/* ==========================================================================
   ARK (ark-jc.lat) - 官方推广落地页核心样式表
   规范：原生 CSS，遵循现代科技感暗色美学与严格弹窗规范
   ========================================================================== */

/* -------------------- CSS 变量与设计令牌 -------------------- */
:root {
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  
  /* 色彩体系 */
  --color-bg: #090d16;
  --color-bg-alt: #0d1322;
  --color-surface: rgba(18, 25, 41, 0.75);
  --color-surface-hover: rgba(28, 38, 62, 0.85);
  --color-border: rgba(255, 255, 255, 0.08);
  --color-border-glow: rgba(0, 153, 255, 0.35);
  
  --color-text-primary: #f8fafc;
  --color-text-secondary: #94a3b8;
  --color-text-muted: #64748b;
  
  --color-accent-blue: #0099ff;
  --color-accent-cyan: #00b4d8;
  --gradient-cta: linear-gradient(135deg, #0099ff 0%, #00b4d8 100%);
  --gradient-cta-hover: linear-gradient(135deg, #00aaff 0%, #00c6ee 100%);
  
  --color-warning-bg: #fffbeb;
  --color-warning-border: #fde68a;
  --color-warning-text: #b45309;
  --color-success: #10b981;
  --color-warning: #f59e0b;
  
  /* 阴影 */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.15);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.25);
  --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 10px 25px rgba(0, 153, 255, 0.38);
  
  /* 基础尺寸 */
  --container-max: 1200px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-pill: 999px;
  
  /* 过渡动画 */
  --transition-fast: 0.18s ease;
  --transition-normal: 0.28s ease;
}

/* -------------------- 全局重置与排版 -------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family);
  background-color: var(--color-bg);
  color: var(--color-text-primary);
  line-height: 1.6;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

img, svg {
  display: block;
  max-width: 100%;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  outline: none;
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

/* ==========================================================================
   二、弹窗与遮罩层规范 (严格还原设计图规范)
   ========================================================================== */

/* 1. 遮罩层 (Backdrop)
   - 页面加载后自动覆盖全屏
   - backdrop-filter: blur(8px); background: rgba(0, 0, 0, 0.45);
   - 使底层落地页内容柔和虚化
*/
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 99999;
  
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  
  /* 严格规范样式 */
  background: rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  
  /* 默认隐藏，待延迟 300ms 添加 .is-visible 后淡入 */
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.35s cubic-bezier(0.16, 1, 0.3, 1),
              visibility 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

.modal-backdrop.is-visible {
  opacity: 1;
  visibility: visible;
}

/* 2. 弹窗卡片 (Modal Container)
   - 水平及垂直居中悬浮
   - 纯白背景，圆角 16px
   - box-shadow: 0 20px 40px rgba(0,0,0,0.25)
   - 最大宽度 440px，移动端自适应左右留白
*/
.modal-card {
  position: relative;
  width: 100%;
  max-width: 440px;
  background: #ffffff;
  border-radius: 16px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.25);
  padding: 32px 28px 28px 28px;
  color: #1e293b;
  box-sizing: border-box;
  
  /* 动效：缩放与微平移 */
  transform: scale(0.92) translateY(12px);
  transition: transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.modal-backdrop.is-visible .modal-card {
  transform: scale(1) translateY(0);
}

/* 右上角轻量关闭按钮“✕” */
.modal-close-btn {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: #f1f5f9;
  color: #64748b;
  font-size: 16px;
  font-weight: 600;
  line-height: 1;
  transition: background-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}

.modal-close-btn:hover {
  background: #e2e8f0;
  color: #0f172a;
  transform: scale(1.08);
}

.modal-close-btn:active {
  transform: scale(0.95);
}

/* 3. 警告标题与图标 */
.modal-header {
  text-align: center;
  margin-bottom: 16px;
}

.modal-icon {
  font-size: 40px;
  line-height: 1;
  margin-bottom: 12px;
  display: inline-block;
  animation: pulseWarning 2s infinite ease-in-out;
}

@keyframes pulseWarning {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.08); }
}

.modal-title {
  font-size: 1.375rem; /* 22px */
  font-weight: 700;
  color: #0f172a; /* 深色加粗 */
  letter-spacing: -0.01em;
  margin: 0;
}

/* 4. 公告正文 (严格使用方案一文案) */
.modal-body {
  margin-bottom: 24px;
}

.modal-announcement {
  font-size: 0.95rem; /* ~15px */
  line-height: 1.65;
  color: #334155;
  letter-spacing: 0.01em;
  background: #fffbeb;
  border: 1px solid #fef3c7;
  border-left: 4px solid #f59e0b;
  border-radius: 8px;
  padding: 14px 14px;
  text-align: justify;
  word-break: break-word;
}

/* 5. 核心行动按钮 (CTA)
   - 大圆角药丸按钮 (border-radius: 999px)
   - 高亮亮蓝色 (#0099ff 到 #00b4d8 渐变)
   - 悬停微动效与亮度提升
*/
.modal-actions {
  display: flex;
  flex-direction: column;
  align-items: stretch;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  text-align: center;
  user-select: none;
  cursor: pointer;
  transition: all var(--transition-normal);
  text-decoration: none;
  white-space: nowrap;
}

.btn-pill-primary {
  border-radius: var(--radius-pill); /* 999px */
  background: var(--gradient-cta);
  color: #ffffff;
  padding: 14px 28px;
  font-size: 1rem;
  box-shadow: 0 4px 14px rgba(0, 153, 255, 0.35);
}

.btn-pill-primary:hover {
  background: var(--gradient-cta-hover);
  color: #ffffff;
  transform: translateY(-2px);
  filter: brightness(1.08);
  box-shadow: var(--shadow-glow);
}

.btn-pill-primary:active {
  transform: translateY(0);
  box-shadow: 0 2px 8px rgba(0, 153, 255, 0.4);
}

.btn-pill-ghost {
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--color-border);
  color: var(--color-text-primary);
  padding: 14px 28px;
  font-size: 1rem;
}

.btn-pill-ghost:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.2);
  color: #ffffff;
  transform: translateY(-2px);
}

/* ==========================================================================
   四、底层落地页骨架样式
   ========================================================================== */

/* 1. 顶部页眉 (Header) */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  background: rgba(9, 13, 22, 0.82);
  border-bottom: 1px solid var(--color-border);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 800;
  font-size: 1.45rem;
  letter-spacing: -0.02em;
  color: #ffffff;
}

.logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: var(--gradient-cta);
  font-size: 1.1rem;
  box-shadow: 0 2px 8px rgba(0, 153, 255, 0.4);
}

.logo-text {
  font-weight: 800;
  letter-spacing: 0.05em;
  background: linear-gradient(135deg, #ffffff 60%, #00b4d8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-link {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  font-weight: 500;
}

.nav-link:hover {
  color: var(--color-accent-cyan);
}

.btn-header-cta {
  background: rgba(0, 153, 255, 0.12);
  border: 1px solid rgba(0, 153, 255, 0.4);
  color: #00b4d8;
  border-radius: var(--radius-pill);
  padding: 8px 18px;
  font-size: 0.875rem;
  font-weight: 600;
}

.btn-header-cta:hover {
  background: var(--gradient-cta);
  color: #ffffff;
  border-color: transparent;
  box-shadow: var(--shadow-glow);
}

/* 顶部公告横幅 */
.announcement-bar {
  background: rgba(245, 158, 11, 0.12);
  border-bottom: 1px solid rgba(245, 158, 11, 0.25);
  color: #fbbf24;
  font-size: 0.875rem;
  padding: 10px 0;
}

.announcement-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  text-align: center;
}

.badge-status {
  background: #f59e0b;
  color: #1e1e1e;
  font-weight: 700;
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: 4px;
}

.announcement-text {
  font-weight: 500;
}

.announcement-link {
  color: #ffffff;
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.announcement-link:hover {
  color: #38bdf8;
}

/* 2. 主视觉区 (Hero Section) */
.hero-section {
  position: relative;
  padding: 80px 0 70px 0;
  overflow: hidden;
  text-align: center;
}

.hero-bg-glow {
  position: absolute;
  top: -100px;
  left: 50%;
  transform: translateX(-50%);
  width: 700px;
  height: 450px;
  background: radial-gradient(circle, rgba(0, 153, 255, 0.22) 0%, rgba(0, 180, 216, 0.08) 50%, transparent 75%);
  filter: blur(60px);
  pointer-events: none;
  z-index: 0;
}

.hero-container {
  position: relative;
  z-index: 1;
  max-width: 860px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(0, 153, 255, 0.1);
  border: 1px solid rgba(0, 153, 255, 0.25);
  padding: 6px 16px;
  border-radius: var(--radius-pill);
  font-size: 0.85rem;
  color: #38bdf8;
  font-weight: 600;
  margin-bottom: 24px;
}

.hero-badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #10b981;
  box-shadow: 0 0 8px #10b981;
}

.hero-title {
  font-size: 3rem;
  line-height: 1.15;
  font-weight: 800;
  letter-spacing: -0.025em;
  margin-bottom: 20px;
}

.hero-title span {
  background: var(--gradient-cta);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.125rem;
  line-height: 1.7;
  color: var(--color-text-secondary);
  max-width: 680px;
  margin: 0 auto 36px auto;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.hero-btn-main {
  font-size: 1.05rem;
  padding: 16px 36px;
  gap: 8px;
}

.btn-arrow {
  transition: transform var(--transition-fast);
}

.hero-btn-main:hover .btn-arrow {
  transform: translateX(4px);
}

.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 28px;
  flex-wrap: wrap;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-radius: var(--radius-md);
  padding: 20px 28px;
  max-width: 780px;
  margin: 0 auto;
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.stat-number {
  font-size: 1.4rem;
  font-weight: 800;
  color: #ffffff;
  letter-spacing: -0.01em;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  margin-top: 2px;
}

.stat-divider {
  width: 1px;
  height: 36px;
  background: var(--color-border);
}

/* 3. 核心优势卡片 (Features Section) */
.features-section {
  padding: 80px 0;
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 48px auto;
}

.section-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--color-accent-blue);
  text-transform: uppercase;
  margin-bottom: 10px;
}

.section-title {
  font-size: 2.1rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.section-desc {
  font-size: 1rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

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

.feature-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  transition: transform var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-border-glow);
  box-shadow: 0 12px 32px rgba(0, 153, 255, 0.15);
}

.feature-icon-wrapper {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: rgba(0, 153, 255, 0.12);
  border: 1px solid rgba(0, 153, 255, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.feature-icon {
  font-size: 28px;
}

.feature-card-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: #ffffff;
}

.feature-card-desc {
  font-size: 0.925rem;
  color: var(--color-text-secondary);
  line-height: 1.65;
  margin-bottom: 20px;
  flex-grow: 1;
}

.feature-card-list {
  list-style: none;
  border-top: 1px solid var(--color-border);
  padding-top: 16px;
  font-size: 0.85rem;
  color: var(--color-text-primary);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

/* 4. 节点监控与割接 (Nodes Section) */
.nodes-section {
  padding: 80px 0;
}

.node-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  margin-bottom: 36px;
}

.node-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
  transition: border-color var(--transition-fast);
}

.node-item:hover {
  border-color: rgba(255, 255, 255, 0.2);
}

.node-item-warning {
  border-color: rgba(245, 158, 11, 0.35);
  background: rgba(245, 158, 11, 0.05);
}

.node-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  gap: 8px;
}

.node-flag {
  font-size: 1.2rem;
}

.node-name {
  font-size: 0.85rem;
  font-weight: 600;
  color: #f1f5f9;
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.node-pill {
  font-size: 0.7rem;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 4px;
}

.pill-online {
  background: rgba(16, 185, 129, 0.15);
  color: #34d399;
}

.pill-warning {
  background: rgba(245, 158, 11, 0.2);
  color: #fbbf24;
}

.node-metrics {
  display: flex;
  justify-content: space-between;
  padding-top: 12px;
  border-top: 1px solid var(--color-border);
}

.metric {
  display: flex;
  flex-direction: column;
}

.metric-label {
  font-size: 0.725rem;
  color: var(--color-text-muted);
}

.metric-val {
  font-size: 0.875rem;
  font-weight: 700;
  color: #f1f5f9;
}

.text-accent {
  color: var(--color-accent-cyan);
}

.text-warning {
  color: #fbbf24;
}

.node-action-box {
  background: linear-gradient(135deg, rgba(0, 153, 255, 0.08) 0%, rgba(18, 25, 41, 0.8) 100%);
  border: 1px dashed rgba(0, 153, 255, 0.35);
  border-radius: var(--radius-lg);
  padding: 28px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}

.node-action-text {
  font-size: 1rem;
  color: #e2e8f0;
  font-weight: 500;
}

/* 5. 常见问题 (FAQ Section) */
.faq-section {
  padding: 80px 0;
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
}

.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  transition: border-color var(--transition-fast);
}

.faq-item[open] {
  border-color: rgba(0, 153, 255, 0.35);
}

.faq-question {
  font-size: 1.05rem;
  font-weight: 600;
  color: #ffffff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  list-style: none;
}

.faq-question::-webkit-details-marker {
  display: none;
}

.faq-icon {
  font-size: 1.3rem;
  color: var(--color-accent-cyan);
  transition: transform var(--transition-fast);
  font-weight: 300;
}

.faq-item[open] .faq-icon {
  transform: rotate(45deg);
}

.faq-answer {
  margin-top: 14px;
  font-size: 0.925rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* 6. 底部行动区 (Bottom CTA) */
.bottom-cta-section {
  padding: 90px 0;
  text-align: center;
  background: radial-gradient(circle at bottom, rgba(0, 153, 255, 0.15) 0%, transparent 60%);
}

.bottom-cta-container {
  max-width: 680px;
}

.bottom-cta-title {
  font-size: 2.3rem;
  font-weight: 800;
  margin-bottom: 16px;
}

.bottom-cta-desc {
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  margin-bottom: 32px;
}

/* 7. 页脚 (Footer) */
.site-footer {
  background: #05080e;
  border-top: 1px solid var(--color-border);
  padding-top: 60px;
  font-size: 0.9rem;
}

.footer-container {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}

.footer-brand-col {
  max-width: 320px;
}

.footer-logo {
  margin-bottom: 16px;
}

.footer-brand-text {
  color: var(--color-text-secondary);
  line-height: 1.6;
  font-size: 0.875rem;
}

.footer-heading {
  font-size: 0.95rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 18px;
  letter-spacing: 0.02em;
}

.footer-links-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links-list a {
  color: var(--color-text-secondary);
  font-size: 0.875rem;
  transition: color var(--transition-fast);
}

.footer-links-list a:hover {
  color: var(--color-accent-cyan);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding: 24px 0;
  background: #030509;
}

.footer-bottom-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.footer-domain-link {
  color: #38bdf8;
  font-weight: 600;
}

.footer-domain-link:hover {
  text-decoration: underline;
}

/* 辅助弹窗 dialog */
.info-dialog {
  border: none;
  border-radius: 16px;
  padding: 0;
  background: transparent;
  max-width: 520px;
  width: 90%;
  margin: auto;
}

.info-dialog::backdrop {
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
}

.info-dialog-card {
  background: #111827;
  border: 1px solid var(--color-border);
  border-radius: 16px;
  padding: 24px;
  color: #f3f4f6;
  box-shadow: var(--shadow-lg);
}

.info-dialog-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.info-dialog-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: #ffffff;
}

.info-dialog-content {
  font-size: 0.9rem;
  line-height: 1.65;
  color: var(--color-text-secondary);
  margin-bottom: 24px;
  max-height: 60vh;
  overflow-y: auto;
}

.info-dialog-actions {
  display: flex;
  justify-content: flex-end;
}

/* ==========================================================================
   五、移动端优先适配 (Responsive Rules)
   ========================================================================== */
@media (max-width: 992px) {
  .features-grid {
    grid-template-columns: 1fr;
  }
  
  .node-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .footer-container {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
  
  .footer-brand-col {
    grid-column: span 2;
    max-width: 100%;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none; /* 移动端精简保持紧凑 */
  }
  
  .hero-title {
    font-size: 2.1rem;
  }
  
  .hero-subtitle {
    font-size: 1rem;
  }
  
  .hero-stats {
    gap: 16px;
    padding: 16px;
  }
  
  .stat-divider {
    display: none;
  }
  
  .stat-item {
    width: 45%;
  }
  
  .hero-cta-group {
    flex-direction: column;
    width: 100%;
  }
  
  .hero-cta-group .btn {
    width: 100%;
  }
  
  .node-grid {
    grid-template-columns: 1fr;
  }
  
  .node-action-box {
    flex-direction: column;
    text-align: center;
  }
  
  .node-action-box .btn {
    width: 100%;
  }
  
  .footer-container {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  
  .footer-brand-col {
    grid-column: span 1;
  }
  
  .footer-bottom-container {
    flex-direction: column;
    text-align: center;
  }
}

/* 弹窗在极窄屏幕自适应 */
@media (max-width: 480px) {
  .modal-card {
    padding: 24px 18px 20px 18px;
    border-radius: 14px;
  }
  
  .modal-title {
    font-size: 1.2rem;
  }
  
  .modal-announcement {
    font-size: 0.875rem;
    padding: 12px;
  }
  
  .modal-actions .btn {
    padding: 12px 20px;
    font-size: 0.95rem;
  }
}