:root {
  --ink: #0a0a0a;
  --ink-soft: #34302b;
  --muted: #6f675f;
  --paper: #ffffff;
  --paper-soft: #faf8f4;
  --gold: #b87519;
  --gold-deep: #87500b;
  --gold-soft: rgba(184, 117, 25, 0.12);
  --line: rgba(184, 117, 25, 0.36);
  --line-soft: rgba(184, 117, 25, 0.18);
  --shadow: 0 22px 70px rgba(29, 18, 5, 0.09);
  --max: 1440px;
  --serif: Georgia, "Times New Roman", "Noto Serif SC", "Songti SC", SimSun, serif;
  --sans: "Segoe UI", "Microsoft YaHei", Arial, sans-serif;
  color-scheme: light;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.72;
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
select,
textarea {
  font: inherit;
}

h1,
h2,
h3,
p {
  margin: 0;
}

h1,
h2,
h3 {
  font-family: var(--serif);
  font-weight: 400;
  line-height: 1.08;
}

h1 {
  font-size: 5.4rem;
}

h2 {
  font-size: 4.2rem;
}

h3 {
  font-size: 2rem;
}

.skip-link {
  position: fixed;
  left: 24px;
  top: 24px;
  z-index: 1000;
  transform: translateY(-150%);
  background: var(--ink);
  color: var(--paper);
  padding: 10px 14px;
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 90;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  min-height: 92px;
  padding: 18px 64px;
  background: rgba(255, 255, 255, 0.92);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(16px);
  transition: box-shadow 220ms ease, min-height 220ms ease;
}

.site-header.is-scrolled {
  min-height: 78px;
  box-shadow: 0 10px 34px rgba(29, 18, 5, 0.08);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
}

.brand-mark {
  position: relative;
  display: inline-grid;
  place-items: center;
  width: 48px;
  height: 48px;
  flex: 0 0 48px;
  color: var(--gold);
  border: 2px solid currentColor;
  transform: rotate(45deg);
  overflow: hidden;
}

.brand-mark::before {
  content: "A";
  transform: rotate(-45deg);
  font-family: var(--serif);
  font-size: 2rem;
  font-weight: 700;
  line-height: 1;
  color: var(--gold-deep);
}

.brand-mark::after {
  content: "";
  position: absolute;
  inset: -40%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.7), transparent);
  transform: translateX(-140%) rotate(0deg);
  animation: markShine 5.2s ease-in-out infinite;
}

.brand-mark-large {
  width: 88px;
  height: 88px;
  flex-basis: 88px;
  border-width: 3px;
}

.brand-mark-large::before {
  font-size: 3.8rem;
}

.brand-text {
  display: grid;
  gap: 2px;
  min-width: 0;
}

.brand-text span {
  font-family: var(--serif);
  font-size: 1.85rem;
  line-height: 1;
  white-space: nowrap;
}

.brand-text small {
  color: var(--gold-deep);
  font-family: var(--serif);
  font-size: 0.82rem;
  line-height: 1;
  text-transform: lowercase;
  white-space: nowrap;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 36px;
  margin-left: auto;
  color: var(--ink-soft);
  font-size: 0.96rem;
}

.site-nav a {
  position: relative;
  padding: 8px 0;
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 220ms ease;
}

.site-nav a:hover::after,
.site-nav a:focus-visible::after {
  transform: scaleX(1);
}

.nav-toggle {
  display: none;
  position: relative;
  width: 46px;
  min-height: 42px;
  border: 1px solid var(--line);
  background: var(--paper);
  color: var(--ink);
  padding: 0;
  cursor: pointer;
}

.nav-toggle::before,
.nav-toggle::after,
.nav-toggle span::before {
  content: "";
  position: absolute;
  left: 50%;
  width: 20px;
  height: 1px;
  background: currentColor;
  transform: translateX(-50%);
}

.nav-toggle::before {
  top: 14px;
}

.nav-toggle span::before {
  top: 20px;
}

.nav-toggle::after {
  top: 26px;
}

.nav-toggle span {
  position: absolute;
  inset: 0;
  overflow: hidden;
  color: transparent;
  font-size: 0;
}

.language-switch {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--line);
  background: var(--paper);
  color: var(--ink-soft);
  flex: 0 0 auto;
}

.language-switch button {
  min-height: 36px;
  min-width: 54px;
  border: 0;
  border-right: 1px solid var(--line-soft);
  background: transparent;
  color: inherit;
  padding: 7px 10px;
  cursor: pointer;
  font-size: 0.82rem;
}

.language-switch button:last-child {
  border-right: 0;
}

.language-switch button.is-active {
  background: var(--gold);
  color: var(--paper);
}

.hero {
  position: relative;
  min-height: 860px;
  padding: 150px 64px 86px;
  overflow: hidden;
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.98) 0%, rgba(255, 255, 255, 0.96) 58%, rgba(255, 255, 255, 0.72) 100%),
    repeating-linear-gradient(0deg, rgba(184, 117, 25, 0.04) 0 1px, transparent 1px 58px);
}

.hero-inner {
  position: relative;
  z-index: 2;
  width: min(100%, var(--max));
  margin: 0 auto;
  min-height: 620px;
  display: grid;
  align-content: center;
}

.hero-lockup {
  display: flex;
  align-items: center;
  gap: 34px;
  max-width: 1040px;
}

.hero-cn-name {
  font-family: var(--serif);
  font-size: 4.8rem;
  line-height: 1;
}

.hero h1 {
  margin-top: 8px;
  color: var(--gold-deep);
  font-size: 3rem;
  text-transform: uppercase;
}

.hero-slug {
  margin-top: 8px;
  color: var(--gold-deep);
  font-family: var(--serif);
  font-size: 1.35rem;
}

.ornament-line {
  position: relative;
  width: min(680px, 100%);
  height: 1px;
  margin: 42px 0 34px;
  background: var(--gold);
}

.ornament-line::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 11px;
  height: 11px;
  background: var(--gold);
  transform: translate(-50%, -50%) rotate(45deg);
}

.hero-tagline-cn {
  font-family: var(--serif);
  font-size: 2.25rem;
}

.hero-tagline-en {
  margin-top: 6px;
  color: var(--gold-deep);
  font-family: var(--serif);
  font-size: 1.8rem;
}

.hero-summary {
  max-width: 780px;
  margin-top: 30px;
  color: var(--ink-soft);
  font-size: 1.15rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 38px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  min-height: 54px;
  padding: 14px 24px;
  border: 1px solid transparent;
  border-radius: 2px;
  font-size: 0.95rem;
  transition: transform 180ms ease, border-color 180ms ease, background 180ms ease, color 180ms ease, box-shadow 180ms ease;
}

.button::after,
.text-link::after,
.situations li::after {
  content: "";
  width: 18px;
  height: 8px;
  border-right: 1px solid currentColor;
  border-bottom: 1px solid currentColor;
  transform: skewX(-42deg);
}

.button:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 26px rgba(184, 117, 25, 0.16);
}

.button-primary {
  background: var(--gold);
  color: var(--paper);
}

.button-secondary {
  border-color: var(--line);
  color: var(--ink);
  background: rgba(255, 255, 255, 0.78);
}

.button-secondary.light {
  color: var(--ink);
}

.globe-field {
  position: absolute;
  right: -130px;
  top: 150px;
  z-index: 1;
  width: 650px;
  aspect-ratio: 1;
  border: 1px solid rgba(184, 117, 25, 0.34);
  border-radius: 50%;
  opacity: 0.86;
  animation: globeFloat 11s ease-in-out infinite;
}

.globe-field::before,
.globe-field::after {
  content: "";
  position: absolute;
  inset: 5%;
  border: 1px solid rgba(184, 117, 25, 0.35);
  border-left-color: transparent;
  border-bottom-color: transparent;
  border-radius: 50%;
}

.globe-field::before {
  transform: rotate(-24deg) scaleX(0.66);
}

.globe-field::after {
  transform: rotate(36deg) scaleY(0.72);
}

.globe-field span {
  position: absolute;
  inset: 14%;
  border-radius: 50%;
  background-image: radial-gradient(circle, rgba(184, 117, 25, 0.48) 0 1px, transparent 1.6px);
  background-size: 9px 9px;
  mask-image: linear-gradient(90deg, transparent 0%, #000 22%, #000 72%, transparent 100%);
}

.globe-field i {
  position: absolute;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow:
    -150px 80px 0 rgba(184, 117, 25, 0.7),
    -92px 260px 0 rgba(184, 117, 25, 0.52),
    82px 184px 0 rgba(184, 117, 25, 0.72);
  left: 48%;
  top: 37%;
  animation: nodePulse 2.8s ease-in-out infinite;
}

.answer-strip {
  position: relative;
  z-index: 3;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0;
  width: min(100%, 1120px);
  margin: -52px auto 0;
  padding: 0 24px;
}

.brand-keywords {
  align-items: center;
  color: var(--ink);
  font-family: var(--serif);
  font-size: 1.2rem;
}

.brand-keywords span {
  padding: 20px 28px;
  border-top: 1px solid var(--gold);
  border-bottom: 1px solid var(--gold);
  background: rgba(255, 255, 255, 0.9);
}

.brand-keywords span + span::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  margin: 0 28px 3px 0;
  border-radius: 50%;
  background: var(--gold);
}

.section-light,
.section-dark {
  padding: 112px 64px;
}

.section-light {
  background: var(--paper);
}

.section-dark {
  position: relative;
  overflow: hidden;
  background:
    linear-gradient(135deg, rgba(184, 117, 25, 0.2), transparent 34%),
    #0f0d0a;
  color: var(--paper);
}

.section-dark::after {
  content: "";
  position: absolute;
  right: -180px;
  bottom: -260px;
  width: 560px;
  aspect-ratio: 1;
  border: 1px solid rgba(184, 117, 25, 0.25);
  border-radius: 50%;
}

.services {
  display: grid;
  grid-template-columns: minmax(280px, 0.72fr) minmax(520px, 1.28fr);
  gap: 72px;
  width: min(100%, var(--max));
  margin: 0 auto;
}

.section-media {
  grid-row: span 2;
  align-self: stretch;
}

.media-rail {
  min-height: 620px;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--paper-soft);
  box-shadow: var(--shadow);
}

.media-rail img {
  width: 100%;
  height: 100%;
  min-height: 620px;
  object-fit: cover;
  object-position: center;
  filter: saturate(0.88) contrast(1.02);
}

.section-label {
  display: block;
  color: var(--gold-deep);
  font-family: var(--serif);
  font-size: 1.05rem;
}

.section-intro {
  align-self: start;
}

.section-intro h2,
.wide-intro h2,
.faq-intro h2,
.partners-intro h2,
.credibility h2,
.contact-copy h2 {
  margin-top: 24px;
}

.section-intro p:not(.section-label),
.wide-intro p:not(.section-label),
.faq-intro p:not(.section-label),
.partners-intro p:not(.section-label),
.credibility p,
.contact-copy p:not(.section-label) {
  margin-top: 24px;
  color: var(--ink-soft);
  font-size: 1.08rem;
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 16px;
  margin-top: 34px;
  color: var(--gold-deep);
  border-bottom: 1px solid var(--line);
  font-size: 1rem;
}

.service-list {
  display: grid;
  align-self: start;
}

.service-row {
  display: grid;
  grid-template-columns: 72px 1fr 42px;
  gap: 30px;
  align-items: start;
  padding: 28px 0;
  border-top: 1px solid var(--line);
  transition: transform 240ms ease, background 240ms ease, padding 240ms ease;
}

.service-row:last-child {
  border-bottom: 1px solid var(--line);
}

.service-row:hover {
  transform: translateX(10px);
  background: linear-gradient(90deg, var(--gold-soft), transparent 68%);
  padding-left: 18px;
}

.service-number {
  display: grid;
  place-items: center;
  width: 52px;
  height: 52px;
  color: var(--gold-deep);
  border: 1px solid var(--gold);
  border-radius: 50%;
  font-family: var(--serif);
  font-size: 1.1rem;
}

.service-row h3 {
  font-size: 1.75rem;
}

.service-row p {
  margin-top: 10px;
  color: var(--ink-soft);
}

.service-row a {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  color: var(--gold-deep);
  border: 1px solid var(--line);
  font-size: 1.8rem;
  line-height: 1;
  transition: background 180ms ease, color 180ms ease;
}

.service-row a:hover {
  background: var(--gold);
  color: var(--paper);
}

.method {
  display: grid;
  grid-template-columns: minmax(340px, 0.86fr) minmax(520px, 1.14fr);
  gap: 78px;
  width: min(100%, var(--max));
  margin: 0 auto;
}

.method .section-label,
.contact .section-label {
  color: #d99b3a;
}

.method-copy h2 {
  margin-top: 20px;
  max-width: 660px;
}

.timeline {
  list-style: none;
  padding: 44px 0 0;
  margin: 0;
  display: grid;
  gap: 40px;
}

.timeline li {
  display: grid;
  grid-template-columns: 76px 1fr;
  gap: 24px;
  position: relative;
}

.timeline li::before {
  content: "";
  position: absolute;
  left: 38px;
  top: 76px;
  bottom: -40px;
  width: 1px;
  background: rgba(184, 117, 25, 0.72);
}

.timeline li:last-child::before {
  display: none;
}

.timeline span {
  display: grid;
  place-items: center;
  width: 76px;
  height: 76px;
  border: 1px solid var(--gold);
  border-radius: 50%;
  color: #e0a64a;
  font-family: var(--serif);
  font-size: 1.35rem;
}

.timeline h3 {
  color: #e0a64a;
}

.timeline p,
.situations li,
.contact-copy p:not(.section-label) {
  color: rgba(255, 255, 255, 0.76);
}

.method-side {
  position: relative;
  z-index: 1;
}

.method-side img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border: 1px solid rgba(184, 117, 25, 0.36);
  box-shadow: 0 22px 60px rgba(0, 0, 0, 0.28);
}

.situations {
  margin-top: 44px;
}

.situations h2 {
  margin-top: 14px;
  font-size: 3.2rem;
}

.situations ul {
  list-style: none;
  padding: 16px 0 0;
  margin: 0;
}

.situations li {
  display: flex;
  justify-content: space-between;
  gap: 22px;
  padding: 14px 0 14px 32px;
  border-top: 1px solid rgba(184, 117, 25, 0.52);
  position: relative;
}

.situations li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 25px;
  width: 12px;
  height: 1px;
  background: var(--gold);
}

.ai-optimized,
.insights,
.faq,
.credibility,
.partners,
.contact {
  width: min(100%, var(--max));
  margin: 0 auto;
}

.wide-intro {
  max-width: 980px;
}

.fit-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  margin-top: 48px;
  border: 1px solid var(--line);
}

.fit-grid article {
  min-height: 250px;
  padding: 32px;
  border-right: 1px solid var(--line-soft);
  background: linear-gradient(180deg, #fff, var(--paper-soft));
}

.fit-grid article:last-child {
  border-right: 0;
}

.fit-grid h3,
.insight-feature h3 {
  font-size: 1.85rem;
}

.fit-grid p,
.insight-feature p {
  margin-top: 16px;
  color: var(--ink-soft);
}

.insights {
  display: grid;
  grid-template-columns: minmax(300px, 0.78fr) minmax(440px, 1.22fr);
  gap: 72px;
  border-top: 1px solid var(--line);
}

.insight-feature {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 28px;
  align-items: end;
  padding: 38px;
  border: 1px solid var(--line);
  background: var(--paper-soft);
}

.learning-preview {
  display: grid;
  grid-template-columns: minmax(420px, 1.05fr) minmax(360px, 0.95fr);
  gap: 72px;
  width: min(100%, var(--max));
  margin: 0 auto;
  border-top: 1px solid var(--line);
}

.learning-preview h2,
.course-hub-intro h2,
.admin-notice h2,
.form-section-title h2 {
  margin-top: 20px;
}

.learning-preview p:not(.section-label),
.course-hub-intro p:not(.section-label),
.admin-notice p:not(.section-label),
.admin-panel p {
  margin-top: 22px;
  color: var(--ink-soft);
  font-size: 1.06rem;
}

.learning-preview-list {
  align-self: end;
  display: grid;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.learning-preview-list span {
  min-height: 74px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 18px 0;
  border-top: 1px solid var(--line-soft);
  color: var(--ink-soft);
  font-family: var(--serif);
  font-size: 1.35rem;
}

.learning-preview-list span:first-child {
  border-top: 0;
}

.learning-preview-list span::after {
  content: "";
  width: 38px;
  height: 1px;
  background: var(--gold);
}

.course-hub,
.course-admin-shell {
  width: min(100%, var(--max));
  margin: 0 auto;
}

.course-hub-intro {
  max-width: 940px;
}

.course-toolbar {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 46px;
  padding: 22px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.course-toolbar label,
.course-admin-form label {
  display: grid;
  gap: 8px;
  color: var(--ink-soft);
  font-size: 0.92rem;
}

.course-toolbar select,
.course-admin-form input,
.course-admin-form select,
.course-admin-form textarea {
  width: 100%;
  min-height: 52px;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: var(--paper);
  color: var(--ink);
  padding: 12px 14px;
  outline: none;
}

.course-toolbar select:focus,
.course-admin-form input:focus,
.course-admin-form select:focus,
.course-admin-form textarea:focus {
  border-color: var(--gold);
  box-shadow: 0 0 0 3px rgba(184, 117, 25, 0.12);
}

.course-learning-layout {
  display: grid;
  grid-template-columns: minmax(420px, 0.95fr) minmax(460px, 1.05fr);
  gap: 34px;
  align-items: start;
  margin-top: 42px;
}

.course-library {
  display: grid;
  gap: 18px;
}

.course-card {
  display: grid;
  grid-template-columns: 176px 1fr;
  min-height: 214px;
  border: 1px solid var(--line);
  background: var(--paper);
  box-shadow: 0 16px 46px rgba(29, 18, 5, 0.06);
  overflow: hidden;
  transition: transform 220ms ease, box-shadow 220ms ease, border-color 220ms ease;
}

.course-card:hover {
  transform: translateY(-4px);
  border-color: rgba(184, 117, 25, 0.72);
  box-shadow: 0 24px 70px rgba(29, 18, 5, 0.11);
}

.course-card-cover {
  min-height: 100%;
  background: var(--paper-soft);
  border-right: 1px solid var(--line-soft);
}

.course-card-cover img {
  width: 100%;
  height: 100%;
  min-height: 214px;
  object-fit: cover;
}

.course-cover-fallback {
  position: relative;
  height: 100%;
  min-height: 214px;
  display: grid;
  place-items: center;
  overflow: hidden;
  background:
    radial-gradient(circle at 70% 24%, rgba(184, 117, 25, 0.16), transparent 34%),
    repeating-linear-gradient(0deg, rgba(184, 117, 25, 0.07) 0 1px, transparent 1px 28px),
    var(--paper-soft);
}

.course-cover-fallback::before {
  content: "";
  position: absolute;
  width: 180px;
  aspect-ratio: 1;
  border: 1px solid rgba(184, 117, 25, 0.42);
  border-radius: 50%;
  animation: globeFloat 10s ease-in-out infinite;
}

.course-cover-fallback span {
  position: relative;
  display: grid;
  place-items: center;
  width: 62px;
  height: 62px;
  overflow: hidden;
  color: var(--gold-deep);
  border: 2px solid var(--gold);
  transform: rotate(45deg);
  font-family: var(--serif);
  font-size: 2.4rem;
  font-weight: 700;
}

.course-cover-fallback span::before {
  content: "A";
  transform: rotate(-45deg);
  color: var(--gold-deep);
}

.course-cover-fallback span {
  color: transparent;
}

.course-card-body {
  display: grid;
  align-content: start;
  gap: 14px;
  padding: 24px;
}

.course-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.course-meta span,
.admin-course-state {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 4px 9px;
  border: 1px solid var(--line-soft);
  color: var(--gold-deep);
  font-size: 0.78rem;
}

.course-card h3 {
  font-size: 1.65rem;
}

.course-card p {
  color: var(--ink-soft);
}

.course-card .button {
  justify-self: start;
  min-height: 44px;
  padding: 10px 16px;
}

.course-player-panel {
  position: sticky;
  top: 112px;
  display: grid;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, #fff, var(--paper-soft));
  box-shadow: var(--shadow);
  overflow: hidden;
}

.course-player-media {
  min-height: 240px;
  display: grid;
  place-items: center;
  background:
    linear-gradient(135deg, rgba(184, 117, 25, 0.14), transparent 48%),
    #17120c;
}

.course-player-media audio,
.course-player-media video {
  width: calc(100% - 48px);
  max-height: 420px;
}

.course-player-media video {
  height: auto;
}

.course-empty-player {
  display: grid;
  place-items: center;
  width: 100%;
  min-height: 240px;
  padding: 32px;
  color: rgba(255, 255, 255, 0.76);
  text-align: center;
}

.course-player-copy {
  padding: 34px;
}

.course-player-copy h2 {
  margin-top: 18px;
  font-size: 2.8rem;
}

.course-player-copy > p:not(.section-label) {
  margin-top: 18px;
  color: var(--ink-soft);
}

.course-details {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0;
  margin: 26px 0 0;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.course-details div {
  padding: 14px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.course-details dt {
  color: var(--gold-deep);
  font-size: 0.82rem;
}

.course-details dd {
  margin: 4px 0 0;
  color: var(--ink);
}

.course-outline {
  margin-top: 28px;
}

.course-outline h3 {
  font-size: 1.55rem;
}

.course-outline ol {
  margin: 14px 0 0;
  padding-left: 22px;
  color: var(--ink-soft);
}

.course-empty {
  padding: 28px;
  border: 1px solid var(--line);
  color: var(--ink-soft);
}

.admin-body {
  background: var(--paper);
}

.admin-hero h1 {
  max-width: 980px;
}

.admin-notice {
  max-width: 980px;
  padding-bottom: 46px;
  border-bottom: 1px solid var(--line);
}

.course-admin-grid {
  display: grid;
  grid-template-columns: minmax(520px, 1.12fr) minmax(360px, 0.88fr);
  gap: 34px;
  align-items: start;
  margin-top: 46px;
}

.course-admin-form,
.admin-panel {
  border: 1px solid var(--line);
  background: var(--paper);
  box-shadow: 0 18px 52px rgba(29, 18, 5, 0.06);
}

.course-admin-form {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 20px;
  padding: 28px;
}

.course-admin-form textarea {
  min-height: 116px;
  resize: vertical;
}

.form-section-title,
.course-admin-form .form-wide,
.admin-actions,
.course-admin-form .form-status {
  grid-column: 1 / -1;
}

.admin-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 6px;
}

.button.danger {
  border-color: rgba(128, 35, 20, 0.28);
  color: #7d281b;
}

.course-admin-form .form-status {
  color: var(--gold-deep);
}

.course-admin-side {
  display: grid;
  gap: 22px;
}

.admin-panel {
  padding: 24px;
}

.admin-course-list {
  display: grid;
  gap: 14px;
  margin-top: 20px;
}

.admin-course-row {
  display: grid;
  gap: 16px;
  padding: 18px;
  border: 1px solid var(--line-soft);
  background: var(--paper-soft);
}

.admin-course-row h3 {
  margin-top: 10px;
  font-size: 1.45rem;
}

.admin-course-row p,
.admin-course-row small {
  color: var(--ink-soft);
}

.admin-row-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.admin-row-actions .button,
.admin-panel .button {
  min-height: 42px;
  padding: 9px 14px;
}

.export-output {
  width: 100%;
  min-height: 260px;
  margin-top: 18px;
  border: 1px solid var(--line);
  background: var(--paper-soft);
  color: var(--ink-soft);
  padding: 14px;
  resize: vertical;
}

.faq {
  display: grid;
  grid-template-columns: minmax(300px, 0.76fr) minmax(440px, 1.24fr);
  gap: 70px;
  border-top: 1px solid var(--line);
}

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

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

summary {
  cursor: pointer;
  color: var(--ink);
  font-size: 1.08rem;
  font-weight: 650;
  list-style: none;
}

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

summary::after {
  content: "+";
  float: right;
  color: var(--gold-deep);
  font-size: 1.4rem;
  line-height: 1;
}

details[open] summary::after {
  content: "-";
}

details p {
  max-width: 780px;
  margin-top: 14px;
  color: var(--ink-soft);
}

.credibility {
  display: grid;
  grid-template-columns: minmax(420px, 0.92fr) minmax(420px, 1.08fr);
  gap: 78px;
  align-items: center;
  border-top: 1px solid var(--line);
}

.credibility img {
  width: 100%;
  aspect-ratio: 1.5 / 1;
  object-fit: cover;
  object-position: center;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.proof-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  margin-top: 38px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.proof-list span {
  min-height: 88px;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 16px;
  color: var(--ink-soft);
  border-right: 1px solid var(--line);
}

.proof-list span:last-child {
  border-right: 0;
}

.partners {
  display: grid;
  grid-template-columns: minmax(320px, 0.68fr) minmax(560px, 1.32fr);
  gap: 70px;
  border-top: 1px solid var(--line);
}

.partner-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.partner-profile {
  display: grid;
  background: var(--paper);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  transition: transform 220ms ease, box-shadow 220ms ease;
}

.partner-profile:hover {
  transform: translateY(-6px);
  box-shadow: 0 26px 80px rgba(29, 18, 5, 0.13);
}

.partner-profile img {
  width: 100%;
  aspect-ratio: 0.86 / 1;
  object-fit: cover;
  object-position: center top;
  border-bottom: 1px solid var(--line);
}

.partner-profile > div {
  padding: 28px;
}

.partner-profile h3 {
  display: grid;
  gap: 6px;
  font-size: 2rem;
}

.partner-profile h3 small {
  color: var(--gold-deep);
  font-size: 1.4rem;
  font-weight: 400;
}

.partner-role {
  margin-top: 16px;
  font-family: var(--serif);
  font-size: 1.25rem;
  color: var(--ink);
}

.credentials {
  list-style: none;
  display: grid;
  gap: 6px;
  padding: 18px 0 0;
  margin: 0;
  color: var(--ink-soft);
}

.partner-contact {
  display: grid;
  gap: 8px;
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--line-soft);
}

.partner-contact div {
  display: grid;
  grid-template-columns: 74px 1fr;
  gap: 12px;
}

.partner-contact dt {
  color: var(--gold-deep);
}

.partner-contact dd {
  margin: 0;
  color: var(--ink);
  overflow-wrap: anywhere;
}

.contact {
  display: grid;
  grid-template-columns: minmax(340px, 0.86fr) minmax(440px, 1.14fr);
  gap: 72px;
}

.contact > * {
  position: relative;
  z-index: 1;
}

.contact-email,
.contact-phone {
  margin-top: 20px;
}

.contact-email a,
.contact-phone a {
  color: #e0a64a;
  border-bottom: 1px solid rgba(224, 166, 74, 0.5);
}

.contact-form {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 22px;
  align-content: start;
  padding: 32px;
  border: 1px solid rgba(184, 117, 25, 0.42);
  background: rgba(255, 255, 255, 0.04);
}

.contact-form label {
  display: grid;
  gap: 8px;
  color: rgba(255, 255, 255, 0.9);
  font-size: 0.95rem;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
  width: 100%;
  min-height: 54px;
  border: 1px solid rgba(184, 117, 25, 0.6);
  border-radius: 2px;
  background: rgba(255, 255, 255, 0.06);
  color: var(--paper);
  padding: 14px 15px;
  outline: none;
}

.contact-form textarea {
  min-height: 118px;
  resize: vertical;
}

.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
  border-color: #e0a64a;
  box-shadow: 0 0 0 3px rgba(224, 166, 74, 0.16);
}

.contact-form option {
  color: var(--ink);
}

.form-wide,
.form-note,
.contact-form .button,
.form-status {
  grid-column: 1 / -1;
}

.form-note {
  margin: 0;
  color: rgba(255, 255, 255, 0.58);
  font-size: 0.9rem;
}

.contact-form .button {
  width: min(360px, 100%);
  border: 0;
}

.form-status {
  min-height: 26px;
  color: #e0a64a;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 32px;
  padding: 34px 64px;
  background: var(--paper);
  color: var(--ink);
  border-top: 1px solid var(--line);
}

.footer-brand .brand-text span {
  font-size: 1.55rem;
}

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 32px;
  color: var(--ink-soft);
}

.page-hero {
  position: relative;
  overflow: hidden;
  padding: 178px 64px 92px;
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 1), rgba(255, 255, 255, 0.78)),
    repeating-linear-gradient(0deg, rgba(184, 117, 25, 0.04) 0 1px, transparent 1px 58px);
  border-bottom: 1px solid var(--line);
}

.page-hero::after {
  content: "";
  position: absolute;
  right: -160px;
  top: 118px;
  width: 430px;
  aspect-ratio: 1;
  border: 1px solid rgba(184, 117, 25, 0.3);
  border-radius: 50%;
  background-image: radial-gradient(circle, rgba(184, 117, 25, 0.36) 0 1px, transparent 1.5px);
  background-size: 8px 8px;
  mask-image: linear-gradient(90deg, transparent, #000 36%, #000 82%, transparent);
  animation: globeFloat 12s ease-in-out infinite;
}

.page-hero-inner,
.content-section {
  position: relative;
  z-index: 1;
  width: min(100%, var(--max));
  margin: 0 auto;
}

.page-hero h1 {
  max-width: 1040px;
  font-size: 4.6rem;
}

.page-hero p:not(.breadcrumb) {
  max-width: 760px;
  margin-top: 24px;
  color: var(--ink-soft);
  font-size: 1.16rem;
}

.breadcrumb {
  margin-bottom: 28px;
  color: var(--gold-deep);
  font-size: 0.92rem;
}

.breadcrumb a {
  color: var(--ink-soft);
}

.content-section {
  padding: 104px 64px;
}

.content-grid {
  display: grid;
  grid-template-columns: minmax(280px, 0.7fr) minmax(420px, 1.3fr);
  gap: 72px;
}

.content-grid h2 {
  margin-top: 24px;
  font-size: 3.4rem;
}

.content-grid p,
.content-grid li,
.article-body p,
.article-body li {
  color: var(--ink-soft);
}

.check-list {
  display: grid;
  gap: 14px;
  padding: 0;
  margin: 28px 0 0;
  list-style: none;
}

.check-list li {
  padding-left: 28px;
  position: relative;
}

.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 13px;
  width: 13px;
  height: 1px;
  background: var(--gold);
}

.article-body {
  max-width: 960px;
}

.article-body h2 {
  margin-top: 54px;
  font-size: 2.6rem;
}

.article-body p {
  margin-top: 18px;
}

.article-body ul,
.article-body ol {
  margin-top: 18px;
  padding-left: 22px;
}

.note-box {
  margin-top: 36px;
  padding: 28px;
  border: 1px solid var(--line);
  background: var(--paper-soft);
}

[data-reveal] {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 720ms ease, transform 720ms ease;
}

[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

@keyframes markShine {
  0%,
  70% {
    transform: translateX(-140%);
  }
  100% {
    transform: translateX(140%);
  }
}

@keyframes globeFloat {
  0%,
  100% {
    transform: translateY(0) rotate(0deg);
  }
  50% {
    transform: translateY(-18px) rotate(1.6deg);
  }
}

@keyframes nodePulse {
  0%,
  100% {
    opacity: 0.7;
    transform: scale(1);
  }
  50% {
    opacity: 1;
    transform: scale(1.22);
  }
}

@media (max-width: 1180px) {
  h1 {
    font-size: 4.2rem;
  }

  h2 {
    font-size: 3.2rem;
  }

  .site-header {
    padding: 16px 28px;
  }

  .site-nav {
    gap: 22px;
  }

  .hero,
  .section-light,
  .section-dark,
  .page-hero,
  .content-section,
  .site-footer {
    padding-left: 36px;
    padding-right: 36px;
  }

  .hero-cn-name {
    font-size: 3.8rem;
  }

  .globe-field {
    right: -260px;
    opacity: 0.55;
  }

  .services,
  .method,
  .insights,
  .faq,
  .credibility,
  .partners,
  .contact,
  .learning-preview,
  .course-learning-layout,
  .course-admin-grid,
  .content-grid {
    grid-template-columns: 1fr;
  }

  .course-player-panel {
    position: static;
  }

  .section-media {
    grid-row: auto;
  }

  .media-rail,
  .media-rail img {
    min-height: 360px;
  }
}

@media (max-width: 920px) {
  .site-header {
    min-height: 76px;
    flex-wrap: nowrap;
    gap: 12px;
  }

  .nav-toggle {
    display: inline-grid;
    order: 3;
    flex: 0 0 46px;
  }

  .site-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    margin-left: 0;
    background: rgba(255, 255, 255, 0.98);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 18px 40px rgba(29, 18, 5, 0.08);
    order: 4;
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav a {
    padding: 16px 28px;
    border-top: 1px solid var(--line-soft);
  }

  .language-switch {
    order: 2;
    margin-left: auto;
  }

  .hero {
    min-height: 760px;
    padding-top: 132px;
  }

  .hero-lockup {
    align-items: flex-start;
    flex-direction: column;
    gap: 24px;
  }

  .hero h1 {
    font-size: 2.35rem;
  }

  .hero-cn-name {
    font-size: 3.4rem;
  }

  .hero-tagline-cn {
    font-size: 1.8rem;
  }

  .hero-tagline-en {
    font-size: 1.35rem;
  }

  .brand-keywords span {
    padding: 16px 18px;
  }

  .fit-grid,
  .partner-list,
  .proof-list,
  .insight-feature,
  .course-toolbar,
  .course-admin-form,
  .contact-form {
    grid-template-columns: 1fr;
  }

  .admin-nav {
    position: static;
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    gap: 18px;
    margin-left: auto;
    border: 0;
    box-shadow: none;
  }

  .admin-nav a {
    padding: 8px 0;
    border-top: 0;
  }

  .admin-body .site-header {
    flex-wrap: wrap;
  }

  .admin-body .admin-nav {
    flex: 1 1 100%;
    justify-content: flex-start;
    margin-left: 0;
    padding-top: 6px;
  }

  .fit-grid article,
  .proof-list span {
    border-right: 0;
    border-bottom: 1px solid var(--line-soft);
  }

  .fit-grid article:last-child,
  .proof-list span:last-child {
    border-bottom: 0;
  }
}

@media (max-width: 620px) {
  body {
    font-size: 15px;
  }

  .site-header {
    padding: 14px 18px;
  }

  .brand-mark {
    width: 38px;
    height: 38px;
    flex-basis: 38px;
  }

  .brand-mark::before {
    font-size: 1.6rem;
  }

  .brand-text span {
    font-size: 1.25rem;
  }

  .brand-text small {
    font-size: 0.7rem;
  }

  .language-switch button {
    min-width: 46px;
    padding: 7px 8px;
  }

  h1 {
    font-size: 3rem;
  }

  h2,
  .page-hero h1 {
    font-size: 2.55rem;
  }

  h3,
  .service-row h3,
  .fit-grid h3,
  .insight-feature h3 {
    font-size: 1.55rem;
  }

  .hero,
  .section-light,
  .section-dark,
  .page-hero,
  .content-section,
  .site-footer {
    padding-left: 22px;
    padding-right: 22px;
  }

  .hero {
    min-height: 720px;
    padding-top: 120px;
  }

  .brand-mark-large {
    width: 68px;
    height: 68px;
    flex-basis: 68px;
  }

  .brand-mark-large::before {
    font-size: 2.8rem;
  }

  .hero-cn-name {
    font-size: 2.65rem;
  }

  .hero h1 {
    font-size: 1.85rem;
  }

  .hero-summary {
    font-size: 1rem;
  }

  .hero-actions .button,
  .contact-form .button {
    width: 100%;
  }

  .brand-keywords {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    width: calc(100% - 44px);
    font-size: 1rem;
  }

  .brand-keywords span {
    text-align: center;
    border: 1px solid var(--line);
  }

  .brand-keywords span + span::before {
    display: none;
  }

  .services,
  .method,
  .insights,
  .faq,
  .credibility,
  .partners,
  .contact,
  .learning-preview,
  .course-learning-layout,
  .course-admin-grid {
    gap: 42px;
  }

  .learning-preview-list span {
    min-height: 62px;
    font-size: 1.12rem;
  }

  .course-card {
    grid-template-columns: 1fr;
  }

  .course-card-cover {
    border-right: 0;
    border-bottom: 1px solid var(--line-soft);
  }

  .course-card-cover img,
  .course-cover-fallback {
    min-height: 190px;
  }

  .course-player-copy,
  .course-admin-form,
  .admin-panel {
    padding: 22px;
  }

  .course-player-copy h2 {
    font-size: 2.15rem;
  }

  .course-details {
    grid-template-columns: 1fr;
  }

  .admin-actions .button {
    width: 100%;
  }

  .service-row {
    grid-template-columns: 1fr 40px;
    gap: 16px;
  }

  .service-number {
    grid-column: 1 / -1;
  }

  .timeline li {
    grid-template-columns: 58px 1fr;
  }

  .timeline span {
    width: 58px;
    height: 58px;
    font-size: 1rem;
  }

  .timeline li::before {
    left: 29px;
    top: 58px;
  }

  .situations h2 {
    font-size: 2.25rem;
  }

  .partner-contact div {
    grid-template-columns: 1fr;
    gap: 2px;
  }

  .contact-form {
    padding: 22px;
  }

  .site-footer {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition: none !important;
    animation: none !important;
  }

  [data-reveal] {
    opacity: 1;
    transform: none;
  }
}