/* ============================================================
   禁天堂 · Design System  「网住风险，放行美好」
   风格：暖纸编辑体 × 网格新粗野 —— 奶油纸 / 松墨绿 / 珊瑚橘
   ============================================================ */

:root{
  --paper:      #f6f2e9;
  --paper-2:    #eee8db;
  --paper-3:    #fffdf9;
  --ink:        #0d332c;
  --ink-soft:   #2c4f47;
  --ink-40:     rgba(13,51,44,.40);
  --ink-14:     rgba(13,51,44,.14);
  --ink-08:     rgba(13,51,44,.08);
  --coral:      #ff5a36;
  --coral-soft: #ffdfd6;
  --coral-deep: #c93a17;
  --mint:       #12b18a;
  --radius:     16px;
  --shadow-h:   5px 5px 0 rgba(13,51,44,.07);
  --shadow-h2:  9px 9px 0 rgba(255,90,54,.22);
  --ease:       cubic-bezier(.2,.7,.3,1);
}

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

html{ scroll-behavior:smooth; }

body {
  font-family: system-ui, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  overflow-x:hidden;
  background-color: var(--paper);
  color: var(--ink);
  line-height:1.62;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

::selection{ background: var(--coral); color:#fff8f4; }

::-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:99px;
}
::-webkit-scrollbar-thumb:hover{ background: var(--coral); }

:focus-visible{
  outline:2.5px dashed var(--coral);
  outline-offset:3px;
  border-radius:4px;
}

/* ============ 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(--paper-2);
  background-image:
    radial-gradient(rgba(13,51,44,.055) 1px, transparent 1px);
  background-size:20px 20px;
  border-top:1px solid var(--ink-08);
  border-bottom:1px solid var(--ink-08);
}

/* ============ 导航 ============ */
.site-header {
  position:fixed;
  top:0; left:0;
  width:100%;
  z-index:1000;
  background:rgba(246,242,233,.82);
  backdrop-filter:blur(14px) saturate(1.4);
  -webkit-backdrop-filter:blur(14px) saturate(1.4);
  border-bottom:1px solid var(--ink-08);
}

.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:800;
  font-size:1.2rem;
  letter-spacing:-.02em;
  text-decoration:none;
  color:var(--ink);
}

.logo-icon {
  width:36px;
  height:36px;
  border-radius:8px 8px 8px 2px;
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:1rem;
  background:var(--coral);
  color:#fff8f4;
  box-shadow:3px 3px 0 var(--ink);
  transition:transform .25s var(--ease), box-shadow .25s var(--ease);
}
.logo:hover .logo-icon{
  transform:translate(-2px,-2px) rotate(-6deg);
  box-shadow:5px 5px 0 var(--ink);
}

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

.main-nav a {
  text-decoration:none;
  font-size:.9rem;
  font-weight:500;
  color:var(--ink-soft);
  position:relative;
  padding:4px 0;
  transition:color .2s var(--ease);
}

.main-nav a::after{
  content:'';
  position:absolute;
  left:0; bottom:-1px;
  width:0; height:2px;
  background:var(--coral);
  border-radius:2px;
  transition:width .3s var(--ease);
}
.main-nav a:hover{ color:var(--ink); }
.main-nav a:hover::after{ width:100%; }

.nav-cta {
  padding:9px 20px;
  border-radius:9px 9px 9px 3px;
  color:#fff8f4 !important;
  font-weight:600;
  background:var(--ink);
  box-shadow:3px 3px 0 var(--coral);
  transition:transform .2s var(--ease), box-shadow .2s var(--ease), background .2s;
}
.nav-cta::after{ display:none; }
.nav-cta:hover{
  background:var(--coral);
  transform:translate(-2px,-2px);
  box-shadow:5px 5px 0 var(--ink);
}

.menu-toggle {
  display:none;
  width:40px; height:40px;
  align-items:center;
  justify-content:center;
  border:1.5px solid var(--ink);
  border-radius:9px;
  background:var(--paper-3);
  color:var(--ink);
  cursor:pointer;
  font-size:1.1rem;
  line-height:1;
}

/* ============ 首页 Hero ============ */
.hero {
  min-height:70vh;
  display:flex;
  align-items:center;
  position:relative;
  overflow:hidden;
  padding:132px 0 88px;
}

.hero::before{
  content:'';
  position:absolute;
  inset:0;
  background-image:
    linear-gradient(var(--ink-08) 1px, transparent 1px),
    linear-gradient(90deg, var(--ink-08) 1px, transparent 1px);
  background-size:62px 62px;
  -webkit-mask-image:radial-gradient(circle at 76% 42%, #000 0%, transparent 72%);
  mask-image:radial-gradient(circle at 76% 42%, #000 0%, transparent 72%);
  pointer-events:none;
}

.hero::after{
  content:'';
  position:absolute;
  top:-90px; right:-120px;
  width:460px; height:460px;
  border-radius:50%;
  background:radial-gradient(circle, rgba(255,90,54,.28), rgba(255,90,54,0) 68%);
  filter:blur(6px);
  pointer-events:none;
}

.hero-content {
  max-width:720px;
  position:relative;
  z-index:2;
}

.hero-eyebrow {
  display:inline-block;
  font-size:.8rem;
  font-weight:700;
  letter-spacing:.14em;
  padding:6px 16px;
  border-radius:99px;
  margin-bottom:22px;
  background:var(--coral-soft);
  color:var(--coral-deep);
  border:1px solid rgba(255,90,54,.28);
}
.hero-eyebrow::before{
  content:'●';
  font-size:.6rem;
  margin-right:8px;
  color:var(--coral);
  vertical-align:2px;
}

.hero h1 {
  font-size:clamp(2.2rem, 5.2vw, 3.7rem);
  line-height:1.14;
  letter-spacing:-.035em;
  font-weight:800;
  margin-bottom:22px;
  color:var(--ink);
}

.hero p {
  font-size:1.08rem;
  color:var(--ink-soft);
  opacity:.82;
  max-width:540px;
  margin-bottom:34px;
  line-height:1.8;
}

.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-h);
}
.hero-image img { width:100%; height:auto; }

/* ============ 按钮 ============ */
.btn {
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:13px 30px;
  border-radius:11px 11px 11px 3px;
  font-weight:600;
  font-size:.95rem;
  cursor:pointer;
  border:none;
  text-decoration:none;
  transition:transform .2s var(--ease), box-shadow .2s var(--ease), background .2s, color .2s;
  will-change:transform;
}

.btn-primary {
  color:#fff8f4;
  background:var(--ink);
  box-shadow:4px 4px 0 var(--coral);
}
.btn-primary:hover{
  background:var(--coral);
  transform:translate(-3px,-3px);
  box-shadow:7px 7px 0 var(--ink);
}
.btn-primary:active{
  transform:translate(0,0);
  box-shadow:2px 2px 0 var(--ink);
}

.btn-outline {
  background:transparent;
  border:1.5px solid var(--ink);
  color:var(--ink);
}
.btn-outline:hover{
  background:var(--ink);
  color:#fff8f4;
  transform:translate(-2px,-2px);
  box-shadow:5px 5px 0 rgba(255,90,54,.45);
}

/* ============ 标签 / 标题 ============ */
.section-label {
  display:inline-block;
  font-size:.76rem;
  font-weight:700;
  letter-spacing:.26em;
  margin-bottom:14px;
  color:var(--coral);
  text-transform:uppercase;
}
.section-label::after{
  content:'';
  display:block;
  width:28px; height:2px;
  background:var(--coral);
  margin-top:8px;
  border-radius:2px;
}

.section-title {
  font-size:clamp(1.6rem, 3vw, 2.35rem);
  font-weight:800;
  letter-spacing:-.028em;
  line-height:1.25;
  margin-bottom:16px;
  color:var(--ink);
}

.section-desc {
  max-width:600px;
  color:var(--ink-soft);
  opacity:.78;
  margin-bottom:44px;
  font-size:1rem;
  line-height:1.8;
}

/* ============ 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) var(--radius) var(--radius) 4px;
  padding:30px 28px;
  border:1.5px solid var(--ink-14);
  background:var(--paper-3);
  box-shadow:var(--shadow-h);
  transition:transform .28s var(--ease), box-shadow .28s var(--ease), border-color .28s;
  position:relative;
}
.category-card::before{
  content:'';
  position:absolute;
  top:0; left:0;
  width:100%; height:3px;
  background:linear-gradient(90deg, var(--coral), var(--mint));
  border-radius:var(--radius) var(--radius) 0 0;
  opacity:0;
  transition:opacity .28s var(--ease);
}
.category-card:hover {
  transform:translate(-4px,-4px);
  border-color:var(--ink);
  box-shadow:var(--shadow-h2);
}
.category-card:hover::before{ opacity:1; }

.card-icon {
  width:48px; height:48px;
  border-radius:12px 12px 12px 3px;
  display:flex;
  align-items:center;
  justify-content:center;
  margin-bottom:18px;
  font-size:1.3rem;
  background:var(--coral-soft);
  color:var(--coral-deep);
  border:1.5px solid rgba(255,90,54,.3);
}

.category-card h3{
  font-size:1.12rem;
  font-weight:700;
  letter-spacing:-.01em;
  margin-bottom:10px;
  color:var(--ink);
}

.category-card p{
  font-size:.92rem;
  color:var(--ink-soft);
  opacity:.8;
  line-height:1.75;
  margin-bottom:18px;
}

.card-link {
  font-weight:700;
  font-size:.85rem;
  text-decoration:none;
  color:var(--coral);
  display:inline-flex;
  align-items:center;
  gap:6px;
  transition:gap .25s var(--ease), color .25s;
}
.card-link::after{ content:'→'; transition:transform .25s var(--ease); }
.card-link:hover{ color:var(--coral-deep); }
.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) var(--radius) var(--radius) 4px;
  overflow:hidden;
  border:1.5px solid var(--ink);
  box-shadow:var(--shadow-h);
}
.feature-image img { width:100%; height:auto; }

.feature-text { }

.feature-text h3{
  font-size:clamp(1.4rem, 2.4vw, 1.9rem);
  font-weight:800;
  letter-spacing:-.028em;
  line-height:1.3;
  margin-bottom:16px;
  color:var(--ink);
}

.feature-text p{
  color:var(--ink-soft);
  opacity:.82;
  line-height:1.8;
  margin-bottom:22px;
}

.feature-list { list-style:none; }

.feature-list li {
  padding:8px 0;
  display:flex;
  align-items:center;
  gap:12px;
  font-size:.95rem;
  color:var(--ink-soft);
  border-bottom:1px dashed var(--ink-08);
}
.feature-list li:last-child{ border-bottom:none; }

.feature-list li::before {
  content:'✓';
  font-weight:700;
  flex:0 0 auto;
  width:22px; height:22px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  border-radius:50%;
  font-size:.68rem;
  background:var(--mint);
  color:#fff8f4;
}

/* ============ 数据条 ============ */
.stats-bar {
  display:grid;
  grid-template-columns:repeat(4, 1fr);
  gap:22px;
  text-align:center;
}

.stat-item {
  padding:28px 18px;
  border-radius:var(--radius) var(--radius) 4px var(--radius);
  border:1.5px solid var(--ink-14);
  background:var(--paper-3);
  box-shadow:var(--shadow-h);
  transition:transform .25s var(--ease), box-shadow .25s var(--ease);
}
.stat-item:hover{
  transform:translateY(-5px);
  box-shadow:6px 12px 0 rgba(13,51,44,.09);
}

.stat-number {
  font-size:clamp(1.8rem, 3.4vw, 2.4rem);
  font-weight:800;
  letter-spacing:-.04em;
  line-height:1.1;
  color:var(--ink);
  font-variant-numeric:tabular-nums;
}
.stat-item:nth-child(odd) .stat-number{ color:var(--coral); }

.stat-label {
  font-size:.85rem;
  color:var(--ink-soft);
  opacity:.68;
  margin-top:8px;
  letter-spacing:.04em;
}

/* ============ 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) var(--radius) var(--radius) 4px;
  overflow:hidden;
  border:1.5px solid var(--ink-14);
  background:var(--paper-3);
  box-shadow:var(--shadow-h);
  transition:transform .28s var(--ease), box-shadow .28s var(--ease), border-color .28s;
}
.content-wall-item:hover {
  transform:translate(-4px,-4px);
  border-color:var(--ink);
  box-shadow:var(--shadow-h2);
}

.content-wall-item img {
  width:100%;
  height:200px;
  object-fit:cover;
  transition:transform .5s var(--ease), filter .5s;
  filter:saturate(.94);
}
.content-wall-item:hover img{
  transform:scale(1.05);
  filter:saturate(1.08);
}

.content-wall-body { padding:22px; }

.content-wall-body h3{
  font-size:1.05rem;
  font-weight:700;
  letter-spacing:-.012em;
  margin-bottom:8px;
  color:var(--ink);
}
.content-wall-body p{
  font-size:.9rem;
  color:var(--ink-soft);
  opacity:.78;
  line-height:1.72;
}

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

.faq-item {
  border:1.5px solid var(--ink-14);
  border-radius:13px 13px 13px 3px;
  margin-bottom:10px;
  overflow:hidden;
  cursor:pointer;
  background:var(--paper-3);
  transition:border-color .25s var(--ease), box-shadow .25s var(--ease), transform .25s var(--ease);
}
.faq-item:hover{
  border-color:var(--ink);
  transform:translateX(3px);
}

.faq-item .faq-question {
  padding:18px 22px;
  font-weight:600;
  font-size:1rem;
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:16px;
  color:var(--ink);
}

.faq-item .faq-question::after{
  content:'+';
  flex:0 0 auto;
  font-size:1.3rem;
  line-height:1;
  font-weight:700;
  color:var(--coral);
  transition:transform .3s var(--ease), color .3s;
}

.faq-item.open{
  border-color:var(--ink);
  box-shadow:var(--shadow-h);
}
.faq-item.open .faq-question::after{
  content:'–';
  transform:rotate(180deg);
}

.faq-item .faq-answer {
  padding:0 22px 18px;
  display:none;
  color:var(--ink-soft);
  opacity:.82;
  line-height:1.82;
  font-size:.94rem;
}
.faq-item.open .faq-answer { display:block; }

/* ============ CTA横幅 ============ */
.cta-banner {
  padding:62px 32px;
  text-align:center;
  border-radius:24px 24px 24px 6px;
  color:#fff8f4;
  background:linear-gradient(128deg, #ff5a36 0%, #ff7e4f 48%, #ffa06a 100%);
  box-shadow:10px 10px 0 rgba(13,51,44,.9);
  position:relative;
  overflow:hidden;
}
.cta-banner::before{
  content:'';
  position:absolute;
  inset:0;
  background-image:
    linear-gradient(rgba(255,255,255,.16) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.16) 1px, transparent 1px);
  background-size:46px 46px;
  -webkit-mask-image:radial-gradient(circle at 50% 50%, #000, transparent 78%);
  mask-image:radial-gradient(circle at 50% 50%, #000, transparent 78%);
  pointer-events:none;
}

.cta-banner h2 {
  color:#fff8f4;
  font-size:clamp(1.5rem, 3vw, 2.15rem);
  font-weight:800;
  letter-spacing:-.028em;
  line-height:1.28;
  margin-bottom:14px;
  position:relative;
}

.cta-banner p{
  position:relative;
  opacity:.92;
  max-width:520px;
  margin:0 auto 30px;
  font-size:1rem;
  line-height:1.75;
}

.cta-banner .btn-primary {
  background:#fff8f4;
  color:var(--ink);
  box-shadow:5px 5px 0 rgba(13,51,44,.85);
  position:relative;
}
.cta-banner .btn-primary:hover{
  background:var(--ink);
  color:#fff8f4;
  box-shadow:7px 7px 0 rgba(255,255,255,.6);
}

/* ============ 页脚 ============ */
.site-footer {
  padding:60px 0 30px;
  background:var(--paper-2);
  border-top:1.5px solid var(--ink-14);
  color:var(--ink);
}
.site-footer .container { }

.footer-grid {
  display:grid;
  grid-template-columns:2fr 1fr 1fr 1fr;
  gap:40px;
}

.footer-brand { }
.footer-brand .logo{ margin-bottom:16px; }
.footer-brand p{
  font-size:.9rem;
  color:var(--ink-soft);
  opacity:.76;
  line-height:1.8;
  max-width:300px;
}

.footer-col { }

.footer-col h4{
  font-size:.78rem;
  font-weight:700;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--coral);
  margin-bottom:16px;
}

.footer-col ul{ list-style:none; }
.footer-col li{ margin-bottom:9px; }
.footer-col a{
  font-size:.9rem;
  color:var(--ink-soft);
  text-decoration:none;
  transition:color .2s var(--ease), padding-left .2s var(--ease);
}
.footer-col a:hover{
  color:var(--coral);
  padding-left:5px;
}

.footer-bottom {
  border-top:1px solid var(--ink-14);
  margin-top:44px;
  padding-top:22px;
  text-align:center;
  font-size:.85rem;
  color:var(--ink-soft);
  opacity:.72;
  letter-spacing:.02em;
}

/* ============ 工具类 ============ */
.text-accent { color:var(--coral); }
.text-center { text-align:center; }

.seo-description {
  max-width:600px;
  margin:0 auto 48px;
  color:var(--ink-soft);
  opacity:.78;
  line-height:1.8;
}

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

/* ============ 响应式 ============ */
@media (max-width: 768px) {
  .hero{ padding:112px 0 68px; }
  .section{ padding:62px 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:34px; }
  .cta-banner{ padding:48px 24px; box-shadow:7px 7px 0 rgba(13,51,44,.9); }

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

  .main-nav.open {
    display:flex;
    flex-direction:column;
    align-items:flex-start;
    gap:6px;
    position:absolute;
    top:68px;
    left:0;
    width:100%;
    background:var(--paper-3);
    padding:20px 24px 26px;
    border-bottom:1.5px solid var(--ink-14);
    box-shadow:0 14px 26px rgba(13,51,44,.08);
  }
  .main-nav.open li{ width:100%; }
  .main-nav.open a{
    display:block;
    width:100%;
    padding:11px 0;
    border-bottom:1px dashed var(--ink-08);
    font-size:1rem;
  }
  .main-nav.open .nav-cta{
    margin-top:14px;
    text-align:center;
    border-bottom:none;
    padding:12px 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; align-items:stretch; }
  .hero-buttons .btn{ width:100%; }
  .cta-banner{ border-radius:18px 18px 18px 5px; }
  .section-title{ letter-spacing:-.02em; }
}