```css
/* ============================================
   7777影院 - 完整样式表
   风格：现代影视流媒体 / 深蓝主色调 + 渐变光效
   支持：响应式、暗色模式、动画
   ============================================ */

/* ==== 设计变量 ==== */
:root {
  /* 浅色模式 */
  --bg-body: #f0f4fa;
  --bg-card: #ffffff;
  --bg-header: rgba(255, 255, 255, 0.85);
  --bg-footer: #0b1a2a;
  --bg-gradient: linear-gradient(135deg, #0b4f8a 0%, #1a6bb5 50%, #2a8fd4 100%);
  --bg-hero-pattern: radial-gradient(ellipse at top left, rgba(10, 75, 138, 0.08), transparent 60%);
  --text-primary: #1f2a3d;
  --text-secondary: #3a4a5e;
  --text-heading: #0f1e30;
  --text-accent: #0a4b8a;
  --text-link: #0b5cad;
  --text-btn: #ffffff;
  --btn-bg: #0b4f8a;
  --btn-bg-hover: #0d5fa8;
  --border-light: #d9e2ee;
  --shadow: 0 8px 24px rgba(11, 79, 138, 0.08);
  --shadow-hover: 0 16px 36px rgba(11, 79, 138, 0.16);
  --nav-bg: rgba(255, 255, 255, 0.92);
  --input-bg: #ffffff;
  --text-placeholder: #5b6f82;
  --text-copyright: #cbd5e1;
  --card-title: #1f2937;
  --text-footer: #b8c9dd;
  --text-footer-head: #f1f5f9;
  --tag-bg: #e9edf4;
  --tag-text: #1f2a44;
  --faq-border: #dce5f0;
  --hover-lift: translateY(-6px);
  --transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 8px;
  --glass-bg: rgba(255, 255, 255, 0.75);
  --glass-border: rgba(255, 255, 255, 0.5);
  --backdrop-blur: blur(12px);
}

/* 暗黑模式 */
[data-theme="dark"] {
  --bg-body: #0b111c;
  --bg-card: #1a2332;
  --bg-header: rgba(13, 20, 31, 0.9);
  --bg-footer: #070d16;
  --bg-gradient: linear-gradient(135deg, #0a1a2e 0%, #0f2b4a 50%, #123a5e 100%);
  --bg-hero-pattern: radial-gradient(ellipse at top left, rgba(120, 180, 255, 0.1), transparent 60%);
  --text-primary: #e8eff8;
  --text-secondary: #c0cfdf;
  --text-heading: #f4f8fc;
  --text-accent: #8fc7ff;
  --text-link: #7cb8f7;
  --text-btn: #0b1a2e;
  --btn-bg: #8fc7ff;
  --btn-bg-hover: #a8d4ff;
  --border-light: #2b3f57;
  --shadow: 0 8px 24px rgba(0, 0, 0, 0.6);
  --shadow-hover: 0 16px 40px rgba(0, 0, 0, 0.8);
  --nav-bg: rgba(13, 20, 31, 0.95);
  --input-bg: #1e293b;
  --text-placeholder: #8aa0b8;
  --text-copyright: #a0b3c7;
  --card-title: #f1f5f9;
  --text-footer: #a5bcd4;
  --text-footer-head: #f8fafc;
  --tag-bg: #2d3f57;
  --tag-text: #eaf0f7;
  --faq-border: #2b3f57;
  --glass-bg: rgba(26, 35, 50, 0.8);
  --glass-border: rgba(255, 255, 255, 0.08);
}

/* ==== 基础重置 ==== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg-body);
  color: var(--text-primary);
  line-height: 1.7;
  font-size: 16px;
  overflow-x: hidden;
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* 渐变背景装饰 */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--bg-hero-pattern);
  background-size: cover;
  pointer-events: none;
  z-index: -1;
}

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

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

a:hover {
  color: var(--btn-bg-hover);
  text-decoration: none;
}

h1, h2, h3, h4, h5, h6 {
  color: var(--text-heading);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.01em;
}

h1 {
  font-size: clamp(2rem, 4.5vw, 3.2rem);
  margin-bottom: 1rem;
  font-weight: 800;
}

h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  margin: 2.5rem 0 1.5rem;
  border-left: 6px solid var(--btn-bg);
  padding-left: 1rem;
  position: relative;
}

h2::after {
  content: "";
  display: block;
  width: 60px;
  height: 3px;
  background: var(--bg-gradient);
  border-radius: 2px;
  margin-top: 8px;
}

h3 {
  font-size: 1.35rem;
  margin: 1.2rem 0 0.8rem;
  font-weight: 600;
}

h4 {
  font-size: 1.1rem;
  margin: 1rem 0 0.5rem;
  color: var(--text-secondary);
  font-weight: 600;
}

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

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

section {
  padding: 2rem 0;
}

/* ==== 头部导航 ==== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--bg-header);
  backdrop-filter: var(--backdrop-blur);
  -webkit-backdrop-filter: var(--backdrop-blur);
  border-bottom: 1px solid var(--border-light);
  transition: all 0.3s ease;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
  gap: 20px;
}

.logo-area {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.logo-text {
  font-size: 1.7rem;
  font-weight: 800;
  background: var(--bg-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: 1px;
  line-height: 1.2;
}

.logo-text span {
  -webkit-text-fill-color: #e8a33d;
  background: none;
  font-weight: 800;
}

/* 导航链接 */
.nav-links {
  display: flex;
  gap: 8px;
  align-items: center;
}

.nav-links a {
  padding: 8px 16px;
  border-radius: 30px;
  font-weight: 500;
  color: var(--text-heading);
  transition: var(--transition);
  position: relative;
  font-size: 0.95rem;
}

.nav-links a:hover {
  background: var(--tag-bg);
  color: var(--btn-bg);
  transform: translateY(-2px);
}

.nav-links a::after {
  content: "";
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--btn-bg);
  transition: width 0.3s ease;
  border-radius: 2px;
}

.nav-links a:hover::after {
  width: 60%;
}

/* 头部操作区 */
.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.search-box {
  display: flex;
  align-items: center;
  background: var(--input-bg);
  border: 1px solid var(--border-light);
  border-radius: 50px;
  padding: 4px 4px 4px 18px;
  transition: box-shadow 0.3s ease;
  overflow: hidden;
}

.search-box:focus-within {
  box-shadow: 0 0 0 3px rgba(11, 92, 173, 0.2);
  border-color: var(--btn-bg);
}

.search-box input {
  border: none;
  background: transparent;
  color: var(--text-primary);
  padding: 8px 4px;
  width: 130px;
  outline: none;
  font-size: 0.9rem;
  transition: width 0.3s ease;
}

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

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

.search-box button {
  background: var(--btn-bg);
  color: var(--text-btn);
  border: none;
  border-radius: 50px;
  padding: 8px 20px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
  font-size: 0.9rem;
}

.search-box button:hover {
  background: var(--btn-bg-hover);
  transform: scale(1.03);
}

/* 主题切换按钮 */
.theme-toggle {
  background: var(--tag-bg);
  border: none;
  border-radius: 50px;
  padding: 8px 14px;
  color: var(--tag-text);
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  font-size: 1.2rem;
  line-height: 1;
}

.theme-toggle:hover {
  transform: rotate(20deg) scale(1.1);
  background: var(--border-light);
}

/* 移动菜单按钮 */
.mobile-menu-btn {
  display: none;
  background: var(--tag-bg);
  border: none;
  border-radius: 10px;
  font-size: 1.6rem;
  color: var(--text-heading);
  cursor: pointer;
  padding: 4px 12px;
  transition: var(--transition);
  line-height: 1.4;
}

.mobile-menu-btn:hover {
  background: var(--border-light);
}

/* 移动导航 */
.mobile-nav {
  display: none;
  flex-direction: column;
  background: var(--bg-card);
  border-top: 1px solid var(--border-light);
  padding: 8px 20px 16px;
  box-shadow: var(--shadow);
  animation: slideDown 0.3s ease;
}

.mobile-nav a {
  padding: 12px 8px;
  border-bottom: 1px solid var(--border-light);
  color: var(--text-heading);
  font-weight: 500;
  transition: padding-left 0.2s ease;
}

.mobile-nav a:hover {
  padding-left: 16px;
  color: var(--btn-bg);
}

.mobile-nav a:last-child {
  border-bottom: none;
}

.mobile-nav.active {
  display: flex;
}

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

/* ==== Hero 区域 ==== */
.hero {
  padding: 4rem 0;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--bg-gradient);
  opacity: 0.05;
  border-radius: 30px;
  margin: 1rem 24px;
  filter: blur(40px);
  pointer-events: none;
}

.hero-grid {
  display: flex;
  align-items: center;
  gap: 50px;
  flex-wrap: wrap;
  position: relative;
  z-index: 1;
}

.hero-content {
  flex: 1 1 400px;
}

.hero-content h1 {
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  margin-bottom: 1.2rem;
  letter-spacing: -0.02em;
}

.hero-highlight {
  background: var(--bg-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: 800;
}

.hero-content p {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 600px;
  line-height: 1.8;
}

.hero-cta {
  display: flex;
  gap: 16px;
  margin-top: 32px;
  flex-wrap: wrap;
}

.btn-primary,
.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 1.05rem;
  transition: var(--transition);
  cursor: pointer;
  border: none;
  text-decoration: none;
  gap: 8px;
}

.btn-primary {
  background: var(--btn-bg);
  color: var(--text-btn);
  box-shadow: 0 4px 16px rgba(11, 79, 138, 0.3);
}

.btn-primary:hover {
  background: var(--btn-bg-hover);
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(11, 79, 138, 0.4);
  color: var(--text-btn);
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--btn-bg);
  color: var(--btn-bg);
}

.btn-outline:hover {
  background: var(--btn-bg);
  color: var(--text-btn);
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(11, 79, 138, 0.2);
}

.hero-visual {
  flex: 1 1 320px;
  text-align: center;
  animation: float 6s ease-in-out infinite;
}

.hero-visual svg {
  border-radius: 24px;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.hero-visual svg:hover {
  transform: scale(1.02);
  box-shadow: var(--shadow-hover);
}

@keyframes float {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-15px);
  }
}

/* ==== 通用卡片网格 ==== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
  margin: 2rem 0;
}

.card {
  background: var(--glass-bg);
  backdrop-filter: var(--backdrop-blur);
  -webkit-backdrop-filter: var(--backdrop-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 26px;
  box-shadow: var(--shadow);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--bg-gradient);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.card:hover {
  transform: var(--hover-lift);
  box-shadow: var(--shadow-hover);
  border-color: var(--btn-bg);
}

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

.card h3 {
  color: var(--card-title);
  font-size: 1.25rem;
  margin-bottom: 0.6rem;
  transition: color 0.2s ease;
}

.card:hover h3 {
  color: var(--btn-bg);
}

.card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

.card h4 {
  color: var(--card-title);
  font-size: 1rem;
  margin-bottom: 0.5rem;
}

/* 文章卡片 */
.article-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.article-list .card {
  padding: 24px;
  border-radius: var(--radius-md);
}

.article-list .card h3 {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
}

.article-list .card p {
  font-size: 0.9rem;
  margin-bottom: 0.8rem;
}

.article-list .card a {
  font-weight: 600;
  font-size: 0.95rem;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.article-list .card a:hover {
  gap: 8px;
}

.article-list .card a::after {
  content: "→";
  transition: transform 0.2s ease;
}

.article-list .card a:hover::after {
  transform: translateX(3px);
}

/* 标签 */
.badge {
  display: inline-block;
  background: var(--bg-gradient);
  color: #fff;
  padding: 4px 14px;
  border-radius: 30px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  box-shadow: 0 2px 8px rgba(11, 79, 138, 0.2);
}

/* 面包屑 */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 1rem 0;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.breadcrumb a {
  color: var(--text-link);
  transition: color 0.2s;
}

.breadcrumb a:hover {
  color: var(--btn-bg);
}

.breadcrumb span {
  margin: 0 2px;
}

/* 表格 */
.table-wrap {
  overflow-x: auto;
  border-radius: var(--radius-md);
  background: var(--bg-card);
  box-shadow: var(--shadow);
}

table {
  width: 100%;
  border-collapse: collapse;
  background: var(--bg-card);
  border-radius: var(--radius-md);
  overflow: hidden;
}

th, td {
  padding: 14px 18px;
  border-bottom: 1px solid var(--border-light);
  text-align: left;
  font-size: 0.95rem;
}

th {
  background: var(--tag-bg);
  color: var(--text-heading);
  font-weight: 600;
  white-space: nowrap;
}

tr:hover td {
  background: var(--tag-bg);
}

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

/* FAQ */
.faq-item {
  background: var(--bg-card);
  margin-bottom: 12px;
  border-radius: var(--radius-md);
  border: 1px solid var(--faq-border);
  transition: var(--transition);
  overflow: hidden;
}

.faq-item:hover {
  border-color: var(--btn-bg);
  box-shadow: var(--shadow);
}

.faq-question {
  padding: 18px 22px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-heading);
  font-size: 1.05rem;
  transition: background-color 0.2s ease;
  position: relative;
}

.faq-question::after {
  content: "+";
  font-size: 1.5rem;
  font-weight: 300;
  color: var(--btn-bg);
  transition: transform 0.3s ease;
  margin-left: 16px;
  flex-shrink: 0;
}

.faq-item.open .faq-question::after {
  transform: rotate(45deg);
}

.faq-question:hover {
  background: var(--tag-bg);
}

.faq-answer {
  padding: 0 22px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
  color: var(--text-secondary);
  line-height: 1.8;
}

.faq-item.open .faq-answer {
  padding: 0 22px 20px;
  max-height: 500px;
}

/* HowTo */
.howto-step {
  background: var(--bg-card);
  padding: 20px 24px;
  border-radius: var(--radius-md);
  margin: 12px 0;
  border-left: 4px solid var(--btn-bg);
  transition: var(--transition);
  box-shadow: var(--shadow);
}

.howto-step:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow-hover);
}

.howto-step strong {
  color: var(--text-heading);
  margin-right: 8px;
}

/* ==== Footer ==== */
.site-footer {
  background: var(--bg-footer);
  color: var(--text-footer);
  padding: 4rem 0 1.5rem;
  margin-top: 4rem;
  position: relative;
  overflow: hidden;
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--bg-gradient);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 32px;
  margin-bottom: 2.5rem;
}

.footer-grid h4 {
  color: var(--text-footer-head);
  margin-bottom: 16px;
  font-size: 1.1rem;
  font-weight: 600;
  position: relative;
  padding-bottom: 10px;
}

.footer-grid h4::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 30px;
  height: 2px;
  background: var(--btn-bg);
}

.footer-grid a {
  color: var(--text-footer);
  display: block;
  margin: 8px 0;
  font-size: 0.9rem;
  transition: var(--transition);
}

.footer-grid a:hover {
  color: var(--btn-bg-hover);
  padding-left: 6px;
}

.footer-copyright {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  margin-top: 2rem;
  padding-top: 1.8rem;
  text-align: center;
  color: var(--text-copyright);
  font-size: 0.85rem;
}

.footer-copyright p {
  color: var(--text-copyright);
  font-size: 0.85rem;
  margin-bottom: 0.5rem;
}

/* 返回顶部 */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  background: var(--btn-bg);
  color: var(--text-btn);
  border: none;
  padding: 14px 18px;
  border-radius: 50px;
  font-size: 1.2rem;
  cursor: pointer;
  box-shadow: var(--shadow);
  transition: var(--transition);
  opacity: 0;
  visibility: hidden;
  z-index: 999;
  line-height: 1;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background: var(--btn-bg-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

/* 滚动动画 */
.scroll-animate {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.scroll-animate.visible {
  opacity: 1;
  transform: translateY(0);
}

/* 通用区块标题 */
.section-title {
  margin-top: 3rem;
  font-size: 2rem;
  text-align: center;
  position: relative;
  padding-bottom: 1rem;
}

.section-title::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 3px;
  background: var(--bg-gradient);
  border-radius: 3px;
}

/* 区块描述 */
.section-desc {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 3rem;
  color: var(--text-secondary);
  font-size: 1.05rem;
}

/* SEO 友好文本样式 */
.seo-text {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow);
  line-height: 1.9;
}

.seo-text h2 {
  margin-top: 0;
}

/* 联系区块 */
#contact {
  padding-bottom: 3rem;
}

#contact p {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 0;
}

#contact p::before {
  content: "•";
  color: var(--btn-bg);
  font-weight: bold;
  font-size: 1.2rem;
}

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

  .header-inner {
    gap: 12px;
  }

  .search-box input {
    width: 100px;
  }

  .search-box input:focus {
    width: 130px;
  }
}

@media (max-width: 900px) {
  .nav-links {
    display: none;
  }

  .mobile-menu-btn {
    display: block;
  }

  .mobile-nav.active {
    display: flex;
  }

  .hero-grid {
    gap: 30px;
  }

  .hero-content h1 {
    font-size: 2.2rem;
  }

  .hero-visual {
    flex: 1 1 100%;
    order: -1;
  }

  .hero-visual svg {
    max-width: 280px;
    margin: 0 auto;
  }

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

  .footer-grid {
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 24px;
  }
}

@media (max-width: 700px) {
  body {
    font-size: 15px;
  }

  .container {
    padding: 0 16px;
  }

  section {
    padding: 1.5rem 0;
  }

  h1 {
    font-size: 1.9rem;
  }

  h2 {
    font-size: 1.5rem;
    margin: 2rem 0 1.2rem;
  }

  h3 {
    font-size: 1.2rem;
  }

  .hero {
    padding: 2rem 0;
  }

  .hero-content h1 {
    font-size: 1.9rem;
  }

  .hero-content p {
    font-size: 1rem;
  }

  .hero-cta {
    flex-direction: column;
  }

  .btn-primary,
  .btn-outline {
    width: 100%;
  }

  .card-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

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

  .logo-text {
    font-size: 1.4rem;
  }

  .search-box {
    order: 3;
    flex: 1 1 100%;
    margin-top: 8px;
  }

  .search-box input {
    flex: 1;
    width: auto;
  }

  .search-box input:focus {
    width: auto;
  }

  .theme-toggle {
    padding: 6px 10px;
    font-size: 1rem;
  }

  .mobile-menu-btn {
    padding: 2px 8px;
    font-size: 1.4rem;
  }

  .back-to-top {
    bottom: 20px;
    right: 20px;
    padding: 12px 16px;
  }

  .faq-question {
    font-size: 0.95rem;
    padding: 16px 16px;
  }

  .faq-item.open .faq-answer {
    padding: 0 16px 16px;
  }

  .howto-step {
    padding: 16px;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }
}

@media (max-width: 480px) {
  .logo-text {
    font-size: 1.2rem;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .hero-visual svg {
    max-width: 220px;
  }

  .btn-primary,
  .btn-outline {
    font-size: 0.95rem;
    padding: 12px 24px;
  }
}

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

  .hero-visual {
    animation: none;
  }
}

/* 打印样式 */
@media print {
  .site-header,
  .site-footer,
  .back-to-top,
  .hero-cta,
  .search-box,
  .theme-toggle,
  .mobile-menu-btn,
  .mobile-nav {
    display: none !important;
  }

  body {
    background: white;
    color: black;
  }

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