/* Landing page (/) only. */
.land-shell { max-width: 608px; }
.land-shell > .card + .card, .land-shell > section + section, .land-shell main > section + section { margin-top: 16px; }
@media (min-width: 768px) { .site-shell.land-shell { padding-top: 48px; } }

/* hero: the answer, the promise, three steps */
.land-hero { margin-bottom: 24px; }
.land-promise { display: flex; align-items: center; gap: 8px; margin-top: 12px; color: var(--success-text); font-size: var(--fs-body); line-height: var(--lh-body); font-weight: 500; }
.land-promise .icon { width: 20px; height: 20px; vertical-align: 0; }

/* how it works: 1 选服务 / 2 登录并充值 / 3 拿号收码 */
.how { display: grid; grid-template-columns: repeat(3, auto); justify-content: start; gap: 8px 0; margin: 24px 0 0; padding: 0; list-style: none; }
.how li { display: flex; align-items: center; gap: 10px; font-size: var(--fs-body); font-weight: 500; color: var(--text); white-space: nowrap; }
.how li + li::before { content: ""; width: 32px; height: 1px; margin: 0 12px; background: var(--border-strong); }
.how-n { display: inline-flex; align-items: center; justify-content: center; width: 28px; height: 28px; border-radius: 50%; border: 1.5px solid var(--cobalt); color: var(--cobalt); font-size: var(--fs-sm); font-weight: 600; font-variant-numeric: tabular-nums; flex: none; }
@media (max-width: 520px) {
  .how { grid-template-columns: 1fr; gap: 0; margin-top: 20px; }
  .how li { min-height: 40px; }
  .how li + li::before { display: none; }
}

/* service picker: a list of buttons */
.svc-cards { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
@media (max-width: 520px) { .svc-cards { grid-template-columns: 1fr; } }
.svc-cards > li { min-width: 0; }
.svc-card { display: flex; flex-direction: column; align-items: stretch; gap: 4px; width: 100%; min-height: 136px; text-align: left;
  padding: 20px; border: 1px solid var(--border-input); border-radius: var(--radius-card); background: var(--card);
  font: inherit; color: var(--text); cursor: pointer;
  transition: border-color var(--dur-fast) var(--ease-out), background-color var(--dur-fast) var(--ease-out), box-shadow var(--dur-fast) var(--ease-out), transform var(--dur-fast) var(--ease-out); }
.svc-card:hover { border-color: var(--cobalt); box-shadow: inset 0 0 0 1px var(--cobalt); }
.svc-card:hover .svc-chev { color: var(--cobalt); transform: translateX(2px); }
.svc-card:active:not(:disabled) { background: var(--cobalt-tint); border-color: var(--cobalt); box-shadow: inset 0 0 0 1px var(--cobalt); transform: translateY(1px); }
.svc-card:focus-visible { outline: var(--focus); outline-offset: var(--focus-offset); }
.svc-card:disabled { cursor: not-allowed; background: var(--neutral-bg); color: var(--text-placeholder); border-color: var(--border); box-shadow: none; }
.svc-card:disabled .svc-price, .svc-card:disabled .svc-sub, .svc-card:disabled .svc-price small { color: var(--text-placeholder); }
.svc-head { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.svc-card .svc-title { font-weight: 600; font-size: var(--fs-md); line-height: var(--lh-md); }
.svc-chev { width: 20px; height: 20px; color: var(--text-3); transition: color var(--dur-fast) var(--ease-out), transform var(--dur-fast) var(--ease-out); }
.svc-card .svc-sub { color: var(--text-2); font-size: var(--fs-sm); line-height: var(--lh-sm); }
.svc-card .svc-price { margin-top: auto; padding-top: 12px; font-size: var(--fs-2xl); line-height: var(--lh-2xl); font-weight: 650; letter-spacing: -0.01em; color: var(--text); font-variant-numeric: tabular-nums; }
.svc-card .svc-price small { font-size: var(--fs-xs); font-weight: 500; letter-spacing: 0; color: var(--text-2); margin-left: 4px; }
.svc-skel { min-height: 136px; border-radius: var(--radius-card); }
/* phones: one row per tile, name left and price right, the sub line below */
@media (max-width: 520px) {
  .svc-card { display: grid; grid-template-columns: 1fr auto; grid-template-areas: "head price" "sub price"; align-items: center; min-height: 0; padding: 16px 20px; gap: 2px 12px; }
  .svc-head { grid-area: head; justify-content: flex-start; }
  .svc-card .svc-sub { grid-area: sub; }
  .svc-card .svc-price { grid-area: price; margin: 0; padding: 0; font-size: var(--fs-xl); line-height: var(--lh-xl); white-space: nowrap; }
  .svc-chev { display: none; }
  .svc-skel { min-height: 76px; }
}

/* the chosen service, once picked: the hero shrinks to this bar */
.picked { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 12px 12px 12px 20px; }
.picked .picked-name { font-weight: 600; font-size: var(--fs-md); }
.picked .picked-price { color: var(--text-2); margin-left: 8px; font-variant-numeric: tabular-nums; }

/* funnel cards carry the page's main task: headline size */
.land-shell .card form > h2, .land-shell .card-head h2 { font-size: var(--fs-lg); line-height: var(--lh-lg); font-weight: 650; letter-spacing: -0.01em; }
.land-shell .card-head h2 .icon { display: none; }

/* recharge tiers: paid on the left, credited on the right */
.tier-list { list-style: none; margin: 12px 0 0; padding: 0; display: grid; gap: 8px; }
.tier-list a { display: flex; align-items: center; gap: 12px; min-height: 48px; padding: 10px 14px 10px 16px;
  border: 1px solid var(--border-input); border-radius: var(--radius-btn); color: var(--text); font-size: var(--fs-sm);
  transition: border-color var(--dur-fast) var(--ease-out), background-color var(--dur-fast) var(--ease-out); }
.tier-list a:hover, .tier-list a:not(.btn):hover { border-color: var(--cobalt); color: var(--text); text-decoration: none; }
.tier-list a:active { background: var(--cobalt-tint); }
.tier-list .tier-paid { color: var(--text-2); font-variant-numeric: tabular-nums; }
.tier-list .tier-credit { margin-left: auto; font-size: var(--fs-body); font-weight: 600; font-variant-numeric: tabular-nums; }
.tier-list .icon { color: var(--text-3); }
#step-recharge .card-head { margin-bottom: 8px; }
.recharge-facts { margin: 0; font-variant-numeric: tabular-nums; }
.recharge-promise { margin: 8px 0 16px; }
.recharge-secondary { margin-top: 24px; padding-top: 20px; border-top: 1px solid var(--border); }

.order-hint { margin-bottom: 12px; color: var(--text); font-size: var(--fs-body); line-height: var(--lh-body); font-weight: 600; }
.order-hint .hold { color: var(--text-2); font-weight: 400; }
.o-refund { margin-bottom: 16px; }
.promo-card { padding: 8px 24px; }
.promo-card details.promo-box { margin-top: 0; }
.promo-card details.promo-box summary { padding: 10px 0; }
.promo-card details[open] { padding-bottom: 12px; }