/* ============================================
   原神本子 · 珊瑚屿设计系统
   Coral Reef Design System
   ============================================ */

*, *::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: #FAF7F2;
  background-image: radial-gradient(rgba(255, 109, 90, 0.04) 1px, transparent 1px);
  background-size: 28px 28px;
  color: #2D2D35;
  line-height: 1.7;
}

::selection {
  background: rgba(255, 109, 90, 0.18);
  color: #2D2D35;
}

/* ===== 核心布局 ===== */
.container { max-width:1200px; margin:0 auto; padding:0 24px; position:relative; z-index:2; }

.section { padding:96px 0; position:relative; overflow:hidden; }
.section:nth-child(even) { background:#F8F5F0; }

/* 装饰性圆点 */
.section::before {
  content:'';
  position:absolute;
  width:260px; height:260px;
  border-radius:50%;
  background: radial-gradient(circle, rgba(46,196,182,0.06) 0%, transparent 70%);
  top:20%; right:-80px;
  pointer-events:none;
  z-index:1;
}
.section::after {
  content:'';
  position:absolute;
  width:160px; height:160px;
  border-radius:50%;
  background: radial-gradient(circle, rgba(255,109,90,0.06) 0%, transparent 70%);
  bottom:10%; left:-40px;
  pointer-events:none;
  z-index:1;
}

/* ===== 导航栏 ===== */
.site-header {
  position:fixed; top:0; left:0; width:100%; z-index:1000;
  background:rgba(250,247,242,0.82);
  backdrop-filter:blur(20px) saturate(180%);
  -webkit-backdrop-filter:blur(20px) saturate(180%);
  border-bottom:1px solid rgba(255,109,90,0.08);
  box-shadow:0 2px 20px rgba(45,45,53,0.03);
}
.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:800; font-size:1.25rem;
  text-decoration:none; color:#2D2D35;
  letter-spacing:-0.5px;
}
.logo-icon {
  width:38px; height:38px; border-radius:12px;
  display:flex; align-items:center; justify-content:center;
  font-size:1rem;
  background:linear-gradient(135deg,#FF6D5A,#FFB27F);
  color:#fff;
  box-shadow:0 4px 14px rgba(255,109,90,0.3);
}

.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;
  color:rgba(45,45,53,0.7);
  position:relative;
  transition:color 0.25s ease;
}
.main-nav a::after {
  content:'';
  position:absolute; left:0; bottom:-4px;
  width:0; height:2px; border-radius:2px;
  background:linear-gradient(90deg,#FF6D5A,#FFB27F);
  transition:width 0.35s cubic-bezier(0.4,0,0.2,1);
}
.main-nav a:hover { color:#FF6D5A; }
.main-nav a:hover::after { width:100%; }

.nav-cta {
  padding:9px 24px; border-radius:10px;
  color:#fff!important; font-weight:600;
  background:linear-gradient(135deg,#FF6D5A,#FF8E72);
  box-shadow:0 4px 14px rgba(255,109,90,0.25);
}
.nav-cta::after { display:none; }
.nav-cta:hover {
  color:#fff!important;
  transform:translateY(-1px);
  box-shadow:0 8px 20px rgba(255,109,90,0.35);
}

.menu-toggle {
  display:none; flex-direction:column; gap:6px;
  background:none; border:none; cursor:pointer; padding:10px;
}
.menu-toggle span {
  width:24px; height:2px;
  background:#2D2D35; border-radius:2px;
  transition:all 0.3s ease;
}

/* ===== Hero 区块 ===== */
.hero {
  min-height:88vh;
  display:flex; align-items:center;
  position:relative; overflow:hidden;
  background:linear-gradient(135deg,#FFF4F0 0%, #F6FDF9 50%, #FFF9EF 100%);
}
.hero::before {
  content:'';
  position:absolute;
  width:480px; height:480px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(255,109,90,0.12) 0%,transparent 70%);
  top:5%; left:-80px;
  pointer-events:none;
}
.hero::after {
  content:'';
  position:absolute;
  width:340px; height:340px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(46,196,182,0.10) 0%,transparent 70%);
  bottom:0; right:22%;
  pointer-events:none;
}

.hero-content { max-width:720px; position:relative; z-index:2; }
.hero-eyebrow {
  display:inline-block;
  font-size:0.82rem; font-weight:700;
  padding:6px 20px; border-radius:30px;
  margin-bottom:22px;
  background:rgba(255,109,90,0.08);
  color:#FF6D5A;
  letter-spacing:1px;
  border:1px solid rgba(255,109,90,0.12);
}
.hero h1 {
  font-size:3.3rem; font-weight:800;
  line-height:1.12; margin-bottom:22px;
  letter-spacing:-1px;
  background:linear-gradient(120deg,#2D2D35 20%,#FF6D5A 80%);
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  background-clip:text;
}
.hero p {
  font-size:1.15rem;
  opacity:0.65;
  max-width:560px;
  margin-bottom:36px;
  line-height:1.85;
}
.hero-buttons { display:flex; gap:14px; flex-wrap:wrap; }

.hero-image {
  border-radius:24px;
  overflow:hidden;
  box-shadow:0 24px 60px rgba(255,109,90,0.16);
  position:relative; z-index:2;
}
.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:12px;
  font-weight:600; cursor:pointer;
  border:none; text-decoration:none;
  transition:all 0.25s ease;
  font-size:0.95rem;
}
.btn-primary {
  color:#fff;
  background:linear-gradient(135deg,#FF6D5A,#FF8E72);
  box-shadow:0 6px 20px rgba(255,109,90,0.3);
}
.btn-primary:hover {
  transform:translateY(-2px);
  box-shadow:0 12px 32px rgba(255,109,90,0.4);
}
.btn-outline {
  background:transparent;
  border:1.5px solid rgba(45,45,53,0.15);
  color:#2D2D35;
}
.btn-outline:hover {
  border-color:#FF6D5A;
  color:#FF6D5A;
  transform:translateY(-2px);
}

/* ===== 标题 / 标签 ===== */
.section-label {
  display:inline-flex; align-items:center; gap:10px;
  font-size:0.78rem; font-weight:700;
  letter-spacing:3px; text-transform:uppercase;
  margin-bottom:14px;
  color:#FF6D5A;
}
.section-label::before {
  content:'';
  width:24px; height:2px; border-radius:2px;
  background:linear-gradient(90deg,#FF6D5A,#FFB27F);
}
.section-title {
  font-size:2.4rem; font-weight:800;
  letter-spacing:-0.5px;
  margin-bottom:14px;
  line-height:1.25;
}
.section-desc {
  max-width:640px;
  opacity:0.65;
  margin-bottom:48px;
  line-height:1.85;
}

/* ===== 卡片网格 ===== */
.cards-grid {
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(270px,1fr));
  gap:28px;
  position:relative; z-index:2;
}
.category-card {
  background:#fff;
  border-radius:20px;
  padding:32px;
  border:1px solid rgba(45,45,53,0.05);
  box-shadow:0 4px 16px rgba(45,45,53,0.03);
  transition:transform 0.35s cubic-bezier(0.4,0,0.2,1), box-shadow 0.35s ease;
  position:relative; overflow:hidden;
}
.category-card::before {
  content:'';
  position:absolute; top:0; left:0; right:0; height:3px;
  background:linear-gradient(90deg,#FF6D5A,#FFB27F,#2EC4B6);
  transform:scaleX(0); transform-origin:left;
  transition:transform 0.45s cubic-bezier(0.4,0,0.2,1);
}
.category-card::after {
  content:'';
  position:absolute;
  width:120px; height:120px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(255,109,90,0.05) 0%,transparent 70%);
  bottom:-30px; right:-30px;
  pointer-events:none;
}
.category-card:hover {
  transform:translateY(-6px);
  box-shadow:0 16px 40px rgba(255,109,90,0.12);
}
.category-card:hover::before { transform:scaleX(1); }
.category-card h3 { font-size:1.15rem; font-weight:700; margin-bottom:10px; }
.category-card p { font-size:0.9rem; opacity:0.6; margin-bottom:20px; line-height:1.7; }

.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:linear-gradient(135deg,#FFF0EB,#FFF);
  color:#FF6D5A;
  box-shadow:0 4px 12px rgba(255,109,90,0.08);
}

.card-link {
  font-weight:600; font-size:0.85rem;
  text-decoration:none;
  color:#FF6D5A;
  display:inline-flex; align-items:center; gap:6px;
  transition:gap 0.25s ease;
}
.card-link:hover { gap:12px; }

/* ===== 特性块 ===== */
.feature-block {
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:64px;
  align-items:center;
  position:relative; z-index:2;
}
.feature-image {
  border-radius:24px;
  overflow:hidden;
  box-shadow:0 20px 50px rgba(46,196,182,0.12);
}
.feature-image img { width:100%; height:auto; display:block; }
.feature-text h3 { font-size:1.7rem; font-weight:800; letter-spacing:-0.5px; margin-bottom:14px; }
.feature-text > p { opacity:0.65; margin-bottom:24px; line-height:1.85; }

.feature-list { list-style:none; }
.feature-list li {
  padding:8px 0;
  display:flex; align-items:center; gap:12px;
  font-size:0.95rem;
}
.feature-list li::before {
  content:'✓';
  font-weight:700;
  display:flex; align-items:center; justify-content:center;
  width:24px; height:24px;
  border-radius:50%;
  background:linear-gradient(135deg,#2EC4B6,#8FE3DA);
  color:#fff;
  font-size:0.7rem;
  flex-shrink:0;
  box-shadow:0 2px 8px rgba(46,196,182,0.2);
}

/* ===== 数据条 ===== */
.stats-bar {
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:28px;
  text-align:center;
  position:relative; z-index:2;
}
.stat-item {
  background:#fff;
  padding:36px 20px;
  border-radius:20px;
  border:1px solid rgba(45,45,53,0.05);
  box-shadow:0 4px 16px rgba(45,45,53,0.03);
  transition:transform 0.3s ease, box-shadow 0.3s ease;
  position:relative; overflow:hidden;
}
.stat-item::before {
  content:'';
  position:absolute;
  top:0; left:50%; transform:translateX(-50%);
  width:40px; height:3px;
  border-radius:0 0 4px 4px;
  background:linear-gradient(90deg,#FF6D5A,#FFB27F);
}
.stat-item:hover {
  transform:translateY(-4px);
  box-shadow:0 12px 32px rgba(255,109,90,0.1);
}
.stat-number {
  font-size:2.6rem; font-weight:800;
  letter-spacing:-1px;
  line-height:1.15;
  background:linear-gradient(120deg,#FF6D5A,#FFB27F);
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  background-clip:text;
}
.stat-label {
  font-size:0.9rem;
  opacity:0.6;
  margin-top:8px;
  letter-spacing:0.5px;
}

/* ===== 内容墙 ===== */
.content-wall {
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(280px,1fr));
  gap:28px;
  position:relative; z-index:2;
}
.content-wall-item {
  background:#fff;
  border-radius:20px;
  overflow:hidden;
  border:1px solid rgba(45,45,53,0.05);
  box-shadow:0 4px 16px rgba(45,45,53,0.03);
  transition:transform 0.35s ease, box-shadow 0.35s ease;
}
.content-wall-item:hover {
  transform:translateY(-5px);
  box-shadow:0 16px 40px rgba(255,109,90,0.12);
}
.content-wall-item img {
  width:100%; height:220px;
  object-fit:cover;
  transition:transform 0.5s ease;
}
.content-wall-item:hover img { transform:scale(1.04); }
.content-wall-body { padding:24px; }
.content-wall-body h4 {
  font-size:1.1rem; font-weight:700;
  margin-bottom:8px;
  letter-spacing:-0.2px;
}
.content-wall-body p {
  font-size:0.9rem;
  opacity:0.6;
  line-height:1.65;
}
.content-wall-body .wall-tag {
  display:inline-block;
  font-size:0.7rem;
  font-weight:600;
  padding:4px 12px;
  border-radius:20px;
  background:rgba(46,196,182,0.1);
  color:#2EC4B6;
  margin-bottom:12px;
  letter-spacing:0.5px;
}

/* ===== FAQ ===== */
.faq-list {
  max-width:820px;
  margin:0 auto;
  position:relative; z-index:2;
}
.faq-item {
  background:#fff;
  border:1px solid rgba(45,45,53,0.05);
  border-radius:16px;
  margin-bottom:12px;
  overflow:hidden;
  cursor:pointer;
  box-shadow:0 2px 10px rgba(45,45,53,0.02);
  transition:box-shadow 0.3s ease, border-color 0.3s ease;
}
.faq-item:hover {
  box-shadow:0 8px 24px rgba(255,109,90,0.08);
  border-color:rgba(255,109,90,0.12);
}
.faq-item.open {
  border-color:rgba(255,109,90,0.2);
  box-shadow:0 8px 24px rgba(255,109,90,0.1);
}
.faq-item .faq-question {
  padding:22px 28px;
  font-weight:600; font-size:1.05rem;
  display:flex; justify-content:space-between; align-items:center;
  color:#2D2D35;
}
.faq-item .faq-question::after {
  content:'+';
  font-size:1.6rem; font-weight:300;
  color:#FF6D5A;
  transition:transform 0.3s ease;
  line-height:1;
}
.faq-item.open .faq-question::after {
  content:'−';
  transform:rotate(180deg);
}
.faq-item .faq-answer {
  padding:0 28px 24px;
  display:none;
  opacity:0.65;
  line-height:1.85;
  font-size:0.95rem;
}
.faq-item.open .faq-answer { display:block; }

/* ===== CTA 横幅 ===== */
.cta-banner {
  padding:72px 48px;
  text-align:center;
  border-radius:24px;
  color:#fff;
  position:relative;
  overflow:hidden;
  background:linear-gradient(135deg,#FF6D5A,#FF8E72 50%,#FFB27F);
  box-shadow:0 24px 64px rgba(255,109,90,0.25);
}
.cta-banner::before {
  content:'';
  position:absolute;
  width:240px; height:240px;
  border-radius:50%;
  background:rgba(255,255,255,0.12);
  top:-60px; right:-40px;
  pointer-events:none;
}
.cta-banner::after {
  content:'';
  position:absolute;
  width:160px; height:160px;
  border-radius:50%;
  background:rgba(255,255,255,0.1);
  bottom:-50px; left:-30px;
  pointer-events:none;
}
.cta-banner h2 {
  color:#fff;
  font-size:2.2rem;
  font-weight:800;
  margin-bottom:14px;
  letter-spacing:-0.5px;
  position:relative; z-index:2;
}
.cta-banner p {
  color:rgba(255,255,255,0.9);
  margin-bottom:32px;
  font-size:1.05rem;
  position:relative; z-index:2;
}
.cta-banner .btn-primary {
  background:#fff;
  color:#FF6D5A;
  box-shadow:0 4px 20px rgba(255,255,255,0.3);
  position:relative; z-index:2;
}
.cta-banner .btn-primary:hover {
  transform:translateY(-2px);
  box-shadow:0 8px 28px rgba(255,255,255,0.45);
}

/* ===== 页脚 ===== */
.site-footer {
  background:#F8F5F0;
  padding:80px 0 32px;
  margin-top:96px;
  position:relative;
}
.footer-grid {
  display:grid;
  grid-template-columns:2fr 1fr 1fr 1fr;
  gap:48px;
}
.footer-brand p {
  opacity:0.6;
  font-size:0.9rem;
  max-width:280px;
  margin-top:18px;
  line-height:1.8;
}
.footer-brand .logo-icon {
  background:linear-gradient(135deg,#2EC4B6,#8FE3DA);
  box-shadow:0 4px 14px rgba(46,196,182,0.2);
}
.footer-col h5 {
  font-size:1rem;
  font-weight:700;
  margin-bottom:20px;
  color:#2D2D35;
  letter-spacing:0.5px;
}
.footer-col a {
  display:block;
  color:rgba(45,45,53,0.6);
  text-decoration:none;
  margin-bottom:12px;
  font-size:0.9rem;
  transition:color 0.2s ease, padding-left 0.2s ease;
}
.footer-col a:hover {
  color:#FF6D5A;
  padding-left:4px;
}
.footer-bottom {
  border-top:1px solid rgba(45,45,53,0.08);
  margin-top:56px;
  padding-top:24px;
  text-align:center;
  font-size:0.85rem;
  color:rgba(45,45,53,0.5);
}

/* ===== 工具类 ===== */
.text-accent { color:#FF6D5A; }
.text-center { text-align:center; }
.seo-description {
  max-width:640px;
  margin:0 auto 56px;
  opacity:0.65;
  line-height:1.85;
}

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

/* ===== 响应式 ===== */
@media (max-width: 900px) {
  .hero h1 { font-size:2.8rem; }
  .feature-block { gap:40px; }
}

@media (max-width: 768px) {
  .section { padding:72px 0; }
  .feature-block { grid-template-columns:1fr; gap:40px; }
  .stats-bar { grid-template-columns:repeat(2,1fr); }
  .footer-grid { grid-template-columns:1fr 1fr; gap:40px; }

  .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:rgba(250,247,242,0.98);
    backdrop-filter:blur(20px);
    padding:24px 28px;
    gap:18px;
    box-shadow:0 16px 32px rgba(45,45,53,0.08);
    border-bottom:1px solid rgba(255,109,90,0.08);
  }
  .main-nav.open a { padding:8px 0; font-size:1rem; }
  .main-nav.open .nav-cta { display:inline-flex; justify-content:center; }

  .hero { min-height:auto; padding:140px 0 70px; }
  .hero h1 { font-size:2.4rem; }
  .section-title { font-size:2rem; }
}

@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; align-items:stretch; }
  .btn { justify-content:center; }
  .hero h1 { font-size:2rem; }

  .cta-banner { padding:48px 24px; border-radius:20px; }
  .cta-banner h2 { font-size:1.7rem; }
  .section-title { font-size:1.8rem; }
  .stat-number { font-size:2.2rem; }
}