/* ============================================
   腾龙公司游戏官方网站 - 样式表
   单页面 · 响应式 · SEO 友好
   ============================================ */

/* --- 基础与重置 --- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
:root{
  --bg:#0a0e1a; --bg2:#0f1424; --card:#141a2e; --line:rgba(255,255,255,.08);
  --txt:#e8ecf5; --txt-dim:#9aa4bd; --primary:#ff7a3d; --primary2:#ff9d5c;
  --accent:#4fd1c5; --gold:#f6c445;
  --max:1180px; --side:24px;
  --shadow:0 20px 50px rgba(0,0,0,.35);
  --radius:16px;
}
html{ scroll-behavior:smooth; -webkit-text-size-adjust:100%; }
body{
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","WenQuanYi Micro Hei",sans-serif;
  background:var(--bg); color:var(--txt); line-height:1.75;
  overflow-x:hidden; font-size:15px;
}
a{ color:inherit; text-decoration:none; transition:.25s; }
ul{ list-style:none; }
img{ max-width:100%; display:block; }
button{ font-family:inherit; cursor:pointer; border:none; background:none; color:inherit; }
input, textarea{ font-family:inherit; outline:none; }

/* 两侧留白：内容居中 */
.container{ max-width:var(--max); margin:0 auto; padding:0 var(--side); width:100%; }

/* --- 按钮 --- */
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  padding:15px 44px; font-size:18px; font-weight:700; letter-spacing:2px;
  border-radius:50px; position:relative; overflow:hidden;
  transition:transform .25s, box-shadow .25s;
  will-change:transform;
}
.btn-primary{
  color:#fff;
  background:linear-gradient(135deg,var(--primary),var(--primary2));
  box-shadow:0 12px 30px rgba(255,122,61,.45);
}
.btn-primary::after{
  content:""; position:absolute; inset:0;
  background:linear-gradient(135deg,rgba(255,255,255,.28),transparent 60%);
  opacity:0; transition:.3s;
}
.btn-primary:hover{ transform:translateY(-4px); box-shadow:0 18px 40px rgba(255,122,61,.6); }
.btn-primary:hover::after{ opacity:1; }
.btn-ghost{
  color:#fff; border:2px solid rgba(255,255,255,.75);
  backdrop-filter:blur(6px);
}
.btn-ghost:hover{ background:rgba(255,255,255,.14); transform:translateY(-4px); }
.btn-block{ width:100%; }

/* --- 导航 --- */
.site-header{
  position:fixed; top:0; left:0; right:0; z-index:100;
  background:rgba(10,14,26,.72); backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line); transition:padding .3s, background .3s;
}
.site-header.scrolled{ background:rgba(8,11,20,.92); box-shadow:0 6px 24px rgba(0,0,0,.4); }
.nav-wrap{ display:flex; align-items:center; justify-content:space-between; height:72px; }
.logo{ display:flex; align-items:center; gap:10px; font-size:24px; font-weight:800; color:#fff; }
.logo-dragon{
  width:38px; height:38px; border-radius:10px;
  background:radial-gradient(circle at 35% 30%,#ffb27a,#ff7a3d 55%,#c6501f);
  position:relative; box-shadow:0 6px 16px rgba(255,122,61,.4);
}
.logo-dragon::before, .logo-dragon::after{ content:""; position:absolute; background:#7a2e0c; border-radius:50%; }
.logo-dragon::before{ width:10px; height:10px; top:11px; left:11px; box-shadow:14px 0 0 #7a2e0c; }
.logo-dragon::after{ width:16px; height:9px; bottom:7px; left:9px; border-radius:0 0 16px 16px; background:#3d1a08; }
.logo-sub{ color:var(--primary); }
.logo-light .logo-sub{ color:var(--gold); }
.main-nav{ display:flex; align-items:center; gap:6px; }
.nav-link{ padding:10px 18px; font-size:15px; font-weight:600; color:var(--txt-dim); border-radius:30px; position:relative; }
.nav-link:hover{ color:#fff; background:rgba(255,255,255,.06); }
.nav-link.active{ color:#fff; background:linear-gradient(135deg,var(--primary),var(--primary2)); box-shadow:0 6px 18px rgba(255,122,61,.35); }

/* 「登录游戏」导航按钮 —— 图标 + 边框强化，符合龙主题 */
.nav-login{
  margin-left:8px;
  display:inline-flex; align-items:center; gap:9px;
  padding:9px 20px;
  color:#fff;
  background:rgba(255,122,61,.14);
  border:2px solid rgba(255,154,92,.55);
  box-shadow:inset 0 0 16px rgba(255,122,61,.12);
  position:relative; overflow:hidden;
}
.nav-login::before{
  content:""; position:absolute; left:0; top:0; bottom:0; width:4px;
  background:linear-gradient(180deg,var(--primary),var(--gold));
  border-radius:0 4px 4px 0;
}
.nav-login:hover{
  color:#fff; background:rgba(255,122,61,.26);
  border-color:rgba(255,154,92,.95);
  box-shadow:0 8px 22px rgba(255,122,61,.32), inset 0 0 20px rgba(255,122,61,.18);
  transform:translateY(-2px);
}
.nav-login .nav-login-ico{ display:inline-flex; transition:transform .3s; }
.nav-login:hover .nav-login-ico{ transform:translateX(4px); }

.nav-toggle{ display:none; flex-direction:column; gap:5px; padding:6px; }
.nav-toggle span{ width:24px; height:2px; background:#fff; border-radius:2px; transition:.3s; }

/* --- 横幅 Banner --- */
.banner{ position:relative; min-height:100vh; display:flex; align-items:center; justify-content:center; overflow:hidden; padding-top:72px; }
.banner-bg{
  position:absolute; inset:0; z-index:0;
  background:
    radial-gradient(1200px 600px at 50% -10%, rgba(255,122,61,.35), transparent 60%),
    radial-gradient(900px 500px at 80% 30%, rgba(79,209,197,.18), transparent 55%),
    radial-gradient(800px 500px at 15% 60%, rgba(166,108,255,.18), transparent 55%),
    linear-gradient(180deg,#070a14 0%,#0a0e1a 50%,#0c1120 100%);
}
.banner-bg::before{
  content:""; position:absolute; inset:0;
  background-image:
    linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(circle at 50% 45%, #000 0%, transparent 70%);
  -webkit-mask-image:radial-gradient(circle at 50% 45%, #000 0%, transparent 70%);
}
.banner-particles{ position:absolute; inset:0; z-index:1; pointer-events:none; }
.banner-particles i{
  position:absolute; width:var(--s); height:var(--s); border-radius:50%;
  background:radial-gradient(circle, var(--c), transparent 60%);
  left:var(--x); top:var(--y); opacity:var(--o);
  animation:floatUp var(--d) linear infinite;
}
@keyframes floatUp{ 0%{ transform:translateY(20px); opacity:0; } 20%{ opacity:var(--o); } 100%{ transform:translateY(-110vh); opacity:0; } }
.banner-inner{ position:relative; z-index:2; text-align:center; }
.banner-buttons{ display:flex; gap:24px; justify-content:center; flex-wrap:wrap; animation:popIn .9s cubic-bezier(.2,.8,.2,1) both; }
@keyframes popIn{ from{ opacity:0; transform:translateY(30px) scale(.96); } to{ opacity:1; transform:none; } }
.banner-scroll{
  position:absolute; bottom:26px; left:50%; transform:translateX(-50%); z-index:2;
  width:26px; height:42px; border:2px solid rgba(255,255,255,.4); border-radius:20px;
}
.banner-scroll span{ position:absolute; left:50%; top:8px; width:4px; height:8px; border-radius:4px; background:#fff; transform:translateX(-50%); animation:scroll 1.6s ease-in-out infinite; }
@keyframes scroll{ 0%,100%{ opacity:0; transform:translate(-50%,0); } 50%{ opacity:1; transform:translate(-50%,12px); } }

/* --- 通用区块 --- */
.section{ padding:96px 0; position:relative; }
.section-dark{ background:linear-gradient(180deg,#0c1120,#0a0e1a); }
.sec-head{ text-align:center; margin-bottom:56px; }
.sec-tag{ display:inline-block; font-size:13px; letter-spacing:5px; color:var(--primary); font-weight:700; margin-bottom:12px; }
.sec-title{ font-size:38px; font-weight:800; letter-spacing:2px; }
.sec-line{ margin-top:16px; }
.sec-line i{ display:inline-block; width:64px; height:3px; border-radius:3px; background:linear-gradient(90deg,var(--primary),var(--accent)); }

/* --- 公司简介 --- */
.about-grid{ display:grid; grid-template-columns:1.15fr .85fr; gap:56px; align-items:center; }
.about-text h3{ font-size:26px; margin-bottom:18px; color:#fff; }
.about-text p{ color:var(--txt-dim); margin-bottom:14px; }
.about-text strong{ color:var(--primary); }
.about-stats{ display:grid; grid-template-columns:repeat(4,1fr); gap:16px; margin-top:28px; }
.about-stats li{ text-align:center; padding:16px 6px; border:1px solid var(--line); border-radius:12px; background:rgba(255,255,255,.02); }
.about-stats b{ display:block; font-size:30px; font-weight:800; color:var(--gold); line-height:1.2; }
.about-stats span{ font-size:13px; color:var(--txt-dim); }
.about-cards{ display:grid; gap:18px; }
.val-card{ padding:22px 24px; border:1px solid var(--line); border-radius:var(--radius); background:linear-gradient(135deg,rgba(255,255,255,.05),rgba(255,255,255,.01)); display:flex; gap:18px; align-items:flex-start; transition:.3s; }
.val-card:hover{ transform:translateX(8px); border-color:var(--c); }
.val-ico{
  flex:none; width:54px; height:54px; border-radius:14px; display:grid; place-items:center;
  font-size:26px; font-weight:800; color:#fff;
  background:radial-gradient(circle at 30% 25%, color-mix(in srgb, var(--c) 70%, #fff), var(--c));
  box-shadow:0 10px 24px color-mix(in srgb, var(--c) 40%, transparent);
}
.val-card h4{ font-size:18px; margin-bottom:6px; }
.val-card p{ font-size:14px; color:var(--txt-dim); }

/* --- 公司历程 --- */
.timeline{ position:relative; max-width:860px; margin:0 auto; padding:20px 0; }
.timeline::before{ content:""; position:absolute; left:50%; top:0; bottom:0; width:3px; background:linear-gradient(180deg,var(--primary),var(--accent)); transform:translateX(-50%); }
.tl-item{ position:relative; width:50%; padding:0 44px 44px; }
.tl-item:nth-child(odd){ left:0; text-align:right; }
.tl-item:nth-child(even){ left:50%; }
.tl-dot{ position:absolute; top:8px; width:20px; height:20px; border-radius:50%; background:var(--primary); box-shadow:0 0 0 6px rgba(255,122,61,.18); z-index:2; }
.tl-item:nth-child(odd) .tl-dot{ right:-10px; }
.tl-item:nth-child(even) .tl-dot{ left:-10px; }
.tl-year{ display:inline-block; font-size:15px; font-weight:800; color:var(--primary); letter-spacing:1px; margin-bottom:8px; }
.tl-content{ padding:18px 22px; border:1px solid var(--line); border-radius:var(--radius); background:rgba(255,255,255,.03); transition:.3s; }
.tl-content:hover{ border-color:var(--primary); transform:translateY(-4px); }
.tl-content h4{ font-size:18px; margin-bottom:6px; }
.tl-content p{ font-size:14px; color:var(--txt-dim); }

/* --- 游戏种类 --- */
.game-filter{ display:flex; justify-content:center; gap:12px; flex-wrap:wrap; margin-bottom:40px; }
.filter-btn{ padding:10px 26px; border-radius:30px; font-size:15px; font-weight:600; color:var(--txt-dim); border:1px solid var(--line); transition:.25s; }
.filter-btn:hover{ color:#fff; border-color:var(--primary); }
.filter-btn.active{ color:#fff; background:linear-gradient(135deg,var(--primary),var(--primary2)); border-color:transparent; box-shadow:0 8px 20px rgba(255,122,61,.35); }
.game-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:28px; }
.game-card{ border:1px solid var(--line); border-radius:var(--radius); overflow:hidden; background:var(--card); transition:transform .35s, box-shadow .35s, opacity .35s; }
.game-card:hover{ transform:translateY(-10px); box-shadow:var(--shadow); border-color:rgba(255,122,61,.5); }
.game-cover{ height:180px; display:grid; place-items:center; position:relative; overflow:hidden; background:linear-gradient(135deg, color-mix(in srgb, var(--g) 80%, #000), var(--g)); }
.game-ico{ font-size:64px; filter:drop-shadow(0 8px 16px rgba(0,0,0,.35)); transition:.4s; }
.game-card:hover .game-ico{ transform:scale(1.18) rotate(-6deg); }
.game-badge{ position:absolute; top:14px; right:14px; background:var(--gold); color:#3a2a00; font-size:12px; font-weight:800; padding:4px 12px; border-radius:20px; z-index:3; }
.game-info{ padding:20px; }
.game-info h4{ font-size:19px; margin-bottom:8px; }
.game-info p{ font-size:14px; color:var(--txt-dim); min-height:44px; }
.game-meta{ display:flex; justify-content:space-between; align-items:center; margin-top:14px; padding-top:12px; border-top:1px solid var(--line); font-size:13px; }
.game-meta span:first-child{ color:var(--primary); font-weight:600; }
.game-meta span:last-child{ color:var(--gold); letter-spacing:1px; }
.game-card.hide{ display:none; }

/* --- 登录 --- */
.section-login{ background:radial-gradient(900px 500px at 50% 0%, rgba(255,122,61,.12), transparent 60%), var(--bg); }
.login-wrap{ display:grid; grid-template-columns:1fr 1fr; gap:48px; max-width:900px; margin:0 auto; align-items:stretch; }
.login-form, .contact-form{ padding:36px; border:1px solid var(--line); border-radius:20px; background:linear-gradient(160deg,rgba(255,255,255,.06),rgba(255,255,255,.01)); backdrop-filter:blur(10px); }
.login-form h3{ font-size:24px; margin-bottom:24px; text-align:center; }
.form-row{ margin-bottom:18px; display:flex; flex-direction:column; gap:8px; }
.form-row label{ font-size:14px; font-weight:600; color:var(--txt-dim); }
.form-row input, .form-row textarea{ padding:14px 16px; border-radius:12px; border:1px solid var(--line); background:rgba(0,0,0,.25); color:var(--txt); font-size:15px; transition:.25s; }
.form-row input:focus, .form-row textarea:focus{ border-color:var(--primary); box-shadow:0 0 0 4px rgba(255,122,61,.15); }
.form-extra{ flex-direction:row; align-items:center; justify-content:space-between; }
.check{ display:flex; align-items:center; gap:8px; color:var(--txt-dim); font-size:14px; cursor:pointer; }
.forget{ font-size:14px; color:var(--primary); }
.form-tip{ text-align:center; font-size:13px; color:var(--txt-dim); margin-top:16px; }
.form-tip a{ color:var(--accent); }
.login-side{ padding:36px; border:1px dashed var(--primary); border-radius:20px; background:rgba(255,122,61,.06); }
.login-side h4{ font-size:20px; margin-bottom:20px; color:var(--gold); }
.login-side ul{ display:grid; gap:14px; margin-bottom:26px; }
.login-side li{ display:flex; align-items:center; gap:14px; font-size:15px; }
.login-side li i{ font-style:normal; font-size:22px; }
.login-side li b{ color:var(--gold); }
.qr-box{ text-align:center; padding-top:20px; border-top:1px solid var(--line); }
.qr{ width:120px; height:120px; margin:0 auto 12px; border-radius:14px; background:repeating-linear-gradient(45deg,#fff 0 6px,#222 6px 12px); position:relative; }
.qr::after{ content:"腾龙"; position:absolute; inset:0; display:grid; place-items:center; font-weight:800; color:#ff7a3d; font-size:18px; mix-blend-mode:difference; }
.qr-box p{ font-size:13px; color:var(--txt-dim); }

/* --- 联系我们 --- */
.contact-grid{ display:grid; grid-template-columns:1fr 1.1fr; gap:48px; }
.contact-info{ display:grid; gap:20px; }
.ci-item{ display:flex; gap:18px; align-items:flex-start; padding:20px; border:1px solid var(--line); border-radius:var(--radius); background:rgba(255,255,255,.02); transition:.3s; }
.ci-item:hover{ border-color:var(--accent); transform:translateX(6px); }
.ci-ico{ font-size:26px; line-height:1; }
.ci-item b{ display:block; font-size:16px; margin-bottom:4px; }
.ci-item p{ font-size:14px; color:var(--txt-dim); }

/* --- 页脚 --- */
.site-footer{ border-top:1px solid var(--line); background:#070a14; padding:56px 0 24px; }
.foot-top{ display:grid; grid-template-columns:2fr 1fr 1fr 1fr; gap:40px; margin-bottom:36px; }
.foot-brand p{ color:var(--txt-dim); font-size:14px; margin-top:14px; }
.foot-links h5{ font-size:16px; margin-bottom:16px; color:var(--gold); }
.foot-links a{ display:block; color:var(--txt-dim); font-size:14px; padding:5px 0; }
.foot-links a:hover{ color:var(--primary); transform:translateX(4px); }
.foot-qr{ text-align:center; }
.foot-qr .qr{ width:96px; height:96px; margin:0 auto 10px; border-radius:12px; background:repeating-linear-gradient(45deg,#fff 0 5px,#222 5px 10px); }
.foot-qr p{ font-size:13px; color:var(--txt-dim); }
.foot-bottom{ border-top:1px solid var(--line); padding-top:20px; text-align:center; font-size:13px; color:var(--txt-dim); }
.foot-warn{ margin-top:10px; color:#6f7a93; }

/* --- 动画 --- */
.reveal{ opacity:0; transform:translateY(30px); transition:.7s cubic-bezier(.2,.8,.2,1); }
.reveal.in{ opacity:1; transform:none; }

/* --- 响应式 --- */
@media (max-width:960px){
  .about-grid, .login-wrap, .contact-grid{ grid-template-columns:1fr; gap:36px; }
  .game-grid{ grid-template-columns:repeat(2,1fr); }
  .foot-top{ grid-template-columns:1fr 1fr; }
  .sec-title{ font-size:30px; }
}
@media (max-width:720px){
  .site-header.scrolled .nav-wrap{ height:64px; }
  .nav-toggle{ display:flex; z-index:11; }
  .main-nav{ position:fixed; inset:0; top:0; background:rgba(7,10,20,.98); backdrop-filter:blur(16px); flex-direction:column; justify-content:center; gap:8px; transform:translateX(100%); transition:.4s; z-index:10; }
  .main-nav.open{ transform:none; }
  .nav-link{ font-size:20px; padding:16px 32px; }
  .banner{ min-height:88vh; }
  .btn{ padding:14px 34px; font-size:17px; }
  .banner-buttons{ gap:16px; }
  .section{ padding:68px 0; }
  .game-grid{ grid-template-columns:1fr; }
  .about-stats{ grid-template-columns:repeat(2,1fr); }
  .timeline::before{ left:16px; }
  .tl-item{ width:100%; left:0 !important; text-align:left; padding:0 0 36px 40px; }
  .tl-dot{ left:6px !important; right:auto !important; }
  .foot-top{ grid-template-columns:1fr; }
  .sec-title{ font-size:26px; }
}