@charset "UTF-8";
/* ===================================================================
   烈焰传奇3 - 烈焰风暴风样式表
   主背景：#0d0604 -> #1a0a05 深黑渐变 + 火焰光晕
   主色调：烈焰红 #ff4500 / 橙色 #ff8c00 / 火星金 #ffd700
   设计理念：深黑底 + 烈焰发光边缘 + 火星粒子上升
   =================================================================== */

/* ---------- 全局变量 ---------- */
:root {
  /* 深色背景 */
  --bg-dark: #0d0604;
  --bg-dark-2: #1a0a05;
  --bg-card: rgba(26, 10, 5, 0.75);
  --bg-card-hover: rgba(45, 18, 8, 0.9);

  /* 烈焰配色 */
  --flame-red: #ff4500;
  --flame-red-dark: #cc3700;
  --flame-orange: #ff8c00;
  --flame-orange-dark: #cc7000;
  --spark-gold: #ffd700;
  --ember: #ff6a00;

  /* 文字颜色 */
  --text: #f5e6d3;
  --text-dim: #b89878;
  --text-bright: #ffd700;
  --text-glow: #ffaa55;

  /* 边框 */
  --border-flame: rgba(255, 69, 0, 0.35);
  --border-flame-hover: rgba(255, 140, 0, 0.65);
  --border-gold: rgba(255, 215, 0, 0.3);

  /* 阴影 */
  --shadow-soft: 0 4px 20px rgba(255, 69, 0, 0.12);
  --shadow-hover: 0 10px 36px rgba(255, 69, 0, 0.28);
  --shadow-glow: 0 0 20px rgba(255, 69, 0, 0.25);
  --shadow-glow-strong: 0 0 28px rgba(255, 140, 0, 0.4), 0 0 12px rgba(255, 69, 0, 0.3);

  /* 其他 */
  --radius: 8px;
  --maxw: 1200px;
  --nav-h: 64px;
}

/* ---------- 基础重置 ---------- */
* { margin: 0; padding: 0; box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: "Microsoft YaHei", "微软雅黑", "PingFang SC", "Helvetica Neue", sans-serif;
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
  /* 深色径向渐变 + 火焰光晕 */
  background:
    radial-gradient(ellipse at 50% 100%, rgba(255, 69, 0, 0.18) 0%, transparent 55%),
    radial-gradient(ellipse at 30% 10%, rgba(255, 140, 0, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse at 70% 60%, rgba(204, 55, 0, 0.06) 0%, transparent 45%),
    linear-gradient(180deg, var(--bg-dark) 0%, var(--bg-dark-2) 50%, var(--bg-dark) 100%);
  background-attachment: fixed;
  min-height: 100vh;
}

/* 火星点状纹理叠加 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image: radial-gradient(circle, rgba(255, 140, 0, 0.12) 1px, transparent 1.5px);
  background-size: 32px 32px;
  opacity: 0.3;
}

a {
  color: var(--flame-orange);
  text-decoration: none;
  transition: color .25s, text-shadow .25s;
}
a:hover {
  color: var(--spark-gold);
  text-shadow: 0 0 8px rgba(255, 215, 0, 0.4);
}
ul { list-style: none; }
img { max-width: 100%; display: block; }

.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 20px;
}

/* ---------- 火焰粒子背景 ---------- */
.firefield {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}
.firefield .ember {
  position: absolute;
  bottom: -12px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--spark-gold) 0%, var(--flame-orange) 45%, var(--flame-red) 100%);
  box-shadow:
    0 0 4px var(--flame-orange),
    0 0 8px var(--flame-red),
    0 0 12px rgba(255, 69, 0, 0.4);
  animation: emberRise linear infinite;
  opacity: 0;
}
@keyframes emberRise {
  0% {
    transform: translateY(0) translateX(0) scale(1);
    opacity: 0;
  }
  8% { opacity: 0.9; }
  30% {
    transform: translateY(-30vh) translateX(8px) scale(0.85);
    opacity: 0.8;
  }
  60% {
    transform: translateY(-60vh) translateX(-6px) scale(0.6);
    opacity: 0.5;
  }
  90% { opacity: 0.2; }
  100% {
    transform: translateY(-108vh) translateX(10px) scale(0.2);
    opacity: 0;
  }
}

/* 内容层在粒子之上 */
.navbar, .hero, section, .footer, .service-fab, .back-top {
  position: relative;
  z-index: 2;
}

/* ===================================================================
   1. 固定导航栏
   =================================================================== */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(13, 6, 4, 0.72);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-flame);
  transition: background .3s, box-shadow .3s, border-color .3s;
}
.navbar.scrolled {
  background: rgba(13, 6, 4, 0.94);
  box-shadow: 0 2px 24px rgba(255, 69, 0, 0.18);
  border-bottom-color: rgba(255, 69, 0, 0.55);
}
.nav-container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 20px;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  font-size: 24px;
  font-weight: 900;
  letter-spacing: 2px;
  color: var(--spark-gold);
  text-shadow:
    0 0 10px rgba(255, 69, 0, 0.5),
    0 0 20px rgba(255, 140, 0, 0.3);
  transition: text-shadow .3s;
}
.logo:hover {
  color: var(--spark-gold);
  text-shadow:
    0 0 14px rgba(255, 69, 0, 0.7),
    0 0 28px rgba(255, 140, 0, 0.5);
}
.nav-menu {
  display: flex;
  gap: 6px;
}
.nav-link {
  display: block;
  padding: 8px 18px;
  color: var(--text);
  font-size: 15px;
  position: relative;
  border-radius: 4px;
  transition: color .25s, background .25s;
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 50%; bottom: 2px;
  width: 0; height: 2px;
  background: linear-gradient(90deg, var(--flame-red), var(--flame-orange), var(--spark-gold));
  border-radius: 2px;
  box-shadow: 0 0 6px var(--flame-orange);
  transition: width .3s, left .3s;
}
.nav-link:hover {
  color: var(--spark-gold);
  background: rgba(255, 69, 0, 0.08);
}
.nav-link:hover::after { width: 70%; left: 15%; }

/* 汉堡按钮 */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px; height: 40px;
  background: none; border: none;
  cursor: pointer;
}
.nav-toggle span {
  display: block;
  width: 26px; height: 2px;
  background: var(--spark-gold);
  border-radius: 2px;
  box-shadow: 0 0 4px var(--flame-orange);
  transition: transform .3s, opacity .3s, background .3s;
}
.nav-toggle.active span { background: var(--flame-orange); }
.nav-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ===================================================================
   2. 全屏 Hero
   =================================================================== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 100px 20px 60px;
  overflow: hidden;
}
.hero-glow {
  position: absolute;
  inset: 0;
  z-index: -1;
  /* 火焰光晕 */
  background:
    radial-gradient(circle at 50% 65%, rgba(255, 69, 0, 0.22) 0%, transparent 45%),
    radial-gradient(circle at 50% 75%, rgba(255, 140, 0, 0.12) 0%, transparent 40%),
    radial-gradient(circle at 50% 50%, rgba(204, 55, 0, 0.05) 0%, transparent 60%);
  animation: glowPulse 4s ease-in-out infinite;
}
.hero-glow::before {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    0deg, transparent 0, transparent 38px,
    rgba(255, 69, 0, 0.03) 38px, rgba(255, 69, 0, 0.03) 39px
  );
}
@keyframes glowPulse {
  0%, 100% { opacity: 0.7; }
  50% { opacity: 1; }
}
.hero-inner { max-width: 820px; }
.hero-version {
  display: inline-block;
  padding: 5px 20px;
  margin-bottom: 22px;
  font-size: 14px;
  letter-spacing: 1px;
  color: var(--spark-gold);
  border: 1px solid var(--border-flame);
  border-radius: 20px;
  background: rgba(13, 6, 4, 0.6);
  box-shadow:
    var(--shadow-soft),
    inset 0 0 8px rgba(255, 69, 0, 0.08);
}
.hero-title {
  font-size: clamp(42px, 8vw, 88px);
  font-weight: 900;
  letter-spacing: 6px;
  line-height: 1.1;
  margin-bottom: 18px;
  color: var(--spark-gold);
  /* 标题发光文字阴影 */
  text-shadow:
    0 0 12px rgba(255, 69, 0, 0.6),
    0 0 28px rgba(255, 69, 0, 0.4),
    0 0 48px rgba(255, 140, 0, 0.25),
    0 2px 6px rgba(0, 0, 0, 0.5);
  animation: titleGlow 4s ease-in-out infinite;
}
@keyframes titleGlow {
  0%, 100% {
    text-shadow:
      0 0 12px rgba(255, 69, 0, 0.6),
      0 0 28px rgba(255, 69, 0, 0.4),
      0 0 48px rgba(255, 140, 0, 0.25),
      0 2px 6px rgba(0, 0, 0, 0.5);
  }
  50% {
    text-shadow:
      0 0 18px rgba(255, 69, 0, 0.8),
      0 0 40px rgba(255, 69, 0, 0.55),
      0 0 64px rgba(255, 140, 0, 0.35),
      0 2px 6px rgba(0, 0, 0, 0.5);
  }
}
.hero-slogan {
  font-size: clamp(16px, 2.5vw, 22px);
  color: var(--text-glow);
  letter-spacing: 3px;
  margin-bottom: 30px;
  text-shadow: 0 0 8px rgba(255, 140, 0, 0.2);
}
.hero-opentime {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 12px 28px;
  margin-bottom: 28px;
  /* 火焰边缘效果 */
  border: 1px solid var(--border-flame);
  border-radius: var(--radius);
  background: rgba(13, 6, 4, 0.7);
  box-shadow:
    0 0 18px rgba(255, 69, 0, 0.15),
    inset 0 0 10px rgba(255, 69, 0, 0.05);
}
.opentime-label {
  font-size: 14px;
  color: var(--flame-orange);
  letter-spacing: 1px;
}
.opentime-value {
  font-size: 22px;
  font-weight: 700;
  color: var(--spark-gold);
  text-shadow: 0 0 8px rgba(255, 215, 0, 0.3);
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-block;
  padding: 14px 44px;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 2px;
  border-radius: var(--radius);
  cursor: pointer;
  transition: transform .25s, box-shadow .25s, background .25s;
  border: none;
  text-align: center;
}
.btn-primary {
  color: #ffffff;
  /* 红橙渐变 + 发光阴影 */
  background: linear-gradient(135deg, var(--flame-red), var(--flame-orange), var(--ember));
  box-shadow:
    0 4px 16px rgba(255, 69, 0, 0.4),
    0 0 20px rgba(255, 140, 0, 0.25),
    inset 0 1px 0 rgba(255, 255, 255, 0.2);
  border: 1px solid rgba(255, 200, 100, 0.3);
}
.btn-primary:hover {
  color: #ffffff;
  transform: translateY(-3px);
  box-shadow:
    0 8px 28px rgba(255, 69, 0, 0.55),
    0 0 32px rgba(255, 140, 0, 0.4),
    inset 0 1px 0 rgba(255, 255, 255, 0.3);
}
.btn-dl {
  display: block;
  width: 100%;
  margin-top: 16px;
  padding: 11px;
  font-size: 15px;
  color: var(--flame-orange);
  background: rgba(255, 69, 0, 0.08);
  border: 1px solid var(--border-flame);
}
.btn-dl:hover {
  color: #ffffff;
  background: linear-gradient(135deg, var(--flame-red), var(--flame-orange));
  box-shadow: 0 4px 16px rgba(255, 69, 0, 0.35);
}

/* ===================================================================
   通用区块标题
   =================================================================== */
section { padding: 70px 0; }
.section-title {
  text-align: center;
  font-size: clamp(26px, 4vw, 38px);
  font-weight: 800;
  letter-spacing: 4px;
  color: var(--spark-gold);
  margin-bottom: 12px;
  text-shadow:
    0 0 10px rgba(255, 69, 0, 0.4),
    0 0 20px rgba(255, 140, 0, 0.2);
}
.section-subtitle {
  text-align: center;
  color: var(--text-dim);
  font-size: 15px;
  letter-spacing: 2px;
  margin-bottom: 44px;
}

/* ===================================================================
   3. 倒计时（集成在 Hero 内）
   =================================================================== */
.hero-countdown {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}
.count-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 96px;
  padding: 18px 10px;
  /* 深色底 + 红橙边框 + 发光 */
  background: rgba(13, 6, 4, 0.8);
  border: 1px solid var(--border-flame);
  border-radius: var(--radius);
  box-shadow:
    0 0 14px rgba(255, 69, 0, 0.15),
    inset 0 0 10px rgba(255, 69, 0, 0.05);
}
.count-num {
  font-size: clamp(34px, 6vw, 54px);
  font-weight: 900;
  color: var(--flame-orange);
  line-height: 1;
  font-variant-numeric: tabular-nums;
  /* 发光数字 */
  text-shadow:
    0 0 8px rgba(255, 140, 0, 0.6),
    0 0 16px rgba(255, 69, 0, 0.4);
}
.count-label {
  margin-top: 8px;
  font-size: 14px;
  color: var(--text-dim);
  letter-spacing: 2px;
}
.count-sep {
  font-size: 40px;
  font-weight: 900;
  color: var(--flame-red);
  text-shadow: 0 0 8px rgba(255, 69, 0, 0.5);
}
.countdown-status {
  text-align: center;
  margin-top: 0;
  margin-bottom: 28px;
  font-size: 17px;
  color: var(--flame-orange);
  letter-spacing: 1px;
  min-height: 26px;
}
.countdown-status.status-live {
  color: var(--flame-red);
  font-weight: 700;
  animation: livePulse 1.2s ease-in-out infinite;
  text-shadow: 0 0 8px rgba(255, 69, 0, 0.5);
}
@keyframes livePulse {
  0%, 100% { opacity: 0.85; }
  50% { opacity: 1; }
}

/* ===================================================================
   4. 服务器信息卡
   =================================================================== */
.server-info { padding-top: 30px; padding-bottom: 30px; }
.info-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.info-card {
  text-align: center;
  padding: 30px 20px;
  /* 深色半透明 + 红橙边框 + 火焰发光 */
  background: var(--bg-card);
  border: 1px solid var(--border-flame);
  border-radius: var(--radius);
  box-shadow:
    var(--shadow-soft),
    inset 0 0 12px rgba(255, 69, 0, 0.04);
  transition: transform .3s, box-shadow .3s, border-color .3s, background .3s;
}
.info-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-flame-hover);
  box-shadow:
    var(--shadow-hover),
    0 0 24px rgba(255, 140, 0, 0.2);
  background: var(--bg-card-hover);
}
.info-icon {
  font-size: 38px;
  margin-bottom: 12px;
  color: var(--flame-orange);
  text-shadow:
    0 0 10px rgba(255, 69, 0, 0.5),
    0 0 20px rgba(255, 140, 0, 0.3);
}
.info-label {
  font-size: 14px;
  color: var(--text-dim);
  letter-spacing: 1px;
  margin-bottom: 6px;
}
.info-value {
  font-size: 17px;
  font-weight: 600;
  color: var(--spark-gold);
}
.info-none {
  color: var(--text-dim);
  font-weight: 400;
}
.group-link {
  color: var(--spark-gold);
  font-weight: 600;
}
.group-link:hover {
  color: var(--flame-orange);
  text-shadow: 0 0 8px rgba(255, 140, 0, 0.4);
}

/* ===================================================================
   5. 游戏特色
   =================================================================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
}
.feature-card {
  display: flex;
  align-items: flex-start;
  gap: 18px;
  padding: 26px;
  /* 深色半透明 + 红橙边框 + 火焰发光 */
  background: var(--bg-card);
  border: 1px solid var(--border-flame);
  border-radius: var(--radius);
  box-shadow:
    var(--shadow-soft),
    inset 0 0 12px rgba(255, 69, 0, 0.04);
  transition: transform .3s, box-shadow .3s, border-color .3s, background .3s;
}
.feature-card:hover {
  transform: translateY(-8px);
  border-color: var(--border-flame-hover);
  box-shadow:
    var(--shadow-hover),
    0 0 24px rgba(255, 140, 0, 0.2);
  background: var(--bg-card-hover);
}
.feature-num {
  flex-shrink: 0;
  width: 48px; height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 900;
  color: #ffffff;
  background: linear-gradient(135deg, var(--flame-red), var(--flame-orange));
  border-radius: 50%;
  box-shadow:
    0 4px 12px rgba(255, 69, 0, 0.4),
    0 0 16px rgba(255, 140, 0, 0.3);
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}
.feature-text {
  font-size: 16px;
  color: var(--text);
  line-height: 1.8;
  padding-top: 4px;
}
.feature-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--spark-gold);
  margin-bottom: 6px;
  letter-spacing: 1px;
}
.feature-desc {
  color: var(--text);
  line-height: 1.8;
}

/* ===================================================================
   6. 下载中心
   =================================================================== */
.download-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}
.download-card {
  padding: 30px 22px;
  text-align: center;
  /* 深色半透明 + 红橙边框 + 火焰发光 */
  background: var(--bg-card);
  border: 1px solid var(--border-flame);
  border-radius: var(--radius);
  box-shadow:
    var(--shadow-soft),
    inset 0 0 12px rgba(255, 69, 0, 0.04);
  transition: transform .3s, box-shadow .3s, border-color .3s, background .3s;
}
.download-card:hover {
  transform: translateY(-8px);
  border-color: var(--border-flame-hover);
  box-shadow:
    var(--shadow-hover),
    0 0 24px rgba(255, 140, 0, 0.2);
  background: var(--bg-card-hover);
}
.dl-icon {
  font-size: 40px;
  color: var(--flame-orange);
  margin-bottom: 12px;
  text-shadow:
    0 0 10px rgba(255, 69, 0, 0.5),
    0 0 20px rgba(255, 140, 0, 0.3);
}
.dl-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--spark-gold);
  margin-bottom: 12px;
  letter-spacing: 1px;
}

/* ===================================================================
   7. 友情链接
   =================================================================== */
.links { padding: 50px 0; }
.links-title {
  text-align: center;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 3px;
  color: var(--spark-gold);
  margin-bottom: 24px;
  text-shadow: 0 0 10px rgba(255, 69, 0, 0.3);
}
.links-box {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
}
.link-item {
  padding: 7px 20px;
  font-size: 14px;
  color: var(--text-dim);
  background: var(--bg-card);
  border: 1px solid var(--border-flame);
  border-radius: 18px;
  transition: all .25s;
}
.link-item:hover {
  color: var(--spark-gold);
  border-color: var(--border-flame-hover);
  box-shadow: 0 0 12px rgba(255, 140, 0, 0.2);
  background: var(--bg-card-hover);
}
.links-empty { color: var(--text-dim); }

/* ===================================================================
   8. 页脚
   =================================================================== */
.footer {
  padding: 50px 0 26px;
  background: rgba(13, 6, 4, 0.85);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  /* 红色分隔线 */
  border-top: 2px solid var(--flame-red);
  box-shadow:
    0 -4px 24px rgba(255, 69, 0, 0.1),
    inset 0 4px 12px rgba(255, 69, 0, 0.05);
}
.footer-main {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 24px;
  padding-bottom: 26px;
  border-bottom: 1px dashed rgba(255, 69, 0, 0.2);
}
.footer-brand h3 {
  font-size: 24px;
  font-weight: 900;
  letter-spacing: 3px;
  color: var(--spark-gold);
  margin-bottom: 6px;
  text-shadow: 0 0 10px rgba(255, 69, 0, 0.3);
}
.footer-brand p {
  color: var(--text-dim);
  font-size: 14px;
  letter-spacing: 1px;
}
.footer-contact p {
  font-size: 14px;
  color: var(--text-dim);
  margin-bottom: 6px;
}
.contact-val {
  color: var(--flame-orange);
  font-weight: 600;
}
.footer-bottom {
  padding-top: 20px;
  text-align: center;
  font-size: 13px;
  color: var(--text-dim);
}
.footer-bottom p { margin-bottom: 4px; }

/* ===================================================================
   9. 悬浮客服面板
   =================================================================== */
.service-fab {
  position: fixed;
  right: 24px;
  bottom: 90px;
  z-index: 99;
}
.fab-btn {
  width: 56px; height: 56px;
  border-radius: 50%;
  border: 1px solid rgba(255, 200, 100, 0.3);
  background: linear-gradient(135deg, var(--flame-red), var(--flame-orange));
  color: #ffffff;
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 1px;
  cursor: pointer;
  box-shadow:
    0 4px 16px rgba(255, 69, 0, 0.4),
    0 0 20px rgba(255, 140, 0, 0.25);
  transition: transform .25s, box-shadow .25s;
}
.fab-btn:hover {
  transform: scale(1.08);
  box-shadow:
    0 6px 24px rgba(255, 69, 0, 0.55),
    0 0 28px rgba(255, 140, 0, 0.4);
}
.fab-panel {
  position: absolute;
  right: 0;
  bottom: 70px;
  width: 240px;
  padding: 20px;
  background: rgba(13, 6, 4, 0.96);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border-flame);
  border-radius: var(--radius);
  box-shadow:
    0 10px 36px rgba(255, 69, 0, 0.2),
    0 0 20px rgba(255, 140, 0, 0.1);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity .3s, transform .3s, visibility .3s;
}
.service-fab.open .fab-panel {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.fab-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--spark-gold);
  text-align: center;
  letter-spacing: 2px;
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px dashed rgba(255, 69, 0, 0.2);
}
.fab-qq-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 12px;
}
.fab-qq-item {
  display: block;
  padding: 8px 12px;
  font-size: 14px;
  text-align: center;
  color: var(--flame-orange);
  background: rgba(255, 69, 0, 0.06);
  border: 1px solid var(--border-flame);
  border-radius: 6px;
  transition: background .25s, color .25s, box-shadow .25s;
}
.fab-qq-item:hover {
  color: #ffffff;
  background: linear-gradient(135deg, var(--flame-red), var(--flame-orange));
  box-shadow: 0 0 12px rgba(255, 140, 0, 0.3);
}
.fab-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 7px 0;
  font-size: 14px;
  border-bottom: 1px dotted rgba(255, 69, 0, 0.12);
}
.fab-row:last-child { border-bottom: none; }
.fab-label { color: var(--text-dim); }
.fab-val { color: var(--flame-orange); font-weight: 600; }

/* ---------- 返回顶部 ---------- */
.back-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 46px; height: 46px;
  border-radius: 50%;
  border: 1px solid var(--border-flame);
  background: rgba(13, 6, 4, 0.8);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: var(--flame-orange);
  font-size: 20px;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity .3s, transform .3s, visibility .3s, box-shadow .25s, background .25s;
  z-index: 98;
}
.back-top.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.back-top:hover {
  box-shadow: 0 0 16px rgba(255, 69, 0, 0.3);
  background: rgba(45, 18, 8, 0.95);
  color: var(--spark-gold);
}

/* ===================================================================
   滚动渐入动画
   =================================================================== */
.reveal {
  opacity: 0;
  transform: translateY(36px);
  transition: opacity .7s ease, transform .7s ease;
}
.reveal.reveal-in {
  opacity: 1;
  transform: translateY(0);
}

/* ===================================================================
   响应式 - 平板
   =================================================================== */
@media (max-width: 992px) {
  .download-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ===================================================================
   响应式 - 手机
   =================================================================== */
@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  .nav-menu {
    position: fixed;
    top: var(--nav-h); right: 0;
    flex-direction: column;
    width: 200px;
    padding: 16px;
    gap: 4px;
    background: rgba(13, 6, 4, 0.96);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-left: 1px solid var(--border-flame);
    border-bottom: 1px solid var(--border-flame);
    box-shadow: -4px 8px 24px rgba(255, 69, 0, 0.12);
    transform: translateX(110%);
    transition: transform .35s ease;
  }
  .nav-menu.open { transform: translateX(0); }
  .nav-link { padding: 12px 16px; }

  .hero { min-height: 88vh; padding-top: 90px; }
  .hero-opentime {
    flex-direction: column;
    gap: 6px;
    padding: 10px 18px;
  }

  .info-grid { grid-template-columns: 1fr; }
  .features-grid { grid-template-columns: 1fr; }
  .download-grid { grid-template-columns: 1fr; }

  .count-item { min-width: 70px; padding: 14px 6px; }
  .count-sep { font-size: 28px; }
  .section-title { letter-spacing: 2px; }

  .footer-main { flex-direction: column; }
  .service-fab { right: 16px; bottom: 80px; }
  .back-top { right: 16px; bottom: 18px; }
}

@media (max-width: 420px) {
  .hero-title { letter-spacing: 3px; }
  .btn { padding: 12px 30px; font-size: 15px; }
  .hero-countdown { gap: 6px; }
}