/* ============================================================
   宸漫纪元 · AIGC数字影视  官网样式
   配色源自招商方案：紫 #6136BA / 深蓝 #243B5C / 青 #4CC9F0 / 金 #FFD700
   ============================================================ */
:root{
  --primary:#6136BA;
  --primary-2:#6344AD;
  --primary-3:#6B63D3;
  --primary-soft:#EFE9FC;
  --navy:#243B5C;
  --navy-2:#1A3A5C;
  --navy-3:#0F2237;
  --cyan:#4CC9F0;
  --gold:#E8B31A;
  --gold-bright:#FFD700;
  --green:#00A97F;
  --ink:#1E2430;
  --muted:#5C6575;
  --line:#E5E8F0;
  --bg:#F6F7FC;
  --white:#FFFFFF;
  --radius:16px;
  --shadow:0 10px 30px rgba(38,27,92,.08);
  --shadow-lg:0 24px 60px rgba(38,27,92,.14);
  --maxw:1180px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:"MiSans","PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Segoe UI",sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(255,255,255,.92);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:72px}
.brand{display:flex;align-items:center;gap:12px}
.brand-mark{
  width:42px;height:42px;border-radius:12px;flex:none;
  background:linear-gradient(135deg,var(--primary) 0%,var(--primary-3) 100%);
  color:#fff;display:flex;align-items:center;justify-content:center;
  font-weight:800;font-size:19px;letter-spacing:1px;
  box-shadow:0 6px 16px rgba(97,54,186,.35);
}
.brand-text b{display:block;font-size:18px;letter-spacing:2px;color:var(--ink)}
.brand-text span{display:block;font-size:10.5px;letter-spacing:.6px;color:var(--muted)}
.main-nav{display:flex;align-items:center;gap:4px}
.main-nav a{
  padding:9px 15px;border-radius:10px;font-size:15px;color:#3A4252;
  transition:.2s;font-weight:500;
}
.main-nav a:hover{color:var(--primary);background:var(--primary-soft)}
.main-nav a.active{color:var(--primary);font-weight:700;background:var(--primary-soft)}
.nav-cta{
  margin-left:10px;background:linear-gradient(135deg,var(--primary),#7A4FD6);
  color:#fff !important;padding:10px 20px !important;border-radius:999px !important;
  box-shadow:0 8px 20px rgba(97,54,186,.3);font-weight:600 !important;
}
.nav-cta:hover{transform:translateY(-1px);box-shadow:0 12px 26px rgba(97,54,186,.4)}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;padding:8px}
.nav-toggle span{display:block;width:22px;height:2px;background:var(--ink);margin:5px 0;border-radius:2px;transition:.25s}

/* ---------- Hero ---------- */
.hero{
  position:relative;overflow:hidden;
  background:linear-gradient(180deg,#FBFAFF 0%,#F2EEFC 55%,#F6F7FC 100%);
}
.hero-bg{
  position:absolute;inset:0;width:100%;height:100%;object-fit:cover;
  opacity:.9;pointer-events:none;
}
.hero-inner{position:relative;padding:96px 0 84px;max-width:760px}
.hero-tag{
  display:inline-flex;align-items:center;gap:8px;
  background:rgba(97,54,186,.08);color:var(--primary);
  border:1px solid rgba(97,54,186,.22);
  padding:6px 16px;border-radius:999px;font-size:13.5px;font-weight:600;letter-spacing:1px;
}
.hero h1{
  margin:22px 0 14px;font-size:52px;line-height:1.18;letter-spacing:1px;
  font-weight:800;color:var(--ink);
}
.hero h1 .grad{
  background:linear-gradient(100deg,var(--primary) 10%,#8E5BE8 55%,var(--cyan) 110%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero .sub{font-size:19px;color:var(--muted);max-width:620px}
.hero-actions{display:flex;gap:14px;margin-top:34px;flex-wrap:wrap}
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:13px 30px;border-radius:999px;font-size:16px;font-weight:600;
  transition:.22s;cursor:pointer;border:1px solid transparent;
}
.btn-primary{
  background:linear-gradient(135deg,var(--primary),#7B4BD8);color:#fff;
  box-shadow:0 10px 26px rgba(97,54,186,.34);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 34px rgba(97,54,186,.42)}
.btn-ghost{border-color:#C9C3E4;color:var(--primary);background:rgba(255,255,255,.7)}
.btn-ghost:hover{background:var(--primary-soft)}
.hero-stats{display:flex;gap:14px;margin-top:52px;flex-wrap:wrap}
.stat-chip{
  background:rgba(255,255,255,.85);border:1px solid var(--line);
  border-radius:14px;padding:16px 22px;min-width:150px;
  box-shadow:var(--shadow);
}
.stat-chip b{display:block;font-size:27px;font-weight:800;color:var(--primary);line-height:1.25}
.stat-chip span{font-size:13px;color:var(--muted)}

/* ---------- 通用区块 ---------- */
.section{padding:86px 0}
.section.alt{background:var(--white)}
.section-head{max-width:780px;margin:0 auto 52px;text-align:center}
.eyebrow{
  display:inline-block;color:var(--primary);font-size:13px;font-weight:700;
  letter-spacing:3px;margin-bottom:12px;text-transform:uppercase;
}
.section-head h2{font-size:36px;font-weight:800;letter-spacing:1px;line-height:1.3}
.section-head p{margin-top:14px;color:var(--muted);font-size:16.5px}
.sec-bar{width:56px;height:4px;border-radius:4px;margin:20px auto 0;
  background:linear-gradient(90deg,var(--primary),var(--cyan))}

/* 卡片 */
.grid{display:grid;gap:22px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
.card{
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius);
  padding:30px 28px;box-shadow:var(--shadow);transition:.25s;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:#D6CBF2}
.card h3{font-size:19.5px;margin-bottom:10px;font-weight:700}
.card p{color:var(--muted);font-size:14.8px}
.icon-badge{
  width:52px;height:52px;border-radius:14px;display:flex;align-items:center;justify-content:center;
  font-size:24px;margin-bottom:18px;
  background:var(--primary-soft);color:var(--primary);
}
.icon-badge.navy{background:#E7EEF7;color:var(--navy)}
.icon-badge.cyan{background:#E3F6FD;color:#0E86B8}
.icon-badge.gold{background:#FDF4DC;color:var(--gold)}
.num{
  font-size:13px;font-weight:800;color:var(--primary);letter-spacing:2px;
  display:inline-block;margin-bottom:10px;
}

/* 数据大字 */
.big-num{font-size:40px;font-weight:800;color:var(--primary);line-height:1.2}
.big-num small{font-size:16px;font-weight:600;color:var(--muted);margin-left:4px}
.stat-label{color:var(--muted);font-size:14px;margin-top:4px}

/* 深色横幅 */
.dark-band{
  background:linear-gradient(120deg,var(--navy-3) 0%,var(--navy) 55%,#3A2A73 100%);
  color:#fff;border-radius:22px;padding:56px 54px;position:relative;overflow:hidden;
}
.dark-band h3{font-size:27px;font-weight:800;margin-bottom:12px}
.dark-band p{color:#C8D4E0;font-size:16px;max-width:680px}
.dark-band .gold{color:var(--gold-bright)}
.dark-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:34px}
.dark-cell{
  background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.14);
  border-radius:14px;padding:22px 20px;
}
.dark-cell b{display:block;font-size:26px;font-weight:800;color:var(--gold-bright)}
.dark-cell span{font-size:13.5px;color:#C8D4E0}

/* 图片卡 */
.media-card{
  border-radius:var(--radius);overflow:hidden;background:var(--white);
  border:1px solid var(--line);box-shadow:var(--shadow);transition:.25s;
}
.media-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.media-card .pic{height:210px;overflow:hidden;background:#EDEBF6}
.media-card .pic img{width:100%;height:100%;object-fit:cover;transition:.5s}
.media-card:hover .pic img{transform:scale(1.05)}
.media-card .body{padding:24px 24px 26px}
.media-card h3{font-size:18.5px;font-weight:700;margin-bottom:8px}
.media-card p{font-size:14.5px;color:var(--muted)}

/* 表格 */
.table-wrap{overflow-x:auto;border-radius:var(--radius);box-shadow:var(--shadow);border:1px solid var(--line);background:#fff}
table.compare{width:100%;border-collapse:collapse;min-width:720px}
table.compare th{
  background:var(--navy);color:#fff;font-size:16px;padding:16px 18px;text-align:left;font-weight:700;
}
table.compare th.ai{color:var(--cyan)}
table.compare th.adv{color:var(--gold-bright)}
table.compare td{padding:15px 18px;border-top:1px solid var(--line);font-size:15px;vertical-align:middle}
table.compare td.k{font-weight:700;color:var(--primary);font-size:14.5px;background:#FAF9FE}
table.compare td.old{color:#7A8296}
table.compare td.ai{color:#0E86B8;font-weight:600}
table.compare td.adv{color:var(--green);font-weight:700;white-space:nowrap}

/* 时间轴 / 步骤 */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;position:relative}
.step{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:28px 24px;box-shadow:var(--shadow);position:relative;
}
.step .no{
  width:38px;height:38px;border-radius:50%;background:linear-gradient(135deg,var(--primary),#7B4BD8);
  color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;margin-bottom:16px;
}
.step h4{font-size:17.5px;margin-bottom:8px}
.step p{font-size:14.3px;color:var(--muted)}
.step .tip{display:inline-block;margin-top:12px;font-size:12.5px;color:var(--primary);
  background:var(--primary-soft);border-radius:8px;padding:4px 10px;font-weight:600}

/* 引用判断条 */
.verdict{
  margin-top:26px;background:var(--navy);color:#D4C8FF;border-radius:14px;
  padding:18px 24px;display:flex;align-items:center;gap:14px;font-size:15.5px;
}
.verdict .tag{
  background:rgba(212,200,255,.15);border:1px solid rgba(212,200,255,.3);
  color:#fff;border-radius:8px;padding:3px 12px;font-size:13px;font-weight:700;flex:none;
}

/* 列表 */
.tick-list li{position:relative;padding-left:26px;margin-bottom:9px;color:var(--muted);font-size:14.8px}
.tick-list li::before{
  content:"✓";position:absolute;left:0;top:0;color:var(--primary);font-weight:800;
}
.tick-list.gold li::before{content:"✦";color:var(--gold)}

/* CTA */
.cta-band{
  background:linear-gradient(115deg,var(--primary) 0%,#7A4BD8 55%,#4B3FA8 100%);
  border-radius:24px;color:#fff;padding:64px 56px;text-align:center;
  position:relative;overflow:hidden;
}
.cta-band::after{
  content:"";position:absolute;right:-80px;top:-80px;width:300px;height:300px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,255,255,.18),transparent 70%);
}
.cta-band h2{font-size:34px;font-weight:800;margin-bottom:14px}
.cta-band p{color:#E4DCFB;font-size:17px;margin-bottom:30px}
.cta-band .btn{background:#fff;color:var(--primary)}

/* 页脚 */
.site-footer{background:var(--navy-3);color:#9FB0C4;margin-top:90px}
.footer-top{
  display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;
  padding:60px 0 44px;
}
.site-footer h4{color:#fff;font-size:15.5px;margin-bottom:18px;letter-spacing:1px}
.site-footer a:hover{color:#fff}
.site-footer li{margin-bottom:10px;font-size:14px}
.footer-brand p{font-size:14px;margin-top:14px;max-width:300px;line-height:1.8}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.09);padding:20px 0;font-size:13px;
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;
}
.f-logo{display:flex;align-items:center;gap:12px}
.f-logo .brand-mark{box-shadow:none}

/* 章节页头（子页面顶部） */
.page-hero{
  background:linear-gradient(120deg,#1B1533 0%,var(--primary-2) 55%,#3E2E86 100%);
  color:#fff;padding:76px 0 70px;position:relative;overflow:hidden;
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background:radial-gradient(700px 300px at 85% 15%,rgba(76,201,240,.22),transparent 65%);
}
.page-hero .inner{position:relative}
.page-hero .chap{font-size:13px;letter-spacing:4px;color:#B9A8F0;font-weight:700}
.page-hero h1{font-size:42px;font-weight:800;margin:12px 0 16px}
.page-hero p{color:#D6CEF5;font-size:17px;max-width:660px}
.crumbs{font-size:13.5px;color:#8E97AB;margin-bottom:26px}
.crumbs a{color:#8E97AB}
.crumbs a:hover{color:#fff}

/* 两栏图文 */
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.split .pic{border-radius:20px;overflow:hidden;box-shadow:var(--shadow-lg)}
.split .pic img{width:100%;height:100%;object-fit:cover}
.split h2{font-size:30px;font-weight:800;margin-bottom:16px}
.split p{color:var(--muted);margin-bottom:14px;font-size:15.5px}

/* 徽标墙 */
.badges{display:flex;flex-wrap:wrap;gap:12px}
.badge{
  background:#fff;border:1px solid var(--line);border-radius:999px;
  padding:9px 18px;font-size:14px;color:#3A4252;font-weight:600;box-shadow:var(--shadow);
}

/* 滚动淡入 */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion: reduce){.reveal{opacity:1;transform:none;transition:none}}

/* 响应式 */
@media (max-width:980px){
  .g4{grid-template-columns:repeat(2,1fr)}
  .g3{grid-template-columns:repeat(2,1fr)}
  .split{grid-template-columns:1fr;gap:30px}
  .steps{grid-template-columns:repeat(2,1fr)}
  .dark-grid{grid-template-columns:repeat(2,1fr)}
  .footer-top{grid-template-columns:1fr 1fr}
  .hero h1{font-size:40px}
  .page-hero h1{font-size:33px}
}
@media (max-width:680px){
  .main-nav{
    position:fixed;top:72px;right:0;left:0;background:#fff;flex-direction:column;
    align-items:stretch;padding:14px 20px 20px;gap:4px;border-bottom:1px solid var(--line);
    box-shadow:0 20px 40px rgba(30,20,70,.12);
    transform:translateY(-130%);transition:.3s;z-index:99;
  }
  .main-nav.open{transform:translateY(0)}
  .nav-toggle{display:block}
  .g2,.g3,.g4{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .dark-grid{grid-template-columns:1fr}
  .footer-top{grid-template-columns:1fr}
  .hero-inner{padding:64px 0 56px}
  .hero h1{font-size:31px}
  .section{padding:60px 0}
  .section-head h2{font-size:26px}
  .dark-band,.cta-band{padding:38px 26px}
  .cta-band h2,.dark-band h3{font-size:23px}
}