/* ============================================
   Illustrated Narrative — 手绘叙事风
   水彩纸张 × 手绘插画 × 手写字体 × 便签装饰 × 温暖亲切
   ============================================ */

/* ===== Reset ===== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

/* ===== CSS Variables ===== */
:root {
  /* 水彩纸张色 */
  --paper-light: #faf8f5;
  --paper-cream: #f5f1eb;
  --paper-warm: #fff9f0;
  
  /* 水彩色调 */
  --watercolor-blue: #7eb8da;
  --watercolor-pink: #f4b5c9;
  --watercolor-green: #a8d5a2;
  --watercolor-yellow: #f7e98e;
  --watercolor-orange: #f5c778;
  --watercolor-purple: #c9b8d9;
  
  /* 文字色 */
  --text-ink: #3a3632;
  --text-pencil: #5c5650;
  --text-faded: #8a8278;
  
  /* 强调色 */
  --accent-coral: #e07b67;
  --accent-teal: #5ba4a4;
  --accent-amber: #d4975c;
  
  /* 边框色 */
  --line-pencil: rgba(58, 54, 50, 0.3);
  --line-marker: rgba(224, 123, 103, 0.4);
  
  /* 背景 */
  --card-bg: #fffcf8;
  --card-shadow: 0 4px 20px rgba(58, 54, 50, 0.08);
  --card-shadow-hover: 0 8px 32px rgba(58, 54, 50, 0.12);
  
  /* 手写字体 */
  --font-hand: 'Caveat', 'Patrick Hand', 'Comic Sans MS', cursive;
  --font-body: 'Georgia', 'Times New Roman', serif;
  
  /* 圆角 */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  
  --max-width: 1400px;
}

/* 暗色主题 */
[data-theme="dark"] {
  --paper-light: #2a2825;
  --paper-cream: #232018;
  --paper-warm: #2d2920;
  --watercolor-blue: #5a98b8;
  --watercolor-pink: #c495a9;
  --watercolor-green: #88b582;
  --watercolor-yellow: #c7b96e;
  --watercolor-orange: #c5a768;
  --watercolor-purple: #a998b9;
  --text-ink: #e8e4df;
  --text-pencil: #c8c4be;
  --text-faded: #9a9690;
  --card-bg: #352f28;
  --line-pencil: rgba(232, 228, 223, 0.2);
  --line-marker: rgba(224, 123, 103, 0.35);
}

/* ===== Body — 水彩纸张 ===== */
body {
  font-family: var(--font-body);
  background: var(--paper-light);
  color: var(--text-ink);
  line-height: 1.7;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  position: relative;
}

/* 纸张纹理背景 */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    linear-gradient(135deg, var(--paper-cream) 0%, var(--paper-light) 50%, var(--paper-warm) 100%);
  z-index: -2;
}

/* 水彩斑点装饰 */
body::after {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  pointer-events: none;
  opacity: 0.3;
  background-image:
    radial-gradient(ellipse 300px 200px at 10% 20%, var(--watercolor-blue), transparent),
    radial-gradient(ellipse 250px 180px at 85% 15%, var(--watercolor-pink), transparent),
    radial-gradient(ellipse 280px 220px at 75% 80%, var(--watercolor-green), transparent),
    radial-gradient(ellipse 200px 160px at 25% 85%, var(--watercolor-yellow), transparent);
  filter: blur(40px);
}

/* ===== 手绘滤镜定义 ===== */
@supports (filter: url("#sketch")) {
  .in-card {
    filter: url("#sketch");
  }
}

/* ===== Navigation — 便签导航栏 ===== */
.sk-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  width: 100%;
  background: linear-gradient(180deg, var(--paper-warm) 0%, var(--paper-light) 100%);
  border-bottom: 3px solid var(--line-pencil);
  transition: all 0.4s;
}

/* 手绘波浪边框 */
.sk-nav::after {
  content: '';
  position: absolute;
  bottom: -12px;
  left: 0;
  right: 0;
  height: 12px;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 12'%3E%3Cpath d='M0 6 Q 12.5 0, 25 6 T 50 6 T 75 6 T 100 6' stroke='%23e07b67' stroke-width='2' fill='none' opacity='0.4'/%3E%3C/svg%3E") repeat-x;
  background-size: 100px 12px;
}

.sk-nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  height: 68px;
  display: flex;
  align-items: center;
  padding: 0 36px;
  gap: 28px;
}

/* Logo — 手写标记 */
.sk-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  flex-shrink: 0;
}

.sk-logo-mark {
  width: 40px;
  height: 40px;
  background: var(--watercolor-yellow);
  border: 2px solid var(--line-pencil);
  border-radius: 50% 45% 55% 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-hand);
  font-size: 22px;
  font-weight: 700;
  color: var(--text-ink);
  box-shadow: 2px 3px 0 var(--line-pencil);
  transform: rotate(-3deg);
  transition: transform 0.3s;
}

.sk-logo:hover .sk-logo-mark {
  transform: rotate(0deg) scale(1.08);
}

.sk-logo-text {
  font-family: var(--font-hand);
  font-size: 26px;
  font-weight: 700;
  color: var(--text-ink);
  letter-spacing: 1px;
}

/* 导航链接 — 便签纸条 */
.sk-nav-links {
  display: flex;
  gap: 8px;
  list-style: none;
}

.sk-nav-links a {
  position: relative;
  text-decoration: none;
  color: var(--text-ink);
  font-family: var(--font-hand);
  font-size: 18px;
  font-weight: 500;
  padding: 8px 18px;
  background: var(--paper-cream);
  border: 2px solid var(--line-pencil);
  border-radius: 8px 12px 10px 14px;
  transition: all 0.3s;
  display: block;
}

.sk-nav-links a::before {
  content: '';
  position: absolute;
  top: -6px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 14px;
  background: var(--watercolor-orange);
  opacity: 0.7;
  border-radius: 2px;
}

.sk-nav-links a:hover {
  background: var(--watercolor-yellow);
  transform: translateY(-2px) rotate(-1deg);
  box-shadow: 3px 4px 0 var(--line-pencil);
}

/* 右侧功能区 */
.sk-nav-right {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 12px;
}

/* 手绘按钮 */
.sk-theme-toggle,
.sk-search-btn,
.sk-mobile-menu-btn {
  width: 40px;
  height: 40px;
  background: var(--paper-cream);
  border: 2px solid var(--line-pencil);
  border-radius: 50% 48% 52% 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-ink);
  font-size: 18px;
  transition: all 0.3s;
  box-shadow: 2px 2px 0 var(--line-pencil);
}

.sk-theme-toggle:hover,
.sk-search-btn:hover {
  background: var(--watercolor-blue);
  transform: rotate(-5deg);
}

.sk-search-btn svg { width: 18px; height: 18px; }

.sk-mobile-menu-btn {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  padding: 10px;
}

.sk-mobile-menu-btn span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--text-ink);
  border-radius: 2px;
  transition: all 0.3s;
}

/* ===== Search Overlay — 便签搜索 ===== */
.sk-search-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(58, 54, 50, 0.3);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 10vh;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}

.sk-search-overlay.active {
  opacity: 1;
  pointer-events: all;
}

.sk-search-overlay-inner {
  width: 100%;
  max-width: 580px;
  background: var(--card-bg);
  border: 3px solid var(--line-pencil);
  border-radius: var(--radius-xl);
  padding: 28px;
  position: relative;
  max-height: 70vh;
  overflow-y: auto;
  box-shadow: 8px 12px 0 rgba(58, 54, 50, 0.15);
  transform: rotate(-1deg);
}

/* 便签胶带装饰 */
.sk-search-overlay-inner::before {
  content: '';
  position: absolute;
  top: -10px;
  left: 50%;
  transform: translateX(-50%) rotate(2deg);
  width: 80px;
  height: 24px;
  background: linear-gradient(135deg, var(--watercolor-orange) 0%, var(--watercolor-yellow) 100%);
  opacity: 0.85;
  border-radius: 4px;
}

.sk-search-close {
  position: absolute;
  top: 12px;
  right: 16px;
  font-size: 28px;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-faded);
  line-height: 1;
  font-family: var(--font-hand);
}

.sk-search-close:hover { color: var(--accent-coral); }

.sk-search-box {
  display: flex;
  align-items: center;
  gap: 14px;
  border-bottom: 2px dashed var(--line-pencil);
  padding-bottom: 18px;
  margin-bottom: 18px;
}

.sk-search-box svg {
  width: 22px;
  height: 22px;
  color: var(--text-pencil);
  flex-shrink: 0;
}

.sk-search-input {
  width: 100%;
  border: none;
  outline: none;
  font-size: 18px;
  font-family: var(--font-hand);
  background: transparent;
  color: var(--text-ink);
}

.sk-search-input::placeholder { color: var(--text-faded); }

.sk-search-results { display: flex; flex-direction: column; gap: 8px; }

.sk-search-result-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px;
  border-radius: var(--radius-md);
  text-decoration: none;
  color: inherit;
  transition: all 0.2s;
  background: transparent;
  border: 2px solid transparent;
}

.sk-search-result-item:hover {
  background: var(--watercolor-yellow);
  border-color: var(--line-pencil);
  transform: rotate(-0.5deg);
}

.sk-search-result-thumb {
  width: 60px;
  height: 45px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  flex-shrink: 0;
  border: 2px solid var(--line-pencil);
  box-shadow: 2px 2px 0 var(--line-pencil);
}

.sk-search-result-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.sk-search-result-info { flex: 1; min-width: 0; }

.sk-search-result-cat {
  font-family: var(--font-hand);
  font-size: 13px;
  font-weight: 600;
  color: var(--accent-coral);
  margin-bottom: 4px;
}

.sk-search-result-title {
  font-family: var(--font-hand);
  font-size: 16px;
  line-height: 1.4;
  color: var(--text-ink);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.sk-search-empty {
  text-align: center;
  padding: 28px;
  color: var(--text-faded);
  font-family: var(--font-hand);
  font-size: 18px;
}

/* ===== Hero — 手绘画卷 ===== */
.sk-hero {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 48px 36px 0;
}

.sk-hero-card {
  display: block;
  text-decoration: none;
  color: inherit;
  background: var(--card-bg);
  border: 3px solid var(--line-pencil);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: 8px 12px 0 rgba(58, 54, 50, 0.1);
  transition: transform 0.4s, box-shadow 0.4s;
  position: relative;
}

/* 手绘边角装饰 */
.sk-hero-card::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, transparent 50%, var(--watercolor-pink) 50%);
  opacity: 0.6;
  z-index: 5;
}

.sk-hero-card::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 50px;
  height: 50px;
  background: linear-gradient(-45deg, transparent 50%, var(--watercolor-green) 50%);
  opacity: 0.5;
  z-index: 5;
}

.sk-hero-card:hover {
  transform: translateY(-6px) rotate(-0.3deg);
  box-shadow: 12px 18px 0 rgba(58, 54, 50, 0.15);
}

.sk-hero-card-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 480px;
}

.sk-hero-card-img {
  position: relative;
  overflow: hidden;
}

.sk-hero-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s;
  filter: sepia(0.1) saturate(1.1);
}

.sk-hero-card:hover .sk-hero-card-img img {
  transform: scale(1.03);
}

.sk-hero-card-body {
  padding: 48px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
  z-index: 2;
}

/* 手绘箭头指向 */
.sk-hero-card-body::before {
  content: '→';
  position: absolute;
  top: 30px;
  left: 30px;
  font-family: var(--font-hand);
  font-size: 36px;
  color: var(--accent-coral);
  opacity: 0.5;
  transform: rotate(-10deg);
}

.sk-hero-label {
  font-family: var(--font-hand);
  font-size: 15px;
  font-weight: 600;
  color: var(--accent-coral);
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 12px;
}

/* 手绘下划线 */
.sk-hero-label::before {
  content: '✏️';
  font-size: 18px;
}

.sk-hero-card-tag {
  display: inline-block;
  font-family: var(--font-hand);
  font-size: 14px;
  font-weight: 600;
  color: var(--text-ink);
  background: var(--watercolor-yellow);
  border: 2px solid var(--line-pencil);
  padding: 6px 16px;
  border-radius: 20px;
  margin-bottom: 20px;
  width: fit-content;
  box-shadow: 2px 2px 0 var(--line-pencil);
}

.sk-hero-card-title {
  font-family: var(--font-hand);
  font-size: 36px;
  font-weight: 700;
  line-height: 1.25;
  color: var(--text-ink);
  margin-bottom: 18px;
  letter-spacing: 0.5px;
}

.sk-hero-card-excerpt {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-pencil);
  margin-bottom: 28px;
  display: -webkit-box;
  -webkit-line-clamp: 4;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.sk-hero-card-cta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-hand);
  font-size: 17px;
  font-weight: 600;
  color: var(--accent-coral);
  padding: 10px 24px;
  background: transparent;
  border: 2px solid var(--accent-coral);
  border-radius: 25px;
  transition: all 0.3s;
  width: fit-content;
}

.sk-hero-card-cta svg { width: 18px; height: 18px; }

.sk-hero-card:hover .sk-hero-card-cta {
  background: var(--accent-coral);
  color: #fff;
  transform: rotate(-1deg);
}

/* ===== 分隔线 — 手绘波浪线 ===== */
.sk-skyline-divider {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 36px;
  height: 60px;
  display: flex;
  align-items: center;
}

.sk-skyline-divider-line {
  width: 100%;
  height: 4px;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 200 4'%3E%3Cpath d='M0 2 Q 25 0, 50 2 T 100 2 T 150 2 T 200 2' stroke='%23e07b67' stroke-width='3' fill='none' opacity='0.5'/%3E%3C/svg%3E") repeat-x;
  background-size: 200px 4px;
}

/* ===== 区块标题 — 手写便签 ===== */
.sk-section {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 36px;
}

.sk-section-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 32px;
  padding-top: 48px;
}

.sk-section-label {
  font-family: var(--font-hand);
  font-size: 16px;
  font-weight: 600;
  color: var(--accent-coral);
  display: flex;
  align-items: center;
  gap: 10px;
}

.sk-section-label::before {
  content: '★';
  font-size: 18px;
}

.sk-section-title {
  font-family: var(--font-hand);
  font-size: 32px;
  font-weight: 700;
  color: var(--text-ink);
  margin-top: 8px;
  letter-spacing: 0.5px;
}

.sk-section-more {
  font-family: var(--font-hand);
  font-size: 16px;
  color: var(--accent-coral);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: gap 0.2s;
  font-weight: 600;
  padding: 6px 14px;
  background: var(--watercolor-yellow);
  border-radius: 20px;
  border: 2px solid var(--line-pencil);
}

.sk-section-more:hover { gap: 10px; }
.sk-section-more svg { width: 16px; height: 16px; }

/* ===== 内容卡片网格 — 手绘卡片群 ===== */
.sk-skyline-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

/* 卡片基础样式 — 便签纸卡片 */
.sk-building {
  background: var(--card-bg);
  border: 2px solid var(--line-pencil);
  border-radius: var(--radius-lg);
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  transition: all 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  box-shadow: 4px 6px 0 rgba(58, 54, 50, 0.1);
  position: relative;
}

/* 胶带装饰 */
.sk-building::before {
  content: '';
  position: absolute;
  top: -8px;
  left: 50%;
  transform: translateX(-50%) rotate(-2deg);
  width: 50px;
  height: 16px;
  background: linear-gradient(135deg, var(--watercolor-orange) 0%, var(--watercolor-yellow) 100%);
  opacity: 0.75;
  border-radius: 2px;
  z-index: 3;
}

.sk-building:hover {
  transform: translateY(-8px) rotate(-1deg);
  box-shadow: 8px 12px 0 rgba(58, 54, 50, 0.15);
  border-color: var(--accent-coral);
}

/* 高度变体 */
.sk-building--tall { grid-row: span 2; }
.sk-building--medium { }
.sk-building--short { }

/* 卡片图片区 */
.sk-building-img {
  position: relative;
  overflow: hidden;
}

.sk-building--tall .sk-building-img { aspect-ratio: 4/3; }
.sk-building--medium .sk-building-img { aspect-ratio: 16/9; }
.sk-building--short .sk-building-img { aspect-ratio: 16/9; }

.sk-building-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s;
  filter: sepia(0.08) saturate(1.05);
}

.sk-building:hover .sk-building-img img {
  transform: scale(1.05);
}

/* 手绘圈圈标记 */
.sk-building-img::after {
  content: '';
  position: absolute;
  top: 12px;
  right: 12px;
  width: 30px;
  height: 30px;
  border: 3px solid var(--accent-coral);
  border-radius: 50% 45% 55% 50%;
  opacity: 0;
  transition: opacity 0.3s;
}

.sk-building:hover .sk-building-img::after {
  opacity: 0.6;
}

/* 分类标签 — 手写标签 */
.sk-building-tag {
  position: absolute;
  top: 12px;
  left: 12px;
  font-family: var(--font-hand);
  font-size: 12px;
  font-weight: 600;
  color: var(--text-ink);
  background: var(--watercolor-yellow);
  padding: 4px 12px;
  border-radius: 12px;
  border: 2px solid var(--line-pencil);
  z-index: 2;
  box-shadow: 2px 2px 0 rgba(58, 54, 50, 0.1);
}

/* 卡片信息区 */
.sk-building-body {
  padding: 18px 20px 24px;
}

.sk-building-title {
  font-family: var(--font-hand);
  font-size: 17px;
  font-weight: 600;
  line-height: 1.35;
  color: var(--text-ink);
  margin-bottom: 10px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.sk-building--tall .sk-building-title {
  font-size: 20px;
  -webkit-line-clamp: 4;
}

.sk-building-excerpt {
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.65;
  color: var(--text-pencil);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.sk-building--tall .sk-building-excerpt {
  -webkit-line-clamp: 5;
  font-size: 15px;
}

.sk-building-read {
  margin-top: 16px;
  font-family: var(--font-hand);
  font-size: 14px;
  font-weight: 600;
  color: var(--accent-coral);
  display: flex;
  align-items: center;
  gap: 6px;
  transition: gap 0.2s;
}

.sk-building-read svg { width: 14px; height: 14px; }
.sk-building:hover .sk-building-read { gap: 10px; }

/* ===== 大图文字交替行 ===== */
.sk-alternating-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 24px;
}

.sk-alternating-row.reverse { direction: rtl; }
.sk-alternating-row.reverse > * { direction: ltr; }

.sk-alt-building {
  background: var(--card-bg);
  border: 2px solid var(--line-pencil);
  border-radius: var(--radius-lg);
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  transition: all 0.35s;
  box-shadow: 4px 6px 0 rgba(58, 54, 50, 0.1);
  display: flex;
  flex-direction: column;
  position: relative;
}

/* 便签胶带 */
.sk-alt-building::before {
  content: '';
  position: absolute;
  top: -10px;
  left: 24px;
  width: 60px;
  height: 18px;
  background: var(--watercolor-blue);
  opacity: 0.7;
  border-radius: 2px;
  transform: rotate(-3deg);
  z-index: 3;
}

.sk-alt-building:hover {
  transform: translateY(-6px) rotate(-0.5deg);
  box-shadow: 8px 12px 0 rgba(58, 54, 50, 0.15);
  border-color: var(--accent-teal);
}

.sk-alt-building-img {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16/9;
}

.sk-alt-building-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s;
  filter: sepia(0.08) saturate(1.05);
}

.sk-alt-building:hover .sk-alt-building-img img {
  transform: scale(1.04);
}

.sk-alt-building-body {
  padding: 24px 28px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.sk-alt-building-tag {
  font-family: var(--font-hand);
  font-size: 14px;
  font-weight: 600;
  color: var(--accent-teal);
  margin-bottom: 12px;
}

.sk-alt-building-title {
  font-family: var(--font-hand);
  font-size: 22px;
  font-weight: 700;
  line-height: 1.25;
  color: var(--text-ink);
  margin-bottom: 12px;
}

.sk-alt-building-excerpt {
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-pencil);
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.sk-alt-building-read {
  margin-top: 18px;
  font-family: var(--font-hand);
  font-size: 15px;
  font-weight: 600;
  color: var(--accent-teal);
  display: flex;
  align-items: center;
  gap: 6px;
  transition: gap 0.2s;
}

.sk-alt-building-read svg { width: 16px; height: 16px; }
.sk-alt-building:hover .sk-alt-building-read { gap: 10px; }

/* ===== 紧凑横排 — 小便签条 ===== */
.sk-row-scroll {
  display: flex;
  gap: 20px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  padding-bottom: 10px;
  scrollbar-width: thin;
  scrollbar-color: var(--accent-coral) transparent;
}

.sk-row-scroll::-webkit-scrollbar { height: 6px; }
.sk-row-scroll::-webkit-scrollbar-track { background: transparent; }
.sk-row-scroll::-webkit-scrollbar-thumb {
  background: var(--accent-coral);
  border-radius: 3px;
}

.sk-compact-building {
  flex-shrink: 0;
  width: 280px;
  scroll-snap-align: start;
  background: var(--card-bg);
  border: 2px solid var(--line-pencil);
  border-radius: var(--radius-md);
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  transition: all 0.3s;
  box-shadow: 3px 4px 0 rgba(58, 54, 50, 0.08);
  position: relative;
}

/* 小胶带装饰 */
.sk-compact-building::before {
  content: '';
  position: absolute;
  top: -6px;
  left: 50%;
  transform: translateX(-50%);
  width: 40px;
  height: 12px;
  background: var(--watercolor-pink);
  opacity: 0.7;
  border-radius: 2px;
  z-index: 3;
}

.sk-compact-building:hover {
  transform: translateY(-5px) rotate(-1deg);
  box-shadow: 6px 8px 0 rgba(58, 54, 50, 0.12);
  border-color: var(--accent-coral);
}

.sk-compact-building-img {
  aspect-ratio: 16/9;
  overflow: hidden;
  position: relative;
}

.sk-compact-building-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s;
  filter: sepia(0.08) saturate(1.05);
}

.sk-compact-building:hover .sk-compact-building-img img {
  transform: scale(1.05);
}

.sk-compact-building-tag {
  position: absolute;
  top: 10px;
  left: 10px;
  font-family: var(--font-hand);
  font-size: 11px;
  font-weight: 600;
  color: var(--text-ink);
  background: var(--watercolor-green);
  padding: 3px 10px;
  border-radius: 10px;
  border: 2px solid var(--line-pencil);
  z-index: 2;
}

.sk-compact-building-body {
  padding: 14px 16px 18px;
}

.sk-compact-building-title {
  font-family: var(--font-hand);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--text-ink);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ===== Footer — 手绘笔记本底 ===== */
.sk-footer {
  background: linear-gradient(180deg, var(--paper-cream) 0%, var(--paper-warm) 100%);
  border-top: 3px solid var(--line-pencil);
  margin-top: 80px;
  position: relative;
}

/* 手绘波浪边 */
.sk-footer::before {
  content: '';
  position: absolute;
  top: -20px;
  left: 0;
  right: 0;
  height: 20px;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 20'%3E%3Cpath d='M0 10 Q 12.5 2, 25 10 T 50 10 T 75 10 T 100 10' stroke='%235ba4a4' stroke-width='3' fill='none' opacity='0.4'/%3E%3C/svg%3E") repeat-x;
  background-size: 100px 20px;
}

.sk-footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 64px 36px 40px;
}

.sk-footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.sk-footer-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.sk-footer-brand-mark {
  width: 32px;
  height: 32px;
  background: var(--watercolor-yellow);
  border: 2px solid var(--line-pencil);
  border-radius: 50% 45% 55% 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-hand);
  font-size: 18px;
  font-weight: 700;
  color: var(--text-ink);
}

.sk-footer-brand-text {
  font-family: var(--font-hand);
  font-size: 22px;
  font-weight: 700;
  color: var(--text-ink);
}

.sk-footer-desc {
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-pencil);
}

.sk-footer-heading {
  font-family: var(--font-hand);
  font-size: 18px;
  font-weight: 600;
  color: var(--text-ink);
  margin-bottom: 18px;
  padding-bottom: 6px;
  border-bottom: 2px dashed var(--line-pencil);
}

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

.sk-footer-links a {
  color: var(--text-pencil);
  text-decoration: none;
  font-family: var(--font-hand);
  font-size: 16px;
  transition: all 0.2s;
  display: inline-block;
}

.sk-footer-links a:hover {
  color: var(--accent-coral);
  transform: translateX(4px);
}

.sk-footer-bottom {
  padding-top: 28px;
  border-top: 2px dashed var(--line-pencil);
  font-family: var(--font-hand);
  font-size: 15px;
  color: var(--text-faded);
  text-align: center;
}

/* ===== Detail Page — 手绘文章页 ===== */
.sk-detail {
  max-width: 880px;
  margin: 0 auto;
  padding: 36px 36px 100px;
}

.sk-detail-back { margin-bottom: 28px; }

.sk-back-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-hand);
  font-size: 18px;
  color: var(--accent-coral);
  text-decoration: none;
  padding: 10px 20px;
  background: var(--watercolor-yellow);
  border: 2px solid var(--line-pencil);
  border-radius: 25px;
  transition: all 0.3s;
  box-shadow: 2px 2px 0 rgba(58, 54, 50, 0.1);
}

.sk-back-link:hover {
  transform: translateX(-4px);
  box-shadow: 4px 4px 0 rgba(58, 54, 50, 0.15);
}

.sk-back-link svg { width: 18px; height: 18px; }

.sk-detail-hero-img {
  width: 100%;
  max-height: 480px;
  object-fit: cover;
  border-radius: var(--radius-xl);
  margin-bottom: 36px;
  box-shadow: 6px 10px 0 rgba(58, 54, 50, 0.1);
  border: 3px solid var(--line-pencil);
  filter: sepia(0.08) saturate(1.05);
}

.sk-detail-tag {
  display: inline-block;
  font-family: var(--font-hand);
  font-size: 14px;
  font-weight: 600;
  color: var(--text-ink);
  background: var(--watercolor-yellow);
  border: 2px solid var(--line-pencil);
  padding: 6px 16px;
  border-radius: 20px;
  margin-bottom: 20px;
  box-shadow: 2px 2px 0 rgba(58, 54, 50, 0.1);
}

.sk-detail-title {
  font-family: var(--font-hand);
  font-size: 40px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-ink);
  margin-bottom: 28px;
  letter-spacing: 0.5px;
}

.sk-detail-body {
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.9;
  color: var(--text-pencil);
}

.sk-detail-body p { margin-bottom: 20px; }
.sk-detail-body strong { color: var(--text-ink); font-weight: 600; }

.sk-detail-body h2,
.sk-detail-body h3 {
  font-family: var(--font-hand);
  color: var(--text-ink);
  margin-top: 36px;
  margin-bottom: 16px;
  font-weight: 700;
}

.sk-detail-body h2 { font-size: 26px; }
.sk-detail-body h3 { font-size: 22px; }

.sk-detail-body ul,
.sk-detail-body ol {
  margin: 16px 0 16px 28px;
}

.sk-detail-body li { margin-bottom: 8px; }

.sk-detail-body a {
  color: var(--accent-coral);
  text-decoration: underline;
  text-decoration-style: wavy;
  text-underline-offset: 3px;
}

.sk-detail-media {
  margin: 36px 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 4px 6px 0 rgba(58, 54, 50, 0.1);
  border: 2px solid var(--line-pencil);
}

.sk-detail-media img { width: 100%; display: block; }

/* ===== Related Section ===== */
.sk-related {
  margin-top: 64px;
  padding-top: 48px;
  border-top: 2px dashed var(--line-pencil);
}

.sk-related-title {
  font-family: var(--font-hand);
  font-size: 22px;
  font-weight: 700;
  color: var(--text-ink);
  margin-bottom: 28px;
}

.sk-related-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.sk-related-card {
  background: var(--card-bg);
  border: 2px solid var(--line-pencil);
  border-radius: var(--radius-md);
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  transition: all 0.3s;
  box-shadow: 3px 4px 0 rgba(58, 54, 50, 0.08);
  position: relative;
}

.sk-related-card::before {
  content: '';
  position: absolute;
  top: -5px;
  left: 50%;
  transform: translateX(-50%);
  width: 35px;
  height: 10px;
  background: var(--watercolor-purple);
  opacity: 0.7;
  border-radius: 2px;
  z-index: 3;
}

.sk-related-card:hover {
  transform: translateY(-4px) rotate(-1deg);
  box-shadow: 6px 8px 0 rgba(58, 54, 50, 0.12);
  border-color: var(--accent-coral);
}

.sk-related-card-img {
  width: 100%;
  aspect-ratio: 16/9;
  overflow: hidden;
}

.sk-related-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s;
  filter: sepia(0.08) saturate(1.05);
}

.sk-related-card:hover .sk-related-card-img img {
  transform: scale(1.04);
}

.sk-related-card-title {
  padding: 14px 16px;
  font-family: var(--font-hand);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--text-ink);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ===== Static Page ===== */
.sk-static {
  max-width: 880px;
  margin: 0 auto;
  padding: 36px 36px 100px;
}

.sk-static-title {
  font-family: var(--font-hand);
  font-size: 36px;
  font-weight: 700;
  color: var(--text-ink);
  margin-bottom: 36px;
}

.sk-static-content {
  background: var(--card-bg);
  border: 3px solid var(--line-pencil);
  border-radius: var(--radius-xl);
  padding: 36px;
  color: var(--text-pencil);
  line-height: 1.85;
  font-size: 16px;
  box-shadow: 6px 10px 0 rgba(58, 54, 50, 0.1);
  position: relative;
}

.sk-static-content::before {
  content: '';
  position: absolute;
  top: -10px;
  right: 40px;
  width: 70px;
  height: 18px;
  background: var(--watercolor-blue);
  opacity: 0.7;
  border-radius: 2px;
  transform: rotate(2deg);
}

.sk-static-content p { margin-bottom: 16px; }
.sk-static-content strong { color: var(--text-ink); font-weight: 600; }
.sk-static-content a { color: var(--accent-coral); text-decoration: underline; }

.sk-static-content h2,
.sk-static-content h3 {
  color: var(--text-ink);
  margin-top: 28px;
  margin-bottom: 12px;
  font-family: var(--font-hand);
  font-weight: 700;
}

/* ===== 滚动显示动画 ===== */
.sk-reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.sk-reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== 响应式 ===== */
@media (max-width: 1200px) {
  .sk-skyline-grid { grid-template-columns: repeat(3, 1fr); }
  .sk-related-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 1024px) {
  .sk-hero-card-inner { grid-template-columns: 1fr; min-height: auto; }
  .sk-hero-card-img { aspect-ratio: 16/9; }
  .sk-hero-card-body { padding: 36px; }
  .sk-skyline-grid { grid-template-columns: repeat(2, 1fr); }
  .sk-alternating-row { grid-template-columns: 1fr; }
  .sk-footer-top { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .sk-nav-inner { padding: 0 24px; }
  .sk-nav-links { display: none; }
  .sk-mobile-menu-btn { display: flex; }
  .sk-hero { padding: 28px 24px 0; }
  .sk-hero-card-title { font-size: 28px; }
  .sk-hero-card-body { padding: 28px; }
  .sk-section { padding: 0 24px; }
  .sk-skyline-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
  .sk-building--tall { grid-row: span 1; }
  .sk-alt-building-title { font-size: 19px; }
  .sk-footer-top { grid-template-columns: 1fr; gap: 36px; }
  .sk-related-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .sk-skyline-grid { grid-template-columns: 1fr; }
  .sk-compact-building { width: 240px; }
  .sk-hero-card-title { font-size: 24px; }
  .sk-section-title { font-size: 26px; }
  .sk-detail-title { font-size: 32px; }
  .sk-detail-body { font-size: 16px; }
  .sk-related-grid { grid-template-columns: 1fr 1fr; gap: 14px; }
}

/* ===== 打印样式 — 保持手绘质感 ===== */
@media print {
  body {
    background: #fff;
  }
  body::before,
  body::after {
    display: none;
  }
  .sk-nav,
  .sk-footer {
    display: none;
  }
  .sk-building::before,
  .sk-alt-building::before,
  .sk-compact-building::before {
    display: none;
  }
}