/* ===== AI生图 免费图片生成器 - 全站样式（蓝色高端风）===== */
:root{
  --blue-900:#0a1c4e;
  --blue-800:#0f2a7d;
  --blue-700:#1339b8;
  --blue-600:#1d4ed8;
  --blue-500:#2f6bff;
  --blue-400:#5b8cff;
  --blue-100:#e6eeff;
  --blue-50:#f3f7ff;
  --ink:#182236;
  --ink-soft:#4a5a78;
  --line:#e3eaf6;
  --bg:#ffffff;
  --radius:14px;
  --shadow:0 10px 30px rgba(19,57,184,.10);
  --header-h:64px;
}
*{margin:0;padding:0;box-sizing:border-box}
/* Vue 挂载前隐藏待渲染版块，防止 {{}} 闪烁 */
[v-cloak]{display:none !important}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC","Source Han Sans SC","Helvetica Neue",Arial,sans-serif;
  color:var(--ink);background:var(--bg);
  line-height:1.7;font-size:16px;
  padding-top:var(--header-h);
  overflow-x:hidden;
}
img,svg{max-width:100%;height:auto;display:block}
a{color:var(--blue-600);text-decoration:none;transition:color .2s}
a:hover{color:var(--blue-800)}
.container{width:min(1160px,92%);margin:0 auto}

/* ===== 顶部导航（下滑隐藏 / 上滑显示）===== */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  height:var(--header-h);
  background:rgba(255,255,255,.92);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
  transform:translateY(0);
  transition:transform .35s ease,box-shadow .35s ease;
}
.site-header.is-hidden{transform:translateY(-110%)}
.site-header.is-scrolled{box-shadow:0 6px 20px rgba(10,28,78,.08)}
.header-inner{height:var(--header-h);display:flex;align-items:center;justify-content:space-between;gap:16px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;color:var(--blue-800);white-space:nowrap}
.logo-mark{width:34px;height:34px;border-radius:9px;flex:none;
  background:linear-gradient(135deg,var(--blue-500),var(--blue-700));
  display:flex;align-items:center;justify-content:center;color:#fff;font-size:16px;font-weight:800}
.nav{display:flex;align-items:center;gap:4px}
.nav a{padding:8px 13px;border-radius:8px;font-size:15px;color:var(--ink-soft);white-space:nowrap}
.nav a:hover{color:var(--blue-600);background:var(--blue-50)}
.nav a.active,.nav a.router-link-active{color:var(--blue-600);font-weight:600;background:var(--blue-50)}
.nav-cta{margin-left:8px;padding:9px 18px !important;border-radius:22px !important;
  background:linear-gradient(135deg,var(--blue-500),var(--blue-700)) !important;
  color:#fff !important;font-weight:600;box-shadow:0 6px 16px rgba(29,78,216,.28)}
.nav-cta:hover{filter:brightness(1.08)}
.menu-btn{display:none;width:42px;height:42px;border:1px solid var(--line);background:#fff;border-radius:10px;
  cursor:pointer;flex-direction:column;align-items:center;justify-content:center;gap:5px}
.menu-btn span{display:block;width:20px;height:2px;background:var(--blue-700);border-radius:2px;transition:transform .3s,opacity .3s}
.menu-btn.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.menu-btn.open span:nth-child(2){opacity:0}
.menu-btn.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.mobile-nav{display:none}

/* ===== 首屏 Hero ===== */
.hero{
  position:relative;overflow:hidden;color:#fff;
  background:linear-gradient(128deg,#0a1c4e 0%,#1339b8 48%,#2f6bff 100%);
  padding:72px 0 88px;
}
.hero::before{content:"";position:absolute;inset:0;
  background:radial-gradient(600px 300px at 85% 10%,rgba(255,255,255,.14),transparent 60%),
             radial-gradient(500px 260px at 8% 90%,rgba(91,140,255,.35),transparent 60%);pointer-events:none}
.hero-inner{position:relative;display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center}
.hero-tag{display:inline-block;padding:5px 14px;border-radius:20px;font-size:13px;letter-spacing:1px;
  background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.25);margin-bottom:18px}
.hero h1{font-size:clamp(26px,4vw,42px);line-height:1.3;font-weight:800;margin-bottom:16px}
.hero h1 em{font-style:normal;background:linear-gradient(90deg,#9db9ff,#fff);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.lead{font-size:17px;color:#ccdaff;max-width:560px;margin-bottom:28px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 28px;border-radius:28px;font-size:16px;font-weight:600;cursor:pointer;border:none;transition:transform .2s,box-shadow .2s,filter .2s}
.btn:active{transform:scale(.97)}
.btn-primary{background:#fff;color:var(--blue-700);box-shadow:0 8px 24px rgba(0,0,0,.18)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 30px rgba(0,0,0,.24);color:var(--blue-800)}
.btn-ghost{background:rgba(255,255,255,.12);color:#fff;border:1px solid rgba(255,255,255,.4)}
.btn-ghost:hover{background:rgba(255,255,255,.2);color:#fff}
.btn-blue{background:linear-gradient(135deg,var(--blue-500),var(--blue-700));color:#fff;box-shadow:0 8px 22px rgba(29,78,216,.30)}
.btn-blue:hover{transform:translateY(-2px);filter:brightness(1.06);color:#fff}
.hero-figure{border-radius:18px;overflow:hidden;box-shadow:0 24px 60px rgba(4,12,40,.45);transform:rotate(1.5deg)}
.hero-meta{display:flex;gap:26px;margin-top:26px;flex-wrap:wrap}
.hero-meta span{font-size:14px;color:#b9ccff;display:inline-flex;align-items:center;gap:6px}
.hero-meta b{color:#fff}

/* ===== 通用版块 ===== */
.section{padding:72px 0}
.section.alt{background:var(--blue-50)}
.section-head{text-align:center;max-width:720px;margin:0 auto 44px}
.section-head .kicker{display:inline-block;font-size:13px;letter-spacing:2px;color:var(--blue-600);font-weight:700;margin-bottom:10px;text-transform:uppercase}
.section-head h2{font-size:clamp(22px,3vw,30px);font-weight:800;color:var(--blue-900);margin-bottom:12px}
.section-head p{color:var(--ink-soft)}
.grid{display:grid;gap:22px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px 24px;box-shadow:var(--shadow);transition:transform .25s,box-shadow .25s}
.card:hover{transform:translateY(-4px);box-shadow:0 16px 40px rgba(19,57,184,.14)}
.card .ico{width:46px;height:46px;border-radius:12px;background:linear-gradient(135deg,var(--blue-100),#fff);
  border:1px solid var(--blue-100);display:flex;align-items:center;justify-content:center;font-size:22px;margin-bottom:16px}
.card h3{font-size:18px;color:var(--blue-900);margin-bottom:8px}
.card p{font-size:14.5px;color:var(--ink-soft)}
.card a.more{display:inline-block;margin-top:12px;font-size:14px;font-weight:600}

/* 步骤 */
.steps{counter-reset:step}
.step{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px 24px 26px;box-shadow:var(--shadow)}
.step::before{counter-increment:step;content:counter(step);
  position:absolute;top:-16px;left:24px;width:34px;height:34px;border-radius:50%;
  background:linear-gradient(135deg,var(--blue-500),var(--blue-700));color:#fff;font-weight:800;
  display:flex;align-items:center;justify-content:center;font-size:16px;box-shadow:0 6px 14px rgba(29,78,216,.35)}
.step h3{font-size:17px;color:var(--blue-900);margin-bottom:8px;margin-top:4px}
.step p{font-size:14.5px;color:var(--ink-soft)}

/* 图文 */
.split{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center}
.split.rev .split-media{order:2}
.split h2{font-size:clamp(20px,2.6vw,26px);color:var(--blue-900);margin-bottom:14px}
.split p{color:var(--ink-soft);margin-bottom:12px}
.split ul{list-style:none;margin-top:6px}
.split ul li{padding-left:26px;position:relative;margin-bottom:10px;color:var(--ink-soft);font-size:15px}
.split ul li::before{content:"";position:absolute;left:0;top:9px;width:14px;height:14px;border-radius:4px;
  background:linear-gradient(135deg,var(--blue-400),var(--blue-700))}
.split-media{border-radius:16px;overflow:hidden;box-shadow:0 16px 44px rgba(19,57,184,.16);border:1px solid var(--line)}
figure.fig{margin:0}
figure.fig figcaption{font-size:13px;color:#7c8db0;text-align:center;padding:10px 6px 4px;background:#fff}

/* 表格（提示词页等）*/
.table-wrap{overflow-x:auto;border-radius:var(--radius);border:1px solid var(--line);box-shadow:var(--shadow);background:#fff}
table{width:100%;border-collapse:collapse;font-size:14.5px;min-width:560px}
th{background:var(--blue-800);color:#fff;text-align:left;padding:13px 16px;font-weight:600;white-space:nowrap}
td{padding:12px 16px;border-top:1px solid var(--line);color:var(--ink-soft);vertical-align:top}
tbody tr:nth-child(even){background:var(--blue-50)}
td b{color:var(--blue-800)}

/* FAQ */
.faq-list{max-width:820px;margin:0 auto;display:grid;gap:14px}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;box-shadow:var(--shadow)}
.faq-item h3{margin:0}
.faq-q{width:100%;text-align:left;background:none;border:none;cursor:pointer;
  padding:18px 52px 18px 20px;font-size:16px;font-weight:600;color:var(--blue-900);
  position:relative;font-family:inherit;line-height:1.5}
.faq-q::after{content:"+";position:absolute;right:20px;top:50%;transform:translateY(-50%);
  font-size:22px;color:var(--blue-500);font-weight:400;transition:transform .3s}
.faq-q[aria-expanded="true"]::after{transform:translateY(-50%) rotate(45deg)}
.faq-a{padding:0 20px 18px;color:var(--ink-soft);font-size:15px;border-top:1px dashed var(--line);margin:0 20px;padding-left:0;padding-right:0;padding-top:14px}

/* CTA 条 */
.cta-band{background:linear-gradient(120deg,#0a1c4e,#1339b8 55%,#2f6bff);border-radius:20px;
  color:#fff;padding:52px 40px;text-align:center;position:relative;overflow:hidden}
.cta-band::before{content:"";position:absolute;inset:0;background:radial-gradient(420px 200px at 80% 20%,rgba(255,255,255,.16),transparent 60%)}
.cta-band h2{font-size:clamp(20px,3vw,28px);margin-bottom:12px;position:relative}
.cta-band p{color:#c6d6ff;margin-bottom:24px;position:relative}
.cta-band .btn{position:relative}

/* 面包屑 */
.crumbs{font-size:13px;color:#8a99b8;padding:16px 0 0}
.crumbs a{color:#8a99b8}
.crumbs a:hover{color:var(--blue-600)}
.crumbs span{margin:0 6px}

/* 页头（内页）*/
.page-hero{background:linear-gradient(128deg,#0a1c4e 0%,#1339b8 52%,#2f6bff 100%);color:#fff;padding:56px 0 60px;position:relative;overflow:hidden}
.page-hero::before{content:"";position:absolute;inset:0;background:radial-gradient(560px 280px at 88% 12%,rgba(255,255,255,.13),transparent 60%)}
.page-hero .container{position:relative}
.page-hero .kicker{display:inline-block;padding:4px 13px;border-radius:18px;font-size:13px;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.25);margin-bottom:14px}
.page-hero h1{font-size:clamp(23px,3.4vw,34px);font-weight:800;line-height:1.35;max-width:820px}
.page-hero p{color:#c9d8ff;margin-top:12px;max-width:700px;font-size:16px}

/* ===== 页脚 ===== */
.site-footer{background:var(--blue-900);color:#9fb2dd;padding:56px 0 30px;margin-top:20px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:40px;margin-bottom:36px}
.site-footer h4{color:#fff;font-size:16px;margin-bottom:16px}
.site-footer ul{list-style:none}
.site-footer li{margin-bottom:10px}
.site-footer a{color:#9fb2dd;font-size:14px}
.site-footer a:hover{color:#fff}
.footer-brand p{font-size:14px;line-height:1.8;margin-top:12px;max-width:340px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding-top:22px;font-size:13px;color:#6f83b6;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}

/* ===== 响应式 ===== */
@media (max-width:960px){
  .hero-inner{grid-template-columns:1fr;gap:36px}
  .hero-figure{transform:none;max-width:560px}
  .grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}
  .split{grid-template-columns:1fr;gap:28px}
  .split.rev .split-media{order:0}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:768px){
  .nav{position:fixed;top:var(--header-h);left:0;right:0;flex-direction:column;align-items:stretch;
    background:#fff;border-bottom:1px solid var(--line);box-shadow:0 18px 40px rgba(10,28,78,.12);
    padding:12px 5%;gap:2px;max-height:calc(100vh - var(--header-h));overflow-y:auto;
    transform:translateY(-130%);transition:transform .32s ease;z-index:99}
  .nav.open{transform:translateY(0)}
  .nav a{padding:13px 10px;border-radius:10px;font-size:16px}
  .nav a.active{background:var(--blue-50)}
  .nav-cta{margin:8px 0 6px;text-align:center;justify-content:center}
  .menu-btn{display:flex}
  body{font-size:15px}
  .section{padding:52px 0}
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
  .hero{padding:48px 0 60px}
  .cta-band{padding:40px 22px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;scroll-behavior:auto}
}