/* 网易UU远程 · 正式产品官网风（独立体系） */
:root {
  --bg: #f5f7fa;
  --white: #ffffff;
  --text: #1a1a1a;
  --muted: #5c6570;
  --line: #e6eaef;
  --brand: #e60012;
  --brand-dark: #c40010;
  --sky: #eef3f8;
  --sky-deep: #dbe6f2;
  --ink: #111827;
  --ok: #0f766e;
  --wrap: 1120px;
  --font: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --shadow: 0 8px 28px rgba(17, 24, 39, 0.06);
  --radius: 10px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
  font-size: 15px;
}

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

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

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

button {
  font-family: inherit;
}

.wrap {
  width: min(100% - 2rem, var(--wrap));
  margin-inline: auto;
}

/* —— 顶栏：左 Logo / 中导航居中 / 右下载 —— */
.topbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(10px);
  transition: box-shadow 0.25s ease;
}

.topbar.is-scrolled {
  box-shadow: 0 2px 16px rgba(17, 24, 39, 0.06);
}

.topbar-inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  min-height: 64px;
  column-gap: 1rem;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--ink);
  justify-self: start;
}

.logo-mark {
  width: 28px;
  height: 28px;
  border-radius: 6px;
  background: linear-gradient(145deg, #ff3b30, var(--brand));
  color: #fff;
  font-size: 0.72rem;
  font-weight: 900;
  display: grid;
  place-items: center;
  letter-spacing: -0.04em;
}

.menu-btn {
  display: none;
  border: 1px solid var(--line);
  background: var(--white);
  border-radius: 8px;
  padding: 0.4rem 0.7rem;
  font-size: 0.85rem;
  cursor: pointer;
}

.menu {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.15rem 1.35rem;
  flex-wrap: wrap;
  justify-self: center;
  grid-column: 2;
}

.menu a {
  font-size: 0.92rem;
  color: var(--muted);
  padding: 0.35rem 0;
  border-bottom: 2px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.menu a:hover,
.menu a.is-active {
  color: var(--ink);
  border-bottom-color: var(--brand);
}

.top-actions {
  justify-self: end;
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  grid-column: 3;
}

.top-dl {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--brand);
  color: #fff !important;
  padding: 0.45rem 1.05rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.88rem;
  white-space: nowrap;
  transition: background 0.2s ease, transform 0.15s ease;
}

.top-dl:hover {
  background: var(--brand-dark);
  transform: translateY(-1px);
}

/* —— 按钮 —— */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  min-height: 44px;
  padding: 0 1.35rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease, transform 0.15s ease;
}

.btn-primary {
  background: var(--brand);
  color: #fff;
}

.btn-primary:hover {
  background: var(--brand-dark);
  transform: translateY(-1px);
}

.btn-ghost {
  background: var(--white);
  border-color: var(--line);
  color: var(--ink);
}

.btn-ghost:hover {
  border-color: #c5ced8;
  background: #fafbfc;
}

.btn-dark {
  background: var(--ink);
  color: #fff;
}

.btn-dark:hover {
  background: #000;
}

/* —— Hero：居中文案，无右侧面板 —— */
.hero {
  position: relative;
  overflow: hidden;
  background: linear-gradient(180deg, #ffffff 0%, #f7f9fc 100%);
  border-bottom: 1px solid var(--line);
  text-align: center;
}

.hero-inner {
  max-width: 720px;
  margin: 0 auto;
  padding: 4.5rem 0 2.75rem;
}

.hero-kicker {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--brand);
  letter-spacing: 0.06em;
  margin-bottom: 0.85rem;
}

.hero h1 {
  margin: 0 0 1rem;
  font-size: clamp(2rem, 4vw, 2.85rem);
  line-height: 1.22;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.hero-lead {
  margin: 0 auto 1.5rem;
  max-width: 36rem;
  color: var(--muted);
  font-size: 1.05rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1.35rem;
  justify-content: center;
}

.hero-platforms {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.1rem;
  color: var(--muted);
  font-size: 0.86rem;
  justify-content: center;
}

.hero-platforms span {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.hero-platforms span::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--brand);
  opacity: 0.75;
}

.hero-bar {
  border-top: 1px solid var(--line);
  background: var(--white);
}

.hero-bar-inner {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.25rem 0;
}

.hero-bar-inner div {
  flex: 1 1 140px;
  max-width: 200px;
  padding: 1.1rem 0.75rem;
  text-align: center;
}

.hero-bar-inner strong {
  display: block;
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--ink);
}

.hero-bar-inner span {
  font-size: 0.82rem;
  color: var(--muted);
}

/* —— 通用区块 —— */
.section {
  padding: 4rem 0;
}

.section-head {
  text-align: center;
  margin-bottom: 2.25rem;
}

.section-head h2 {
  margin: 0 0 0.55rem;
  font-size: clamp(1.45rem, 2.6vw, 1.85rem);
  font-weight: 800;
  color: var(--ink);
  letter-spacing: -0.015em;
}

.section-head p {
  margin: 0 auto;
  max-width: 36rem;
  color: var(--muted);
}

.section-white {
  background: var(--white);
  border-block: 1px solid var(--line);
}

/* —— 场景：文字 Tab + 无边框内容区 —— */
.scene-tabs {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0;
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--line);
}

.scene-tabs button {
  border: none;
  background: transparent;
  color: var(--muted);
  border-radius: 0;
  padding: 0.85rem 1.35rem;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.scene-tabs button:hover {
  color: var(--ink);
}

.scene-tabs button.is-on {
  background: transparent;
  color: var(--brand);
  border-bottom-color: var(--brand);
}

.scene-panel {
  display: none;
  max-width: 760px;
  margin: 0 auto;
  animation: fadeUp 0.3s ease;
}

.scene-panel.is-on {
  display: block;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.scene-copy {
  padding: 0.25rem 0 0;
  text-align: center;
}

.scene-copy .tag {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--brand);
  margin-bottom: 0.65rem;
}

.scene-copy h3 {
  margin: 0 0 0.7rem;
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--ink);
}

.scene-copy > p {
  margin: 0 auto 1.25rem;
  max-width: 36rem;
  color: var(--muted);
}

.scene-copy ul {
  display: inline-block;
  text-align: left;
  max-width: 28rem;
}

.scene-copy ul li {
  position: relative;
  padding-left: 1.15rem;
  margin-bottom: 0.55rem;
  color: var(--text);
  font-size: 0.95rem;
}

.scene-copy ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--brand);
}

.scene-points {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.35rem 1.5rem;
  margin-top: 1.5rem;
  padding-top: 1.35rem;
  border-top: 1px dashed var(--line);
  color: var(--muted);
  font-size: 0.9rem;
}

.scene-points strong {
  color: var(--ink);
  font-weight: 700;
}

/* —— 能力指标条 —— */
.metrics {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: transparent;
}

.metrics > div {
  flex: 1 1 140px;
  max-width: 220px;
  background: transparent;
  padding: 1.35rem 1rem;
  text-align: center;
}

.metrics strong {
  display: block;
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--ink);
  margin-bottom: 0.25rem;
}

.metrics span {
  color: var(--muted);
  font-size: 0.88rem;
}

/* —— 功能：单列时间线，无卡片 —— */
.feat-list {
  display: block;
  max-width: 720px;
  margin: 0 auto;
  background: transparent;
  border: none;
  border-radius: 0;
}

.feat-item {
  display: grid;
  grid-template-columns: 2.5rem 1fr;
  gap: 0.85rem;
  padding: 1.15rem 0;
  border-bottom: 1px solid var(--line);
  border-right: none;
  align-items: start;
}

.feat-item:last-child {
  border-bottom: none;
}

.feat-item:hover {
  background: transparent;
}

.feat-ico {
  width: auto;
  height: auto;
  border-radius: 0;
  background: transparent;
  color: var(--brand);
  display: block;
  font-weight: 800;
  font-size: 0.95rem;
  padding-top: 0.15rem;
}

.feat-item h3 {
  margin: 0 0 0.3rem;
  font-size: 1.05rem;
  font-weight: 700;
}

.feat-item p {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
}

/* —— 平台：横向文字行，无卡片 —— */
.plat-grid {
  display: block;
  max-width: 820px;
  margin: 0 auto;
  border-top: 1px solid var(--line);
}

.plat-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--line);
  border-radius: 0;
  padding: 1.05rem 0.15rem;
  text-align: left;
}

.plat-card:hover {
  border-color: var(--line);
  box-shadow: none;
  transform: none;
}

.plat-card .os {
  font-weight: 800;
  font-size: 1.02rem;
  margin-bottom: 0.15rem;
  color: var(--ink);
}

.plat-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.86rem;
  min-height: 0;
}

.plat-card .btn {
  width: auto;
  min-height: 38px;
  font-size: 0.86rem;
  flex-shrink: 0;
}

.plat-meta {
  min-width: 0;
}

/* —— 安全信任：一行分隔，无卡片 —— */
.trust-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem 0;
  max-width: 900px;
  margin: 0 auto;
}

.trust-item {
  background: transparent;
  border: none;
  border-radius: 0;
  padding: 0.35rem 1.35rem;
  text-align: center;
  border-right: 1px solid var(--line);
}

.trust-item:last-child {
  border-right: none;
}

.trust-item strong {
  display: block;
  margin-bottom: 0.2rem;
  font-size: 0.98rem;
  color: var(--ink);
}

.trust-item span {
  color: var(--muted);
  font-size: 0.86rem;
}

/* —— 底部 CTA —— */
.cta-band {
  background: linear-gradient(120deg, #1a1a1a 0%, #2a2f36 100%);
  color: #fff;
  padding: 3.25rem 0;
  text-align: center;
}

.cta-band h2 {
  margin: 0 0 0.55rem;
  font-size: 1.65rem;
  font-weight: 800;
}

.cta-band p {
  margin: 0 0 1.35rem;
  color: rgba(255, 255, 255, 0.72);
}

.cta-band .btn-primary {
  box-shadow: 0 8px 24px rgba(230, 0, 18, 0.35);
}

/* —— 页脚 —— */
.footer {
  background: #0f141a;
  color: rgba(255, 255, 255, 0.72);
  padding: 2.75rem 0 1.5rem;
  font-size: 0.88rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer strong {
  display: block;
  color: #fff;
  margin-bottom: 0.85rem;
  font-size: 0.95rem;
}

.footer a {
  display: block;
  margin-bottom: 0.45rem;
  color: rgba(255, 255, 255, 0.65);
  transition: color 0.15s ease;
}

.footer a:hover {
  color: #fff;
}

.footer-brand {
  font-size: 1.05rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 0.55rem;
}

.footer-note {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 1.15rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem;
  color: rgba(255, 255, 255, 0.45);
  font-size: 0.8rem;
}

/* —— 内页 —— */
.page-banner {
  background: linear-gradient(180deg, #fff 0%, var(--sky) 100%);
  border-bottom: 1px solid var(--line);
  padding: 2.75rem 0 2.25rem;
}

.page-banner h1 {
  margin: 0 0 0.55rem;
  font-size: clamp(1.6rem, 3vw, 2rem);
  font-weight: 800;
  color: var(--ink);
}

.page-banner p {
  margin: 0;
  max-width: 40rem;
  color: var(--muted);
}

.page-body {
  padding: 2.5rem 0 3.5rem;
}

.block {
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--line);
  border-radius: 0;
  padding: 1.35rem 0;
  margin-bottom: 0;
}

.block h2 {
  margin: 0 0 0.7rem;
  font-size: 1.15rem;
  font-weight: 800;
}

.block p,
.block li {
  color: var(--muted);
}

.block ul {
  list-style: disc;
  padding-left: 1.2rem;
}

.block li {
  margin-bottom: 0.4rem;
}

.dl-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
}

.dl-table th,
.dl-table td {
  padding: 1rem 1.1rem;
  text-align: left;
  border-bottom: 1px solid var(--line);
}

.dl-table th {
  background: #f8fafc;
  font-size: 0.85rem;
  color: var(--muted);
  font-weight: 600;
}

.dl-table tr:last-child td {
  border-bottom: none;
}

.dl-table td:first-child {
  font-weight: 700;
  color: var(--ink);
}

.steps {
  counter-reset: step;
}

.steps li {
  position: relative;
  padding: 1.15rem 0.15rem 1.15rem 3.2rem;
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--line);
  border-radius: 0;
  margin-bottom: 0;
  color: var(--text);
  list-style: none;
}

.steps li::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  left: 1rem;
  top: 1.05rem;
  width: 1.7rem;
  height: 1.7rem;
  border-radius: 50%;
  background: var(--brand);
  color: #fff;
  font-size: 0.85rem;
  font-weight: 700;
  display: grid;
  place-items: center;
}

.steps strong {
  display: block;
  margin-bottom: 0.25rem;
}

.faq details {
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--line);
  border-radius: 0;
  padding: 1rem 0;
  margin-bottom: 0;
}

.faq summary {
  cursor: pointer;
  font-weight: 700;
  color: var(--ink);
  list-style: none;
}

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

.faq details[open] summary {
  margin-bottom: 0.55rem;
  color: var(--brand);
}

.faq details p {
  margin: 0;
  color: var(--muted);
  font-size: 0.94rem;
}

.scene-stack {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.scene-row {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 1.25rem;
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--line);
  border-radius: 0;
  padding: 1.35rem 0.15rem;
  align-items: start;
}

.scene-row .label {
  font-weight: 800;
  color: var(--brand);
  font-size: 1.05rem;
}

.scene-row h3 {
  margin: 0 0 0.4rem;
  font-size: 1.08rem;
}

.scene-row p {
  margin: 0;
  color: var(--muted);
}

/* —— 动效 —— */
@media (prefers-reduced-motion: no-preference) {
  .hero-inner {
    animation: fadeUp 0.5s ease;
  }
}

/* —— 响应式 —— */
@media (max-width: 980px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .scene-row {
    grid-template-columns: 1fr;
  }

  .trust-item {
    border-right: none;
    flex: 1 1 40%;
  }
}

@media (max-width: 860px) {
  .topbar-inner {
    grid-template-columns: 1fr auto;
    row-gap: 0;
  }

  .logo {
    grid-column: 1;
  }

  .top-actions {
    grid-column: 2;
  }

  .menu {
    display: none;
    grid-column: 1 / -1;
    justify-self: stretch;
    flex-direction: column;
    align-items: stretch;
    padding: 0.35rem 0 0.85rem;
    gap: 0;
    border-top: 1px solid var(--line);
    margin-top: 0.35rem;
  }

  .menu.is-open {
    display: flex;
  }

  .menu a {
    padding: 0.7rem 0;
    border-bottom: 1px solid var(--line);
    text-align: left;
  }

  .menu-btn {
    display: inline-flex;
  }
}

@media (max-width: 720px) {
  .plat-card {
    flex-direction: column;
    align-items: flex-start;
  }

  .trust-item {
    flex: 1 1 100%;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--line);
  }

  .trust-item:last-child {
    border-bottom: none;
  }

  .hero-inner {
    padding: 2.75rem 0 2.25rem;
  }

  .hero-bar-inner div {
    flex: 1 1 45%;
  }
}