/* ==========================================================
   RISOGRAPH EDITORIAL — Design System
   Palette: warm paper · electric indigo · coral · butter · mint
   ========================================================== */

:root{
  --paper:#FFFBF2;
  --paper-2:#FDF2E3;
  --paper-3:#F6EBDA;
  --ink:#221D3C;
  --ink-2:#5B5478;
  --line:#221D3C;
  --indigo:#3D2FE8;
  --indigo-t:#EDEBFF;
  --coral:#FF5A47;
  --coral-t:#FFE8E4;
  --butter:#FFD34D;
  --butter-t:#FFF6D9;
  --mint:#8FE0BE;
  --mint-t:#E3F8EF;
  --radius:18px;
  --radius-sm:10px;
  --radius-lg:28px;
  --shadow-soft:0 24px 50px -28px rgba(34,29,60,.5);
  --shadow-hard:7px 7px 0 var(--line);
  --shadow-hard-sm:4px 4px 0 var(--line);
  --ease:cubic-bezier(.2,.85,.25,1);
  --max:1200px;
}

/* 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(--paper);
  background-image:radial-gradient(rgba(34,29,60,.075) 1px, transparent 1px);
  background-size:26px 26px;
  color:var(--ink);
  line-height:1.7;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
  font-feature-settings:"tnum" 1;
}

img{ max-width:100%; display:block; }
a{ color:inherit; }
::selection{ background:var(--butter); color:var(--ink); }

::-webkit-scrollbar{ width:11px; }
::-webkit-scrollbar-track{ background:var(--paper-2); }
::-webkit-scrollbar-thumb{ background:var(--ink); border:3px solid var(--paper-2); border-radius:20px; }
::-webkit-scrollbar-thumb:hover{ background:var(--coral); }

/* 核心布局 — 居中 */
.container { max-width:1200px; margin:0 auto; padding:0 24px; }
.section { padding:80px 0; background:transparent; }
.section:nth-child(even) { background:#f8f9fa; }
.section:nth-child(even){
  background-color:var(--paper-2);
  background-image:linear-gradient(180deg, rgba(255,255,255,.5), rgba(255,255,255,0));
  border-top:1px solid rgba(34,29,60,.14);
  border-bottom:1px solid rgba(34,29,60,.14);
}

/* 导航 — 固定顶部 */
.site-header {
  position:fixed; top:0; left:0; width:100%; z-index:1000;
  background:rgba(255,251,242,0.92);
  backdrop-filter:blur(10px) saturate(1.4);
  -webkit-backdrop-filter:blur(10px) saturate(1.4);
  border-bottom:1px solid #eee;
  border-bottom:2px 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:700; font-size:1.2rem; text-decoration:none; color:inherit;
  letter-spacing:-.02em; font-weight:900;
}
.logo-icon {
  width:36px; height:36px; border-radius:8px;
  display:flex; align-items:center; justify-content:center; font-size:1rem;
  background:linear-gradient(135deg,var(--indigo) 0%, var(--indigo) 48%, var(--coral) 52%, var(--coral) 100%);
  color:#fff; border:2px solid var(--line);
  box-shadow:3px 3px 0 var(--line);
  transform:rotate(-6deg);
  transition:transform .5s var(--ease);
}
.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:0.9rem; font-weight:500;
  transition:0.2s;
  position:relative; padding:6px 2px; color:var(--ink-2); font-weight:600;
}
.main-nav a::after{
  content:''; position:absolute; left:0; bottom:0; height:2px; width:100%;
  background:var(--coral); transform:scaleX(0); transform-origin:right;
  transition:transform .35s var(--ease);
}
.main-nav a:hover{ color:var(--ink); }
.main-nav a:hover::after{ transform:scaleX(1); transform-origin:left; }

.nav-cta {
  padding:8px 20px; border-radius:8px; color:#fff!important; font-weight:600;
  background:var(--indigo)!important; border:2px solid var(--line);
  border-radius:999px; box-shadow:3px 3px 0 var(--line);
  transition:transform .2s var(--ease), box-shadow .2s var(--ease), background .2s;
  position:static;
}
.nav-cta::after{ display:none; }
.nav-cta:hover{
  transform:translate(-2px,-2px);
  box-shadow:5px 5px 0 var(--line);
  background:var(--coral)!important;
}

.menu-toggle { display:none; }

/* 首页 Hero */
.hero {
  min-height:70vh; display:flex; align-items:center;
  position:relative; overflow:hidden;
  padding:150px 0 96px;
}
.hero .container{ width:100%; position:relative; z-index:2; }

.hero::before{
  content:''; position:absolute; z-index:0; pointer-events:none;
  width:620px; height:620px; right:-190px; top:-140px; border-radius:50%;
  background:radial-gradient(circle at 35% 35%, rgba(255,90,71,.42), rgba(255,211,77,.3) 46%, rgba(255,211,77,0) 72%);
  filter:blur(6px);
}
.hero::after{
  content:''; position:absolute; z-index:0; pointer-events:none;
  width:460px; height:460px; left:-200px; bottom:-190px; border-radius:50%;
  background:radial-gradient(circle at 50% 50%, rgba(61,47,232,.26), rgba(61,47,232,0) 70%);
}
.hero-content { max-width:720px; position:relative; z-index:2; }

.hero-eyebrow {
  display:inline-block; font-size:0.85rem; font-weight:600;
  padding:4px 14px; border-radius:20px; margin-bottom:16px;
  background:var(--butter); border:2px solid var(--line);
  box-shadow:3px 3px 0 var(--line);
  font-size:.78rem; letter-spacing:.14em; text-transform:uppercase;
  padding:7px 18px; border-radius:999px; font-weight:800;
  transform:rotate(-1.5deg);
}
.hero h1 {
  font-size:2.8rem; line-height:1.2; margin-bottom:20px;
  font-size:clamp(2.3rem, 5.6vw, 4.2rem);
  font-weight:900; line-height:1.06; letter-spacing:-.04em;
}
.hero p {
  font-size:1.1rem; opacity:0.7; max-width:560px; margin-bottom:32px;
  color:var(--ink-2); opacity:1; font-size:1.08rem; line-height:1.85;
}
.hero-buttons { display:flex; gap:14px; flex-wrap:wrap; }
.hero-image { border-radius:12px; overflow:hidden; }
.hero-image img { width:100%; height:auto; }

/* 按钮 */
.btn {
  display:inline-flex; align-items:center; gap:8px;
  padding:12px 28px; border-radius:8px; font-weight:600;
  cursor:pointer; border:none; text-decoration:none; transition:0.2s;
  font-size:.95rem; letter-spacing:.01em;
  border-radius:999px; font-weight:800;
  border:2px solid var(--line);
  transition:transform .2s var(--ease), box-shadow .2s var(--ease), background .25s, color .25s;
  will-change:transform;
}
.btn-primary {
  color:#fff;
  background:var(--indigo);
  box-shadow:5px 5px 0 var(--line);
}
.btn-primary:hover{
  transform:translate(-3px,-3px);
  box-shadow:8px 8px 0 var(--line);
  background:var(--coral);
}
.btn-primary:active{ transform:translate(2px,2px); box-shadow:2px 2px 0 var(--line); }

.btn-outline {
  background:transparent; border:1.5px solid;
  border:2px solid var(--line); color:var(--ink); background:var(--paper);
  box-shadow:5px 5px 0 var(--line);
}
.btn-outline:hover{
  transform:translate(-3px,-3px);
  box-shadow:8px 8px 0 var(--line);
  background:var(--butter);
}

/* 标签 / 标题 */
.section-label {
  display:inline-block; font-size:0.8rem; font-weight:600;
  letter-spacing:2px; margin-bottom:12px;
  color:var(--indigo); text-transform:uppercase;
  font-weight:900; letter-spacing:.22em; font-size:.72rem;
  position:relative; padding-left:34px;
}
.section-label::before{
  content:''; position:absolute; left:0; top:50%; width:22px; height:2px;
  background:var(--coral); transform:translateY(-50%);
}
.section-title {
  font-size:2rem; margin-bottom:14px;
  font-size:clamp(1.7rem, 3.6vw, 2.7rem);
  font-weight:900; letter-spacing:-.035em; line-height:1.15;
}
.section-desc { max-width:600px; opacity:0.7; margin-bottom:40px;
  color:var(--ink-2); opacity:1; font-size:1.02rem; line-height:1.85; }

/* 卡片网格 */
.cards-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(260px,1fr)); gap:24px; }
.category-card {
  border-radius:12px; padding:28px; border:1px solid #eee; transition:0.2s;
  background:#fff; border:2px solid var(--line);
  border-radius:var(--radius); position:relative; overflow:hidden;
  box-shadow:var(--shadow-hard-sm);
  transition:transform .28s var(--ease), box-shadow .28s var(--ease), background .28s;
}
.category-card::after{
  content:''; position:absolute; right:-40px; bottom:-40px;
  width:110px; height:110px; border-radius:50%;
  background:var(--butter); opacity:.35; transition:.4s var(--ease);
}
.category-card:hover {
  transform:translateY(-3px); box-shadow:0 4px 16px rgba(0,0,0,0.1);
  transform:translate(-4px,-4px);
  box-shadow:11px 11px 0 var(--line);
  background:var(--butter-t);
}
.category-card:hover::after{ transform:scale(1.5); opacity:.5; }

.card-icon {
  width:48px; height:48px; border-radius:10px;
  display:flex; align-items:center; justify-content:center;
  margin-bottom:16px; font-size:1.3rem;
  border:2px solid var(--line); background:var(--mint-t);
  border-radius:14px; font-size:1.25rem;
  box-shadow:3px 3px 0 var(--line);
}
.category-card:nth-child(3n+2) .card-icon{ background:var(--coral-t); }
.category-card:nth-child(3n+3) .card-icon{ background:var(--indigo-t); }

.card-link {
  font-weight:600; font-size:0.85rem; text-decoration:none;
  color:var(--indigo); font-weight:800; letter-spacing:.02em;
  display:inline-flex; align-items:center; gap:6px;
  border-bottom:2px solid transparent; transition:.25s;
}
.card-link::after{ content:'→'; transition:transform .25s var(--ease); }
.card-link:hover{ color:var(--coral); }
.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:12px; overflow:hidden; }
.feature-image img { width:100%; height:auto; }
.feature-image{
  border:2px solid var(--line); border-radius:var(--radius-lg);
  box-shadow:var(--shadow-hard); transform:rotate(-1.6deg);
  background:var(--paper-3);
  transition:transform .5s var(--ease);
}
.feature-block:nth-child(even) .feature-image{ transform:rotate(1.6deg); }
.feature-image:hover{ transform:rotate(0deg) translate(-3px,-3px); }
.feature-text { }
.feature-text h3{
  font-size:clamp(1.4rem,2.6vw,2rem); font-weight:900;
  letter-spacing:-.03em; margin-bottom:14px; line-height:1.2;
}
.feature-text p{ color:var(--ink-2); line-height:1.85; margin-bottom:20px; }
.feature-list { list-style:none; }
.feature-list li {
  padding:6px 0; display:flex; align-items:center; gap:8px;
  padding:9px 0; color:var(--ink); font-weight:600; font-size:.95rem;
}
.feature-list li::before {
  content:'✓'; font-weight:700;
  width:22px; height:22px; flex:0 0 22px; border-radius:50%;
  display:inline-flex; align-items:center; justify-content:center;
  background:var(--mint); border:2px solid var(--line);
  font-size:.7rem; color:var(--ink);
}

/* 数据条 */
.stats-bar { display:grid; grid-template-columns:repeat(4,1fr); gap:24px; text-align:center; }
.stat-item {
  padding:24px; border-radius:12px; border:1px solid #eee;
  border:2px solid var(--line); border-radius:var(--radius);
  background:#fff; box-shadow:var(--shadow-hard-sm);
  transition:transform .25s var(--ease), box-shadow .25s var(--ease);
}
.stat-item:hover{ transform:translate(-3px,-3px); box-shadow:8px 8px 0 var(--line); }
.stat-item:nth-child(1){ background:var(--butter-t); }
.stat-item:nth-child(2){ background:var(--mint-t); }
.stat-item:nth-child(3){ background:var(--coral-t); }
.stat-item:nth-child(4){ background:var(--indigo-t); }

.stat-number {
  font-size:2.2rem; font-weight:800;
  font-size:clamp(2rem,4vw,2.9rem); font-weight:900;
  letter-spacing:-.05em; line-height:1;
  color:var(--ink); font-variant-numeric:tabular-nums;
}
.stat-label { font-size:0.9rem; opacity:0.6; margin-top:6px;
  color:var(--ink-2); opacity:1; font-weight:600;
  font-size:.82rem; letter-spacing:.06em; text-transform:uppercase; margin-top:12px; }

/* 内容墙 */
.content-wall { display:grid; grid-template-columns:repeat(auto-fill,minmax(280px,1fr)); gap:24px; }
.content-wall-item {
  border-radius:12px; overflow:hidden; border:1px solid #eee; transition:0.2s;
  background:#fff; border:2px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow-hard-sm);
  transition:transform .3s var(--ease), box-shadow .3s var(--ease);
}
.content-wall-item:hover {
  transform:translateY(-3px); box-shadow:0 4px 16px rgba(0,0,0,0.1);
  transform:translate(-4px,-4px); box-shadow:11px 11px 0 var(--line);
}
.content-wall-item img { width:100%; height:200px; object-fit:cover;
  border-bottom:2px solid var(--line); filter:saturate(1.05) contrast(1.03);
  transition:transform .6s var(--ease);
}
.content-wall-item:hover img{ transform:scale(1.04); }
.content-wall-body { padding:20px;
  padding:22px 22px 26px; }
.content-wall-body h3{ font-weight:900; letter-spacing:-.02em; margin-bottom:8px; font-size:1.08rem; }
.content-wall-body p{ color:var(--ink-2); font-size:.92rem; line-height:1.75; }

/* FAQ */
.faq-list { max-width:800px; margin:0 auto; }
.faq-item {
  border:1px solid #eee; border-radius:10px; margin-bottom:8px;
  overflow:hidden; cursor:pointer;
  border:2px solid var(--line); border-radius:var(--radius-sm);
  background:#fff; margin-bottom:12px;
  box-shadow:3px 3px 0 var(--line);
  transition:transform .25s var(--ease), box-shadow .25s var(--ease), background .25s;
}
.faq-item:hover{ transform:translate(-2px,-2px); box-shadow:6px 6px 0 var(--line); }
.faq-item .faq-question {
  padding:16px 20px; font-weight:600;
  display:flex; justify-content:space-between;
  padding:20px 24px; font-weight:800; letter-spacing:-.01em;
  align-items:center; gap:16px;
}
.faq-item .faq-answer {
  padding:0 20px 16px; display:none; opacity:0.7;
  padding:0 24px 22px; color:var(--ink-2); opacity:1;
  line-height:1.85; border-top:1px dashed rgba(34,29,60,.25);
  margin:0 24px; padding:16px 0 22px;
}
.faq-item.open .faq-answer { display:block; }
.faq-item.open{ background:var(--butter-t); box-shadow:6px 6px 0 var(--line); transform:translate(-2px,-2px); }

/* CTA 横幅 */
.cta-banner {
  padding:56px 24px; text-align:center; border-radius:12px; color:#fff;
  border-radius:var(--radius-lg);
  background:linear-gradient(118deg, var(--indigo) 0%, var(--indigo) 34%, var(--coral) 100%);
  border:2px solid var(--line);
  box-shadow:10px 10px 0 var(--line);
  position:relative; overflow:hidden;
  padding:72px 32px;
}
.cta-banner::before{
  content:''; position:absolute; inset:0; opacity:.28; pointer-events:none;
  background-image:radial-gradient(rgba(255,255,255,.85) 1.5px, transparent 1.5px);
  background-size:18px 18px;
  mix-blend-mode:overlay;
}
.cta-banner h2 { color:#fff; position:relative; z-index:1;
  font-size:clamp(1.7rem,3.4vw,2.5rem); font-weight:900; letter-spacing:-.035em; }
.cta-banner p{ position:relative; z-index:1; opacity:.9; max-width:560px; margin:14px auto 28px; line-height:1.8; }
.cta-banner .btn-primary {
  background:#fff; color:var(--ink);
  position:relative; z-index:1;
  box-shadow:5px 5px 0 var(--line);
}
.cta-banner .btn-primary:hover{ background:var(--butter); color:var(--ink); }

/* 页脚 */
.site-footer {
  padding:56px 0 28px;
  background:var(--paper-2);
  border-top:2px solid var(--line);
  margin-top:0;
}
.site-footer .container { }
.footer-grid { display:grid; grid-template-columns:2fr 1fr 1fr 1fr; gap:40px; }
.footer-brand { }
.footer-brand p{ color:var(--ink-2); font-size:.92rem; line-height:1.8; max-width:320px; margin-top:14px; }
.footer-col { }
.footer-col h4{
  font-size:.78rem; letter-spacing:.18em; text-transform:uppercase;
  font-weight:900; color:var(--ink); margin-bottom:16px;
}
.footer-col ul{ list-style:none; }
.footer-col li{ margin-bottom:9px; }
.footer-col a{
  text-decoration:none; color:var(--ink-2); font-size:.92rem;
  transition:.22s; border-bottom:1px solid transparent;
}
.footer-col a:hover{ color:var(--coral); border-bottom-color:var(--coral); }

.footer-bottom {
  border-top:1px solid rgba(255,255,255,0.1); margin-top:40px; padding-top:20px;
  text-align:center; font-size:0.85rem;
  border-top:1px dashed rgba(34,29,60,.3);
  color:var(--ink-2); letter-spacing:.02em;
}

/* 工具类 */
.text-accent { }
.text-accent{ color:var(--coral); }
.hero .text-accent,
.section-title .text-accent{
  background:linear-gradient(transparent 60%, var(--butter) 60%);
  color:var(--ink); padding:0 .08em;
  -webkit-box-decoration-break:clone; box-decoration-break:clone;
}
.text-center { text-align:center; }
.text-center .section-label{ padding-left:34px; }
.text-center .section-desc{ margin-left:auto; margin-right:auto; }
.seo-description { max-width:600px; margin:0 auto 48px; opacity:0.7; }
.seo-description{ color:var(--ink-2); opacity:1; line-height:1.9; font-size:1rem; }
.mt-0 { margin-top:0; }
.mb-0 { margin-bottom:0; }

/* 细节修饰 */
.section .container > * + *{ }
.category-card h3,
.content-wall-body h2{ font-weight:900; letter-spacing:-.02em; }
.category-card p{ color:var(--ink-2); font-size:.92rem; line-height:1.78; margin:10px 0 16px; }

a:focus-visible,
button:focus-visible,
.btn:focus-visible,
.faq-item:focus-visible{
  outline:3px solid var(--coral);
  outline-offset:3px;
  border-radius:6px;
}

@media (prefers-reduced-motion: reduce){
  *{ animation-duration:.001ms!important; transition-duration:.001ms!important; }
  html{ scroll-behavior:auto; }
}

/* ⚠️ 响应式 */
@media (max-width: 900px){
  .footer-grid{ grid-template-columns:1fr 1fr; gap:32px; }
  .feature-block{ gap:36px; }
}

@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:68px; left:0;
    width:100%; background:#fff; padding:20px;
    background:var(--paper); border-bottom:2px solid var(--line);
    padding:24px; gap:18px; align-items:flex-start;
    box-shadow:0 18px 30px -20px rgba(34,29,60,.6);
  }
  .main-nav.open a{ font-size:1rem; }
  .main-nav.open .nav-cta{ margin-top:6px; }

  .menu-toggle{
    display:none;
    width:42px; height:42px; align-items:center; justify-content:center;
    background:var(--butter); border:2px solid var(--line);
    border-radius:12px; cursor:pointer; color:var(--ink);
    box-shadow:3px 3px 0 var(--line);
    transition:transform .2s var(--ease), box-shadow .2s var(--ease);
  }
  .menu-toggle:hover{ transform:translate(-2px,-2px); box-shadow:5px 5px 0 var(--line); }

  .hero{ padding:120px 0 72px; }
  .section{ padding:64px 0; }
  .cta-banner{ padding:56px 22px; }
  .faq-item .faq-answer{ margin:0 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{ width:100%; justify-content:center; }
  .hero-eyebrow{ font-size:.7rem; letter-spacing:.1em; }
  .cta-banner{ box-shadow:6px 6px 0 var(--line); }
  .container{ padding:0 18px; }
  .header-inner{ padding:0 18px; }
}