@charset "UTF-8";
/* ==========================================================================
   WhatsApp 网页版 · 群组公告板（Group Noticeboard）
   设计方向：软木公告板 + 便签纸 + 图钉 + 胶带
   米板底 + 白/黄/绿/粉便签 + 衬线标题 + 微倾斜
   无圆角大卡片、无渐变装饰。所有颜色走变量。
   ========================================================================== */

:root {
  --board: #e3d7be;
  --board-2: #d6c7a6;
  --paper: #fffdf6;
  --note-y: #fff6c8;
  --note-g: #e4efe0;
  --note-p: #fbe3dd;
  --note-b: #e6edf5;
  --ink: #2b2519;
  --ink-2: #4a4235;
  --muted: #7c7160;
  --pin: #b8342a;
  --accent: #9c4a2f;
  --line: #cfc2a4;
  --line-2: #b8a884;
  --dark: #2b2519;

  --serif: Georgia, "Times New Roman", "Songti SC", "SimSun", "STSong", serif;
  --sans: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
  --mono: Consolas, "SFMono-Regular", Menlo, "Liberation Mono", monospace;

  --fs-2xs: 0.71rem;
  --fs-xs: 0.79rem;
  --fs-sm: 0.88rem;
  --fs-base: 1.01rem;
  --fs-md: 1.12rem;
  --fs-lg: 1.3rem;
  --fs-xl: clamp(1.38rem, 2.1vw, 1.72rem);
  --fs-2xl: clamp(1.58rem, 2.8vw, 2.1rem);
  --fs-3xl: clamp(1.88rem, 3.6vw, 2.8rem);
}

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

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

body {
  margin: 0;
  color: var(--ink);
  font-family: var(--sans);
  font-size: var(--fs-base);
  line-height: 1.76;
  background-color: var(--board);
  background-image:
    repeating-linear-gradient(0deg, rgba(255, 255, 255, .07) 0 1px, transparent 1px 30px),
    repeating-linear-gradient(90deg, rgba(255, 255, 255, .07) 0 1px, transparent 1px 30px),
    radial-gradient(circle at 18% 12%, rgba(190, 165, 120, .35), transparent 45%),
    radial-gradient(circle at 82% 78%, rgba(190, 165, 120, .3), transparent 45%);
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid rgba(156, 74, 47, .35);
}
a:hover { color: #7a3420; border-bottom-color: #7a3420; }

code {
  font-family: var(--mono);
  font-size: 0.87em;
  background: #f3ecdb;
  border: 1px solid var(--line);
  padding: 0.04em 0.32em;
}

strong { font-weight: 700; color: #1e1a11; }

ul, ol { margin: 0; padding-left: 1.2em; }
li { margin: 0.34em 0; }

.wrap {
  width: min(1140px, calc(100% - 2.4rem));
  margin-inline: auto;
}

/* ---------- 顶栏 ---------- */
.topbar {
  background: var(--dark);
  color: var(--board);
  position: sticky;
  top: 0;
  z-index: 30;
  box-shadow: 0 2px 10px -4px rgba(50, 38, 18, .6);
}
.topbar-in {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  min-height: 60px;
  flex-wrap: wrap;
}
.brand {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  border-bottom: 0;
  color: #f3ecd9;
  flex: none;
}
.brand-mark {
  width: 28px;
  height: 28px;
  background: var(--note-y);
  color: var(--dark);
  display: grid;
  place-items: center;
  font-family: var(--serif);
  font-size: 0.7rem;
  font-weight: 700;
  transform: rotate(-3deg);
  flex: none;
}
.brand-name {
  font-family: var(--serif);
  font-size: 1.02rem;
  letter-spacing: 0.03em;
  line-height: 1.15;
}
.brand-name span {
  display: block;
  font-family: var(--mono);
  font-size: 0.56rem;
  letter-spacing: 0.18em;
  color: #a2937a;
  text-transform: uppercase;
}
.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.05rem;
  margin-left: auto;
  font-size: var(--fs-xs);
}
.nav a {
  border-bottom: 0;
  color: #cabba0;
  padding: 0.4rem 0.55rem;
}
.nav a:hover { color: var(--note-y); background: rgba(255, 255, 255, .07); }
.nav a[aria-current="page"] {
  color: var(--dark);
  background: var(--note-y);
  font-weight: 700;
  transform: rotate(-1deg);
}
.topcta {
  border: 1px solid #6b5f47;
  color: #ded1b8;
  font-size: var(--fs-xs);
  padding: 0.36rem 0.7rem;
  border-bottom: 1px solid #6b5f47;
  flex: none;
}
.topcta:hover { background: var(--note-y); color: var(--dark); border-color: var(--note-y); }

/* ---------- 首屏 ---------- */
.hero { padding: clamp(2.1rem, 4.4vw, 3.6rem) 0 clamp(1.8rem, 3.6vw, 2.8rem); }
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: clamp(1.8rem, 4vw, 3.2rem);
  align-items: start;
}
.kicker {
  display: inline-block;
  font-family: var(--mono);
  font-size: var(--fs-2xs);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-2);
  background: var(--paper);
  padding: 0.26rem 0.6rem;
  box-shadow: 0 2px 6px -3px rgba(60, 45, 20, .55);
  transform: rotate(-1deg);
}
.hero h1 {
  font-family: var(--serif);
  font-size: var(--fs-3xl);
  line-height: 1.24;
  letter-spacing: 0.004em;
  margin: 0.9rem 0 1rem;
  font-weight: 400;
  text-wrap: balance;
}
.nb { display: inline-block; }
.h1-eye {
  display: block;
  font-family: var(--mono);
  font-size: 0.4em;
  letter-spacing: 0.16em;
  color: var(--accent);
  margin-bottom: 0.28em;
  text-transform: uppercase;
}
.hero-lead {
  font-size: var(--fs-md);
  color: var(--ink-2);
  max-width: 34em;
  margin: 0 0 1.4rem;
}
.acts { display: flex; flex-wrap: wrap; gap: 0.55rem; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: var(--fs-sm);
  font-weight: 600;
  padding: 0.6rem 1rem;
  background: var(--paper);
  color: var(--ink);
  border: 1px solid var(--line-2);
  border-bottom: 1px solid var(--line-2);
  box-shadow: 0 3px 10px -6px rgba(60, 45, 20, .8);
}
.btn:hover { background: #fff; color: var(--accent); border-color: var(--accent); }
.btn-solid {
  background: var(--dark);
  color: var(--note-y);
  border-color: var(--dark);
}
.btn-solid:hover { background: var(--accent); border-color: var(--accent); color: #fff; }

/* 首屏右侧：公告便签 */
.pinned {
  background: var(--note-y);
  padding: 1.5rem 1.3rem 1.2rem;
  transform: rotate(1.1deg);
  box-shadow: 0 2px 0 rgba(0, 0, 0, .05), 0 14px 26px -14px rgba(60, 45, 20, .75);
  position: relative;
}
.pinned::before {
  content: "";
  position: absolute;
  top: -11px;
  left: 50%;
  margin-left: -8px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: radial-gradient(circle at 34% 30%, #e8735f, #9e2c1d 72%);
  box-shadow: 0 4px 7px rgba(70, 25, 15, .45);
}
.pinned h2 {
  font-family: var(--serif);
  font-size: 1.12rem;
  font-weight: 400;
  letter-spacing: 0.04em;
  margin: 0 0 0.15rem;
}
.pinned .sub {
  font-family: var(--mono);
  font-size: 0.58rem;
  letter-spacing: 0.18em;
  color: #9a8a5f;
  text-transform: uppercase;
  margin: 0 0 0.85rem;
}
.pinned ol {
  margin: 0;
  padding-left: 1.15em;
  font-size: var(--fs-sm);
  color: #4c442c;
}
.pinned li { margin: 0.42em 0; }
.pinned .sig {
  margin: 0.9rem 0 0;
  padding-top: 0.6rem;
  border-top: 1px dashed #d6c483;
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  color: #9a8a5f;
  text-transform: uppercase;
}

/* ---------- 数据条 ---------- */
.strip {
  background: var(--dark);
  color: #d9cdb4;
  padding: 0.1rem 0;
}
.strip-in { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); }
.metric {
  padding: 0.9rem 1rem;
  border-right: 1px solid rgba(255, 255, 255, .12);
}
.metric:last-child { border-right: 0; }
.metric b {
  display: block;
  font-family: var(--mono);
  font-size: clamp(1.2rem, 2.1vw, 1.66rem);
  color: var(--note-y);
  line-height: 1.1;
  font-weight: 400;
}
.metric span { display: block; font-size: var(--fs-xs); color: #a2937a; margin-top: 0.22rem; line-height: 1.5; }

/* ---------- 章节 ---------- */
.sec { padding: clamp(2.1rem, 4.2vw, 3.2rem) 0; }
.sec-head {
  display: flex;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 0.7rem 0.9rem;
  margin-bottom: 1.5rem;
}
.sec-tag {
  font-family: var(--mono);
  font-size: var(--fs-2xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  background: var(--note-y);
  padding: 0.28rem 0.62rem;
  transform: rotate(-1.6deg);
  box-shadow: 0 3px 8px -5px rgba(60, 45, 20, .8);
  flex: none;
}
.sec-tag.g { background: var(--note-g); }
.sec-tag.p { background: var(--note-p); }
.sec-title {
  font-family: var(--serif);
  font-size: var(--fs-xl);
  line-height: 1.34;
  margin: 0;
  font-weight: 400;
  letter-spacing: 0.01em;
  flex: 1 1 100%;
}
.sec-sub {
  margin: 0;
  color: var(--ink-2);
  font-size: var(--fs-sm);
  max-width: 46em;
  flex: 1 1 100%;
}

/* ---------- 便签卡 ---------- */
.grid { display: grid; gap: 1rem; }
.g2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.g3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.note {
  background: var(--paper);
  padding: 1.15rem 1.1rem 1.2rem;
  position: relative;
  box-shadow: 0 1px 0 rgba(0, 0, 0, .05), 0 10px 20px -14px rgba(60, 45, 20, .85);
  transform: rotate(-0.35deg);
}
.note:nth-child(even) { transform: rotate(0.45deg); }
.note.y { background: var(--note-y); }
.note.g { background: var(--note-g); }
.note.p { background: var(--note-p); }
.note.b { background: var(--note-b); }
.note::before {
  content: "";
  position: absolute;
  top: -9px;
  left: 50%;
  margin-left: -7px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: radial-gradient(circle at 34% 30%, #e8735f, #9e2c1d 72%);
  box-shadow: 0 3px 6px rgba(70, 25, 15, .4);
}
.note.taped::before {
  width: 56px;
  height: 17px;
  margin-left: -28px;
  top: -10px;
  border-radius: 1px;
  background: rgba(232, 221, 190, .82);
  box-shadow: 0 1px 3px rgba(80, 60, 30, .22);
  transform: rotate(-2.5deg);
}
.note h3 {
  margin: 0 0 0.4rem;
  font-family: var(--serif);
  font-size: var(--fs-md);
  font-weight: 400;
  line-height: 1.42;
  letter-spacing: 0.01em;
}
.note p { margin: 0 0 0.55rem; color: var(--ink-2); font-size: var(--fs-sm); }
.note p:last-child { margin-bottom: 0; }
.note .tag {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.64rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #6b5c40;
  border-bottom: 1px dotted #b3a68d;
  padding-bottom: 0.1rem;
  margin-bottom: 0.35rem;
}

/* ---------- 三条横条 ---------- */
.bars { display: grid; gap: 0.75rem; }
.bar {
  background: var(--paper);
  padding: 0.9rem 1rem;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.9rem;
  align-items: start;
  box-shadow: 0 8px 18px -14px rgba(60, 45, 20, .85);
  border-left: 3px solid var(--accent);
}
.bar .no {
  font-family: var(--mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.08em;
  color: var(--accent);
  padding-top: 0.15rem;
}
.bar h3 {
  margin: 0 0 0.25rem;
  font-family: var(--serif);
  font-size: var(--fs-md);
  font-weight: 400;
  line-height: 1.4;
}
.bar p { margin: 0 0 0.35rem; color: var(--ink-2); font-size: var(--fs-sm); }
.bar p:last-child { margin-bottom: 0; }

/* ---------- 表格 ---------- */
.tbl-wrap { overflow-x: auto; max-width: 100%; background: var(--paper); box-shadow: 0 10px 22px -16px rgba(60, 45, 20, .9); }
.tbl { width: 100%; min-width: 32rem; border-collapse: collapse; font-size: var(--fs-sm); }
.tbl caption {
  caption-side: top;
  text-align: left;
  padding: 0.6rem 0.85rem;
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  border-bottom: 1px solid var(--line);
}
.tbl th, .tbl td { text-align: left; padding: 0.6rem 0.85rem; border-bottom: 1px dashed var(--line); vertical-align: top; }
.tbl thead th {
  background: #f3ecdb;
  color: var(--ink);
  font-weight: 700;
  font-size: var(--fs-xs);
  letter-spacing: 0.04em;
}
.tbl tbody tr:last-child td { border-bottom: 0; }
.tbl tbody tr:hover { background: #fdf9ec; }
.tbl td:first-child { font-weight: 600; }

/* ---------- 提示 ---------- */
.note-box {
  background: var(--note-p);
  padding: 0.9rem 1rem;
  font-size: var(--fs-sm);
  color: #4d3a33;
  margin-block: 1.1rem;
  box-shadow: 0 8px 18px -14px rgba(60, 45, 20, .9);
  transform: rotate(-0.3deg);
}
.note-box b { color: #33241f; }
.note-box.alt { background: var(--note-g); color: #35422f; }

/* ---------- 相关 ---------- */
.related { margin-top: 1.7rem; }
.related h2 {
  font-family: var(--mono);
  font-size: 0.64rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 0.6rem;
  font-weight: 400;
}
.related ul { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0.4rem 1.2rem; }
.related li { margin: 0; }
.related a { display: flex; align-items: baseline; gap: 0.45rem; font-size: var(--fs-sm); border-bottom: 0; }
.related a::before { content: "·"; color: var(--accent); font-weight: 700; }
.related a:hover::before { color: var(--pin); }

/* ---------- 页脚 ---------- */
.foot { background: var(--dark); color: #b7a98d; padding: 1.8rem 0 2rem; margin-top: 1rem; }
.foot-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) repeat(2, minmax(0, 1fr));
  gap: 1.6rem;
}
.foot h2 {
  font-family: var(--mono);
  font-size: 0.63rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: #8b7d63;
  margin: 0 0 0.55rem;
  font-weight: 400;
}
.foot p { margin: 0; font-size: var(--fs-sm); max-width: 30em; }
.foot ul { list-style: none; margin: 0; padding: 0; }
.foot li { margin: 0.28rem 0; }
.foot a { font-size: var(--fs-sm); color: #cabba0; border-bottom: 1px solid rgba(255, 255, 255, .16); }
.foot a:hover { color: var(--note-y); border-bottom-color: var(--note-y); }
.foot-bottom {
  margin-top: 1.3rem;
  padding-top: 0.8rem;
  border-top: 1px solid rgba(255, 255, 255, .12);
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  color: #7d7159;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.2rem;
  justify-content: space-between;
}

/* ---------- 404 ---------- */
.err {
  min-height: 56vh;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  place-items: center;
  padding: 3rem 0;
  text-align: center;
}
.err .no {
  font-family: var(--mono);
  font-size: clamp(2.4rem, 8vw, 4.4rem);
  letter-spacing: -0.02em;
  line-height: 1;
  margin: 0;
  color: var(--accent);
}
.err h1 { font-family: var(--serif); font-weight: 400; font-size: var(--fs-2xl); margin: 0.6rem 0; }
.err p { color: var(--ink-2); margin: 0 auto 1.4rem; max-width: 34em; }
.err .acts { justify-content: center; }

/* ---------- 响应式 ---------- */
@media (max-width: 980px) {
  .g3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .foot-grid { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
  .foot-grid > div:first-child { grid-column: 1 / -1; }
}

@media (max-width: 899px) {
  .hero-grid { grid-template-columns: minmax(0, 1fr); }
  .pinned { max-width: 28rem; }
}

@media (max-width: 760px) {
  .g2, .g3 { grid-template-columns: minmax(0, 1fr); }
  .strip-in { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .metric:nth-child(2) { border-right: 0; }
  .metric:nth-child(1), .metric:nth-child(2) { border-bottom: 1px solid rgba(255, 255, 255, .12); }
  .related ul { grid-template-columns: minmax(0, 1fr); }
  .nav { order: 3; margin-left: 0; width: 100%; flex-wrap: wrap; padding-bottom: 0.25rem; }
  .nav a { padding: 0.34rem 0.46rem; }
  .topcta { order: 2; margin-left: auto; }
  .note, .note:nth-child(even) { transform: none; }
  .pinned { transform: none; }
}

@media (max-width: 600px) {
  .foot-grid { grid-template-columns: minmax(0, 1fr); }
  .foot-grid > div:first-child { grid-column: auto; }
  .acts .btn { flex: 1 1 100%; justify-content: center; }
  .bar { grid-template-columns: minmax(0, 1fr); gap: 0.3rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}