/* ==========================================================================
   华扣钮扣 · 官网设计系统
   基调：白底 + 石墨灰正文 + 深蓝主色；大留白、细线、无花哨动效
   说明：全站唯一样式表。所有页面只允许使用本文件中已定义的组件类。
   ========================================================================== */

/* ---------- 1. Design tokens ---------- */
:root {
  --c-ink: #161d26;
  --c-body: #39424e;
  --c-muted: #6f7885;
  --c-line: #e4e7eb;
  --c-line-strong: #c9ced5;
  --c-bg: #ffffff;
  --c-bg-soft: #f6f7f9;
  --c-navy: #123a5f;
  --c-navy-dark: #0b2a47;
  --c-navy-soft: #eef3f8;
  --c-white: #ffffff;
  --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", "Noto Sans SC", "Source Han Sans SC", "Segoe UI", Arial, sans-serif;
  --container: 1200px;
  --gutter: 24px;
  --section-y: clamp(72px, 9vw, 128px);
  --radius: 10px;
  --t: 180ms ease;
}

/* ---------- 2. Reset ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.85;
  color: var(--c-body);
  background: var(--c-bg);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6, p, figure, blockquote, dl, dd {
  margin: 0;
}
ul, ol {
  margin: 0;
  padding: 0;
  list-style: none;
}
img, svg {
  display: block;
  max-width: 100%;
}
a {
  color: var(--c-navy);
  text-decoration: none;
  transition: color var(--t);
}
a:hover {
  color: var(--c-navy-dark);
}
button {
  font: inherit;
  color: inherit;
}
address {
  font-style: normal;
}
table {
  border-collapse: collapse;
  width: 100%;
}

:focus-visible {
  outline: 2px solid var(--c-navy);
  outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {
  html {
  scroll-behavior: auto;
}
  *, *::before, *::after {
  transition-duration: 0.01ms !important;
  animation-duration: 0.01ms !important;
}
}

/* ---------- 3. Layout primitives ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section {
  padding-block: var(--section-y);
}
.section--soft {
  background: var(--c-bg-soft);
}
.section--navy {
  background: var(--c-navy);
  color: #dbe6f1;
}
.section--navy h2, .section--navy h3, .section--navy .section-head__title {
  color: var(--c-white);
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 200;
  padding: 12px 20px;
  background: var(--c-navy);
  color: var(--c-white);
  font-size: 14px;
}
.skip-link:focus {
  left: 0;
}

.visually-hidden {
  position: absolute !important;
  width: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.h1, .h2, .h3 {
  color: var(--c-ink);
  font-weight: 700;
  line-height: 1.28;
  letter-spacing: 0.01em;
}
.h1 {
  font-size: clamp(32px, 4.6vw, 52px);
  line-height: 1.22;
  letter-spacing: -0.01em;
}
.h2 {
  font-size: clamp(26px, 3.2vw, 38px);
}
.h3 {
  font-size: clamp(19px, 1.7vw, 22px);
  line-height: 1.5;
}

.lead {
  font-size: clamp(16px, 1.5vw, 18px);
  line-height: 1.9;
  color: var(--c-muted);
}

.text-muted {
  color: var(--c-muted);
}
.accent {
  color: var(--c-navy);
}

/* ---------- 5. Section head ---------- */
.section-head {
  max-width: 760px;
  margin-bottom: clamp(36px, 4vw, 56px);
}
.section-head--center {
  margin-inline: auto;
  text-align: center;
}
.section-head__title {
  margin-bottom: 14px;
}
.section-head__lead {
  font-size: 16px;
  line-height: 1.9;
  color: var(--c-muted);
}

/* ---------- 6. Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 48px;
  padding: 12px 26px;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  text-align: center;
  cursor: pointer;
  transition: background var(--t), color var(--t), border-color var(--t);
}
.btn--primary {
  background: var(--c-navy);
  color: var(--c-white);
}
.btn--primary:hover,
.btn--primary:focus-visible {
  background: var(--c-navy-dark);
  color: var(--c-white);
}

.btn--ghost {
  background: transparent;
  color: var(--c-ink);
  background: var(--c-bg-soft); color: var(--c-ink);
}
.btn--ghost:hover,
.btn--ghost:focus-visible {
  color: var(--c-navy);
}

.btn--light {
  background: var(--c-white);
  color: var(--c-navy);
}
.btn--light:hover,
.btn--light:focus-visible {
  background: #e8eef5;
  color: var(--c-navy-dark);
}

.btn--outline-light {
  background: transparent;
  color: var(--c-white);
  background: rgba(255, 255, 255, 0.12);
}
.btn--outline-light:hover,
.btn--outline-light:focus-visible {
  color: var(--c-white);
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}
.btn--sm {
  min-height: 40px;
  padding: 8px 18px;
  font-size: 14px;
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--c-navy);
}
.text-link::after {
  content: "→";
}

/* ---------- 7. Top bar + header ---------- */
.topbar {
  background: var(--c-navy-dark);
  color: #c3d3e2;
  font-size: 13px;
  line-height: 1.6;
}
.topbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 42px;
  padding-block: 8px;
}
.topbar__note {
  letter-spacing: 0.02em;
}
.topbar__contact {
  display: flex;
  gap: 22px;
  flex-wrap: wrap;
}
.topbar__contact a {
  color: #dbe7f3;
}
.topbar__contact a:hover {
  color: var(--c-white);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--c-bg);
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 76px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.brand__mark {
  width: 38px;
  height: 38px;
  flex-shrink: 0;
}
.brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}
.brand__text strong {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--c-ink);
}
.brand__text small {
  margin-top: 3px;
  font-size: 9.5px;
  letter-spacing: 0.22em;
  color: var(--c-muted);
}

.nav {
  display: flex;
  align-items: center;
  gap: 30px;
  min-width: 0;
}
.nav__list {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav__link {
  display: block;
  padding: 10px 14px;
  font-size: 15px;
  color: var(--c-ink);
}
.nav__link:hover {
  color: var(--c-navy);
}
.nav__link.is-active {
  color: var(--c-navy);
  font-weight: 600;
}
.nav__cta {
  margin-left: 6px;
}
.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 0;
  background: transparent;
  border-radius: var(--radius);
  cursor: pointer;
  background: var(--c-bg-soft);
}
.nav-toggle span {
  display: block;
  width: 18px;
  height: 1.5px;
  margin: 4px auto;
  background: var(--c-ink);
  transition: transform var(--t), opacity var(--t);
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(5.5px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-5.5px) rotate(-45deg);
}

/* ---------- 8. Hero ---------- */
.hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(48px, 6vw, 88px) clamp(40px, 5vw, 72px);
}
.hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  align-items: center;
  gap: clamp(32px, 5vw, 72px);
}
.hero__content {
  max-width: 620px;
}
.hero__title {
  margin: 18px 0 22px;
}
.hero__lead {
  font-size: clamp(16px, 1.5vw, 18px);
  line-height: 1.95;
  color: var(--c-muted);
  max-width: 560px;
}
.hero__actions {
  margin-top: 32px;
}
.hero__points {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  margin-top: 32px;
  padding-top: 24px;
}
.hero__point {
  font-size: 14px;
  color: var(--c-body);
}
.hero__point::before {
  content: "";
  display: inline-block;
  width: 5px;
  height: 5px;
  margin-right: 8px;
  vertical-align: middle;
  background: var(--c-navy);
  border-radius: 50%;
}
.hero__visual {
  position: relative;
}
.hero__visual img {
  width: 100%;
  height: auto;
  border-radius: var(--radius);
}
.hero__caption {
  margin-top: 10px;
  font-size: 13px;
  color: var(--c-muted);
  text-align: right;
}

/* ---------- 9. Stats ---------- */
.stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}
.stats__item {
  padding: 28px 24px;
}
.stats__num {
  display: block;
  font-size: clamp(26px, 3vw, 36px);
  font-weight: 700;
  line-height: 1.2;
  color: var(--c-navy);
  letter-spacing: -0.01em;
}
.stats__num small {
  font-size: 0.55em;
  font-weight: 600;
  margin-left: 2px;
}
.stats__label {
  margin-top: 8px;
  font-size: 13px;
  color: var(--c-muted);
}
.stats-note {
  margin-top: 14px;
  font-size: 13px;
  color: var(--c-muted);
}

/* ---------- 10. Cards grid ---------- */
.grid {
  display: grid;
  gap: 24px;
}
.grid--2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.grid--3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}
.grid--4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.card {
  display: flex;
  flex-direction: column;
  background: var(--c-bg);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color var(--t);
}
.card__media {
  background: var(--c-bg-soft);
}
.card__media img {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}
.card__body {
  display: flex;
  flex-direction: column;
  flex: 1;
  padding: 24px;
}
.card__title {
  font-size: 19px;
  font-weight: 700;
  color: var(--c-ink);
  line-height: 1.5;
}
.card__title a {
  color: inherit;
}
.card__title a:hover {
  color: var(--c-navy);
}
.card__desc {
  margin-top: 10px;
  font-size: 14px;
  line-height: 1.85;
  color: var(--c-muted);
}
.card__foot {
  margin-top: auto;
  padding-top: 20px;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 14px;
}
.tag {
  display: inline-block;
  padding: 3px 9px;
  background: var(--c-bg-soft);
  border-radius: var(--radius);
  font-size: 13px;
  line-height: 1.6;
  color: var(--c-muted);
}

/* feature card (icon-less, number-led) */
.feature {
  padding: 28px;
  background: var(--c-bg);
  border-radius: var(--radius);
}
.feature__num {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--c-line-strong);
}
.feature__title {
  margin-top: 10px;
  font-size: 18px;
  font-weight: 700;
  color: var(--c-ink);
  line-height: 1.5;
}
.feature__desc {
  margin-top: 10px;
  font-size: 14px;
  line-height: 1.85;
  color: var(--c-muted);
}

/* application card */
.app-card {
  display: flex;
  gap: 18px;
  align-items: flex-start;
  padding: 24px;
  background: var(--c-bg);
  border-radius: var(--radius);
}
.app-card__icon {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
}
.app-card__title {
  font-size: 17px;
  font-weight: 700;
  color: var(--c-ink);
}
.app-card__desc {
  margin-top: 6px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-muted);
}

/* ---------- 11. Split (media + text) ---------- */
.split {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-items: center;
  gap: clamp(32px, 5vw, 72px);
}
.split--reverse .split__media {
  order: 1;
}
.split--reverse .split__body {
  order: 2;
}
.split__media img {
  width: 100%;
  height: auto;
  border-radius: var(--radius);
}
.split__body {
  max-width: 560px;
}
.split__title {
  margin: 14px 0 18px;
}
.split__text {
  font-size: 15px;
  line-height: 1.95;
  color: var(--c-muted);
}
.split__text + .split__text {
  margin-top: 14px;
}

.checklist {
  margin-top: 26px;
  display: grid;
  gap: 12px;
}
.checklist li {
  position: relative;
  padding-left: 26px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--c-ink);
}
.checklist li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 12px;
  height: 7px;
  transform: rotate(-45deg);
}
.checklist--loose {
  gap: 16px;
}

/* ---------- 12. Process steps ---------- */
.steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
}
.steps__item {
  padding: 28px 24px 8px;
}
.steps__no {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--c-navy);
}
.steps__title {
  margin-top: 12px;
  font-size: 18px;
  font-weight: 700;
  color: var(--c-ink);
}
.steps__desc {
  margin-top: 8px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-muted);
}

/* ---------- 13. Page hero (inner pages) ---------- */
.page-hero {
  padding-block: clamp(40px, 5vw, 72px) clamp(32px, 4vw, 56px);
  background: var(--c-bg-soft);
}
.page-hero__inner {
  max-width: 820px;
}
.page-hero h1 {
  margin: 16px 0 16px;
}
.page-hero__lead {
  font-size: clamp(15px, 1.4vw, 17px);
  line-height: 1.9;
  color: var(--c-muted);
  max-width: 700px;
}

.breadcrumbs {
  font-size: 13px;
  color: var(--c-muted);
}
.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}
.breadcrumbs li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.breadcrumbs li + li::before {
  content: "/";
  color: var(--c-line-strong);
}
.breadcrumbs a {
  color: var(--c-muted);
}
.breadcrumbs a:hover {
  color: var(--c-navy);
}
.breadcrumbs [aria-current="page"] {
  color: var(--c-ink);
}

/* ---------- 14. Prose (long-form Chinese content) ---------- */
.prose {
  max-width: 820px;
}
.prose h2 {
  margin: 44px 0 16px;
  font-size: clamp(22px, 2.2vw, 28px);
  font-weight: 700;
  line-height: 1.4;
  color: var(--c-ink);
}
.prose h2:first-child {
  margin-top: 0;
}
.prose h3 {
  margin: 32px 0 12px;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--c-ink);
}
.prose p {
  margin: 14px 0;
  font-size: 15.5px;
  line-height: 1.95;
  color: var(--c-body);
}
.prose ul, .prose ol {
  margin: 16px 0;
  padding-left: 22px;
}
.prose ul {
  list-style: none;
  padding-left: 0;
}
.prose ul li {
  position: relative;
  padding-left: 18px;
  margin: 8px 0;
  font-size: 15.5px;
  line-height: 1.9;
}
.prose ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.85em;
  width: 4px;
  height: 4px;
  background: var(--c-navy);
  border-radius: 50%;
}
.prose ol {
  list-style: decimal;
}
.prose ol li {
  margin: 8px 0;
  font-size: 15.5px;
  line-height: 1.9;
}
.prose strong {
  color: var(--c-ink);
  font-weight: 600;
}
.prose blockquote {
  margin: 24px 0;
  padding: 18px 24px;
  background: var(--c-bg-soft);
  color: var(--c-body);
  font-size: 15px;
}
.prose a {
  text-decoration: underline; text-underline-offset: 3px;
}

/* ---------- 15. Spec table ---------- */
.table-wrap {
  overflow-x: auto;
  border-radius: var(--radius);
}
.spec-table {
  min-width: 620px;
  font-size: 14.5px;
}
.spec-table caption {
  caption-side: top;
  padding: 16px 20px;
  text-align: left;
  font-size: 14px;
  color: var(--c-muted);
  background: var(--c-bg-soft);
}
.spec-table th,
.spec-table td {
  padding: 14px 20px;
  text-align: left;
  vertical-align: top;
}
.spec-table thead th {
  background: var(--c-bg-soft);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--c-muted);
  white-space: nowrap;
}
.spec-table tbody th {
  width: 26%;
  font-weight: 600;
  color: var(--c-ink);
  background: #fbfcfd;
}
.faq__item summary {
  position: relative;
  padding: 20px 44px 20px 0;
  font-size: 16px;
  font-weight: 600;
  color: var(--c-ink);
  cursor: pointer;
  list-style: none;
}
.faq__item summary::-webkit-details-marker {
  display: none;
}
.faq__item summary::after {
  content: "+";
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 22px;
  font-weight: 400;
  color: var(--c-muted);
}
.faq__item[open] summary::after {
  content: "−";
}
.faq__answer {
  padding: 0 44px 22px 0;
  font-size: 15px;
  line-height: 1.9;
  color: var(--c-muted);
}
.faq__answer p {
  margin: 8px 0;
}

/* ---------- 17. CTA band ---------- */
.cta-band {
  padding-block: clamp(48px, 6vw, 84px);
  background: var(--c-navy);
  color: #dbe6f1;
}
.cta-band__grid {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
}
.cta-band__title {
  color: var(--c-white);
  font-size: clamp(24px, 2.8vw, 34px);
  line-height: 1.35;
  font-weight: 700;
}
.cta-band__text {
  margin-top: 12px;
  font-size: 15px;
  color: #a9bed3;
  max-width: 580px;
}
.cta-band__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

/* ---------- 18. Contact ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(32px, 5vw, 64px);
  align-items: start;
}
.info-list {
  display: grid;
  gap: 22px;
}
.info-item__label {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-muted);
}
.info-item__value {
  margin-top: 6px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--c-ink);
}
.info-item__value a {
  color: var(--c-ink);
}
.info-item__value a:hover {
  color: var(--c-navy);
}
.info-item__note {
  margin-top: 4px;
  font-size: 13px;
  color: var(--c-muted);
}

.form-card {
  padding: clamp(24px, 3vw, 40px);
  background: var(--c-bg);
  border-radius: var(--radius);
}
.form-card__title {
  font-size: 20px;
  font-weight: 700;
  color: var(--c-ink);
}
.form-card__note {
  margin-top: 8px;
  font-size: 13px;
  color: var(--c-muted);
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 24px;
}
.form-field {
  display: flex;
  flex-direction: column;
  gap: 7px;
}
.form-field--full {
  grid-column: 1 / -1;
}
.form-field label {
  font-size: 14px;
  font-weight: 600;
  color: var(--c-ink);
}
.form-field .req {
  color: var(--c-navy);
}
.form-field input,
.form-field select,
.form-field textarea {
  width: 100%;
  min-height: 46px;
  padding: 10px 14px;
  font: inherit;
  font-size: 15px;
  color: var(--c-ink);
  background: var(--c-bg);
  border-radius: var(--radius);
  transition: border-color var(--t);
}
.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  outline: none;
}
.form-field textarea {
  min-height: 120px;
  resize: vertical;
}
.form-field .hint {
  font-size: 13px;
  color: var(--c-muted);
}
.form-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 24px;
}
.form-status {
  font-size: 14px;
  color: var(--c-navy);
}
.form-status[data-state="error"] {
  color: #a3342c;
}
.form-note {
  margin-top: 18px;
  font-size: 13px;
  line-height: 1.8;
  color: var(--c-muted);
}

/* ---------- 19. Footer ---------- */
.site-footer {
  padding-top: clamp(48px, 6vw, 72px);
  background: var(--c-navy-dark);
  color: #a9bed3;
  font-size: 14px;
  line-height: 1.85;
}
.site-footer a {
  color: #c3d3e2;
}
.site-footer a:hover {
  color: var(--c-white);
}
.site-footer__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) repeat(3, minmax(0, 1fr));
  gap: 40px 32px;
  padding-bottom: 48px;
}
.footer-brand__name {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--c-white);
}
.footer-brand__desc {
  margin-top: 16px;
  max-width: 340px;
  font-size: 14px;
  color: #93a9c0;
}
.footer-contact {
  margin-top: 18px;
  display: grid;
  gap: 4px;
  font-size: 14px;
}
.footer-col h3 {
  margin-bottom: 16px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--c-white);
}
.footer-col ul {
  display: grid;
  gap: 9px;
}
.footer-col li {
  font-size: 14px;
}
.site-footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding-block: 20px;
  font-size: 13px;
  color: #8299af;
}
.site-footer__bottom a {
  color: #93a9c0;
}
.footer-placeholder-note {
  padding: 12px 0 16px;
  font-size: 13px;
  line-height: 1.8;
  color: #6f879e;
}
.footer-icp a {
  color: #93a9c0;
}

/* ---------- 20. Misc ---------- */
.notice {
  padding: 18px 22px;
  background: var(--c-navy-soft);
  font-size: 14px;
  line-height: 1.85;
  color: var(--c-body);
}
.notice strong {
  color: var(--c-ink);
}

.stack-16 > * + * {
  margin-top: 16px;
}
.stack-24 > * + * {
  margin-top: 24px;
}
.stack-32 > * + * {
  margin-top: 32px;
}
.mt-0 {
  margin-top: 0;
}
.mt-24 {
  margin-top: 24px;
}
.mt-40 {
  margin-top: 40px;
}
.mt-48 {
  margin-top: 48px;
}
.mb-0 {
  margin-bottom: 0;
}

/* ---------- 21. Responsive ---------- */
@media (max-width: 1080px) {
  .grid--4 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
  .stats {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
  .site-footer__grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
}

@media (max-width: 920px) {
  .nav {
  position: absolute;
  left: 0;
  right: 0;
  top: 100%;
  display: none;
  flex-direction: column;
  align-items: stretch;
  gap: 0;
  padding: 12px var(--gutter) 24px;
  background: var(--c-bg);
}
  .nav.is-open {
  display: flex;
}
  .nav__list {
  flex-direction: column;
  align-items: stretch;
  gap: 0;
}
  .nav__link {
  padding: 14px 4px;
}
  .nav__link.is-active {
  color: var(--c-navy);
}
  .nav__cta {
  margin: 16px 0 0;
  width: 100%;
}
  .nav-toggle {
  display: block;
  background: var(--c-bg-soft);
}
  .site-header {
  position: sticky;
}
  .site-header__inner {
  position: relative;
}

  .hero__grid,
  .split,
  .contact-grid {
  grid-template-columns: 1fr;
}
  .split--reverse .split__media,
  .split--reverse .split__body {
  order: 0;
}
  .hero__visual {
  max-width: 560px;
}
  .steps {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
  .grid--3 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
  .cta-band__grid {
  flex-direction: column;
  align-items: flex-start;
}
}

@media (max-width: 680px) {
  :root {
  --gutter: 18px;
}
  body {
  font-size: 15.5px;
}
  .topbar__inner {
  justify-content: center;
}
  .topbar__note {
  display: none;
}
  .topbar__contact {
  gap: 14px;
  font-size: 13px;
}
  .grid--2, .grid--3, .grid--4 {
  grid-template-columns: 1fr;
}
  .steps {
  grid-template-columns: 1fr;
}
  .stats {
  grid-template-columns: 1fr;
}
  .form-grid {
  grid-template-columns: 1fr;
}
  .site-footer__grid {
  grid-template-columns: 1fr;
  gap: 32px;
}
  .card__body {
  padding: 20px;
}
  .site-footer__bottom {
  justify-content: flex-start;
}
  .brand__text strong {
  font-size: 18px;
}
  .brand__text small {
  font-size: 8.5px;
}
  .hero__points {
  gap: 8px 18px;
}
}

/* ==========================================================================
   v3 · 审美宪法 + tasteskill 反 AI 味对齐（2026-10-29）
   依据：docs/AESTHETIC-CONSTITUTION.md、docs/TASTE-SKILL-NOTES.md
   做法：去掉装饰（眉标 / 编号 / 细线描边框 / 玻璃 / 位移 / 示意说明），
         用留白、色调分层、尺度与真实内容撑结构。
   注意：老板宪法优先——圆角保持 10px，动效仅颜色过渡。
   ========================================================================== */

:root {
  --c-ink: #141a21;
  --c-body: #232e3a;
  --c-muted: #68737f;
  --section-y: clamp(88px, 11vw, 160px);
}

/* 兜底隐藏已移除的装饰标签 */
.feature__num,
.steps__no,
.hero__caption,
.brand__text small {
  display: none;
}

/* 类型：更少的层级，更强的对比 */
.h1 {
  font-size: clamp(38px, 4.8vw, 62px);
  line-height: 1.18;
  letter-spacing: -0.012em;
}
.h2 {
  font-size: clamp(28px, 3.4vw, 44px);
  line-height: 1.24;
}
.h3 {
  font-size: clamp(19px, 1.6vw, 22px);
}
.lead {
  font-size: clamp(17px, 1.6vw, 20px);
  line-height: 1.85;
}
body {
  font-size: 16.5px;
}

/* 产品货架：无边框，只有图与字 */
.card {
  background: transparent;
  border-radius: 0;
  overflow: visible;
  transition: none;
}
.card__media {
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--c-bg-soft);
}
.card__body {
  padding: 20px 0 0;
}
.card__foot {
  padding-top: 16px;
}
.card__desc {
  color: var(--c-muted);
}

/* 特征块与应用卡：实色底代替描边卡；无图标顶 */
.feature {
  background: var(--c-bg-soft);
  padding: 28px;
  border-radius: var(--radius);
}
.section--soft .feature {
  background: var(--c-bg);
}
.app-card {
  padding: 0;
  display: block;
}
.app-card__icon {
  display: none;
}

/* 数据条与流程：去掉细线分隔 */
.stats {
  gap: 28px 40px;
}
.stats__item {
  padding: 0;
}
.steps {
  gap: 28px;
}
.steps__item {
  padding: 0;
}

/* 标签：文字分隔，不再描边 */
.tag {
  background: transparent;
  padding: 0;
  border-radius: 0;
  font-size: 13px;
  color: var(--c-muted);
}
.tag + .tag::before {
  content: "·";
  margin: 0 6px;
  color: var(--c-line-strong);
}
.tags {
  gap: 0;
}
.faq__item {
  background: var(--c-bg-soft);
  border-radius: var(--radius);
  margin-bottom: 8px;
  overflow: hidden;
}
.section--soft .faq__item {
  background: var(--c-bg);
}
.faq__item summary {
  padding: 18px 22px;
}
.faq__answer {
  padding: 0 22px 20px;
}
.form-card {
  background: var(--c-bg-soft);
}

/* 首屏：一个主按钮 + 一个文字入口，不做双按钮 */
.hero__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 28px;
}
.hero__actions .text-link {
  align-self: center;
  font-size: 15px;
}

/* 尺寸换算：一个真正有用的「活的东西」，不是动效 */
.size-tool {
  margin-top: clamp(48px, 6vw, 80px);
  padding: clamp(24px, 3vw, 36px);
  background: var(--c-bg-soft);
  border-radius: var(--radius);
}
.size-tool__label {
  font-size: 14px;
  color: var(--c-muted);
}
.size-tool__row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}
.size-chip {
  min-height: 40px;
  padding: 8px 14px;
  border-radius: 8px;
  background: var(--c-bg);
  color: var(--c-ink);
  font: inherit;
  font-size: 14px;
  cursor: pointer;
  transition: background var(--t), color var(--t);
}
.size-chip:hover {
  background: #e9eef4;
}
.size-chip[aria-pressed="true"] {
  background: var(--c-navy);
  color: var(--c-white);
}
.size-tool__out {
  margin-top: 18px;
  font-size: clamp(16px, 1.6vw, 18px);
  color: var(--c-ink);
}
.size-tool__out strong {
  font-weight: 700;
  color: var(--c-navy);
}

/* 窄屏细调 */
@media (max-width: 680px) {
  .stats {
  gap: 20px 0;
}
  .steps {
  gap: 24px;
}
  .size-tool {
  padding: 22px;
}
  .size-chip {
  min-height: 42px;
}
}


/* ==========================================================================
   v4 · 第二轮重做（2026-10-29）：按 tasteskill 的浏览器测量结果收口
   依据：.taste-skill/inspect/report.json
   - 字阶收敛：display / heading / lead / body / small（少而分得开）
   - 首屏焦点：标题更大 + 首屏图约占视口 1/3
   - 小字全部 ≥ 13px
   - 页脚改为「收束式」：大品牌名 + 联系方式，链接退到第二层
   - 动效仍按老板宪法：只留颜色过渡（有意跳过 skill 的 motion 要求）
   ========================================================================== */

:root {
  --section-y: clamp(96px, 12vw, 180px);
  --container: 1240px;
}

/* 字阶 */
body { font-size: 16px; }
.h1 { font-size: clamp(40px, 5.9vw, 86px); line-height: 1.14; letter-spacing: -0.015em; }
.h2 { font-size: clamp(30px, 3.8vw, 48px); line-height: 1.22; }
.h3 { font-size: 20px; line-height: 1.5; }
.lead,
.section-head__lead { font-size: clamp(18px, 1.6vw, 20px); line-height: 1.8; }
.hero__lead { font-size: clamp(18px, 1.7vw, 20px); line-height: 1.8; }
.card__desc { font-size: 16px; line-height: 1.75; }
.stats__num { font-size: clamp(30px, 3.4vw, 44px); }
.stats__label,
.stats-note,
.breadcrumbs,
.topbar,
.tag,
.site-footer__bottom,
.footer-placeholder-note { font-size: 13px; }

/* 首屏：标题与图各占一半，图放大到视口约 1/3 */
.hero { padding-block: clamp(48px, 5vw, 84px); }
.hero__grid {
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
  align-items: center;
  gap: clamp(32px, 5vw, 72px);
}
.hero__title { margin: 0 0 24px; }
.hero__lead { max-width: 34em; }
.hero__visual img { width: 100%; height: auto; }
.hero__actions { margin-top: 32px; }

/* 应用领域：文字清单，不做图标卡 */
.app-card { border: 0; padding: 0; }
.app-card__title { font-size: 20px; }
.app-card__desc { font-size: 16px; line-height: 1.8; }

/* 页脚收束 */
.footer-close {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 48px 64px;
  flex-wrap: wrap;
  padding-block: 0 56px;
}
.footer-close__name {
  font-size: clamp(34px, 4.2vw, 56px);
  font-weight: 700;
  line-height: 1.16;
  letter-spacing: 0.04em;
  color: var(--c-white);
}
.footer-close__line { margin-top: 14px; font-size: 16px; color: #a9bed3; }
.footer-close__contact { display: grid; gap: 8px; font-size: 15px; color: #c3d3e2; }
.footer-close__contact a { color: #ffffff; }
.footer-close__contact p { margin: 0; }

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 36px 32px;
  padding-block: 40px 16px;
}
.footer-links .footer-col h3 { margin-bottom: 14px; }

@media (max-width: 920px) {
  .hero__grid { grid-template-columns: 1fr; }
  .hero__visual { max-width: 560px; }
  .footer-close { padding-bottom: 40px; }
  .footer-links { grid-template-columns: repeat(2, minmax(0, 1fr)); padding-block: 32px 8px; }
}

@media (max-width: 680px) {
  .h1 { font-size: clamp(38px, 11vw, 48px); }
  .hero__visual { max-width: none; }
  .footer-close__contact { font-size: 15px; }
  .footer-links { grid-template-columns: 1fr; gap: 28px; }
}


/* ==========================================================================
   v5 · 字阶收敛（display / heading / lead / body / small）
   目标：消除十余种字号，正文 ≥16px，小字 ≥13px
   ========================================================================== */
.card__title,
.feature__title,
.steps__title { font-size: 20px; }
.split__text { font-size: 16px; line-height: 1.85; }
.hero__point { font-size: 16px; }
.nav__link { font-size: 16px; }
.btn { font-size: 16px; }
.form-field label { font-size: 15px; }
.form-field input,
.form-field select,
.form-field textarea { font-size: 16px; }
.prose p,
.prose ul li,
.prose ol li { font-size: 16px; }
.stats__num { font-size: clamp(30px, 3.2vw, 40px); }
.cta-band__title { font-size: clamp(26px, 2.8vw, 40px); }
.footer-close__name { font-size: clamp(34px, 3.6vw, 48px); }
.site-footer { font-size: 16px; }
.footer-links .footer-col h3,
.footer-links .footer-col li,
.footer-close__contact { font-size: 16px; }
.stats-note,
.tag,
.info-item__label,
.form-field .hint,
.form-note,
.footer-placeholder-note,
.site-footer__bottom { font-size: 13px; }
.hero__caption { display: none; }


/* ==========================================================================
   v6 · 字阶最终收口：正文/描述 16px，标签 13px，标题 20px，display 85px
   ========================================================================== */
.h3 { font-size: 20px; }
.prose h3 { font-size: 20px; }
.checklist li { font-size: 16px; }
.faq__answer { font-size: 16px; }
.cta-band__text { font-size: 16px; }
.hero__actions .text-link { font-size: 16px; }
.prose blockquote { font-size: 16px; }
.feature__desc,
.app-card__desc,
.steps__desc { font-size: 16px; }
.text-link { font-size: 16px; }
.btn--sm { font-size: 16px; }
.size-chip { font-size: 16px; }
.form-status { font-size: 13px; }
.notice { font-size: 13px; }
.size-tool__label { font-size: 13px; }
.spec-table caption { font-size: 13px; }

/* ==========================================================================
   v7 · 正文用满墨（tasteskill grey-body 规则）：说明文字不再整体发灰
   ========================================================================== */
.lead,
.hero__lead,
.section-head__lead,
.page-hero__lead,
.split__text,
.card__desc,
.feature__desc,
.app-card__desc,
.steps__desc,
.faq__answer,
.prose p,
.prose ul li,
.prose ol li,
.prose blockquote,
.info-item__value { color: var(--c-body); }




/* ==========================================================================
   v9 · Apple 简洁风格（2026-10-29，老板指定）
   语言：冷灰 #f5f5f7 底 + 白色统一面板 + 发丝线 + 负字距标题 + 双层柔和阴影
        + 胶囊按钮 + 浅色页脚 + 导航玻璃（仅导航层叠处）
   保留：深蓝作为品牌强调色；B2B 内容结构；无滚动动画
   ========================================================================== */

:root {
  --bg: #f5f5f7;
  --surface: #ffffff;
  --hover: #fbfbfd;
  --ink: #1d1d1f;
  --body: #424245;
  --text-2: #6e6e73;
  --text-3: #86868b;
  --faint: #d2d2d7;
  --hairline: rgba(0, 0, 0, 0.07);
  --accent: #123a5f;
  --accent-dark: #0b2a47;
  --accent-link: #0b4f8a;
  --radius-thumb: 12px;
  --radius-card: 18px;
  --radius-panel: 22px;
  --radius-hero: 26px;
  --sh-card: 0 1px 2px rgba(0, 0, 0, 0.04), 0 8px 24px rgba(0, 0, 0, 0.05);
  --sh-panel: 0 1px 3px rgba(0, 0, 0, 0.05), 0 14px 40px rgba(0, 0, 0, 0.05);
  --sh-lift: 0 12px 32px rgba(0, 0, 0, 0.1);
  --ease: cubic-bezier(0.25, 1, 0.5, 1);
}

/* ---------- 基础 ---------- */
html { -webkit-text-size-adjust: 100%; }
body {
  background: var(--bg);
  color: var(--body);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue",
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: 1.6;
}
a { color: var(--accent-link); }
a:hover { color: var(--accent); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

.h1 {
  color: var(--ink);
  font-size: clamp(38px, 5.4vw, 64px);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.03em;
}
.h2 {
  color: var(--ink);
  font-size: clamp(26px, 3.6vw, 42px);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}
.h3 { color: var(--ink); font-size: 20px; font-weight: 600; line-height: 1.45; letter-spacing: -0.01em; }
.lead,
.section-head__lead,
.page-hero__lead,
.hero__lead {
  color: var(--text-2);
  font-size: clamp(17px, 1.6vw, 20px);
  line-height: 1.7;
}
.section-head__lead, .page-hero__lead { font-size: clamp(16px, 1.5vw, 18px); }
.stats-note, .footer-placeholder-note, .site-footer__bottom, .tag,
.breadcrumbs, .topbar, .info-item__label, .form-field .hint, .form-note { color: var(--text-3); font-size: 13px; }
.stats__label { color: var(--text-3); font-size: 13px; }

/* ---------- 顶栏 + 导航（玻璃仅用于导航） ---------- */
.topbar { background: var(--bg); color: var(--text-3); }
.topbar__contact a { color: var(--text-2); }
.topbar__contact a:hover { color: var(--ink); }
.site-header {
  background: rgba(245, 245, 247, 0.72);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid transparent; /* taste-skill-ignore */
  transition: border-color 200ms var(--ease), box-shadow 200ms var(--ease);
}
.site-header.is-scrolled {
  border-bottom-color: var(--hairline); /* taste-skill-ignore */
  box-shadow: 0 1px 12px rgba(0, 0, 0, 0.04);
}
.brand__text strong { color: var(--ink); font-size: 19px; font-weight: 700; letter-spacing: 0.02em; }
.brand__mark { width: 34px; height: 34px; }
.nav__link { color: var(--text-2); font-size: 15px; padding: 10px 12px; }
.nav__link:hover { color: var(--ink); }
.nav__link.is-active { color: var(--ink); font-weight: 600; border-bottom-color: transparent; }
.nav-toggle { background: rgba(0, 0, 0, 0.04); border: 0; border-radius: 999px; }

/* ---------- 按钮：胶囊 ---------- */
.btn {
  border: 0;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 500;
  min-height: 44px;
  padding: 11px 24px;
  transition: background 200ms var(--ease), color 200ms var(--ease), box-shadow 200ms var(--ease), transform 200ms var(--ease);
}
.btn--primary { background: var(--accent); color: #fff; }
.btn--primary:hover, .btn--primary:focus-visible { background: var(--accent-dark); color: #fff; box-shadow: 0 8px 24px rgba(18, 58, 95, 0.22); }
.btn--ghost { background: var(--surface); color: var(--ink); box-shadow: var(--sh-card); }
.btn--ghost:hover, .btn--ghost:focus-visible { background: var(--hover); color: var(--ink); }
.btn--light { background: #fff; color: var(--ink); }
.btn--light:hover, .btn--light:focus-visible { background: #f0f0f2; color: var(--ink); }
.btn--outline-light { background: transparent; color: #fff; border: 1px solid rgba(255, 255, 255, 0.35); }
.btn--outline-light:hover, .btn--outline-light:focus-visible { background: rgba(255, 255, 255, 0.12); color: #fff; }
.text-link { color: var(--accent-link); font-weight: 500; }
.text-link:hover { color: var(--accent); }

/* ---------- 布局 ---------- */
.section { padding-block: clamp(56px, 7vw, 92px); }
.section--soft { background: transparent; }
.section--soft > .container {
  background: var(--surface);
  border-radius: var(--radius-hero);
  box-shadow: var(--sh-panel);
  padding: clamp(36px, 4.5vw, 56px) clamp(24px, 4vw, 48px);
}
.section--line { border-top: 0; }
.page-hero { background: transparent; border-bottom: 0; padding-block: clamp(40px, 5vw, 64px) clamp(24px, 3vw, 40px); }
.section-head { margin-bottom: clamp(28px, 3.5vw, 44px); }

/* 正文内容的白面板 */
.prose {
  max-width: 720px;
  background: var(--surface);
  border-radius: var(--radius-panel);
  box-shadow: var(--sh-card);
  padding: clamp(28px, 3.4vw, 44px) clamp(24px, 3.2vw, 44px);
}
.section--soft .prose { background: transparent; box-shadow: none; padding: 0; max-width: 720px; }
.prose h2 { color: var(--ink); letter-spacing: -0.01em; }
.prose h3 { color: var(--ink); }
.prose p, .prose ul li, .prose ol li { color: var(--body); font-size: 16px; line-height: 1.85; }

/* ---------- Hero ---------- */
.hero { padding-block: clamp(44px, 5vw, 72px); border-bottom: 0; }
.hero__title { margin: 0 0 20px; }
.hero__lead { color: var(--text-2); }
.hero__visual {
  background: var(--surface);
  border-radius: var(--radius-hero);
  box-shadow: var(--sh-panel);
  padding: 18px;
}
.hero__visual img { border: 0; border-radius: 18px; }
.hero__caption { color: var(--text-3); font-size: 12px; }
.hero__points { border-top: 0; gap: 10px 22px; }
.hero__point { color: var(--text-2); font-size: 14px; }

/* ---------- 数据条：一块白面板 + 发丝分栏 ---------- */
.stats {
  background: var(--surface);
  border-radius: var(--radius-panel);
  box-shadow: var(--sh-card);
  padding: clamp(24px, 3vw, 34px) clamp(22px, 3vw, 34px);
  gap: 0;
  border-top: 0;
}
.stats__item { padding: 0 28px; border: 0; }
.stats__item:first-child { padding-left: 0; }
.stats__item:last-child { padding-right: 0; }
.stats__item + .stats__item { border-left: 1px solid var(--hairline); /* taste-skill-ignore */ }
.stats__num { color: var(--ink); font-size: clamp(32px, 3.4vw, 44px); font-weight: 700; letter-spacing: -0.02em; font-variant-numeric: tabular-nums; }
.stats__num small { color: var(--text-3); font-weight: 500; }
.stats__label { color: var(--text-3); }

/* ---------- 卡片：白面 + 双层柔和阴影 + 轻悬浮 ---------- */
.card {
  background: var(--surface);
  border: 0;
  border-radius: var(--radius-card);
  box-shadow: var(--sh-card);
  overflow: hidden;
  transition: transform 260ms var(--ease), box-shadow 260ms var(--ease);
}
.card:hover { transform: translateY(-3px); box-shadow: var(--sh-lift); }
.card__media { background: var(--bg); border-bottom: 0; }
.card__body { padding: 20px 22px 22px; }
.card__title { color: var(--ink); font-size: 19px; font-weight: 600; letter-spacing: -0.01em; }
.card__desc { color: var(--text-2); font-size: 15px; line-height: 1.65; }
.card__foot { padding-top: 14px; }
.tag { background: var(--bg); border: 0; border-radius: 999px; padding: 3px 10px; color: var(--text-2); }
.tag + .tag::before { display: none; }
.tags { gap: 6px; }

/* ---------- 特征卡 / 应用卡 ---------- */
.feature {
  background: var(--surface);
  border-radius: var(--radius-card);
  box-shadow: var(--sh-card);
  border: 0;
  padding: 26px 26px 24px;
}
.feature__title { color: var(--ink); font-size: 19px; font-weight: 600; letter-spacing: -0.01em; }
.feature__desc { color: var(--text-2); font-size: 15px; line-height: 1.7; }
.section--soft .feature { background: var(--bg); box-shadow: none; }
.app-card {
  background: var(--surface);
  border-radius: var(--radius-card);
  box-shadow: var(--sh-card);
  border: 0;
  padding: 24px;
}
.section--soft .app-card { background: var(--bg); box-shadow: none; }
.app-card__title { color: var(--ink); font-size: 19px; font-weight: 600; letter-spacing: -0.01em; }
.app-card__desc { color: var(--text-2); font-size: 15px; line-height: 1.7; }

/* ---------- 流程：一块白面板 ---------- */
.steps {
  background: var(--surface);
  border-radius: var(--radius-panel);
  box-shadow: var(--sh-card);
  padding: 8px 0;
  gap: 0;
  border-top: 0;
}
.steps__item { padding: 24px 28px; border: 0; }
.steps__item + .steps__item { border-left: 1px solid var(--hairline); /* taste-skill-ignore */ }
.steps__title { color: var(--ink); font-size: 18px; font-weight: 600; }
.steps__desc { color: var(--text-2); font-size: 15px; line-height: 1.7; }

/* ---------- 统一面板列表 ---------- */
.panel {
  background: var(--surface);
  border-radius: var(--radius-panel);
  box-shadow: var(--sh-card);
  padding: 6px 26px;
}
.panel__row {
  display: grid;
  grid-template-columns: 132px minmax(0, 1fr) auto;
  gap: 22px;
  align-items: center;
  padding: 16px 0;
  border-top: 1px solid var(--hairline); /* taste-skill-ignore */
}
.panel__row:first-child { border-top: 0; }
.panel__thumb { display: block; width: 132px; height: 99px; border-radius: var(--radius-thumb); overflow: hidden; background: var(--bg); }
.panel__thumb img { width: 100%; height: 100%; object-fit: cover; }
.panel__title { display: block; color: var(--ink); font-size: 18px; font-weight: 600; line-height: 1.4; letter-spacing: -0.01em; }
.panel__desc { display: block; margin-top: 4px; color: var(--text-2); font-size: 15px; line-height: 1.65; }
.panel__arrow { color: var(--faint); font-size: 18px; }
.panel__row:hover .panel__title { color: var(--accent); }
.panel__row:hover .panel__arrow { color: var(--accent); }

/* ---------- 规格表：白面板 + 发丝线 ---------- */
.table-wrap { background: var(--surface); border: 0; border-radius: var(--radius-panel); box-shadow: var(--sh-card); padding: 4px 26px; }
.spec-table { border-collapse: separate; border-spacing: 0; }
.spec-table caption { background: transparent; border-bottom: 1px solid var(--hairline); /* taste-skill-ignore */ padding: 16px 0; color: var(--text-3); font-size: 13px; }
.spec-table thead th { background: transparent; border: 0; padding: 12px 12px 12px 0; color: var(--text-3); font-size: 13px; font-weight: 500; letter-spacing: 0; text-transform: none; }
.spec-table tbody th, .spec-table tbody td { background: transparent; border: 0; border-top: 1px solid var(--hairline); /* taste-skill-ignore */ padding: 14px 12px 14px 0; font-size: 15px; color: var(--body); }
.spec-table tbody th { color: var(--ink); font-weight: 600; }
.spec-table tbody tr:first-child th, .spec-table tbody tr:first-child td { border-top: 1px solid var(--hairline); /* taste-skill-ignore */ }
.spec-table tbody tr:last-child th, .spec-table tbody tr:last-child td { border-bottom: 0; }

/* ---------- FAQ：白面板 + 发丝线 ---------- */
.faq { background: var(--surface); border-radius: var(--radius-panel); box-shadow: var(--sh-card); padding: 4px 26px; border-top: 0; }
.faq__item { background: transparent; border-radius: 0; margin: 0; border: 0; border-top: 1px solid var(--hairline); /* taste-skill-ignore */ }
.faq__item:first-child { border-top: 0; }
.faq__item summary { color: var(--ink); font-size: 17px; font-weight: 600; padding: 18px 0; letter-spacing: -0.01em; }
.faq__answer { color: var(--text-2); padding: 0 0 20px; font-size: 15px; line-height: 1.75; }
.section--soft .faq__item { background: transparent; }
.section--soft .faq { box-shadow: none; background: var(--bg); }

/* ---------- CTA：近黑内嵌面板 ---------- */
.cta-band { background: transparent; padding-block: clamp(40px, 5vw, 64px); }
.cta-band > .container {
  background: #1d1d1f;
  border-radius: var(--radius-hero);
  padding: clamp(36px, 4.5vw, 56px) clamp(24px, 4vw, 48px);
}

/* ---------- 页脚：浅色收束 ---------- */
.site-footer {
  background: var(--bg);
  color: var(--text-2);
  border-top: 1px solid var(--hairline); /* taste-skill-ignore */
  padding-top: clamp(40px, 5vw, 64px);
}
.site-footer a { color: var(--text-2); }
.site-footer a:hover { color: var(--ink); }
.footer-close__name { color: var(--ink); font-size: clamp(32px, 3.6vw, 44px); font-weight: 700; letter-spacing: -0.02em; }
.footer-close__line { color: var(--text-3); font-size: 15px; }
.footer-close__contact { color: var(--text-2); font-size: 15px; }
.footer-close__contact a { color: var(--ink); }
.footer-links { border-top: 0; }
.footer-links .footer-col h3 { color: var(--text-3); font-size: 13px; font-weight: 600; letter-spacing: 0; text-transform: none; }
.footer-links .footer-col li { font-size: 14px; }
.footer-placeholder-note { border: 0; color: var(--text-3); padding-top: 20px; }
.site-footer__bottom { border-top: 1px solid var(--hairline); /* taste-skill-ignore */ color: var(--text-3); }

/* ---------- 表单 / 联系 ---------- */
.form-card { background: var(--surface); border: 0; border-radius: var(--radius-panel); box-shadow: var(--sh-card); }
.form-field input, .form-field select, .form-field textarea { border: 1px solid rgba(0, 0, 0, 0.12); border-radius: 10px; background: var(--bg); }
.form-field input:focus, .form-field select:focus, .form-field textarea:focus { border-color: var(--accent); background: #fff; }
.info-item__label { color: var(--text-3); }
.info-item__value { color: var(--ink); }
.notice { background: var(--bg); border-left: 0; border-radius: var(--radius-card); padding: 18px 22px; color: var(--text-2); }
.checklist li { color: var(--body); }

/* ---------- 尺寸工具 ---------- */
.size-tool { background: var(--surface); border-radius: var(--radius-panel); box-shadow: var(--sh-card); }
.size-chip { background: var(--bg); border-radius: 999px; }
.size-chip:hover { background: #ececf0; }
.size-chip[aria-pressed="true"] { background: var(--accent); color: #fff; }
.size-tool__out { color: var(--text-2); }
.size-tool__out strong { color: var(--ink); }

/* ---------- 响应式 ---------- */
@media (max-width: 920px) {
  .site-header { background: rgba(245, 245, 247, 0.94); }
  .section--soft > .container { border-radius: var(--radius-panel); padding: 28px 20px; }
  .stats__item + .stats__item { border-left: 0; border-top: 1px solid var(--hairline); /* taste-skill-ignore */ }
  .stats__item { padding: 16px 0; }
  .stats__item:first-child { padding-top: 0; }
  .steps__item { border-left: 0; border-top: 1px solid var(--hairline); /* taste-skill-ignore */ padding: 20px 0; }
  .steps__item:first-child { border-top: 0; padding-top: 0; }
  .steps { padding: 8px 22px; }
}
@media (max-width: 680px) {
  .h1 { font-size: clamp(34px, 9.6vw, 44px); }
  .section { padding-block: 44px; }
  .section--soft > .container { padding: 24px 18px; border-radius: var(--radius-panel); }
  .hero { padding-block: 32px 40px; }
  .hero__visual { padding: 12px; border-radius: var(--radius-panel); }
  .stats { padding: 20px 18px; }
  .panel { padding: 4px 16px; }
  .panel__row { grid-template-columns: 96px minmax(0, 1fr) auto; gap: 14px; }
  .panel__thumb { width: 96px; height: 72px; }
  .panel__desc { display: none; }
  .table-wrap, .faq { padding: 4px 16px; }
  .cta-band > .container { border-radius: var(--radius-panel); padding: 28px 20px; }
  .footer-close { padding-bottom: 32px; }
}

/* === v10 gm-v2-redesign === */
.img-ph {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  aspect-ratio: 4 / 3;
  margin: 0;
  border-radius: var(--radius-card, 18px);
  background: #eef0f3;
  border: 1px solid rgba(0,0,0,.06);
  color: var(--text-3, #6e6e73);
  text-align: center;
  padding: 20px;
  box-sizing: border-box;
}
.img-ph__label {
  font-size: 15px;
  font-weight: 600;
  color: var(--ink, #1d1d1f);
  letter-spacing: -0.01em;
  max-width: 16em;
}
.img-ph__hint {
  font-size: 12px;
  color: var(--text-3, #6e6e73);
}
.card__media .img-ph,
.panel__thumb .img-ph,
.split__media .img-ph,
.hero__visual .img-ph {
  height: 100%;
  min-height: 120px;
}
.panel__thumb .img-ph {
  width: 100%;
  height: 100%;
  aspect-ratio: auto;
  border-radius: var(--radius-thumb, 12px);
  padding: 8px;
}
.panel__thumb .img-ph__label { font-size: 12px; }
.panel__thumb .img-ph__hint { display: none; }
.shelf-grid .card__desc {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.muted-inline {
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-2, #424245);
}
.muted-inline a { color: var(--accent, #123a5f); }
.tag {
  display: inline-block;
  margin-left: 8px;
  padding: 2px 8px;
  font-size: 12px;
  font-weight: 600;
  color: var(--accent, #123a5f);
  background: rgba(18,58,95,.08);
  border-radius: 6px;
  vertical-align: middle;
}

/* ==========================================================================
   v11 · structure-simplify (2026-10-30)
   MUJI / Apple shelf：留白、小圆角、轻阴影、字少字大；去掉顶栏双层 chrome
   ========================================================================== */

:root {
  --radius: 8px;
  --radius-thumb: 6px;
  --radius-card: 8px;
  --radius-panel: 8px;
  --radius-hero: 8px;
  --section-y: clamp(80px, 10vw, 140px);
  --sh-card: none;
  --sh-panel: none;
  --sh-lift: none;
}

/* 单层 chrome：顶栏已从 HTML 移除；header 不透明、无玻璃 */
.topbar { display: none !important; }
.site-header {
  background: #ffffff;
  -webkit-backdrop-filter: none;
  backdrop-filter: none;
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
  box-shadow: none;
}
.site-header.is-scrolled {
  border-bottom-color: rgba(0, 0, 0, 0.08);
  box-shadow: none;
}
.site-header__inner { min-height: 68px; }
.header-phone {
  display: inline-flex;
  align-items: center;
  font-size: 14px;
  font-weight: 500;
  color: var(--ink, #1d1d1f);
  white-space: nowrap;
  margin-left: 4px;
}
.header-phone:hover { color: var(--accent, #123a5f); }

/* 按钮：小圆角，非胶囊 */
.btn {
  border-radius: 8px;
  box-shadow: none;
  transform: none !important;
}
.btn--primary:hover,
.btn--primary:focus-visible { box-shadow: none; }
.btn--ghost { box-shadow: none; }

/* Hero：更大字、更少辅助 */
.hero { padding-block: clamp(56px, 8vw, 112px) clamp(48px, 6vw, 88px); }
.hero__title { margin: 0 0 20px; }
.hero__lead {
  max-width: 34em;
  font-size: clamp(17px, 1.5vw, 19px);
  line-height: 1.65;
}
.hero__actions { margin-top: 28px; }
.hero__quiet {
  margin-top: 28px;
  font-size: 14px;
  color: var(--text-3, #86868b);
  letter-spacing: 0.02em;
}
.hero__visual {
  background: transparent;
  box-shadow: none;
  padding: 0;
  border-radius: 8px;
}
.hero__visual img {
  border-radius: 8px;
  box-shadow: none;
}

/* 产品货架 */
.shelf {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 20px;
}
.shelf-card {
  display: flex;
  flex-direction: column;
  background: #ffffff;
  border: 1px solid rgba(0, 0, 0, 0.06);
  border-radius: 8px;
  overflow: hidden;
  color: inherit;
  text-decoration: none;
  transition: border-color 160ms ease;
}
.shelf-card:hover {
  color: inherit;
  border-color: rgba(18, 58, 95, 0.28);
}
.shelf-card__media {
  display: block;
  background: #f5f5f7;
  aspect-ratio: 4 / 3;
  overflow: hidden;
}
.shelf-card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.shelf-card__body {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 16px 18px;
}
.shelf-card__title {
  font-size: 16px;
  font-weight: 600;
  color: var(--ink, #1d1d1f);
  letter-spacing: -0.01em;
  line-height: 1.4;
}
.shelf-card__sub {
  font-size: 13px;
  color: var(--text-3, #86868b);
}
.shelf-card__sub a {
  color: var(--accent, #123a5f);
  font-weight: 500;
}
.shelf-card__sub a:hover { text-decoration: underline; text-underline-offset: 2px; }

/* 工厂一句 */
.factory-strip {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: clamp(28px, 5vw, 64px);
  align-items: center;
}
.factory-strip__title { margin: 0 0 14px; }
.factory-strip__text {
  margin: 0 0 20px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-2, #6e6e73);
  max-width: 36em;
}
.factory-strip__media img {
  width: 100%;
  height: auto;
  border-radius: 8px;
}

/* section soft：白底货架感，去掉厚重白面板阴影 */
.section { padding-block: var(--section-y); }
.section--soft { background: #f5f5f7; }
.section--soft > .container {
  background: transparent;
  border-radius: 0;
  box-shadow: none;
  padding: 0;
}

/* 卡片：等宽货架，无悬浮抬升 */
.card {
  border: 1px solid rgba(0, 0, 0, 0.06);
  border-radius: 8px;
  box-shadow: none;
  transition: border-color 160ms ease;
}
.card:hover {
  transform: none;
  box-shadow: none;
  border-color: rgba(18, 58, 95, 0.28);
}
.card__body { padding: 16px 16px 18px; }
.card__title { font-size: 17px; }
.shelf-grid .card__desc { display: none; }
.shelf-grid .card__foot { display: none; }
.shelf-grid .card__body { padding: 14px 16px 16px; }

/* CTA：安静色带，小圆角 */
.cta-band { background: transparent; padding-block: clamp(48px, 6vw, 88px); }
.cta-band > .container,
.cta-band .cta-band__grid {
  /* when grid is direct child of container in simplified home */
}
.cta-band > .container {
  background: #1d1d1f;
  border-radius: 8px;
  padding: clamp(36px, 4.5vw, 56px) clamp(24px, 4vw, 48px);
}
/* index uses cta-band__grid as direct child of container — wrap look */
.cta-band:has(> .container > .cta-band__grid) > .container,
.cta-band > .container:has(> .cta-band__grid) {
  background: #1d1d1f;
  border-radius: 8px;
  padding: clamp(36px, 4.5vw, 56px) clamp(24px, 4vw, 48px);
}
.cta-band__title { font-size: clamp(22px, 2.4vw, 30px); }

/* 页脚：精简 */
.footer-slim {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 16px 32px;
  padding: 28px 0 8px;
  border-top: 1px solid rgba(0, 0, 0, 0.06);
}
.footer-slim__products,
.footer-slim__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin: 0;
  font-size: 14px;
}
.footer-slim a { color: var(--text-2, #6e6e73); }
.footer-slim a:hover { color: var(--ink, #1d1d1f); }
.footer-links { display: none !important; } /* 旧三列链接农场关闭；各页已换 footer-slim */
.footer-close { padding-bottom: 28px; }
.footer-close__name { font-size: clamp(28px, 3vw, 36px); }
.footer-close__contact p:nth-child(3) { /* keep address; wechat removed in new footer */ }

/* panel 列表（内页仍可用）收紧 */
.panel {
  border-radius: 8px;
  box-shadow: none;
  border: 1px solid rgba(0, 0, 0, 0.06);
}
.prose, .form-card, .table-wrap, .faq, .feature, .app-card, .steps {
  border-radius: 8px;
  box-shadow: none;
}
.feature, .app-card {
  border: 1px solid rgba(0, 0, 0, 0.06);
}

@media (max-width: 1100px) {
  .shelf { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
@media (max-width: 920px) {
  .header-phone { display: none; }
  .factory-strip { grid-template-columns: 1fr; }
  .factory-strip__media { order: -1; }
  .site-header { background: #ffffff; }
}
@media (max-width: 680px) {
  .shelf { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
  .shelf-card__body { padding: 12px; }
  .shelf-card__title { font-size: 14px; }
  .hero { padding-block: 36px 48px; }
  .section { padding-block: 56px; }
  .footer-slim { flex-direction: column; gap: 12px; }
  .cta-band > .container { border-radius: 8px; padding: 28px 20px; }
}

/* shelf-card as container (plastic sublinks without nested anchors) */
.shelf-card__hit {
  display: flex;
  flex-direction: column;
  color: inherit;
  text-decoration: none;
  flex: 1;
}
.shelf-card__hit:hover { color: inherit; }
.shelf-card > .shelf-card__sub {
  margin: 0;
  padding: 0 16px 16px;
  font-size: 13px;
  color: var(--text-3, #86868b);
}
.shelf-card > .shelf-card__sub a { color: var(--accent, #123a5f); font-weight: 500; }

/* v11 polish: kill leftover pill chrome */
.nav-toggle { border-radius: 8px !important; }

/* icp-footer-center 2026-11-10 */
.site-footer__bottom {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 8px;
}