/* ==========================================================================
   知易 storefront — components & sections
   ========================================================================== */

/* ---------- 顶部导航 ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: color-mix(in srgb, var(--paper) 86%, transparent);
  backdrop-filter: saturate(140%) blur(14px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 20px;
  min-height: 68px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  text-decoration: none;
  flex: 0 0 auto;
}

.brand__mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
  background: var(--jade);
  color: #f7f4ec;
  font-size: 1rem;
  font-weight: 700;
  line-height: 1;
}

html[data-theme='dark'] .brand__mark {
  color: #06120e;
}

.brand__text {
  display: grid;
  line-height: 1.15;
}

.brand__name {
  font-size: 1.02rem;
  font-weight: 680;
  letter-spacing: -0.01em;
}

.brand__tag {
  font-size: 0.7rem;
  color: var(--ink-3);
  letter-spacing: 0.04em;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 26px;
  margin-inline-start: auto;
}

.header-nav a {
  color: var(--ink-2);
  text-decoration: none;
  font-size: 0.925rem;
  font-weight: 520;
  padding-block: 6px;
  border-bottom: 1px solid transparent;
  transition: color var(--dur-1) var(--ease), border-color var(--dur-1) var(--ease);
}

.header-nav a:hover {
  color: var(--ink);
  border-bottom-color: var(--brass);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 0 0 auto;
}

.icon-btn {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--ink-2);
  cursor: pointer;
  transition: border-color var(--dur-1) var(--ease), color var(--dur-1) var(--ease),
    background var(--dur-1) var(--ease);
}

.icon-btn:hover {
  color: var(--ink);
  border-color: var(--line-strong);
  background: var(--surface);
}

.icon-btn__label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
}

.nav-toggle {
  display: none;
}

.mobile-nav {
  display: none;
  border-top: 1px solid var(--line);
  background: var(--surface);
}

.mobile-nav.is-open {
  display: block;
}

.mobile-nav ul {
  list-style: none;
  margin: 0;
  padding: 6px 0;
}

.mobile-nav a {
  display: block;
  padding: 12px var(--gutter);
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
}

.mobile-nav li:last-child a {
  border-bottom: 0;
}

@media (max-width: 900px) {
  .header-nav {
    display: none;
  }

  .header-actions {
    margin-inline-start: auto;
  }

  .nav-toggle {
    display: grid;
  }
}

/* ---------- 按钮 ---------- */

.btn {
  --btn-bg: var(--jade);
  --btn-ink: #f8f5ee;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 18px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  background: var(--btn-bg);
  color: var(--btn-ink);
  font-size: 0.925rem;
  font-weight: 560;
  letter-spacing: 0.005em;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  transition: transform var(--dur-1) var(--ease), background var(--dur-1) var(--ease),
    border-color var(--dur-1) var(--ease), color var(--dur-1) var(--ease), opacity var(--dur-1) var(--ease);
}

html[data-theme='dark'] .btn {
  --btn-ink: #06120e;
}

.btn:hover {
  background: var(--jade-hi);
}

.btn:active {
  transform: translateY(1px);
}

.btn[disabled],
.btn[aria-disabled='true'] {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.btn--ghost {
  --btn-bg: transparent;
  --btn-ink: var(--ink);
  border-color: var(--line-strong);
}

.btn--ghost:hover {
  background: var(--surface);
  border-color: var(--ink-3);
}

.btn--quiet {
  --btn-bg: transparent;
  --btn-ink: var(--ink-2);
  padding-inline: 8px;
}

.btn--quiet:hover {
  background: transparent;
  color: var(--ink);
}

.btn--lg {
  padding: 14px 24px;
  font-size: 1rem;
}

.btn--sm {
  padding: 7px 12px;
  font-size: 0.85rem;
}

.btn--block {
  width: 100%;
}

.btn__spinner {
  width: 13px;
  height: 13px;
  border-radius: 50%;
  border: 2px solid currentColor;
  border-top-color: transparent;
  animation: spin 700ms linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* ---------- 演示横幅 ---------- */

.demo-banner {
  background: var(--brass-soft);
  border-bottom: 1px solid var(--line);
}

.demo-banner .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 16px;
  padding-block: 10px;
  font-size: 0.875rem;
}

.demo-banner__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--brass);
  flex: 0 0 auto;
}

.demo-banner a {
  color: var(--ink);
  font-weight: 560;
}

/* ---------- Hero ---------- */

.hero {
  position: relative;
  padding-block: clamp(44px, 6vw, 88px) clamp(40px, 5vw, 72px);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: radial-gradient(120% 90% at 78% 0%, #000 0%, transparent 68%);
  pointer-events: none;
}

.hero__grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  gap: clamp(32px, 5vw, 72px);
  align-items: start;
}

.hero__copy {
  display: grid;
  gap: 22px;
  max-width: 34ch;
}

.hero__copy p {
  color: var(--ink-2);
  font-size: 1.06rem;
  max-width: 42ch;
}

.hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.trust-line {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 14px;
  margin-top: 6px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  list-style: none;
  color: var(--ink-2);
  font-size: 0.86rem;
}

.trust-line li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.trust-line li + li::before {
  content: '';
  width: 1px;
  height: 12px;
  background: var(--line-strong);
  margin-inline-end: 6px;
}

/* ---------- 结算预览卡片 ---------- */

.checkout-panel {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-1);
  padding: 22px;
  display: grid;
  gap: 16px;
}

.checkout-panel::after {
  content: '';
  position: absolute;
  inset-inline: 22px;
  top: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--jade), var(--brass) 70%, transparent);
  border-radius: 2px 2px 0 0;
}

.panel-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}

.panel-head h2 {
  font-size: 1.02rem;
  letter-spacing: -0.01em;
}

.panel-head p {
  color: var(--ink-3);
  font-size: 0.8rem;
}

.panel-rows {
  display: grid;
  margin: 0;
}

.panel-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 11px 0;
  border-top: 1px solid var(--line);
  font-size: 0.9rem;
}

.panel-row dt {
  color: var(--ink-2);
}

.panel-row dd {
  margin: 0;
  text-align: right;
}

.panel-row--total {
  align-items: center;
  padding-block: 16px;
  border-bottom: 1px solid var(--line);
}

.panel-row--total dd {
  font-family: var(--font-mono);
  font-size: 1.7rem;
  font-weight: 620;
  letter-spacing: -0.02em;
  line-height: 1;
}

.panel-row--total dd .unit {
  font-size: 0.85rem;
  color: var(--ink-2);
  margin-inline-start: 4px;
  letter-spacing: 0.02em;
}

.panel-note {
  color: var(--ink-2);
  font-size: 0.83rem;
}

.panel-foot {
  display: grid;
  gap: 10px;
}

.window-meter {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-2);
}

.window-meter__track {
  position: relative;
  flex: 1;
  height: 3px;
  background: var(--line);
  border-radius: 2px;
  overflow: hidden;
}

.window-meter__fill {
  position: absolute;
  inset-block: 0;
  inset-inline-start: 0;
  width: 100%;
  background: var(--jade);
  transform-origin: left center;
  animation: drain 10s linear infinite;
}

@keyframes drain {
  from {
    transform: scaleX(1);
  }
  to {
    transform: scaleX(0.08);
  }
}

/* ---------- 商品与价格 ---------- */

.product-list {
  border-top: 1px solid var(--line);
}

.product {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  gap: clamp(20px, 4vw, 56px);
  padding-block: clamp(24px, 3vw, 36px);
  border-bottom: 1px solid var(--line);
}

.product__id {
  display: grid;
  align-content: start;
  gap: 12px;
}

.product__name {
  display: flex;
  align-items: center;
  gap: 12px;
}

.product__mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--ink);
  background: var(--surface);
  flex: 0 0 auto;
}

.product__summary {
  color: var(--ink-2);
  font-size: 0.925rem;
  max-width: 40ch;
}

.product__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  color: var(--ink-3);
  font-size: 0.78rem;
}

.product__meta span {
  padding: 3px 8px;
  border: 1px solid var(--line);
  border-radius: 999px;
}

.plan-table {
  display: grid;
}

.plan-row {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
  align-items: center;
  gap: 16px;
  padding: 13px 8px 13px 14px;
  border-top: 1px solid var(--line);
  background: transparent;
  cursor: pointer;
  text-align: left;
  transition: background var(--dur-1) var(--ease), color var(--dur-1) var(--ease);
}

.plan-table > .plan-row:first-child {
  border-top: 0;
}

.plan-row::before {
  content: '';
  position: absolute;
  inset-block: 6px;
  inset-inline-start: 0;
  width: 2px;
  border-radius: 2px;
  background: transparent;
  transition: background var(--dur-1) var(--ease);
}

.plan-row:hover {
  background: var(--surface);
}

.plan-row.is-selected::before {
  background: var(--jade);
}

.plan-row.is-selected .plan-row__name {
  color: var(--jade-hi);
}

.plan-row__name {
  font-weight: 540;
}

.plan-row__price {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 1rem;
  font-weight: 600;
}

.plan-row__price .unit {
  font-size: 0.78rem;
  color: var(--ink-3);
  margin-inline-start: 3px;
}

.plan-row__cta {
  min-width: 68px;
  text-align: right;
  font-size: 0.85rem;
  color: var(--ink-2);
  white-space: nowrap;
}

.plan-row.is-selected .plan-row__cta {
  color: var(--jade-hi);
  font-weight: 560;
}

.products-foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 20px;
  margin-top: 18px;
  color: var(--ink-3);
  font-size: 0.82rem;
}

/* ---------- 流程 ---------- */

.flow {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--line);
}

.flow__step {
  display: grid;
  align-content: start;
  gap: 10px;
  padding: 26px 28px 0 0;
}

.flow__step + .flow__step {
  padding-inline-start: 28px;
  border-inline-start: 1px solid var(--line);
}

.flow__index {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  color: var(--brass);
}

.flow__step p {
  color: var(--ink-2);
  font-size: 0.925rem;
  max-width: 34ch;
}

/* ---------- 安全 / 规格表 ---------- */

.security {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
  gap: clamp(28px, 5vw, 64px);
  align-items: start;
}

.security__copy {
  display: grid;
  gap: 18px;
}

.security__copy p {
  color: var(--ink-2);
  max-width: 46ch;
}

.spec-list {
  margin: 0;
  border-top: 1px solid var(--line);
}

.spec-row {
  display: grid;
  grid-template-columns: minmax(120px, 0.34fr) minmax(0, 1fr);
  gap: 18px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.spec-row dt {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-3);
  padding-top: 3px;
}

.spec-row dd {
  margin: 0;
  font-size: 0.925rem;
}

/* ---------- 订单查询 ---------- */

.lookup {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  gap: clamp(28px, 5vw, 64px);
  align-items: start;
}

.lookup__form {
  display: grid;
  gap: 14px;
  max-width: 420px;
}

.lookup__form p {
  color: var(--ink-2);
  font-size: 0.925rem;
}

.input-row {
  display: flex;
  gap: 8px;
}

.input,
.select {
  width: 100%;
  padding: 11px 13px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--ink);
  font-size: 0.95rem;
  transition: border-color var(--dur-1) var(--ease), box-shadow var(--dur-1) var(--ease);
}

.input::placeholder {
  color: var(--ink-3);
}

.input:focus,
.select:focus {
  outline: none;
  border-color: var(--focus);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--focus) 18%, transparent);
}

.select {
  appearance: none;
  background-image: linear-gradient(45deg, transparent 50%, var(--ink-3) 50%),
    linear-gradient(135deg, var(--ink-3) 50%, transparent 50%);
  background-position: calc(100% - 17px) 50%, calc(100% - 12px) 50%;
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
  padding-inline-end: 34px;
}

.lookup-result {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 20px;
  min-height: 178px;
  display: grid;
  align-content: start;
  gap: 14px;
}

.lookup-result__empty {
  color: var(--ink-3);
  font-size: 0.9rem;
}

.result-rows {
  display: grid;
  margin: 0;
}

.result-row {
  display: grid;
  grid-template-columns: minmax(96px, 0.3fr) minmax(0, 1fr);
  gap: 16px;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
  font-size: 0.9rem;
}

.result-row:first-child {
  border-top: 1px solid var(--line);
}

.result-row dt {
  color: var(--ink-2);
}

.result-row dd {
  margin: 0;
  font-family: var(--font-mono);
  word-break: break-word;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 3px 10px;
  border-radius: 999px;
  border: 1px solid currentColor;
  font-family: var(--font-sans);
  font-size: 0.8rem;
  line-height: 1.5;
}

.status-pill::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}

.status-pill--ok {
  color: var(--ok);
}

.status-pill--warn {
  color: var(--warn);
}

.status-pill--danger {
  color: var(--danger);
}

.status-pill--info {
  color: var(--ink-2);
}

/* ---------- FAQ ---------- */

.faq {
  border-top: 1px solid var(--line);
}

.faq details {
  border-bottom: 1px solid var(--line);
}

.faq details[open] {
  background: color-mix(in srgb, var(--surface) 70%, transparent);
}

.faq summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 20px 4px;
  cursor: pointer;
  font-weight: 560;
  font-size: 1rem;
  list-style: none;
}

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

.faq summary::after {
  content: '';
  width: 12px;
  height: 12px;
  flex: 0 0 auto;
  background: currentColor;
  color: var(--ink-3);
  mask-image: linear-gradient(#000, #000), linear-gradient(#000, #000);
  mask-size: 12px 1.5px, 1.5px 12px;
  mask-position: center, center;
  mask-repeat: no-repeat;
  transition: transform var(--dur-2) var(--ease), color var(--dur-1) var(--ease);
}

.faq details[open] summary::after {
  transform: rotate(90deg);
  color: var(--jade-hi);
}

.faq__answer {
  padding: 0 4px 22px;
  color: var(--ink-2);
  max-width: 68ch;
  font-size: 0.94rem;
}

/* ---------- 页脚 ---------- */

.site-footer {
  background: var(--jade);
  color: #e8efe9;
  padding-block: clamp(40px, 5vw, 68px) 26px;
}

html[data-theme='dark'] .site-footer {
  background: var(--band);
  color: var(--ink);
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) repeat(3, minmax(0, 1fr));
  gap: 32px;
  padding-bottom: 34px;
}

.footer-brand {
  display: grid;
  gap: 14px;
  align-content: start;
  justify-items: start;
}

.footer-brand .brand__mark {
  background: rgba(255, 255, 255, 0.14);
  color: #f4efe4;
}

html[data-theme='dark'] .footer-brand .brand__mark {
  background: var(--jade);
  color: var(--jade-ink);
}

.footer-brand .brand__name {
  color: inherit;
}

.footer-brand .brand__tag,
.footer-note {
  color: rgba(232, 239, 233, 0.68);
}

html[data-theme='dark'] .footer-brand .brand__tag,
html[data-theme='dark'] .footer-note {
  color: var(--ink-2);
}

.footer-note {
  font-size: 0.86rem;
  max-width: 34ch;
}

.footer-col h3 {
  font-size: 0.76rem;
  font-family: var(--font-mono);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(232, 239, 233, 0.6);
  margin-bottom: 12px;
  font-weight: 500;
}

html[data-theme='dark'] .footer-col h3 {
  color: var(--ink-3);
}

.footer-col ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 9px;
}

.footer-col a {
  color: inherit;
  text-decoration: none;
  font-size: 0.9rem;
  opacity: 0.85;
}

.footer-col a:hover {
  opacity: 1;
  text-decoration: underline;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 24px;
  padding-top: 22px;
  border-top: 1px solid rgba(255, 255, 255, 0.16);
  font-size: 0.8rem;
  color: rgba(232, 239, 233, 0.66);
}

html[data-theme='dark'] .footer-bottom {
  border-top-color: var(--line);
  color: var(--ink-3);
}

/* ---------- 结算弹层 ---------- */

.checkout {
  position: fixed;
  inset: 0;
  z-index: 60;
  display: grid;
  align-items: center;
  justify-items: center;
  padding: 20px;
  background: color-mix(in srgb, #0a1512 62%, transparent);
  backdrop-filter: blur(6px);
  animation: fade-in var(--dur-2) var(--ease);
}

.checkout[hidden] {
  display: none;
}

@keyframes fade-in {
  from {
    opacity: 0;
  }
}

.checkout__sheet {
  width: 100%;
  max-width: 540px;
  max-height: min(92vh, 880px);
  overflow: auto;
  background: var(--surface);
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-2);
  animation: sheet-in var(--dur-2) var(--ease);
}

@keyframes sheet-in {
  from {
    opacity: 0;
    transform: translateY(14px) scale(0.99);
  }
}

.checkout__head {
  position: sticky;
  top: 0;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 22px;
  background: var(--surface);
  border-bottom: 1px solid var(--line);
}

.checkout__head h2 {
  font-size: 1.05rem;
}

.steps {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 22px;
  border-bottom: 1px solid var(--line);
  background: var(--surface-2);
  font-size: 0.8rem;
}

.steps__item {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--ink-3);
  white-space: nowrap;
}

.steps__item::before {
  content: '';
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 1px solid currentColor;
}

.steps__item.is-active {
  color: var(--jade-hi);
  font-weight: 560;
}

.steps__item.is-done::before {
  background: currentColor;
  border-color: currentColor;
}

.steps__item.is-active::before {
  background: currentColor;
  border-color: currentColor;
  box-shadow: inset 0 0 0 3px var(--surface-2);
}

.steps__sep {
  flex: 1;
  min-width: 12px;
  height: 1px;
  background: var(--line-strong);
}

.checkout__body {
  padding: 22px;
  display: grid;
  gap: 20px;
}

.checkout__body > form,
.checkout__stack {
  display: grid;
  gap: 20px;
}

.field {
  display: grid;
  gap: 7px;
}

.field > label,
.field__label {
  font-size: 0.82rem;
  color: var(--ink-2);
  font-weight: 540;
}

.field__hint {
  font-size: 0.78rem;
  color: var(--ink-3);
}

.field-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.choice-group {
  display: grid;
  gap: 8px;
}

.choice {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: transparent;
  cursor: pointer;
  font-size: 0.9rem;
  transition: border-color var(--dur-1) var(--ease), background var(--dur-1) var(--ease);
}

.choice:hover {
  border-color: var(--line-strong);
  background: var(--surface-2);
}

.choice:has(input:checked) {
  border-color: var(--jade);
  background: color-mix(in srgb, var(--jade) 7%, transparent);
}

.choice input {
  margin: 3px 0 0;
  accent-color: var(--jade);
  flex: 0 0 auto;
}

.choice__text {
  display: grid;
  gap: 2px;
}

.choice__text small {
  color: var(--ink-3);
  font-size: 0.78rem;
}

.amount-block {
  display: grid;
  gap: 6px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-2);
  text-align: center;
}

.amount-block .field__label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.amount-block__value {
  font-family: var(--font-mono);
  font-size: 2.1rem;
  font-weight: 640;
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.amount-block__value .unit {
  font-size: 0.95rem;
  color: var(--ink-2);
  margin-inline-start: 5px;
}

.amount-block small {
  color: var(--ink-2);
  font-size: 0.8rem;
}

.copyfield {
  display: flex;
  align-items: stretch;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  background: var(--surface);
  overflow: hidden;
}

.copyfield code {
  flex: 1;
  padding: 11px 13px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  word-break: break-all;
  line-height: 1.5;
  align-self: center;
}

.copyfield button {
  flex: 0 0 auto;
  padding-inline: 14px;
  border: 0;
  border-inline-start: 1px solid var(--line);
  background: var(--surface-2);
  color: var(--ink-2);
  font-size: 0.82rem;
  cursor: pointer;
  transition: background var(--dur-1) var(--ease), color var(--dur-1) var(--ease);
}

.copyfield button:hover {
  background: var(--jade);
  color: #f7f4ec;
}

.pay-grid {
  display: grid;
  grid-template-columns: 138px minmax(0, 1fr);
  gap: 18px;
  align-items: start;
}

.qr-frame {
  display: grid;
  place-items: center;
  aspect-ratio: 1;
  padding: 10px;
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
}

.qr-frame canvas,
.qr-frame svg {
  width: 100%;
  height: auto;
}

.pay-meta {
  display: grid;
  gap: 12px;
  min-width: 0;
}

.timer {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface-2);
}

.timer__value {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.01em;
  min-width: 3.4ch;
}

.timer__track {
  position: relative;
  flex: 1;
  height: 4px;
  border-radius: 2px;
  background: var(--line);
  overflow: hidden;
}

.timer__fill {
  position: absolute;
  inset: 0 auto 0 0;
  width: 100%;
  background: var(--jade);
  transition: width 1s linear, background var(--dur-2) var(--ease);
}

.timer.is-warn .timer__fill {
  background: var(--warn);
}

.timer.is-danger .timer__fill {
  background: var(--danger);
}

.timer.is-danger .timer__value {
  color: var(--danger);
}

.notice {
  display: flex;
  gap: 10px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-left: 2px solid var(--jade);
  border-radius: var(--radius-sm);
  background: var(--surface-2);
  font-size: 0.85rem;
  color: var(--ink-2);
  line-height: 1.55;
}

.notice--warn {
  border-left-color: var(--warn);
}

.notice--danger {
  border-left-color: var(--danger);
}

.notice--ok {
  border-left-color: var(--ok);
}

.notice strong {
  color: var(--ink);
  font-weight: 600;
}

.checkout__foot {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.checkout__foot .btn {
  flex: 1 1 auto;
}

.done-block {
  display: grid;
  gap: 14px;
  justify-items: center;
  text-align: center;
  padding-block: 8px 4px;
}

.done-mark {
  display: grid;
  place-items: center;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: color-mix(in srgb, var(--ok) 14%, transparent);
  color: var(--ok);
}

.done-block h3 {
  font-size: 1.15rem;
}

.done-block p {
  color: var(--ink-2);
  font-size: 0.92rem;
  max-width: 34ch;
}

.done-order {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 600;
  padding: 8px 16px;
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius-sm);
}

.raw-toggle {
  font-size: 0.8rem;
}

.raw-block {
  margin: 0;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface-2);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  line-height: 1.55;
  max-height: 220px;
  overflow: auto;
  white-space: pre-wrap;
  word-break: break-word;
}

/* ---------- Toast ---------- */

.toast-stack {
  position: fixed;
  inset-inline: 0;
  bottom: 24px;
  z-index: 80;
  display: grid;
  justify-items: center;
  gap: 8px;
  pointer-events: none;
}

.toast {
  padding: 9px 16px;
  border-radius: 999px;
  background: var(--ink);
  color: var(--paper);
  font-size: 0.86rem;
  box-shadow: var(--shadow-1);
  animation: toast-in var(--dur-2) var(--ease);
}

@keyframes toast-in {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
}

/* ---------- 响应式 ---------- */

@media (max-width: 960px) {
  .hero__grid,
  .security,
  .lookup {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero__copy {
    max-width: none;
  }

  .product {
    grid-template-columns: minmax(0, 1fr);
    gap: 18px;
  }

  .flow {
    grid-template-columns: minmax(0, 1fr);
  }

  .flow__step {
    padding: 22px 0;
    border-bottom: 1px solid var(--line);
  }

  .flow__step + .flow__step {
    padding-inline-start: 0;
    border-inline-start: 0;
  }

  .footer-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 28px;
  }
}

@media (max-width: 640px) {
  :root {
    --gutter: 18px;
  }

  /* 窄屏：品牌只留标记与名称，页头按钮收紧，避免挤爆一行 */
  .brand__tag {
    display: none;
  }

  .header-inner {
    gap: 12px;
  }

  .header-actions .btn {
    padding: 8px 13px;
    font-size: 0.875rem;
  }

  .hero {
    padding-block: 28px 34px;
  }

  .checkout-panel {
    padding: 18px;
  }

  .plan-row {
    grid-template-columns: minmax(0, 1fr) auto;
    row-gap: 4px;
  }

  .plan-row__name {
    grid-column: 1 / -1;
  }

  .spec-row,
  .result-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
  }

  .pay-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .qr-frame {
    max-width: 190px;
    margin-inline: auto;
  }

  .checkout {
    padding: 0;
    align-items: end;
  }

  .checkout__sheet {
    max-width: none;
    max-height: 94vh;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    border-bottom: 0;
  }

  .checkout__body,
  .checkout__head {
    padding-inline: 18px;
  }

  .steps {
    padding-inline: 18px;
  }

  .field-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .footer-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 360px) {
  .header-actions .btn {
    display: none;
  }
}

/* ---------- X 账号可充值校验 ---------- */

.check-status {
  display: grid;
  gap: 7px;
  margin-top: 4px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-left: 2px solid var(--ink-3);
  border-radius: var(--radius-sm);
  background: var(--surface-2);
  color: var(--ink-2);
  font-size: 0.84rem;
  line-height: 1.55;
}

.check-status[hidden] {
  display: none;
}

.check-status--ok {
  border-left-color: var(--ok);
}

.check-status--warn {
  border-left-color: var(--warn);
}

.check-status--danger {
  border-left-color: var(--danger);
}

.check-status__title {
  color: var(--ink);
  font-weight: 600;
}

.check-status--ok .check-status__title {
  color: var(--ok);
}

.check-status--warn .check-status__title {
  color: var(--warn);
}

.check-status--danger .check-status__title {
  color: var(--danger);
}

.check-status__row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.check-status__spinner {
  flex: 0 0 auto;
  width: 12px;
  height: 12px;
  border: 2px solid var(--line-strong);
  border-top-color: var(--ink-2);
  border-radius: 50%;
  animation: spin 700ms linear infinite;
}

.check-status__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.check-status__ack {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 0.82rem;
}

.check-status__ack input {
  margin: 3px 0 0;
  accent-color: var(--jade);
}

/* ---------- 视图切换（PC / 手机两版互跳，由 device-boot.js 注入） ---------- */

.view-switch {
  font-size: inherit;
  white-space: nowrap;
}

.footer-bottom .view-switch {
  color: rgba(232, 239, 233, 0.92);
  text-decoration: underline;
  text-decoration-color: rgba(232, 239, 233, 0.4);
}

.footer-bottom .view-switch:hover {
  text-decoration-color: currentColor;
}

html[data-theme='dark'] .footer-bottom .view-switch {
  color: var(--jade-hi);
  text-decoration-color: color-mix(in srgb, var(--jade-hi) 40%, transparent);
}