/* 示例律师事务所 · Swiss Modern
   黑 / 白 + 唯一点缀色红 #E30613。无渐变、无阴影、无圆角。 */

:root {
  --black: #000;
  --white: #fff;
  --red: #E30613;
  --grey: #6b6b6b;
  --rule: #000;
  --gutter: 24px;
  --margin: 48px;
  --max: 1344px;
  --font: "Helvetica Neue", Helvetica, Arial, "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
}

*, *::before, *::after { box-sizing: border-box; border-radius: 0; }

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

body {
  margin: 0;
  background: var(--white);
  color: var(--black);
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
a:hover { color: var(--red); }

h1, h2, h3, h4, p, ul, ol, dl, dd { margin: 0; padding: 0; }
ul, ol { list-style: none; }

/* ---------- 网格 ---------- */

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--margin);
}

.grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  column-gap: var(--gutter);
}

.c-1-3  { grid-column: 1 / span 3; }
.c-4-9  { grid-column: 4 / span 9; }
.c-4-6  { grid-column: 4 / span 6; }
.c-1-6  { grid-column: 1 / span 6; }
.c-7-6  { grid-column: 7 / span 6; }
.c-1-12 { grid-column: 1 / -1; }

/* ---------- 页头 ---------- */

.site-header {
  border-bottom: 1px solid var(--rule);
}

.site-header .grid {
  align-items: center;
  height: 88px;
}

.brand {
  grid-column: 1 / span 4;
  display: flex;
  align-items: center;
  gap: 14px;
  font-weight: 700;
  font-size: 16px;
  letter-spacing: 0.02em;
}

.brand-mark {
  width: 20px;
  height: 20px;
  background: var(--red);
  flex: none;
}

.brand:hover { color: var(--black); }

.nav {
  grid-column: 5 / -1;
  display: flex;
  justify-content: flex-end;
  gap: 36px;
  font-size: 14px;
  font-weight: 500;
}

.nav a {
  padding: 4px 0;
  border-bottom: 2px solid transparent;
}

.nav a[aria-current="page"] {
  border-bottom-color: var(--red);
}

.nav-toggle {
  display: none;
  grid-column: 12 / 13;
  justify-self: end;
  background: none;
  border: 1px solid var(--black);
  font: inherit;
  font-size: 13px;
  font-weight: 700;
  padding: 6px 10px;
  cursor: pointer;
}

/* ---------- 页面标题区 ---------- */

.hero {
  padding: 120px 0 96px;
  border-bottom: 1px solid var(--rule);
}

.eyebrow {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.eyebrow.red { color: var(--red); }

.display {
  font-size: clamp(44px, 7.2vw, 104px);
  line-height: 1.02;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.title {
  font-size: clamp(36px, 5vw, 72px);
  line-height: 1.05;
  font-weight: 700;
  letter-spacing: -0.015em;
}

.lead {
  font-size: 18px;
  line-height: 1.65;
  max-width: 40em;
}

.hero .eyebrow { margin-bottom: 32px; }
.hero .lead { margin-top: 48px; }

.red { color: var(--red); }

/* ---------- 区块 ---------- */

.section {
  padding: 96px 0;
  border-bottom: 1px solid var(--rule);
}

.section-head {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding-top: 6px;
}

.section-head .num {
  display: block;
  color: var(--red);
  margin-bottom: 8px;
}

.h2 {
  font-size: 32px;
  line-height: 1.2;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 32px;
}

.h3 {
  font-size: 20px;
  line-height: 1.3;
  font-weight: 700;
}

.small {
  font-size: 13px;
  line-height: 1.6;
}

.muted { color: var(--grey); }

.prose p + p { margin-top: 1em; }

/* ---------- 编号列表（业务索引） ---------- */

.index-list li {
  border-top: 1px solid var(--rule);
}

.index-list li:last-child { border-bottom: 1px solid var(--rule); }

.index-list a {
  display: grid;
  grid-template-columns: 80px 1fr auto;
  align-items: baseline;
  gap: var(--gutter);
  padding: 22px 0;
}

.index-list .n {
  font-size: 13px;
  font-weight: 700;
  color: var(--red);
}

.index-list .t {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.005em;
}

.index-list .arrow { font-size: 18px; }

/* ---------- 卡片网格（无阴影，仅细线） ---------- */

.cells {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--rule);
  border-left: 1px solid var(--rule);
}

.cells.three { grid-template-columns: repeat(3, 1fr); }

.cell {
  border-right: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  padding: 28px 24px 36px;
  min-height: 220px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.cell .n {
  font-size: 12px;
  font-weight: 700;
  color: var(--red);
}

/* ---------- 数字 ---------- */

.figures {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  column-gap: var(--gutter);
}

.figure { border-top: 4px solid var(--black); padding-top: 16px; }

.figure .v {
  font-size: clamp(48px, 6vw, 88px);
  line-height: 1;
  font-weight: 700;
  letter-spacing: -0.03em;
}

.figure .v .red { font-size: 0.5em; vertical-align: top; }

.figure .k { margin-top: 12px; font-size: 13px; }

/* ---------- 业务详情 ---------- */

.practice {
  padding: 80px 0;
  border-bottom: 1px solid var(--rule);
  scroll-margin-top: 24px;
}

.practice .big-n {
  font-size: 88px;
  line-height: 0.9;
  font-weight: 700;
  color: var(--red);
  letter-spacing: -0.04em;
}

.practice .h2 { margin-bottom: 20px; }

.practice .scope {
  margin-top: 36px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  column-gap: var(--gutter);
}

.scope-col h4 {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--rule);
  margin-bottom: 12px;
}

.scope-col li {
  font-size: 14px;
  padding: 6px 0 6px 18px;
  position: relative;
}

.scope-col li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 15px;
  width: 8px;
  height: 2px;
  background: var(--black);
}

/* ---------- 团队 ---------- */

.people {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  column-gap: var(--gutter);
  row-gap: 64px;
}

.person .portrait {
  aspect-ratio: 4 / 5;
  background: var(--black);
  color: var(--white);
  display: flex;
  align-items: flex-end;
  padding: 20px;
  font-size: 64px;
  font-weight: 700;
  line-height: 1;
  margin-bottom: 20px;
}

.person.accent .portrait { background: var(--red); }

.person .role {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--red);
  margin-bottom: 6px;
}

.person .h3 { margin-bottom: 10px; }

.person dl {
  margin-top: 14px;
  border-top: 1px solid var(--rule);
  font-size: 13px;
}

.person dl div {
  display: grid;
  grid-template-columns: 72px 1fr;
  padding: 8px 0;
  border-bottom: 1px solid var(--rule);
}

.person dt { font-weight: 700; }

/* ---------- 新闻 ---------- */

.news-list li {
  border-top: 1px solid var(--rule);
  padding: 36px 0;
}

.news-list li:last-child { border-bottom: 1px solid var(--rule); }

.news-item {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  column-gap: var(--gutter);
}

.news-item .date {
  grid-column: 1 / span 2;
  font-size: 13px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.news-item .cat {
  grid-column: 3 / span 2;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--red);
}

.news-item .body { grid-column: 5 / -1; }
.news-item .h3 { margin-bottom: 10px; }

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  margin-bottom: 48px;
  border: 1px solid var(--black);
  width: max-content;
  max-width: 100%;
}

.filters button {
  font: inherit;
  font-size: 13px;
  font-weight: 700;
  background: var(--white);
  color: var(--black);
  border: 0;
  border-right: 1px solid var(--black);
  padding: 10px 18px;
  cursor: pointer;
}

.filters button:last-child { border-right: 0; }
.filters button[aria-pressed="true"] { background: var(--black); color: var(--white); }

/* ---------- 表格式信息 ---------- */

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.table th, .table td {
  text-align: left;
  vertical-align: top;
  padding: 14px 0;
  border-top: 1px solid var(--rule);
}

.table tr:last-child th, .table tr:last-child td { border-bottom: 1px solid var(--rule); }
.table th { width: 30%; font-weight: 700; padding-right: var(--gutter); }

/* ---------- 表单 ---------- */

.form { display: grid; gap: 28px; }

.field label {
  display: block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  margin-bottom: 8px;
}

.field input, .field select, .field textarea {
  width: 100%;
  font: inherit;
  font-size: 15px;
  color: var(--black);
  background: var(--white);
  border: 0;
  border-bottom: 1px solid var(--black);
  padding: 10px 0;
  outline: none;
  appearance: none;
}

.field textarea { min-height: 120px; resize: vertical; }

.field input:focus, .field select:focus, .field textarea:focus {
  border-bottom: 2px solid var(--red);
  padding-bottom: 9px;
}

.btn {
  display: inline-block;
  font: inherit;
  font-size: 14px;
  font-weight: 700;
  background: var(--black);
  color: var(--white);
  border: 1px solid var(--black);
  padding: 16px 32px;
  cursor: pointer;
  justify-self: start;
}

.btn:hover { background: var(--red); border-color: var(--red); color: var(--white); }

.btn.ghost { background: var(--white); color: var(--black); }
.btn.ghost:hover { background: var(--black); color: var(--white); border-color: var(--black); }

.form-note { font-size: 13px; min-height: 1.6em; }

/* ---------- 红色色块 ---------- */

.band {
  background: var(--red);
  color: var(--white);
  padding: 96px 0;
}

.band a:hover { color: var(--black); }

.band .btn { background: var(--white); color: var(--black); border-color: var(--white); }
.band .btn:hover { background: var(--black); color: var(--white); border-color: var(--black); }

/* ---------- 页脚 ---------- */

.site-footer {
  padding: 64px 0 48px;
  font-size: 13px;
}

.site-footer .grid { row-gap: 32px; }

.site-footer h4 {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  margin-bottom: 12px;
}

.site-footer li { padding: 2px 0; }

.footer-base {
  margin-top: 56px;
  padding-top: 20px;
  border-top: 1px solid var(--rule);
  display: flex;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
  color: var(--grey);
}

.f-1 { grid-column: 1 / span 4; }
.f-2 { grid-column: 5 / span 3; }
.f-3 { grid-column: 8 / span 2; }
.f-4 { grid-column: 10 / span 3; }

/* ---------- 间距工具 ---------- */

.mt-16 { margin-top: 16px; }
.mt-32 { margin-top: 32px; }
.mt-48 { margin-top: 48px; }
.mt-64 { margin-top: 64px; }

/* ---------- 响应式 ---------- */

@media (max-width: 1024px) {
  :root { --margin: 32px; }
  .cells { grid-template-columns: repeat(2, 1fr); }
  .figures { grid-template-columns: repeat(2, 1fr); row-gap: 40px; }
  .people { grid-template-columns: repeat(2, 1fr); }
  .nav { gap: 24px; }
}

@media (max-width: 760px) {
  :root { --margin: 20px; --gutter: 16px; }
  body { font-size: 14px; }

  .c-1-3, .c-4-9, .c-4-6, .c-1-6, .c-7-6 { grid-column: 1 / -1; }
  .c-4-9, .c-4-6, .c-7-6 { margin-top: 24px; }

  .site-header .grid { height: 68px; }
  .brand { grid-column: 1 / span 10; }
  .nav-toggle { display: block; }
  .nav {
    display: none;
    grid-column: 1 / -1;
    flex-direction: column;
    gap: 0;
    padding-bottom: 12px;
  }
  .nav.open { display: flex; }
  .nav a { padding: 12px 0; border-bottom: 1px solid var(--rule); }
  .nav a[aria-current="page"] { color: var(--red); border-bottom-color: var(--rule); }
  .site-header .grid:has(.nav.open) { height: auto; padding-top: 22px; }

  .hero { padding: 72px 0 56px; }
  .section, .band { padding: 64px 0; }
  .practice { padding: 56px 0; }
  .practice .big-n { font-size: 56px; }
  .practice .scope { grid-template-columns: 1fr; row-gap: 24px; }

  .cells, .cells.three { grid-template-columns: 1fr; }
  .cell { min-height: 0; }
  .people { grid-template-columns: 1fr; }

  .index-list a { grid-template-columns: 48px 1fr auto; }
  .index-list .t { font-size: 18px; }

  .news-item .date, .news-item .cat { grid-column: span 6; }
  .news-item .body { grid-column: 1 / -1; margin-top: 12px; }

  .f-1, .f-2, .f-3, .f-4 { grid-column: 1 / -1; }
  .table th { width: 38%; }
}