/* ===== 腾龙游戏官网 样式表 ===== */
:root{
  --bg:#070b1a;
  --bg-2:#0c1226;
  --panel:rgba(18,26,52,.72);
  --line:rgba(120,150,255,.16);
  --gold:#e9b872;
  --gold-2:#ffd08a;
  --cyan:#5ee6e6;
  --blue:#3d7bff;
  --txt:#eaf0ff;
  --txt-2:#aab4d4;
  --radius:18px;
  --shadow:0 20px 50px rgba(0,0,0,.45);
  --t:all .4s cubic-bezier(.2,.7,.3,1);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:"PingFang SC","Microsoft YaHei","WenQuanYi Micro Hei",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
  background:var(--bg);
  color:var(--txt);
  line-height:1.75;
  overflow-x:hidden;
  font-size:16px;
}
a{color:inherit;text-decoration:none}
ul{list-style:none}
img{max-width:100%;display:block}
.container{width:min(1200px,92vw);margin:0 auto}

/* 背景光效 */
.aurora{position:fixed;inset:0;z-index:-2;overflow:hidden;pointer-events:none}
.aurora i{position:absolute;border-radius:50%;filter:blur(90px);opacity:.5;animation:float 18s ease-in-out infinite alternate}
.aurora i:nth-child(1){width:46vw;height:46vw;left:-12vw;top:-10vw;background:#1b3bff}
.aurora i:nth-child(2){width:38vw;height:38vw;right:-10vw;top:12vw;background:#7b2bff;animation-delay:-6s}
.aurora i:nth-child(3){width:34vw;height:34vw;left:20vw;bottom:-12vw;background:#0e7f86;animation-delay:-11s}
@keyframes float{to{transform:translate3d(4vw,-3vw,0) scale(1.12)}}

/* ===== 顶部导航 ===== */
.header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  background:linear-gradient(180deg,rgba(7,11,26,.85),rgba(7,11,26,.4));
  border-bottom:1px solid transparent;
  transition:var(--t);
}
.header.scrolled{border-bottom-color:var(--line);background:rgba(7,11,26,.9)}
.nav{display:flex;align-items:center;gap:2rem;height:74px}
.logo{display:flex;align-items:center;gap:.65rem;font-weight:800;letter-spacing:.5px;font-size:1.25rem}
.logo-mark{
  width:38px;height:38px;border-radius:11px;flex:none;
  background:
    radial-gradient(circle at 50% 38%,var(--gold-2) 0 12%,transparent 13%),
    conic-gradient(from 0deg,#e9b872,#5ee6e6,#3d7bff,#e9b872);
  box-shadow:0 0 22px rgba(233,184,114,.45);
  position:relative;
}
.logo-mark::after{content:"";position:absolute;inset:4px;border-radius:8px;background:var(--bg);}
.logo-mark span{position:absolute;inset:0;display:grid;place-items:center;font-size:16px;z-index:2}
.nav-links{display:flex;gap:1.6rem;margin-left:auto;align-items:center}
.nav-links a{font-size:.95rem;color:var(--txt-2);position:relative;padding:.25rem 0;transition:var(--t)}
.nav-links a:hover{color:var(--txt)}
.nav-links a::after{content:"";position:absolute;left:0;bottom:0;width:0;height:2px;background:linear-gradient(90deg,var(--gold),var(--cyan));transition:var(--t)}
.nav-links a:hover::after{width:100%}
.nav-cta{
  padding:.6rem 1.3rem;border-radius:999px;font-weight:700;font-size:.9rem;
  background:linear-gradient(100deg,var(--gold),var(--gold-2));color:#201505;
  box-shadow:0 8px 24px rgba(233,184,114,.35);
  transition:var(--t);
}
.nav-cta:hover{transform:translateY(-2px);box-shadow:0 12px 30px rgba(233,184,114,.5)}
.menu-btn{display:none;width:44px;height:44px;flex-direction:column;justify-content:center;align-items:center;gap:5px;cursor:pointer}
.menu-btn b{width:22px;height:2px;background:var(--txt);border-radius:2px;transition:var(--t)}

/* ===== 横幅 ===== */
.hero{position:relative;min-height:100vh;display:grid;place-items:center;padding:120px 0 80px}
.hero-img{position:absolute;inset:0;z-index:-1}
.hero-img img{width:100%;height:100%;object-fit:cover;object-position:50% 50%}
.hero-img::after{
  content:"";position:absolute;inset:0;
  background:radial-gradient(ellipse at 50% 45%,rgba(7,11,26,.35) 0%,rgba(7,11,26,.82) 70%,#070b1a 100%);
}
.hero-inner{text-align:center;padding:0 1rem;max-width:900px}
.hero-badge{
  display:inline-flex;align-items:center;gap:.6rem;
  padding:.5rem 1.2rem;border-radius:999px;font-size:.85rem;letter-spacing:2px;
  color:var(--gold-2);
  background:rgba(233,184,114,.1);border:1px solid rgba(233,184,114,.35);
  margin-bottom:1.6rem;
}
.hero h1{
  font-size:clamp(2.4rem,6vw,4.6rem);line-height:1.15;font-weight:800;letter-spacing:1px;
  background:linear-gradient(100deg,#fff 10%,var(--gold-2) 55%,var(--cyan) 95%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero h1 em{font-style:normal;color:var(--gold-2);-webkit-text-fill-color:var(--gold-2)}
.hero p{margin:1.3rem auto 2.4rem;max-width:640px;color:var(--txt-2);font-size:clamp(1rem,1.6vw,1.15rem)}
.hero-actions{display:flex;gap:1.1rem;justify-content:center;flex-wrap:wrap}
.btn{
  position:relative;display:inline-flex;align-items:center;gap:.6rem;
  padding:1.05rem 2.4rem;border-radius:14px;font-size:1.12rem;font-weight:800;letter-spacing:1px;
  cursor:pointer;border:0;transition:var(--t);
}
.btn-primary{
  color:#1a1206;
  background:linear-gradient(110deg,var(--gold) 0%,var(--gold-2) 55%,#fff2cf 100%);
  box-shadow:0 14px 34px rgba(233,184,114,.5),0 0 0 1px rgba(255,224,170,.6) inset;
}
.btn-primary:hover{transform:translateY(-4px) scale(1.03);box-shadow:0 22px 44px rgba(233,184,114,.65),0 0 26px rgba(255,224,170,.35)}
.btn-ghost{
  color:#fff;
  background:rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.28);
  backdrop-filter:blur(6px);
}
.btn-ghost:hover{transform:translateY(-4px);background:rgba(255,255,255,.14);border-color:var(--cyan);color:var(--cyan)}
.btn svg{width:20px;height:20px;fill:currentColor;flex:none}
.hero-meta{margin-top:3rem;display:flex;gap:2.5rem;justify-content:center;flex-wrap:wrap;color:var(--txt-2);font-size:.9rem}
.hero-meta b{display:block;color:#fff;font-size:1.5rem;font-weight:800;letter-spacing:.5px}

/* ===== 通用区块 ===== */
section{padding:90px 0;position:relative}
.sec-head{text-align:center;margin-bottom:3.2rem}
.sec-tag{color:var(--gold);letter-spacing:3px;font-size:.82rem;font-weight:700}
.sec-head h2{font-size:clamp(1.8rem,3.6vw,2.8rem);font-weight:800;margin:.5rem 0;letter-spacing:.5px}
.sec-head p{color:var(--txt-2);max-width:620px;margin:0 auto}

/* 数据条 */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:1.2rem;margin-top:-60px;position:relative;z-index:5}
.stat{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:1.8rem 1.2rem;text-align:center;backdrop-filter:blur(10px);
  box-shadow:var(--shadow);
}
.stat b{display:block;font-size:2.2rem;font-weight:800;background:linear-gradient(100deg,var(--gold-2),var(--cyan));-webkit-background-clip:text;background-clip:text;color:transparent}
.stat span{color:var(--txt-2);font-size:.9rem}

/* 特性 */
.features{display:grid;grid-template-columns:repeat(3,1fr);gap:1.6rem}
.card{
  background:linear-gradient(180deg,rgba(30,40,74,.6),rgba(14,20,42,.6));
  border:1px solid var(--line);border-radius:var(--radius);padding:2rem;
  transition:var(--t);position:relative;overflow:hidden;
}
.card::before{content:"";position:absolute;right:-40px;top:-40px;width:140px;height:140px;border-radius:50%;background:radial-gradient(circle,var(--gold),transparent 70%);opacity:0;transition:var(--t)}
.card:hover{transform:translateY(-8px);border-color:rgba(233,184,114,.5);box-shadow:0 26px 50px rgba(0,0,0,.5)}
.card:hover::before{opacity:.18}
.card .ic{width:56px;height:56px;border-radius:15px;display:grid;place-items:center;font-size:1.5rem;margin-bottom:1.2rem;
  background:linear-gradient(135deg,rgba(233,184,114,.2),rgba(94,230,230,.15));border:1px solid var(--line)}
.card h3{font-size:1.25rem;margin-bottom:.6rem}
.card p{color:var(--txt-2);font-size:.95rem}

/* 游戏展示 */
.showcase{display:grid;grid-template-columns:1.05fr .95fr;gap:3rem;align-items:center}
.showcase:nth-child(even){grid-template-columns:.95fr 1.05fr}
.showcase:nth-child(even) .sc-text{grid-row:1;grid-column:2}
.showcase:nth-child(even) .sc-media{grid-row:1;grid-column:1}
.sc-media{position:relative;border-radius:22px;overflow:hidden;box-shadow:var(--shadow)}
.sc-media img{transition:transform .8s ease}
.sc-media:hover img{transform:scale(1.06)}
.sc-media::after{content:"";position:absolute;inset:0;background:linear-gradient(135deg,rgba(233,184,114,.18),transparent 60%)}
.sc-text h3{font-size:1.9rem;margin-bottom:1rem;font-weight:800}
.sc-text p{color:var(--txt-2);margin-bottom:1.4rem;font-size:1.02rem}
.tagrow{display:flex;gap:.6rem;flex-wrap:wrap;margin-bottom:1.6rem}
.tag{padding:.35rem 1rem;border-radius:999px;font-size:.8rem;color:var(--cyan);border:1px solid rgba(94,230,230,.35);background:rgba(94,230,230,.08)}
.link{display:inline-flex;align-items:center;gap:.5rem;color:var(--gold-2);font-weight:700;transition:var(--t)}
.link:hover{gap:.9rem}

/* 新闻 */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.6rem}
.news{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:var(--t)}
.news:hover{transform:translateY(-6px);border-color:rgba(94,230,230,.45)}
.news figure{aspect-ratio:16/10;overflow:hidden}
.news figure img{width:100%;height:100%;object-fit:cover;transition:transform .7s ease}
.news:hover figure img{transform:scale(1.08)}
.news-body{padding:1.4rem}
.news time{color:var(--gold);font-size:.82rem;letter-spacing:1px;font-weight:700}
.news h4{font-size:1.1rem;margin:.5rem 0 .8rem;line-height:1.5}
.news p{color:var(--txt-2);font-size:.92rem}

/* 时间线 */
.timeline{position:relative;max-width:860px;margin:0 auto;padding-left:2rem}
.timeline::before{content:"";position:absolute;left:7px;top:6px;bottom:6px;width:2px;background:linear-gradient(180deg,var(--gold),var(--cyan),transparent)}
.tl{position:relative;padding:0 0 2.2rem 2rem}
.tl::before{content:"";position:absolute;left:-2.35rem;top:6px;width:16px;height:16px;border-radius:50%;background:var(--gold);box-shadow:0 0 0 4px rgba(233,184,114,.2)}
.tl time{color:var(--gold-2);font-weight:800;letter-spacing:1px}
.tl h4{font-size:1.15rem;margin:.2rem 0 .4rem}
.tl p{color:var(--txt-2);font-size:.95rem}

/* 下载 */
.download{text-align:center;background:radial-gradient(ellipse at 50% 0%,rgba(61,123,255,.22),transparent 60%)}
.dl-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.4rem;max-width:820px;margin:2.6rem auto 0}
.dl{
  display:flex;flex-direction:column;align-items:center;gap:.8rem;
  padding:2rem 1.4rem;border-radius:var(--radius);
  background:var(--panel);border:1px solid var(--line);transition:var(--t);
}
.dl:hover{transform:translateY(-6px);border-color:var(--gold)}
.dl svg{width:42px;height:42px;fill:var(--gold-2)}
.dl b{font-size:1.1rem}
.dl span{color:var(--txt-2);font-size:.85rem}
.dl small{color:var(--cyan);font-weight:700;margin-top:.4rem}

/* 页脚 */
.footer{background:#050812;padding:64px 0 28px;border-top:1px solid var(--line)}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:2.4rem;margin-bottom:3rem}
.foot-brand p{color:var(--txt-2);font-size:.92rem;margin-top:1rem;max-width:320px}
.foot-col h5{font-size:1rem;margin-bottom:1rem;color:var(--gold-2)}
.foot-col a{display:block;color:var(--txt-2);font-size:.92rem;padding:.28rem 0;transition:var(--t)}
.foot-col a:hover{color:var(--cyan);transform:translateX(4px)}
.foot-bottom{display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap;padding-top:1.6rem;border-top:1px solid var(--line);color:var(--txt-2);font-size:.82rem}
.foot-bottom a{color:var(--txt-2)}
.foot-bottom a:hover{color:var(--gold-2)}

/* 动画 */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .7s ease,transform .7s cubic-bezier(.2,.7,.3,1)}
.reveal.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}}

/* ===== 响应式 ===== */
@media(max-width:960px){
  .features,.news-grid{grid-template-columns:repeat(2,1fr)}
  .stats{grid-template-columns:repeat(2,1fr)}
  .showcase,.showcase:nth-child(even){grid-template-columns:1fr;gap:1.8rem}
  .showcase:nth-child(even) .sc-text,.showcase:nth-child(even) .sc-media{grid-row:auto;grid-column:auto}
  .foot-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:680px){
  body{font-size:15px}
  section{padding:64px 0}
  .nav-links{position:fixed;inset:74px 0 0 100%;flex-direction:column;align-items:flex-start;gap:0;padding:1.6rem;background:rgba(7,11,26,.97);backdrop-filter:blur(14px);transition:.4s}
  .nav-links.open{inset:74px 0 0 0}
  .nav-links a{padding:1rem 0;width:100%;border-bottom:1px solid var(--line);font-size:1.05rem}
  .nav-links .nav-cta{margin-top:1rem;text-align:center;width:100%;justify-content:center}
  .menu-btn{display:flex}
  .features,.news-grid,.dl-grid{grid-template-columns:1fr}
  .stats{grid-template-columns:repeat(2,1fr);margin-top:-40px;gap:.8rem}
  .stat{padding:1.3rem .6rem}.stat b{font-size:1.7rem}
  .foot-grid{grid-template-columns:1fr}
  .hero-actions .btn{padding:.95rem 1.8rem;font-size:1rem;width:100%;justify-content:center}
  .hero-actions{flex-direction:column;align-items:stretch;gap:.8rem}
}