/* ============================================================
   男人网站 hellotuan.cn — 完整样式表
   风格：现代男性商务 × 轻奢质感 × 深色玻璃拟态
   ============================================================ */

/* ---------- 全局重置 & 变量 ---------- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* 浅色模式 */
  --bg-body: #F4F6F9;
  --bg-card: #FFFFFF;
  --bg-header: rgba(255, 255, 255, 0.82);
  --bg-footer: #1A2530;
  --text-primary: #1F2A37;
  --text-secondary: #3D4C5C;
  --text-heading: #0E1A26;
  --text-link: #1B5E8C;
  --text-btn: #FFFFFF;
  --border-light: #DCE3EA;
  --btn-bg: #1F3A4D;
  --nav-bg: rgba(255, 255, 255, 0.7);
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.06);
  --shadow-hover: 0 18px 40px rgba(0, 0, 0, 0.1);
  --glass-bg: rgba(255, 255, 255, 0.65);
  --glass-border: rgba(255, 255, 255, 0.4);
  --accent: #E8A33D;
  --accent-strong: #D18A1F;
  --gradient-main: linear-gradient(135deg, #1F2A37 0%, #2C3E50 55%, #3A5068 100%);
  --gradient-banner: linear-gradient(115deg, #14212E 0%, #243B4E 45%, #2E4A62 100%);
  --gradient-card: linear-gradient(145deg, #FFFFFF 0%, #F8FAFC 100%);
  --code-bg: #EEF2F6;
  --success: #2E7D5B;
  --transition: 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);

  /* 暗色模式 */
  --dark-bg: #0D141B;
  --dark-card: #16212B;
  --dark-header: rgba(13, 20, 27, 0.85);
  --dark-text: #D5DEE8;
  --dark-heading: #F0F4F8;
  --dark-secondary: #9FB3C8;
  --dark-link: #7FB5E6;
  --dark-border: #2A3A48;
  --dark-btn: #2E4A5E;
  --dark-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
  --dark-glass: rgba(22, 33, 43, 0.7);
  --dark-glass-border: rgba(255, 255, 255, 0.08);
}

/* ---------- 基础元素 ---------- */
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  background-color: var(--bg-body);
  color: var(--text-primary);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  letter-spacing: 0.01em;
  transition: background-color 0.4s ease, color 0.4s ease;
  overflow-x: hidden;
}

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

img,
svg {
  display: inline-block;
  vertical-align: middle;
  max-width: 100%;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  color: var(--text-heading);
  font-weight: 600;
  line-height: 1.3;
  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-heading);
}

h1 {
  font-size: clamp(2rem, 5vw, 2.8rem);
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(1.6rem, 4vw, 2rem);
  margin: 2.5rem 0 1.2rem;
  padding-left: 1rem;
  border-left: 5px solid var(--accent);
  position: relative;
  letter-spacing: -0.01em;
}

h2::after {
  content: "";
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 60px;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), transparent);
  border-radius: 2px;
}

body.dark-mode h2 {
  border-left-color: var(--accent);
}

h3 {
  font-size: clamp(1.2rem, 3vw, 1.5rem);
  margin: 1.5rem 0 0.8rem;
}

h4 {
  font-size: 1.05rem;
  margin: 1rem 0 0.5rem;
  font-weight: 600;
}

p {
  margin-bottom: 1rem;
  color: var(--text-primary);
  line-height: 1.75;
}

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

a {
  color: var(--text-link);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.25s ease, text-decoration 0.25s ease;
  position: relative;
}

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

a:hover {
  text-decoration: underline;
  color: var(--accent-strong);
}

strong,
b {
  font-weight: 600;
}

ul,
ol {
  padding-left: 1.5rem;
  margin-bottom: 1rem;
}

li {
  margin-bottom: 0.35rem;
}

/* ---------- 容器 ---------- */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 clamp(1rem, 3vw, 2rem);
}

/* ---------- 头部导航 ---------- */
.site-header {
  background: var(--bg-header);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.05);
  position: sticky;
  top: 0;
  z-index: 1000;
  padding: 0.8rem 0;
  transition: background 0.4s ease, box-shadow 0.3s ease;
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

body.dark-mode .site-header {
  background: var(--dark-header);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
  border-bottom-color: var(--dark-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

/* Logo */
.logo a {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-heading);
  text-decoration: none;
  letter-spacing: 0.02em;
  transition: transform 0.3s ease;
}

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

.logo a:hover {
  transform: scale(1.02);
  text-decoration: none;
}

.logo svg {
  filter: drop-shadow(0 2px 6px rgba(0, 0, 0, 0.15));
  transition: transform 0.4s ease;
}

.logo a:hover svg {
  transform: rotate(-5deg) scale(1.05);
}

/* 主导航 */
.main-nav ul {
  display: flex;
  list-style: none;
  gap: 0.2rem;
  flex-wrap: wrap;
}

.main-nav ul li {
  margin: 0;
}

.main-nav ul li a {
  display: inline-block;
  padding: 0.5rem 0.9rem;
  font-weight: 500;
  color: var(--text-primary);
  border-radius: 30px;
  border: 1px solid transparent;
  transition: all 0.3s ease;
  text-decoration: none;
  position: relative;
}

body.dark-mode .main-nav ul li a {
  color: var(--dark-text);
}

.main-nav ul li a::after {
  content: "";
  position: absolute;
  bottom: 4px;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 60%;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
  transition: transform 0.3s ease;
}

.main-nav ul li a:hover {
  color: var(--accent-strong);
  background: rgba(232, 163, 61, 0.08);
  border-color: rgba(232, 163, 61, 0.2);
  text-decoration: none;
}

.main-nav ul li a:hover::after {
  transform: translateX(-50%) scaleX(1);
}

body.dark-mode .main-nav ul li a:hover {
  color: var(--accent);
}

/* 导航操作区 */
.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.7rem;
}

/* 搜索框 */
.search-box {
  display: flex;
  align-items: center;
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: 50px;
  padding: 0.3rem 0.3rem 0.3rem 1rem;
  transition: all 0.3s ease;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.04);
}

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

.search-box:focus-within {
  box-shadow: 0 0 0 3px rgba(232, 163, 61, 0.2);
  border-color: var(--accent);
}

.search-box input {
  border: none;
  background: transparent;
  padding: 0.4rem 0.6rem 0.4rem 0;
  outline: none;
  color: var(--text-primary);
  width: 140px;
  font-size: 0.9rem;
  transition: width 0.3s ease;
}

body.dark-mode .search-box input {
  color: var(--dark-text);
}

.search-box input::placeholder {
  color: var(--text-secondary);
  opacity: 0.7;
}

body.dark-mode .search-box input::placeholder {
  color: var(--dark-secondary);
}

.search-box input:focus {
  width: 170px;
}

.search-box button {
  background: var(--btn-bg);
  border: none;
  cursor: pointer;
  color: white;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
}

body.dark-mode .search-box button {
  background: var(--dark-btn);
}

.search-box button:hover {
  background: var(--accent);
  transform: scale(1.05);
}

/* 主题切换 & 菜单按钮 */
.theme-toggle,
.menu-toggle {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  padding: 0.45rem 0.9rem;
  border-radius: 50px;
  cursor: pointer;
  font-weight: 500;
  color: var(--text-primary);
  transition: all 0.3s ease;
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

body.dark-mode .theme-toggle,
body.dark-mode .menu-toggle {
  background: var(--dark-glass);
  border-color: var(--dark-glass-border);
  color: var(--dark-text);
}

.theme-toggle:hover,
.menu-toggle:hover {
  background: rgba(232, 163, 61, 0.15);
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(232, 163, 61, 0.15);
}

.menu-toggle {
  display: none;
  font-size: 1.2rem;
  padding: 0.35rem 0.8rem;
}

/* 移动端菜单 */
@media (max-width: 960px) {
  .main-nav {
    display: none;
    width: 100%;
    order: 3;
    margin-top: 0.8rem;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: 16px;
    padding: 0.8rem;
    box-shadow: var(--shadow);
    border: 1px solid var(--glass-border);
  }

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

  .main-nav.open {
    display: block;
    animation: slideDown 0.4s ease forwards;
  }

  .main-nav ul {
    flex-direction: column;
    gap: 0.2rem;
  }

  .main-nav ul li a {
    padding: 0.7rem 1rem;
    border-radius: 10px;
    display: block;
  }

  .main-nav ul li a::after {
    display: none;
  }

  .menu-toggle {
    display: inline-flex;
  }

  .header-inner {
    flex-wrap: wrap;
  }
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-block;
  background: var(--btn-bg);
  color: var(--text-btn);
  padding: 0.75rem 2rem;
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.95rem;
  border: none;
  cursor: pointer;
  transition: all 0.35s ease;
  text-decoration: none;
  letter-spacing: 0.02em;
  position: relative;
  overflow: hidden;
  box-shadow: 0 4px 14px rgba(31, 58, 77, 0.2);
}

body.dark-mode .btn {
  background: var(--dark-btn);
  color: white;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.3);
}

.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 0.6s ease;
}

.btn:hover {
  background: var(--accent);
  color: #1A2530;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(232, 163, 61, 0.3);
  text-decoration: none;
}

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

.btn:active {
  transform: translateY(0);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

/* ---------- Banner ---------- */
.banner {
  background: var(--gradient-banner);
  color: white;
  padding: clamp(2.5rem, 6vw, 4.5rem) clamp(1.5rem, 4vw, 3.5rem);
  border-radius: 24px;
  margin: 2rem 0;
  position: relative;
  overflow: hidden;
  isolation: isolate;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.15);
}

.banner::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 85% 20%, rgba(232, 163, 61, 0.2) 0%, transparent 40%),
    radial-gradient(circle at 15% 80%, rgba(255, 255, 255, 0.08) 0%, transparent 35%);
  z-index: -1;
}

.banner::after {
  content: "";
  position: absolute;
  top: -50%;
  right: -20%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(232, 163, 61, 0.15) 0%, transparent 70%);
  border-radius: 50%;
  animation: floatBubble 8s ease-in-out infinite alternate;
  z-index: -1;
}

@keyframes floatBubble {
  0% {
    transform: translate(0, 0) scale(1);
  }
  100% {
    transform: translate(-30px, 20px) scale(1.1);
  }
}

.banner h2,
.banner p {
  color: white !important;
}

.banner h2 {
  font-size: clamp(1.8rem, 4.5vw, 2.6rem);
  border-left: none;
  padding-left: 0;
  margin-bottom: 1rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.2);
}

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

.banner p {
  font-size: clamp(1rem, 2.5vw, 1.2rem);
  max-width: 600px;
  opacity: 0.9;
  margin-bottom: 2rem;
  line-height: 1.8;
}

.banner .btn {
  background: var(--accent);
  color: #1A2530;
  font-weight: 700;
  box-shadow: 0 8px 24px rgba(232, 163, 61, 0.35);
}

.banner .btn:hover {
  background: white;
  color: var(--btn-bg);
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 12px 30px rgba(255, 255, 255, 0.2);
}

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

.card {
  background: var(--gradient-card);
  border-radius: 20px;
  padding: 2rem 1.8rem;
  box-shadow: var(--shadow);
  transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  border: 1px solid rgba(255, 255, 255, 0.6);
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

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

.card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--accent), transparent);
  opacity: 0;
  transition: opacity 0.4s ease;
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(232, 163, 61, 0.3);
}

.card:hover::before {
  opacity: 1;
}

body.dark-mode .card:hover {
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.card h3 {
  margin-top: 0.2rem;
  font-size: 1.3rem;
  transition: color 0.3s ease;
}

.card:hover h3 {
  color: var(--accent-strong);
}

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

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

.card a {
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.card a::after {
  content: "→";
  transition: transform 0.3s ease;
}

.card a:hover::after {
  transform: translateX(4px);
}

/* ---------- Section 通用 ---------- */
section {
  margin-bottom: 3rem;
}

/* 区块内布局 */
.section-row {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
}

.section-row > * {
  flex: 1;
  min-width: 260px;
}

/* 侧边信息卡片 */
.info-card {
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  padding: 1.8rem;
  border-radius: 20px;
  box-shadow: var(--shadow);
  border: 1px solid var(--glass-border);
  transition: all 0.3s ease;
}

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

.info-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.info-card h4 {
  margin-top: 0;
  color: var(--accent);
  font-size: 1.1rem;
  margin-bottom: 1rem;
}

.info-card p {
  margin-bottom: 0.7rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.95rem;
}

/* 内容区块 */
.content-block {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding: 1.8rem;
  border-radius: 20px;
  box-shadow: var(--shadow);
  border: 1px solid var(--glass-border);
  margin-bottom: 1.5rem;
  transition: all 0.3s ease;
}

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

.content-block:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}

/* ---------- 文章卡片 ---------- */
.article-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

.article-card {
  background: var(--bg-card);
  border-radius: 16px;
  padding: 1.5rem;
  box-shadow: var(--shadow);
  border: 1px solid var(--border-light);
  transition: all 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  position: relative;
  overflow: hidden;
}

body.dark-mode .article-card {
  background: var(--dark-card);
  border-color: var(--dark-border);
}

.article-card::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), transparent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}

.article-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-hover);
}

.article-card:hover::after {
  transform: scaleX(1);
}

.article-date {
  font-size: 0.8rem;
  color: var(--accent);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.article-card h4 {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 600;
}

.article-card h3 {
  margin: 0;
  font-size: 1.15rem;
  font-weight: 600;
  line-height: 1.5;
}

.article-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 0.3rem;
  flex-grow: 1;
}

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

.article-card a {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-link);
}

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

.article-card a:hover {
  color: var(--accent);
}

/* ---------- HowTo ---------- */
.howto-box {
  background: var(--gradient-card);
  padding: 2rem;
  border-radius: 24px;
  box-shadow: var(--shadow);
  position: relative;
  overflow: hidden;
}

body.dark-mode .howto-box {
  background: var(--dark-card);
}

.howto-box::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, rgba(232, 163, 61, 0.08) 0%, transparent 70%);
  border-radius: 50%;
}

.howto-box h3 {
  margin-top: 0;
  color: var(--accent);
}

.howto-box p {
  margin-bottom: 0.8rem;
}

.howto-box strong {
  color: var(--text-heading);
}

body.dark-mode .howto-box strong {
  color: var(--dark-heading);
}

/* ---------- FAQ ---------- */
.faq-item {
  border-bottom: 1px solid var(--border-light);
  padding: 0;
  margin-bottom: 0;
  transition: border-color 0.3s ease;
  overflow: hidden;
}

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

.faq-question {
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 1.05rem;
  color: var(--text-heading);
  padding: 1.2rem 0;
  transition: all 0.3s ease;
  user-select: none;
  position: relative;
}

body.dark-mode .faq-question {
  color: var(--dark-heading);
}

.faq-question:hover {
  color: var(--accent);
}

.faq-question span {
  font-size: 1.4rem;
  font-weight: 300;
  transition: transform 0.4s ease;
  display: inline-block;
  color: var(--accent);
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(232, 163, 61, 0.1);
  flex-shrink: 0;
}

.faq-item.active .faq-question span {
  transform: rotate(45deg);
  background: var(--accent);
  color: white;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  color: var(--text-primary);
}

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

.faq-item.active .faq-answer {
  max-height: 500px;
  margin-top: 0;
  padding-bottom: 1rem;
}

.faq-answer p {
  margin-bottom: 0;
  padding: 0 1.5rem 0 0;
  font-size: 0.95rem;
}

/* ---------- 表格 ---------- */
table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin: 1.5rem 0;
  background: var(--bg-card);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: var(--shadow);
  border: 1px solid var(--border-light);
}

body.dark-mode table {
  background: var(--dark-card);
  border-color: var(--dark-border);
}

th,
td {
  padding: 0.9rem 1.2rem;
  text-align: left;
  border-bottom: 1px solid var(--border-light);
  color: var(--text-primary);
  font-size: 0.95rem;
}

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

th {
  background: linear-gradient(135deg, #E9EDF2, #F0F3F7);
  font-weight: 600;
  letter-spacing: 0.02em;
}

body.dark-mode th {
  background: linear-gradient(135deg, #243545, #2A3A4A);
}

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

tr {
  transition: background 0.2s ease;
}

tbody tr:hover {
  background: rgba(232, 163, 61, 0.04);
}

body.dark-mode tbody tr:hover {
  background: rgba(232, 163, 61, 0.06);
}

/* ---------- 联系区块 ---------- */
.contact-info p {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.7rem;
}

.contact-info p strong {
  color: var(--text-heading);
}

body.dark-mode .contact-info p strong {
  color: var(--dark-heading);
}

/* ---------- 页脚 ---------- */
.site-footer {
  background: var(--bg-footer);
  color: #E5E7EB;
  padding: 3rem 0 0;
  margin-top: 4rem;
  position: relative;
}

body.dark-mode .site-footer {
  background: #0A1118;
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(232, 163, 61, 0.4), transparent);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2.5rem;
  padding-bottom: 2rem;
}

@media (max-width: 700px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
  }
}

@media (max-width: 480px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

.site-footer h4 {
  color: #FFFFFF;
  font-size: 1.1rem;
  margin-bottom: 1rem;
  position: relative;
  padding-bottom: 0.5rem;
}

.site-footer h4::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 30px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
}

.site-footer a {
  color: #B0C4DE;
  text-decoration: none;
  transition: color 0.3s ease, padding-left 0.3s ease;
  display: inline-block;
  padding: 0.15rem 0;
}

.site-footer a:hover {
  color: var(--accent);
  padding-left: 6px;
  text-decoration: none;
}

.site-footer p {
  color: #CBD5E1;
  font-size: 0.9rem;
  line-height: 1.8;
}

.copyright {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 1.5rem 0;
  margin-top: 0;
  text-align: center;
  color: #9AAFC5;
  font-size: 0.85rem;
}

.copyright p {
  color: inherit;
  font-size: inherit;
  margin: 0;
}

/* ---------- 返回顶部 ---------- */
#backTop {
  position: fixed;
  bottom: 30px;
  right: 30px;
  background: var(--btn-bg);
  color: white;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  font-size: 1.4rem;
  z-index: 999;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

body.dark-mode #backTop {
  background: var(--dark-btn);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
}

#backTop.show {
  opacity: 1;
  visibility: visible;
}

#backTop:hover {
  background: var(--accent);
  color: #1A2530;
  transform: translateY(-4px) scale(1.05);
  box-shadow: 0 10px 30px rgba(232, 163, 61, 0.4);
}

#backTop:active {
  transform: translateY(0) scale(0.95);
}

/* ---------- 滚动动画 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94),
              transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  will-change: opacity, transform;
}

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

/* 交错延迟 */
.reveal:nth-child(2) {
  transition-delay: 0.1s;
}

.reveal:nth-child(3) {
  transition-delay: 0.2s;
}

/* ---------- 响应式细节 ---------- */
@media (max-width: 768px) {
  body {
    font-size: 15px;
  }

  h2 {
    font-size: 1.5rem;
  }

  .banner {
    padding: 2rem 1.5rem;
    border-radius: 18px;
  }

  .banner p {
    font-size: 1rem;
  }

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

  .article-grid {
    grid-template-columns: 1fr;
  }

  .section-row {
    flex-direction: column;
  }

  .search-box input {
    width: 90px;
  }

  .search-box input:focus {
    width: 120px;
  }

  #backTop {
    bottom: 20px;
    right: 20px;
    width: 42px;
    height: 42px;
    font-size: 1.2rem;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 0.8rem;
  }

  .logo a {
    font-size: 1.2rem;
  }

  .logo svg {
    width: 30px;
    height: 30px;
  }

  .search-box {
    display: none;
  }

  .card {
    padding: 1.5rem;
  }

  .howto-box {
    padding: 1.5rem;
  }

  .faq-question {
    font-size: 0.95rem;
  }
}

/* ---------- 暗色模式细节优化 ---------- */
body.dark-mode .search-box button {
  color: white;
}

body.dark-mode .btn {
  border-color: transparent;
}

body.dark-mode .card a::after {
  color: var(--accent);
}

/* ---------- 滚动条 ---------- */
::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  background: var(--bg-body);
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, #2C3E50, #1A2530);
  border-radius: 10px;
  border: 2px solid var(--bg-body);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--accent);
}

body.dark-mode ::-webkit-scrollbar-track {
  background: var(--dark-bg);
}

body.dark-mode ::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, #3A4A5A, #243545);
  border-color: var(--dark-bg);
}

/* ---------- 选中文本 ---------- */
::selection {
  background: rgba(232, 163, 61, 0.3);
  color: var(--text-heading);
}

body.dark-mode ::selection {
  background: rgba(232, 163, 61, 0.4);
  color: white;
}

/* ---------- 焦点可见性 ---------- */
:focus-visible {
  outline: 3px solid rgba(232, 163, 61, 0.5);
  outline-offset: 2px;
  border-radius: 4px;
}

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

  .reveal {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 打印样式 ---------- */
@media print {
  .site-header,
  .site-footer,
  #backTop,
  .search-box,
  .theme-toggle,
  .menu-toggle,
  .banner .btn {
    display: none !important;
  }

  body {
    background: white;
    color: black;
  }

  .card,
  .content-block,
  .howto-box {
    box-shadow: none;
    border: 1px solid #ccc;
    break-inside: avoid;
  }

  a {
    color: black;
    text-decoration: underline;
  }
}