/* ============================================
   ACFUN网页版入口 · 弹幕星球设计系统
   一页入弹幕星球 — acfan.hb.cn
   视觉风格：弹幕漂浮 · 暖色渐变 · 活力星球
   ============================================ */

*, *::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: #FEFAF5;
  background-image:
    radial-gradient(rgba(255, 90, 95, 0.06) 1px, transparent 1px),
    radial-gradient(rgba(255, 209, 102, 0.08) 1px, transparent 1px);
  background-size: 32px 32px, 48px 48px;
  background-position: 0 0, 16px 16px;
  color: #2D2D2D;
}

/* ============================================
   核心布局
   ============================================ */

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 80px 0;
  position: relative;
}

.section:nth-child(even) {
  background: linear-gradient(180deg, #FFF6EE 0%, #FEFAF5 100%);
}

/* ============================================
   导航 — 固定顶部
   ============================================ */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(254, 250, 245, 0.85);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  border-bottom: 1px solid rgba(255, 90, 95, 0.08);
  box-shadow: 0 4px 30px rgba(255, 90, 95, 0.04);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 900;
  font-size: 1.35rem;
  text-decoration: none;
  color: #2D2D2D;
  letter-spacing: -0.5px;
}

.logo-icon {
  width: 40px;
  height: 40px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  background: linear-gradient(135deg, #FF5A5F 0%, #FFD166 100%);
  color: #fff;
  box-shadow: 0 4px 16px rgba(255, 90, 95, 0.3);
  transform: rotate(-6deg);
  transition: transform 0.3s;
}

.logo:hover .logo-icon {
  transform: rotate(6deg) scale(1.05);
}

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

.main-nav a {
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  color: #4A4A4A;
  position: relative;
  padding: 4px 0;
  transition: color 0.3s;
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 2.5px;
  background: linear-gradient(90deg, #FF5A5F, #FFD166);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.35s cubic-bezier(0.23, 1, 0.32, 1);
  border-radius: 2px;
}

.main-nav a:hover {
  color: #FF5A5F;
}

.main-nav a:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

.nav-cta {
  padding: 10px 28px;
  border-radius: 999px;
  color: #fff !important;
  font-weight: 700;
  background: linear-gradient(130deg, #FF5A5F 0%, #FF8E53 100%);
  box-shadow: 0 4px 20px rgba(255, 90, 95, 0.28);
  transition: all 0.3s !important;
}

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

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(255, 90, 95, 0.36);
  color: #fff !important;
}

.menu-toggle {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  background: transparent;
  border: none;
  cursor: pointer;
  border-radius: 12px;
}

.menu-toggle span {
  display: block;
  width: 22px;
  height: 2.5px;
  background: #2D2D2D;
  border-radius: 3px;
  transition: all 0.3s;
}

/* ============================================
   首页 Hero
   ============================================ */

.hero {
  min-height: 85vh;
  display: flex;
  align-items: center;
  position: relative;
  background:
    radial-gradient(ellipse 600px 400px at 85% 20%, rgba(255, 209, 102, 0.14), transparent 70%),
    radial-gradient(ellipse 400px 300px at 10% 75%, rgba(255, 90, 95, 0.08), transparent 70%),
    linear-gradient(160deg, #FFF9F2 0%, #FEFAF5 60%, #FFF4E8 100%);
  overflow: hidden;
}

/* 弹幕装饰 — 漂浮 */
.hero::before {
  content: '前方高能 ⚡';
  position: absolute;
  top: 14%;
  left: 3%;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  padding: 8px 22px;
  border-radius: 999px;
  font-size: 0.88rem;
  font-weight: 800;
  color: #FF5A5F;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
  --r: -8deg;
  animation: danmakuFloat 4s ease-in-out infinite;
  z-index: 3;
  white-space: nowrap;
  letter-spacing: 1px;
}

.hero::after {
  content: '23333333 ✨';
  position: absolute;
  bottom: 18%;
  left: 38%;
  background: linear-gradient(130deg, #FF5A5F, #FF8E53);
  color: #fff;
  padding: 6px 20px;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 700;
  box-shadow: 0 6px 24px rgba(255, 90, 95, 0.3);
  --r: 10deg;
  animation: danmakuFloat 5s ease-in-out 1.2s infinite;
  z-index: 3;
  white-space: nowrap;
}

.hero-content {
  max-width: 680px;
  position: relative;
  z-index: 2;
  padding: 80px 0;
}

.hero-eyebrow {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 2px;
  padding: 6px 22px;
  border-radius: 999px;
  margin-bottom: 20px;
  background: linear-gradient(130deg, #FF5A5F 0%, #FF8E53 100%);
  color: #fff;
  box-shadow: 0 4px 18px rgba(255, 90, 95, 0.24);
  text-transform: uppercase;
}

.hero h1 {
  font-size: clamp(3rem, 6vw, 4.8rem);
  font-weight: 900;
  line-height: 1.04;
  letter-spacing: -2.5px;
  margin-bottom: 24px;
  color: #2D2D2D;
  text-shadow: 0 4px 30px rgba(255, 90, 95, 0.06);
}

.hero p {
  font-size: 1.12rem;
  line-height: 1.8;
  color: #6B6B6B;
  max-width: 540px;
  margin-bottom: 36px;
  font-weight: 400;
}

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

.hero-image {
  position: relative;
  border-radius: 28px;
  overflow: hidden;
  border: 6px solid rgba(255, 255, 255, 0.9);
  box-shadow:
    0 32px 80px rgba(255, 90, 95, 0.14),
    0 8px 24px rgba(0, 0, 0, 0.05);
  transform: rotate(2deg);
  transition: transform 0.4s;
  margin: 20px;
}

.hero-image:hover {
  transform: rotate(0deg) scale(1.01);
}

/* 弹幕屏幕装饰 */
.hero-image::before {
  content: '前方高能!!!';
  position: absolute;
  top: 18px;
  right: -16px;
  background: rgba(255, 255, 255, 0.86);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  padding: 5px 16px;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 800;
  color: #FF5A5F;
  transform: rotate(10deg);
  z-index: 2;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.05);
}

.hero-image::after {
  content: 'AWSL AWSL';
  position: absolute;
  bottom: 24px;
  left: -16px;
  background: rgba(45, 45, 45, 0.72);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  color: #fff;
  padding: 5px 14px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 700;
  transform: rotate(-6deg);
  z-index: 2;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
  letter-spacing: 1px;
}

.hero-image img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  border-radius: 22px;
  min-height: 340px;
}

/* ============================================
   按钮
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: all 0.35s cubic-bezier(0.23, 1, 0.32, 1);
  line-height: 1;
}

.btn-primary {
  background: linear-gradient(130deg, #FF5A5F 0%, #FF7E5F 50%, #FF8E53 100%);
  color: #fff;
  box-shadow: 0 8px 28px rgba(255, 90, 95, 0.25);
}

.btn-primary:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 14px 40px rgba(255, 90, 95, 0.32);
}

.btn-primary:active {
  transform: translateY(-1px) scale(0.98);
}

.btn-outline {
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 2px solid rgba(255, 90, 95, 0.35);
  color: #FF5A5F;
}

.btn-outline:hover {
  background: linear-gradient(130deg, #FF5A5F, #FF8E53);
  border-color: transparent;
  color: #fff;
  box-shadow: 0 8px 28px rgba(255, 90, 95, 0.25);
  transform: translateY(-3px);
}

/* ============================================
   标签 / 标题
   ============================================ */

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: #FF5A5F;
  background: rgba(255, 90, 95, 0.08);
  padding: 6px 18px;
  border-radius: 999px;
  margin-bottom: 18px;
}

.section-label::before {
  content: '●';
  font-size: 0.5rem;
  color: #FF5A5F;
}

.section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 900;
  letter-spacing: -1.5px;
  line-height: 1.15;
  margin-bottom: 16px;
  color: #2D2D2D;
}

.section-title::before {
  content: '◆ ';
  color: #FF5A5F;
  font-size: 0.5em;
  vertical-align: baseline;
}

.section-desc {
  max-width: 640px;
  color: #8A8A8A;
  font-size: 1.02rem;
  line-height: 1.75;
  margin-bottom: 48px;
  font-weight: 400;
}

/* ============================================
   卡片网格
   ============================================ */

.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 24px;
}

.category-card {
  background: #FFFFFF;
  border-radius: 24px;
  padding: 30px 28px;
  border: 1px solid rgba(0, 0, 0, 0.04);
  transition: all 0.4s cubic-bezier(0.23, 1, 0.32, 1);
  position: relative;
  overflow: hidden;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.025);
}

.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, #FF5A5F, #FFD166);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.45s cubic-bezier(0.23, 1, 0.32, 1);
}

.category-card::after {
  content: '';
  position: absolute;
  top: -40px;
  right: -40px;
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 209, 102, 0.15), transparent 70%);
  transition: transform 0.4s;
}

.category-card:nth-child(1) {
  transform: rotate(-1deg);
}

.category-card:nth-child(2) {
  transform: rotate(0.8deg);
}

.category-card:nth-child(3) {
  transform: rotate(-0.6deg);
}

.category-card:nth-child(4) {
  transform: rotate(1.2deg);
}

.category-card:hover {
  transform: translateY(-8px) rotate(0deg) scale(1.02);
  box-shadow:
    0 20px 44px rgba(255, 90, 95, 0.1),
    0 6px 16px rgba(0, 0, 0, 0.04);
  border-color: rgba(255, 90, 95, 0.12);
}

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

.category-card:hover::after {
  transform: scale(1.6);
}

.card-icon {
  width: 58px;
  height: 58px;
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 18px;
  transition: transform 0.35s;
  background: linear-gradient(135deg, rgba(255, 90, 95, 0.1), rgba(255, 209, 102, 0.12));
}

.category-card:nth-child(1) .card-icon {
  background: linear-gradient(135deg, rgba(255, 90, 95, 0.12), rgba(255, 90, 95, 0.03));
}

.category-card:nth-child(2) .card-icon {
  background: linear-gradient(135deg, rgba(255, 209, 102, 0.18), rgba(255, 209, 102, 0.04));
}

.category-card:nth-child(3) .card-icon {
  background: linear-gradient(135deg, rgba(6, 214, 160, 0.14), rgba(6, 214, 160, 0.03));
}

.category-card:nth-child(4) .card-icon {
  background: linear-gradient(135deg, rgba(123, 104, 238, 0.14), rgba(123, 104, 238, 0.03));
}

.category-card:hover .card-icon {
  transform: scale(1.1) rotate(-6deg);
}

.card-link {
  font-weight: 800;
  font-size: 0.88rem;
  text-decoration: none;
  color: #FF5A5F;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap 0.3s;
}

.card-link::after {
  content: '→';
  transition: transform 0.3s;
}

.card-link:hover {
  gap: 8px;
}

/* ============================================
   特性块
   ============================================ */

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

.feature-image {
  border-radius: 28px;
  overflow: hidden;
  box-shadow:
    0 24px 60px rgba(255, 90, 95, 0.12),
    0 6px 20px rgba(0, 0, 0, 0.04);
  transform: rotate(-2deg);
  border: 5px solid #fff;
  position: relative;
  transition: transform 0.4s;
}

.feature-image::after {
  content: '▶';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 60px;
  height: 60px;
  background: rgba(255, 255, 255, 0.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  color: #FF5A5F;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s;
}

.feature-image:hover {
  transform: rotate(0deg) scale(1.01);
}

.feature-image:hover::after {
  transform: translate(-50%, -50%) scale(1.1);
}

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

.feature-text {
  padding: 20px 0;
}

.feature-text h3 {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

.feature-list {
  list-style: none;
  margin-top: 24px;
}

.feature-list li {
  padding: 8px 0;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.98rem;
  color: #4A4A4A;
  font-weight: 500;
}

.feature-list li::before {
  content: '✦';
  font-weight: 900;
  color: #FF5A5F;
  font-size: 1.1rem;
}

/* ============================================
   数据条
   ============================================ */

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

.stat-item {
  padding: 32px 20px;
  border-radius: 28px;
  border: 1px solid rgba(0, 0, 0, 0.04);
  background: #fff;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
  transition: transform 0.35s, box-shadow 0.35s;
  position: relative;
  overflow: hidden;
}

.stat-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 40%;
  height: 4px;
  border-radius: 0 0 4px 4px;
  background: currentColor;
  opacity: 0.6;
}

.stat-item:hover {
  transform: translateY(-6px);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.06);
}

.stat-item:nth-child(1) {
  color: #FF5A5F;
}

.stat-item:nth-child(2) {
  color: #06D6A0;
}

.stat-item:nth-child(3) {
  color: #FFB800;
}

.stat-item:nth-child(4) {
  color: #7B68EE;
}

.stat-number {
  font-size: 2.8rem;
  font-weight: 900;
  letter-spacing: -2px;
  line-height: 1;
}

.stat-label {
  font-size: 0.88rem;
  color: #8A8A8A;
  margin-top: 8px;
  font-weight: 600;
  letter-spacing: 1px;
}

/* ============================================
   内容墙
   ============================================ */

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

.content-wall-item {
  border-radius: 24px;
  overflow: hidden;
  background: #fff;
  border: 1px solid rgba(0, 0, 0, 0.04);
  transition: all 0.4s cubic-bezier(0.23, 1, 0.32, 1);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.02);
}

.content-wall-item:hover {
  transform: translateY(-6px) rotate(0.4deg);
  box-shadow:
    0 20px 44px rgba(0, 0, 0, 0.07),
    0 4px 12px rgba(255, 90, 95, 0.05);
}

.content-wall-item img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  display: block;
  transition: transform 0.5s cubic-bezier(0.23, 1, 0.32, 1);
}

.content-wall-item:hover img {
  transform: scale(1.05);
}

.content-wall-body {
  padding: 22px 24px 26px;
}

.content-wall-body h4 {
  font-size: 1.05rem;
  font-weight: 800;
  margin-bottom: 6px;
  color: #2D2D2D;
}

.content-wall-body p {
  font-size: 0.85rem;
  color: #9A9A9A;
  line-height: 1.5;
  margin-bottom: 12px;
}

.content-wall-body .card-link {
  font-size: 0.8rem;
}

/* ============================================
   FAQ
   ============================================ */

.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  border: 1px solid rgba(0, 0, 0, 0.05);
  border-radius: 20px;
  margin-bottom: 10px;
  overflow: hidden;
  cursor: pointer;
  background: #fff;
  transition: all 0.35s;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.02);
}

.faq-item:hover {
  border-color: rgba(255, 90, 95, 0.15);
  box-shadow: 0 6px 20px rgba(255, 90, 95, 0.05);
}

.faq-item.open {
  border-color: rgba(255, 90, 95, 0.2);
  box-shadow: 0 8px 28px rgba(255, 90, 95, 0.08);
}

.faq-item .faq-question {
  padding: 20px 24px;
  font-weight: 700;
  font-size: 0.98rem;
  color: #2D2D2D;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  transition: color 0.3s;
}

.faq-item .faq-question::after {
  content: '+';
  font-size: 1.5rem;
  font-weight: 400;
  color: #FF5A5F;
  transition: transform 0.4s cubic-bezier(0.23, 1, 0.32, 1);
  line-height: 1;
  flex-shrink: 0;
}

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

.faq-item .faq-answer {
  padding: 0 24px 20px;
  display: none;
  opacity: 0;
  color: #7A7A7A;
  font-size: 0.92rem;
  line-height: 1.7;
  transition: opacity 0.3s;
}

.faq-item.open .faq-answer {
  display: block;
  opacity: 1;
}

/* ============================================
   CTA 横幅
   ============================================ */

.cta-banner {
  padding: 64px 40px;
  text-align: center;
  border-radius: 32px;
  background: linear-gradient(135deg, #FF5A5F 0%, #FF7E5F 50%, #FFB800 100%);
  color: #fff;
  position: relative;
  overflow: hidden;
  box-shadow: 0 24px 60px rgba(255, 90, 95, 0.25);
}

.cta-banner::before {
  content: '';
  position: absolute;
  top: -60px;
  right: -60px;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  animation: breathe 6s ease-in-out infinite;
}

.cta-banner::after {
  content: 'A';
  position: absolute;
  bottom: -80px;
  left: -20px;
  font-size: 18rem;
  font-weight: 900;
  color: rgba(255, 255, 255, 0.08);
  line-height: 1;
  pointer-events: none;
}

.cta-banner h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 900;
  letter-spacing: -1.5px;
  margin-bottom: 16px;
  color: #fff;
  position: relative;
  z-index: 1;
}

.cta-banner p {
  position: relative;
  z-index: 1;
  color: rgba(255, 255, 255, 0.85);
  max-width: 480px;
  margin: 0 auto 28px;
  font-size: 1rem;
  line-height: 1.7;
}

.cta-banner .btn-primary {
  background: #fff;
  color: #FF5A5F;
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.12);
  position: relative;
  z-index: 1;
}

.cta-banner .btn-primary:hover {
  transform: translateY(-3px) scale(1.03);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.15);
}

/* ============================================
   页脚
   ============================================ */

.site-footer {
  padding: 64px 0 28px;
  background: #F9F3EC;
  border-top: 1px solid rgba(255, 90, 95, 0.06);
  position: relative;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, rgba(255, 90, 95, 0.2), rgba(255, 209, 102, 0.3), transparent);
}

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

.footer-brand {
  max-width: 320px;
}

.footer-brand .logo {
  font-size: 1.2rem;
  margin-bottom: 14px;
}

.footer-brand p {
  color: #989898;
  font-size: 0.9rem;
  line-height: 1.7;
}

.footer-col h4 {
  font-size: 0.95rem;
  font-weight: 800;
  margin-bottom: 16px;
  color: #2D2D2D;
  letter-spacing: 1px;
  position: relative;
  padding-bottom: 8px;
}

.footer-col h4::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 24px;
  height: 2.5px;
  background: linear-gradient(90deg, #FF5A5F, #FFD166);
  border-radius: 2px;
}

.footer-col a {
  display: block;
  color: #7A7A7A;
  text-decoration: none;
  padding: 5px 0;
  font-size: 0.88rem;
  transition: all 0.25s;
}

.footer-col a:hover {
  color: #FF5A5F;
  transform: translateX(6px);
}

.footer-bottom {
  border-top: 1px solid rgba(0, 0, 0, 0.06);
  margin-top: 48px;
  padding-top: 24px;
  text-align: center;
  font-size: 0.85rem;
  color: #A0A0A0;
}

.footer-bottom a {
  color: #FF5A5F;
  text-decoration: none;
  font-weight: 600;
}

/* ============================================
   工具类
   ============================================ */

.text-accent {
  color: #FF5A5F;
}

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

.seo-description {
  max-width: 640px;
  margin: 0 auto 48px;
  color: #8A8A8A;
  line-height: 1.7;
  font-size: 0.95rem;
}

.mt-0 {
  margin-top: 0;
}

.mb-0 {
  margin-bottom: 0;
}

/* ============================================
   动画
   ============================================ */

@keyframes danmakuFloat {
  0%, 100% {
    transform: translateY(0) rotate(var(--r, 0deg));
  }
  50% {
    transform: translateY(-14px) rotate(var(--r, 0deg));
  }
}

@keyframes breathe {
  0%, 100% {
    transform: scale(1);
    opacity: 0.08;
  }
  50% {
    transform: scale(1.15);
    opacity: 0.14;
  }
}

/* ============================================
   响应式
   ============================================ */

@media (max-width: 992px) {
  .feature-block {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .feature-image {
    max-width: 560px;
    margin: 0 auto;
  }

  .hero h1 {
    font-size: clamp(2.6rem, 5vw, 3.6rem);
  }

  .hero-image {
    max-width: 100%;
  }

  .hero::after {
    left: 20%;
  }
}

@media (max-width: 768px) {
  .section {
    padding: 56px 0;
  }

  .hero {
    min-height: auto;
    padding: 100px 0 40px;
  }

  .hero-content {
    padding: 30px 0;
  }

  .feature-block {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .stats-bar {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .stat-item {
    padding: 24px 16px;
  }

  .stat-number {
    font-size: 2.2rem;
  }

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

  .site-footer {
    padding: 48px 0 24px;
  }

  .main-nav {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    width: 100%;
    background: rgba(254, 250, 245, 0.97);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    padding: 28px 24px;
    flex-direction: column;
    align-items: flex-start;
    gap: 18px;
    border-bottom: 1px solid rgba(255, 90, 95, 0.08);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.08);
    z-index: 999;
  }

  .main-nav li {
    width: 100%;
  }

  .main-nav a {
    display: block;
    font-size: 1rem;
    padding: 8px 0;
  }

  .main-nav.open {
    display: flex;
  }

  .menu-toggle {
    display: flex;
  }

  .hero-buttons {
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
  }

  .hero-buttons .btn {
    justify-content: center;
  }

  .cta-banner {
    padding: 48px 24px;
  }

  .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: 24px;
  }

  .hero h1 {
    font-size: 2.4rem;
    letter-spacing: -1.5px;
  }

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

  .hero::before {
    top: 8%;
    left: 4%;
    font-size: 0.72rem;
    padding: 6px 14px;
  }

  .hero::after {
    bottom: 8%;
    left: 20%;
    font-size: 0.7rem;
    padding: 5px 12px;
  }

  .hero-image {
    margin: 10px 0;
    border-radius: 20px;
  }

  .hero-image::before,
  .hero-image::after {
    display: none;
  }

  .section-title {
    font-size: 1.8rem;
  }

  .section-desc {
    font-size: 0.95rem;
    margin-bottom: 32px;
  }

  .category-card {
    transform: none !important;
  }

  .category-card:hover {
    transform: translateY(-6px) !important;
  }

  .btn {
    padding: 12px 24px;
    font-size: 0.9rem;
  }

  .stat-number {
    font-size: 1.9rem;
  }

  .cta-banner h2 {
    font-size: 1.6rem;
  }

  .cta-banner::after {
    font-size: 12rem;
    bottom: -50px;
  }

  .footer-bottom {
    font-size: 0.78rem;
  }
}

/* ============================================
   滚动条 (可选)
   ============================================ */

::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: #F9F3EC;
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, #FF5A5F, #FFB800);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, #E84A4F, #E6A400);
}

/* ============================================
   选中文本
   ============================================ */

::selection {
  background: rgba(255, 90, 95, 0.85);
  color: #fff;
}