/* =====================================================
   电影工厂 · 电影工厂在线观看免费
   Design System: "CINEMA PRAIRIE"
   奶油基底 × 朱砂红 × 松石绿 · 胶片美学
   ===================================================== */

:root {
  --c-cream: #F7F3EB;
  --c-cream-deep: #EFE8DC;
  --c-card: #FFFDF8;
  --c-vermilion: #E8482E;
  --c-coral: #FF6B4A;
  --c-teal: #147D6E;
  --c-teal-light: #1B9A88;
  --c-gold: #E9A820;
  --c-ink: #2A2A28;
  --c-body: #4A4A45;
  --c-white: #FFFFFF;
  --border-soft: rgba(42, 42, 40, 0.08);
  --shadow-sm: 0 2px 8px rgba(42, 42, 40, 0.06);
  --shadow-md: 0 8px 24px rgba(42, 42, 40, 0.08);
  --shadow-lg: 0 20px 48px rgba(232, 72, 46, 0.14);
  --r-sm: 8px;
  --r-md: 16px;
  --r-lg: 24px;
}

*, *::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: var(--c-cream);
  color: var(--c-body);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body::before {
  content: '';
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  pointer-events: none;
  z-index: -1;
  background-image: radial-gradient(rgba(42, 42, 40, 0.025) 1px, transparent 1px);
  background-size: 24px 24px;
}

::selection {
  background: var(--c-vermilion);
  color: #fff;
}

::-webkit-scrollbar {
  width: 10px;
}
::-webkit-scrollbar-track {
  background: var(--c-cream);
}
::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--c-vermilion), var(--c-teal));
  border-radius: 5px;
}

:focus-visible {
  outline: 3px solid rgba(232, 72, 46, 0.4);
  outline-offset: 2px;
  border-radius: 4px;
}

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

.section {
  padding: 100px 0;
  position: relative;
}

.section:nth-child(even) {
  background: var(--c-cream-deep);
}

.section:nth-child(even)::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 24px;
  background: repeating-linear-gradient(
    90deg,
    transparent 0 28px,
    rgba(232, 72, 46, 0.1) 28px 36px,
    transparent 36px 64px,
    rgba(20, 125, 110, 0.1) 64px 72px,
    transparent 72px 100px
  );
  pointer-events: none;
}

/* =====================================================
   导航
   ===================================================== */
.site-header {
  position: fixed;
  top: 0; left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(247, 243, 235, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-soft);
  transition: box-shadow 0.3s;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.25rem;
  text-decoration: none;
  color: var(--c-ink);
  letter-spacing: -0.02em;
}

.logo-icon {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  background: linear-gradient(135deg, var(--c-vermilion), var(--c-coral));
  color: #fff;
  box-shadow: 0 4px 16px rgba(232, 72, 46, 0.3);
  position: relative;
}

.logo-icon::after {
  content: '';
  position: absolute;
  bottom: 3px; left: 6px;
  width: 26px;
  height: 2px;
  background: repeating-linear-gradient(90deg, #fff 0 4px, transparent 4px 8px);
  border-radius: 1px;
  opacity: 0.8;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.main-nav a {
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.25s;
  color: var(--c-ink);
  position: relative;
  padding: 4px 0;
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: -2px; left: 0;
  width: 0;
  height: 2px;
  background: var(--c-vermilion);
  border-radius: 2px;
  transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.main-nav a:hover {
  color: var(--c-vermilion);
}

.main-nav a:hover::after {
  width: 100%;
}

.nav-cta {
  padding: 10px 24px;
  border-radius: 999px;
  color: #fff !important;
  font-weight: 600;
  background: linear-gradient(135deg, var(--c-vermilion), var(--c-coral));
  box-shadow: 0 4px 16px rgba(232, 72, 46, 0.25);
  transition: transform 0.25s, box-shadow 0.25s !important;
}

.nav-cta::after {
  display: none;
}

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(232, 72, 46, 0.35);
  color: #fff !important;
}

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  border: 1px solid var(--border-soft);
  background: var(--c-card);
  color: var(--c-ink);
  font-size: 1.3rem;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  transition: all 0.25s;
}

.menu-toggle:hover {
  border-color: var(--c-vermilion);
  color: var(--c-vermilion);
}

.menu-toggle.open {
  background: var(--c-vermilion);
  color: #fff;
  border-color: var(--c-vermilion);
}

/* =====================================================
   Hero
   ===================================================== */
.hero {
  min-height: 80vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding: 140px 0 100px;
  background:
    radial-gradient(circle at 85% 20%, rgba(233, 168, 32, 0.07), transparent 40%),
    radial-gradient(circle at 10% 80%, rgba(20, 125, 110, 0.07), transparent 40%),
    var(--c-cream);
}

.hero::before {
  content: '🎬';
  position: absolute;
  right: -40px;
  top: 60px;
  font-size: 26rem;
  line-height: 1;
  opacity: 0.045;
  transform: rotate(-12deg);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 32px;
  background: repeating-linear-gradient(
    90deg,
    transparent 0 36px,
    rgba(232, 72, 46, 0.1) 36px 44px,
    transparent 44px 80px,
    rgba(20, 125, 110, 0.1) 80px 88px,
    transparent 88px 124px
  );
  opacity: 0.6;
  pointer-events: none;
}

.hero-content {
  max-width: 760px;
  position: relative;
  z-index: 1;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 8px 20px;
  border-radius: 999px;
  margin-bottom: 24px;
  background: rgba(20, 125, 110, 0.1);
  color: var(--c-teal);
  text-transform: uppercase;
  letter-spacing: 2px;
}

.hero-eyebrow::before {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--c-vermilion);
  box-shadow: 0 0 0 3px rgba(232, 72, 46, 0.2);
  animation: pulse-disc 2s ease-in-out infinite;
}

@keyframes pulse-disc {
  0%, 100% { box-shadow: 0 0 0 3px rgba(232, 72, 46, 0.2); }
  50% { box-shadow: 0 0 0 7px rgba(232, 72, 46, 0.08); }
}

.hero h1 {
  font-size: clamp(2.8rem, 6vw, 4.6rem);
  line-height: 1.08;
  margin-bottom: 24px;
  color: var(--c-ink);
  font-weight: 800;
  letter-spacing: -0.03em;
}

.hero h1 .text-accent {
  color: var(--c-vermilion);
  position: relative;
  display: inline-block;
}

.hero p {
  font-size: 1.1rem;
  opacity: 0.7;
  max-width: 560px;
  margin-bottom: 36px;
  color: var(--c-body);
  line-height: 1.8;
}

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

.hero-image {
  border-radius: var(--r-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 4px solid var(--c-white);
  background: linear-gradient(135deg, rgba(232, 72, 46, 0.1), rgba(20, 125, 110, 0.12));
  position: relative;
}

.hero-image img {
  width: 100%;
  height: auto;
  display: block;
}

.hero-content > * {
  animation: fade-up 0.8s cubic-bezier(0.4, 0, 0.2, 1) both;
}
.hero-content > *:nth-child(1) { animation-delay: 0.08s; }
.hero-content > *:nth-child(2) { animation-delay: 0.16s; }
.hero-content > *:nth-child(3) { animation-delay: 0.24s; }
.hero-content > *:nth-child(4) { animation-delay: 0.32s; }
.hero-content > *:nth-child(5) { animation-delay: 0.4s; }

@keyframes fade-up {
  from { opacity: 0; transform: translateY(28px); }
  to { opacity: 1; transform: translateY(0); }
}

/* =====================================================
   按钮
   ===================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--c-vermilion) 0%, var(--c-coral) 100%);
  box-shadow: 0 6px 20px rgba(232, 72, 46, 0.28);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(232, 72, 46, 0.36);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 4px 12px rgba(232, 72, 46, 0.2);
}

.btn-outline {
  background: transparent;
  border: 1.5px solid var(--c-ink);
  color: var(--c-ink);
}

.btn-outline:hover {
  background: var(--c-ink);
  color: var(--c-cream);
  transform: translateY(-2px);
}

/* =====================================================
   标签 / 标题
   ===================================================== */
.section-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 2px;
  margin-bottom: 14px;
  color: var(--c-teal);
  text-transform: uppercase;
  background: rgba(20, 125, 110, 0.08);
  padding: 6px 18px;
  border-radius: 999px;
}

.section-label::before {
  content: '';
  width: 18px;
  height: 2px;
  background: var(--c-vermilion);
  border-radius: 2px;
}

.section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: 14px;
  color: var(--c-ink);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.15;
}

.section-desc {
  max-width: 600px;
  opacity: 0.7;
  margin-bottom: 48px;
  color: var(--c-body);
  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 {
  border-radius: var(--r-md);
  padding: 32px 28px;
  border: 1px solid var(--border-soft);
  background: var(--c-card);
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.category-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--c-vermilion), var(--c-gold));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.45s cubic-bezier(0.4, 0, 0.2, 1);
}

.category-card::after {
  content: '';
  position: absolute;
  bottom: -32px; right: -32px;
  width: 90px; height: 90px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(20, 125, 110, 0.08), transparent 70%);
  transition: transform 0.4s;
}

.category-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: rgba(232, 72, 46, 0.18);
}

.category-card:hover::before {
  transform: scaleX(1);
}

.category-card:hover::after {
  transform: scale(1.5);
}

.card-icon {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  font-size: 1.4rem;
  background: linear-gradient(135deg, rgba(232, 72, 46, 0.08), rgba(20, 125, 110, 0.08));
  color: var(--c-vermilion);
  transition: all 0.3s;
}

.category-card:hover .card-icon {
  background: linear-gradient(135deg, var(--c-vermilion), var(--c-coral));
  color: #fff;
  transform: scale(1.05) rotate(-5deg);
  box-shadow: 0 8px 20px rgba(232, 72, 46, 0.25);
}

.category-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--c-ink);
  margin-bottom: 8px;
}

.category-card p {
  font-size: 0.9rem;
  opacity: 0.65;
  line-height: 1.6;
  margin-bottom: 16px;
}

.card-link {
  font-weight: 600;
  font-size: 0.85rem;
  text-decoration: none;
  color: var(--c-teal);
  transition: color 0.25s, gap 0.25s;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.card-link:hover {
  color: var(--c-vermilion);
  gap: 8px;
}

/* =====================================================
   特性块
   ===================================================== */
.feature-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.feature-image {
  border-radius: var(--r-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  position: relative;
  background: linear-gradient(135deg, rgba(20, 125, 110, 0.1), rgba(232, 72, 46, 0.08));
}

.feature-image::before {
  content: '';
  position: absolute;
  top: 14px; left: 14px;
  width: 40px; height: 40px;
  background: repeating-linear-gradient(
    90deg,
    rgba(255, 255, 255, 0.7) 0 4px,
    transparent 4px 10px
  );
  border-radius: 6px;
  z-index: 1;
  opacity: 0.6;
}

.feature-image img {
  width: 100%;
  height: auto;
  display: block;
}

.feature-text h3 {
  font-size: 1.7rem;
  font-weight: 800;
  color: var(--c-ink);
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.feature-text p {
  font-size: 1rem;
  opacity: 0.72;
  line-height: 1.8;
  margin-bottom: 24px;
}

.feature-text .btn {
  margin-top: 8px;
}

.feature-list {
  list-style: none;
  margin-top: 8px;
}

.feature-list li {
  padding: 8px 0;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.95rem;
  color: var(--c-body);
}

.feature-list li::before {
  content: '✓';
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: rgba(20, 125, 110, 0.12);
  color: var(--c-teal);
  font-size: 0.75rem;
  flex-shrink: 0;
}

/* =====================================================
   数据条
   ===================================================== */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}

.stat-item {
  padding: 32px 24px;
  border-radius: var(--r-md);
  border: 1px solid var(--border-soft);
  background: var(--c-card);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.stat-item::before {
  content: '';
  position: absolute;
  bottom: 0; left: 50%;
  transform: translateX(-50%);
  width: 40px; height: 3px;
  background: linear-gradient(90deg, var(--c-vermilion), var(--c-gold));
  border-radius: 2px;
  opacity: 0;
  transition: opacity 0.3s, width 0.3s;
}

.stat-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.stat-item:hover::before {
  opacity: 1;
  width: 60px;
}

.stat-number {
  font-size: 2.6rem;
  font-weight: 800;
  color: var(--c-vermilion);
  line-height: 1.1;
  letter-spacing: -0.03em;
}

.stat-label {
  font-size: 0.9rem;
  opacity: 0.6;
  margin-top: 8px;
  color: var(--c-body);
}

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

.content-wall-item {
  border-radius: var(--r-md);
  overflow: hidden;
  border: 1px solid var(--border-soft);
  background: var(--c-card);
  transition: all 0.45s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
}

.content-wall-item::after {
  content: '▶';
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%) scale(0.6);
  width: 52px; height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(232, 72, 46, 0.92);
  color: #fff;
  border-radius: 50%;
  font-size: 1rem;
  opacity: 0;
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 8px 32px rgba(232, 72, 46, 0.4);
  z-index: 2;
}

.content-wall-item:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(232, 72, 46, 0.15);
}

.content-wall-item:hover::after {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
}

.content-wall-item img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.content-wall-item:hover img {
  transform: scale(1.04);
}

.content-wall-body {
  padding: 22px;
  position: relative;
  z-index: 1;
}

.content-wall-body h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--c-ink);
  margin-bottom: 6px;
}

.content-wall-body p {
  font-size: 0.85rem;
  opacity: 0.6;
  line-height: 1.55;
}

.content-wall-body .tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 3px 12px;
  border-radius: 999px;
  background: rgba(232, 72, 46, 0.08);
  color: var(--c-vermilion);
  margin-bottom: 10px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* =====================================================
   FAQ
   ===================================================== */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  border: 1px solid var(--border-soft);
  border-radius: var(--r-md);
  margin-bottom: 12px;
  overflow: hidden;
  cursor: pointer;
  background: var(--c-card);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.faq-item:hover {
  border-color: rgba(232, 72, 46, 0.25);
  box-shadow: var(--shadow-sm);
}

.faq-item.open {
  border-color: rgba(232, 72, 46, 0.3);
  box-shadow: var(--shadow-md);
}

.faq-item .faq-question {
  padding: 18px 24px;
  font-weight: 600;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--c-ink);
  position: relative;
  font-size: 1rem;
}

.faq-item .faq-question::after {
  content: '+';
  font-size: 1.5rem;
  font-weight: 300;
  color: var(--c-vermilion);
  transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  line-height: 1;
}

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

.faq-item .faq-answer {
  padding: 0 24px 20px;
  display: none;
  opacity: 0.75;
  color: var(--c-body);
  line-height: 1.75;
  font-size: 0.95rem;
  border-top: 1px dashed var(--border-soft);
  padding-top: 14px;
}

.faq-item.open .faq-answer {
  display: block;
  animation: reveal 0.35s ease-out;
}

@keyframes reveal {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* =====================================================
   CTA 横幅
   ===================================================== */
.cta-banner {
  padding: 64px 40px;
  text-align: center;
  border-radius: var(--r-lg);
  color: var(--c-white);
  background: linear-gradient(135deg, var(--c-vermilion) 0%, var(--c-coral) 55%, var(--c-gold) 130%);
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
}

.cta-banner::before {
  content: '';
  position: absolute;
  top: -60%;
  left: -20%;
  width: 70%;
  height: 220%;
  background: repeating-linear-gradient(
    45deg,
    transparent 0 22px,
    rgba(255, 255, 255, 0.06) 22px 30px,
    transparent 30px 52px
  );
  pointer-events: none;
}

.cta-banner::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 16px;
  background: repeating-linear-gradient(
    90deg,
    transparent 0 24px,
    rgba(255, 255, 255, 0.18) 24px 30px,
    transparent 30px 54px
  );
  opacity: 0.5;
}

.cta-banner h2 {
  color: var(--c-white);
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 14px;
  position: relative;
  z-index: 1;
}

.cta-banner p {
  opacity: 0.9;
  max-width: 520px;
  margin: 0 auto 28px;
  position: relative;
  z-index: 1;
  line-height: 1.7;
}

.cta-banner .btn-primary {
  background: var(--c-white);
  color: var(--c-vermilion);
  box-shadow: 0 8px 24px rgba(42, 42, 40, 0.18);
  position: relative;
  z-index: 1;
}

.cta-banner .btn-primary:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 16px 40px rgba(42, 42, 40, 0.25);
}

/* =====================================================
   页脚
   ===================================================== */
.site-footer {
  padding: 64px 0 28px;
  background: var(--c-cream);
  border-top: 2px solid var(--border-soft);
  position: relative;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: -2px;
  left: 50%;
  transform: translateX(-50%);
  width: 240px;
  height: 4px;
  background: repeating-linear-gradient(
    90deg,
    var(--c-vermilion) 0 12px,
    transparent 12px 24px,
    var(--c-teal) 24px 36px,
    transparent 36px 48px,
    var(--c-gold) 48px 60px,
    transparent 60px 72px
  );
  border-radius: 2px;
}

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

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

.footer-brand p {
  font-size: 0.9rem;
  opacity: 0.6;
  line-height: 1.7;
  max-width: 280px;
}

.footer-col h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--c-ink);
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.footer-col a {
  display: block;
  font-size: 0.9rem;
  color: var(--c-body);
  text-decoration: none;
  padding: 5px 0;
  opacity: 0.7;
  transition: all 0.25s;
}

.footer-col a:hover {
  color: var(--c-vermilion);
  opacity: 1;
  transform: translateX(4px);
}

.footer-bottom {
  border-top: 1px solid var(--border-soft);
  margin-top: 48px;
  padding-top: 20px;
  text-align: center;
  font-size: 0.85rem;
  color: rgba(42, 42, 40, 0.5);
}

/* =====================================================
   工具类
   ===================================================== */
.text-accent {
  color: var(--c-vermilion);
}

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

.seo-description {
  max-width: 600px;
  margin: 0 auto 48px;
  opacity: 0.7;
  color: var(--c-body);
  line-height: 1.8;
  text-align: center;
}

.mt-0 { margin-top: 0 !important; }
.mb-0 { margin-bottom: 0 !important; }

/* =====================================================
   响应式
   ===================================================== */
@media (max-width: 1024px) {
  .section { padding: 80px 0; }
  .hero h1 { font-size: 3.2rem; }
  .feature-block { grid-template-columns: 1fr; gap: 40px; }
  .stats-bar { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .hero::before { font-size: 20rem; }
}

@media (max-width: 768px) {
  .feature-block { grid-template-columns: 1fr; }
  .stats-bar { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .main-nav {
    display: none;
  }
  .menu-toggle {
    display: flex;
  }
  .main-nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 68px;
    left: 0;
    width: 100%;
    background: var(--c-card);
    padding: 24px;
    border-bottom: 1px solid var(--border-soft);
    box-shadow: var(--shadow-md);
    gap: 4px;
  }
  .main-nav.open a {
    padding: 12px 8px;
    font-size: 1rem;
    border-bottom: 1px solid var(--border-soft);
  }
  .main-nav.open a::after { display: none; }
  .main-nav.open .nav-cta {
    margin-top: 12px;
    text-align: center;
    border-bottom: none;
  }
  .hero { min-height: 70vh; padding: 120px 0 80px; }
  .hero h1 { font-size: clamp(2.2rem, 8vw, 3rem); }
  .hero::before { font-size: 14rem; right: -20px; }
  .hero::after { height: 20px; }
  .cta-banner { padding: 48px 24px; }
  .section { padding: 70px 0; }
}

@media (max-width: 480px) {
  .cards-grid,
  .content-wall,
  .stats-bar {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .hero-buttons {
    flex-direction: column;
  }
  .hero-buttons .btn {
    width: 100%;
    justify-content: center;
  }
  .header-inner {
    height: 60px;
    padding: 0 16px;
  }
  .hero {
    padding: 100px 0 60px;
    min-height: 60vh;
  }
  .hero p { font-size: 1rem; }
  .section { padding: 56px 0; }
  .cta-banner { padding: 40px 20px; border-radius: var(--r-md); }
  .stat-item { padding: 24px 20px; }
  .stat-number { font-size: 2rem; }
  .footer-bottom {
    margin-top: 32px;
    font-size: 0.78rem;
  }
}