/* ========================================
   555电影网 · 复古影像美学设计系统
   米白底 × 番茄红 × 靛蓝 × 琥珀金
   ======================================== */

:root {
  --primary: #E4572E;
  --primary-light: #F07850;
  --primary-dark: #C73E1D;
  --secondary: #1D4E89;
  --tertiary: #F2A541;
  --bg-main: #FDF8F0;
  --bg-alt: #F0E8D8;
  --text: #2A2725;
  --text-muted: #6E6A64;
  --white: #FFFFFF;
  --shadow-sm: 0 2px 10px rgba(42,39,37,0.05);
  --shadow-md: 0 6px 24px rgba(42,39,37,0.07);
  --shadow-lg: 0 14px 36px rgba(228,87,46,0.14);
  --radius: 16px;
}

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

body { 
  font-family: system-ui, 'PingFang SC', 'Microsoft YaHei', sans-serif; 
  overflow-x: hidden;
  background-color: var(--bg-main);
  background-image: 
    radial-gradient(circle at 90% 10%, rgba(242,165,65,0.04) 0%, transparent 40%),
    radial-gradient(circle at 10% 90%, rgba(228,87,46,0.03) 0%, transparent 50%);
  color: var(--text);
  line-height: 1.75;
  letter-spacing: 0.01em;
  font-size: 16px;
}

/* ========== 核心布局 ========== */
.container { max-width:1200px; margin:0 auto; padding:0 24px; }
.section { padding:88px 0; position:relative; }

.section:nth-child(even) { 
  background-color: var(--bg-alt);
  background-image: 
    radial-gradient(circle at 15% 85%, rgba(228,87,46,0.04) 0%, transparent 45%),
    radial-gradient(circle at 90% 10%, rgba(242,165,65,0.05) 0%, transparent 40%);
}

/* ========== 导航 ========== */
.site-header { 
  position: fixed; 
  top: 0; 
  left: 0; 
  width: 100%; 
  z-index: 1000; 
  background: rgba(253,248,240,0.88); 
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid rgba(42,39,37,0.05);
  transition: box-shadow 0.3s ease;
}
.site-header:hover { box-shadow: 0 4px 20px rgba(42,39,37,0.04); }

.header-inner { 
  display: flex; 
  align-items: center; 
  justify-content: space-between; 
  height: 74px; 
  max-width: 1200px; 
  margin: 0 auto; 
  padding: 0 24px; 
}

.logo { 
  display: flex; 
  align-items: center; 
  gap: 12px; 
  font-weight: 800; 
  font-size: 1.25rem; 
  text-decoration: none; 
  color: var(--text);
  letter-spacing: -0.5px;
}

.logo-icon { 
  width: 40px; 
  height: 40px; 
  border-radius: 12px; 
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  color: #fff;
  display: flex; 
  align-items: center; 
  justify-content: center; 
  font-size: 0.95rem;
  font-weight: 800;
  box-shadow: 0 4px 14px rgba(228,87,46,0.28);
  transition: transform 0.3s ease;
}
.logo:hover .logo-icon { transform: rotate(-8deg) scale(1.05); }

.main-nav { display: flex; align-items: center; gap: 30px; list-style: none; }

.main-nav a { 
  text-decoration: none; 
  font-size: 0.9rem; 
  font-weight: 500; 
  transition: color 0.25s; 
  color: var(--text);
  position: relative;
  padding: 6px 0;
}

.main-nav a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--primary), var(--tertiary));
  transition: width 0.35s ease;
}
.main-nav a:hover { color: var(--primary); }
.main-nav a:hover::after { width: 100%; }

.nav-cta { 
  padding: 9px 26px; 
  border-radius: 50px; 
  color: #fff !important; 
  font-weight: 600;
  background: var(--primary);
  box-shadow: 0 4px 16px rgba(228,87,46,0.25);
  transition: all 0.3s ease;
}
.nav-cta::after { display: none; }
.nav-cta:hover { 
  background: var(--primary-dark); 
  transform: translateY(-1px); 
  color: #fff !important;
  box-shadow: 0 6px 20px rgba(228,87,46,0.3);
}

.menu-toggle { 
  display: none; 
  background: none; 
  border: none; 
  cursor: pointer; 
  font-size: 1.5rem; 
  color: var(--text);
  padding: 8px;
  border-radius: 8px;
  transition: background 0.2s;
}
.menu-toggle:hover { background: rgba(228,87,46,0.06); }

/* ========== Hero ========== */
.hero { 
  min-height: 72vh; 
  display: flex; 
  align-items: center; 
  position: relative;
  padding-top: 130px;
  padding-bottom: 80px;
  background: linear-gradient(
    115deg, 
    var(--bg-main) 0%, 
    #FBEADD 50%, 
    #FAD6C6 100%
  );
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  right: -80px;
  top: 50%;
  transform: translateY(-50%);
  width: 480px;
  height: 480px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(242,165,65,0.12) 0%, transparent 65%);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  right: 10%;
  top: 62%;
  transform: translateY(-50%);
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--tertiary);
  box-shadow:
    0 0 0 22px rgba(242,165,65,0.18),
    0 0 0 44px rgba(242,165,65,0.10),
    0 0 0 72px rgba(242,165,65,0.05);
  pointer-events: none;
  opacity: 0.6;
}

.hero-content { 
  max-width: 720px; 
  position: relative; 
  z-index: 2;
}

.hero-eyebrow { 
  display: inline-block; 
  font-size: 0.78rem; 
  font-weight: 700; 
  padding: 6px 18px; 
  border-radius: 50px; 
  margin-bottom: 22px;
  background: rgba(228,87,46,0.08);
  color: var(--primary);
  letter-spacing: 0.5px;
  border: 1px solid rgba(228,87,46,0.12);
  backdrop-filter: blur(4px);
}

.hero h1 { 
  font-size: 3.4rem; 
  line-height: 1.12; 
  margin-bottom: 26px;
  font-weight: 800;
  letter-spacing: -2px;
  color: var(--text);
}

.hero p { 
  font-size: 1.08rem; 
  opacity: 0.72; 
  max-width: 560px; 
  margin-bottom: 38px;
  line-height: 1.85;
}

.hero-buttons { display: flex; gap: 16px; }

.hero-image { 
  position: relative;
  border-radius: 24px; 
  overflow: hidden;
  box-shadow: 0 24px 60px rgba(228,87,46,0.15), 0 4px 12px rgba(42,39,37,0.06);
}
.hero-image img { 
  width: 100%; 
  height: auto; 
  display: block; 
}

/* ========== 按钮 ========== */
.btn { 
  display: inline-flex; 
  align-items: center; 
  gap: 8px; 
  padding: 14px 32px; 
  border-radius: 50px; 
  font-weight: 600; 
  font-size: 0.95rem;
  cursor: pointer; 
  border: none; 
  text-decoration: none; 
  transition: all 0.3s ease; 
  letter-spacing: 0.02em;
}

.btn-primary { 
  color: #fff; 
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  box-shadow: 0 6px 20px rgba(228,87,46,0.28);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(228,87,46,0.35);
}

.btn-outline { 
  background: transparent; 
  border: 1.5px solid var(--secondary);
  color: var(--secondary);
}
.btn-outline:hover {
  background: var(--secondary);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(29,78,137,0.2);
}

/* ========== 标签 / 标题 ========== */
.section-label { 
  display: inline-block; 
  font-size: 0.75rem; 
  font-weight: 800; 
  letter-spacing: 3px; 
  margin-bottom: 14px;
  text-transform: uppercase;
  color: var(--primary);
  padding: 4px 0;
  border-bottom: 2px solid var(--tertiary);
}

.section-title { 
  font-size: 2.4rem; 
  margin-bottom: 20px;
  font-weight: 800;
  letter-spacing: -1.5px;
  line-height: 1.2;
  color: var(--text);
}

.section-desc { 
  max-width: 620px; 
  opacity: 0.68; 
  margin-bottom: 48px;
  line-height: 1.8;
}

/* ========== 卡片网格 ========== */
.cards-grid { 
  display: grid; 
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); 
  gap: 28px; 
}

.category-card { 
  background: var(--white);
  border-radius: 18px;
  padding: 34px 30px;
  border: 1px solid rgba(42,39,37,0.04);
  box-shadow: var(--shadow-sm);
  transition: all 0.35s ease;
  position: relative;
  overflow: hidden;
}

.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--primary) 0%, var(--tertiary) 60%, transparent 100%);
  opacity: 0;
  transition: opacity 0.35s ease;
}

.category-card::after {
  content: '';
  position: absolute;
  right: -30px;
  top: -30px;
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: rgba(228,87,46,0.03);
  transition: transform 0.4s ease;
}

.category-card:hover { 
  transform: translateY(-6px); 
  box-shadow: var(--shadow-lg); 
  border-color: rgba(228,87,46,0.1);
}
.category-card:hover::before { opacity: 1; }
.category-card:hover::after { transform: scale(1.6); }

.card-icon { 
  width: 54px; 
  height: 54px; 
  border-radius: 14px; 
  background: rgba(228,87,46,0.08);
  display: flex; 
  align-items: center; 
  justify-content: center; 
  margin-bottom: 20px; 
  font-size: 1.4rem;
  color: var(--primary);
  transition: all 0.3s ease;
}
.category-card:hover .card-icon { 
  background: var(--primary); 
  color: #fff;
  box-shadow: 0 6px 16px rgba(228,87,46,0.3);
}

.card-link { 
  font-weight: 600; 
  font-size: 0.85rem; 
  text-decoration: none;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 5px;
  transition: gap 0.25s ease;
  margin-top: 8px;
}
.card-link:hover { gap: 10px; }

/* ========== 特性块 ========== */
.feature-block { 
  display: grid; 
  grid-template-columns: 1fr 1fr; 
  gap: 68px; 
  align-items: center; 
}

.feature-image { 
  border-radius: 22px; 
  overflow: hidden; 
  background: var(--white);
  box-shadow: var(--shadow-md);
  border: 1px solid rgba(42,39,37,0.04);
  position: relative;
}
.feature-image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(42,39,37,0.02) 0%, transparent 40%);
}
.feature-image img { 
  width: 100%; 
  height: auto; 
  display: block; 
  transition: transform 0.5s ease;
}
.feature-image:hover img { transform: scale(1.02); }

.feature-text { }
.feature-text .section-label { margin-bottom: 16px; }

.feature-list { list-style: none; margin-top: 24px; }
.feature-list li { 
  padding: 12px 0; 
  display: flex; 
  align-items: center; 
  gap: 14px;
  font-size: 0.94rem;
  border-bottom: 1px dashed rgba(42,39,37,0.07);
  transition: padding-left 0.25s ease;
}
.feature-list li:last-child { border-bottom: none; }
.feature-list li:hover { padding-left: 6px; }

.feature-list li::before { 
  content: '✓'; 
  font-weight: 700;
  color: var(--primary);
  background: rgba(228,87,46,0.08);
  width: 26px;
  height: 26px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  flex-shrink: 0;
}

/* ========== 数据条 ========== */
.stats-bar { 
  display: grid; 
  grid-template-columns: repeat(4, 1fr); 
  gap: 28px; 
  text-align: center; 
}

.stat-item { 
  padding: 36px 24px 32px; 
  border-radius: 20px; 
  border: 1px solid rgba(42,39,37,0.04);
  background: var(--white);
  box-shadow: var(--shadow-sm);
  transition: all 0.35s ease;
  position: relative;
  overflow: hidden;
}
.stat-item::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--tertiary));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}
.stat-item:hover { 
  transform: translateY(-4px); 
  box-shadow: var(--shadow-md); 
}
.stat-item:hover::before { transform: scaleX(1); }

.stat-number { 
  font-size: 2.8rem; 
  font-weight: 800;
  color: var(--primary);
  letter-spacing: -1.5px;
  line-height: 1.15;
}

.stat-label { 
  font-size: 0.88rem; 
  opacity: 0.58; 
  margin-top: 10px;
  letter-spacing: 0.5px;
}

/* ========== 内容墙 ========== */
.content-wall { 
  display: grid; 
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); 
  gap: 28px; 
}

.content-wall-item { 
  border-radius: 18px; 
  overflow: hidden; 
  border: 1px solid rgba(42,39,37,0.04);
  background: var(--white);
  box-shadow: var(--shadow-sm);
  transition: all 0.35s ease;
}

.content-wall-item:hover { 
  transform: translateY(-5px); 
  box-shadow: var(--shadow-lg); 
  border-color: rgba(228,87,46,0.1);
}

.content-wall-item img { 
  width: 100%; 
  height: 210px; 
  object-fit: cover; 
  display: block;
  transition: transform 0.5s ease;
}
.content-wall-item:hover img { transform: scale(1.04); }

.content-wall-body { 
  padding: 24px 24px 26px; 
}
.content-wall-body h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
}
.content-wall-body p {
  font-size: 0.85rem;
  opacity: 0.6;
  line-height: 1.6;
}

/* ========== FAQ ========== */
.faq-list { max-width: 820px; margin: 0 auto; }

.faq-item { 
  border: 1px solid rgba(42,39,37,0.05) !important; 
  border-radius: 16px !important; 
  margin-bottom: 12px; 
  overflow: hidden; 
  cursor: pointer;
  background: var(--white);
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
}
.faq-item:hover { 
  border-color: rgba(228,87,46,0.18) !important;
  box-shadow: var(--shadow-md);
}
.faq-item.open { 
  border-color: rgba(228,87,46,0.28) !important; 
  box-shadow: 0 8px 24px rgba(228,87,46,0.08);
}

.faq-item .faq-question { 
  padding: 22px 28px; 
  font-weight: 600; 
  display: flex; 
  justify-content: space-between;
  align-items: center;
  font-size: 0.98rem;
  gap: 16px;
}

.faq-item .faq-question::after {
  content: '+';
  font-size: 1.4rem;
  font-weight: 300;
  color: var(--primary);
  transition: transform 0.35s ease;
  flex-shrink: 0;
  line-height: 1;
}
.faq-item.open .faq-question::after { transform: rotate(45deg); }

.faq-item .faq-answer { 
  padding: 0 28px 24px; 
  display: none; 
  opacity: 0.7;
  line-height: 1.8;
  font-size: 0.93rem;
}
.faq-item.open .faq-answer { display: block; }

/* ========== CTA横幅 ========== */
.cta-banner { 
  padding: 72px 48px; 
  text-align: center; 
  border-radius: 24px; 
  background: linear-gradient(135deg, var(--primary) 0%, #F06040 50%, var(--tertiary) 120%);
  box-shadow: 0 20px 50px rgba(228,87,46,0.25);
  position: relative;
  overflow: hidden;
}

.cta-banner::before {
  content: '';
  position: absolute;
  top: -60px;
  right: -60px;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: rgba(255,255,255,0.08);
  pointer-events: none;
}

.cta-banner::after {
  content: '';
  position: absolute;
  bottom: -80px;
  left: -40px;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  background: rgba(255,255,255,0.05);
  pointer-events: none;
}

.cta-banner h2 { 
  color: #fff;
  font-size: 2.1rem;
  font-weight: 800;
  letter-spacing: -1px;
  margin-bottom: 14px;
  position: relative;
  z-index: 1;
}
.cta-banner p { 
  color: rgba(255,255,255,0.92); 
  font-size: 1.05rem;
  margin-bottom: 32px; 
  position: relative; 
  z-index: 1;
}
.cta-banner .btn-primary { 
  background: #fff;
  color: var(--primary);
  box-shadow: 0 8px 24px rgba(0,0,0,0.12);
  position: relative;
  z-index: 1;
}
.cta-banner .btn-primary:hover { 
  transform: translateY(-2px); 
  box-shadow: 0 12px 30px rgba(0,0,0,0.16); 
}

/* ========== 页脚 ========== */
.site-footer { 
  padding: 68px 0 36px; 
  background: #F0E9DC;
  border-top: 1px solid rgba(42,39,37,0.04);
}
.site-footer .container { }

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

.footer-brand { 
  font-weight: 800;
  font-size: 1.3rem;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.footer-brand .logo-icon {
  background: var(--secondary);
  box-shadow: 0 4px 14px rgba(29,78,137,0.25);
  margin-bottom: 16px;
}

.footer-brand p {
  font-size: 0.87rem;
  opacity: 0.58;
  line-height: 1.8;
  margin-top: 12px;
  max-width: 240px;
  font-weight: 400;
}

.footer-col { }

.footer-col h4 {
  font-size: 0.88rem;
  font-weight: 700;
  margin-bottom: 18px;
  color: var(--text);
  letter-spacing: 0.5px;
  position: relative;
  padding-bottom: 8px;
}
.footer-col h4::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 22px;
  height: 2px;
  background: var(--tertiary);
  border-radius: 2px;
}

.footer-col a {
  display: block;
  font-size: 0.87rem;
  opacity: 0.6;
  text-decoration: none;
  color: var(--text);
  padding: 6px 0;
  transition: all 0.2s ease;
}
.footer-col a:hover { 
  opacity: 1; 
  color: var(--primary);
  padding-left: 4px;
}

.footer-bottom { 
  border-top: 1px solid rgba(42,39,37,0.08); 
  margin-top: 52px; 
  padding-top: 24px; 
  text-align: center; 
  font-size: 0.82rem;
  opacity: 0.55;
}

/* ========== 工具类 ========== */
.text-accent { color: var(--primary); }
.text-center { text-align: center; }
.seo-description { 
  max-width: 600px; 
  margin: 0 auto 48px; 
  opacity: 0.65; 
  line-height: 1.8;
}
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }

/* ========== 响应式 ========== */
@media (max-width: 768px) {
  .feature-block { grid-template-columns: 1fr; gap: 44px; }
  .stats-bar { grid-template-columns: repeat(2, 1fr); gap: 20px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 36px; }

  .main-nav { display: none; }
  .menu-toggle { display: flex; align-items: center; justify-content: center; }

  .main-nav.open { 
    display: flex; 
    flex-direction: column; 
    position: absolute; 
    top: 74px; 
    left: 0; 
    width: 100%; 
    background: rgba(253,248,240,0.98);
    backdrop-filter: blur(24px);
    padding: 32px 24px;
    border-bottom: 1px solid rgba(42,39,37,0.06);
    gap: 22px;
    align-items: flex-start;
    box-shadow: 0 20px 40px rgba(42,39,37,0.06);
  }

  .main-nav.open a { font-size: 1rem; }
  .main-nav.open .nav-cta { align-self: flex-start; }

  .hero { padding-top: 130px; }
  .hero h1 { font-size: 2.4rem; }
  .hero p { font-size: 1rem; }
  .hero-buttons { flex-wrap: wrap; }
  .hero::after { display: none; }

  .cta-banner { padding: 56px 28px; }
  .cta-banner h2 { font-size: 1.7rem; }
  .cta-banner p { font-size: 0.95rem; }
}

@media (max-width: 480px) {
  .cards-grid,
  .content-wall,
  .stats-bar { grid-template-columns: 1fr; }

  .footer-grid { grid-template-columns: 1fr; gap: 32px; }

  .hero-buttons { flex-direction: column; align-items: stretch; }
  .btn { justify-content: center; }

  .section { padding: 64px 0; }
  .section-title { font-size: 1.9rem; }
  .hero h1 { font-size: 2rem; letter-spacing: -1px; }
  .hero { min-height: auto; padding-bottom: 48px; }

  .stat-number { font-size: 2.4rem; }
  .cta-banner { padding: 48px 24px; border-radius: 18px; }
  .cta-banner h2 { font-size: 1.4rem; }
}