/* ============================================
   吃瓜社区 - 漫画波普风主样式表
   CSS前缀: ck-
   ============================================ */

/* Google Fonts 本地化 - 使用系统字体回退 */
@font-face {
  font-family: 'Bangers';
  src: local('Bangers');
  font-display: swap;
}

/* ---- 基础变量 ---- */
:root {
  --ck-primary: #FF5722;
  --ck-white: #FFFFFF;
  --ck-green: #4CAF50;
  --ck-text: #212121;
  --ck-link: #FFC107;
  --ck-bg-dots: radial-gradient(circle, #ddd 1px, transparent 1px);
  --ck-shadow-comic: 4px 4px 0px #212121;
  --ck-shadow-comic-sm: 2px 2px 0px #212121;
  --ck-border: 3px solid #212121;
  --ck-radius: 0px;
  --ck-font-title: 'Bangers', 'Comic Sans MS', 'PingFang SC', 'Microsoft YaHei', cursive;
  --ck-font-body: 'Roboto', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
}

/* ---- Reset & Base ---- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--ck-font-body);
  color: var(--ck-text);
  background-color: #FFF8F0;
  line-height: 1.7;
  overflow-x: hidden;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--ck-link);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--ck-primary);
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--ck-font-title);
  line-height: 1.3;
  letter-spacing: 1px;
}

/* ---- 干扰标签隐藏 ---- */
.pop-jammer-block {
  display: none;
}

/* ---- 容器 ---- */
.ck-container {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 20px;
}

.ck-container-sm {
  max-width: 1024px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ============================================
   导航栏
   ============================================ */
#ck-header {
  background: var(--ck-white);
  border-bottom: var(--ck-border);
  z-index: 1000;
  position: relative;
}

.ck-nav-inner {
  max-width: 1440px;
  margin: 0 auto;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.ck-logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.ck-logo img {
  height: 48px;
  width: auto;
}

.ck-logo-text {
  font-family: var(--ck-font-title);
  font-size: 1.6rem;
  color: var(--ck-primary);
  letter-spacing: 2px;
}

.ck-nav-links {
  display: flex;
  list-style: none;
  gap: 8px;
}

.ck-nav-links li a {
  display: block;
  padding: 8px 16px;
  color: var(--ck-text);
  font-weight: 600;
  font-size: 0.95rem;
  border: 2px solid transparent;
  border-radius: 4px;
  transition: all 0.2s ease;
}

.ck-nav-links li a:hover,
.ck-nav-links li a.ck-active {
  color: var(--ck-primary);
  transform: scale(1.05);
  border-color: var(--ck-primary);
  background: rgba(255, 87, 34, 0.05);
}

/* 汉堡菜单 */
.ck-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  background: none;
  border: none;
}

.ck-hamburger span {
  display: block;
  width: 28px;
  height: 3px;
  background: var(--ck-text);
  border-radius: 2px;
  transition: all 0.3s ease;
}

/* 移动端侧边菜单 */
.ck-mobile-menu {
  position: fixed;
  top: 0;
  right: -300px;
  width: 280px;
  height: 100vh;
  background: var(--ck-white);
  border-left: var(--ck-border);
  z-index: 2000;
  transition: right 0.3s ease;
  padding: 60px 20px 20px;
  overflow-y: auto;
}

.ck-mobile-menu.ck-open {
  right: 0;
}

.ck-mobile-menu-close {
  position: absolute;
  top: 16px;
  right: 16px;
  font-size: 1.8rem;
  cursor: pointer;
  background: none;
  border: none;
  color: var(--ck-text);
}

.ck-mobile-menu ul {
  list-style: none;
}

.ck-mobile-menu ul li a {
  display: block;
  padding: 14px 0;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--ck-text);
  border-bottom: 1px solid #eee;
}

.ck-mobile-menu ul li a:hover {
  color: var(--ck-primary);
}

.ck-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.5);
  z-index: 1999;
  display: none;
}

.ck-overlay.ck-show {
  display: block;
}

/* ============================================
   Hero Banner - 今日头瓜
   ============================================ */
#ck-hero {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, var(--ck-primary) 0%, #FF8A65 100%);
  padding: 60px 0;
  text-align: center;
}

.ck-hero-img {
  width: 100%;
  max-height: 500px;
  object-fit: cover;
  border: var(--ck-border);
  box-shadow: var(--ck-shadow-comic);
}

.ck-hero-content {
  position: relative;
  z-index: 2;
}

.ck-hero-title {
  font-size: 3rem;
  color: var(--ck-white);
  text-shadow: 4px 4px 0px rgba(0,0,0,0.3);
  margin-bottom: 16px;
}

.ck-hero-subtitle {
  font-size: 1.3rem;
  color: var(--ck-white);
  opacity: 0.95;
  margin-bottom: 24px;
}

.ck-hero-badge {
  display: inline-block;
  background: var(--ck-link);
  color: var(--ck-text);
  padding: 8px 24px;
  font-weight: 700;
  font-size: 1.1rem;
  border: var(--ck-border);
  box-shadow: var(--ck-shadow-comic-sm);
  transform: rotate(-2deg);
}

/* ============================================
   通用模块标题
   ============================================ */
.ck-section {
  padding: 50px 0;
}

.ck-section-alt {
  background: #FFF3E0;
}

.ck-section-title {
  font-size: 2rem;
  text-align: center;
  color: var(--ck-text);
  margin-bottom: 8px;
  position: relative;
}

.ck-section-title::after {
  content: '';
  display: block;
  width: 80px;
  height: 4px;
  background: var(--ck-primary);
  margin: 10px auto 0;
}

.ck-section-desc {
  text-align: center;
  color: #666;
  font-size: 1.05rem;
  margin-bottom: 36px;
}

/* ============================================
   卡片组件
   ============================================ */
.ck-card {
  background: var(--ck-white);
  border: var(--ck-border);
  box-shadow: var(--ck-shadow-comic);
  overflow: hidden;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  position: relative;
}

.ck-card:hover {
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0px #212121;
}

.ck-card-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-bottom: var(--ck-border);
}

.ck-card-body {
  padding: 16px;
}

.ck-card-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--ck-text);
}

.ck-card-text {
  font-size: 0.9rem;
  color: #555;
  line-height: 1.6;
}

.ck-card-tag {
  display: inline-block;
  background: var(--ck-primary);
  color: var(--ck-white);
  padding: 3px 10px;
  font-size: 0.75rem;
  font-weight: 700;
  border: 2px solid var(--ck-text);
  margin-top: 10px;
}

.ck-card-meta {
  font-size: 0.8rem;
  color: #999;
  margin-top: 8px;
}

/* 卡片网格 */
.ck-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

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

.ck-grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

/* ============================================
   瓜王排行榜
   ============================================ */
.ck-rank-list {
  list-style: none;
}

.ck-rank-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 14px 16px;
  background: var(--ck-white);
  border: var(--ck-border);
  box-shadow: var(--ck-shadow-comic-sm);
  margin-bottom: 12px;
  transition: transform 0.2s;
}

.ck-rank-item:hover {
  transform: translateX(4px);
}

.ck-rank-num {
  font-family: var(--ck-font-title);
  font-size: 1.8rem;
  color: var(--ck-primary);
  min-width: 40px;
  text-align: center;
}

.ck-rank-num.ck-gold { color: #FFD700; }
.ck-rank-num.ck-silver { color: #C0C0C0; }
.ck-rank-num.ck-bronze { color: #CD7F32; }

.ck-rank-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 2px solid var(--ck-text);
  object-fit: cover;
}

.ck-rank-info {
  flex: 1;
}

.ck-rank-name {
  font-weight: 700;
  font-size: 1rem;
}

.ck-rank-score {
  font-size: 0.85rem;
  color: #888;
}

/* ============================================
   爆料直通车
   ============================================ */
#ck-submission {
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
  color: var(--ck-white);
}

#ck-submission .ck-section-title {
  color: var(--ck-white);
}

#ck-submission .ck-section-title::after {
  background: var(--ck-link);
}

.ck-form-group {
  margin-bottom: 16px;
}

.ck-form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 6px;
  font-size: 0.95rem;
}

.ck-input, .ck-textarea {
  width: 100%;
  padding: 12px 16px;
  font-size: 1rem;
  font-family: var(--ck-font-body);
  border: var(--ck-border);
  box-shadow: 4px 4px 0px rgba(255,255,255,0.2);
  background: rgba(255,255,255,0.1);
  color: var(--ck-white);
  outline: none;
  transition: box-shadow 0.2s;
}

.ck-input:focus, .ck-textarea:focus {
  box-shadow: 6px 6px 0px var(--ck-link);
}

.ck-textarea {
  min-height: 120px;
  resize: vertical;
}

.ck-input::placeholder, .ck-textarea::placeholder {
  color: rgba(255,255,255,0.5);
}

/* ============================================
   按钮
   ============================================ */
.ck-btn {
  display: inline-block;
  padding: 12px 28px;
  font-family: var(--ck-font-title);
  font-size: 1.1rem;
  letter-spacing: 1px;
  border: var(--ck-border);
  box-shadow: var(--ck-shadow-comic);
  cursor: pointer;
  transition: all 0.15s ease;
  text-align: center;
}

.ck-btn:hover {
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0px #212121;
}

.ck-btn:active {
  transform: translate(2px, 2px);
  box-shadow: 1px 1px 0px #212121;
}

.ck-btn-primary {
  background: var(--ck-primary);
  color: var(--ck-white);
}

.ck-btn-secondary {
  background: var(--ck-link);
  color: var(--ck-text);
}

.ck-btn-green {
  background: var(--ck-green);
  color: var(--ck-white);
}

/* ============================================
   瓜田竞猜
   ============================================ */
.ck-quiz-card {
  background: var(--ck-white);
  border: var(--ck-border);
  box-shadow: var(--ck-shadow-comic);
  padding: 24px;
  text-align: center;
}

.ck-quiz-question {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--ck-text);
}

.ck-quiz-options {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.ck-quiz-option {
  padding: 10px 24px;
  border: var(--ck-border);
  background: #f5f5f5;
  cursor: pointer;
  font-weight: 600;
  transition: all 0.2s;
  font-family: var(--ck-font-body);
  font-size: 0.95rem;
}

.ck-quiz-option:hover {
  background: var(--ck-primary);
  color: var(--ck-white);
  transform: scale(1.05);
}

.ck-quiz-option.ck-selected {
  background: var(--ck-green);
  color: var(--ck-white);
}

.ck-quiz-stats {
  margin-top: 16px;
  font-size: 0.85rem;
  color: #888;
}

/* ============================================
   考古专区
   ============================================ */
.ck-timeline {
  position: relative;
  padding-left: 40px;
}

.ck-timeline::before {
  content: '';
  position: absolute;
  left: 15px;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--ck-primary);
}

.ck-timeline-item {
  position: relative;
  margin-bottom: 30px;
  padding: 16px 20px;
  background: var(--ck-white);
  border: var(--ck-border);
  box-shadow: var(--ck-shadow-comic-sm);
}

.ck-timeline-item::before {
  content: '';
  position: absolute;
  left: -33px;
  top: 20px;
  width: 16px;
  height: 16px;
  background: var(--ck-link);
  border: 3px solid var(--ck-text);
  border-radius: 50%;
}

.ck-timeline-date {
  font-weight: 700;
  color: var(--ck-primary);
  font-size: 0.9rem;
  margin-bottom: 6px;
}

.ck-timeline-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.ck-timeline-text {
  font-size: 0.9rem;
  color: #555;
}

/* ============================================
   工具箱
   ============================================ */
.ck-tool-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px;
  background: var(--ck-white);
  border: var(--ck-border);
  box-shadow: var(--ck-shadow-comic-sm);
  transition: transform 0.2s;
}

.ck-tool-item:hover {
  transform: translateY(-3px);
}

.ck-tool-icon {
  font-size: 2.5rem;
  min-width: 60px;
  text-align: center;
}

.ck-tool-name {
  font-weight: 700;
  font-size: 1.05rem;
  margin-bottom: 4px;
}

.ck-tool-desc {
  font-size: 0.85rem;
  color: #666;
}

/* ============================================
   社区公约
   ============================================ */
.ck-rules-list {
  list-style: none;
  counter-reset: rule-counter;
}

.ck-rules-list li {
  counter-increment: rule-counter;
  padding: 16px 20px 16px 60px;
  background: var(--ck-white);
  border: var(--ck-border);
  box-shadow: var(--ck-shadow-comic-sm);
  margin-bottom: 12px;
  position: relative;
  font-size: 0.95rem;
}

.ck-rules-list li::before {
  content: counter(rule-counter);
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--ck-font-title);
  font-size: 1.5rem;
  color: var(--ck-primary);
}

/* ============================================
   APP下载
   ============================================ */
#ck-app-download {
  background: linear-gradient(135deg, var(--ck-green) 0%, #2E7D32 100%);
  color: var(--ck-white);
  text-align: center;
  position: relative;
  overflow: hidden;
}

#ck-app-download .ck-section-title {
  color: var(--ck-white);
}

#ck-app-download .ck-section-title::after {
  background: var(--ck-link);
}

.ck-app-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 24px;
}

/* ============================================
   合作洽谈
   ============================================ */
.ck-partner-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  text-align: center;
}

.ck-partner-item {
  padding: 24px;
  background: var(--ck-white);
  border: var(--ck-border);
  box-shadow: var(--ck-shadow-comic-sm);
}

.ck-partner-icon {
  font-size: 2.5rem;
  margin-bottom: 12px;
}

.ck-partner-title {
  font-weight: 700;
  font-size: 1.05rem;
  margin-bottom: 6px;
}

.ck-partner-text {
  font-size: 0.85rem;
  color: #666;
}

/* ============================================
   页脚
   ============================================ */
#ck-footer {
  background: var(--ck-text);
  color: #ccc;
  padding: 40px 0 0;
}

.ck-footer-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  margin-bottom: 30px;
}

.ck-footer-col h4 {
  color: var(--ck-white);
  font-size: 1.1rem;
  margin-bottom: 16px;
  font-family: var(--ck-font-title);
}

.ck-footer-col ul {
  list-style: none;
}

.ck-footer-col ul li {
  margin-bottom: 8px;
}

.ck-footer-col ul li a {
  color: #aaa;
  font-size: 0.9rem;
  transition: color 0.2s;
}

.ck-footer-col ul li a:hover {
  color: var(--ck-link);
}

.ck-footer-social {
  display: flex;
  gap: 12px;
  margin-bottom: 12px;
}

.ck-footer-social a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 2px solid #555;
  border-radius: 50%;
  color: #aaa;
  font-size: 0.9rem;
  transition: all 0.2s;
}

.ck-footer-social a:hover {
  border-color: var(--ck-primary);
  color: var(--ck-primary);
}

.ck-footer-bottom {
  border-top: 1px solid #333;
  padding: 20px 0;
  text-align: center;
  font-size: 0.8rem;
  color: #888;
}

.ck-footer-bottom a {
  color: #aaa;
  margin: 0 4px;
}

.ck-footer-bottom a:hover {
  color: var(--ck-link);
}

.ck-footer-honor {
  color: var(--ck-link);
  font-weight: 600;
  margin-bottom: 8px;
  font-size: 0.85rem;
}

.ck-footer-beian {
  margin-bottom: 8px;
}

.ck-footer-beian img {
  display: inline-block;
  width: 16px;
  height: 16px;
  vertical-align: middle;
  margin-right: 4px;
}

/* ============================================
   内页通用
   ============================================ */
.ck-page-hero {
  padding: 40px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.ck-page-hero-bg {
  width: 100%;
  max-height: 350px;
  object-fit: cover;
  border: var(--ck-border);
  box-shadow: var(--ck-shadow-comic);
  margin-bottom: 20px;
}

.ck-page-title {
  font-size: 2.2rem;
  color: var(--ck-text);
  margin-bottom: 10px;
}

.ck-page-desc {
  font-size: 1.05rem;
  color: #666;
  max-width: 700px;
  margin: 0 auto;
}

.ck-breadcrumb {
  padding: 12px 0;
  font-size: 0.85rem;
  color: #888;
}

.ck-breadcrumb a {
  color: var(--ck-primary);
}

/* 文章内容 */
.ck-article {
  max-width: 800px;
  margin: 0 auto;
  padding: 30px 20px;
}

.ck-article p {
  margin-bottom: 16px;
  font-size: 1rem;
  line-height: 1.8;
}

.ck-article img {
  margin: 20px 0;
  border: var(--ck-border);
  box-shadow: var(--ck-shadow-comic-sm);
}

/* ============================================
   瓜田竞猜页面
   ============================================ */
.ck-quiz-hero {
  background: linear-gradient(135deg, #7B1FA2 0%, #4A148C 100%);
  padding: 60px 0;
  text-align: center;
  color: var(--ck-white);
}

.ck-quiz-hero .ck-page-title {
  color: var(--ck-white);
}

.ck-quiz-big-question {
  font-size: 8rem;
  font-family: var(--ck-font-title);
  color: rgba(255,255,255,0.15);
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  pointer-events: none;
}

.ck-quiz-history {
  background: #f5f5f5;
  padding: 40px 0;
}

.ck-quiz-result {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px;
  background: var(--ck-white);
  border: var(--ck-border);
  box-shadow: var(--ck-shadow-comic-sm);
  margin-bottom: 12px;
}

.ck-quiz-result-status {
  font-weight: 700;
  padding: 4px 12px;
  border: 2px solid;
  font-size: 0.85rem;
}

.ck-quiz-result-status.ck-correct {
  color: var(--ck-green);
  border-color: var(--ck-green);
}

.ck-quiz-result-status.ck-wrong {
  color: #F44336;
  border-color: #F44336;
}

/* ============================================
   APP下载页面
   ============================================ */
.ck-app-page-hero {
  background: linear-gradient(135deg, var(--ck-green) 0%, #1B5E20 100%);
  padding: 60px 0;
  text-align: center;
  color: var(--ck-white);
  position: relative;
  overflow: hidden;
}

.ck-app-phone {
  max-width: 280px;
  margin: 0 auto 24px;
  border: var(--ck-border);
  box-shadow: 8px 8px 0px rgba(0,0,0,0.3);
  border-radius: 20px;
  overflow: hidden;
}

.ck-app-features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 40px;
}

.ck-app-feature {
  text-align: center;
  padding: 24px;
  background: var(--ck-white);
  border: var(--ck-border);
  box-shadow: var(--ck-shadow-comic-sm);
}

.ck-app-feature-icon {
  font-size: 2.5rem;
  margin-bottom: 12px;
}

.ck-app-feature-title {
  font-weight: 700;
  margin-bottom: 6px;
}

.ck-app-feature-text {
  font-size: 0.85rem;
  color: #666;
}

/* 西瓜下落动画 */
.ck-falling-melons {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  overflow: hidden;
}

.ck-falling-melon {
  position: absolute;
  font-size: 1.5rem;
  animation: ck-fall linear infinite;
  opacity: 0.3;
}

@keyframes ck-fall {
  0% { transform: translateY(-50px) rotate(0deg); opacity: 0.3; }
  100% { transform: translateY(100vh) rotate(360deg); opacity: 0; }
}

/* ============================================
   卡片抖动动画
   ============================================ */
@keyframes ck-shake {
  0%, 100% { transform: rotate(0deg); }
  25% { transform: rotate(-2deg); }
  75% { transform: rotate(2deg); }
}

.ck-card:hover {
  animation: ck-shake 0.3s ease;
}

.ck-card-eat {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0);
  background: var(--ck-primary);
  color: var(--ck-white);
  padding: 8px 16px;
  font-family: var(--ck-font-title);
  font-size: 1.2rem;
  border: var(--ck-border);
  pointer-events: none;
  transition: transform 0.2s ease;
  z-index: 10;
  white-space: nowrap;
}

.ck-card:hover .ck-card-eat {
  transform: translate(-50%, -50%) scale(1);
}

/* ============================================
   响应式设计
   ============================================ */

/* 1440px */
@media (max-width: 1440px) {
  .ck-container {
    max-width: 1200px;
  }
}

/* 1024px */
@media (max-width: 1024px) {
  .ck-grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  .ck-grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
  .ck-partner-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .ck-app-features {
    grid-template-columns: repeat(2, 1fr);
  }
  .ck-footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .ck-hero-title {
    font-size: 2.2rem;
  }
}

/* 768px */
@media (max-width: 768px) {
  .ck-nav-links {
    display: none;
  }
  .ck-hamburger {
    display: flex;
  }
  .ck-grid-3,
  .ck-grid-2 {
    grid-template-columns: 1fr;
  }
  .ck-grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  .ck-hero-title {
    font-size: 1.8rem;
  }
  .ck-hero-subtitle {
    font-size: 1rem;
  }
  .ck-section {
    padding: 35px 0;
  }
  .ck-section-title {
    font-size: 1.6rem;
  }
  .ck-footer-grid {
    grid-template-columns: 1fr;
  }
  .ck-partner-grid {
    grid-template-columns: 1fr;
  }
  .ck-app-features {
    grid-template-columns: 1fr;
  }
  .ck-page-title {
    font-size: 1.6rem;
  }
}

/* 360px */
@media (max-width: 400px) {
  html {
    font-size: 14px;
  }
  .ck-grid-4 {
    grid-template-columns: 1fr;
  }
  .ck-hero-title {
    font-size: 1.5rem;
  }
  .ck-nav-inner {
    padding: 10px 12px;
  }
  .ck-logo-text {
    font-size: 1.2rem;
  }
  .ck-quiz-options {
    flex-direction: column;
  }
}

/* ============================================
   辅助类
   ============================================ */
.ck-text-center { text-align: center; }
.ck-text-primary { color: var(--ck-primary); }
.ck-text-green { color: var(--ck-green); }
.ck-text-white { color: var(--ck-white); }
.ck-mt-20 { margin-top: 20px; }
.ck-mb-20 { margin-bottom: 20px; }
.ck-mt-40 { margin-top: 40px; }
.ck-mb-40 { margin-bottom: 40px; }
.ck-hidden { display: none; }