/* ============================================================
   黑料吃瓜福利 · 设计系统
   风格：Neo-Sticker / 奶油底 + 霓虹糖果色 + 硬边阴影
   ============================================================ */

:root{
  --cream:#FFFCF2;
  --cream-2:#F7F1E1;
  --lilac:#F1ECFF;
  --lilac-2:#E7DEFF;
  --ink:#181233;
  --ink-soft:#544B73;
  --coral:#FF4D6D;
  --violet:#7C5CFF;
  --lime:#CBFF4D;
  --sky:#4FC7F5;
  --mango:#FFB43D;
  --shadow-s:3px 3px 0 var(--ink);
  --shadow-m:5px 5px 0 var(--ink);
  --shadow-l:9px 9px 0 var(--ink);
  --bd:2px solid var(--ink);
  --r-sm:12px;
  --r-md:18px;
  --r-lg:26px;
}

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

html{ scroll-behavior:smooth; -webkit-text-size-adjust:100%; }

body {
  font-family: system-ui, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  overflow-x:hidden;
  background-color:var(--cream);
  background-image:
    radial-gradient(var(--lilac-2) 1.4px, transparent 1.4px),
    radial-gradient(var(--cream-2) 1.4px, transparent 1.4px);
  background-size:34px 34px, 34px 34px;
  background-position:0 0, 17px 17px;
  color:var(--ink);
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
}

::selection{ background:var(--lime); color:var(--ink); }

body::-webkit-scrollbar{ width:12px; }
body::-webkit-scrollbar-track{ background:var(--cream-2); }
body::-webkit-scrollbar-thumb{ background:var(--violet); border:2px solid var(--ink); border-radius:99px; }

img{ display:block; max-width:100%; }
a{ color:inherit; }

/* ============ 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, var(--lilac) 0%, #F6F2FF 100%);
  border-top:2px solid rgba(24,18,51,0.08);
  border-bottom:2px solid rgba(24,18,51,0.08);
}

/* ============ 导航 ============ */
.site-header {
  position:fixed; top:0; left:0; width:100%; z-index:1000;
  background:rgba(255,252,242,0.88);
  backdrop-filter:blur(14px) saturate(160%);
  -webkit-backdrop-filter:blur(14px) saturate(160%);
  border-bottom:var(--bd);
}

.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:900; font-size:1.18rem; letter-spacing:-0.3px;
  text-decoration:none; color:var(--ink);
}

.logo-icon {
  width:36px; height:36px; border-radius:11px;
  display:flex; align-items:center; justify-content:center;
  font-size:1rem;
  background:var(--lime);
  border:var(--bd);
  box-shadow:var(--shadow-s);
  transform:rotate(-7deg);
  transition:transform .25s cubic-bezier(.34,1.56,.64,1);
}
.logo:hover .logo-icon{ transform:rotate(7deg) scale(1.06); }

.main-nav { display:flex; align-items:center; gap:26px; list-style:none; }

.main-nav a {
  text-decoration:none; font-size:0.9rem; font-weight:700;
  color:var(--ink); position:relative; padding:4px 0;
  transition:color .2s ease;
}
.main-nav a::after{
  content:''; position:absolute; left:0; bottom:-2px;
  width:100%; height:3px; border-radius:99px;
  background:var(--coral);
  transform:scaleX(0); transform-origin:left;
  transition:transform .28s cubic-bezier(.65,0,.35,1);
}
.main-nav a:hover{ color:var(--violet); }
.main-nav a:hover::after{ transform:scaleX(1); }

.nav-cta {
  padding:9px 22px; border-radius:99px; color:#fff !important;
  font-weight:800;
  background:var(--coral);
  border:var(--bd);
  box-shadow:var(--shadow-s);
  transition:transform .18s ease, box-shadow .18s ease, background .18s ease;
}
.nav-cta::after{ display:none; }
.nav-cta:hover{
  transform:translate(-2px,-2px);
  box-shadow:5px 5px 0 var(--ink);
  background:var(--violet);
}

.menu-toggle {
  display:none; width:44px; height:44px;
  align-items:center; justify-content:center;
  background:var(--lime); border:var(--bd); border-radius:12px;
  box-shadow:var(--shadow-s); cursor:pointer; font-size:1.1rem;
}

/* ============ Hero ============ */
.hero {
  min-height:70vh; display:flex; align-items:center;
  padding:150px 0 90px; position:relative; overflow:hidden;
}
.hero::before{
  content:''; position:absolute; z-index:0;
  width:420px; height:420px; border-radius:50%;
  background:radial-gradient(circle at 30% 30%, var(--lime), rgba(203,255,77,0) 70%);
  top:40px; right:-140px; opacity:.55; filter:blur(6px);
}
.hero::after{
  content:''; position:absolute; z-index:0;
  width:320px; height:320px; border-radius:46% 54% 60% 40% / 50% 42% 58% 50%;
  background:radial-gradient(circle at 60% 40%, var(--violet), rgba(124,92,255,0) 72%);
  bottom:-120px; left:-110px; opacity:.32; filter:blur(4px);
}

.hero-content { max-width:720px; position:relative; z-index:1; }

.hero-eyebrow {
  display:inline-block; font-size:0.82rem; font-weight:800;
  letter-spacing:1.5px; padding:6px 18px; border-radius:99px;
  margin-bottom:22px;
  background:var(--lime); border:var(--bd);
  box-shadow:var(--shadow-s);
  transform:rotate(-2deg); color:var(--ink);
}

.hero h1 {
  font-size:clamp(2.3rem, 5.2vw, 3.9rem);
  font-weight:900; line-height:1.06; letter-spacing:-1.5px;
  margin-bottom:22px; color:var(--ink);
}
.hero h1 em{
  font-style:normal; position:relative; display:inline-block;
  color:var(--coral); z-index:1;
}
.hero h1 em::after{
  content:''; position:absolute; left:-2%; bottom:6%; z-index:-1;
  width:104%; height:34%; border-radius:6px;
  background:var(--lime); transform:rotate(-1deg);
}

.hero p {
  font-size:1.08rem; color:var(--ink-soft);
  max-width:560px; margin-bottom:34px; line-height:1.85;
}

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

.hero-image {
  border-radius:26px; overflow:hidden;
  border:var(--bd);
  box-shadow:12px 12px 0 var(--violet);
  transform:rotate(-1.2deg);
  background:#fff;
  transition:transform .4s cubic-bezier(.34,1.4,.64,1), box-shadow .4s ease;
}
.hero-image:hover{ transform:rotate(0deg) translateY(-4px); box-shadow:16px 16px 0 var(--coral); }
.hero-image img { width:100%; height:auto; }

/* ============ 按钮 ============ */
.btn {
  display:inline-flex; align-items:center; gap:9px;
  padding:14px 30px; border-radius:99px;
  font-weight:800; font-size:0.95rem; letter-spacing:.3px;
  cursor:pointer; border:var(--bd); text-decoration:none;
  box-shadow:4px 4px 0 var(--ink);
  transition:transform .18s cubic-bezier(.34,1.56,.64,1), box-shadow .18s ease, background .2s ease;
}
.btn:hover{ transform:translate(-2px,-2px); box-shadow:7px 7px 0 var(--ink); }
.btn:active{ transform:translate(2px,2px); box-shadow:1px 1px 0 var(--ink); }

.btn-primary { color:#fff; background:var(--coral); }
.btn-primary:hover{ background:var(--violet); }

.btn-outline { background:#fff; color:var(--ink); border-color:var(--ink); }
.btn-outline:hover{ background:var(--lime); }

/* ============ 标签 / 标题 ============ */
.section-label {
  display:inline-block; font-size:0.76rem; font-weight:900;
  letter-spacing:3px; text-transform:uppercase;
  margin-bottom:16px; padding:5px 16px; border-radius:99px;
  background:var(--lime); border:var(--bd); color:var(--ink);
  box-shadow:var(--shadow-s); transform:rotate(-1.5deg);
}

.section-title {
  font-size:clamp(1.7rem, 3.2vw, 2.5rem);
  font-weight:900; letter-spacing:-1px; line-height:1.15;
  margin-bottom:16px; color:var(--ink);
}

.section-desc {
  max-width:600px; color:var(--ink-soft);
  font-size:1rem; line-height:1.85; margin-bottom:44px;
}

/* ============ 卡片网格 ============ */
.cards-grid {
  display:grid;
  grid-template-columns:repeat(auto-fill, minmax(260px, 1fr));
  gap:26px;
}

.category-card {
  border-radius:var(--r-md); padding:30px 26px;
  background:#fff; border:var(--bd);
  box-shadow:var(--shadow-m);
  position:relative; overflow:hidden;
  transition:transform .25s cubic-bezier(.34,1.4,.64,1), box-shadow .25s ease, background .25s ease;
}
.category-card::before{
  content:''; position:absolute; top:-40px; right:-40px;
  width:100px; height:100px; border-radius:50%;
  background:var(--lilac); opacity:0; transition:opacity .3s ease;
}
.category-card:hover {
  transform:translate(-4px,-4px);
  box-shadow:var(--shadow-l);
  background:#FFFDF7;
}
.category-card:hover::before{ opacity:1; }

.card-icon {
  width:52px; height:52px; border-radius:15px;
  display:flex; align-items:center; justify-content:center;
  margin-bottom:18px; font-size:1.35rem;
  background:var(--lime); border:var(--bd);
  box-shadow:var(--shadow-s);
  transition:transform .3s cubic-bezier(.34,1.56,.64,1);
}
.category-card:hover .card-icon{ transform:rotate(-8deg) scale(1.06); }
.category-card:nth-child(2) .card-icon{ background:var(--sky); }
.category-card:nth-child(3) .card-icon{ background:var(--mango); }
.category-card:nth-child(4) .card-icon{ background:var(--lilac-2); }
.category-card:nth-child(5) .card-icon{ background:#FFC9D4; }
.category-card:nth-child(6) .card-icon{ background:var(--lime); }

.category-card h3{
  font-size:1.12rem; font-weight:900; letter-spacing:-.3px;
  margin-bottom:10px; position:relative; z-index:1;
}
.category-card p{
  font-size:0.92rem; color:var(--ink-soft); line-height:1.8;
  margin-bottom:18px; position:relative; z-index:1;
}

.card-link {
  font-weight:900; font-size:0.84rem;
  text-decoration:none; color:var(--coral);
  display:inline-flex; align-items:center; gap:6px;
  position:relative; z-index:1;
}
.card-link::after{ content:'→'; transition:transform .25s ease; }
.card-link:hover::after{ transform:translateX(5px); }

/* ============ 特性块 ============ */
.feature-block {
  display:grid; grid-template-columns:1fr 1fr;
  gap:56px; align-items:center;
}

.feature-image {
  border-radius:var(--r-md); overflow:hidden;
  border:var(--bd); background:#fff;
  box-shadow:-10px 10px 0 var(--lime);
  transition:box-shadow .35s ease, transform .35s cubic-bezier(.34,1.4,.64,1);
}
.feature-image:hover{ box-shadow:-14px 14px 0 var(--violet); transform:translateY(-4px); }
.feature-image img { width:100%; height:auto; }

.feature-text h3{
  font-size:1.6rem; font-weight:900; letter-spacing:-.8px;
  line-height:1.2; margin-bottom:14px;
}
.feature-text p{ color:var(--ink-soft); line-height:1.85; margin-bottom:20px; }

.feature-list { list-style:none; }
.feature-list li {
  padding:7px 0; display:flex; align-items:center; gap:12px;
  font-size:0.95rem; font-weight:600; color:var(--ink);
}
.feature-list li::before {
  content:'✓'; font-weight:900; font-size:0.7rem;
  width:23px; height:23px; flex:0 0 23px;
  display:grid; place-items:center;
  border-radius:50%; background:var(--lime);
  border:2px solid var(--ink); color:var(--ink);
}

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

.stat-item {
  padding:28px 18px; border-radius:var(--r-md);
  background:#fff; border:var(--bd);
  box-shadow:var(--shadow-m);
  transition:transform .25s cubic-bezier(.34,1.4,.64,1), box-shadow .25s ease;
}
.stat-item:nth-child(1){ background:var(--lime); }
.stat-item:nth-child(2){ background:#FFE1E8; }
.stat-item:nth-child(3){ background:var(--lilac-2); }
.stat-item:nth-child(4){ background:#DDF3FF; }
.stat-item:hover{ transform:translate(-4px,-4px); box-shadow:var(--shadow-l); }

.stat-number {
  font-size:2.4rem; font-weight:900; letter-spacing:-1.5px;
  line-height:1; color:var(--ink);
}
.stat-item:nth-child(2) .stat-number{ color:var(--coral); }
.stat-item:nth-child(3) .stat-number{ color:var(--violet); }

.stat-label {
  font-size:0.86rem; font-weight:700; color:var(--ink-soft);
  margin-top:10px; letter-spacing:.5px;
}

/* ============ 内容墙 ============ */
.content-wall {
  display:grid;
  grid-template-columns:repeat(auto-fill, minmax(280px, 1fr));
  gap:26px;
}

.content-wall-item {
  border-radius:var(--r-md); overflow:hidden;
  background:#fff; border:var(--bd);
  box-shadow:var(--shadow-m);
  transition:transform .28s cubic-bezier(.34,1.4,.64,1), box-shadow .28s ease;
}
.content-wall-item:nth-child(even){ transform:rotate(.6deg); }
.content-wall-item:hover {
  transform:translate(-4px,-6px) rotate(-1deg);
  box-shadow:var(--shadow-l);
}
.content-wall-item img {
  width:100%; height:200px; object-fit:cover;
  border-bottom:var(--bd);
}
.content-wall-body { padding:22px; }
.content-wall-body h3{
  font-size:1.05rem; font-weight:900; letter-spacing:-.3px;
  margin-bottom:8px;
}
.content-wall-body p{
  font-size:0.9rem; color:var(--ink-soft); line-height:1.75;
}

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

.faq-item {
  background:#fff; border:var(--bd); border-radius:var(--r-sm);
  margin-bottom:12px; overflow:hidden; cursor:pointer;
  box-shadow:var(--shadow-s);
  transition:transform .2s ease, box-shadow .2s ease, background .25s ease;
}
.faq-item:hover{ transform:translate(-2px,-2px); box-shadow:5px 5px 0 var(--ink); }

.faq-item .faq-question {
  padding:18px 22px; font-weight:800; font-size:1rem;
  display:flex; justify-content:space-between; align-items:center;
  gap:16px; color:var(--ink);
  transition:color .2s ease, background .25s ease;
}
.faq-item .faq-answer {
  padding:0 22px 20px; display:none;
  color:var(--ink-soft); font-size:0.94rem; line-height:1.85;
}
.faq-item.open {
  background:linear-gradient(180deg, #FFFDF5, var(--lilac));
  box-shadow:6px 6px 0 var(--violet);
}
.faq-item.open .faq-question{ color:var(--coral); }
.faq-item.open .faq-answer { display:block; }

/* ============ CTA 横幅 ============ */
.cta-banner {
  padding:64px 32px; text-align:center;
  border-radius:var(--r-lg); color:#fff;
  background:linear-gradient(125deg, var(--coral) 0%, var(--violet) 55%, var(--sky) 120%);
  border:var(--bd);
  box-shadow:12px 12px 0 var(--ink);
  position:relative; overflow:hidden;
}
.cta-banner::before{
  content:''; position:absolute; inset:0;
  background-image:radial-gradient(rgba(255,255,255,.35) 1.6px, transparent 1.6px);
  background-size:22px 22px; opacity:.5;
}
.cta-banner h2 {
  color:#fff; position:relative; z-index:1;
  font-size:clamp(1.6rem, 3.4vw, 2.4rem);
  font-weight:900; letter-spacing:-1px; line-height:1.2;
  margin-bottom:14px;
}
.cta-banner p{
  position:relative; z-index:1;
  max-width:520px; margin:0 auto 30px;
  color:rgba(255,255,255,.92); line-height:1.8;
}
.cta-banner .btn-primary {
  background:#fff; color:var(--ink);
  position:relative; z-index:1;
  box-shadow:4px 4px 0 var(--ink);
}
.cta-banner .btn-primary:hover{ background:var(--lime); }

/* ============ 页脚 ============ */
.site-footer {
  padding:64px 0 28px;
  background:var(--lilac);
  border-top:var(--bd);
  color:var(--ink);
}
.site-footer .container { position:relative; z-index:1; }

.footer-grid {
  display:grid; grid-template-columns:2fr 1fr 1fr 1fr;
  gap:44px;
}

.footer-brand{ max-width:340px; }
.footer-brand p{
  margin-top:16px; font-size:0.9rem;
  color:var(--ink-soft); line-height:1.85;
}
.footer-brand .logo{ margin-bottom:4px; }

.footer-col h4{
  font-size:0.95rem; font-weight:900; letter-spacing:.5px;
  margin-bottom:18px; color:var(--ink);
}
.footer-col ul{ list-style:none; }
.footer-col li{ margin-bottom:10px; }
.footer-col a{
  text-decoration:none; font-size:0.9rem;
  color:var(--ink-soft); transition:color .2s ease, padding-left .2s ease;
}
.footer-col a:hover{ color:var(--coral); padding-left:5px; }

.footer-bottom {
  border-top:2px solid rgba(24,18,51,0.12);
  margin-top:44px; padding-top:22px;
  text-align:center; font-size:0.85rem;
  color:var(--ink-soft); font-weight:600;
}

/* ============ 工具类 ============ */
.text-accent{
  color:var(--coral); font-weight:900;
  background:linear-gradient(transparent 62%, var(--lime) 62%);
  padding:0 3px;
}
.text-center { text-align:center; }
.text-center .section-desc{ margin-left:auto; margin-right:auto; }

.seo-description {
  max-width:600px; margin:0 auto 48px;
  color:var(--ink-soft); line-height:1.9;
}

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

/* ============ 响应式 ============ */
@media (max-width: 980px){
  .hero{ padding:130px 0 70px; }
  .footer-grid{ grid-template-columns:1.4fr 1fr 1fr; }
  .footer-brand{ grid-column:1 / -1; max-width:none; }
}

@media (max-width: 768px) {
  .section{ padding:60px 0; }
  .feature-block { grid-template-columns:1fr; gap:36px; }
  .feature-image{ box-shadow:-6px 6px 0 var(--lime); }
  .stats-bar { grid-template-columns:repeat(2,1fr); }
  .footer-grid { grid-template-columns:1fr 1fr; gap:32px; }
  .hero{ min-height:auto; }
  .hero::before{ width:280px; height:280px; right:-120px; }

  .main-nav { display:none; }
  .menu-toggle { display:flex; }

  .main-nav.open {
    display:flex; flex-direction:column; align-items:flex-start;
    gap:16px; position:absolute; top:68px; left:0; width:100%;
    background:var(--cream); padding:24px;
    border-bottom:var(--bd);
    box-shadow:0 10px 0 rgba(24,18,51,0.08);
  }
  .main-nav.open a{ font-size:1rem; }
  .main-nav.open .nav-cta{ align-self:stretch; text-align:center; justify-content:center; display:flex; }
}

@media (max-width: 480px) {
  .container{ padding:0 18px; }
  .cards-grid, .content-wall, .stats-bar { grid-template-columns:1fr; }
  .footer-grid { grid-template-columns:1fr; }
  .hero-buttons { flex-direction:column; align-items:stretch; }
  .hero-buttons .btn{ justify-content:center; }
  .hero h1{ letter-spacing:-1px; }
  .cta-banner{ padding:48px 20px; box-shadow:8px 8px 0 var(--ink); }
  .content-wall-item:nth-child(even){ transform:none; }
}