/* ===== RESET ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
ul { list-style: none; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
a:hover { opacity: 0.82; }

/* ===== TOKENS ===== */
:root {
  --bg:       #F8F6F0;
  --bg-warm:  #F0EDE4;
  --bg-dark:  #0F0F0F;
  --white:    #FFFFFF;
  --text:     #1A1A1A;
  --text-2:   #4A4A4A;
  --text-3:   #888888;
  --gold:     #B8892A;
  --gold-lt:  #F0E4C0;
  --gold-dk:  #8B6820;
  --border:   #DDD9CE;
  --radius:   12px;
  --shadow:   0 2px 20px rgba(0,0,0,0.06);
  --shadow-lg:0 8px 40px rgba(0,0,0,0.14);
  --ease:     0.28s ease;
}

/* ===== BASE ===== */
html { scroll-behavior: smooth; }

body {
  font-family: 'Noto Sans SC', -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background: var(--white);
}

/* ===== LAYOUT ===== */
.container { max-width: 1160px; margin: 0 auto; padding: 0 24px; }
.container-narrow { max-width: 760px; }

.section { padding: 96px 0; }
.bg-warm  { background: var(--bg-warm); }
.bg-dark  { background: var(--bg-dark); color: white; }

/* ===== SECTION HEADER ===== */
.section-header { text-align: center; margin-bottom: 64px; }

.section-tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold);
  border: 1px solid var(--gold);
  padding: 4px 14px;
  border-radius: 100px;
  margin-bottom: 20px;
}
.section-tag.light { color: var(--gold-lt); border-color: var(--gold-lt); }

.section-title {
  font-family: 'Noto Serif SC', Georgia, serif;
  font-size: 2.375rem;
  font-weight: 700;
  line-height: 1.3;
  color: var(--text);
  margin-bottom: 14px;
}
.section-title.light { color: white; }

.section-intro {
  font-size: 1.0625rem;
  color: var(--text-2);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.9;
}
.section-intro.light { color: rgba(255,255,255,0.7); }

/* ===== NAV ===== */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  transition: background var(--ease), box-shadow var(--ease);
}
.nav.scrolled {
  background: rgba(255,255,255,0.97);
  box-shadow: 0 1px 0 var(--border);
  backdrop-filter: blur(10px);
}

.nav-inner {
  width: 100%;
  max-width: 1160px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-logo img {
  height: 32px; width: auto;
  filter: brightness(0) invert(1);
  transition: filter var(--ease);
}
.nav.scrolled .nav-logo img { filter: none; }

.nav-links { display: flex; gap: 28px; margin-left: auto; }
.nav-links a {
  text-decoration: none;
  font-size: 0.9rem;
  color: rgba(255,255,255,0.8);
  transition: color var(--ease);
}
.nav-links a:hover { color: white; }
.nav.scrolled .nav-links a { color: var(--text-2); }
.nav.scrolled .nav-links a:hover { color: var(--text); }

.nav-cta {
  text-decoration: none;
  background: var(--gold);
  color: white;
  font-size: 0.875rem;
  font-weight: 500;
  padding: 8px 20px;
  border-radius: 6px;
  transition: background var(--ease);
}
.nav-cta:hover { background: var(--gold-dk); }

.nav-toggle { display: none; }

/* ===== HERO ===== */
.hero {
  background: var(--bg-dark);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 120px 24px 80px;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(ellipse 80% 60% at 50% 40%, rgba(184,137,42,0.13) 0%, transparent 70%);
  pointer-events: none;
}

.hero-inner { position: relative; max-width: 840px; margin: 0 auto; }

.hero-kicker {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  color: var(--gold);
  margin-bottom: 28px;
}

.hero-title {
  font-family: 'Noto Serif SC', serif;
  font-size: 4.25rem;
  font-weight: 700;
  color: white;
  line-height: 1.15;
  margin-bottom: 18px;
  letter-spacing: -0.01em;
}

.hero-sub {
  font-family: 'Noto Serif SC', serif;
  font-size: 1.625rem;
  color: var(--gold);
  margin-bottom: 22px;
  letter-spacing: 0.06em;
}

.hero-desc {
  font-size: 1.0625rem;
  color: rgba(255,255,255,0.65);
  line-height: 2;
  max-width: 580px;
  margin: 0 auto 40px;
}

.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 12px;
  overflow: hidden;
  width: fit-content;
  margin: 0 auto 40px;
}
.stat { display: flex; flex-direction: column; align-items: center; padding: 16px 26px; }
.stat-num {
  font-family: 'Noto Serif SC', serif;
  font-size: 1.25rem;
  font-weight: 700;
  color: white;
  line-height: 1.2;
}
.stat-label { font-size: 0.72rem; color: rgba(255,255,255,0.45); margin-top: 2px; }
.stat-div { width: 1px; height: 36px; background: rgba(255,255,255,0.1); flex-shrink: 0; }

.hero-actions { display: flex; gap: 16px; justify-content: center; margin-bottom: 18px; }

.btn-gold {
  display: inline-block; text-decoration: none;
  background: var(--gold); color: white;
  font-size: 1rem; font-weight: 500;
  padding: 14px 32px; border-radius: 8px;
  transition: background var(--ease), transform var(--ease);
}
.btn-gold:hover { background: var(--gold-dk); transform: translateY(-1px); }

.btn-ghost {
  display: inline-block; text-decoration: none;
  border: 1px solid rgba(255,255,255,0.25);
  color: rgba(255,255,255,0.8);
  font-size: 1rem;
  padding: 14px 32px; border-radius: 8px;
  transition: border-color var(--ease), color var(--ease);
}
.btn-ghost:hover { border-color: rgba(255,255,255,0.55); color: white; }

.hero-note { font-size: 0.8rem; color: rgba(255,255,255,0.35); }

.hero-scroll {
  position: absolute; bottom: 32px; left: 50%; transform: translateX(-50%);
}
.hero-scroll span {
  display: block; width: 1px; height: 48px;
  background: linear-gradient(to bottom, rgba(255,255,255,0.35), transparent);
  animation: scrollLine 2.2s ease-in-out infinite;
}
@keyframes scrollLine {
  0%    { transform: scaleY(0); transform-origin: top; }
  50%   { transform: scaleY(1); transform-origin: top; }
  50.01%{ transform: scaleY(1); transform-origin: bottom; }
  100%  { transform: scaleY(0); transform-origin: bottom; }
}

/* ===== PHILOSOPHY ===== */
.philosophy-split {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 36px;
  align-items: center;
  max-width: 880px;
  margin: 0 auto 40px;
}
.philosophy-arrow { font-size: 1.75rem; color: var(--gold); font-weight: 300; text-align: center; }

.philosophy-side {
  padding: 40px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}
.philosophy-side.fake { background: white; }
.philosophy-side.true { background: var(--bg-dark); color: white; border-color: transparent; }

.philo-label {
  font-family: 'Noto Serif SC', serif;
  font-size: 2.75rem; font-weight: 700;
  color: var(--gold); line-height: 1; margin-bottom: 10px;
}
.philosophy-side h3 {
  font-family: 'Noto Serif SC', serif;
  font-size: 1.125rem; margin-bottom: 6px;
}
.philosophy-side.true h3 { color: white; }

.philosophy-side p { font-size: 0.9375rem; color: var(--text-2); }
.philosophy-side.true p { color: rgba(255,255,255,0.6); }

.philo-note { font-size: 0.875rem !important; line-height: 1.9; margin-top: 8px; }

.philo-list { margin-top: 16px; }
.philo-list li {
  padding: 8px 0;
  border-bottom: 1px solid rgba(255,255,255,0.07);
  font-size: 0.9375rem;
  color: rgba(255,255,255,0.75);
  display: flex; gap: 10px; align-items: baseline;
}
.philo-list li:last-child { border-bottom: none; }
.philo-list li span { font-weight: 600; color: var(--gold); white-space: nowrap; }

.philosophy-coda {
  text-align: center;
  font-family: 'Noto Serif SC', serif;
  font-size: 1.0625rem;
  color: var(--text-2);
  font-style: italic;
}

/* ===== TEACHERS ===== */
.teachers-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  max-width: 1100px;
  margin: 0 auto;
}

.teacher-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.09);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  height: 100%;
}

.teacher-img-wrap {
  aspect-ratio: 4/3; overflow: hidden;
  background: rgba(255,255,255,0.04);
}
.teacher-img-wrap img {
  width: 100%; height: 100%;
  object-fit: cover; object-position: top center;
  transition: transform 0.4s ease;
}
.teacher-photo-zimo { object-position: center 16% !important; }
.teacher-photo-changqing { object-position: center 18% !important; }
.teacher-photo-jiang { object-position: center 20% !important; }
.teacher-card:hover .teacher-img-wrap img { transform: scale(1.03); }

.teacher-info {
  padding: 28px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.teacher-role-tag {
  display: inline-block;
  font-size: 0.72rem; font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--gold);
  background: rgba(184,137,42,0.14);
  padding: 3px 10px; border-radius: 4px;
  margin-bottom: 12px;
}

.teacher-card h3 {
  font-family: 'Noto Serif SC', serif;
  font-size: 1.3rem; font-weight: 700;
  color: white; margin-bottom: 6px;
}
.teacher-bio {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.45);
  margin-bottom: 12px;
  min-height: 4.6em;
}
.teacher-quote {
  font-size: 0.9375rem;
  color: rgba(255,255,255,0.78);
  line-height: 1.85; margin-bottom: 16px;
  padding-left: 14px;
  border-left: 2px solid var(--gold);
  min-height: 6.9em;
}
.teacher-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.teacher-tags li {
  font-size: 0.8rem;
  padding: 3px 10px;
  border: 1px solid rgba(255,255,255,0.14);
  border-radius: 100px;
  color: rgba(255,255,255,0.55);
}
.teacher-link {
  display: inline-block;
  width: fit-content;
  margin-top: 18px;
  color: var(--gold-lt);
  font-size: 0.875rem;
  text-decoration: none;
  border-bottom: 1px solid rgba(240,228,192,0.4);
}
.teacher-link:hover { color: white; border-color: white; }
.teacher-more-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
  margin-top: 34px;
}
.teacher-more-links a {
  color: rgba(255,255,255,0.78);
  text-decoration: none;
  border: 1px solid rgba(255,255,255,0.14);
  border-radius: 8px;
  padding: 9px 16px;
  font-size: 0.875rem;
}
.teacher-more-links a:hover {
  color: white;
  border-color: var(--gold);
  background: rgba(184,137,42,0.12);
}

/* ===== TIMELINE ===== */
.timeline { max-width: 800px; margin: 0 auto; position: relative; }
.timeline::before {
  content: '';
  position: absolute;
  left: 50px; top: 0; bottom: 0;
  width: 1px;
  background: var(--border);
}

.timeline-item {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 28px;
  margin-bottom: 36px;
  position: relative;
}
.timeline-item:last-child { margin-bottom: 0; }

.timeline-day {
  display: flex; flex-direction: column;
  align-items: center; justify-content: flex-start;
  padding-top: 4px; position: relative; z-index: 1;
  font-family: 'Noto Serif SC', serif;
  font-size: 1.875rem; font-weight: 700;
  color: var(--text-3);
  background: white;
  width: 60px; margin: 0 auto;
  border: 2px solid var(--border);
  border-radius: 10px;
  padding: 8px 6px;
  line-height: 1; text-align: center;
}
.timeline-day span {
  font-size: 0.6rem; font-weight: 700;
  letter-spacing: 0.12em; color: var(--text-3);
  display: block; line-height: 1; margin-bottom: 2px;
}
.timeline-day.gold { color: var(--gold); border-color: var(--gold); }
.timeline-day.gold span { color: var(--gold); }

.timeline-content {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px 30px;
  transition: box-shadow var(--ease);
}
.timeline-content:hover { box-shadow: var(--shadow); }
.timeline-content.highlight { border-color: var(--gold); background: #FFFAF0; }

.timeline-phase {
  font-size: 0.72rem; font-weight: 700;
  letter-spacing: 0.14em; color: var(--gold);
  margin-bottom: 5px;
}
.timeline-content h3 {
  font-family: 'Noto Serif SC', serif;
  font-size: 1.2rem; font-weight: 700;
  color: var(--text); margin-bottom: 6px;
}
.timeline-theme {
  font-size: 0.9rem; color: var(--text-2);
  font-weight: 500; margin-bottom: 6px;
}
.timeline-content > p:not(.timeline-theme) {
  font-size: 0.875rem; color: var(--text-3); line-height: 1.75;
}
.timeline-output {
  margin-top: 12px; padding: 8px 14px;
  background: var(--bg-warm); border-radius: 6px;
  font-size: 0.8125rem; color: var(--text-2);
}

/* ===== DELIVERABLES ===== */
.deliverables-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.deliver-card {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 24px;
  transition: box-shadow var(--ease), transform var(--ease);
}
.deliver-card:hover { box-shadow: var(--shadow); transform: translateY(-2px); }

.deliver-num {
  font-family: 'Noto Serif SC', serif;
  font-size: 2.25rem; font-weight: 700;
  color: var(--gold-lt); line-height: 1;
  margin-bottom: 16px;
}
.deliver-card h3 {
  font-family: 'Noto Serif SC', serif;
  font-size: 1.1rem; font-weight: 700;
  color: var(--text); margin-bottom: 10px;
}
.deliver-card p { font-size: 0.875rem; color: var(--text-2); line-height: 1.9; }

/* ===== TOOLS ===== */
.tools-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  max-width: 840px;
  margin: 0 auto;
}
.tool-item {
  background: white; padding: 40px 34px; text-align: center;
  transition: background var(--ease);
}
.tool-item:hover { background: var(--bg-warm); }
.tool-name {
  font-family: 'Noto Serif SC', serif;
  font-size: 1.625rem; font-weight: 700;
  color: var(--text); margin-bottom: 8px;
}
.tool-role { font-size: 0.875rem; font-weight: 600; color: var(--gold); margin-bottom: 10px; }
.tool-item p { font-size: 0.875rem; color: var(--text-2); line-height: 1.8; }

/* ===== PROMISES ===== */
.promises-split {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 24px; max-width: 880px; margin: 0 auto;
}
.promise-col {
  background: white; border: 1px solid var(--border);
  border-radius: var(--radius); padding: 36px;
}
.promise-col h3 {
  font-family: 'Noto Serif SC', serif;
  font-size: 1.2rem; margin-bottom: 22px; color: var(--text);
}
.promise-col ul { display: flex; flex-direction: column; gap: 13px; }
.promise-col li {
  font-size: 0.9375rem; color: var(--text-2);
  line-height: 1.75; padding-left: 20px; position: relative;
}
.promise-col.yes li::before { content: '✓'; position: absolute; left: 0; color: #16a34a; font-weight: 700; }
.promise-col.no  li::before { content: '✗'; position: absolute; left: 0; color: #dc2626; font-weight: 700; }

/* ===== PRICING ===== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(180px, 1fr));
  gap: 18px;
  max-width: 960px;
  margin: 0 auto 28px;
  align-items: start;
  justify-content: center;
}

.price-card {
  background: white; border: 1px solid var(--border);
  border-radius: var(--radius); padding: 28px 20px;
  text-align: center; position: relative;
}
.price-card.featured {
  border-color: var(--gold); background: #FFFDF5;
  padding-top: 44px; box-shadow: var(--shadow-lg);
}
.price-badge {
  position: absolute; top: -1px; left: 50%; transform: translateX(-50%);
  background: var(--gold); color: white;
  font-size: 0.72rem; font-weight: 700; letter-spacing: 0.05em;
  padding: 4px 16px; border-radius: 0 0 8px 8px;
}
.price-name { font-size: 0.875rem; color: var(--text-3); margin-bottom: 10px; }
.price-amount {
  font-family: 'Noto Serif SC', serif;
  font-size: 1.875rem; font-weight: 700;
  color: var(--text); line-height: 1.2; margin-bottom: 8px;
}
.price-card.featured .price-amount { color: var(--gold-dk); font-size: 2.125rem; }
.price-desc { font-size: 0.8rem; color: var(--text-3); margin-bottom: 16px; }
.price-cta {
  display: block; text-decoration: none;
  background: var(--gold); color: white;
  font-size: 0.875rem; font-weight: 600;
  padding: 10px; border-radius: 6px;
  transition: background var(--ease);
}
.price-cta:hover { background: var(--gold-dk); }

.pricing-includes {
  text-align: center; max-width: 680px; margin: 0 auto;
  padding: 18px 24px; background: var(--bg-warm); border-radius: 8px;
}
.pricing-includes p { font-size: 0.875rem; color: var(--text-2); line-height: 1.85; }

/* ===== FAQ ===== */
.faq-list {
  border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden;
}
.faq-item { border-bottom: 1px solid var(--border); }
.faq-item:last-child { border-bottom: none; }

.faq-q {
  width: 100%; background: white; border: none;
  padding: 22px 24px;
  font-size: 1rem; font-family: inherit;
  color: var(--text); text-align: left;
  cursor: pointer;
  display: flex; justify-content: space-between; align-items: center; gap: 16px;
  transition: background var(--ease);
}
.faq-q:hover, .faq-q.active { background: var(--bg-warm); }

.faq-icon {
  font-size: 1.375rem; font-weight: 300;
  color: var(--gold); flex-shrink: 0;
  transition: transform var(--ease); line-height: 1;
}
.faq-q.active .faq-icon { transform: rotate(45deg); }

.faq-a { display: none; padding: 0 24px 22px; background: var(--bg-warm); }
.faq-a.open { display: block; }
.faq-a p { font-size: 0.9375rem; color: var(--text-2); line-height: 1.95; }

/* ===== CONTACT ===== */
.contact-section { background: var(--bg-dark); color: white; }

.contact-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 48px; max-width: 840px; margin: 0 auto; align-items: start;
}

.contact-item {
  display: flex; gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid rgba(255,255,255,0.07);
  font-size: 0.9375rem;
}
.contact-item:last-child { border-bottom: none; }
.contact-label { font-weight: 600; color: var(--gold); min-width: 48px; flex-shrink: 0; }
.contact-item span:last-child { color: rgba(255,255,255,0.78); }

.urgency-card {
  background: var(--gold); border-radius: var(--radius);
  padding: 40px 32px; text-align: center; color: white;
}
.urgency-tag { font-size: 0.78rem; font-weight: 600; letter-spacing: 0.1em; opacity: 0.85; margin-bottom: 12px; }
.urgency-price {
  font-family: 'Noto Serif SC', serif;
  font-size: 2.75rem; font-weight: 700; line-height: 1.1; margin-bottom: 4px;
}
.urgency-deadline {
  font-family: 'Noto Serif SC', serif;
  font-size: 1.0625rem; margin-bottom: 14px; opacity: 0.9;
}
.urgency-note { font-size: 0.8125rem; opacity: 0.75; margin-bottom: 20px; }
.contact-cta-note {
  font-size: 0.875rem;
  padding-top: 16px;
  border-top: 1px solid rgba(255,255,255,0.25);
  opacity: 0.88;
}
.contact-qr {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 18px;
  align-items: center;
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid rgba(255,255,255,0.25);
}
.contact-qr img {
  width: 80px;
  border-radius: 8px;
  background: white;
  padding: 5px;
}
.contact-qr span {
  color: rgba(255,255,255,0.82);
  font-size: 0.875rem;
  line-height: 1.8;
  text-align: left;
}

/* ===== SUBPAGES ===== */
.subpage-hero {
  background: var(--bg-dark);
  color: white;
  padding: 140px 0 84px;
}
.subpage-hero .section-title {
  color: white;
  max-width: 760px;
}
.subpage-hero .section-intro {
  margin-left: 0;
  color: rgba(255,255,255,0.68);
  max-width: 720px;
}
.subpage-nav {
  margin-top: 30px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.subpage-nav a {
  color: rgba(255,255,255,0.78);
  text-decoration: none;
  border: 1px solid rgba(255,255,255,0.16);
  border-radius: 8px;
  padding: 9px 16px;
  font-size: 0.875rem;
}
.subpage-nav a:hover { color: white; border-color: var(--gold); }
.content-block {
  max-width: 860px;
  margin: 0 auto 54px;
}
.content-block h2 {
  font-family: 'Noto Serif SC', serif;
  font-size: 1.8rem;
  line-height: 1.35;
  margin-bottom: 18px;
}
.content-block h3 {
  font-family: 'Noto Serif SC', serif;
  font-size: 1.2rem;
  margin: 28px 0 12px;
}
.content-block p {
  color: var(--text-2);
  line-height: 2;
  margin-bottom: 14px;
}
.content-block ul {
  display: grid;
  gap: 10px;
  margin: 18px 0;
}
.content-block li {
  color: var(--text-2);
  line-height: 1.85;
  padding-left: 18px;
  position: relative;
}
.content-block li::before {
  content: '•';
  position: absolute;
  left: 0;
  color: var(--gold);
}
.quote-panel {
  border-left: 3px solid var(--gold);
  background: var(--bg-warm);
  padding: 22px 26px;
  border-radius: 0 10px 10px 0;
  font-family: 'Noto Serif SC', serif;
  color: var(--text);
  line-height: 1.9;
}

.jiang-intro-section { background: linear-gradient(180deg, var(--white) 0%, var(--bg) 100%); }
.jiang-profile {
  display: grid;
  grid-template-columns: minmax(280px, 420px) 1fr;
  gap: 48px;
  align-items: center;
  margin-bottom: 72px;
}
.jiang-portrait-wrap {
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  background: var(--bg-warm);
}
.jiang-portrait {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  object-position: center 28%;
}
.jiang-profile-copy h2 {
  font-family: 'Noto Serif SC', serif;
  font-size: 2rem;
  line-height: 1.35;
  margin-bottom: 18px;
}
.jiang-profile-copy p {
  color: var(--text-2);
  line-height: 2;
  margin-bottom: 14px;
}
.jiang-keywords {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}
.jiang-keywords span {
  border: 1px solid var(--border);
  border-radius: 999px;
  background: white;
  color: var(--gold-dk);
  font-size: 0.875rem;
  padding: 7px 13px;
}
.teacher-detail-profile {
  display: grid;
  grid-template-columns: minmax(280px, 380px) 1fr;
  gap: 44px;
  align-items: center;
  max-width: 960px;
  margin: 0 auto 68px;
}
.teacher-detail-photo-wrap {
  border-radius: 12px;
  overflow: hidden;
  background: var(--bg-warm);
  box-shadow: var(--shadow-lg);
}
.teacher-detail-photo {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
}
.teacher-detail-photo-zimo { object-position: center 18%; }
.teacher-detail-photo-changqing { object-position: center 14%; }
.teacher-detail-copy h2 {
  font-family: 'Noto Serif SC', serif;
  font-size: 2rem;
  line-height: 1.35;
  margin-bottom: 14px;
}
.teacher-detail-copy p {
  color: var(--text-2);
  line-height: 2;
  margin-bottom: 14px;
}
.jiang-fact-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 54px;
}
.jiang-fact-card {
  background: white;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 22px;
  box-shadow: var(--shadow);
}
.jiang-fact-card strong {
  display: block;
  font-family: 'Noto Serif SC', serif;
  font-size: 1.125rem;
  margin-bottom: 10px;
}
.jiang-fact-card span {
  color: var(--text-2);
  font-size: 0.9375rem;
  line-height: 1.85;
}

/* ===== RESEARCH PAGE ===== */
.dragon-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 40px;
}
.dragon-card {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 20px;
  transition: box-shadow var(--ease), transform var(--ease);
}
.dragon-card:hover { box-shadow: var(--shadow); transform: translateY(-2px); }
.dragon-index {
  font-family: 'Noto Serif SC', serif;
  font-size: 2rem; font-weight: 700;
  color: var(--gold-lt); line-height: 1;
  margin-bottom: 12px;
}
.dragon-name {
  font-family: 'Noto Serif SC', serif;
  font-size: 1.1rem; font-weight: 700;
  color: var(--text); margin-bottom: 4px;
}
.dragon-school { font-size: 0.8rem; color: var(--text-3); margin-bottom: 10px; }
.dragon-achieve { font-size: 0.875rem; font-weight: 600; color: var(--gold); margin-bottom: 8px; }
.dragon-card p { font-size: 0.8125rem; color: var(--text-2); line-height: 1.8; }
.research-stats {
  display: flex; gap: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin: 40px 0;
}
.research-stat {
  flex: 1;
  padding: 28px 20px; text-align: center;
  border-right: 1px solid var(--border);
}
.research-stat:last-child { border-right: none; }
.research-stat strong {
  display: block;
  font-family: 'Noto Serif SC', serif;
  font-size: 2rem; font-weight: 700;
  color: var(--gold); line-height: 1;
  margin-bottom: 8px;
}
.research-stat span { font-size: 0.8rem; color: var(--text-3); }
@media (max-width: 768px) {
  .dragon-grid { grid-template-columns: 1fr 1fr; }
  .research-stats { flex-wrap: wrap; }
  .research-stat { border-right: 1px solid var(--border); min-width: 50%; }
}
@media (max-width: 480px) {
  .dragon-grid { grid-template-columns: 1fr; }
}

/* ===== FOOTER ===== */
.footer {
  background: #080808; padding: 64px 0 40px;
  text-align: center; color: white;
}
.footer-slogan {
  font-family: 'Noto Serif SC', serif;
  font-size: 1.5rem; font-weight: 700;
  margin-bottom: 12px; color: var(--gold);
}
.footer-tagline { font-size: 0.9375rem; color: rgba(255,255,255,0.55); line-height: 2; margin-bottom: 24px; }
/* ===== VIDEO GALLERY ===== */
.video-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 28px;
  max-width: 1040px;
  margin: 0 auto;
}
.video-card {
  flex: 1 1 420px;
  max-width: 480px;
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: box-shadow var(--ease), transform var(--ease);
}
.video-card:hover { box-shadow: var(--shadow); transform: translateY(-2px); }
.video-wrap {
  position: relative;
  aspect-ratio: 16/9;
  background: var(--bg-dark);
}
.video-wrap video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.video-duration {
  position: absolute;
  bottom: 10px;
  right: 10px;
  background: rgba(0,0,0,0.72);
  color: white;
  font-size: 0.75rem;
  font-weight: 500;
  padding: 3px 8px;
  border-radius: 4px;
}
.video-card h3 {
  font-family: 'Noto Serif SC', serif;
  font-size: 1.1rem;
  padding: 20px 22px 6px;
  color: var(--text);
}
.video-card p {
  font-size: 0.875rem;
  color: var(--text-2);
  padding: 0 22px 22px;
  line-height: 1.7;
}
.zhongxu-video-card {
  max-width: 860px;
  margin: 0 auto 54px;
}

/* ===== FOOTER ===== */
.footer-orgs {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0 16px;
  padding: 14px 0;
  margin-bottom: 24px;
  border-top: 1px solid rgba(255,255,255,0.1);
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.footer-org-item {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.5);
}
.footer-org-item a {
  color: rgba(255,255,255,0.75);
  text-decoration: none;
  transition: color var(--ease);
}
.footer-org-item a:hover { color: var(--gold); }
.footer-org-divider {
  color: rgba(255,255,255,0.2);
  font-size: 1rem;
  line-height: 1;
}
.footer-meta {
  display: flex; gap: 20px; justify-content: center;
  font-size: 0.72rem; color: rgba(255,255,255,0.18);
}
.footer-preview { margin-bottom: 28px; }
.footer-preview a {
  display: inline-flex; align-items: center; gap: 10px; flex-wrap: wrap; justify-content: center;
  padding: 12px 22px;
  border: 1px solid rgba(212,175,55,0.35);
  border-radius: 100px;
  background: rgba(212,175,55,0.08);
  color: var(--gold);
  text-decoration: none;
  font-size: 0.875rem;
  transition: background .2s, border-color .2s;
}
.footer-preview a:hover { background: rgba(212,175,55,0.14); border-color: var(--gold); }
.footer-preview .preview-label { color: rgba(255,255,255,0.5); font-size: 0.75rem; }
.footer-preview strong { color: var(--gold); font-weight: 600; }
.footer-preview .preview-arrow { color: var(--gold); }

/* ===== SCROLL REVEAL ===== */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity 0.65s ease, transform 0.65s ease; }
.reveal.in-view { opacity: 1; transform: translateY(0); }

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .deliverables-grid { grid-template-columns: 1fr 1fr; }
  .pricing-grid { grid-template-columns: 1fr 1fr; }
  .teacher-bio, .teacher-quote { min-height: auto; }
}

@media (max-width: 768px) {
  .section { padding: 64px 0; }
  .section-title { font-size: 1.875rem; }
  .section-header { margin-bottom: 44px; }

  .hero-title { font-size: 2.75rem; }
  .hero-sub   { font-size: 1.375rem; }
  .hero-stats { flex-wrap: wrap; border: none; gap: 12px; }
  .stat-div   { display: none; }
  .stat { padding: 8px 16px; border: 1px solid rgba(255,255,255,0.1); border-radius: 8px; }
  .hero-actions { flex-direction: column; }
  .btn-gold, .btn-ghost { width: 100%; text-align: center; }

  .philosophy-split { grid-template-columns: 1fr; gap: 20px; }
  .philosophy-arrow { text-align: center; transform: rotate(90deg); font-size: 1.5rem; }

  .teachers-grid { grid-template-columns: 1fr; }

  .timeline::before { left: 28px; }
  .timeline-item { grid-template-columns: 56px 1fr; gap: 18px; }
  .timeline-day { width: 46px; font-size: 1.5rem; padding: 6px 4px; }

  .deliverables-grid { grid-template-columns: 1fr 1fr; }
  .tools-row { grid-template-columns: 1fr; }
  .promises-split { grid-template-columns: 1fr; }
  .jiang-profile { grid-template-columns: 1fr; gap: 32px; }
  .teacher-detail-profile { grid-template-columns: 1fr; gap: 32px; }
  .jiang-fact-grid { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .contact-qr { grid-template-columns: 72px 1fr; }
  .contact-qr img { width: 72px; }

  .nav-links { display: none; }
  .nav-cta   { display: none; }
  .nav-toggle {
    display: flex; flex-direction: column; gap: 5px;
    background: none; border: none; cursor: pointer; padding: 4px;
    margin-left: auto;
  }
  .nav-toggle span {
    display: block; width: 22px; height: 2px;
    background: white; border-radius: 2px;
    transition: background var(--ease);
  }
  .nav.scrolled .nav-toggle span { background: var(--text); }
}

@media (max-width: 480px) {
  .hero-title { font-size: 2.125rem; }
  .deliverables-grid { grid-template-columns: 1fr; }
  .pricing-grid { grid-template-columns: 1fr; }
  .jiang-profile-copy h2 { font-size: 1.625rem; }
  .teacher-detail-copy h2 { font-size: 1.625rem; }
  .jiang-fact-grid { grid-template-columns: 1fr; }
  .contact-qr { grid-template-columns: 1fr; }
  .contact-qr span { text-align: center; }
}