/* ============================================================
   黑料反差 · DESIGN SYSTEM
   Style: Neo-Brutalist Editorial / Acid Cream
   Palette: Cream paper + Acid Lime + Tangerine + Deep Plum ink
   ============================================================ */

:root{
  --ink:#1E1030;
  --ink-soft:#544469;
  --cream:#F7F3E8;
  --cream-deep:#EFE7D6;
  --lilac-wash:#ECE4FA;
  --paper:#FFFFFF;
  --lime:#C6FF3D;
  --lime-deep:#7FA800;
  --tangerine:#FF5B2E;
  --violet:#6D3BFF;
  --lilac:#E3D8FF;
  --shadow-sm:3px 3px 0 var(--ink);
  --shadow-md:6px 6px 0 var(--ink);
  --shadow-lg:10px 10px 0 var(--ink);
  --radius:14px;
  --ease:cubic-bezier(.2,.8,.25,1);
}

/* 基础重置 */
*, *::before, *::after { margin:0; padding:0; box-sizing:border-box; }
body { font-family: system-ui, 'PingFang SC', 'Microsoft YaHei', sans-serif; overflow-x:hidden; }

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

body{
  background-color:var(--cream);
  background-image:radial-gradient(rgba(30,16,48,.07) 1.2px, transparent 1.2px);
  background-size:22px 22px;
  color:var(--ink);
  line-height:1.75;
  font-weight:400;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}

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

h1,h2,h3,h4,h5{ line-height:1.15; letter-spacing:-.025em; font-weight:900; }
a{ color:inherit; }
img{ max-width:100%; display:block; }

/* 滚动条 */
::-webkit-scrollbar{ width:11px; height:11px; }
::-webkit-scrollbar-track{ background:var(--cream-deep); }
::-webkit-scrollbar-thumb{ background:var(--ink); border:2px solid var(--cream-deep); border-radius:99px; }
::-webkit-scrollbar-thumb:hover{ background:var(--tangerine); }

/* 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:var(--lilac-wash); }
.section:nth-child(even)::before{
  content:'';
  position:absolute; inset:0;
  background-image:linear-gradient(rgba(30,16,48,.045) 1px, transparent 1px),
                   linear-gradient(90deg, rgba(30,16,48,.045) 1px, transparent 1px);
  background-size:64px 64px;
  pointer-events:none;
}
.section > .container{ position:relative; z-index:2; }

/* 导航 — 固定顶部 */
.site-header {
  position:fixed; top:0; left:0; width:100%; z-index:1000;
  background:rgba(247,243,232,.88);
  backdrop-filter:blur(14px) saturate(160%);
  -webkit-backdrop-filter:blur(14px) saturate(160%);
  border-bottom:2px solid var(--ink);
}
.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:1.15rem; text-decoration:none; color:var(--ink);
  letter-spacing:-.04em;
}
.logo-icon {
  width:36px; height:36px; border-radius:10px;
  display:flex; align-items:center; justify-content:center; font-size:1rem;
  background:var(--lime);
  border:2px solid var(--ink);
  box-shadow:var(--shadow-sm);
  transform:rotate(-6deg);
  transition:transform .35s var(--ease), background .2s;
  font-weight:900;
}
.logo:hover .logo-icon{ transform:rotate(6deg) scale(1.06); background:var(--tangerine); color:#fff; }

.main-nav { display:flex; align-items:center; gap:26px; list-style:none; }
.main-nav a {
  text-decoration:none; font-size:.9rem; font-weight:600; transition:.2s;
  color:var(--ink); position:relative; padding-bottom:3px;
}
.main-nav a::after{
  content:''; position:absolute; left:0; bottom:0; height:2px; width:100%;
  background:var(--tangerine);
  transform:scaleX(0); transform-origin:left;
  transition:transform .3s var(--ease);
}
.main-nav a:hover{ color:var(--tangerine); }
.main-nav a:hover::after{ transform:scaleX(1); }

.nav-cta {
  padding:9px 22px; border-radius:8px; color:#fff!important; font-weight:700;
  background:var(--tangerine);
  border:2px solid var(--ink);
  box-shadow:var(--shadow-sm);
  transition:transform .15s var(--ease), box-shadow .15s var(--ease);
}
.nav-cta::after{ display:none; }
.nav-cta:hover{
  transform:translate(3px,3px);
  box-shadow:0 0 0 var(--ink);
  color:var(--ink)!important;
  background:var(--lime);
}

.menu-toggle {
  display:none; align-items:center; justify-content:center;
  width:42px; height:42px; border-radius:10px;
  background:var(--lime); border:2px solid var(--ink);
  box-shadow:var(--shadow-sm); cursor:pointer;
  font-size:1rem; font-weight:900; color:var(--ink);
}

/* 首页 Hero */
.hero {
  min-height:70vh; display:flex; align-items:center;
  padding:132px 0 88px; position:relative; overflow:hidden;
}
.hero::before{
  content:''; position:absolute; top:110px; right:-90px;
  width:360px; height:360px; border-radius:50%;
  background:var(--lime); border:2px solid var(--ink); z-index:0;
  animation:floaty 9s ease-in-out infinite;
}
.hero::after{
  content:''; position:absolute; bottom:-70px; left:-70px;
  width:220px; height:220px;
  background:var(--lilac); border:2px solid var(--ink);
  border-radius:38% 62% 55% 45% / 48% 42% 58% 52%;
  z-index:0;
  animation:floaty 12s ease-in-out infinite reverse;
}
@keyframes floaty{
  0%,100%{ transform:translate(0,0) rotate(0deg); }
  50%{ transform:translate(-16px,22px) rotate(9deg); }
}

.hero-content { max-width:720px; position:relative; z-index:3; }
.hero-content::before{
  content:''; position:absolute; top:-26px; left:-22px;
  width:86px; height:14px; background:var(--tangerine);
  border:2px solid var(--ink); z-index:-1; transform:rotate(-4deg);
}
.hero-eyebrow {
  display:inline-flex; align-items:center; gap:8px;
  font-size:.8rem; font-weight:800; padding:6px 16px; border-radius:99px;
  margin-bottom:20px;
  background:var(--lime); color:var(--ink);
  border:2px solid var(--ink); box-shadow:var(--shadow-sm);
  letter-spacing:.14em; text-transform:uppercase;
}
.hero h1 {
  font-size:clamp(2.3rem, 5.4vw, 4.1rem);
  line-height:1.08; margin-bottom:24px;
  letter-spacing:-.045em; font-weight:900;
}
.hero p {
  font-size:1.08rem; color:var(--ink-soft); max-width:560px; margin-bottom:34px;
  font-weight:450;
}
.hero-buttons { display:flex; gap:14px; flex-wrap:wrap; }
.hero-image {
  border-radius:var(--radius); overflow:hidden;
  border:2px solid var(--ink); box-shadow:var(--shadow-lg);
  transform:rotate(-1.5deg); position:relative; z-index:2;
  transition:transform .4s var(--ease);
}
.hero-image:hover{ transform:rotate(0deg) translateY(-6px); }
.hero-image img { width:100%; height:auto; }

/* 按钮 */
.btn {
  display:inline-flex; align-items:center; gap:8px;
  padding:14px 30px; border-radius:10px;
  font-weight:800; font-size:.95rem; letter-spacing:.02em;
  cursor:pointer; border:2px solid var(--ink); text-decoration:none;
  transition:transform .15s var(--ease), box-shadow .15s var(--ease), background .2s, color .2s;
  box-shadow:5px 5px 0 var(--ink);
}
.btn:hover{ transform:translate(5px,5px); box-shadow:0 0 0 var(--ink); }
.btn-primary { color:var(--ink); background:var(--lime); }
.btn-primary:hover{ background:var(--tangerine); color:#fff; }
.btn-outline { background:var(--paper); border:2px solid var(--ink); color:var(--ink); }
.btn-outline:hover{ background:var(--ink); color:var(--lime); }

/* 标签 / 标题 */
.section-label {
  display:inline-flex; align-items:center; gap:10px;
  font-size:.76rem; font-weight:800; letter-spacing:.32em;
  margin-bottom:16px; color:var(--tangerine); text-transform:uppercase;
}
.section-label::before{
  content:''; width:26px; height:3px; background:var(--tangerine); display:inline-block;
}
.section-title {
  font-size:clamp(1.7rem, 3.4vw, 2.7rem);
  margin-bottom:16px; letter-spacing:-.035em;
}
.section-title::after{
  content:''; display:block; width:64px; height:10px;
  background:var(--lime); border:2px solid var(--ink);
  margin-top:18px; transform:rotate(-1.5deg);
}
.text-center .section-title::after{ margin-left:auto; margin-right:auto; }
.section-desc { max-width:600px; color:var(--ink-soft); margin-bottom:44px; font-size:1.02rem; }

/* 卡片网格 */
.cards-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(260px,1fr)); gap:26px; }
.category-card {
  border-radius:var(--radius); padding:30px 28px;
  border:2px solid var(--ink); background:var(--paper);
  box-shadow:var(--shadow-md);
  transition:transform .22s var(--ease), box-shadow .22s var(--ease);
  position:relative; overflow:hidden;
}
.category-card::after{
  content:''; position:absolute; top:0; right:0;
  width:0; height:0; border-style:solid;
  border-width:0 46px 46px 0;
  border-color:transparent var(--lime) transparent transparent;
  transition:border-color .25s;
}
.category-card:hover {
  transform:translate(-4px,-4px);
  box-shadow:var(--shadow-lg);
}
.category-card:hover::after{ border-color:transparent var(--tangerine) transparent transparent; }

.card-icon {
  width:50px; height:50px; border-radius:12px;
  display:flex; align-items:center; justify-content:center;
  margin-bottom:18px; font-size:1.3rem;
  background:var(--lilac); border:2px solid var(--ink);
  box-shadow:var(--shadow-sm); transform:rotate(-4deg);
}
.category-card:nth-child(3n+1) .card-icon{ background:var(--lime); }
.category-card:nth-child(3n+2) .card-icon{ background:var(--tangerine); color:#fff; }
.category-card:nth-child(3n) .card-icon{ background:var(--lilac); }

.category-card h3{ font-size:1.15rem; margin-bottom:10px; letter-spacing:-.02em; }
.category-card p{ font-size:.92rem; color:var(--ink-soft); margin-bottom:18px; }

.card-link {
  font-weight:800; font-size:.82rem; text-decoration:none;
  color:var(--ink); letter-spacing:.06em;
  border-bottom:2px solid var(--tangerine);
  padding-bottom:2px;
  display:inline-block; transition:.2s;
}
.card-link:hover{ color:var(--tangerine); transform:translateX(4px); }

/* 特性块 */
.feature-block { display:grid; grid-template-columns:1fr 1fr; gap:56px; align-items:center; }
.feature-image {
  border-radius:var(--radius); overflow:hidden;
  border:2px solid var(--ink); box-shadow:var(--shadow-lg);
  transform:rotate(1.2deg); transition:transform .4s var(--ease);
}
.feature-image:hover{ transform:rotate(0deg) translateY(-6px); }
.feature-image img { width:100%; height:auto; }
.feature-text { }
.feature-text h3{ font-size:1.6rem; margin-bottom:16px; letter-spacing:-.03em; }
.feature-text p{ color:var(--ink-soft); margin-bottom:22px; }

.feature-list { list-style:none; }
.feature-list li {
  padding:9px 0; display:flex; align-items:center; gap:12px;
  font-weight:600; font-size:.96rem;
}
.feature-list li::before {
  content:'✓'; font-weight:900; font-size:.78rem;
  width:24px; height:24px; flex:0 0 24px;
  display:inline-flex; align-items:center; justify-content:center;
  background:var(--lime); color:var(--ink);
  border:2px solid var(--ink); border-radius:7px;
  box-shadow:2px 2px 0 var(--ink);
  transform:rotate(-3deg);
}

/* 数据条 */
.stats-bar { display:grid; grid-template-columns:repeat(4,1fr); gap:24px; text-align:center; }
.stat-item {
  padding:30px 20px; border-radius:var(--radius);
  border:2px solid var(--ink); background:var(--paper);
  box-shadow:var(--shadow-md);
  transition:transform .22s var(--ease), box-shadow .22s var(--ease), background .3s;
}
.stat-item:hover{
  transform:translateY(-6px) rotate(-1deg);
  box-shadow:var(--shadow-lg);
  background:var(--lime);
}
.stat-number {
  font-size:clamp(2rem, 3.6vw, 2.9rem); font-weight:900;
  letter-spacing:-.05em; line-height:1; color:var(--ink);
}
.stat-item:nth-child(1) .stat-number{ color:var(--tangerine); }
.stat-item:nth-child(2) .stat-number{ color:var(--violet); }
.stat-item:nth-child(3) .stat-number{ color:var(--lime-deep); }
.stat-item:nth-child(4) .stat-number{ color:var(--ink); }
.stat-item:hover .stat-number{ color:var(--ink); }
.stat-label { font-size:.88rem; color:var(--ink-soft); margin-top:10px; font-weight:600; letter-spacing:.05em; }

/* 内容墙 */
.content-wall { display:grid; grid-template-columns:repeat(auto-fill,minmax(280px,1fr)); gap:26px; }
.content-wall-item {
  border-radius:var(--radius); overflow:hidden;
  border:2px solid var(--ink); background:var(--paper);
  box-shadow:var(--shadow-md);
  transition:transform .22s var(--ease), box-shadow .22s var(--ease);
}
.content-wall-item:hover {
  transform:translate(-4px,-4px) rotate(-.6deg);
  box-shadow:var(--shadow-lg);
}
.content-wall-item img {
  width:100%; height:200px; object-fit:cover;
  border-bottom:2px solid var(--ink);
  filter:saturate(1.08) contrast(1.04);
  transition:transform .5s var(--ease);
}
.content-wall-item:hover img{ transform:scale(1.05); }
.content-wall-body { padding:22px; }
.content-wall-body h3{ font-size:1.08rem; margin-bottom:8px; letter-spacing:-.02em; }
.content-wall-body p{ font-size:.9rem; color:var(--ink-soft); }

/* FAQ */
.faq-list { max-width:800px; margin:0 auto; }
.faq-item {
  border:2px solid var(--ink); border-radius:12px;
  margin-bottom:12px; overflow:hidden; cursor:pointer;
  background:var(--paper); box-shadow:4px 4px 0 var(--ink);
  transition:transform .2s var(--ease), box-shadow .2s var(--ease), background .25s;
}
.faq-item:hover{ transform:translate(-2px,-2px); box-shadow:6px 6px 0 var(--ink); }
.faq-item.open{ background:var(--cream); box-shadow:var(--shadow-md); }
.faq-item .faq-question {
  padding:18px 22px; font-weight:800; font-size:1rem;
  display:flex; justify-content:space-between; align-items:center; gap:16px;
  letter-spacing:-.01em;
}
.faq-item .faq-question::after{
  content:'+'; font-size:1.4rem; font-weight:900; line-height:1;
  width:30px; height:30px; flex:0 0 30px;
  display:inline-flex; align-items:center; justify-content:center;
  background:var(--lime); border:2px solid var(--ink); border-radius:8px;
  transition:transform .3s var(--ease), background .25s;
}
.faq-item.open .faq-question::after{
  content:'−'; background:var(--tangerine); color:#fff; transform:rotate(180deg);
}
.faq-item .faq-answer { padding:0 22px 18px; display:none; color:var(--ink-soft); font-size:.95rem; }
.faq-item.open .faq-answer { display:block; animation:fadeUp .35s var(--ease); }
@keyframes fadeUp{ from{ opacity:0; transform:translateY(-6px); } to{ opacity:1; transform:translateY(0); } }

/* CTA横幅 */
.cta-banner {
  padding:64px 32px; text-align:center; border-radius:18px;
  color:var(--ink);
  background:linear-gradient(115deg, var(--lime) 0%, var(--lime) 38%, var(--tangerine) 100%);
  border:2px solid var(--ink);
  box-shadow:var(--shadow-lg);
  position:relative; overflow:hidden;
}
.cta-banner::before{
  content:''; position:absolute; top:-60px; left:-40px;
  width:200px; height:200px; border-radius:50%;
  border:2px solid var(--ink); background:rgba(255,255,255,.35);
}
.cta-banner::after{
  content:''; position:absolute; bottom:-80px; right:-50px;
  width:240px; height:240px;
  border:2px solid var(--ink); background:rgba(30,16,48,.10);
  border-radius:38% 62% 55% 45% / 48% 42% 58% 52%;
}
.cta-banner > *{ position:relative; z-index:2; }
.cta-banner h2 { color:var(--ink); font-size:clamp(1.6rem,3vw,2.4rem); margin-bottom:14px; letter-spacing:-.035em; }
.cta-banner p{ color:rgba(30,16,48,.78); max-width:520px; margin:0 auto 28px; font-weight:500; }
.cta-banner .btn-primary { background:var(--ink); color:var(--lime); box-shadow:5px 5px 0 rgba(255,255,255,.85); }
.cta-banner .btn-primary:hover{ background:var(--paper); color:var(--ink); box-shadow:0 0 0 rgba(255,255,255,.85); transform:translate(5px,5px); }

/* 页脚 */
.site-footer { padding:56px 0 28px; background:var(--cream-deep); border-top:2px solid var(--ink); position:relative; }
.site-footer::before{
  content:''; position:absolute; top:0; left:0; width:100%; height:8px;
  background:repeating-linear-gradient(90deg, var(--ink) 0 22px, var(--lime) 22px 44px, var(--tangerine) 44px 66px, var(--lilac) 66px 88px);
}
.site-footer .container { }
.footer-grid { display:grid; grid-template-columns:2fr 1fr 1fr 1fr; gap:40px; }
.footer-brand { }
.footer-brand p{ color:var(--ink-soft); font-size:.92rem; max-width:320px; margin-top:14px; }
.footer-col { }
.footer-col h4{
  font-size:.78rem; letter-spacing:.24em; text-transform:uppercase;
  color:var(--tangerine); margin-bottom:16px; font-weight:800;
}
.footer-col ul{ list-style:none; }
.footer-col li{ margin-bottom:10px; }
.footer-col a{ text-decoration:none; font-size:.9rem; color:var(--ink-soft); transition:.2s; }
.footer-col a:hover{ color:var(--ink); padding-left:5px; }
.footer-bottom {
  border-top:1px solid rgba(30,16,48,.16);
  margin-top:44px; padding-top:22px; text-align:center;
  font-size:.84rem; color:var(--ink-soft); letter-spacing:.03em;
}

/* 工具类 */
.text-accent { color:var(--tangerine); font-weight:800; }
.text-center { text-align:center; }
.seo-description { max-width:600px; margin:0 auto 48px; color:var(--ink-soft); }
.mt-0 { margin-top:0; }
.mb-0 { margin-bottom:0; }

/* 追加通用排版微调 */
.section p strong{ font-weight:800; }
h2 + p, h3 + p{ margin-top:2px; }

/* ⚠️ 响应式 */
@media (max-width: 1024px){
  .hero::before{ width:260px; height:260px; right:-120px; }
  .footer-grid { grid-template-columns:1.6fr 1fr 1fr; }
}

@media (max-width: 768px) {
  .section{ padding:64px 0; }
  .feature-block { grid-template-columns:1fr; gap:34px; }
  .stats-bar { grid-template-columns:repeat(2,1fr); }
  .footer-grid { grid-template-columns:1fr 1fr; gap:32px; }
  .main-nav { display:none; }
  .menu-toggle { display:flex; }
  .main-nav.open {
    display:flex; flex-direction:column; align-items:flex-start;
    position:absolute; top:68px; left:0; width:100%;
    background:var(--cream); padding:24px;
    border-bottom:2px solid var(--ink); gap:18px;
    box-shadow:0 12px 0 rgba(30,16,48,.08);
  }
  .main-nav.open .nav-cta{ width:100%; justify-content:center; }
  .hero{ padding:118px 0 68px; }
  .hero-content::before{ display:none; }
  .hero::after{ width:150px; height:150px; bottom:-50px; left:-50px; }
}

@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-buttons .btn{ width:100%; justify-content:center; }
  .hero h1{ font-size:2.1rem; }
  .cta-banner{ padding:48px 22px; border-radius:14px; }
  .cta-banner .btn-primary{ width:100%; justify-content:center; }
}

@media (prefers-reduced-motion: reduce){
  *{ animation:none!important; transition-duration:.01ms!important; }
}