/* ============================================================
   DESIGN SYSTEM — "SOFT BRUTALIST / WARM FLUID"
   Palette: Cream · Coral · Teal · Lilac · Sun
   ============================================================ */

:root{
  --cream:#FFF8EF;
  --cream-2:#FDF1E3;
  --paper:#FFFFFF;
  --ink:#221D1A;
  --ink-soft:#6B615A;
  --coral:#FF6A4D;
  --coral-deep:#E84A2C;
  --teal:#12A594;
  --lilac:#B9A7FF;
  --sun:#FFD166;
  --line:rgba(34,29,26,.14);
  --shadow:6px 6px 0 rgba(34,29,26,.9);
  --shadow-soft:0 14px 40px -18px rgba(34,29,26,.28);
  --radius:20px;
  --radius-sm:12px;
}

/* 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:var(--cream);
  color:var(--ink);
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}

/* 背景光斑 */
body::before{
  content:"";
  position:fixed;
  inset:-20%;
  z-index:-1;
  pointer-events:none;
  background:
    radial-gradient(38vw 38vw at 8% 12%, rgba(255,106,77,.16), transparent 62%),
    radial-gradient(34vw 34vw at 92% 6%, rgba(185,167,255,.20), transparent 64%),
    radial-gradient(42vw 42vw at 78% 88%, rgba(18,165,148,.14), transparent 66%),
    radial-gradient(30vw 30vw at 22% 96%, rgba(255,209,102,.18), transparent 62%);
}

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

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

/* 核心布局 — 必须居中 */
.container { max-width:1200px; margin:0 auto; padding:0 24px; }
.section { padding:80px 0; position:relative; }
.section:nth-child(even) { background:rgba(255,255,255,.62); }

/* 导航 — 固定顶部 */
.site-header {
  position:fixed; top:0; left:0; width:100%; z-index:1000;
  background:rgba(255,248,239,.82);
  backdrop-filter:blur(14px) saturate(160%);
  -webkit-backdrop-filter:blur(14px) saturate(160%);
  border-bottom:1px solid var(--line);
}
.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:8px;
  font-weight:800; font-size:1.2rem; letter-spacing:-.02em;
  text-decoration:none; color:inherit;
}
.logo-icon {
  width:36px; height:36px; border-radius:11px;
  display:flex; align-items:center; justify-content:center;
  font-size:1rem; color:#fff;
  background:linear-gradient(135deg,var(--coral) 0%,var(--coral-deep) 55%,var(--lilac) 130%);
  box-shadow:3px 3px 0 var(--ink);
  transform:rotate(-4deg);
  transition:transform .35s cubic-bezier(.2,.8,.2,1);
}
.logo:hover .logo-icon{ transform:rotate(6deg) scale(1.06); }

.main-nav { display:flex; align-items:center; gap:24px; list-style:none; }
.main-nav a {
  text-decoration:none; font-size:.9rem; font-weight:600;
  transition:0.2s; position:relative; padding:4px 0; color:var(--ink);
}
.main-nav a::after{
  content:""; position:absolute; left:0; bottom:-2px;
  width:0; height:2px; background:var(--coral);
  transition:width .3s cubic-bezier(.2,.8,.2,1);
}
.main-nav a:hover::after{ width:100%; }
.main-nav a:hover{ color:var(--coral-deep); }

.nav-cta {
  padding:8px 20px; border-radius:999px; color:#fff!important; font-weight:700;
  background:var(--ink);
  box-shadow:3px 3px 0 var(--coral);
  transition:transform .2s, box-shadow .2s;
}
.nav-cta::after{ display:none; }
.nav-cta:hover{ transform:translate(-1px,-2px); box-shadow:5px 5px 0 var(--coral); color:#fff!important; }

.menu-toggle {
  display:none; width:42px; height:42px; border-radius:12px;
  align-items:center; justify-content:center;
  background:var(--paper); border:1.5px solid var(--line);
  cursor:pointer; font-size:1.1rem; color:var(--ink);
}

/* 首页Hero */
.hero {
  min-height:70vh; display:flex; align-items:center;
  position:relative; padding:150px 0 96px;
  overflow:hidden;
}
.hero::after{
  content:"";
  position:absolute; right:-120px; top:50%;
  width:520px; height:520px; border-radius:50%;
  background:conic-gradient(from 200deg, rgba(255,106,77,.30), rgba(185,167,255,.34), rgba(18,165,148,.28), rgba(255,209,102,.30), rgba(255,106,77,.30));
  filter:blur(30px); transform:translateY(-50%);
  animation:spinSlow 26s linear infinite;
  z-index:0;
}
@keyframes spinSlow{ to{ transform:translateY(-50%) rotate(360deg); } }

.hero-content { max-width:720px; position:relative; z-index:2; }
.hero-eyebrow {
  display:inline-block; font-size:.85rem; font-weight:700;
  padding:5px 16px; border-radius:999px; margin-bottom:20px;
  letter-spacing:.08em;
  background:var(--sun); color:var(--ink);
  border:1.5px solid var(--ink);
  box-shadow:3px 3px 0 var(--ink);
  transform:rotate(-1.5deg);
}
.hero h1 {
  font-size:clamp(2.1rem,5.6vw,3.6rem);
  line-height:1.12; margin-bottom:20px;
  font-weight:900; letter-spacing:-.035em;
  background:linear-gradient(100deg,var(--ink) 0%,var(--ink) 48%,var(--coral-deep) 68%,var(--teal) 100%);
  -webkit-background-clip:text; background-clip:text;
  -webkit-text-fill-color:transparent;
}
.hero p {
  font-size:1.1rem; opacity:.72; max-width:560px; margin-bottom:32px;
  color:var(--ink-soft);
}
.hero-buttons { display:flex; gap:14px; flex-wrap:wrap; }

.hero-image {
  border-radius:var(--radius); overflow:hidden;
  border:1.5px solid var(--ink);
  box-shadow:var(--shadow);
  background:linear-gradient(140deg,#FFE9DF,#EDE6FF 55%,#DDF5F1);
  position:relative; z-index:2;
}
.hero-image img { width:100%; height:auto; }

/* 按钮 */
.btn {
  display:inline-flex; align-items:center; gap:8px;
  padding:13px 28px; border-radius:999px;
  font-weight:800; cursor:pointer; border:none;
  text-decoration:none; transition:.22s cubic-bezier(.2,.8,.2,1);
  font-size:.95rem; letter-spacing:.01em;
  position:relative;
}
.btn-primary {
  color:#fff;
  background:var(--coral);
  box-shadow:4px 4px 0 var(--ink);
}
.btn-primary:hover{ transform:translate(-2px,-2px); box-shadow:7px 7px 0 var(--ink); background:var(--coral-deep); }
.btn-outline {
  background:var(--paper); border:1.5px solid var(--ink); color:var(--ink);
  box-shadow:4px 4px 0 rgba(34,29,26,.16);
}
.btn-outline:hover{ transform:translate(-2px,-2px); box-shadow:7px 7px 0 rgba(34,29,26,.22); background:var(--cream-2); }

/* 标签/标题 */
.section-label {
  display:inline-block; font-size:.78rem; font-weight:800;
  letter-spacing:3px; margin-bottom:14px;
  color:var(--teal); text-transform:uppercase;
}
.section-label::before{
  content:""; display:inline-block; width:22px; height:2px;
  background:var(--coral); vertical-align:middle;
  margin-right:10px; border-radius:2px;
}
.section-title {
  font-size:clamp(1.6rem,3.6vw,2.3rem);
  margin-bottom:14px; font-weight:900; letter-spacing:-.03em;
  line-height:1.2;
}
.section-desc { max-width:600px; opacity:.72; margin-bottom:40px; color:var(--ink-soft); }

/* 卡片网格 */
.cards-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(260px,1fr)); gap:24px; }
.category-card {
  border-radius:var(--radius); padding:28px;
  border:1.5px solid var(--line);
  background:var(--paper);
  transition:.28s cubic-bezier(.2,.8,.2,1);
  position:relative; overflow:hidden;
}
.category-card::before{
  content:""; position:absolute; left:0; top:0; height:4px; width:0;
  background:linear-gradient(90deg,var(--coral),var(--lilac),var(--teal));
  transition:width .4s cubic-bezier(.2,.8,.2,1);
}
.category-card:hover {
  transform:translateY(-6px);
  border-color:var(--ink);
  box-shadow:var(--shadow-soft);
}
.category-card:hover::before{ width:100%; }

.card-icon {
  width:48px; height:48px; border-radius:14px;
  display:flex; align-items:center; justify-content:center;
  margin-bottom:16px; font-size:1.3rem;
  background:var(--cream-2); border:1.5px solid var(--line);
}
.category-card:nth-child(3n+1) .card-icon{ background:#FFE4DC; }
.category-card:nth-child(3n+2) .card-icon{ background:#E6E0FF; }
.category-card:nth-child(3n+3) .card-icon{ background:#D9F3EF; }

.category-card h3{ font-size:1.08rem; font-weight:800; margin-bottom:8px; letter-spacing:-.01em; }
.category-card p{ font-size:.92rem; color:var(--ink-soft); margin-bottom:14px; }

.card-link {
  font-weight:800; font-size:.85rem;
  text-decoration:none; color:var(--coral-deep);
  display:inline-flex; align-items:center; gap:6px;
}
.card-link::after{ content:"→"; transition:transform .25s; }
.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(--radius); overflow:hidden;
  border:1.5px solid var(--ink);
  box-shadow:var(--shadow);
  background:linear-gradient(150deg,#EDE6FF,#FFE9DF);
}
.feature-image img { width:100%; height:auto; }
.feature-text { }
.feature-text h2{ font-size:clamp(1.5rem,3.2vw,2.1rem); font-weight:900; letter-spacing:-.03em; margin-bottom:14px; line-height:1.22; }
.feature-text > p{ color:var(--ink-soft); margin-bottom:20px; }

.feature-list { list-style:none; }
.feature-list li {
  padding:9px 0; display:flex; align-items:center; gap:12px;
  font-weight:600; font-size:.95rem;
  border-bottom:1px dashed var(--line);
}
.feature-list li:last-child{ border-bottom:none; }
.feature-list li::before {
  content:'✓'; font-weight:900;
  width:22px; height:22px; flex:0 0 22px;
  display:flex; align-items:center; justify-content:center;
  font-size:.72rem; color:#fff;
  background:var(--teal); border-radius:50%;
}

/* 数据条 */
.stats-bar { display:grid; grid-template-columns:repeat(4,1fr); gap:24px; text-align:center; }
.stat-item {
  padding:28px 20px; border-radius:var(--radius);
  border:1.5px solid var(--line); background:var(--paper);
  transition:.25s cubic-bezier(.2,.8,.2,1);
}
.stat-item:nth-child(1){ background:#FFF1EC; }
.stat-item:nth-child(2){ background:#EFEAFF; }
.stat-item:nth-child(3){ background:#E4F7F4; }
.stat-item:nth-child(4){ background:#FFF6DF; }
.stat-item:hover{ transform:translateY(-5px) rotate(-1deg); border-color:var(--ink); box-shadow:5px 5px 0 rgba(34,29,26,.9); }
.stat-number {
  font-size:2.3rem; font-weight:900; letter-spacing:-.045em;
  line-height:1.1;
  background:linear-gradient(120deg,var(--coral-deep),var(--lilac));
  -webkit-background-clip:text; background-clip:text; -webkit-text-fill-color:transparent;
}
.stat-label { font-size:.9rem; color:var(--ink-soft); margin-top:6px; font-weight:600; }

/* 内容墙 */
.content-wall { display:grid; grid-template-columns:repeat(auto-fill,minmax(280px,1fr)); gap:24px; }
.content-wall-item {
  border-radius:var(--radius); overflow:hidden;
  border:1.5px solid var(--line); background:var(--paper);
  transition:.28s cubic-bezier(.2,.8,.2,1);
}
.content-wall-item:hover { transform:translateY(-6px); border-color:var(--ink); box-shadow:var(--shadow-soft); }
.content-wall-item img { width:100%; height:200px; object-fit:cover; transition:transform .5s cubic-bezier(.2,.8,.2,1); }
.content-wall-item:hover img{ transform:scale(1.05); }
.content-wall-body { padding:20px; }
.content-wall-body h3{ font-size:1.02rem; font-weight:800; margin-bottom:6px; }
.content-wall-body p{ font-size:.9rem; color:var(--ink-soft); }

/* FAQ */
.faq-list { max-width:800px; margin:0 auto; }
.faq-item {
  border:1.5px solid var(--line); border-radius:var(--radius-sm);
  margin-bottom:10px; overflow:hidden; cursor:pointer;
  background:var(--paper);
  transition:.22s;
}
.faq-item:hover{ border-color:var(--ink); }
.faq-item .faq-question {
  padding:18px 22px; font-weight:700;
  display:flex; justify-content:space-between; align-items:center; gap:16px;
  font-size:.98rem;
}
.faq-item .faq-question::after{
  content:"+"; font-weight:900; font-size:1.2rem;
  color:var(--coral); transition:transform .25s; flex:0 0 auto;
}
.faq-item.open{ border-color:var(--ink); box-shadow:4px 4px 0 rgba(34,29,26,.9); }
.faq-item.open .faq-question::after{ transform:rotate(45deg); }
.faq-item .faq-answer { padding:0 22px 18px; display:none; opacity:.74; font-size:.94rem; }
.faq-item.open .faq-answer { display:block; }

/* CTA横幅 */
.cta-banner {
  padding:56px 24px; text-align:center; border-radius:28px; color:#fff;
  background:linear-gradient(120deg,var(--coral) 0%,var(--lilac) 52%,var(--teal) 110%);
  border:1.5px solid var(--ink);
  box-shadow:var(--shadow);
  position:relative; overflow:hidden;
}
.cta-banner::before{
  content:""; position:absolute; inset:-40% -10%;
  background:radial-gradient(closest-side,rgba(255,255,255,.35),transparent 70%);
  animation:floaty 9s ease-in-out infinite alternate;
}
@keyframes floaty{ from{ transform:translate3d(-6%,-4%,0) } to{ transform:translate3d(8%,6%,0) } }
.cta-banner h2 { color:#fff; font-size:clamp(1.5rem,3.4vw,2.2rem); font-weight:900; letter-spacing:-.03em; margin-bottom:12px; position:relative; }
.cta-banner p{ position:relative; opacity:.92; margin-bottom:26px; }
.cta-banner .btn-primary { background:#fff; color:var(--ink); position:relative; box-shadow:4px 4px 0 rgba(34,29,26,.85); }
.cta-banner .btn-primary:hover{ box-shadow:7px 7px 0 rgba(34,29,26,.85); }

/* 页脚 */
.site-footer {
  padding:56px 0 28px;
  background:linear-gradient(180deg,rgba(255,255,255,.55),rgba(255,240,227,.9));
  border-top:1.5px solid var(--line);
}
.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:12px; }
.footer-col { }
.footer-col h4{ font-size:.82rem; font-weight:800; letter-spacing:2px; text-transform:uppercase; margin-bottom:14px; color:var(--ink); }
.footer-col ul{ list-style:none; }
.footer-col ul li{ margin-bottom:9px; }
.footer-col a{ text-decoration:none; font-size:.9rem; color:var(--ink-soft); transition:.2s; }
.footer-col a:hover{ color:var(--coral-deep); padding-left:4px; }

.footer-bottom {
  border-top:1px solid var(--line);
  margin-top:40px; padding-top:20px;
  text-align:center; font-size:.85rem; color:var(--ink-soft);
}

/* 工具类 */
.text-accent { color:var(--coral-deep); font-weight:800; }
.text-center { text-align:center; }
.seo-description { max-width:600px; margin:0 auto 48px; opacity:.72; color:var(--ink-soft); }
.mt-0 { margin-top:0; }
.mb-0 { margin-bottom:0; }

/* 微动效入场 */
.section .container{ animation:rise .7s cubic-bezier(.2,.8,.2,1) both; }
@keyframes rise{ from{ opacity:0; transform:translateY(18px); } to{ opacity:1; transform:none; } }

/* ⚠️ 响应式 */
@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; align-items:flex-start;
    position:absolute; top:68px; left:0; width:100%;
    background:rgba(255,248,239,.98);
    padding:20px 24px; gap:16px;
    border-bottom:1.5px solid var(--line);
    box-shadow:0 18px 40px -22px rgba(34,29,26,.4);
  }
  .hero{ padding:130px 0 72px; }
  .hero::after{ width:340px; height:340px; right:-160px; }
  .section{ padding:60px 0; }
  .cta-banner{ border-radius:20px; padding:44px 20px; }
}

@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{ justify-content:center; width:100%; }
  .section{ padding:52px 0; }
  .stat-item:hover{ transform:none; box-shadow:none; }
}