color: var(--text); line-height: 1.9; }

/* 结论区 */
.r-conclusion {
  margin-top: 56px; border: 1px solid rgba(127,216,168,.35); border-radius: 3px;
  background: linear-gradient(180deg, rgba(127,216,168,.06), rgba(17,24,33,.45) 40%);
  padding: 34px 34px 20px;
}
.r-conclusion-head {
  display: flex; align-items: center; gap: 14px; flex-wrap: wrap;
  padding-bottom: 18px; border-bottom: 1px solid rgba(127,216,168,.25);
}
.r-conclusion-head .r-k { font-family: var(--serif); font-size: 20px; letter-spacing: 3px; color: var(--r-done); }
.r-conclusion-head .r-note { font-size: 12.5px; color: var(--muted); letter-spacing: 1px; }
.r-conclusion h2 { border-left-color: var(--r-done); margin-top: 34px; }
.r-pending {
  margin-top: 56px; border: 1px dashed rgba(217,160,91,.35); border-radius: 3px;
  padding: 28px 30px; background: rgba(17,24,33,.35);
}
.r-pending h2 { font-family: var(--serif); font-size: 17px; letter-spacing: 3px; color: var(--amber); margin-bottom: 12px; }
.r-pending p { font-size: 14.5px; color: var(--muted); line-height: 1.9; }

/* 修订历史 */
.r-revisions { margin-top: 56px; }
.r-revisions h2 { font-family: var(--serif); font-size: 19px; letter-spacing: 3px; margin-bottom: 16px; }
.r-revisions table { width: 100%; border-collapse: collapse; font-size: 14px; }
.r-revisions th, .r-revisions td { text-align: left; padding: 12px 14px; border-bottom: 1px solid var(--line); color: var(--muted); }
.r-revisions th { color: var(--text); font-weight: 400; letter-spacing: 2px; font-size: 13px; }
.r-revisions td:first-child { font-family: Georgia, serif; color: var(--accent); white-space: nowrap; }

/* 底部操作 */
.r-foot-actions { margin-top: 56px; display: flex; gap: 16px; flex-wrap: wrap; align-items: center; }

/* ---------- 说明页 ---------- */
.r-about { max-width: 800px; margin-top: 46px; }
.r-about h2 { font-family: var(--serif); font-size: 22px; letter-spacing: 3px; font-weight: 400; margin: 44px 0 16px; padding-left: 16px; border-left: 2px solid var(--accent); }
.r-about h3 { font-family: var(--serif); font-size: 17px; letter-spacing: 2px; margin: 26px 0 10px; }
.r-about p { font-size: 15.5px; color: var(--muted); line-height: 1.95; margin-bottom: 16px; }
.r-about ul, .r-about ol { margin: 0 0 18px 22px; display: grid; gap: 9px; }
.r-about li { font-size: 15px; color: var(--muted); line-height: 1.9; }
.r-about strong { color: var(--text); font-weight: 400; }
.r-about a { color: var(--accent); border-bottom: 1px solid rgba(111,195,223,.4); }
.r-about code { font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-size: 13.5px; color: var(--accent); background: rgba(232,237,242,.06); border: 1px solid var(--line); border-radius: 2px; padding: 1px 6px; }
.r-about hr { border: none; border-top: 1px dashed var(--line); margin: 34px 0; }
.r-about table { width: 100%; border-collapse: collapse; margin: 0 0 22px; font-size: 14px; }
.r-about th, .r-about td { text-align: left; padding: 11px 14px; border-bottom: 1px solid var(--line); color: var(--muted); }
.r-about th { color: var(--text); font-weight: 400; letter-spacing: 2px; font-size: 13px; }

/* ---------- 宣传素材入口 ---------- */
.r-materials {
  margin-top: 58px; display: flex; align-items: center; gap: 24px; flex-wrap: wrap;
  justify-content: space-between; border: 1px solid var(--line); border-radius: 3px;
  background: rgba(17,24,33,.4); padding: 26px 30px;
}
.r-materials-k {
  display: block; font-family: var(--serif); font-size: 17px; letter-spacing: 3px;
  color: var(--accent); margin-bottom: 8px;
}
.r-materials p { font-size: 14.5px; color: var(--muted); line-height: 1.85; max-width: 620px; }

/* ---------- 响应式 ---------- */
@media (max-width: 640px) {
  .r-hero { padding: 132px 0 40px; }
  .r-crumb { margin-top: 116px; }
  .r-card { padding: 22px 20px; }
  .r-card-more { margin-left: 0; }
  .r-conclusion { padding: 24px 20px 12px; }
  .r-truth { padding: 22px 20px; }
  .r-body table, .r-conclusion table, .r-about table { font-size: 13px; }
  .r-revisions { overflow-x: auto; }
}