:root {
  --p1-ink: #172d38;
  --p1-muted: #536674;
  --p1-brand: #164d64;
  --p1-accent: #a96e3a;
  --p1-line: #d9e1e3;
  --p1-bg: #f7f8f6;
  --p1-white: #fff;
  --p1-radius: 16px;
  --p1-width: 1160px;
  --p1-space: clamp(24px,5vw,64px);
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--p1-bg);
  color: var(--p1-ink);
  font-family: -apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;
  overflow-x: hidden;
}

*,*::before,*::after {
  box-sizing: border-box;
}

a {
  color: var(--p1-brand);
}

a:focus-visible,summary:focus-visible {
  outline: 3px solid var(--p1-accent);
  outline-offset: 4px;
}

img {
  max-width: 100%;
  height: auto;
}

.p1-header {
  background: #fff;
  border-bottom: 1px solid var(--p1-line);
  position: sticky;
  top: 0;
  z-index: 20;
}

.p1-header-inner {
  max-width: var(--p1-width);
  min-height: 76px;
  margin: auto;
  padding: 12px 24px;
  display: flex;
  align-items: center;
  gap: 28px;
}

.p1-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 180px;
  color: var(--p1-ink);
  text-decoration: none;
}

.p1-brand img {
  width: 42px;
  height: 42px;
  object-fit: contain;
}

.p1-brand strong,.p1-brand small {
  display: block;
}

.p1-brand strong {
  font-size: 17px;
  letter-spacing: .02em;
}

.p1-brand small {
  font-size: 11px;
  color: var(--p1-muted);
}

.p1-desktop-nav {
  display: flex;
  align-items: center;
  gap: clamp(12px,1.6vw,24px);
  margin-left: auto;
}

.p1-desktop-nav a,.p1-mobile-nav a {
  text-decoration: none;
  font-size: 14px;
  color: var(--p1-ink);
  white-space: nowrap;
}

.p1-desktop-nav a:hover,.p1-desktop-nav a[aria-current="page"] {
  color: var(--p1-brand);
  font-weight: 700;
}

.p1-header-cta {
  background: var(--p1-brand);
  color: white;
  text-decoration: none;
  border-radius: 8px;
  padding: 10px 17px;
  white-space: nowrap;
  font-size: 14px;
}

.p1-desktop-nav .p1-language-link {
  margin-left: 2px;
  padding-left: 14px;
  border-left: 1px solid var(--p1-line);
  color: var(--p1-muted);
  font-size: 13px;
}

.p1-desktop-nav .p1-language-link:hover {
  color: var(--p1-brand);
}

.p1-mobile-nav {
  display: none;
}

.p1-main {
  max-width: var(--p1-width);
  margin: auto;
  padding: 0 24px 72px;
}

.p1-breadcrumbs {
  font-size: 13px;
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
  padding-top: 24px;
  color: var(--p1-muted);
}

.p1-breadcrumbs a {
  color: var(--p1-muted);
}

.p1-hero {
  padding: clamp(54px,8vw,108px) var(--p1-space);
  margin: 28px 0 0;
  background: #e9f0f0;
  border-radius: var(--p1-radius);
  border: 1px solid var(--p1-line);
}

.p1-home-hero {
  display: flex;
  flex-direction: column;
  justify-content: center;
  width: 100vw;
  min-height: calc(100svh - 76px);
  margin: 0 calc(50% - 50vw);
  padding: 54px max(24px,calc((100vw - var(--p1-width))/2 + 24px));
  border: 0;
  border-radius: 0;
  background-color: #f2f4f0;
  background-image: linear-gradient(90deg,rgba(247,249,247,.98) 0%,rgba(247,249,247,.95) 33%,rgba(247,249,247,.63) 47%,rgba(247,249,247,0) 65%),url("/assets/images/home-hero-zen-echo.webp");
  background-size: cover;
  background-position: center;
}

.p1-hero.p1-home-hero h1 {
  max-width: 700px;
  font-size: clamp(36px,4vw,48px);
  line-height: 1.35;
}

.p1-home-hero .p1-lead {
  max-width: 575px;
  font-size: clamp(16px,1.5vw,18px);
  line-height: 1.85;
}

.p1-eyebrow {
  font-size: 15px;
  letter-spacing: .12em;
  color: var(--p1-brand);
  font-weight: 700;
  margin: 0 0 16px;
}

.p1-hero h1 {
  max-width: 860px;
  font-size: clamp(36px,5vw,62px);
  line-height: 1.5;
  letter-spacing: -.025em;
  margin: 0 0 24px;
  font-weight: 650;
}

.p1-lead {
  max-width: 760px;
  font-size: clamp(17px,1.8vw,21px);
  line-height: 2.1;
  color: #36505d;
  margin: 0;
}

@media (max-width:900px) {
  .p1-home-hero {
    padding: 54px 40px;
    background-image: linear-gradient(90deg,rgba(247,249,247,.97) 0%,rgba(247,249,247,.9) 52%,rgba(247,249,247,.5) 100%),url("/assets/images/home-hero-zen-echo.webp");
    background-position: 68% center;
  }
}

.p1-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 28px;
}

.p1-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  background: var(--p1-brand);
  border: 1px solid var(--p1-brand);
  border-radius: 8px;
  padding: 10px 20px;
  color: white;
  text-decoration: none;
  font-weight: 650;
  font-size: 15px;
}

.p1-button:hover,.p1-header-cta:hover {
  background: #103d51;
}

.p1-button-outline {
  background: transparent;
  color: var(--p1-brand);
}

.p1-button-outline:hover {
  background: #dbe8e9;
}

.p1-button-light {
  background: #fff;
  color: var(--p1-brand);
  border-color: #fff;
}

.p1-button-light:hover {
  background: #e9f0f0;
}

.p1-section {
  padding: clamp(48px,6vw,82px) 8px;
  border-bottom: 1px solid var(--p1-line);
}

.p1-section-head {
  max-width: 1024px;
  margin-bottom: 27px;
}

.p1-section h2,.p1-cta h2 {
  font-size: clamp(26px,3vw,38px);
  line-height: 1.5;
  margin: 0;
  color: var(--p1-ink);
}

.p1-copy,.p1-section>p {
  max-width: 1024px;
  font-size: 17px;
  line-height: 1.9;
  color: #3f5360;
}

.p1-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit,minmax(min(100%,250px),1fr));
  gap: 18px;
}

.p1-card {
  min-width: 0;
  background: white;
  border: 1px solid var(--p1-line);
  border-radius: var(--p1-radius);
  padding: 25px;
  display: flex;
  flex-direction: column;
}

.p1-card h3 {
  font-size: 20px;
  line-height: 1.35;
  margin: 0 0 12px;
}

.p1-card p {
  color: var(--p1-muted);
  line-height: 1.75;
  margin: 0 0 18px;
}

.p1-card a {
  margin-top: auto;
  font-weight: 650;
}

.p1-method-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--p1-line);
  border-radius: var(--p1-radius);
  background: #fff;
}

.p1-method-table {
  width: 100%;
  min-width: 690px;
  border-collapse: collapse;
  text-align: left;
  line-height: 1.7;
}

.p1-method-table th,.p1-method-table td {
  padding: 18px 20px;
  vertical-align: top;
  border-bottom: 1px solid var(--p1-line);
}

.p1-method-table thead {
  background: #e9f0f0;
  color: var(--p1-ink);
}

.p1-method-table thead th {
  font-weight: 700;
}

.p1-method-table tbody th {
  width: 17%;
  color: var(--p1-ink);
  font-weight: 700;
}

.p1-method-table tbody td {
  width: 41.5%;
  color: #3f5360;
}

.p1-method-table tbody tr:last-child th,.p1-method-table tbody tr:last-child td {
  border-bottom: 0;
}

.p1-method-source {
  margin: 16px 0 0;
  font-size: 14px !important;
}

.p1-comparison {
  --compare-gold: #b2824f;
}

.p1-comparison .p1-section-head {
  max-width: 900px;
  margin-bottom: 34px;
}

.p1-comparison .p1-eyebrow {
  color: var(--p1-brand);
}

.p1-comparison-intro {
  margin: 20px 0 12px;
  color: var(--p1-ink);
  font-size: 17px;
  line-height: 1.85;
}

.p1-comparison-source {
  margin: 0;
  color: var(--p1-muted);
  font-size: 14px;
  line-height: 1.7;
}

.p1-comparison-questions {
  display: grid;
  gap: 16px;
}

.p1-comparison-question {
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--p1-line);
  border-radius: 16px;
}

.p1-comparison-question[open] {
  border-color: #b7cbd0;
  box-shadow: 0 12px 32px #173d4810;
}

.p1-comparison-question summary {
  display: flex;
  align-items: center;
  gap: 22px;
  padding: 23px 28px;
  cursor: pointer;
  list-style: none;
}

.p1-comparison-question summary::-webkit-details-marker {
  display: none;
}

.p1-comparison-number {
  flex: none;
  color: var(--compare-gold);
  font-size: 26px;
  font-weight: 750;
  font-variant-numeric: tabular-nums;
}

.p1-comparison-question-label {
  display: grid;
  gap: 5px;
  min-width: 0;
}

.p1-comparison-question-label small {
  color: var(--p1-muted);
  font-size: 12px;
  letter-spacing: .12em;
}

.p1-comparison-question-label strong {
  font-size: clamp(19px,2.1vw,25px);
  line-height: 1.4;
}

.p1-comparison-toggle {
  width: 12px;
  height: 12px;
  margin-left: auto;
  border-right: 2px solid var(--p1-brand);
  border-bottom: 2px solid var(--p1-brand);
  transform: rotate(45deg);
  transition: transform .2s;
}

.p1-comparison-question[open] .p1-comparison-toggle {
  transform: rotate(225deg);
}

.p1-comparison-answers {
  display: grid;
  grid-template-columns: repeat(2,minmax(0,1fr));
  gap: 14px;
  padding: 18px;
  background: #edf3f2;
  border-top: 1px solid var(--p1-line);
}

.p1-comparison-answer {
  min-width: 0;
  overflow: hidden;
  background: #fff;
  border: 1px solid #dce5e5;
  border-radius: 12px;
}

.p1-comparison-answer-head {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  min-height: 112px;
  padding: 16px 22px;
  border-bottom: 1px solid #e4e9e9;
}

.p1-comparison-answer-title {
  min-width: 0;
}

.p1-comparison-principle {
  margin: 6px 0 0;
  color: var(--p1-muted);
  font-size: 14px;
  line-height: 1.5;
}

.p1-comparison-avatar {
  display: grid;
  place-items: center;
  width: 35px;
  height: 35px;
  flex: none;
  border-radius: 50%;
  background: #e8eef0;
  color: var(--p1-brand);
  font-size: 13px;
  font-weight: 750;
}

.p1-comparison-answer:not(.p1-comparison-answer--general) .p1-comparison-avatar {
  background: #f4ede3;
  color: #87603d;
}

.p1-comparison-answer h4 {
  margin: 0;
  font-size: 17px;
}

.p1-comparison-transcript {
  padding: 4px 23px 22px;
  color: #2c414b;
  font-size: 15px;
  line-height: 1.9;
  overflow-wrap: anywhere;
}

.p1-comparison-transcript p {
  margin: 17px 0 0;
}

.p1-comparison-transcript h5 {
  margin: 22px 0 0;
  color: var(--p1-ink);
  font-size: 16px;
}

.p1-comparison-transcript strong {
  color: var(--p1-ink);
}

.p1-comparison-observe {
  display: grid;
  grid-template-columns: minmax(180px, .35fr) 1fr;
  gap: 34px;
  margin-top: 45px;
  padding: 35px 0;
  border-top: 1px solid var(--p1-line);
}

.p1-comparison-observe-head span {
  color: var(--compare-gold);
  font-size: 12px;
  font-weight: 750;
  letter-spacing: .13em;
}

.p1-comparison-observe h3 {
  margin: 10px 0 0;
  font-size: 24px;
}

.p1-comparison-observe ol {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.p1-comparison-observe li {
  display: grid;
  grid-template-columns: 185px 1fr;
  gap: 18px;
  padding: 15px 0;
  border-bottom: 1px solid var(--p1-line);
  color: var(--p1-muted);
  line-height: 1.7;
}

.p1-comparison-observe li:first-child {
  padding-top: 0;
}

.p1-comparison-observe li strong {
  color: var(--p1-ink);
}

@media (max-width:800px) {
  .p1-comparison-answers {
    grid-template-columns: 1fr;
  }
}

.p1-figure {
  padding: 16px;
}

.p1-figure img {
  display: block;
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: contain;
  background: #f2f4f3;
  border-radius: 10px;
  margin-bottom: 18px;
}

.p1-list {
  padding-left: 1.5em;
  line-height: 2;
  color: #3f5360;
  font-size: 17px;
}

.p1-faq {
  display: grid;
  gap: 10px;
}

.p1-faq details {
  background: #fff;
  border: 1px solid var(--p1-line);
  border-radius: 10px;
  padding: 17px 22px;
}

.p1-faq summary {
  cursor: pointer;
  font-weight: 650;
}

.p1-faq p {
  color: var(--p1-muted);
  line-height: 1.75;
}

.p1-cta {
  margin: 56px 0 0;
  background: var(--p1-brand);
  color: #fff;
  border-radius: var(--p1-radius);
  padding: clamp(30px,5vw,58px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
}

.p1-cta h2 {
  color: #fff;
}

.p1-cta p {
  max-width: 700px;
  line-height: 1.7;
  color: #dce9ef;
}

.p1-footer {
  background: #102e3d;
  color: #dce7eb;
}

.p1-footer-inner {
  max-width: var(--p1-width);
  margin: auto;
  padding: 48px 24px 24px;
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 30px;
}

.p1-footer a {
  color: #e7f0f4;
}

.p1-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 25px;
  align-content: start;
}

.p1-footer nav a {
  text-decoration: none;
}

.p1-footer-bottom {
  border-top: 1px solid #355361;
  grid-column: 1/-1;
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  gap: 18px;
}

.p1-legacy-content {
  padding-top: 20px;
}

/* Long-form Zen Echo story within the current site shell. */
.origins-main { max-width: none; padding: 0; }
.origins-main > .p1-breadcrumbs { max-width: var(--p1-width); margin: auto; padding: 24px 24px 0; }
.origins-main .philosophy-article { background: var(--p1-bg); color: var(--p1-ink); }
.origins-main .article-hero { max-width: var(--p1-width); padding: clamp(52px, 7vw, 88px) 0 56px; }
.origins-main .article-hero h1,
html[lang="zh-CN"] .origins-main .article-hero h1 { max-width: none; font-family: inherit; font-size: clamp(42px, 5vw, 68px); font-weight: 700; letter-spacing: -.035em; line-height: 1.2; }
.origins-main .article-subtitle { color: var(--p1-muted); font-family: inherit; font-size: clamp(19px, 2.3vw, 26px); }
.origins-main .article-byline { border-color: var(--p1-line); }
.origins-main .article-byline > a strong { font-family: inherit; font-weight: 600; }
.origins-main .article-layout { padding-top: 32px; }
.origins-main .article-content > p { font-family: inherit; font-size: 18px; line-height: 1.9; }
.origins-main .article-content h2 { font-family: inherit; font-size: clamp(28px, 3vw, 38px); font-weight: 700; border-color: var(--p1-line); }
.origins-main .article-toc { border-color: var(--p1-brand); }
.origins-main .article-toc a { border-color: var(--p1-line); }
.origins-main .article-product-photo { overflow: hidden; border: 1px solid var(--p1-line); border-radius: var(--p1-radius); background: #fff; }
.origins-main .article-product-photo img,
.origins-main .article-content .article-product-photo img { display: block; width: 100%; height: 360px; aspect-ratio: auto; object-fit: contain; padding: 22px; }
.origins-main .article-product-photo figcaption { margin: 0; padding: 0 22px 18px; color: var(--p1-muted); font-size: 13px; }
.origins-main .article-product-pair { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; margin: 42px 0 64px; }
.origins-main .article-product-pair .article-photo { width: 100%; }
.origins-main .article-product-pair .article-product-photo img { height: 300px; }
.origins-main .classic-method { background: #143e50; }
.origins-main .article-support { background: #fff; }
@media (max-width: 700px) {
  .origins-main .article-hero { padding-top: 48px; }
  .origins-main .article-product-pair { grid-template-columns: 1fr; }
  .origins-main .article-product-photo img,
  .origins-main .article-content .article-product-photo img { height: 300px; }
}

.p1-legacy-content .page-hero {
  margin-top: 0;
}

.p1-product-intro {
  background: #fff;
  border: 1px solid var(--p1-line);
  border-radius: var(--p1-radius);
  padding: 32px;
  margin-top: 28px;
}

.text-link {
  font-weight: 650;
}

.skip-link {
  position: absolute;
  left: -9999px;
}

.skip-link:focus {
  left: 12px;
  top: 12px;
  z-index: 100;
  background: #fff;
  padding: 8px;
}

.p1-main .site-footer {
  display: none;
}

@media (max-width:1000px) {
  .p1-desktop-nav,.p1-header-cta {
    display: none;
  }

  .p1-mobile-nav {
    display: block;
    margin-left: auto;
    position: relative;
  }

  .p1-mobile-nav summary {
    cursor: pointer;
    border: 1px solid var(--p1-line);
    border-radius: 8px;
    padding: 9px 14px;
    list-style: none;
  }

  .p1-mobile-nav summary::-webkit-details-marker {
    display: none;
  }

  .p1-mobile-nav nav {
    position: absolute;
    right: 0;
    top: 45px;
    min-width: 220px;
    display: grid;
    gap: 0;
    background: white;
    border: 1px solid var(--p1-line);
    box-shadow: 0 16px 34px #152c3d24;
    border-radius: 10px;
    padding: 8px;
  }

  .p1-mobile-nav a {
    padding: 10px 12px;
    white-space: normal;
  }

  .p1-mobile-nav a:hover {
    background: #edf3f3;
  }

}

@media (max-width:640px) {
  .p1-header-inner {
    min-height: 64px;
    padding: 10px 16px;
  }

  .p1-main {
    padding: 0 16px 48px;
  }

  .p1-hero {
    padding: 42px 23px;
    margin-top: 16px;
  }

  .p1-home-hero {
    min-height: calc(100svh - 64px);
    margin-top: 0;
    padding: 52px 23px;
    background-image: linear-gradient(180deg,rgba(247,249,247,.78),rgba(247,249,247,.93) 65%,rgba(247,249,247,.97)),url("/assets/images/home-hero-zen-echo.webp");
    background-position: 69% center;
  }

  .p1-hero h1 {
    font-size: 36px;
  }

  .p1-section {
    padding: 48px 2px;
  }

  .p1-card {
    padding: 21px;
  }

  .p1-comparison-question summary {
    gap: 14px;
    padding: 19px 16px;
  }

  .p1-comparison-answers {
    grid-template-columns: 1fr;
    padding: 10px;
  }

  .p1-comparison-transcript {
    padding: 4px 18px 18px;
  }

  .p1-comparison-observe {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .p1-comparison-observe li {
    grid-template-columns: 1fr;
    gap: 3px;
  }

  .p1-cta {
    display: block;
    margin-top: 40px;
  }

  .p1-cta .p1-button {
    margin-top: 12px;
  }

  .p1-footer-inner {
    display: block;
    padding: 38px 18px 22px;
  }

  .p1-footer nav {
    margin: 30px 0;
  }

  .p1-footer-bottom {
    display: flex;
    flex-wrap: wrap;
  }

  .p1-legacy-content .page-hero {
    padding-left: 0;
    padding-right: 0;
  }

}