/* loufengziyuan.lat — 站点样式
   设计来源：本地 UI 快照的浅色论坛主题（见内部 tokens 记录）
   浅色底 + 深色字；所有颜色走 :root token，正文 16px 起，行高 1.75 */

:root {
  --bg: #eef1f6;
  --surface: #ffffff;
  --surface-2: #f4f6fa;
  --line: #dfe4ec;
  --ink: #16181d;
  --ink-2: #3d434d;
  --ink-3: #5a6169;
  --primary: #0a58ca;
  --primary-strong: #073f92;
  --primary-tint: #e7effc;
  --mark: #0b6b39;
  --mark-tint: #e5f3ea;
  --warn-tint: #fdf1e2;
  --warn-ink: #7d4306;
  --warn-line: #eed9b8;
  --danger-tint: #fdecef;
  --danger-ink: #a3123a;
  --danger-line: #f3ccd4;
  --cta-bg: #0a3f8f;
  --cta-ink: #ffffff;
  --cta-seep: #5b9bf5;
  --cta-rung: #a9c9f4;
  --header-h: 60px;
  --cta-h: 58px;
  --radius: 10px;
  --shadow: 0 1px 2px rgba(22, 24, 29, .06);
  --shadow-lg: 0 6px 18px rgba(22, 24, 29, .08);
  --wrap: 1180px;
  --font: system-ui, -apple-system, "Segoe UI", "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", "Source Han Sans SC", sans-serif;
}

*,
*::before,
*::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  padding-top: var(--header-h);
  padding-bottom: calc(var(--cta-h) + 30px + env(safe-area-inset-bottom));
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  overflow-wrap: anywhere;
}

h1 { font-size: 28px; line-height: 1.3; margin: 0 0 12px; }
h2 { font-size: 20px; line-height: 1.35; margin: 0 0 10px; }
h3 { font-size: 17px; line-height: 1.4; margin: 0 0 8px; }
h4 { font-size: 16px; line-height: 1.4; margin: 0 0 6px; }

p, ul, ol, dl, dd, dt, blockquote, figure { margin: 0 0 12px; }
ul, ol { padding-left: 22px; }
li { margin-bottom: 6px; }
li > ul, li > ol { margin-top: 6px; }

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

img { max-width: 100%; height: auto; }

:focus-visible { outline: 3px solid var(--primary); outline-offset: 2px; }

.skip {
  position: absolute; left: -9999px; top: 0;
  background: var(--surface); color: var(--ink); padding: 10px 14px; border-radius: 8px; z-index: 200;
}
.skip:focus { left: 12px; top: 8px; }

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 16px; }
@media (min-width: 768px) { .wrap { padding: 0 20px; } }

/* ---------- header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 60;
  background: var(--surface);
  border-bottom: 1px solid var(--line);
}
.head-inner { display: flex; align-items: center; gap: 10px; min-height: var(--header-h); }
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); font-weight: 700; }
.brand:hover { text-decoration: none; }
.brand img { display: block; width: 34px; height: 34px; border-radius: 9px; flex: 0 0 auto; }
.brand-text { font-size: 17px; line-height: 1.2; }
.main-nav { display: none; margin-left: 6px; flex-wrap: wrap; gap: 2px; }
.main-nav a {
  display: block; padding: 8px 10px; border-radius: 8px;
  color: var(--ink-2); font-size: 15px; line-height: 1.4;
}
.main-nav a:hover { background: var(--surface-2); color: var(--primary-strong); text-decoration: none; }
.main-nav a[aria-current="page"] { background: var(--primary-tint); color: var(--primary-strong); font-weight: 700; }
.head-tools { margin-left: auto; display: flex; align-items: center; gap: 8px; }
.btn-quiet {
  font: inherit; font-size: 15px; cursor: pointer;
  background: var(--surface-2); color: var(--ink-2);
  border: 1px solid var(--line); border-radius: 8px; padding: 7px 12px;
}
.btn-quiet:hover { background: var(--primary-tint); color: var(--primary-strong); }
@media (min-width: 1080px) {
  .main-nav { display: flex; }
  .btn-quiet { display: none; }
}

/* ---------- drawer ---------- */
.drawer {
  position: fixed; inset: var(--header-h) 0 0 0; z-index: 80;
  background: rgba(22, 24, 29, .38);
}
.drawer[hidden] { display: none; }
.drawer-panel {
  background: var(--surface); max-height: 100%; overflow-y: auto;
  padding: 14px 16px 24px; box-shadow: var(--shadow-lg);
}
.drawer-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 10px; }
.drawer-head h2 { margin: 0; font-size: 17px; }
.drawer-nav { list-style: none; padding: 0; margin: 0 0 14px; }
.drawer-nav a { display: block; padding: 10px 12px; border-radius: 8px; color: var(--ink-2); font-size: 16px; }
.drawer-nav a:hover { background: var(--surface-2); text-decoration: none; }
.drawer-nav a[aria-current="page"] { background: var(--primary-tint); color: var(--primary-strong); font-weight: 700; }

/* ---------- layout ---------- */
.layout {
  display: grid; gap: 18px; padding: 18px 0 10px;
  grid-template-columns: minmax(0, 1fr);
}
@media (min-width: 768px) { .layout { grid-template-columns: minmax(0, 1fr) 282px; align-items: start; } }
@media (min-width: 1080px) { .layout { grid-template-columns: 238px minmax(0, 1fr) 286px; } }
.col-side, .col-main, .board-rail { min-width: 0; }
.board-rail { display: none; }
@media (min-width: 1080px) {
  .board-rail { display: block; position: sticky; top: calc(var(--header-h) + 18px); }
}
.col-side { display: grid; gap: 16px; align-content: start; }
@media (min-width: 1080px) { .col-main { grid-column: 2; } .col-side { grid-column: 3; } }
@media (min-width: 1080px) { .board-rail { grid-column: 1; grid-row: 1 / span 2; } .col-main { grid-row: 1; } .col-side { grid-row: 1; } }

/* ---------- cards ---------- */
.card {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden;
}
.card + .card { margin-top: 16px; }
.card-head {
  display: flex; align-items: center; flex-wrap: wrap; gap: 10px;
  padding: 13px 16px; border-bottom: 1px solid var(--line); background: var(--surface);
}
.card-head h2, .card-head h3 { margin: 0; }
.card-head .link-more { margin-left: auto; font-size: 15px; }
.card-body { padding: 16px; }
.card-body > :last-child { margin-bottom: 0; }
.card-foot {
  padding: 12px 16px; border-top: 1px solid var(--line);
  background: var(--surface-2); font-size: 14px; color: var(--ink-3);
}

.lede { font-size: 17px; color: var(--ink-2); }

/* ---------- hero ---------- */
.hero { padding: 22px 0 4px; }
.hero h1 { margin-bottom: 10px; }
.hero .lede { max-width: 62ch; }

/* ---------- chips ---------- */
.chips { display: flex; flex-wrap: wrap; gap: 6px; padding: 0; margin: 0 0 12px; list-style: none; }
.chips li { margin: 0; }
.chip {
  display: inline-block; padding: 4px 11px; border-radius: 999px;
  background: var(--primary-tint); color: var(--primary-strong);
  font-size: 14px; line-height: 1.6;
}
.chip--mark { background: var(--mark-tint); color: var(--mark); }
.chip--plain { background: var(--surface-2); color: var(--ink-2); }

/* ---------- notice ---------- */
.notice {
  display: flex; flex-wrap: wrap; gap: 4px 10px; align-items: baseline;
  margin: 14px 0 0; padding: 11px 14px;
  background: var(--warn-tint); color: var(--warn-ink);
  border: 1px solid var(--warn-line); border-radius: var(--radius);
  font-size: 15px;
}
.notice strong { color: var(--warn-ink); }
.notice a { color: var(--warn-ink); text-decoration: underline; }

/* ---------- tabs ---------- */
.tabs { display: flex; flex-wrap: wrap; gap: 4px; }
.tabs button {
  font: inherit; font-size: 15px; cursor: pointer;
  background: none; border: 0; border-radius: 8px 8px 0 0;
  padding: 8px 12px 10px; color: var(--ink-2);
}
.tabs button[aria-selected="true"] {
  color: var(--primary-strong); font-weight: 700;
  box-shadow: inset 0 -4px 0 var(--primary);
}
.tab-panel[hidden] { display: none; }

/* ---------- board index ---------- */
.board-grid {
  display: grid; gap: 4px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
@media (min-width: 560px) { .board-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
@media (min-width: 1080px) { .board-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); } }
.board-rail .board-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.board-grid a {
  display: flex; align-items: center; gap: 6px;
  padding: 7px 9px; border-radius: 8px;
  color: var(--ink-2); font-size: 15px; line-height: 1.5;
}
.board-grid a:hover { background: var(--primary-tint); color: var(--primary-strong); text-decoration: none; }
.board-grid img { display: block; width: 18px; height: 18px; flex: 0 0 auto; opacity: .65; }
.board-rail .board-grid img { display: none; }

/* ---------- post feed ---------- */
.feed { display: grid; gap: 12px; }
.post {
  display: grid; grid-template-columns: 42px minmax(0, 1fr); gap: 12px;
  padding: 14px; border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--surface);
}
.post-mark {
  width: 42px; height: 42px; border-radius: 10px;
  background: var(--primary-tint); display: flex; align-items: center; justify-content: center;
}
.post-mark img { display: block; width: 22px; height: 22px; opacity: .75; }
.post-meta { display: flex; flex-wrap: wrap; gap: 4px 10px; font-size: 13.5px; color: var(--ink-3); margin-bottom: 6px; }
.post-title { font-size: 17px; line-height: 1.45; margin: 0 0 8px; }
.post-title a { color: var(--ink); }
.post-tags { display: flex; flex-wrap: wrap; gap: 6px; margin: 0; padding: 0; list-style: none; }
.post-tags li { margin: 0; }
.post-tags span {
  display: inline-block; padding: 2px 9px; border-radius: 999px;
  background: var(--surface-2); color: var(--ink-2); font-size: 13.5px;
}
.post-foot { display: flex; flex-wrap: wrap; gap: 6px 14px; margin-top: 8px; font-size: 13.5px; color: var(--ink-3); }

/* ---------- tables ---------- */
.table-wrap { overflow-x: auto; margin: 0 0 12px; }
table { width: 100%; border-collapse: collapse; font-size: 15px; }
caption { text-align: left; padding: 0 0 8px; color: var(--ink-3); font-size: 14px; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
thead th { background: var(--surface-2); font-weight: 700; white-space: normal; }
tbody tr:last-child th, tbody tr:last-child td { border-bottom: 0; }
td code, p code, li code {
  background: var(--surface-2); border: 1px solid var(--line);
  border-radius: 6px; padding: 1px 6px; font-size: 14px;
}

/* ---------- risk blocks ---------- */
.risk {
  background: var(--danger-tint); border: 1px solid var(--danger-line);
  border-radius: var(--radius); padding: 14px;
}
.risk h3 { color: var(--danger-ink); }
.risk > :last-child { margin-bottom: 0; }

.plain-list { list-style: none; padding: 0; }
.plain-list > li { margin-bottom: 12px; }
.plain-list > li > strong { display: block; color: var(--ink); }
.mini-list { margin: 0 0 12px; }
.mini-list > li { margin-bottom: 4px; }
.mini-list a { color: var(--ink-2); font-size: 15px; }
.mini-list a:hover { color: var(--primary-strong); }

/* ---------- steps ---------- */
.steps { list-style: none; padding: 0; counter-reset: step; }
.steps > li { position: relative; padding: 0 0 0 42px; margin-bottom: 14px; counter-increment: step; }
.steps > li::before {
  content: counter(step);
  position: absolute; left: 0; top: 2px;
  width: 28px; height: 28px; border-radius: 999px;
  background: var(--primary-tint); color: var(--primary-strong);
  font-size: 15px; font-weight: 700; line-height: 28px; text-align: center;
}

/* ---------- levels ---------- */
.levels { display: grid; gap: 8px; padding: 0; margin: 0; list-style: none; }
.levels li { display: grid; gap: 4px; padding: 10px 12px; border: 1px solid var(--line); border-radius: 8px; background: var(--surface); }
.levels b { color: var(--primary-strong); }

/* ---------- faq ---------- */
.faq { display: grid; gap: 10px; }
.faq details { border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.faq summary {
  cursor: pointer; padding: 12px 14px; font-weight: 700; font-size: 16px; line-height: 1.5;
  border-radius: var(--radius);
}
.faq summary::marker { color: var(--primary); }
.faq .faq-body { padding: 0 14px 14px; color: var(--ink-2); }
.faq .faq-body > :last-child { margin-bottom: 0; }

/* ---------- CTA card / inline link blocks ---------- */
.jump { display: flex; flex-wrap: wrap; gap: 8px 14px; padding: 0; margin: 0; list-style: none; }
.jump li { margin: 0; }

/* ---------- footer ---------- */
.site-footer {
  margin-top: 26px; padding: 22px 0 26px;
  background: var(--surface); border-top: 1px solid var(--line);
  font-size: 14.5px; color: var(--ink-3);
}
.foot-grid { display: grid; gap: 20px; }
@media (min-width: 768px) { .foot-grid { grid-template-columns: 1.4fr 1fr 1fr; } }
.site-footer h2 { font-size: 15px; margin: 0 0 8px; color: var(--ink); }
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer li { margin-bottom: 6px; }
.brand-link { font-size: 17px; font-weight: 700; color: var(--ink); }
.foot-note { margin-top: 18px; padding-top: 14px; border-top: 1px solid var(--line); }

/* ---------- 404 ---------- */
.center-card { max-width: 620px; margin: 48px auto; }

/* ---------- CTA ---------- */
.site-cta {
  position: fixed; left: 50%; bottom: calc(14px + env(safe-area-inset-bottom));
  transform: translateX(-50%);
  z-index: 90;
  display: flex; align-items: center; justify-content: center;
  width: calc(100% - 32px); max-width: 520px; min-height: var(--cta-h);
  padding: 0 22px;
  background: var(--cta-bg); color: var(--cta-ink);
  border-radius: 14px; overflow: hidden;
  font-size: 17px; font-weight: 600; line-height: 1.4; text-align: center;
  box-shadow: 0 10px 26px rgba(10, 63, 143, .28);
}
.site-cta:hover { background: var(--primary-strong); text-decoration: none; }
.site-cta > span { position: relative; z-index: 1; }
.site-cta::before {
  content: "";
  position: absolute; inset: 0;
  background: radial-gradient(118% 168% at 50% 132%, var(--cta-seep) 0%, rgba(91, 155, 245, 0) 72%);
  opacity: 0;
  transform: scale(1);
  animation: cta-seep 3.2s cubic-bezier(.2, .7, .3, 1) infinite;
}
.site-cta::after {
  content: "";
  position: absolute; left: 28px; right: 28px; bottom: 9px; height: 3px;
  border-radius: 2px;
  background-image: linear-gradient(90deg,
      var(--cta-rung) 0 20%, transparent 20% 40%,
      var(--cta-rung) 40% 60%, transparent 60% 80%,
      var(--cta-rung) 80% 100%);
  transform: scaleY(0);
  transform-origin: bottom;
  animation: cta-rung 3.2s cubic-bezier(.2, .7, .3, 1) infinite;
}
@keyframes cta-seep {
  0%, 44% { opacity: 0; transform: scale(1); }
  62% { opacity: .28; transform: scale(1.05); }
  84%, 100% { opacity: 0; transform: scale(1.05); }
}
@keyframes cta-rung {
  0%, 56% { opacity: 1; transform: scaleY(0); }
  72% { opacity: 1; transform: scaleY(1); }
  90%, 100% { opacity: .3; transform: scaleY(1); }
}
@media (prefers-reduced-motion: reduce) {
  .site-cta::before { animation: none; opacity: .18; transform: scale(1); }
  .site-cta::after { animation: none; opacity: .65; transform: scaleY(1); }
}

@media (min-width: 1080px) {
  .site-cta { min-height: 60px; font-size: 18px; max-width: 540px; }
}

/* 窄屏：CTA 近全宽并保留安全边距，正文与按钮字号不缩到难读 */
@media (max-width: 400px) {
  .site-cta { font-size: 16px; padding: 0 14px; }
  .brand-text { font-size: 16px; }
  h1 { font-size: 24px; }
}