*, *::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:
    radial-gradient(circle at 10% 30%, rgba(255, 159, 67, 0.05) 0%, transparent 50%),
    radial-gradient(circle at 90% 70%, rgba(255, 77, 90, 0.05) 0%, transparent 50%),
    #FFFDF6;
  color: #1A1A2E;
  line-height: 1.7;
}

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

.section { padding:90px 0; position:relative; overflow:hidden; }
.section:nth-child(even) { background:#FFF5EC; }

/* ========== 导航 — 悬浮胶囊式 ========== */
.site-header {
  position:fixed;
  top:0; left:0; width:100%;
  z-index:1000;
  background:rgba(255, 253, 246, 0.92);
  backdrop-filter:blur(20px);
  -webkit-backdrop-filter:blur(20px);
  border-bottom:2px solid rgba(255, 77, 90, 0.08);
  box-shadow:0 4px 30px rgba(255, 77, 90, 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:#1A1A2E;
  letter-spacing:-0.5px;
}
.logo-icon {
  width:38px; height:38px;
  border-radius:12px;
  background:linear-gradient(135deg, #FF4D5A, #FF9F43);
  color:#fff;
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:0.9rem;
  box-shadow:0 4px 14px rgba(255, 77, 90, 0.35);
}
.main-nav {
  display:flex;
  align-items:center;
  gap:30px;
  list-style:none;
}
.main-nav a {
  text-decoration:none;
  font-size:0.92rem;
  font-weight:600;
  color:#1A1A2E;
  padding:6px 2px;
  position:relative;
  transition:0.25s;
  letter-spacing:0.3px;
}
.main-nav a::after {
  content:'';
  position:absolute;
  bottom:-4px; left:0;
  width:0; height:3px;
  border-radius:3px;
  background:linear-gradient(90deg, #FF4D5A, #FF9F43);
  transition:0.3s;
}
.main-nav a:hover { color:#FF4D5A; }
.main-nav a:hover::after { width:100%; }
.nav-cta {
  padding:10px 26px !important;
  border-radius:50px !important;
  background:linear-gradient(135deg, #FF4D5A, #FF6B81) !important;
  color:#fff !important;
  font-weight:700 !important;
  box-shadow:0 4px 18px rgba(255, 77, 90, 0.35);
}
.nav-cta::after { display:none; }
.nav-cta:hover { transform:translateY(-2px); box-shadow:0 8px 24px rgba(255,77,90,0.4); }

.menu-toggle {
  display:none;
  width:42px; height:42px;
  background:linear-gradient(135deg, #FF4D5A, #FF9F43);
  border:none;
  border-radius:12px;
  color:#fff;
  font-size:1.4rem;
  cursor:pointer;
  align-items:center;
  justify-content:center;
  box-shadow:0 4px 14px rgba(255,77,90,0.3);
}

/* ========== Hero — 渐变视界 ========== */
.hero {
  min-height:80vh;
  display:flex;
  align-items:center;
  gap:60px;
  position:relative;
  overflow:hidden;
  background:
    radial-gradient(ellipse at 20% 50%, rgba(255,159,67,0.15) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 20%, rgba(255,77,90,0.12) 0%, transparent 55%),
    #FFFDF6;
}
.hero::before {
  content:'';
  position:absolute;
  width:520px; height:520px;
  border-radius:50%;
  border:3px dashed rgba(255,77,90,0.12);
  right:-140px; top:50%;
  transform:translateY(-50%);
  pointer-events:none;
  animation:spin 40s linear infinite;
}
.hero::after {
  content:'';
  position:absolute;
  width:90px; height:90px;
  border-radius:50%;
  background:radial-gradient(circle, rgba(255,159,67,0.25), transparent 70%);
  left:8%; bottom:12%;
  pointer-events:none;
  animation:pulse 5s ease-in-out infinite;
}
@keyframes spin {
  to { transform:translateY(-50%) rotate(360deg); }
}
@keyframes pulse {
  0%, 100% { transform:scale(1); opacity:0.5; }
  50% { transform:scale(1.25); opacity:1; }
}

.hero-content {
  flex:1;
  max-width:720px;
  position:relative;
  z-index:2;
  padding:40px 0;
}
.hero-eyebrow {
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:0.85rem;
  font-weight:800;
  padding:6px 20px;
  border-radius:30px;
  background:#FFE8E8;
  color:#FF4D5A;
  margin-bottom:22px;
  letter-spacing:0.8px;
  text-transform:uppercase;
}
.hero-eyebrow::before {
  content:'▶';
  font-size:0.65rem;
}
.hero h1 {
  font-size:3.6rem;
  line-height:1.1;
  font-weight:900;
  margin-bottom:24px;
  letter-spacing:-2px;
  background:linear-gradient(120deg, #FF4D5A 0%, #FF9F43 60%, #FFD166 100%);
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  background-clip:text;
}
.hero p {
  font-size:1.1rem;
  opacity:0.7;
  max-width:560px;
  margin-bottom:36px;
  line-height:1.8;
}
.hero-buttons {
  display:flex;
  gap:16px;
  flex-wrap:wrap;
}
.hero-image {
  flex:0 0 480px;
  max-width:55%;
  border-radius:28px;
  overflow:hidden;
  box-shadow:
    0 24px 60px rgba(255,77,90,0.18),
    0 0 0 6px #fff,
    0 0 0 10px rgba(255,77,90,0.08);
  transform:rotate(2deg);
  transition:0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
  position:relative;
  z-index:2;
}
.hero-image:hover {
  transform:rotate(0deg) scale(1.02);
  box-shadow:
    0 30px 70px rgba(255,77,90,0.25),
    0 0 0 6px #fff,
    0 0 0 12px rgba(255,77,90,0.12);
}
.hero-image img {
  width:100%;
  height:auto;
  display:block;
}

/* ========== 按钮 — 糖果胶囊 ========== */
.btn {
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:14px 32px;
  border-radius:50px;
  font-weight:700;
  cursor:pointer;
  border:none;
  text-decoration:none;
  transition:0.25s all;
  font-size:0.95rem;
  letter-spacing:0.3px;
}
.btn-primary {
  background:linear-gradient(135deg, #FF4D5A, #FF6B81);
  color:#fff;
  box-shadow:0 8px 24px rgba(255,77,90,0.35);
}
.btn-primary:hover {
  transform:translateY(-3px);
  box-shadow:0 14px 30px rgba(255,77,90,0.45);
}
.btn-outline {
  background:transparent;
  border:2px solid #FF4D5A;
  color:#FF4D5A;
}
.btn-outline:hover {
  background:#FFE8E8;
  transform:translateY(-3px);
}

/* ========== 标签 / 标题 ========== */
.section-label {
  display:inline-block;
  font-size:0.78rem;
  font-weight:800;
  letter-spacing:3px;
  text-transform:uppercase;
  margin-bottom:16px;
  color:#FF4D5A;
  background:#FFE8E8;
  padding:6px 20px;
  border-radius:30px;
}
.section-title {
  font-size:2.3rem;
  font-weight:900;
  margin-bottom:16px;
  line-height:1.2;
  letter-spacing:-1px;
  position:relative;
  padding-bottom:14px;
}
.section-title::after {
  content:'';
  position:absolute;
  bottom:0; left:0;
  width:56px; height:5px;
  border-radius:5px;
  background:linear-gradient(90deg, #FF4D5A, #FF9F43);
}
.section-title.text-center::after {
  left:50%;
  transform:translateX(-50%);
}
.section-desc {
  max-width:600px;
  opacity:0.65;
  margin-bottom:48px;
  font-size:1rem;
  line-height:1.7;
}

/* ========== 卡片网格 — 视频卡片 ========== */
.cards-grid {
  display:grid;
  grid-template-columns:repeat(auto-fill, minmax(260px, 1fr));
  gap:28px;
}
.category-card {
  border-radius:22px;
  padding:32px;
  background:#fff;
  border:2px solid transparent;
  transition:0.35s all;
  position:relative;
  overflow:hidden;
  box-shadow:0 4px 18px rgba(0,0,0,0.03);
}
.category-card::before {
  content:'▶';
  position:absolute;
  top:24px; right:24px;
  width:36px; height:36px;
  background:linear-gradient(135deg, #FF4D5A, #FF9F43);
  border-radius:50%;
  display:flex;
  align-items:center;
  justify-content:center;
  color:#fff;
  font-size:0.7rem;
  opacity:0;
  transform:scale(0.3);
  transition:0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.category-card:hover {
  transform:translateY(-8px);
  box-shadow:0 24px 48px rgba(255,77,90,0.12);
  border-color:rgba(255,77,90,0.12);
}
.category-card:hover::before {
  opacity:1;
  transform:scale(1);
}
.card-icon {
  width:54px; height:54px;
  border-radius:16px;
  display:flex;
  align-items:center;
  justify-content:center;
  margin-bottom:20px;
  font-size:1.4rem;
  background:#FFF0F0;
  color:#FF4D5A;
  transition:0.3s;
}
.category-card:hover .card-icon {
  transform:scale(1.05) rotate(-5deg);
}
.category-card:nth-child(2) .card-icon { background:#FFF4E0; color:#FF9F43; }
.category-card:nth-child(3) .card-icon { background:#E8F8F0; color:#10AC84; }
.category-card:nth-child(4) .card-icon { background:#E8F0FF; color:#2E86DE; }
.card-link {
  font-weight:800;
  font-size:0.88rem;
  text-decoration:none;
  color:#FF4D5A;
  display:inline-flex;
  align-items:center;
  gap:4px;
  transition:0.25s;
}
.card-link:hover { gap:10px; }
.category-card p {
  opacity:0.7;
  font-size:0.9rem;
  margin-bottom:16px;
  line-height:1.6;
}

/* ========== 特性块 ========== */
.feature-block {
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:64px;
  align-items:center;
}
.feature-image {
  border-radius:24px;
  overflow:hidden;
  box-shadow:0 24px 48px rgba(0,0,0,0.06);
  border:5px solid #fff;
  position:relative;
  transition:0.35s;
}
.feature-image:hover {
  transform:scale(1.02) rotate(-1deg);
  box-shadow:0 30px 60px rgba(255,77,90,0.12);
}
.feature-image img {
  width:100%;
  height:auto;
  display:block;
}
.feature-text { }
.feature-list {
  list-style:none;
  margin-top:24px;
}
.feature-list li {
  padding:10px 0;
  display:flex;
  align-items:center;
  gap:14px;
  font-weight:500;
  font-size:0.98rem;
}
.feature-list li::before {
  content:'✓';
  font-weight:900;
  width:30px; height:30px;
  background:linear-gradient(135deg, #FF4D5A, #FF9F43);
  border-radius:50%;
  display:flex;
  align-items:center;
  justify-content:center;
  color:#fff;
  font-size:0.75rem;
  flex-shrink:0;
  box-shadow:0 2px 8px rgba(255,77,90,0.25);
}

/* ========== 数据条 — 彩色统计 ========== */
.stats-bar {
  display:grid;
  grid-template-columns:repeat(4, 1fr);
  gap:28px;
  text-align:center;
}
.stat-item {
  padding:36px 20px;
  border-radius:26px;
  background:#fff;
  border:none;
  box-shadow:0 8px 24px rgba(0,0,0,0.04);
  position:relative;
  overflow:hidden;
  transition:0.35s;
}
.stat-item:hover {
  transform:translateY(-6px);
  box-shadow:0 20px 40px rgba(0,0,0,0.08);
}
.stat-item::before {
  content:'';
  position:absolute;
  top:0; left:0;
  width:100%; height:5px;
  background:linear-gradient(90deg, #FF4D5A, #FF9F43);
}
.stat-item:nth-child(2)::before { background:linear-gradient(90deg, #FF9F43, #FFD166); }
.stat-item:nth-child(3)::before { background:linear-gradient(90deg, #10AC84, #00D2D3); }
.stat-item:nth-child(4)::before { background:linear-gradient(90deg, #2E86DE, #A29BFE); }
.stat-number {
  font-size:2.6rem;
  font-weight:900;
  line-height:1.2;
  background:linear-gradient(135deg, #FF4D5A, #FF9F43);
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  background-clip:text;
}
.stat-item:nth-child(2) .stat-number {
  background:linear-gradient(135deg, #FF9F43, #FFD166);
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  background-clip:text;
}
.stat-item:nth-child(3) .stat-number {
  background:linear-gradient(135deg, #10AC84, #00D2D3);
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  background-clip:text;
}
.stat-item:nth-child(4) .stat-number {
  background:linear-gradient(135deg, #2E86DE, #A29BFE);
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  background-clip:text;
}
.stat-label {
  font-size:0.9rem;
  opacity:0.6;
  margin-top:10px;
  font-weight:600;
  letter-spacing:0.5px;
}

/* ========== 内容墙 — 视频瀑布 ========== */
.content-wall {
  display:grid;
  grid-template-columns:repeat(auto-fill, minmax(280px, 1fr));
  gap:28px;
}
.content-wall-item {
  border-radius:20px;
  overflow:hidden;
  background:#fff;
  border:2px solid #F0EEED;
  transition:0.35s;
}
.content-wall-item:hover {
  transform:translateY(-6px) rotate(-1deg);
  box-shadow:0 20px 40px rgba(255,77,90,0.1);
  border-color:#FFE0E0;
}
.content-wall-item img {
  width:100%;
  height:200px;
  object-fit:cover;
  display:block;
  transition:0.35s;
}
.content-wall-item:hover img {
  transform:scale(1.04);
}
.content-wall-body {
  padding:22px;
}

/* ========== FAQ ========== */
.faq-list { max-width:800px; margin:0 auto; }
.faq-item {
  border:none;
  border-radius:16px;
  margin-bottom:12px;
  background:#fff;
  box-shadow:0 4px 14px rgba(0,0,0,0.03);
  overflow:hidden;
  cursor:pointer;
  transition:0.25s;
}
.faq-item:hover {
  box-shadow:0 10px 24px rgba(255,77,90,0.1);
}
.faq-item .faq-question {
  padding:20px 24px;
  font-weight:700;
  display:flex;
  justify-content:space-between;
  align-items:center;
  font-size:1rem;
  transition:0.25s;
}
.faq-question::after {
  content:'＋';
  font-size:1.2rem;
  color:#FF4D5A;
  width:32px; height:32px;
  background:#FFF0F0;
  border-radius:50%;
  display:flex;
  align-items:center;
  justify-content:center;
  transition:0.35s;
  flex-shrink:0;
  font-weight:700;
}
.faq-item.open .faq-question::after {
  transform:rotate(45deg);
  background:linear-gradient(135deg, #FF4D5A, #FF9F43);
  color:#fff;
}
.faq-item .faq-answer {
  padding:0 24px 22px;
  display:none;
  opacity:0.7;
  line-height:1.8;
  font-size:0.95rem;
}
.faq-item.open .faq-answer { display:block; }

/* ========== CTA 横幅 ========== */
.cta-banner {
  padding:64px 48px;
  text-align:center;
  border-radius:32px;
  background:linear-gradient(135deg, #FF4D5A 0%, #FF9F43 100%);
  color:#fff;
  position:relative;
  overflow:hidden;
  box-shadow:0 24px 60px rgba(255,77,90,0.25);
}
.cta-banner::before {
  content:'▶';
  position:absolute;
  font-size:10rem;
  opacity:0.08;
  top:50%;
  left:50%;
  transform:translate(-50%, -50%);
  pointer-events:none;
}
.cta-banner::after {
  content:'';
  position:absolute;
  width:200px; height:200px;
  border-radius:50%;
  border:2px dashed rgba(255,255,255,0.25);
  top:-60px; right:-60px;
  pointer-events:none;
}
.cta-banner h2 {
  color:#fff;
  font-size:2.2rem;
  margin-bottom:14px;
  position:relative;
  z-index:1;
  letter-spacing:-0.5px;
}
.cta-banner .btn-primary {
  background:#fff;
  color:#FF4D5A !important;
  box-shadow:0 8px 24px rgba(0,0,0,0.15);
  position:relative;
  z-index:1;
}
.cta-banner .btn-primary:hover {
  background:#FFF0F0;
  transform:translateY(-3px);
}

/* ========== 页脚 ========== */
.site-footer {
  padding:64px 0 32px;
  background:#FFF5EC;
  border-radius:48px 48px 0 0;
  margin-top:80px;
}
.footer-grid {
  display:grid;
  grid-template-columns:2fr 1fr 1fr 1fr;
  gap:48px;
}
.footer-brand p {
  opacity:0.65;
  font-size:0.9rem;
  line-height:1.7;
  margin-top:18px;
  max-width:280px;
}
.footer-col h4 {
  font-size:1rem;
  font-weight:800;
  margin-bottom:18px;
  color:#1A1A2E;
  letter-spacing:0.5px;
}
.footer-col a {
  color:rgba(26,26,46,0.7);
  text-decoration:none;
  display:block;
  padding:5px 0;
  transition:0.2s;
  font-size:0.9rem;
}
.footer-col a:hover {
  color:#FF4D5A;
  padding-left:6px;
}
.footer-bottom {
  border-top:1px solid rgba(26,26,46,0.08);
  margin-top:48px;
  padding-top:24px;
  text-align:center;
  font-size:0.85rem;
  color:rgba(26,26,46,0.5);
  letter-spacing:0.3px;
}

/* ========== 工具类 ========== */
.text-accent { color:#FF4D5A; }
.text-center { text-align:center; }
.seo-description {
  max-width:600px;
  margin:0 auto 48px;
  opacity:0.7;
  text-align:center;
  line-height:1.8;
}
.mt-0 { margin-top:0; }
.mb-0 { margin-bottom:0; }

/* ========== 响应式 ========== */
@media (max-width: 992px) {
  .hero h1 { font-size:2.8rem; }
  .hero-image { flex-basis:380px; }
  .feature-block { gap:40px; }
}

@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:72px; left:0;
    width:100%;
    background:#FFFDF6;
    padding:24px;
    box-shadow:0 16px 32px rgba(0,0,0,0.08);
    border-radius:0 0 24px 24px;
    gap:8px;
  }
  .main-nav.open li { width:100%; }
  .main-nav.open a { display:block; padding:12px 16px; }
  .main-nav.open .nav-cta { text-align:center; margin-top:8px; }
  .hero {
    flex-direction:column;
    gap:40px;
    padding-top:80px;
  }
  .hero-content { max-width:100%; text-align:center; }
  .hero h1 { font-size:2.4rem; }
  .hero p { margin-left:auto; margin-right:auto; }
  .hero-buttons { justify-content:center; }
  .hero-image { flex-basis:auto; max-width:100%; transform:none; }
  .hero-image:hover { transform:scale(1.01); }
  .section-title { font-size:1.8rem; }
  .section-title::after { left:50%; transform:translateX(-50%); }
  .section-desc { margin-left:auto; margin-right:auto; text-align:center; }
  .section-label { display:inline-block; }
  .cta-banner { padding:48px 24px; }
  .cta-banner h2 { font-size:1.7rem; }
}

@media (max-width: 480px) {
  .cards-grid, .content-wall, .stats-bar { grid-template-columns:1fr; }
  .footer-grid { grid-template-columns:1fr; }
  .hero-buttons { flex-direction:column; }
  .hero h1 { font-size:1.9rem; }
  .hero p { font-size:1rem; }
  .cardntainer { padding:0 16px; }
  .cta-banner .btn-primary { width:100%; justify-content:center; }
  .btn { width:100%; justify-content:center; }
}