/* ============================================================
   入世山房 · 首页样式
   ============================================================ */

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: calc(100vh - 72px);
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--paper-100);
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-svg {
  width: 100%;
  height: 100%;
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: end;
  gap: var(--s-6);
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--s-6) var(--s-4) var(--s-7);
  width: 100%;
}

@media (max-width: 720px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: var(--s-4);
  }
}

.hero-content {
  max-width: 640px;
}

.hero-label {
  display: inline-block;
  font-size: var(--t-xs);
  letter-spacing: 0.5em;
  color: var(--cinnabar);
  margin-bottom: var(--s-3);
  padding-left: 2px;
}

.hero-title {
  font-size: var(--t-4xl);
  font-weight: 500;
  line-height: 1.3;
  letter-spacing: 0.16em;
  color: var(--ink-900);
  margin-bottom: var(--s-4);
}

.hero-title .line-1,
.hero-title .line-2 {
  display: block;
}

.hero-sub {
  font-size: var(--t-md);
  line-height: 2;
  color: var(--ink-700);
  margin-bottom: var(--s-4);
  max-width: 460px;
}

.hero-cta {
  display: flex;
  gap: var(--s-2);
  flex-wrap: wrap;
}

@media (max-width: 720px) {
  .hero-title { font-size: 40px; }
  .hero-title .line-2 { font-size: 32px; }
}

/* 印章 */
.hero-seal-stack {
  align-self: end;
}

.seal-block {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--s-2);
}

.seal-large {
  width: 96px;
  height: 144px;
  background: var(--cinnabar);
  color: var(--paper-50);
  font-family: "Noto Serif SC", serif;
  font-weight: 700;
  font-size: 24px;
  letter-spacing: 0.4em;
  text-align: center;
  line-height: 1.3;
  padding: 8px 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  border-radius: 4px;
  box-shadow:
    inset 0 0 0 2px var(--paper-50),
    inset 0 0 0 4px var(--cinnabar),
    0 8px 24px -8px rgba(184, 51, 42, 0.4);
  writing-mode: horizontal-tb;
}

.seal-meta {
  display: flex;
  flex-direction: column;
  align-items: center;
  font-size: 11px;
  letter-spacing: 0.3em;
  color: var(--cinnabar);
}

/* 滚动提示 */
.scroll-hint {
  position: absolute;
  bottom: var(--s-3);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--s-1);
  z-index: 3;
  color: var(--ink-700);
  text-decoration: none;
}

.scroll-arrow {
  display: block;
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, transparent 0%, var(--ink-700) 40%, var(--ink-700) 100%);
  position: relative;
}

.scroll-arrow::before,
.scroll-arrow::after {
  content: "";
  position: absolute;
  left: 50%;
  width: 6px;
  height: 1px;
  background: var(--ink-700);
  transform-origin: left center;
}

.scroll-arrow::before {
  bottom: 0;
  transform: translateX(-50%) rotate(45deg);
}

.scroll-arrow::after {
  bottom: 0;
  left: calc(50% + 0px);
  transform: translateX(-50%) rotate(-45deg);
}

.scroll-arrow {
  animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.4; transform: translateY(0); }
  50% { opacity: 1; transform: translateY(4px); }
}

.scroll-line {
  width: 1px;
  height: 32px;
  background: linear-gradient(to bottom, var(--ink-500) 0%, transparent 100%);
  position: relative;
  overflow: hidden;
}

.scroll-line::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 8px;
  background: var(--ink-700);
  animation: scrollDown 2s ease-in-out infinite;
}

@keyframes scrollDown {
  0% { transform: translateY(-8px); opacity: 0; }
  50% { opacity: 1; }
  100% { transform: translateY(32px); opacity: 0; }
}

/* ---------- 三段式定位 ---------- */
.triple-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--s-4);
}

@media (max-width: 720px) {
  .triple-grid { grid-template-columns: 1fr; gap: var(--s-3); }
}

.triple-card {
  text-align: center;
  padding: var(--s-4) var(--s-3);
  background: var(--paper-50);
  border: 1px solid var(--paper-200);
  border-radius: 2px;
  transition: all 0.3s;
}

.triple-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-paper);
  border-color: var(--cinnabar);
}

.triple-num {
  font-size: var(--t-2xl);
  font-weight: 500;
  color: var(--cinnabar);
  letter-spacing: 0.1em;
  margin-bottom: var(--s-2);
  font-family: "Noto Serif SC", serif;
}

.triple-card h3 {
  font-size: var(--t-xl);
  font-weight: 500;
  color: var(--ink-900);
  letter-spacing: 0.2em;
  margin-bottom: var(--s-1);
}

.triple-en {
  font-size: var(--t-xs);
  letter-spacing: var(--tracking-base);
  color: var(--ink-500);
  margin-bottom: var(--s-2);
}

.triple-card p {
  font-size: var(--t-sm);
  line-height: 1.9;
  color: var(--ink-700);
}

/* ---------- 四大主题 ---------- */
.theme-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--s-3);
}

@media (max-width: 720px) {
  .theme-grid { grid-template-columns: 1fr; }
}

.theme-card {
  background: var(--paper-50);
  border-radius: 2px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: all 0.3s;
  border: 1px solid var(--paper-200);
}

.theme-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-paper);
}

.theme-art {
  aspect-ratio: 4 / 3;
  overflow: hidden;
}

.theme-art svg {
  width: 100%;
  height: 100%;
  transition: transform 0.6s;
}

.theme-card:hover .theme-art svg {
  transform: scale(1.05);
}

.theme-info {
  padding: var(--s-3);
  border-top: 1px solid var(--paper-200);
}

.theme-info h3 {
  font-size: var(--t-xl);
  font-weight: 500;
  color: var(--ink-900);
  letter-spacing: 0.2em;
  margin-bottom: var(--s-1);
  display: flex;
  align-items: center;
  gap: var(--s-2);
}

.theme-info h3::before {
  content: "";
  width: 12px;
  height: 2px;
  background: var(--cinnabar);
}

.theme-info p {
  font-size: var(--t-sm);
  color: var(--ink-700);
  line-height: 1.8;
  padding-left: var(--s-3);
}

/* ---------- 引言 ---------- */
.banner-quote {
  padding: var(--s-7) 0;
  background: linear-gradient(180deg, var(--paper-50) 0%, var(--paper-100) 100%);
  text-align: center;
}

.quote-zh {
  font-size: var(--t-2xl);
  line-height: 2.2;
  color: var(--ink-900);
  letter-spacing: 0.2em;
  font-weight: 400;
}

@media (max-width: 720px) {
  .quote-zh { font-size: var(--t-xl); }
}

.quote-by {
  margin-top: var(--s-3);
  font-size: var(--t-sm);
  letter-spacing: 0.3em;
  color: var(--ink-500);
}

/* ---------- 器物卡片 ---------- */
.object-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--s-3);
}

@media (max-width: 980px) { .object-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px) { .object-grid { grid-template-columns: 1fr; } }

.object-card {
  background: var(--paper-50);
  border: 1px solid var(--paper-200);
  border-radius: 2px;
  overflow: hidden;
  transition: all 0.3s;
}

.object-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-paper);
  border-color: var(--cinnabar);
}

.object-art {
  aspect-ratio: 5 / 6;
  overflow: hidden;
  background: var(--paper-100);
}

.object-info {
  padding: var(--s-3);
  text-align: center;
}

.object-info h3 {
  font-size: var(--t-lg);
  font-weight: 500;
  color: var(--ink-900);
  letter-spacing: 0.2em;
  margin-bottom: var(--s-1);
}

.object-info p {
  font-size: var(--t-sm);
  color: var(--ink-500);
  line-height: 1.8;
}

.object-more {
  text-align: center;
  margin-top: var(--s-5);
}

/* ---------- 雅集手记 ---------- */
.journal-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--s-3);
}

@media (max-width: 720px) { .journal-grid { grid-template-columns: 1fr; } }

.journal-card {
  padding: var(--s-4) var(--s-3);
  background: var(--paper-50);
  border: 1px solid var(--paper-200);
  border-radius: 2px;
  transition: all 0.3s;
}

.journal-card:hover {
  border-color: var(--cinnabar);
  background: var(--paper-100);
}

.journal-card time {
  display: block;
  font-size: var(--t-xs);
  letter-spacing: 0.3em;
  color: var(--cinnabar);
  margin-bottom: var(--s-2);
}

.journal-card h3 {
  font-size: var(--t-lg);
  font-weight: 500;
  color: var(--ink-900);
  letter-spacing: 0.1em;
  margin-bottom: var(--s-2);
  line-height: 1.5;
}

.journal-card p {
  font-size: var(--t-sm);
  color: var(--ink-700);
  line-height: 1.9;
  margin-bottom: var(--s-2);
}

.read-more {
  font-size: var(--t-xs);
  letter-spacing: 0.3em;
  color: var(--cinnabar);
  display: inline-block;
  transition: transform 0.2s;
}

.read-more:hover { transform: translateX(4px); }

/* ---------- 小程序 CTA ---------- */
.miniapp-cta {
  background: linear-gradient(180deg, var(--paper-100) 0%, var(--paper-200) 100%);
}

.cta-card {
  background: var(--paper-50);
  border-radius: 2px;
  padding: var(--s-5);
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: var(--s-5);
  align-items: center;
  box-shadow: var(--shadow-paper);
  border: 1px solid var(--paper-200);
}

@media (max-width: 720px) {
  .cta-card {
    grid-template-columns: 1fr;
    text-align: center;
  }
}

.cta-text .label-min {
  display: block;
  margin-bottom: var(--s-1);
}

.cta-text h2 {
  font-size: var(--t-2xl);
  font-weight: 500;
  color: var(--ink-900);
  letter-spacing: 0.1em;
  margin-bottom: var(--s-2);
}

.cta-text > p {
  font-size: var(--t-md);
  color: var(--ink-700);
  margin-bottom: var(--s-3);
}

.cta-features {
  list-style: none;
  font-size: var(--t-sm);
  color: var(--ink-700);
  line-height: 2;
  letter-spacing: 0.1em;
}

.cta-qr {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--s-1);
}

.qr-placeholder {
  width: 180px;
  height: 180px;
  background: #fff;
  border: 1px solid var(--paper-200);
  padding: 12px;
  border-radius: 2px;
}

.qr-placeholder svg { width: 100%; height: 100%; }

.qr-hint {
  font-size: var(--t-xs);
  letter-spacing: 0.3em;
  color: var(--ink-500);
}