:root{
  --brand:#d45544;
  --brand-dark:#852215;
  --navy:#3c558b;
  --ink:#242424;
  --muted:#888;
  --line:rgba(204,204,204,.5);
}

*,*::before,*::after{box-sizing:border-box}

html{-webkit-text-size-adjust:100%}

body{
  margin:0;
  color:var(--ink);
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.7;
  background:#fff;
}

a{outline:none;color:var(--brand);text-decoration:none}
a:hover{text-decoration:none}

.container{width:100%;max-width:1100px;margin:0 auto;padding:0 20px}

/* ---------- Header ---------- */
.header{
  background:url(images/bg.png) no-repeat center center/cover;
  padding:40px 0 100px;
  position:relative;
}
.header::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(0,0,0,.45),rgba(0,0,0,.25));
  z-index:0;
}
.header .container{position:relative;z-index:1}

.topbar{
  display:flex;
  align-items:center;
  justify-content:space-between;
  flex-wrap:wrap;
  gap:16px;
}
.logo h1{
  margin:0;
  font-size:30px;
  letter-spacing:4px;
  color:#fff;
  font-weight:700;
}
.logo h1 a{color:#fff}
.logo h1 a:hover{color:#fff}
.social{display:flex;gap:12px}
.social a{
  display:flex;
  align-items:center;
  justify-content:center;
  width:40px;height:40px;
  border:1px solid #fff;
  border-radius:50%;
  color:#fff;
  transition:border-color .3s ease-in,color .3s ease-in;
}
.social a:hover{border-color:var(--brand);color:var(--brand)}

.main-title{text-align:center;padding:90px 0 40px;color:#fff}
.header-sm{padding:30px 0 50px}
.header-sm .main-title{padding:50px 0 0}
.header-sm .main-title h2{font-size:40px}
.eyebrow{
  margin:0 0 14px;
  font-size:14px;
  letter-spacing:6px;
  text-transform:uppercase;
  color:#ffd7d0;
  opacity:.95;
}
.main-title h2{
  margin:0;
  font-size:56px;
  line-height:1.25;
  color:var(--brand);
  text-shadow:0 2px 0 var(--brand-dark);
  font-weight:800;
}
.subtitle{
  max-width:760px;
  margin:20px auto 0;
  font-size:18px;
  color:#f2f2f2;
  font-weight:300;
}
.cta{
  display:flex;
  justify-content:center;
  gap:16px;
  flex-wrap:wrap;
  margin-top:34px;
}

.btn{
  display:inline-block;
  padding:15px 32px;
  font-size:16px;
  font-weight:600;
  letter-spacing:2px;
  border-radius:46px;
  transition:background .3s ease-in,color .3s ease-in,border-color .3s ease-in;
}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:#fff;color:var(--brand)}
.btn-ghost{
  background:transparent;
  color:#fff;
  border:1px solid #fff;
}
.btn-ghost:hover{background:#fff;color:var(--brand);border-color:#fff}
.btn-lg{padding:17px 44px;font-size:17px}

/* ---------- Sections ---------- */
.about{padding:80px 0 60px}
.logsec{padding:20px 0 70px}
.faq{padding:0 0 80px}

.section-title{
  margin:0 0 10px;
  text-align:center;
  font-size:36px;
  font-weight:800;
  color:var(--ink);
}
.section-title::after{
  content:"";
  display:block;
  width:56px;height:3px;
  margin:16px auto 0;
  background:var(--brand);
  border-radius:2px;
}
.section-desc{
  max-width:820px;
  margin:26px auto 0;
  text-align:center;
  color:#444;
  font-weight:300;
  font-size:17px;
}

.featurebox{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:26px 40px;
  margin-top:56px;
}
.feature h3{
  margin:0 0 8px;
  font-size:19px;
  color:var(--brand);
}
.feature p{margin:0;font-size:15px;color:var(--muted)}

.loglist{
  max-width:820px;
  margin:46px auto 0;
  padding:0;
  list-style:none;
}
.loglist li{
  display:flex;
  align-items:baseline;
  flex-wrap:wrap;
  gap:10px;
  padding:20px 0;
  border-bottom:1px solid var(--line);
}
.loglist .ver{
  font-weight:700;
  color:#fff;
  background:var(--brand);
  padding:2px 12px;
  border-radius:4px;
  font-size:14px;
}
.loglist .date{font-size:14px;color:var(--muted)}
.loglist p{
  flex:1 1 100%;
  margin:8px 0 0;
  color:#555;
  font-weight:300;
}
.more{margin:26px 0 0;text-align:center;font-size:16px}

.faq-list{max-width:820px;margin:46px auto 0}
.faq-list dt{
  font-weight:700;
  color:var(--ink);
  padding-top:22px;
  font-size:17px;
}
.faq-list dt::before{content:"Q  ";color:var(--brand)}
.faq-list dd{
  margin:8px 0 0;
  padding-bottom:20px;
  border-bottom:1px solid var(--line);
  color:#555;
  font-weight:300;
}

/* ---------- Footer ---------- */
.footer{
  position:relative;
  overflow:hidden;
  background:
    radial-gradient(900px 420px at 12% 0%,rgba(212,85,68,.28),transparent 60%),
    radial-gradient(700px 380px at 88% 100%,rgba(90,130,220,.30),transparent 62%),
    linear-gradient(160deg,#1d2740 0%,#2b3f6b 55%,#3c558b 100%);
  padding:78px 0 42px;
  color:#fff;
  isolation:isolate;
}
.footer::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:radial-gradient(rgba(255,255,255,.16) 1px,transparent 1.4px);
  background-size:26px 26px;
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.75),transparent 85%);
  mask-image:linear-gradient(180deg,rgba(0,0,0,.75),transparent 85%);
  z-index:-1;
  pointer-events:none;
}
.footer::after{
  content:"";
  position:absolute;
  left:0;right:0;top:0;
  height:3px;
  background:linear-gradient(90deg,transparent,var(--brand) 18%,#ffd7d0 50%,var(--brand) 82%,transparent);
  z-index:-1;
}
.footer .container{position:relative;z-index:1}

.footer-cols{
  display:grid;
  grid-template-columns:minmax(240px,1fr) minmax(0,1.5fr);
  gap:56px;
  align-items:center;
}
.footer-side{text-align:left}
.footer-title{text-align:left}

.footer-title .kicker{
  display:inline-block;
  margin:0 0 14px;
  padding:5px 13px;
  font-size:12px;
  letter-spacing:3px;
  text-transform:uppercase;
  color:#ffd7d0;
  border:1px solid rgba(255,215,208,.4);
  border-radius:999px;
}
.footer-title h2{
  margin:0;
  font-size:30px;
  line-height:1.3;
  font-weight:800;
  letter-spacing:.5px;
  background:linear-gradient(92deg,#fff 0%,#ffd7d0 45%,#ff9f8f 100%);
  -webkit-background-clip:text;
  background-clip:text;
  -webkit-text-fill-color:transparent;
  color:#fff;
}
.footer-title p{
  margin:14px 0 28px;
  max-width:520px;
  font-size:16px;
  font-weight:300;
  color:#dbe2f2;
}
.footer-title .btn-lg{
  box-shadow:0 12px 30px -10px rgba(212,85,68,.9);
}
.footer-title .btn-primary:hover{box-shadow:0 12px 30px -10px rgba(255,255,255,.7)}

/* QQ 群 —— 节点徽标样式 */
.contact{
  position:relative;
  margin:0 0 26px;
  padding-left:52px;
  min-height:40px;
  display:flex;
  flex-direction:column;
  justify-content:center;
  font-size:13px;
  letter-spacing:1px;
  color:#aebbd8;
}
.contact::before{
  content:"";
  position:absolute;
  left:0;top:50%;
  transform:translateY(-50%);
  width:40px;height:40px;
  border-radius:12px;
  background:
    radial-gradient(circle at 30% 30%,rgba(212,85,68,.9),rgba(212,85,68,.35) 70%),
    linear-gradient(150deg,#e97a67,#b9432f);
  box-shadow:0 8px 20px -8px rgba(212,85,68,.95),inset 0 0 0 1px rgba(255,255,255,.25);
}
.contact::after{
  content:"";
  position:absolute;
  left:13px;top:50%;
  width:14px;height:14px;
  transform:translateY(-50%);
  background:#fff;
  -webkit-mask:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'><path d='M8 0C4.7 0 2.8 2.5 2.8 5.6c0 .6-.4 1.4-.9 2.4-.6 1.2-1.3 2.6-1.3 4 0 .8.5 1.3 1.1 1.3.5 0 .9-.3 1.2-.7.3.8.8 1.5 1.4 2-.5.3-.9.6-.9 1 0 .6 1 1 2.1 1 .9 0 1.6-.2 2.5-.2s1.6.2 2.5.2c1.1 0 2.1-.4 2.1-1 0-.4-.4-.7-.9-1 .6-.5 1.1-1.2 1.4-2 .3.4.7.7 1.2.7.6 0 1.1-.5 1.1-1.3 0-1.4-.7-2.8-1.3-4-.5-1-.9-1.8-.9-2.4C13.2 2.5 11.3 0 8 0Z'/></svg>") center/contain no-repeat;
  mask:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'><path d='M8 0C4.7 0 2.8 2.5 2.8 5.6c0 .6-.4 1.4-.9 2.4-.6 1.2-1.3 2.6-1.3 4 0 .8.5 1.3 1.1 1.3.5 0 .9-.3 1.2-.7.3.8.8 1.5 1.4 2-.5.3-.9.6-.9 1 0 .6 1 1 2.1 1 .9 0 1.6-.2 2.5-.2s1.6.2 2.5.2c1.1 0 2.1-.4 2.1-1 0-.4-.4-.7-.9-1 .6-.5 1.1-1.2 1.4-2 .3.4.7.7 1.2.7.6 0 1.1-.5 1.1-1.3 0-1.4-.7-2.8-1.3-4-.5-1-.9-1.8-.9-2.4C13.2 2.5 11.3 0 8 0Z'/></svg>") center/contain no-repeat;
}
.contact strong{
  display:block;
  margin-top:3px;
  font-size:16px;
  letter-spacing:.5px;
  color:#fff;
}

/* 徽章 —— 节点连线风格 */
.badges{
  display:flex;
  flex-direction:column;
  align-items:flex-start;
  gap:12px;
  margin:0;
  padding:0;
  list-style:none;
}
.badges li{
  position:relative;
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:9px 18px 9px 15px;
  font-size:13px;
  letter-spacing:.6px;
  color:#eaf0ff;
  border:1px solid rgba(143,208,255,.28);
  border-radius:999px;
  background:linear-gradient(120deg,rgba(255,255,255,.09),rgba(255,255,255,.03));
  backdrop-filter:blur(4px);
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.badges li::before{
  content:"";
  position:absolute;
  left:-24px;top:50%;
  width:24px;height:1px;
  background:linear-gradient(90deg,transparent,rgba(143,208,255,.5));
}
.badges li:hover{
  transform:translateX(4px);
  border-color:rgba(143,208,255,.7);
  box-shadow:0 10px 26px -12px rgba(143,208,255,.85);
}
.badges svg{color:#8fd0ff;flex:none}

.footer-line{
  margin:42px 0 0;
  padding-top:26px;
  border-top:1px solid rgba(255,255,255,.14);
  font-size:14px;
  letter-spacing:1px;
  color:#c3cde4;
  text-align:center;
}
.footer-line strong,.footer-line span{color:#fff}

.footer-plain{text-align:center}
.footer-plain .badges{
  flex-direction:row;
  flex-wrap:wrap;
  justify-content:center;
  margin-top:6px;
}
.footer-plain .badges li::before{display:none}

/* ---------- Responsive ---------- */
@media (max-width:767px){
  .header{padding:30px 0 70px}
  .topbar{justify-content:center;text-align:center}
  .logo h1{font-size:24px}
  .main-title{padding:44px 0 0}
  .main-title h2{font-size:34px}
  .subtitle{font-size:16px}
  .eyebrow{letter-spacing:4px}
  .cta .btn{padding:13px 24px;font-size:14px}
  .section-title{font-size:26px}
  .featurebox{grid-template-columns:1fr;gap:20px}
  .footer{padding:60px 0 36px}
  .footer-cols{grid-template-columns:1fr;gap:40px;text-align:center}
  .footer-side,.footer-title{text-align:center}
  .footer-title h2{font-size:22px}
  .footer-title p{margin-left:auto;margin-right:auto}
  .contact{padding-left:0;padding-top:54px;align-items:center;min-height:0}
  .contact::before{top:0;transform:none}
  .contact::after{top:13px;transform:none}
  .badges{align-items:center}
  .badges li::before{display:none}
}