.hero {
  position: relative;
  overflow-x: clip;
  padding-top: 74px;
  padding-bottom: 60px;
  text-align: center;
}
.hero::before {
  position: absolute;
  z-index: 0;
  top: 90px;
  left: 50%;
  width: min(720px, 90vw);
  height: 220px;
  border: 1px solid var(--color-border);
  border-radius: 50%;
  content: "";
  opacity: .7;
  transform: translateX(-50%) rotate(-4deg);
}
.hero > .wrap {
  position: relative;
  z-index: 1;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  max-width: 100%;
  margin-bottom: 24px;
  padding: 6px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: var(--color-panel);
  color: var(--color-muted);
  font: 13px/1.3 var(--font-body);
  letter-spacing: .08em;
}
.hero-badge i {
  width: 7px;
  height: 7px;
  flex: 0 0 7px;
  border-radius: 50%;
  background: var(--color-accent);
}
.hero h1 {
  max-width: 900px;
  margin: 0 auto 22px;
}
.hero h1 .hl {
  color: var(--color-accent);
}
.hero-sub {
  max-width: 650px;
  margin: 0 auto 30px;
  color: var(--color-muted);
  font-size: 19px;
}
.hero-sub strong {
  color: var(--color-text);
}
.hero-cta {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-bottom: 24px;
}
.hero-cta .btn {
  min-width: 150px;
  font-size: 17px;
}
.trust-row,
.chips-line {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}
.trust-row {
  margin-bottom: 36px;
}
.trust-chip,
.badge,
.tag {
  display: inline-flex;
  max-width: 100%;
  align-items: center;
  gap: 7px;
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  padding: 5px 13px;
  background: var(--color-bg);
  color: var(--color-muted);
  font-size: 13px;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.trust-chip::before {
  width: 6px;
  height: 6px;
  flex: 0 0 6px;
  border-radius: 50%;
  background: var(--color-success);
  content: "";
}
.hero-rows {
  display: grid;
  gap: 14px;
}
.chips-cap {
  min-width: 126px;
  padding-right: 16px;
  border-right: 1px solid var(--color-border);
  color: var(--color-muted);
  font: 11px/1.3 var(--font-mono);
  letter-spacing: .12em;
  text-align: right;
  text-transform: uppercase;
}
.plat,
.flagc {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--color-muted);
  font-size: 14px;
}
.plat svg {
  width: 19px;
  height: 19px;
}
.flagc svg {
  width: 30px;
  height: 20px;
  flex: 0 0 30px;
  /* 白底旗(日本/韩国/新加坡)在浅色卡片上会整面隐身只剩红点,描一圈边把旗面框出来。
     必须用 border:svg 是替换元素,inset box-shadow 会被旗面内容盖住画不出来 */
  border: 1px solid var(--color-border);
  border-radius: 4px;
}
.flag-frame {
  fill: none;
  stroke: var(--color-border);
  stroke-width: 1;
}
.fw {
  fill: var(--flag-white);
}
.fr {
  fill: var(--flag-red);
}
.fb {
  fill: var(--flag-blue);
}
.fn {
  fill: var(--flag-navy);
}
.stats-band {
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-panel);
}
.band-track {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-width: 0;
  padding-top: 25px;
  padding-bottom: 25px;
}
.band-track::before {
  position: absolute;
  top: 50%;
  right: var(--gutter);
  left: var(--gutter);
  height: 1px;
  background: var(--color-border);
  content: "";
}
.band-item {
  position: relative;
  z-index: 1;
  min-width: 0;
  padding: 0 30px;
  background: var(--color-panel);
  text-align: center;
}
.band-item:first-child {
  padding-left: 0;
}
.band-item:last-child {
  padding-right: 0;
}
.band-num {
  display: block;
  color: var(--color-accent);
  font: 700 27px/1.2 var(--font-mono);
}
.band-lab {
  display: block;
  margin-top: 3px;
  color: var(--color-muted);
  font-size: 13px;
}
.band-node {
  position: relative;
  z-index: 1;
  display: grid;
  width: 22px;
  height: 22px;
  flex: 0 0 22px;
  place-items: center;
  border: 1px solid var(--color-border);
  border-radius: 50%;
  background: var(--color-panel);
  color: var(--color-accent);
}
.band-node svg {
  width: 11px;
  height: 11px;
}
.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}
.feature-card {
  display: flex;
  min-width: 0;
  flex-direction: column;
  min-height: 430px;
  padding: 30px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg);
}
.feature-card:nth-child(2n) {
  background: var(--color-panel);
}
.feature-mark {
  width: 8px;
  height: 8px;
  margin-bottom: 25px;
  background: var(--color-accent);
}
.feature-card h3 {
  max-width: 500px;
  margin-bottom: 15px;
}
.feature-card p {
  max-width: 600px;
  color: var(--color-muted);
}
.feature-demo {
  display: grid;
  gap: 8px;
  margin-top: auto;
  padding: 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-panel-2);
  font: 12px/1.5 var(--font-mono);
}
.demo-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  min-width: 0;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 7px;
}
.demo-row:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}
.demo-state {
  color: var(--color-success);
}
.tabs {
  display: inline-flex;
  max-width: 100%;
  overflow-x: auto;
  gap: 3px;
  padding: 4px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-panel-2);
}
.tabs [role="tab"] {
  min-height: 40px;
  border: 0;
  border-radius: var(--radius-sm);
  padding: 8px 18px;
  background: transparent;
  color: var(--color-muted);
  white-space: nowrap;
}
.tabs [role="tab"][aria-selected="true"] {
  background: var(--color-bg);
  color: var(--color-text);
  box-shadow: 0 1px 3px rgba(28, 27, 26, .08);
}
.plan-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}
.plan-card {
  position: relative;
  display: flex;
  min-width: 0;
  flex-direction: column;
  padding: 26px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg);
}
.plan-card.is-featured,
.plan-card[data-current="true"] {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 1px var(--color-accent);
}
.plan-ribbon {
  position: absolute;
  top: -12px;
  right: 18px;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  background: var(--color-accent);
  color: var(--flag-white);
  font-size: 12px;
  font-weight: 650;
}
.plan-name {
  margin-bottom: 20px;
  font-size: 20px;
}
.plan-price {
  margin-bottom: 4px;
  color: var(--color-accent);
  font: 700 31px/1.2 var(--font-mono);
}
.plan-price small {
  color: var(--color-muted);
  font: 400 13px var(--font-body);
}
.plan-meta {
  min-height: 48px;
  color: var(--color-muted);
}
.plan-card .btn {
  width: 100%;
  margin-top: auto;
}
.table-scroll {
  width: 100%;
  max-width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.data-table {
  width: 100%;
  min-width: 650px;
  border-collapse: collapse;
  background: var(--color-bg);
}
.data-table th,
.data-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--color-border);
  text-align: left;
  vertical-align: top;
}
.data-table th {
  background: var(--color-panel);
  color: var(--color-text);
  font-weight: 650;
  white-space: nowrap;
}
.data-table td {
  color: var(--color-muted);
}
.prose > .data-table {
  display: block;
  max-width: 100%;
  min-width: 0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.route-group {
  margin-bottom: 28px;
}
.route-group h3 {
  margin-bottom: 12px;
  font-size: 22px;
}
.platform-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 12px;
}
.platform-card {
  min-width: 0;
  padding: 20px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg);
  text-align: center;
}
.platform-card svg {
  width: 28px;
  height: 28px;
  margin-bottom: 10px;
  color: var(--color-accent);
}
.platform-card h3 {
  margin-bottom: 14px;
  font-size: 16px;
}
.article-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}
.article-card {
  min-width: 0;
  padding: 24px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg);
}
.article-card h3 {
  margin: 15px 0 10px;
  font-size: 21px;
}
.article-card p {
  color: var(--color-muted);
  font-size: 14px;
}
.article-meta {
  color: var(--color-muted);
  font: 12px var(--font-mono);
}
.prose {
  max-width: 760px;
  margin-inline: auto;
}
.prose h2 {
  margin-top: 52px;
  margin-bottom: 18px;
  font-size: 34px;
}
.prose h3 {
  margin-top: 30px;
  margin-bottom: 12px;
  font-size: 23px;
}
.prose ul,
.prose ol {
  padding-left: 24px;
}
.prose li {
  margin-bottom: 8px;
}
.toc-tabs {
  position: sticky;
  z-index: 20;
  top: 0;
  display: flex;
  max-width: 100%;
  gap: 5px;
  overflow-x: auto;
  padding: 9px var(--gutter);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg);
  white-space: nowrap;
}
.toc-tabs a {
  padding: 7px 12px;
  border-radius: var(--radius-pill);
  color: var(--color-muted);
  font-size: 13px;
}
.toc-tabs a:hover,
.toc-tabs a.is-current {
  background: var(--color-accent);
  color: var(--flag-white);
}
body:has(.toc-tabs) section[id] {
  scroll-margin-top: 62px;
}
.help-hero {
  padding: 72px 0 58px;
}
.help-hero > .wrap {
  position: relative;
  z-index: 1;
}
.help-lead {
  max-width: 760px;
  margin: 0 0 24px;
  color: var(--color-muted);
  font-size: 18px;
}
.help-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  color: var(--color-muted);
  font-size: 14px;
}
.help-category {
  margin-top: 64px;
}
.category-head {
  max-width: 760px;
  margin-bottom: 24px;
}
.category-head .kicker {
  position: static;
  margin-bottom: 12px;
}
.category-head h2 {
  margin-bottom: 14px;
}
.category-head > p:last-child {
  color: var(--color-muted);
}
@media (max-width: 640px) {
  .help-hero {
    padding: 48px 0 40px;
  }
  .help-lead {
    font-size: 16px;
  }
  .help-category {
    margin-top: 44px;
  }
}
.faq-list {
  display: grid;
  gap: 10px;
}
.faq-list details {
  border-bottom: 1px solid var(--color-border);
}
.faq-list summary {
  position: relative;
  padding: 18px 36px 18px 0;
  cursor: pointer;
  font-weight: 650;
  list-style: none;
}
.faq-list summary::-webkit-details-marker {
  display: none;
}
.faq-list summary::after {
  position: absolute;
  top: 18px;
  right: 5px;
  color: var(--color-accent);
  content: "+";
  font: 22px/1 var(--font-mono);
}
.faq-list details[open] summary::after {
  content: "−";
}
.faq-answer {
  padding: 0 20px 18px 0;
  color: var(--color-muted);
}
.promo-block {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-top: 56px;
  padding: 30px;
  border-radius: var(--radius-md);
  background: var(--color-panel-2);
}
.promo-block p {
  margin-bottom: 0;
  color: var(--color-muted);
}
.badge-accent {
  border-color: var(--color-accent);
  color: var(--color-accent);
}
@media (max-width: 820px) {
  .feature-grid,
  .plan-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .platform-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .article-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}
@media (max-width: 640px) {
  .help-hero .eyebrow,
  .help-content .kicker {
    display: none;
  }
  .help-hero .help-lead,
  .help-hero .help-facts {
    position: relative;
    z-index: 1;
  }
  .help-hero::before,
  .help-hero::after,
  .help-content::before,
  .help-content::after {
    display: none;
  }
  .help-content .category-head {
    position: static;
    height: auto;
    overflow: visible;
  }
  .help-content .help-category,
  .help-content .faq-list,
  .help-content .faq-list details,
  .help-content .faq-answer {
    position: static;
    height: auto;
    overflow: visible;
  }
  .help-content .category-head > p,
  .help-content .faq-answer p {
    position: static;
    inset: auto;
    width: auto;
    max-width: 100%;
    height: auto;
    margin-bottom: 17px;
    line-height: 1.75;
    transform: none;
  }
  .help-next {
    display: flex;
    align-items: flex-start;
    flex-direction: column;
    gap: 20px;
  }
  .help-next .btn {
    position: static;
  }
  .category-head .kicker {
    display: none;
  }
  .hero {
    padding-top: 44px;
    padding-bottom: 38px;
  }
  .hero::before {
    top: 100px;
    width: 620px;
    height: 170px;
  }
  .hero-sub {
    font-size: 17px;
  }
  .hero-cta {
    align-items: stretch;
    flex-direction: column;
    gap: 10px;
    max-width: 310px;
    margin-inline: auto;
  }
  .hero-cta .btn {
    width: 100%;
  }
  .trust-row {
    align-items: stretch;
    flex-direction: column;
    max-width: 300px;
    margin-inline: auto;
  }
  .trust-chip {
    justify-content: center;
    white-space: normal;
  }
  /* 手机上不许一枚一行竖着淌(12 行又高又稀):保持横排换行,标签独占一行居中,
     与 hero 其余内容(按钮/信任条)的居中节奏一致 */
  .chips-line {
    gap: 10px 16px;
  }
  .chips-cap {
    flex-basis: 100%;
    min-width: 0;
    padding: 0;
    border-right: 0;
    text-align: center;
  }
  .band-track {
    align-items: stretch;
    flex-direction: column;
    gap: 14px;
  }
  .band-track::before,
  .band-node {
    display: none;
  }
  .band-item,
  .band-item:first-child,
  .band-item:last-child {
    padding: 0;
  }
  .feature-grid,
  .plan-grid,
  .article-grid {
    grid-template-columns: minmax(0, 1fr);
  }
  .feature-card {
    min-height: 0;
  }
  .platform-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .promo-block {
    align-items: stretch;
    flex-direction: column;
  }
}