/* ----------------------------------------------------
   人情关系账本 “往来” 宣传落地页样式系统
   色彩、圆角、阴影与手账拟真风格严格遵循 .stitch/DESIGN.md
   ---------------------------------------------------- */

:root {
  /* Core Palette */
  --bg-warm-neutral: #F8F6F2;
  --surface-card-white: #FFFFFF;
  --primary-terracotta: #C96A4A;
  --primary-deep: #8A432E;
  --primary-soft: #F7E1D6;
  --secondary-jade: #7E9C8C;
  --secondary-deep: #5F7D6A;
  --secondary-soft: #E8F0EC;
  --text-primary: #1F2933;
  --text-secondary: #6B7280;
  --border-soft: #E7E2DA;
  --border-strong: #CFC9BE;
  --overlay-bg: rgba(30, 20, 15, 0.4);

  /* Typography */
  --font-serif: 'Noto Serif SC', Georgia, serif;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  /* Shadows & Roundness */
  --shadow-light: 0 4px 20px rgba(31, 41, 51, 0.04);
  --shadow-card: 0 10px 30px rgba(31, 41, 51, 0.06);
  --shadow-polaroid: 0 15px 40px rgba(31, 41, 51, 0.1);
  --radius-standard: 12px;
  --radius-large: 20px;
}

/* 基础重置与纸张背景 */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-warm-neutral);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* 细腻的手账纸张微弱网格纹理背景 */
.paper-grid {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: -1;
  background-image: 
    linear-gradient(rgba(231, 226, 218, 0.4) 1px, transparent 1px),
    linear-gradient(90deg, rgba(231, 226, 218, 0.4) 1px, transparent 1px);
  background-size: 24px 24px;
}

/* 头部导航 */
.app-header {
  background-color: rgba(248, 246, 242, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-soft);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.brand-lockup {
  display: flex;
  align-items: center;
  gap: 10px; /* 品牌Logo与文字遵循黄金比例排版 */
  cursor: pointer;
  transition: transform 0.2s ease;
}

.brand-lockup:hover {
  transform: scale(1.02);
}

.brand-logo {
  width: 32px;
  height: 32px;
  object-fit: contain;
  border-radius: 8px; /* 适配鸿蒙Logo的不规则圆角 */
}

.brand-name {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 700;
  color: var(--primary-terracotta);
}

.system-tag {
  font-size: 13px;
  font-weight: 600;
  color: var(--secondary-jade);
  background-color: var(--secondary-soft);
  padding: 4px 12px;
  border-radius: 20px;
  border: 1px solid rgba(126, 156, 140, 0.2);
}

/* 页面主要区域 */
.main-content {
  max-width: 1100px;
  margin: 0 auto;
  padding: 40px 24px 80px;
}

/* ----------------------------------------------------
   Hero 首屏区域
   ---------------------------------------------------- */
.hero-section {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 60px;
  align-items: center;
  margin-bottom: 100px;
}

.hero-info {
  display: flex;
  flex-direction: column;
}

.hero-title {
  font-family: var(--font-serif);
  font-size: 52px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-primary);
  margin-bottom: 24px;
  letter-spacing: -0.5px;
}

.hero-subtitle {
  font-size: 18px;
  color: var(--text-secondary);
  margin-bottom: 40px;
  max-width: 520px;
  line-height: 1.7;
}

/* 下载容器与扫码 */
.download-container {
  display: flex;
  align-items: center;
  gap: 32px;
}

.download-actions {
  display: flex;
  flex-direction: column;
  gap: 16px;
}


/* 主 CTA 按钮：陶土红胶囊按钮 */
.btn-primary {
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--primary-terracotta);
  color: var(--surface-card-white);
  padding: 16px 28px;
  border-radius: 30px;
  font-size: 16px;
  font-weight: 600;
  text-decoration: none;
  gap: 10px; /* 图标与文本黄金比例间距：20px / 1.618 ≈ 12px -> 使用10px */
  box-shadow: 0 4px 15px rgba(201, 106, 74, 0.2);
  transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  border: 1px solid transparent;
}

.btn-primary:hover {
  background-color: var(--primary-deep);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(138, 67, 46, 0.3);
}

.btn-primary:active {
  transform: translateY(0);
}

/* 次级下载链接 */
.btn-secondary-link {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  background-color: rgba(231, 226, 218, 0.3);
  border: 1px dashed var(--border-strong);
  padding: 12px 24px;
  border-radius: 30px;
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  gap: 8px; /* 18px / 1.618 ≈ 11px -> 使用 8px */
  transition: all 0.2s ease;
}

.btn-secondary-link:hover {
  background-color: rgba(231, 226, 218, 0.6);
  color: var(--text-primary);
  border-color: var(--text-secondary);
}

/* 拍立得扫码卡片 */
.qr-polaroid {
  background-color: var(--surface-card-white);
  padding: 12px 12px 18px 12px;
  border-radius: 8px;
  box-shadow: var(--shadow-polaroid);
  border: 1px solid var(--border-soft);
  display: flex;
  flex-direction: column;
  align-items: center;
  transform: rotate(2deg); /* 拍立得微偏物理倾斜度 */
  transition: transform 0.3s ease;
}

.qr-polaroid:hover {
  transform: rotate(0deg) scale(1.05);
}

.qr-wrapper {
  background-color: #ffffff;
  padding: 8px;
  border: 1px solid var(--border-soft);
  border-radius: 4px;
}

.qr-code-svg,
.qr-code-img {
  display: block;
  object-fit: contain;
}

.polaroid-label {
  margin-top: 10px;
}

.handwritten-text {
  font-family: var(--font-serif);
  font-size: 13px;
  color: var(--primary-deep);
  font-style: italic;
}

/* 拍立得画廊 */
.hero-gallery {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.gallery-polaroid {
  background-color: var(--surface-card-white);
  padding: 16px 16px 28px 16px;
  border-radius: 4px; /* 传统相纸圆角较小 */
  box-shadow: var(--shadow-polaroid);
  border: 1px solid var(--border-soft);
  width: 320px;
  transform: rotate(-1.5deg);
  transition: transform 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.gallery-polaroid:hover {
  transform: rotate(0deg) translateY(-5px);
}

.gallery-photo-container {
  width: 100%;
  aspect-ratio: 3 / 4;
  overflow: hidden;
  background-color: #eae7e3;
  border: 1px solid var(--border-soft);
  position: relative;
}

.gallery-photo-container img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity 0.5s ease;
  position: absolute;
  top: 0;
  left: 0;
}

.gallery-photo-container img.active {
  opacity: 1;
  position: relative;
}

.polaroid-footer {
  margin-top: 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.polaroid-caption {
  font-family: var(--font-serif);
  font-size: 13px;
  font-weight: 700;
  color: var(--text-primary);
}

.polaroid-date {
  font-family: var(--font-serif);
  font-size: 11px;
  color: var(--text-secondary);
}

/* 照片指示器 */
.gallery-nav {
  display: flex;
  gap: 12px;
  margin-top: 24px;
}

.dot-btn {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: 1.5px solid var(--border-strong);
  background-color: transparent;
  cursor: pointer;
  padding: 0;
  transition: all 0.2s ease;
}

.dot-btn.active {
  background-color: var(--primary-terracotta);
  border-color: var(--primary-terracotta);
  transform: scale(1.2);
}

/* ----------------------------------------------------
   特性展示区 (便签贴卡片)
   ---------------------------------------------------- */
.features-section {
  margin-bottom: 100px;
}

.section-header {
  text-align: center;
  margin-bottom: 48px;
}

.section-title {
  font-family: var(--font-serif);
  font-size: 32px;
  font-weight: 700;
  color: var(--text-primary);
  position: relative;
  display: inline-block;
  padding-bottom: 8px;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 30%;
  width: 40%;
  height: 2px;
  background-color: var(--primary-terracotta);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

/* 黄色便签贴基础样式 */
.sticky-note {
  background-color: #FFFDF0; /* 暖黄色便签底 */
  border: 1px dashed #E6DDB8; /* 虚线描边 */
  padding: 32px 24px;
  border-radius: 4px;
  box-shadow: var(--shadow-card);
  position: relative;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

/* 大头针装饰 */
.note-pin {
  width: 12px;
  height: 12px;
  background-color: #E25C5C;
  border-radius: 50%;
  position: absolute;
  top: 12px;
  left: 50%;
  transform: translateX(-50%);
  box-shadow: 0 2px 4px rgba(0,0,0,0.15);
}

.note-pin::after {
  content: '';
  width: 4px;
  height: 4px;
  background-color: rgba(255,255,255,0.4);
  border-radius: 50%;
  position: absolute;
  top: 2px;
  left: 2px;
}

/* 物理微旋转 */
.note-1 { transform: rotate(-1deg); }
.note-2 { transform: rotate(1.5deg); }
.note-3 { transform: rotate(-0.5deg); }

.sticky-note:hover {
  transform: translateY(-6px) rotate(0deg);
  box-shadow: 0 15px 35px rgba(31, 41, 51, 0.08);
  z-index: 5;
}

.feature-icon-wrapper {
  color: var(--primary-terracotta);
  margin-bottom: 20px;
}

.feature-title {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.feature-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ----------------------------------------------------
   交互账页模拟区
   ---------------------------------------------------- */
.visual-demo-section {
  background-color: #EAE7DF; /* 桌面底色 */
  padding: 60px 40px;
  border-radius: var(--radius-large);
  margin-bottom: 100px;
  border: 1px solid var(--border-soft);
  box-shadow: inset 0 2px 10px rgba(0,0,0,0.03);
}

.demo-container {
  max-width: 900px;
  margin: 0 auto;
}

.demo-heading {
  font-family: var(--font-serif);
  font-size: 28px;
  text-align: center;
  margin-bottom: 12px;
}

.demo-subheading {
  font-size: 15px;
  color: var(--text-secondary);
  text-align: center;
  margin-bottom: 48px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* 手账本双页外壳 */
.notebook-mock {
  background-color: #FFFFFF;
  border-radius: var(--radius-standard);
  box-shadow: 0 20px 50px rgba(31, 41, 51, 0.12);
  display: grid;
  grid-template-columns: 1fr 1fr;
  position: relative;
  overflow: hidden;
  border: 1px solid var(--border-strong);
}

/* 本子中线阴影 */
.notebook-mock::after {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 16px;
  height: 100%;
  background: linear-gradient(90deg, rgba(0,0,0,0.05), rgba(0,0,0,0.15) 50%, rgba(0,0,0,0.05));
  pointer-events: none;
}

/* 账页页面 */
.notebook-page {
  padding: 40px;
  background-color: #FFFDFB; /* 象牙白色纸张 */
  display: flex;
  flex-direction: column;
}

.left-page {
  border-right: 1px solid var(--border-soft);
}

.page-title {
  font-family: var(--font-serif);
  font-size: 20px;
  color: var(--primary-deep);
  margin-bottom: 28px;
  border-bottom: 1.5px solid var(--primary-soft);
  padding-bottom: 8px;
}

/* 看板组件 */
.summary-box {
  margin-bottom: 24px;
  padding: 16px;
  background-color: var(--surface-card-white);
  border-radius: var(--radius-standard);
  border: 1px solid var(--border-soft);
}

.summary-label {
  font-size: 12px;
  color: var(--text-secondary);
  display: block;
  margin-bottom: 6px;
}

/* 墨迹巨额金额 */
.summary-amount {
  font-family: var(--font-serif);
  font-size: 32px;
  font-weight: 700;
  line-height: 1.2;
  display: block;
  margin-bottom: 6px;
}

/* 收支特定颜色 */
.amount-incoming {
  color: var(--primary-deep);
}

.amount-outgoing {
  color: var(--secondary-deep);
}

.summary-desc {
  font-size: 11px;
  color: var(--text-secondary);
}

/* 便签贴备注 */
.sticky-memo {
  background-color: #FFFDF0;
  border: 1px dashed #E6DDB8;
  padding: 14px;
  border-radius: 4px;
  margin-top: auto;
  box-shadow: 0 2px 8px rgba(0,0,0,0.03);
}

.memo-title {
  font-size: 12px;
  font-weight: 600;
  color: var(--primary-deep);
  display: block;
  margin-bottom: 4px;
}

.memo-text {
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* 时间线展示 */
.timeline-container {
  display: flex;
  flex-direction: column;
  gap: 20px;
  position: relative;
  padding-left: 20px;
  border-left: 1px dashed var(--border-strong);
}

.timeline-item {
  position: relative;
}

.timeline-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  position: absolute;
  left: -24.5px;
  top: 14px;
  border: 1.5px solid #FFFFFF;
}

.dot-received {
  background-color: var(--primary-terracotta);
  box-shadow: 0 0 0 2px var(--primary-soft);
}

.dot-sent {
  background-color: var(--secondary-jade);
  box-shadow: 0 0 0 2px var(--secondary-soft);
}

/* 手账卡片收支特定设计 */
.timeline-card {
  padding: 16px;
  border-radius: var(--radius-standard);
  border-width: 1px;
  border-style: solid;
}

/* 收到 */
.card-received {
  background-color: var(--primary-soft);
  border-color: var(--primary-terracotta);
}

/* 送出 */
.card-sent {
  background-color: var(--secondary-soft);
  border-color: var(--secondary-jade);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

.relation-name {
  font-weight: 600;
  font-size: 14px;
  color: var(--text-primary);
}

.badge {
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 20px;
  font-weight: 600;
}

.badge-received {
  background-color: var(--primary-terracotta);
  color: var(--surface-card-white);
}

.badge-sent {
  background-color: var(--secondary-jade);
  color: var(--surface-card-white);
}

.event-context, .event-note {
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.5;
}

.amount-ink {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 700;
  margin-top: 8px;
  text-align: right;
  color: var(--primary-deep);
}

/* 虚线画纸备注栏 */
.ruled-note-input {
  margin-top: auto;
  padding: 12px;
  background-color: #FFFDFB;
  border: 1px dashed var(--border-soft);
  border-radius: 4px;
}

.ruled-title {
  font-size: 11px;
  color: var(--text-secondary);
  margin-bottom: 6px;
  display: block;
}

.ruled-line {
  height: 24px;
  border-bottom: 1px dashed var(--border-strong);
}

/* ----------------------------------------------------
   更新日志与安装指南
   ---------------------------------------------------- */
.changelog-section {
  margin-bottom: 80px;
}

.changelog-container {
  background-color: var(--surface-card-white);
  border-radius: var(--radius-standard);
  border: 1px solid var(--border-soft);
  padding: 40px;
  box-shadow: var(--shadow-light);
}

.changelog-heading {
  font-family: var(--font-serif);
  font-size: 28px;
  text-align: center;
  margin-bottom: 40px;
  color: var(--text-primary);
}

.changelog-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
}

.install-guide h3, .changelog-card h3 {
  font-family: var(--font-serif);
  font-size: 18px;
  margin-bottom: 24px;
  color: var(--primary-deep);
}

.guide-steps {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.step {
  display: flex;
  gap: 16px;
}

.step-num {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background-color: var(--primary-soft);
  color: var(--primary-deep);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  flex-shrink: 0;
}

.step-content strong {
  font-size: 15px;
  color: var(--text-primary);
  display: block;
  margin-bottom: 4px;
}

.step-content p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.step-content code {
  font-family: monospace;
  background-color: var(--bg-warm-neutral);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 12px;
  color: var(--primary-deep);
  border: 1px solid var(--border-soft);
  display: inline-block;
  margin-top: 4px;
}

.changelog-date {
  font-size: 12px;
  color: var(--text-secondary);
  display: block;
  margin-top: -16px;
  margin-bottom: 20px;
}

.changelog-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.changelog-list li {
  font-size: 13px;
  color: var(--text-primary);
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.changelog-list li span {
  font-size: 11px;
  background-color: var(--secondary-soft);
  color: var(--secondary-deep);
  padding: 1px 6px;
  border-radius: 4px;
  font-weight: 600;
  flex-shrink: 0;
  margin-top: 2px;
}

/* ----------------------------------------------------
   页脚
   ---------------------------------------------------- */
.app-footer {
  border-top: 1px solid var(--border-soft);
  background-color: rgba(248, 246, 242, 0.6);
  padding: 40px 24px;
  text-align: center;
}

.footer-content p {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.footer-sub {
  font-size: 11px !important;
  color: var(--border-strong) !important;
}

.footer-icp {
  margin-bottom: 8px;
}

.footer-icp a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 13px;
  transition: color 0.2s ease;
}

.footer-icp a:hover {
  color: var(--primary-terracotta);
  text-decoration: underline;
}


/* ----------------------------------------------------
   媒体查询与响应式适配
   ---------------------------------------------------- */
@media (max-width: 900px) {
  .hero-section {
    grid-template-columns: 1fr;
    gap: 48px;
    text-align: center;
  }

  .hero-subtitle {
    margin-left: auto;
    margin-right: auto;
  }

  .download-container {
    justify-content: center;
    flex-wrap: wrap;
  }

  .hero-gallery {
    order: -1; /* 手机端优先展示截图预览 */
  }

  .features-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .sticky-note {
    transform: none !important;
  }

  .notebook-mock {
    grid-template-columns: 1fr;
  }

  .notebook-mock::after {
    display: none;
  }

  .left-page {
    border-right: none;
    border-bottom: 1px solid var(--border-soft);
  }

  .changelog-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}