:root {
  --help-font: "Source Han Sans SC", "思源黑体", "Noto Sans CJK SC", "Noto Sans SC", "Microsoft YaHei", Arial, sans-serif;
  --help-bg: #06101f;
  --help-panel: rgba(10, 24, 48, 0.76);
  --help-panel-strong: rgba(15, 34, 66, 0.94);
  --help-border: rgba(111, 167, 235, 0.24);
  --help-cyan: #6fe7ff;
  --help-blue: #7aa8ff;
  --help-pink: #ff6f9a;
  --help-green: #42e6b7;
  --help-yellow: #ffd166;
  --help-text: #f4f8ff;
  --help-soft: #c6d7f3;
  --help-muted: #96a9cf;
}

.help-body {
  min-width: 0;
  overflow-x: hidden;
  color: var(--help-text);
  font-family: var(--help-font);
  font-weight: 400;
  background:
    radial-gradient(900px 680px at 10% 0%, rgba(38, 96, 144, 0.32), transparent 70%),
    radial-gradient(780px 700px at 92% 8%, rgba(132, 72, 160, 0.24), transparent 70%),
    linear-gradient(180deg, #06101f 0%, #071426 46%, #06101f 100%);
}

.help-body * {
  font-family: var(--help-font);
}

.help-page {
  min-height: 100vh;
  padding: 132px 44px 80px;
}

.help-nav.nav-glass {
  width: calc(100vw - 64px);
  min-width: min(1354px, calc(100vw - 64px));
}

.help-nav-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  font-weight: 500;
}

.help-nav .brand {
  flex: 0 0 auto;
  width: auto;
  padding-right: 24px;
}

.help-hero {
  position: relative;
  max-width: 1480px;
  min-height: 390px;
  margin: 0 auto 34px;
  padding: 46px 46px 38px;
  overflow: hidden;
  border: 1px solid rgba(111, 231, 255, 0.18);
  border-radius: 8px;
  background:
    linear-gradient(110deg, rgba(8, 20, 42, 0.94), rgba(12, 28, 56, 0.86) 52%, rgba(25, 22, 58, 0.8)),
    radial-gradient(600px 240px at 78% 18%, rgba(111, 231, 255, 0.13), transparent 70%);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.28);
}

.help-hero-image {
  position: absolute;
  right: -120px;
  top: -120px;
  width: 740px;
  height: 560px;
  object-fit: cover;
  opacity: 0.32;
  -webkit-mask-image: linear-gradient(90deg, transparent 0%, #000 24%, #000 82%, transparent 100%);
  mask-image: linear-gradient(90deg, transparent 0%, #000 24%, #000 82%, transparent 100%);
}

.help-kicker {
  position: relative;
  z-index: 1;
  margin: 0 0 10px;
  color: var(--help-cyan);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.help-hero h1 {
  position: relative;
  z-index: 1;
  max-width: 760px;
  margin: 0;
  color: var(--help-text);
  font-size: clamp(46px, 5vw, 74px);
  font-weight: 500;
  line-height: 1.08;
  letter-spacing: 0;
}

.help-lead {
  position: relative;
  z-index: 1;
  max-width: 790px;
  margin: 18px 0 0;
  color: var(--help-soft);
  font-size: 18px;
  line-height: 1.75;
}

.help-search {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 14px;
  width: min(760px, 100%);
  min-height: 58px;
  margin-top: 34px;
  padding: 0 16px 0 20px;
  border: 1px solid rgba(111, 231, 255, 0.24);
  border-radius: 8px;
  background: rgba(4, 12, 26, 0.68);
}

.help-search span {
  color: var(--help-cyan);
  font-size: 14px;
}

.help-search input {
  width: 100%;
  min-width: 0;
  border: 0;
  outline: 0;
  color: var(--help-text);
  font: inherit;
  font-size: 16px;
  background: transparent;
}

.help-search input::placeholder {
  color: rgba(200, 216, 244, 0.58);
}

.help-search kbd {
  min-width: 54px;
  padding: 5px 8px;
  border: 1px solid rgba(143, 167, 212, 0.22);
  border-radius: 6px;
  color: var(--help-muted);
  text-align: center;
  font: inherit;
  font-size: 12px;
  background: rgba(8, 18, 36, 0.8);
}

.help-quick,
.help-layout {
  max-width: 1480px;
  margin: 0 auto;
}

.help-section-head {
  margin-bottom: 16px;
}

.help-section-head h2 {
  margin: 0;
  color: var(--help-text);
  font-size: 30px;
  font-weight: 500;
  line-height: 1.22;
}

.help-quick-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 26px;
}

.help-card,
.help-topic,
.help-panel,
.contact-card,
.help-sidebar {
  border: 1px solid var(--help-border);
  border-radius: 8px;
  background: var(--help-panel);
  box-shadow: 0 20px 58px rgba(0, 0, 0, 0.22);
}

.help-card {
  display: block;
  min-height: 144px;
  padding: 16px;
}

.help-card:hover {
  border-color: rgba(111, 231, 255, 0.48);
  transform: translateY(-1px);
}

.help-card span {
  display: block;
  color: #ffffff;
  font-size: 17px;
  font-weight: 500;
  line-height: 1.35;
}

.help-card p {
  margin: 10px 0 0;
  color: var(--help-muted);
  font-size: 13px;
  line-height: 1.65;
}

.help-layout {
  display: grid;
  grid-template-columns: 236px minmax(0, 1fr);
  gap: 22px;
}

.help-sidebar {
  position: sticky;
  top: 118px;
  align-self: start;
  display: grid;
  gap: 4px;
  padding: 14px;
  background: rgba(8, 18, 36, 0.72);
  backdrop-filter: blur(18px);
}

.help-sidebar a {
  padding: 10px 11px;
  border-radius: 6px;
  color: var(--help-muted);
  font-size: 14px;
  line-height: 1.4;
}

.help-sidebar a:hover {
  color: #ffffff;
  background: rgba(111, 231, 255, 0.08);
}

.help-content {
  min-width: 0;
  display: grid;
  gap: 24px;
}

.help-block {
  scroll-margin-top: 120px;
}

.help-topic {
  padding: 24px 26px;
  background:
    linear-gradient(180deg, rgba(17, 39, 75, 0.86), rgba(8, 18, 36, 0.8)),
    var(--help-panel);
}

.help-topic + .help-topic {
  margin-top: 14px;
}

.help-topic h3,
.help-panel h3 {
  margin: 0;
  color: var(--help-text);
  font-size: 22px;
  font-weight: 500;
  line-height: 1.35;
}

.help-topic p,
.help-panel p,
.contact-block p,
.contact-card p {
  margin: 12px 0 0;
  color: var(--help-soft);
  font-size: 15px;
  line-height: 1.82;
}

.help-topic ul,
.help-panel ol {
  margin: 14px 0 0;
  padding-left: 20px;
  color: var(--help-soft);
  font-size: 15px;
  line-height: 1.82;
}

.help-topic li + li,
.help-panel li + li {
  margin-top: 6px;
}

.help-panel-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.help-panel-grid.two-col {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.help-panel {
  min-height: 238px;
  padding: 22px;
  background: rgba(12, 27, 53, 0.8);
}

.help-info-list {
  display: grid;
  gap: 14px;
}

.contact-block {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 390px;
  gap: 18px;
  padding: 26px;
  border: 1px solid var(--help-border);
  border-radius: 8px;
  background:
    radial-gradient(500px 260px at 78% 18%, rgba(111, 231, 255, 0.1), transparent 70%),
    var(--help-panel-strong);
}

.contact-block h2 {
  margin: 0;
  font-size: 30px;
  font-weight: 500;
}

.contact-card {
  padding: 20px;
  background: rgba(3, 12, 26, 0.48);
}

.contact-card span {
  display: block;
  color: var(--help-muted);
  font-size: 13px;
}

.contact-card a {
  display: block;
  margin-top: 8px;
  color: var(--help-cyan);
  font-size: 22px;
  font-weight: 500;
  overflow-wrap: anywhere;
}

.is-hidden {
  display: none !important;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 32px;
  z-index: 100;
  min-width: 320px;
  padding: 15px 22px;
  border: 1px solid rgba(126, 219, 255, 0.34);
  border-radius: 22px;
  color: #dcebff;
  text-align: center;
  background: rgba(10, 24, 46, 0.88);
  box-shadow: 0 18px 52px rgba(2, 10, 24, 0.52);
  backdrop-filter: blur(18px);
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, 20px);
  transition: opacity 220ms ease, transform 220ms ease;
}

.toast.show {
  opacity: 1;
  transform: translate(-50%, 0);
}

@media (max-width: 1240px) {
  .help-quick-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .help-panel-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 900px) {
  .help-page {
    padding: 126px 12px 42px;
  }

  .help-nav.nav-glass {
    left: 10px;
    right: 10px;
    width: calc(100vw - 24px);
    min-width: 0;
  }

  .help-nav-action {
    display: none;
  }

  .help-layout {
    display: block;
  }

  .help-sidebar {
    position: sticky;
    top: auto;
    z-index: 2;
    display: flex;
    gap: 8px;
    margin-bottom: 12px;
    padding: 8px;
    overflow-x: auto;
    scrollbar-width: none;
  }

  .help-sidebar::-webkit-scrollbar {
    display: none;
  }

  .help-sidebar a {
    flex: 0 0 auto;
    padding: 8px 10px;
    font-size: 13px;
    white-space: nowrap;
  }

  .help-panel-grid,
  .help-panel-grid.two-col,
  .contact-block {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
  }
}

@media (max-width: 680px) {
  .help-nav .brand {
    padding-right: 0;
  }

  .help-nav .nav-links {
    display: flex;
  }

  .help-hero {
    min-height: 0;
    margin-bottom: 20px;
    padding: 20px;
  }

  .help-hero-image {
    right: -210px;
    top: -160px;
    width: 590px;
    height: 430px;
    opacity: 0.24;
  }

  .help-hero h1 {
    font-size: 36px;
    line-height: 1.14;
  }

  .help-lead {
    margin-top: 12px;
    font-size: 15px;
    line-height: 1.58;
  }

  .help-search {
    grid-template-columns: 1fr;
    min-height: 46px;
    margin-top: 18px;
    padding: 0 13px;
  }

  .help-search span,
  .help-search kbd {
    display: none;
  }

  .help-quick-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
    margin-bottom: 18px;
  }

  .help-section-head {
    margin-bottom: 10px;
  }

  .help-section-head h2 {
    font-size: 24px;
  }

  .help-card {
    min-height: 106px;
    padding: 12px;
  }

  .help-card span {
    font-size: 15px;
  }

  .help-card p {
    display: -webkit-box;
    overflow: hidden;
    margin-top: 7px;
    font-size: 12.5px;
    line-height: 1.45;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
  }

  .help-topic,
  .help-panel,
  .contact-block {
    padding: 16px;
  }

  .help-content {
    gap: 18px;
  }

  .help-topic + .help-topic {
    margin-top: 10px;
  }

  .help-topic h3,
  .help-panel h3 {
    font-size: 18px;
  }

  .help-topic p,
  .help-panel p,
  .contact-block p,
  .contact-card p,
  .help-topic ul,
  .help-panel ol {
    font-size: 14px;
    line-height: 1.62;
  }

  .help-panel {
    min-height: 0;
    padding: 14px;
  }

  .help-info-list {
    gap: 10px;
  }

  .contact-block {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 420px) {
  .help-nav.nav-glass {
    width: auto;
  }
}