/* 网易UU远程 · 瑞士海报式排版 · 全新结构（不沿用旧模板） */
:root {
  --bg: #fafafa;
  --fg: #111;
  --mute: #555;
  --line: #111;
  --red: #e60012;
  --gap: clamp(1.25rem, 3vw, 2.5rem);
  --w: 920px;
  --font: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  color: var(--fg);
  background: var(--bg);
  line-height: 1.55;
  font-size: 16px;
}

a {
  color: inherit;
  text-decoration: none;
}

ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

.frame {
  width: min(100% - 2.5rem, var(--w));
  margin-inline: auto;
}

/* —— 顶栏：左对齐，无居中胶囊导航 —— */
.mast {
  border-bottom: 3px solid var(--line);
  background: #fff;
}

.mast-row {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.1rem 0 0.9rem;
  flex-wrap: wrap;
}

.mark {
  display: flex;
  align-items: baseline;
  gap: 0.55rem;
  font-weight: 900;
  font-size: 1.15rem;
  letter-spacing: -0.03em;
}

.mark b {
  display: inline-block;
  width: 0.85rem;
  height: 0.85rem;
  background: var(--red);
  flex-shrink: 0;
  align-self: center;
}

.links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.15rem 1.1rem;
  font-size: 0.875rem;
}

.links a {
  color: var(--mute);
  border-bottom: 2px solid transparent;
  padding-bottom: 2px;
}

.links a:hover,
.links a.cur {
  color: var(--fg);
  border-bottom-color: var(--red);
}

.go {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.4rem;
  padding: 0 1.1rem;
  background: var(--red);
  color: #fff !important;
  font-size: 0.8125rem;
  font-weight: 800;
  border: 2px solid var(--red);
  letter-spacing: 0.04em;
}

.go:hover {
  background: #fff;
  color: var(--red) !important;
}

.go-ghost {
  background: transparent;
  color: var(--fg) !important;
  border-color: var(--line);
}

.go-ghost:hover {
  background: var(--fg);
  color: #fff !important;
  border-color: var(--fg);
}

.burger {
  display: none;
  width: 2.5rem;
  height: 2.5rem;
  border: 2px solid var(--line);
  background: #fff;
  cursor: pointer;
}

.burger i {
  display: block;
  width: 1rem;
  height: 2px;
  margin: 3px auto;
  background: var(--fg);
}

.row-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* —— 首屏：单栏巨字，无设备假图 —— */
.blast {
  padding: clamp(3rem, 8vw, 5.5rem) 0 clamp(2.5rem, 6vw, 4rem);
  border-bottom: 3px solid var(--line);
  background: #fff;
}

.blast .eyebrow {
  margin: 0 0 1rem;
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--red);
}

.blast h1 {
  margin: 0 0 0.75rem;
  font-size: clamp(2.8rem, 9vw, 5.5rem);
  line-height: 0.95;
  font-weight: 900;
  letter-spacing: -0.05em;
  max-width: 8em;
}

.blast h1 span {
  color: var(--red);
}

.blast .lede {
  margin: 0 0 1.75rem;
  max-width: 28em;
  font-size: 1.05rem;
  color: var(--mute);
}

.acts {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

/* —— 红底信号条 —— */
.signal {
  background: var(--red);
  color: #fff;
  padding: 1.25rem 0;
  border-bottom: 3px solid var(--line);
}

.signal-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.signal strong {
  display: block;
  font-size: 1.35rem;
  font-weight: 900;
  letter-spacing: -0.02em;
}

.signal span {
  font-size: 0.8125rem;
  opacity: 0.9;
}

/* —— 章节 —— */
.chunk {
  padding: clamp(2.5rem, 5vw, 4rem) 0;
  border-bottom: 3px solid var(--line);
}

.chunk h2 {
  margin: 0 0 0.35rem;
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 900;
  letter-spacing: -0.03em;
}

.chunk .sub {
  margin: 0 0 1.75rem;
  color: var(--mute);
  max-width: 36em;
}

/* 定义表式功能（非卡片宫格） */
.pairs {
  display: grid;
  gap: 0;
  border-top: 2px solid var(--line);
}

.pair {
  display: grid;
  grid-template-columns: minmax(7rem, 11rem) 1fr;
  gap: 1rem;
  padding: 1.1rem 0;
  border-bottom: 1px solid #ccc;
}

.pair dt {
  margin: 0;
  font-weight: 800;
  font-size: 0.95rem;
}

.pair dd {
  margin: 0;
  color: var(--mute);
  font-size: 0.95rem;
}

/* 场景：竖排编号列表 */
.slots {
  counter-reset: slot;
  display: grid;
  gap: 0;
}

.slot {
  counter-increment: slot;
  display: grid;
  grid-template-columns: 3.5rem 1fr;
  gap: 1rem;
  padding: 1.25rem 0;
  border-top: 2px solid var(--line);
}

.slot:last-child {
  border-bottom: 2px solid var(--line);
}

.slot::before {
  content: counter(slot, decimal-leading-zero);
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--red);
  line-height: 1.1;
}

.slot h3 {
  margin: 0 0 0.25rem;
  font-size: 1.05rem;
}

.slot p {
  margin: 0;
  color: var(--mute);
  font-size: 0.9rem;
}

/* 平台：纯文字斜杠分隔 */
.plats {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.plats span + span::before {
  content: " / ";
  color: var(--red);
  font-weight: 400;
}

/* CTA 墨色条 */
.ink {
  background: var(--fg);
  color: #fff;
  padding: 2.5rem 0;
  border-bottom: 3px solid var(--line);
}

.ink h2 {
  margin: 0 0 0.4rem;
  font-size: 1.6rem;
  font-weight: 900;
}

.ink p {
  margin: 0 0 1.25rem;
  opacity: 0.7;
}

.ink .go-ghost {
  color: #fff !important;
  border-color: rgba(255, 255, 255, 0.45);
}

.ink .go-ghost:hover {
  background: #fff;
  color: var(--fg) !important;
}

/* 内页头 */
.ph {
  padding: 2.5rem 0 1.5rem;
  border-bottom: 3px solid var(--line);
  background: #fff;
}

.ph .eyebrow {
  margin: 0 0 0.5rem;
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.18em;
  color: var(--red);
}

.ph h1 {
  margin: 0 0 0.5rem;
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 900;
  letter-spacing: -0.03em;
}

.ph p {
  margin: 0;
  color: var(--mute);
  max-width: 38em;
}

/* 下载行 */
.rows {
  border-top: 2px solid var(--line);
}

.row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  padding: 1.15rem 0;
  border-bottom: 1px solid #ccc;
}

.row h3 {
  margin: 0 0 0.2rem;
  font-size: 1.05rem;
}

.row p {
  margin: 0;
  color: var(--mute);
  font-size: 0.875rem;
}

/* 步骤 */
.flow {
  counter-reset: flow;
}

.flow li {
  counter-increment: flow;
  display: grid;
  grid-template-columns: 2.5rem 1fr;
  gap: 0.75rem;
  padding: 1rem 0;
  border-bottom: 1px solid #ccc;
}

.flow li::before {
  content: counter(flow);
  font-weight: 900;
  font-size: 1.25rem;
  color: var(--red);
}

.flow h3 {
  margin: 0 0 0.2rem;
  font-size: 1rem;
}

.flow p {
  margin: 0;
  color: var(--mute);
  font-size: 0.9rem;
}

/* FAQ 纯边框 */
.ask details {
  border-bottom: 1px solid #ccc;
}

.ask summary {
  padding: 1rem 0;
  cursor: pointer;
  font-weight: 800;
  list-style: none;
}

.ask summary::-webkit-details-marker {
  display: none;
}

.ask details[open] summary {
  color: var(--red);
}

.ask p {
  margin: 0 0 1rem;
  color: var(--mute);
  font-size: 0.925rem;
}

.two {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

.two h3 {
  margin: 0 0 0.75rem;
  font-size: 1rem;
  border-bottom: 2px solid var(--line);
  padding-bottom: 0.4rem;
}

.two li {
  margin-bottom: 0.4rem;
  color: var(--mute);
  font-size: 0.9rem;
}

.two li::before {
  content: "— ";
  color: var(--red);
}

.tbl {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.tbl th,
.tbl td {
  padding: 0.75rem 0.5rem;
  border-bottom: 1px solid #ccc;
  text-align: left;
  vertical-align: top;
}

.tbl th {
  width: 28%;
  font-weight: 800;
}

/* 页脚 */
.end {
  padding: 2rem 0 1.5rem;
  background: #fff;
  font-size: 0.8rem;
  color: var(--mute);
}

.end-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}

.end strong {
  display: block;
  color: var(--fg);
  font-size: 0.95rem;
  margin-bottom: 0.4rem;
}

.end a {
  display: block;
  margin-bottom: 0.35rem;
}

.end a:hover {
  color: var(--red);
}

.end-bot {
  padding-top: 1rem;
  border-top: 2px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  justify-content: space-between;
}

@media (max-width: 720px) {
  .burger {
    display: grid;
    place-items: center;
  }

  .row-actions .go {
    display: none;
  }

  .links {
    display: none;
    width: 100%;
    flex-direction: column;
    gap: 0.75rem;
    padding: 0.75rem 0 1rem;
    border-top: 1px solid #ddd;
  }

  .links.show {
    display: flex;
  }

  .mast-row {
    align-items: center;
  }

  .signal-grid,
  .two,
  .end-grid,
  .pair {
    grid-template-columns: 1fr;
  }
}