/* ===== 樱花视频 全局样式表 ===== */
/* 风格：日系治愈 · 樱花粉雾 · 毛玻璃 · 圆角卡片 · 响应式 · 暗色模式 */

/* ---------- 自定义属性与主题变量 ---------- */
:root {
  /* 浅色模式 */
  --bg-light: #fdf6f0;
  --bg-dark-mode: #1c1b2e;
  --text-primary-light: #3d2f2f;
  --text-secondary-light: #6b5a5a;
  --text-heading-light: #2d1f1f;
  --text-link-light: #b05c7a;
  --border-light: rgba(176, 92, 122, 0.18);
  --card-bg-light: rgba(255, 255, 255, 0.72);
  --bg-footer-light: #2c3e50;
  --text-footer-light: #fdeef2;
  --btn-bg-light: #b05c7a;
  --btn-text-light: #fff;
  --shadow-light: 0 8px 32px rgba(176, 92, 122, 0.12);
  --gradient-banner: linear-gradient(135deg, #ffe8ef 0%, #fde2e4 50%, #fdf0d5 100%);
  --primary: #b05c7a;
  --primary-soft: rgba(176, 92, 122, 0.15);
  --glass-bg: rgba(255, 255, 255, 0.6);
  --glass-border: rgba(255, 255, 255, 0.5);
  --navbar-bg: rgba(253, 246, 240, 0.75);
  --card-hover-bg: rgba(255, 255, 255, 0.95);
  --backdrop-blur: blur(12px);
  --transition-default: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);

  /* 暗色模式覆盖变量 */
  --dark-bg: #1a1826;
  --dark-text-primary: #ece5e5;
  --dark-text-secondary: #b8a8a8;
  --dark-text-heading: #faf0f0;
  --dark-text-link: #f0a6c0;
  --dark-border: rgba(240, 166, 192, 0.15);
  --dark-card-bg: rgba(44, 40, 58, 0.72);
  --dark-footer-bg: #12101c;
  --dark-text-footer: #e8d5d5;
  --dark-btn-bg: #d47b9a;
  --dark-btn-text: #1a1826;
  --dark-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  --dark-gradient-banner: linear-gradient(135deg, #3a2440 0%, #3c2a3e 50%, #2d3345 100%);
  --dark-glass-bg: rgba(30, 27, 45, 0.6);
  --dark-glass-border: rgba(255, 255, 255, 0.08);
  --dark-navbar-bg: rgba(26, 24, 38, 0.75);
  --dark-card-hover-bg: rgba(56, 50, 74, 0.9);
}

/* ---------- 基础重置与全局元素 ---------- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Roboto, "Helvetica Neue", sans-serif;
  background-color: var(--bg-light);
  color: var(--text-primary-light);
  line-height: 1.8;
  font-size: 16px;
  letter-spacing: 0.02em;
  background-image:
    radial-gradient(circle at 10% 20%, rgba(255, 182, 193, 0.08) 0%, transparent 40%),
    radial-gradient(circle at 90% 80%, rgba(255, 218, 185, 0.1) 0%, transparent 50%);
  background-attachment: fixed;
  transition: background-color 0.4s ease, color 0.4s ease;
  overflow-x: hidden;
}

/* 暗色模式 */
body.dark-mode {
  background-color: var(--dark-bg);
  color: var(--dark-text-primary);
  background-image:
    radial-gradient(circle at 10% 20%, rgba(240, 166, 192, 0.05) 0%, transparent 40%),
    radial-gradient(circle at 90% 80%, rgba(100, 80, 150, 0.08) 0%, transparent 50%);
}

/* ---------- 排版 ---------- */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.35;
  letter-spacing: -0.01em;
  color: var(--text-heading-light);
  transition: color 0.3s ease;
}

body.dark-mode h1,
body.dark-mode h2,
body.dark-mode h3,
body.dark-mode h4,
body.dark-mode h5,
body.dark-mode h6 {
  color: var(--dark-text-heading);
}

h1 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  margin-bottom: 0.6rem;
  font-weight: 700;
}

h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  margin: 2rem 0 1.2rem;
  border-left: 6px solid var(--primary);
  padding-left: 1.1rem;
  position: relative;
}

h2::after {
  content: "";
  display: block;
  width: 60px;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), transparent);
  margin-top: 6px;
  border-radius: 4px;
}

h3 {
  font-size: clamp(1.2rem, 2.5vw, 1.5rem);
  margin: 1.2rem 0 0.8rem;
}

h4 {
  font-size: 1.1rem;
  margin: 1rem 0 0.5rem;
}

p {
  margin-bottom: 1rem;
  text-wrap: pretty;
}

a {
  color: var(--text-link-light);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s ease, opacity 0.2s ease;
  position: relative;
}

a:hover {
  color: var(--primary);
  opacity: 0.85;
}

body.dark-mode a {
  color: var(--dark-text-link);
}

body.dark-mode a:hover {
  color: #ffb3c6;
}

blockquote {
  border-left: 4px solid var(--primary);
  background: var(--primary-soft);
  padding: 1rem 1.5rem;
  border-radius: 0 12px 12px 0;
  font-style: italic;
  margin: 1.5rem 0;
  color: var(--text-secondary-light);
}

body.dark-mode blockquote {
  background: rgba(240, 166, 192, 0.08);
  color: var(--dark-text-secondary);
}

/* ---------- 工具类 ---------- */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
}

.text-center {
  text-align: center;
}

.mt-4 {
  margin-top: 2.5rem;
}

.mb-2 {
  margin-bottom: 1.5rem;
}

.text-secondary {
  color: var(--text-secondary-light);
  font-size: 0.95rem;
}

body.dark-mode .text-secondary {
  color: var(--dark-text-secondary);
}

/* ---------- 毛玻璃通用 ---------- */
.glass-effect {
  background: var(--glass-bg);
  backdrop-filter: var(--backdrop-blur);
  -webkit-backdrop-filter: var(--backdrop-blur);
  border: 1px solid var(--glass-border);
}

body.dark-mode .glass-effect {
  background: var(--dark-glass-bg);
  border-color: var(--dark-glass-border);
}

/* ---------- 导航栏 ---------- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--navbar-bg);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid var(--border-light);
  box-shadow: 0 4px 24px rgba(176, 92, 122, 0.06);
  transition: background-color 0.4s ease, border-color 0.4s ease;
}

body.dark-mode .navbar {
  background: var(--dark-navbar-bg);
  border-bottom-color: var(--dark-border);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.2);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.9rem 1.5rem;
  max-width: 1280px;
  margin: 0 auto;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
}

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-heading-light);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  letter-spacing: 0.5px;
  transition: color 0.3s ease;
}

.logo span {
  background: linear-gradient(135deg, var(--primary), #e08aa4);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

body.dark-mode .logo {
  color: var(--dark-text-heading);
}

.nav-links {
  display: flex;
  gap: 1.8rem;
  align-items: center;
  font-weight: 500;
  flex-wrap: wrap;
}

.nav-links a {
  color: var(--text-primary-light);
  padding: 0.35rem 0.2rem;
  position: relative;
  font-size: 0.98rem;
  letter-spacing: 0.3px;
  transition: all 0.25s ease;
}

body.dark-mode .nav-links a {
  color: var(--dark-text-primary);
}

.nav-links a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), #e08aa4);
  border-radius: 3px;
  transition: width 0.3s cubic-bezier(0.65, 0, 0.35, 1);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

.nav-links a:hover {
  color: var(--primary);
  transform: translateY(-1px);
}

body.dark-mode .nav-links a:hover {
  color: var(--dark-text-link);
}

.menu-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border-light);
  padding: 0.45rem 0.9rem;
  border-radius: 12px;
  font-size: 1.3rem;
  cursor: pointer;
  color: var(--text-primary-light);
  transition: all 0.3s ease;
  line-height: 1;
}

.menu-toggle:hover {
  background: var(--primary-soft);
  border-color: var(--primary);
  transform: scale(1.05);
}

body.dark-mode .menu-toggle {
  color: var(--dark-text-primary);
  border-color: var(--dark-border);
}

body.dark-mode .menu-toggle:hover {
  background: rgba(240, 166, 192, 0.15);
}

/* ---------- Banner ---------- */
.banner {
  background: var(--gradient-banner);
  padding: clamp(2.5rem, 6vw, 4.5rem) 1.5rem;
  text-align: center;
  margin: 2rem 0 3rem;
  border-radius: 28px;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-light);
  border: 1px solid rgba(255, 255, 255, 0.6);
  animation: bannerFadeIn 0.8s ease-out;
}

.banner::before {
  content: "";
  position: absolute;
  top: -50%;
  right: -20%;
  width: 60%;
  height: 200%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.4) 0%, transparent 60%);
  pointer-events: none;
  animation: floatPetal 8s ease-in-out infinite;
}

.banner::after {
  content: "🌸";
  position: absolute;
  bottom: 12px;
  right: 28px;
  font-size: 3rem;
  opacity: 0.15;
  animation: gentleSpin 12s linear infinite;
  pointer-events: none;
}

body.dark-mode .banner {
  background: var(--dark-gradient-banner);
  border-color: var(--dark-border);
  box-shadow: var(--dark-shadow);
}

.banner h1,
.banner h2 {
  border: none;
  padding-left: 0;
  position: relative;
  z-index: 1;
}

.banner h1::after,
.banner h2::after {
  display: none;
}

.banner p {
  font-size: clamp(1rem, 2vw, 1.2rem);
  max-width: 720px;
  margin: 0.8rem auto 1.8rem;
  color: var(--text-secondary-light);
  position: relative;
  z-index: 1;
}

body.dark-mode .banner p {
  color: var(--dark-text-secondary);
}

.banner .btn {
  position: relative;
  z-index: 2;
  box-shadow: 0 6px 20px rgba(176, 92, 122, 0.3);
}

/* ---------- 卡片网格 ---------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.8rem;
  margin: 2rem 0;
}

.card {
  background: var(--card-bg-light);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--border-light);
  border-radius: 20px;
  padding: 1.8rem 1.5rem;
  box-shadow: 0 4px 20px rgba(176, 92, 122, 0.06);
  transition: transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.35s ease, background-color 0.3s ease, border-color 0.3s ease;
  will-change: transform;
  animation: cardFadeUp 0.6s ease-out both;
  animation-delay: calc(var(--card-index, 0) * 60ms);
}

.card:nth-child(1) { --card-index: 0; }
.card:nth-child(2) { --card-index: 1; }
.card:nth-child(3) { --card-index: 2; }
.card:nth-child(4) { --card-index: 3; }
.card:nth-child(5) { --card-index: 4; }
.card:nth-child(6) { --card-index: 5; }
.card:nth-child(7) { --card-index: 6; }
.card:nth-child(8) { --card-index: 7; }
.card:nth-child(9) { --card-index: 8; }
.card:nth-child(10) { --card-index: 9; }

.card:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: 0 16px 40px rgba(176, 92, 122, 0.15);
  background: var(--card-hover-bg);
  border-color: rgba(176, 92, 122, 0.35);
}

body.dark-mode .card {
  background: var(--dark-card-bg);
  border-color: var(--dark-border);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

body.dark-mode .card:hover {
  background: var(--dark-card-hover-bg);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.4);
  border-color: rgba(240, 166, 192, 0.3);
}

.card h3 {
  margin-top: 0;
  position: relative;
  display: inline-block;
}

.card h3::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 30px;
  height: 2px;
  background: var(--primary);
  border-radius: 4px;
  transition: width 0.3s ease;
}

.card:hover h3::after {
  width: 50px;
}

.card p {
  color: var(--text-secondary-light);
  font-size: 0.95rem;
}

body.dark-mode .card p {
  color: var(--dark-text-secondary);
}

.card .text-secondary {
  font-size: 0.85rem;
  margin-bottom: 0.8rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.card .text-secondary::before {
  content: "📅";
  font-size: 0.8rem;
}

.card a {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-weight: 600;
  margin-top: 0.5rem;
  transition: gap 0.25s ease;
}

.card a:hover {
  gap: 0.6rem;
}

/* ---------- 表格 ---------- */
table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin: 1.8rem 0;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.04);
  border: 1px solid var(--border-light);
}

th,
td {
  border: none;
  border-bottom: 1px solid var(--border-light);
  padding: 1rem 1.2rem;
  text-align: left;
}

body.dark-mode th,
body.dark-mode td {
  border-bottom-color: var(--dark-border);
}

th {
  background: linear-gradient(135deg, rgba(176, 92, 122, 0.08), rgba(176, 92, 122, 0.02));
  font-weight: 600;
  color: var(--text-heading-light);
  letter-spacing: 0.4px;
}

body.dark-mode th {
  background: rgba(240, 166, 192, 0.06);
  color: var(--dark-text-heading);
}

tr:last-child td {
  border-bottom: none;
}

tr:hover td {
  background: rgba(176, 92, 122, 0.03);
}

body.dark-mode tr:hover td {
  background: rgba(240, 166, 192, 0.04);
}

/* ---------- FAQ ---------- */
.faq-item {
  border-bottom: 1px solid var(--border-light);
  padding: 1.2rem 0;
  transition: background-color 0.2s ease;
}

body.dark-mode .faq-item {
  border-bottom-color: var(--dark-border);
}

.faq-question {
  font-weight: 600;
  font-size: 1.08rem;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  user-select: none;
  padding: 0.3rem 0.5rem;
  border-radius: 8px;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.faq-question:hover {
  background: var(--primary-soft);
}

body.dark-mode .faq-question:hover {
  background: rgba(240, 166, 192, 0.08);
}

.faq-question span {
  font-size: 1.5rem;
  line-height: 1;
  color: var(--primary);
  transition: transform 0.3s ease;
  display: inline-block;
  font-weight: 300;
}

.faq-item.active .faq-question span {
  transform: rotate(45deg);
}

.faq-answer {
  margin-top: 0.8rem;
  color: var(--text-secondary-light);
  padding: 0 0.5rem 0.3rem;
  display: none;
  animation: fadeSlideDown 0.3s ease-out;
}

body.dark-mode .faq-answer {
  color: var(--dark-text-secondary);
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-block;
  background: linear-gradient(135deg, var(--btn-bg-light), #c96f8d);
  color: var(--btn-text-light);
  padding: 0.8rem 2rem;
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.98rem;
  border: none;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  letter-spacing: 0.3px;
  position: relative;
  overflow: hidden;
  box-shadow: 0 4px 16px rgba(176, 92, 122, 0.25);
}

.btn::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.5s ease;
}

.btn:hover {
  transform: translateY(-2px) scale(1.03);
  box-shadow: 0 8px 24px rgba(176, 92, 122, 0.35);
}

.btn:hover::before {
  left: 100%;
}

.btn:active {
  transform: translateY(0) scale(0.98);
}

body.dark-mode .btn {
  background: linear-gradient(135deg, var(--dark-btn-bg), #e89db4);
  color: var(--dark-btn-text);
  box-shadow: 0 4px 16px rgba(240, 166, 192, 0.2);
}

body.dark-mode .btn:hover {
  box-shadow: 0 8px 24px rgba(240, 166, 192, 0.3);
}

/* ---------- Footer ---------- */
.footer {
  background: var(--bg-footer-light);
  color: var(--text-footer-light);
  padding: 3rem 0 2rem;
  margin-top: 4rem;
  position: relative;
  overflow: hidden;
}

.footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), #e08aa4, var(--primary));
  background-size: 200% 100%;
  animation: gradientMove 4s ease infinite;
}

body.dark-mode .footer {
  background: var(--dark-footer-bg);
  color: var(--dark-text-footer);
}

.footer a {
  color: #cbd5e1;
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color 0.2s ease;
}

.footer a:hover {
  color: #f0a6c0;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2.5rem;
}

.footer-grid h4 {
  color: #f8fafc;
  margin-bottom: 1rem;
  font-size: 1.1rem;
  position: relative;
  display: inline-block;
}

.footer-grid h4::after {
  content: "";
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 30px;
  height: 2px;
  background: linear-gradient(90deg, #f0a6c0, transparent);
  border-radius: 2px;
}

.footer-grid p {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.93rem;
  line-height: 1.9;
}

body.dark-mode .footer-grid p {
  color: rgba(230, 210, 210, 0.7);
}

/* ---------- 返回顶部 ---------- */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background: linear-gradient(135deg, var(--primary), #c96f8d);
  color: white;
  border: none;
  border-radius: 50%;
  width: 52px;
  height: 52px;
  font-size: 1.6rem;
  cursor: pointer;
  display: none;
  z-index: 999;
  box-shadow: 0 8px 24px rgba(176, 92, 122, 0.35);
  transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  line-height: 1;
}

.back-to-top:hover {
  transform: translateY(-4px) scale(1.08);
  box-shadow: 0 12px 32px rgba(176, 92, 122, 0.45);
}

.back-to-top:active {
  transform: scale(0.95);
}

body.dark-mode .back-to-top {
  background: linear-gradient(135deg, var(--dark-btn-bg), #e89db4);
  color: var(--dark-btn-text);
  box-shadow: 0 8px 24px rgba(240, 166, 192, 0.3);
}

/* ---------- 链接与版权行 ---------- */
.link-row {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  font-size: 0.9rem;
  align-items: center;
  padding: 1.2rem 0;
}

.link-row a {
  font-size: 0.9rem;
  padding: 0.2rem 0.4rem;
  border-radius: 6px;
  transition: background-color 0.2s ease;
}

.link-row a:hover {
  background: var(--primary-soft);
}

.link-row span {
  margin-left: auto;
  color: var(--text-secondary-light);
  font-size: 0.85rem;
}

body.dark-mode .link-row span {
  color: var(--dark-text-secondary);
}

/* ---------- 滚动动画（视口进入） ---------- */
@keyframes fadeSlideDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes cardFadeUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes bannerFadeIn {
  from {
    opacity: 0;
    transform: scale(0.98);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes floatPetal {
  0%, 100% {
    transform: translateY(0) rotate(0deg);
  }
  50% {
    transform: translateY(-20px) rotate(5deg);
  }
}

@keyframes gentleSpin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

@keyframes gradientMove {
  0%, 100% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
}

/* 滚动动画 - 使用 IntersectionObserver 由 JS 添加 .visible */
.fade-in-section {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.7s ease-out, transform 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.fade-in-section.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- 响应式适配 ---------- */
@media (max-width: 1024px) {
  .container {
    padding: 0 20px;
  }

  .nav-links {
    gap: 1.2rem;
  }

  .card-grid {
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1.5rem;
  }
}

@media (max-width: 768px) {
  body {
    font-size: 15px;
  }

  .nav-container {
    padding: 0.8rem 1rem;
  }

  .nav-links {
    display: none;
    width: 100%;
    flex-direction: column;
    gap: 0.6rem;
    margin-top: 1rem;
    padding: 1rem 0.5rem;
    background: var(--navbar-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-radius: 16px;
    border: 1px solid var(--border-light);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
  }

  body.dark-mode .nav-links {
    background: var(--dark-navbar-bg);
    border-color: var(--dark-border);
  }

  .nav-links.active {
    display: flex;
    animation: fadeSlideDown 0.3s ease-out;
  }

  .nav-links a {
    padding: 0.7rem 1rem;
    border-radius: 8px;
    width: 100%;
    text-align: center;
    transition: background-color 0.2s ease;
  }

  .nav-links a:hover {
    background: var(--primary-soft);
    transform: none;
  }

  .nav-links a::after {
    display: none;
  }

  .menu-toggle {
    display: block;
  }

  .banner {
    margin: 1rem 0 2rem;
    padding: 2rem 1.2rem;
    border-radius: 20px;
  }

  .banner h2 {
    font-size: 1.5rem;
  }

  .card-grid {
    grid-template-columns: 1fr;
    gap: 1.2rem;
  }

  .card {
    padding: 1.4rem;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
  }

  .back-to-top {
    width: 44px;
    height: 44px;
    font-size: 1.3rem;
    bottom: 1.2rem;
    right: 1.2rem;
  }

  h2 {
    font-size: 1.4rem;
  }

  h3 {
    font-size: 1.2rem;
  }

  .link-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.8rem;
  }

  .link-row span {
    margin-left: 0;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .nav-container {
    padding: 0.7rem 0.8rem;
  }

  .logo {
    font-size: 1.3rem;
  }

  .banner {
    padding: 1.8rem 1rem;
  }

  .banner p {
    font-size: 0.95rem;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 1.8rem;
    text-align: center;
  }

  .footer-grid h4::after {
    left: 50%;
    transform: translateX(-50%);
  }

  table {
    font-size: 0.85rem;
  }

  th,
  td {
    padding: 0.7rem 0.8rem;
  }

  .faq-question {
    font-size: 1rem;
  }
}

/* ---------- 打印优化 ---------- */
@media print {
  .navbar,
  .back-to-top,
  .menu-toggle,
  .btn {
    display: none !important;
  }

  body {
    background: white;
    color: black;
  }

  .card {
    break-inside: avoid;
    box-shadow: none;
    border: 1px solid #ddd;
  }
}

/* ---------- 无障碍与细节 ---------- */
:focus-visible {
  outline: 3px solid rgba(176, 92, 122, 0.5);
  outline-offset: 2px;
  border-radius: 4px;
}

::selection {
  background: rgba(176, 92, 122, 0.25);
  color: var(--text-heading-light);
}

body.dark-mode ::selection {
  background: rgba(240, 166, 192, 0.3);
  color: var(--dark-text-heading);
}

/* 滚动条美化 */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, rgba(176, 92, 122, 0.5), rgba(176, 92, 122, 0.3));
  border-radius: 8px;
}

::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, rgba(176, 92, 122, 0.7), rgba(176, 92, 122, 0.5));
}

body.dark-mode ::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, rgba(240, 166, 192, 0.4), rgba(240, 166, 192, 0.2));
}

/* 减少动画偏好 */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}