/* DEXTERbot 前台样式。手写 CSS，设计令牌集中在 :root，深色模式只替换令牌。
   网格 8px；圆角 12 / 16px；只用一个品牌色（墨蓝），其余为中性灰。 */

:root {
  --bg: #F8F9FB;
  --surface: #FFFFFF;
  --surface-2: #F2F4F7;
  --border: #E3E7ED;
  --border-strong: #CBD2DC;
  --input-border: #7D8796;
  --text: #121821;
  --text-2: #475263;
  --text-3: #5F6B7A;
  --brand: #1E3A5F;
  --brand-hover: #18304F;
  --brand-press: #132840;
  --brand-weak: #EBF0F7;
  --on-brand: #FFFFFF;
  --ok: #1D6B45;
  --ok-weak: #EAF5EF;
  --warn: #8A5A00;
  --warn-weak: #FBF4E4;
  --danger: #B3261E;
  --danger-weak: #FCEEEE;
  --overlay: rgba(10, 14, 20, .78);
  --ring: 0 0 0 3px rgba(30, 58, 95, .25);

  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 16px;
  --s1: 4px; --s2: 8px; --s3: 12px; --s4: 16px; --s5: 24px; --s6: 32px; --s7: 48px; --s8: 64px; --s9: 96px;

  --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei",
    "Hiragino Sans GB", "Noto Sans CJK SC", "Segoe UI", system-ui, sans-serif;
  --font-mono: ui-monospace, "SF Mono", "Cascadia Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --ease: cubic-bezier(.2, .7, .2, 1);
  --header-h: 64px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0E1116;
    --surface: #151A21;
    --surface-2: #1B212A;
    --border: #262E39;
    --border-strong: #354050;
    --input-border: #6B7685;
    --text: #E7EBF0;
    --text-2: #B3BCC8;
    --text-3: #8D97A5;
    --brand: #8DB4E2;
    --brand-hover: #A3C3EA;
    --brand-press: #B7D0EE;
    --brand-weak: #1A2636;
    --on-brand: #0B1626;
    --ok: #7FD1A4;
    --ok-weak: #13281E;
    --warn: #E8C27A;
    --warn-weak: #2A2213;
    --danger: #F2A19B;
    --danger-weak: #2C1716;
    --overlay: rgba(0, 0, 0, .82);
    --ring: 0 0 0 3px rgba(141, 180, 226, .4);
  }
}

/* ------------------------------------------------------------ 基础 */

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-wrap: anywhere;
}
h1, h2, h3, p, ul, ol, dl, dd, figure { margin: 0; }
h1, h2, h3 { line-height: 1.3; font-weight: 650; letter-spacing: -0.01em; }
h1, .h1 { font-size: 28px; }
h2, .h2 { font-size: 22px; }
h3, .h3 { font-size: 18px; }
ul[role="list"], ol[role="list"] { list-style: none; padding: 0; }
a { color: var(--brand); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--brand-hover); }
img, svg { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; }
strong { font-weight: 650; }
.icon { flex: none; }
:focus-visible { outline: 2px solid var(--brand); outline-offset: 2px; border-radius: 4px; }

.tnum { font-variant-numeric: tabular-nums; }
.nobreak { display: inline-block; }
.muted { color: var(--text-2); }
.small { font-size: 14px; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.skip-link { position: absolute; left: var(--s4); top: -48px; z-index: 50; padding: var(--s2) var(--s4);
  background: var(--brand); color: var(--on-brand); border-radius: var(--radius-sm); }
.skip-link:focus { top: var(--s2); color: var(--on-brand); }
.js .no-js-only, .js-only { display: none !important; }
.js .js-only { display: inline-flex !important; }
[hidden] { display: none !important; }

.container { width: 100%; max-width: 1120px; margin: 0 auto; padding: 0 var(--s4); }
.narrow { max-width: 760px; }
.narrow-form { max-width: 480px; }
.narrow-pay { max-width: 480px; display: grid; gap: var(--s4); }
.narrow-order { max-width: 720px; display: grid; gap: var(--s4); }
.site-main { flex: 1; padding-bottom: var(--s8); }
.page-home .site-main { padding-bottom: 0; }
.page-home .site-main > .section-alt:last-child { border-bottom: 0; }

/* ------------------------------------------------------------ 页眉、公告、页脚 */

.announcement { background: var(--brand-weak); color: var(--text); font-size: 14px; }
.announcement .container { display: flex; gap: var(--s2); align-items: center; padding-top: var(--s2); padding-bottom: var(--s2); }
.announcement .icon { color: var(--brand); }

.site-header {
  position: sticky; top: 0; z-index: 20;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  border-bottom: 1px solid var(--border);
  backdrop-filter: saturate(1.2) blur(8px);
  -webkit-backdrop-filter: saturate(1.2) blur(8px);
}
@supports not (background: color-mix(in srgb, red 50%, transparent)) {
  .site-header { background: var(--bg); }
}
.header-inner { height: 56px; display: flex; align-items: center; justify-content: space-between; gap: var(--s4); }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; min-height: 44px; }
.brand:hover { color: var(--text); }
.brand-name { font-weight: 700; font-size: 18px; letter-spacing: .01em; }
.logo-mark-bg { fill: var(--brand); }
.logo-mark-fg { stroke: var(--on-brand); }
.logo-mark-dot { fill: var(--on-brand); }
.site-nav { display: flex; align-items: center; gap: var(--s1); }
.nav-link {
  display: inline-flex; align-items: center; gap: 6px; min-height: 44px; padding: 0 var(--s3);
  color: var(--text-2); text-decoration: none; border-radius: var(--radius-sm); font-size: 15px;
}
.nav-link:hover { color: var(--text); background: var(--surface-2); }
.nav-cta { color: var(--text); border: 1px solid var(--border-strong); background: var(--surface); }
.nav-cta:hover { border-color: var(--text-3); background: var(--surface); }
.hide-sm { display: none; }

.flash-wrap { padding-top: var(--s4); }
.flash { display: flex; gap: var(--s2); align-items: flex-start; padding: var(--s3) var(--s4); border-radius: var(--radius);
  background: var(--brand-weak); font-size: 14px; }
.flash .icon { color: var(--brand); margin-top: 2px; }

.site-footer { border-top: 1px solid var(--border); background: var(--surface); padding: var(--s6) 0 var(--s5); font-size: 14px; }
.footer-grid { display: grid; gap: var(--s5); grid-template-columns: 1fr 1fr; }
.footer-brand { grid-column: 1 / -1; display: grid; gap: var(--s2); align-content: start; }
.footer-brand .brand { min-height: 0; }
.footer-brand .brand-name { font-size: 16px; }
.footer-links { display: grid; gap: var(--s2); align-content: start; }
.footer-contact { grid-column: 1 / -1; }
.footer-links a { color: var(--text-2); text-decoration: none; display: flex; align-items: center; min-height: 44px; }
.footer-links { gap: 0; }
.footer-heading { margin-bottom: var(--s1); }
.footer-links a:hover { color: var(--text); text-decoration: underline; }
.footer-heading { font-weight: 600; color: var(--text); }
.footer-links a, .footer-links span { overflow-wrap: normal; }
.footer-bottom { margin-top: var(--s6); padding-top: var(--s4); border-top: 1px solid var(--border); display: grid; gap: var(--s2); }
.disclaimer { color: var(--text-3); font-size: 13px; line-height: 1.7; }

/* ------------------------------------------------------------ 按钮 */

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--s2);
  min-height: 44px; padding: 0 var(--s5); border-radius: var(--radius);
  border: 1px solid transparent; font-size: 16px; font-weight: 600; line-height: 1.2;
  text-decoration: none; cursor: pointer; user-select: none; white-space: nowrap;
  transition: background-color .15s var(--ease), border-color .15s var(--ease), color .15s var(--ease);
}
.btn:focus-visible { outline: none; box-shadow: var(--ring); }
.btn-lg { min-height: 52px; font-size: 17px; }
.btn-block { display: flex; width: 100%; }
.btn-primary { background: var(--brand); color: var(--on-brand); }
.btn-primary:hover { background: var(--brand-hover); color: var(--on-brand); }
.btn-primary:active { background: var(--brand-press); }
.btn-secondary { background: var(--surface); color: var(--text); border-color: var(--border-strong); }
.btn-secondary:hover { border-color: var(--text-3); color: var(--text); }
.btn-ghost { background: transparent; color: var(--brand); border-color: transparent; }
.btn-ghost:hover { background: var(--brand-weak); }
.btn[disabled], .btn.is-disabled, .btn[aria-busy="true"] { opacity: .55; cursor: not-allowed; pointer-events: none; }
.btn.is-copied { color: var(--ok); border-color: currentColor; }
.btn-primary.is-copied { background: var(--ok); color: var(--surface); border-color: var(--ok); }
.link-arrow { display: inline-flex; align-items: center; gap: 6px; font-weight: 600; text-decoration: none; min-height: 44px; }
.back-link { display: inline-flex; align-items: center; gap: 6px; color: var(--text-2); text-decoration: none; min-height: 44px; }
.back-link:hover { color: var(--text); }

/* ------------------------------------------------------------ 通用组件 */

.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: var(--s5) var(--s4); }
.eyebrow { color: var(--brand); font-weight: 600; font-size: 14px; letter-spacing: .02em; margin-bottom: var(--s2); }
.lead { font-size: 17px; color: var(--text-2); }

.badge { display: inline-flex; align-items: center; height: 26px; padding: 0 10px; border-radius: 999px;
  font-size: 13px; font-weight: 600; white-space: nowrap; }
.badge-neutral { background: var(--surface-2); color: var(--text-2); }
.badge-brand { background: var(--brand-weak); color: var(--brand); }
.badge-ok { background: var(--ok-weak); color: var(--ok); }
.badge-warn { background: var(--warn-weak); color: var(--warn); }

.notice { display: flex; gap: var(--s3); padding: var(--s4); border-radius: var(--radius); border: 1px solid transparent; }
.notice-icon { margin-top: 2px; }
.notice-body { display: grid; gap: var(--s1); min-width: 0; }
.notice-title { font-weight: 650; }
.notice-text { color: var(--text-2); font-size: 15px; }
.notice-info, .notice-brand { background: var(--brand-weak); }
.notice-info .notice-icon, .notice-brand .notice-icon { color: var(--brand); }
.notice-ok { background: var(--ok-weak); }
.notice-ok .notice-icon { color: var(--ok); }
.notice-warn { background: var(--warn-weak); }
.notice-warn .notice-icon { color: var(--warn); }
.notice-danger { background: var(--danger-weak); }
.notice-danger .notice-icon, .notice-danger .notice-title { color: var(--danger); }
.notice-danger .notice-text { color: var(--text); }

.spinner { width: 28px; height: 28px; border-radius: 50%; border: 2.5px solid var(--border-strong);
  border-top-color: var(--brand); animation: spin .8s linear infinite; flex: none; }
.spinner-sm { width: 16px; height: 16px; border-width: 2px; }
@keyframes spin { to { transform: rotate(360deg); } }
.appear { animation: appear .35s var(--ease) both; }
@keyframes appear { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }

.empty { display: grid; justify-items: center; gap: var(--s2); text-align: center; padding: var(--s7) var(--s4);
  border: 1px dashed var(--border-strong); border-radius: var(--radius-lg); color: var(--text-2); }
.empty-title { font-weight: 650; color: var(--text); }

/* ------------------------------------------------------------ 表单 */

.form { display: grid; gap: var(--s4); }
.field { display: grid; gap: 6px; }
.field label { font-weight: 600; font-size: 15px; }
.field input, .field textarea, .field select {
  width: 100%; min-height: 48px; padding: 0 14px; border: 1px solid var(--input-border); border-radius: var(--radius);
  background: var(--surface); font-size: 16px; transition: border-color .15s var(--ease), box-shadow .15s var(--ease);
}
.field textarea { padding: 12px 14px; min-height: 120px; resize: vertical; line-height: 1.6; }
.field input::placeholder { color: var(--text-3); opacity: .8; }
.field input:focus, .field textarea:focus, .field select:focus { outline: none; border-color: var(--brand); box-shadow: var(--ring); }
.help { color: var(--text-3); font-size: 13px; }
.checkbox { display: flex; gap: 10px; align-items: flex-start; min-height: 44px; padding: 10px 0; font-size: 14px; color: var(--text-2); cursor: pointer; }
.checkbox input { width: 20px; height: 20px; margin: 1px 0 0; accent-color: var(--brand); flex: none; }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

/* ------------------------------------------------------------ 首页 */

.hero { padding: var(--s6) 0 var(--s7); }
.hero-grid { display: grid; gap: var(--s6); align-items: center; }
.hero-title { font-size: 30px; line-height: 1.25; letter-spacing: -0.02em; margin-bottom: var(--s3); word-break: keep-all; }
.hero-actions { display: grid; gap: var(--s3); margin-top: var(--s5); }
.hero-points { list-style: none; padding: 0; display: flex; flex-wrap: wrap; gap: var(--s2) var(--s5); margin-top: var(--s5); color: var(--text-2); font-size: 14px; }
.hero-points li { display: inline-flex; align-items: center; gap: 6px; }
.hero-points .icon { color: var(--brand); }
.hero-visual { display: none; }
.preview-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg);
  padding: var(--s5); display: grid; gap: var(--s4); max-width: 400px; margin-left: auto; }
.preview-head { display: flex; justify-content: space-between; align-items: center; }
.preview-title { font-weight: 600; color: var(--text-2); font-size: 14px; }
.preview-label { font-size: 13px; color: var(--text-3); margin-bottom: calc(var(--s2) * -1); }
.preview-code { font-family: var(--font-mono); font-size: 15px; letter-spacing: .04em; padding: var(--s3) var(--s4);
  background: var(--surface-2); border: 1px solid var(--border); border-radius: var(--radius); color: var(--text-2); }
.preview-actions { display: flex; gap: var(--s4); align-items: center; font-size: 14px; }
.preview-btn { display: inline-flex; align-items: center; gap: 6px; height: 36px; padding: 0 var(--s3);
  background: var(--brand); color: var(--on-brand); border-radius: 10px; font-weight: 600; }
.preview-link { color: var(--brand); font-weight: 600; }

.section { padding: var(--s7) 0; }
.section-alt { background: var(--surface); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.section-head { display: grid; gap: var(--s2); margin-bottom: var(--s5); }
.section-more { margin-top: var(--s4); }

.plans { display: grid; gap: var(--s4); }
.plan { display: flex; flex-direction: column; gap: var(--s3); background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 20px; transition: border-color .15s var(--ease); }
.plan:hover { border-color: var(--border-strong); }
.plan-name { font-size: 19px; }
.plan-tagline { color: var(--text-2); font-size: 14px; margin-top: var(--s1); }
.plan-price, .purchase-price { display: flex; align-items: baseline; gap: 2px; }
.plan-price .currency, .purchase-price .currency { font-size: 18px; font-weight: 600; }
.plan-price .amount, .purchase-price .amount { font-size: 36px; font-weight: 700; letter-spacing: -0.02em; line-height: 1.1; }
.plan-price .period, .purchase-price .period { margin-left: 6px; color: var(--text-3); font-size: 14px; }
.plan-features { display: grid; gap: var(--s2); font-size: 14px; color: var(--text-2); flex: 1; }
.plan-features li, .check-list li { display: flex; gap: var(--s2); align-items: flex-start; }
.plan-features .icon, .check-list .icon { color: var(--brand); margin-top: 2px; }
.plan.is-unavailable .plan-price { color: var(--text-3); }

.howto { display: grid; gap: var(--s5); counter-reset: none; }
.howto li { display: grid; gap: var(--s2); align-content: start; }
.howto-num { display: inline-grid; place-items: center; width: 32px; height: 32px; border-radius: 50%;
  background: var(--brand-weak); color: var(--brand); font-weight: 700; font-size: 15px; }
.howto h3 { font-size: 17px; }

.trust { display: grid; gap: var(--s4); }
.trust li { display: flex; gap: var(--s4); align-items: flex-start; padding: var(--s4); border: 1px solid var(--border);
  border-radius: var(--radius-lg); background: var(--surface); }
.trust h3 { font-size: 16px; margin-bottom: 2px; }
.trust p { font-size: 14px; }
.trust-icon { display: inline-grid; place-items: center; width: 40px; height: 40px; border-radius: var(--radius);
  background: var(--brand-weak); color: var(--brand); flex: none; }

.faq { display: grid; border-top: 1px solid var(--border); }
.faq-item { border-bottom: 1px solid var(--border); }
.faq-item summary { display: flex; justify-content: space-between; align-items: center; gap: var(--s4);
  min-height: 56px; padding: var(--s3) 0; cursor: pointer; list-style: none; font-weight: 600; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-chevron { color: var(--text-3); transition: transform .2s var(--ease); }
.faq-item[open] .faq-chevron { transform: rotate(180deg); }
.faq-answer { padding: 0 0 var(--s4); color: var(--text-2); }
.faq-contact { margin-top: var(--s6); display: grid; gap: var(--s3); }

/* ------------------------------------------------------------ 商品页 */

.page-top { padding-top: var(--s3); }
.product-grid { display: grid; gap: var(--s5); padding-top: var(--s2); }
.product-info { display: grid; gap: var(--s5); order: 2; }
.product-info h1 { font-size: 28px; }
.product-head { display: grid; gap: var(--s2); }
.product-head .eyebrow { margin-bottom: 0; }
.info-block { display: grid; gap: var(--s2); padding-top: var(--s5); border-top: 1px solid var(--border); }
.info-block h2 { font-size: 17px; }
.info-block p { color: var(--text-2); }
.check-list { display: grid; gap: var(--s2); color: var(--text-2); }
.mini-steps { display: grid; gap: var(--s2); color: var(--text-2); }
.mini-steps li { display: flex; gap: var(--s3); align-items: center; }
.mini-num { display: inline-grid; place-items: center; width: 24px; height: 24px; border-radius: 50%; flex: none;
  background: var(--surface-2); color: var(--text-2); font-size: 13px; font-weight: 700; }
.purchase { order: 1; }
.purchase-card { display: grid; gap: var(--s4); }
.purchase-name { font-weight: 600; color: var(--text-2); }
.purchase-price { margin-top: calc(var(--s3) * -1); }
.purchase-notes { display: grid; gap: var(--s2); font-size: 13px; color: var(--text-3); padding-top: var(--s4);
  border-top: 1px solid var(--border); }
.purchase-notes li { display: flex; gap: var(--s2); align-items: center; }

/* ------------------------------------------------------------ 支付页 */

.page-pay .site-main { padding-top: var(--s4); }
.pay-card { display: grid; gap: var(--s4); text-align: center; padding: var(--s5) var(--s4); }
.pay-head { display: grid; gap: var(--s1); }
.pay-product { font-size: 18px; font-weight: 600; }
.pay-amount { font-weight: 700; font-size: 40px; letter-spacing: -0.02em; line-height: 1.15; }
.pay-amount .currency { font-size: 22px; margin-right: 2px; }
.pay-open { margin-top: var(--s1); }
.pay-or { margin-top: calc(var(--s2) * -1); }
.qr-box { position: relative; justify-self: center; width: 232px; height: 232px; padding: 8px; background: #FFFFFF;
  border: 1px solid var(--border); border-radius: var(--radius); }
.qr-box .qr-svg, .qr-box img { width: 100%; height: 100%; }
.qr-mask { position: absolute; inset: 0; display: grid; place-items: center; border-radius: var(--radius);
  background: rgba(255, 255, 255, .9); color: #121821; font-weight: 650; }
.qr-box.is-expired .qr-svg { opacity: .2; }
.pay-hint { display: inline-flex; justify-content: center; align-items: center; gap: 6px; color: var(--text-2); font-size: 15px; }
.pay-hint .icon { color: var(--brand); }
.countdown { display: inline-flex; justify-content: center; align-items: center; gap: 6px; color: var(--text-2); font-size: 15px; }
.countdown strong { color: var(--text); font-size: 17px; }
.countdown.is-expired { color: var(--warn); }
.pay-state { display: grid; justify-items: center; gap: var(--s2); padding: var(--s5) 0; }
.pay-state-title { font-weight: 650; font-size: 17px; }
.pay-status { display: flex; justify-content: center; align-items: center; gap: var(--s2); color: var(--text-2); font-size: 14px;
  padding: var(--s3); background: var(--surface-2); border-radius: var(--radius); }
.no-js .pay-status .spinner { display: none; }
.poll-error { display: flex; justify-content: center; gap: 6px; align-items: center; color: var(--warn); }
.pay-actions { display: grid; }
.dev-box { display: grid; gap: var(--s2); padding: var(--s3); border: 1px dashed var(--border-strong);
  border-radius: var(--radius); text-align: left; color: var(--text-2); }
.help-card { display: grid; gap: var(--s3); }
.tips { display: grid; gap: var(--s2); color: var(--text-2); font-size: 14px; padding-left: 1.2em; margin: 0; }
.help-actions { display: flex; flex-wrap: wrap; gap: var(--s2); }
.support-list { display: grid; gap: var(--s2); list-style: none; padding: 0; margin: 0; font-size: 14px; color: var(--text-2); }
.support-list li { display: flex; gap: var(--s2); align-items: center; min-height: 28px; }
.support-list .icon { color: var(--text-3); }

.wx-overlay { position: fixed; inset: 0; z-index: 60; background: var(--overlay); color: #FFFFFF;
  display: grid; align-content: start; justify-items: end; padding: var(--s3) var(--s4); }
.wx-arrow { width: 72px; height: 72px; color: #FFFFFF; margin-right: var(--s2); }
.wx-panel { justify-self: stretch; margin-top: var(--s4); padding: var(--s5); border-radius: var(--radius-lg);
  background: var(--surface); color: var(--text); display: grid; gap: var(--s3); }
.wx-panel p { color: var(--text-2); }

/* ------------------------------------------------------------ 订单页 */

.order-head { display: grid; gap: var(--s2); padding-top: var(--s5); }
.order-title-row { display: flex; align-items: center; justify-content: space-between; gap: var(--s3); flex-wrap: wrap; }
.progress { display: grid; grid-template-columns: repeat(3, 1fr); list-style: none; padding: 0; margin: var(--s4) 0 var(--s2); }
.progress-step { position: relative; display: grid; justify-items: center; gap: 6px; text-align: center;
  font-size: 13px; color: var(--text-3); }
.progress-step::before { content: ""; position: absolute; top: 13px; right: 50%; width: 100%; height: 2px;
  background: var(--border); z-index: 0; }
.progress-step:first-child::before { display: none; }
.progress-step.is-done::before, .progress-step.is-current::before { background: var(--brand); }
.progress-dot { position: relative; z-index: 1; display: grid; place-items: center; width: 28px; height: 28px; border-radius: 50%;
  background: var(--surface); border: 2px solid var(--border-strong); font-weight: 700; font-size: 13px; color: var(--text-3); }
.progress-step.is-done .progress-dot { background: var(--brand); border-color: var(--brand); color: var(--on-brand); }
.progress-step.is-current .progress-dot { border-color: var(--brand); color: var(--brand); }
.progress-step.is-current .progress-label, .progress-step.is-done .progress-label { color: var(--text); font-weight: 600; }
.progress-step.is-attention .progress-dot { border-color: var(--warn); color: var(--warn); }
.progress-compact { margin: 0; }
.progress-compact .progress-dot { width: 24px; height: 24px; }
.progress-compact .progress-step::before { top: 11px; }

.state-card { display: grid; justify-items: center; gap: var(--s3); text-align: center; }
.state-card .notice { text-align: left; justify-self: stretch; }
.state-card .btn-block { justify-self: stretch; }
.state-actions { display: flex; justify-content: center; }

.cdk-card { display: grid; gap: var(--s4); border-color: var(--border-strong); }
.cdk-head { display: flex; gap: var(--s3); align-items: center; }
.cdk-icon { display: inline-grid; place-items: center; width: 44px; height: 44px; border-radius: var(--radius);
  background: var(--ok-weak); color: var(--ok); flex: none; }
.cdk-code { font-family: var(--font-mono); font-size: 17px; font-weight: 600; letter-spacing: .05em; line-height: 1.5;
  padding: var(--s4); background: var(--surface-2); border: 1px solid var(--border); border-radius: var(--radius);
  word-break: break-all; user-select: all; -webkit-user-select: all; text-align: center; }
.cdk-actions { display: grid; gap: var(--s3); }
.cdk-warning { display: flex; gap: 6px; align-items: flex-start; color: var(--text-3); }
.cdk-warning .icon { margin-top: 3px; }

.kv { display: grid; margin: var(--s3) 0 var(--s4); }
.kv > div { display: flex; justify-content: space-between; gap: var(--s4); padding: 10px 0; border-bottom: 1px solid var(--border); font-size: 15px; }
.kv > div:last-child { border-bottom: 0; }
.kv dt { color: var(--text-3); flex: none; }
.kv dd { text-align: right; min-width: 0; }
.save-hint { display: flex; gap: 6px; align-items: flex-start; color: var(--text-3); margin-bottom: var(--s3); }
.save-hint .icon { margin-top: 2px; }
.narrow-order > .card { display: grid; gap: var(--s3); }
.narrow-order > .card > .kv, .narrow-order > .card > .save-hint { margin: 0; }

/* ------------------------------------------------------------ 查单、内容、错误页 */

.form-card { display: grid; gap: var(--s4); margin-top: var(--s6); }
.form-icon { display: inline-grid; place-items: center; width: 44px; height: 44px; border-radius: var(--radius);
  background: var(--brand-weak); color: var(--brand); }
.form-foot { padding-top: var(--s2); }

.article { padding-top: var(--s6); }
.article > h1 { margin-bottom: var(--s5); }
.prose { color: var(--text-2); }
.prose > * + * { margin-top: var(--s3); }
.prose h2 { font-size: 18px; color: var(--text); margin-top: var(--s5); }
.prose h3, .prose h4 { font-size: 16px; color: var(--text); margin-top: var(--s4); }
.prose ul, .prose ol { padding-left: 1.3em; display: grid; gap: 6px; }
.prose blockquote { margin: 0; padding: var(--s3) var(--s4); border-left: 3px solid var(--warn); background: var(--warn-weak);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0; color: var(--text); font-size: 14px; }
.prose code { font-family: var(--font-mono); font-size: .92em; padding: 1px 6px; border-radius: 6px; background: var(--surface-2); }
.prose hr { border: 0; border-top: 1px solid var(--border); margin: var(--s5) 0; }
.prose strong { color: var(--text); }

.error-page { display: grid; gap: var(--s3); text-align: center; justify-items: center; padding: var(--s8) 0 var(--s6); }
.error-page p, .state-card p, .pay-or, .section-head p { text-wrap: balance; }
.error-code { font-size: 56px; font-weight: 700; color: var(--border-strong); letter-spacing: -0.02em; line-height: 1; }
.error-actions { display: flex; flex-wrap: wrap; justify-content: center; gap: var(--s3); margin-top: var(--s3); }

/* ------------------------------------------------------------ 响应式 */

@media (min-width: 480px) {
  .hero-actions { display: flex; flex-wrap: wrap; }
  .cdk-actions { display: flex; flex-wrap: wrap; }
  .cdk-actions .btn { flex: 1 1 auto; }
}

@media (min-width: 640px) {
  .footer-grid { grid-template-columns: 1fr 1fr 1.4fr; }
  .footer-contact { grid-column: auto; }
  .plans { grid-template-columns: repeat(2, 1fr); }
  .trust { grid-template-columns: repeat(2, 1fr); }
  .howto { grid-template-columns: repeat(3, 1fr); }
  .card { padding: var(--s5); }
  .pay-card { padding: var(--s6) var(--s5); }
}

@media (min-width: 768px) {
  .container { padding: 0 var(--s5); }
  .header-inner { height: var(--header-h); }
  .hide-sm { display: inline-flex; }
  h1, .h1 { font-size: 32px; }
  h2, .h2 { font-size: 24px; }
  .hero { padding: var(--s8) 0 var(--s6); }
  .plan { gap: var(--s4); padding: var(--s5); }
  .hero-title { font-size: 40px; }
  .section { padding: var(--s8) 0; }
  .product-grid { padding-top: var(--s4); }
  .purchase { max-width: 560px; }
  .product-info h1 { font-size: 34px; }
  .cdk-code { font-size: 19px; }
}

@media (min-width: 960px) {
  .product-grid { grid-template-columns: minmax(0, 1fr) 380px; gap: var(--s7); align-items: start; }
  .product-info { order: 1; }
  .purchase { order: 2; position: sticky; top: calc(var(--header-h) + var(--s5)); max-width: none; }
}

@media (min-width: 1024px) {
  .footer-grid { grid-template-columns: 2fr 1fr 1fr 1.4fr; }
  .footer-brand { grid-column: auto; }
  .hero-grid { grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); gap: var(--s8); }
  .hero-visual { display: block; }
  .hero-title { font-size: 44px; }
  .plans { grid-template-columns: repeat(4, 1fr); }
  .trust { grid-template-columns: repeat(4, 1fr); }
  .trust li { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important;
    transition-duration: .001ms !important; }
  .spinner { border-top-color: var(--border-strong); border-right-color: var(--brand); }
}

@media print {
  .site-header, .site-footer, .help-actions, .cdk-actions, .pay-actions { display: none !important; }
  body { background: #FFFFFF; color: #000000; }
}