/* ============================================
   首页样式
   ============================================ */

/* ---------- 初心使命愿景三栏 ---------- */
.purposes-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

.purpose-card {
  text-align: center;
  padding: var(--space-xl) var(--space-md);
  background-color: var(--color-card-rice);
  border: 1px solid var(--color-line-light);
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
}

.purpose-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-line-medium);
}

.purpose-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--space-md);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background-color: var(--color-rice-paper);
  border: 1px solid var(--color-line-light);
}

.purpose-title {
  font-size: var(--fs-xl);
  color: var(--color-ink);
  font-family: var(--font-title);
  letter-spacing: 0.3em;
  margin-bottom: var(--space-md);
  position: relative;
  display: inline-block;
  padding-bottom: var(--space-sm);
}

.purpose-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 30px;
  height: 2px;
  background-color: var(--color-ochre);
}

.purpose-desc {
  font-size: var(--fs-base);
  line-height: 1.9;
  color: var(--color-ink-light);
  margin-bottom: var(--space-sm);
}

.purpose-desc-small {
  font-size: var(--fs-sm);
  color: var(--color-ink-muted);
  font-style: italic;
}

/* ---------- 正四面体基准法则 ---------- */
.tetrahedron-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xl);
  align-items: center;
}

.tetrahedron-visual {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: var(--space-lg);
}

.tetrahedron-svg {
  max-width: 400px;
  width: 100%;
  height: auto;
  filter: drop-shadow(0 8px 24px rgba(49, 37, 27, 0.1));
}

.tetra-label circle {
  transition: all var(--transition-base);
}

.tetra-label:hover circle {
  r: 32;
  filter: drop-shadow(0 4px 12px rgba(184, 52, 44, 0.3));
}

.tetra-title {
  font-size: var(--fs-2xl);
  font-family: var(--font-title);
  color: var(--color-ink);
  margin-bottom: var(--space-sm);
  letter-spacing: 0.1em;
}

.tetra-quote {
  font-size: var(--fs-md);
  color: var(--color-seal-red);
  font-family: var(--font-title);
  font-style: italic;
  margin-bottom: var(--space-md);
  letter-spacing: 0.15em;
}

.tetra-description {
  font-size: var(--fs-base);
  line-height: 2;
  color: var(--color-ink-light);
  margin-bottom: var(--space-lg);
}

.tetra-description p {
  margin-bottom: var(--space-sm);
}

.tetra-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-sm) var(--space-md);
  margin-bottom: var(--space-lg);
}

.tetra-feature {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  font-size: var(--fs-sm);
  color: var(--color-ink-light);
  padding-top: 2px;
}
.tetra-feature-main {
  font-size: var(--fs-base);
  color: var(--color-ink);
  font-weight: 500;
  line-height: 1.5;
}
.tetra-feature-sub {
  font-size: var(--fs-xs);
  color: var(--color-ochre);
  line-height: 1.6;
  margin-top: 2px;
}

.tetra-feature-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
  margin-top: 7px;
}

/* ---------- 八大评估工具 ---------- */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}

.tool-card {
  background-color: var(--color-card-rice);
  border: 1px solid var(--color-line-light);
  border-radius: var(--radius-md);
  padding: var(--space-lg) var(--space-md);
  transition: all var(--transition-base);
  cursor: pointer;
}

.tool-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-ochre);
}

.tool-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-md);
}

.tool-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background-color: var(--color-rice-paper);
  border: 1px solid var(--color-line-light);
}

.tool-tag {
  font-size: var(--fs-xs);
  color: var(--color-ochre);
  padding: 0.25rem 0.5rem;
  border: 1px solid var(--color-ochre);
  border-radius: 2px;
  letter-spacing: 0.05em;
}

.tool-tag-accent {
  color: var(--color-seal-red);
  border-color: var(--color-seal-red);
}

.tool-name {
  font-size: var(--fs-md);
  font-family: var(--font-title);
  color: var(--color-ink);
  margin-bottom: 0.5rem;
  letter-spacing: 0.05em;
}

.tool-desc {
  font-size: var(--fs-sm);
  color: var(--color-ink-muted);
  line-height: 1.7;
}

.tool-card-highlight {
  border-color: var(--color-seal-red);
  background: linear-gradient(135deg, var(--color-card-rice) 0%, #FFFBF5 100%);
  position: relative;
}

.tool-card-highlight::before {
  content: '';
  position: absolute;
  top: -1px;
  right: -1px;
  width: 0;
  height: 0;
  border-top: 24px solid var(--color-seal-red);
  border-left: 24px solid transparent;
  border-top-right-radius: var(--radius-md);
}

.tool-link {
  display: inline-block;
  margin-top: var(--space-sm);
  font-size: var(--fs-sm);
  color: var(--color-seal-red);
  font-weight: 500;
  letter-spacing: 0.05em;
}

.assessment-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-xl);
  padding: var(--space-lg) var(--space-xl);
  background: linear-gradient(135deg, var(--color-deep-blue) 0%, #2a4d7a 100%);
  border-radius: var(--radius-md);
  color: var(--color-white);
}

.assessment-cta-content h3 {
  color: var(--color-white);
  font-size: var(--fs-lg);
  margin-bottom: 0.5rem;
  letter-spacing: 0.1em;
  font-family: var(--font-title);
}

.assessment-cta-content p {
  color: rgba(255, 255, 255, 0.7);
  font-size: var(--fs-sm);
  letter-spacing: 0.05em;
}

/* ---------- 六份阐释文稿 ---------- */
.papers-scroll {
  overflow-x: auto;
  padding-bottom: var(--space-md);
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: var(--color-line-medium) var(--color-rice-paper);
}

.papers-scroll::-webkit-scrollbar {
  height: 6px;
}

.papers-scroll::-webkit-scrollbar-track {
  background: var(--color-rice-paper);
  border-radius: 3px;
}

.papers-scroll::-webkit-scrollbar-thumb {
  background: var(--color-line-medium);
  border-radius: 3px;
}

.papers-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(200px, 1fr));
  gap: var(--space-md);
  min-width: 0;
}

.paper-scroll-card {
  background-color: var(--color-white);
  border-radius: var(--radius-sm);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
  cursor: pointer;
  display: flex;
  flex-direction: column;
}

.paper-scroll-card:hover {
  transform: translateY(-8px) rotate(-0.5deg);
  box-shadow: var(--shadow-lg);
}

.paper-cover {
  padding: var(--space-xl) var(--space-md);
  text-align: center;
  color: var(--color-white);
  min-height: 200px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
}

.paper-cover::before {
  content: '';
  position: absolute;
  inset: 12px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  pointer-events: none;
}

.paper-cover-red { background: linear-gradient(160deg, #B8342C 0%, #8B2A24 100%); }
.paper-cover-orange { background: linear-gradient(160deg, #E8743B 0%, #C96F3D 100%); }
.paper-cover-green { background: linear-gradient(160deg, #7E9F7A 0%, #5F856A 100%); }
.paper-cover-blue { background: linear-gradient(160deg, #1E3A5F 0%, #152B47 100%); }
.paper-cover-ochre { background: linear-gradient(160deg, #C96F3D 0%, #A85830 100%); }
.paper-cover-dark { background: linear-gradient(160deg, #31251B 0%, #1A1510 100%); }

.paper-number {
  font-size: var(--fs-lg);
  font-family: var(--font-sans);
  opacity: 0.6;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-sm);
}

.paper-title-main {
  font-size: var(--fs-lg);
  font-family: var(--font-title);
  color: var(--color-white);
  margin-bottom: 0.5rem;
  letter-spacing: 0.1em;
  line-height: 1.5;
}

.paper-sub {
  font-size: var(--fs-sm);
  opacity: 0.75;
  letter-spacing: 0.15em;
}

.paper-footer {
  padding: var(--space-sm) var(--space-md);
  background-color: var(--color-card-rice);
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--color-line-light);
}

.paper-cat {
  font-size: var(--fs-xs);
  color: var(--color-ink-muted);
  letter-spacing: 0.05em;
}

.paper-seal {
  width: 28px;
  height: 28px;
  display: block;
  flex-shrink: 0;
  transform: rotate(-3deg);
}

.paper-seal img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
  opacity: 0.85;
}

/* ---------- 以诚哲思/观察 ---------- */
.insights-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
}

.insights-col-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-sm);
  border-bottom: 2px solid var(--color-ochre);
}

.insights-col-title {
  font-size: var(--fs-xl);
  font-family: var(--font-title);
  color: var(--color-ink);
  letter-spacing: 0.15em;
}

.insights-more {
  font-size: var(--fs-sm);
  color: var(--color-ochre);
  letter-spacing: 0.05em;
}

.insights-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.insight-item {
  display: block;
  padding: var(--space-md);
  background-color: var(--color-card-rice);
  border: 1px solid var(--color-line-light);
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  text-decoration: none;
}

.insight-item:hover {
  border-color: var(--color-ochre);
  transform: translateX(4px);
  box-shadow: var(--shadow-sm);
}

.insight-date {
  font-size: var(--fs-xs);
  color: var(--color-ink-muted);
  letter-spacing: 0.1em;
  font-family: var(--font-sans);
}

.insight-title {
  font-size: var(--fs-base);
  font-family: var(--font-title);
  color: var(--color-ink);
  margin: 0.5rem 0;
  letter-spacing: 0.05em;
  line-height: 1.5;
}

.insight-excerpt {
  font-size: var(--fs-sm);
  color: var(--color-ink-light);
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ---------- 价值观徽章 ---------- */
.values-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
}

.value-badge {
  text-align: center;
  padding: var(--space-lg) var(--space-sm);
}

.value-badge-inner {
  width: 100px;
  height: 100px;
  margin: 0 auto var(--space-md);
  border: 2px solid var(--color-seal-red);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  position: relative;
  transform: rotate(-3deg);
  transition: all var(--transition-base);
  background-color: var(--color-card-rice);
}

.value-badge-inner::before {
  content: '';
  position: absolute;
  inset: 6px;
  border: 1px solid rgba(184, 52, 44, 0.3);
  border-radius: 1px;
}

.value-badge:hover .value-badge-inner {
  transform: rotate(0deg) scale(1.05);
  box-shadow: 0 8px 24px rgba(184, 52, 44, 0.15);
}

.value-char {
  font-family: var(--font-title);
  font-size: var(--fs-xl);
  font-weight: 600;
  color: var(--color-seal-red);
  line-height: 1;
}

.value-char-sub {
  font-family: var(--font-title);
  font-size: var(--fs-sm);
  color: var(--color-seal-red);
  margin-top: 2px;
}

.value-name {
  font-size: var(--fs-lg);
  font-family: var(--font-title);
  color: var(--color-ink);
  margin-bottom: var(--space-sm);
  letter-spacing: 0.2em;
}

.value-desc {
  font-size: var(--fs-sm);
  color: var(--color-ink-light);
  line-height: 1.8;
  text-align: left;
  padding: 0 var(--space-sm);
}

/* ---------- 合作方向 ---------- */
.coop-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}

.coop-grid .coop-card:nth-child(4) {
  grid-column: 1 / 2;
}

.coop-grid .coop-card:nth-child(5) {
  grid-column: 2 / 3;
}

.coop-card {
  position: relative;
  padding: var(--space-lg) var(--space-md) var(--space-lg) 5rem;
  background-color: var(--color-card-rice);
  border: 1px solid var(--color-line-light);
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
}

.coop-card:hover {
  border-color: var(--color-ochre);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.coop-num {
  position: absolute;
  left: var(--space-md);
  top: var(--space-lg);
  font-family: var(--font-sans);
  font-size: var(--fs-2xl);
  font-weight: 300;
  color: var(--color-ochre);
  opacity: 0.3;
  line-height: 1;
}

.coop-title {
  font-size: var(--fs-md);
  font-family: var(--font-title);
  color: var(--color-ink);
  margin-bottom: 0.5rem;
  letter-spacing: 0.05em;
}

.coop-desc {
  font-size: var(--fs-sm);
  color: var(--color-ink-light);
  line-height: 1.7;
}

/* ---------- 橙色 CTA 条带 ---------- */
.section-cta-band {
  background: linear-gradient(135deg, var(--color-function-orange) 0%, #D65A2B 100%);
  padding: var(--space-2xl) 0;
  color: var(--color-white);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.section-cta-band::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -10%;
  width: 120%;
  height: 200%;
  background:
    radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.05) 0%, transparent 50%),
    radial-gradient(circle at 80% 30%, rgba(255, 255, 255, 0.03) 0%, transparent 40%);
  pointer-events: none;
}

.cta-band-content {
  position: relative;
  z-index: 1;
}

.cta-band-title {
  font-size: var(--fs-2xl);
  font-family: var(--font-title);
  color: var(--color-white);
  margin-bottom: var(--space-sm);
  letter-spacing: 0.15em;
}

.cta-band-desc {
  color: rgba(255, 255, 255, 0.85);
  font-size: var(--fs-md);
  margin-bottom: var(--space-lg);
  letter-spacing: 0.05em;
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .tools-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .values-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 968px) {
  .tetrahedron-wrapper {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .tetrahedron-visual {
    order: -1;
  }

  .purposes-grid {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }

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

  .coop-grid .coop-card:nth-child(4),
  .coop-grid .coop-card:nth-child(5) {
    grid-column: auto;
  }
}

@media (max-width: 768px) {
  .tools-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
  }

  .tool-card {
    padding: var(--space-md) 1rem;
  }

  .papers-grid {
    grid-template-columns: repeat(6, 180px);
  }

  .paper-cover {
    padding: var(--space-lg) var(--space-sm);
    min-height: 160px;
  }

  .paper-title-main {
    font-size: var(--fs-base);
  }

  .insights-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .assessment-cta {
    flex-direction: column;
    text-align: center;
    padding: var(--space-lg) var(--space-md);
  }

  .cta-band-title {
    font-size: var(--fs-xl);
  }

  .cta-band-desc {
    font-size: var(--fs-base);
  }

  .value-desc {
    text-align: center;
  }
}

@media (max-width: 480px) {
  .tools-grid {
    grid-template-columns: 1fr;
  }

  .values-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
  }

  .value-badge {
    padding: var(--space-sm);
  }

  .value-badge-inner {
    width: 80px;
    height: 80px;
  }

  .value-char {
    font-size: var(--fs-lg);
  }

  .value-name {
    font-size: var(--fs-base);
    letter-spacing: 0.1em;
  }

  .coop-card {
    padding: var(--space-md) var(--space-md) var(--space-md) 4rem;
  }

  .coop-num {
    font-size: var(--fs-xl);
  }

  .tetra-features {
    grid-template-columns: 1fr;
  }
}