/* ============================================================
   Weverse 下载单页样式
   主题:深邃暗夜 × Weverse 薄荷绿
   ============================================================ */

:root {
  --green: #00e78b;
  --green-dark: #00c476;
  --green-soft: rgba(0, 231, 139, 0.12);
  --bg: #0b0f14;
  --bg-alt: #10161d;
  --card: #141b23;
  --border: rgba(255, 255, 255, 0.08);
  --text: #eef3f7;
  --text-muted: #9aa8b5;
  --radius: 16px;
  --shadow: 0 10px 40px rgba(0, 0, 0, 0.35);
  --header-h: 64px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h) + 12px); }

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }

.container { width: min(1140px, 92%); margin: 0 auto; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 26px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 15px;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
  cursor: pointer;
  white-space: nowrap;
}
.btn-lg { padding: 15px 34px; font-size: 16px; }
.btn-primary {
  background: linear-gradient(135deg, var(--green), var(--green-dark));
  color: #062015;
  box-shadow: 0 6px 24px rgba(0, 231, 139, 0.35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 32px rgba(0, 231, 139, 0.5); }
.btn-ghost {
  border: 1px solid rgba(255, 255, 255, 0.25);
  color: var(--text);
  background: rgba(255, 255, 255, 0.04);
  backdrop-filter: blur(6px);
}
.btn-ghost:hover { border-color: var(--green); color: var(--green); }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(11, 15, 20, 0.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .3s ease;
}
.site-header.scrolled { border-bottom-color: var(--border); }
.nav { display: flex; align-items: center; justify-content: space-between; height: var(--header-h); }
.nav-logo { display: flex; align-items: center; gap: 10px; font-size: 18px; font-weight: 700; letter-spacing: .5px; }
.nav-logo img { border-radius: 9px; }
.logo-dot { color: var(--green); margin-left: 4px; font-weight: 500; font-size: 15px; }
.nav-menu { display: flex; align-items: center; gap: 30px; }
.nav-menu a { font-size: 15px; color: var(--text-muted); transition: color .2s; }
.nav-menu a:hover { color: var(--green); }
.nav-cta {
  background: var(--green);
  color: #062015 !important;
  padding: 8px 20px;
  border-radius: 999px;
  font-weight: 600;
}
.nav-cta:hover { background: var(--green-dark); }
.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 8px; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--text); margin: 5px 0; border-radius: 2px; transition: .3s; }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: calc(var(--header-h) + 60px) 0 80px;
  overflow: hidden;
}
.hero-bg {
  position: absolute; inset: 0;
  background: url("../images/hero-concert.png") center/cover no-repeat;
  transform: scale(1.05);
  animation: heroZoom 18s ease-in-out infinite alternate;
}
@keyframes heroZoom { from { transform: scale(1.05); } to { transform: scale(1.12); } }
.hero-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(105deg, rgba(11,15,20,.96) 25%, rgba(11,15,20,.75) 55%, rgba(11,15,20,.45) 100%);
}
.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: 1.15fr .85fr;
  gap: 48px;
  align-items: center;
}
.hero-badge {
  display: inline-block;
  padding: 6px 16px;
  border: 1px solid var(--green);
  border-radius: 999px;
  color: var(--green);
  font-size: 13px;
  letter-spacing: 2px;
  margin-bottom: 20px;
  background: var(--green-soft);
}
.hero h1 {
  font-size: clamp(38px, 5.5vw, 60px);
  line-height: 1.2;
  letter-spacing: 1px;
  margin-bottom: 18px;
  background: linear-gradient(120deg, #fff 40%, var(--green));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-sub { font-size: clamp(15px, 1.6vw, 18px); color: var(--text-muted); margin-bottom: 34px; }
.hero-sub strong { color: var(--green); font-weight: 700; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 46px; }
.hero-stats { display: flex; gap: 40px; flex-wrap: wrap; }
.hero-stats li { display: flex; flex-direction: column; }
.hero-stats strong { font-size: 30px; color: var(--green); line-height: 1.2; }
.hero-stats span { font-size: 13px; color: var(--text-muted); }
.hero-visual img {
  border-radius: 24px;
  box-shadow: var(--shadow), 0 0 80px rgba(0, 231, 139, 0.18);
  animation: floatY 5s ease-in-out infinite;
}
@keyframes floatY { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-14px); } }

/* ---------- 通用 Section ---------- */
.section { padding: 96px 0; }
.section-alt { background: var(--bg-alt); }
.section-head { text-align: center; margin-bottom: 56px; }
.section-tag {
  color: var(--green);
  font-size: 13px;
  letter-spacing: 4px;
  font-weight: 600;
  margin-bottom: 10px;
}
.section-head h2 { font-size: clamp(26px, 3.4vw, 38px); letter-spacing: 1px; }
.section-desc { color: var(--text-muted); margin-top: 12px; font-size: 15px; }

/* ---------- 软件介绍 ---------- */
.intro-grid {
  display: grid;
  grid-template-columns: 1.2fr .8fr;
  gap: 48px;
  align-items: center;
}
.intro-text p { color: var(--text-muted); margin-bottom: 18px; font-size: 16px; }
.intro-text strong { color: var(--text); }
.intro-highlights {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}
.intro-highlights li {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px 20px;
  text-align: center;
  transition: transform .25s ease, border-color .25s ease;
}
.intro-highlights li:hover { transform: translateY(-4px); border-color: var(--green); }
.hl-num { display: block; font-size: 28px; font-weight: 700; color: var(--green); margin-bottom: 6px; }
.hl-label { font-size: 13px; color: var(--text-muted); }

/* ---------- 功能介绍 ---------- */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.feature-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
  transition: transform .25s ease, border-color .25s ease, box-shadow .25s ease;
}
.feature-card:hover {
  transform: translateY(-6px);
  border-color: rgba(0, 231, 139, 0.45);
  box-shadow: 0 14px 40px rgba(0, 0, 0, 0.3);
}
.feature-icon {
  width: 52px; height: 52px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 14px;
  background: var(--green-soft);
  color: var(--green);
  margin-bottom: 20px;
}
.feature-icon svg { width: 26px; height: 26px; }
.feature-card h3 { font-size: 18px; margin-bottom: 12px; }
.feature-card p { font-size: 14.5px; color: var(--text-muted); }
.feature-card strong { color: var(--green); font-weight: 600; }

/* ---------- 使用教程 ---------- */
.steps { max-width: 820px; margin: 0 auto; position: relative; }
.steps::before {
  content: "";
  position: absolute;
  left: 35px; top: 40px; bottom: 40px;
  width: 2px;
  background: linear-gradient(to bottom, var(--green), rgba(0,231,139,.08));
}
.step {
  display: flex;
  gap: 28px;
  padding: 28px 0;
  position: relative;
}
.step-num {
  flex-shrink: 0;
  width: 72px; height: 72px;
  display: flex; align-items: center; justify-content: center;
  font-size: 22px; font-weight: 700;
  color: #062015;
  background: linear-gradient(135deg, var(--green), var(--green-dark));
  border-radius: 50%;
  box-shadow: 0 0 0 8px var(--green-soft);
  z-index: 1;
}
.step-body {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 28px;
  flex: 1;
}
.step-body h3 { font-size: 18px; margin-bottom: 10px; }
.step-body p { color: var(--text-muted); font-size: 15px; }
.step-body strong { color: var(--green); }

/* ---------- FAQ ---------- */
.faq-list { max-width: 820px; margin: 0 auto; display: flex; flex-direction: column; gap: 14px; }
.faq-item {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color .25s ease;
}
.faq-item[open] { border-color: rgba(0, 231, 139, 0.45); }
.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 26px;
  cursor: pointer;
  list-style: none;
  user-select: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary h3 { font-size: 16.5px; font-weight: 600; }
.faq-arrow {
  flex-shrink: 0;
  width: 10px; height: 10px;
  border-right: 2px solid var(--green);
  border-bottom: 2px solid var(--green);
  transform: rotate(45deg);
  transition: transform .3s ease;
  margin-top: -4px;
}
.faq-item[open] .faq-arrow { transform: rotate(225deg); margin-top: 4px; }
.faq-answer {
  padding: 0 26px 22px;
  color: var(--text-muted);
  font-size: 15px;
  border-top: 1px dashed var(--border);
  padding-top: 16px;
  margin: 0 26px 22px;
  padding-left: 0; padding-right: 0;
}

/* ---------- 下载板块 ---------- */
.download-section {
  background:
    radial-gradient(600px 300px at 20% 20%, rgba(0,231,139,.12), transparent 60%),
    radial-gradient(500px 260px at 85% 80%, rgba(0,231,139,.08), transparent 60%),
    var(--bg);
}
.download-card {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 40px;
  background: var(--card);
  border: 1px solid rgba(0, 231, 139, 0.25);
  border-radius: 24px;
  padding: 48px;
  box-shadow: var(--shadow), 0 0 60px rgba(0, 231, 139, 0.08);
}
.download-info { display: flex; gap: 28px; align-items: flex-start; flex: 1; }
.download-icon { border-radius: 20px; box-shadow: 0 8px 24px rgba(0,0,0,.4); flex-shrink: 0; }
.download-meta h3 { font-size: 24px; margin-bottom: 14px; }
.meta-list { margin-bottom: 24px; }
.meta-list li {
  display: flex;
  gap: 14px;
  font-size: 14.5px;
  padding: 5px 0;
}
.meta-list span { color: var(--text-muted); min-width: 70px; }
.meta-list strong { color: var(--text); font-weight: 500; }
.btn-download { font-size: 17px; }
.safe-tip { margin-top: 14px; font-size: 13px; color: var(--green); }
.download-qr {
  text-align: center;
  color: var(--text-muted);
  font-size: 14px;
  flex-shrink: 0;
}
.qr-frame {
  background: #fff;
  padding: 14px;
  border-radius: 18px;
  margin-bottom: 12px;
  box-shadow: 0 0 0 1px var(--border), 0 8px 30px rgba(0, 231, 139, 0.15);
}

/* ---------- 页脚 ---------- */
.site-footer { border-top: 1px solid var(--border); padding: 48px 0 28px; background: var(--bg-alt); }
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 28px;
  flex-wrap: wrap;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--border);
}
.footer-brand { display: flex; align-items: center; gap: 14px; }
.footer-brand img { border-radius: 8px; }
.footer-brand p { font-size: 13px; color: var(--text-muted); }
.footer-nav { display: flex; gap: 24px; flex-wrap: wrap; }
.footer-nav a { font-size: 14px; color: var(--text-muted); transition: color .2s; }
.footer-nav a:hover { color: var(--green); }
.footer-copy { padding-top: 22px; text-align: center; font-size: 12.5px; color: #5d6b78; }

/* ---------- 移动端悬浮下载按钮 ---------- */
.float-download {
  display: none;
  position: fixed;
  right: 18px; bottom: 22px;
  z-index: 90;
  align-items: center;
  gap: 6px;
  padding: 13px 22px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--green), var(--green-dark));
  color: #062015;
  font-weight: 700;
  font-size: 15px;
  box-shadow: 0 8px 28px rgba(0, 231, 139, 0.45);
}

/* ---------- 滚动显现动画 ---------- */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .7s ease, transform .7s ease; }
.reveal.visible { opacity: 1; transform: none; }

/* ============================================================
   响应式适配
   ============================================================ */
@media (max-width: 960px) {
  .hero-inner { grid-template-columns: 1fr; text-align: center; }
  .hero-actions, .hero-stats { justify-content: center; }
  .hero-visual { max-width: 320px; margin: 0 auto; }
  .intro-grid { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .download-card { flex-direction: column; padding: 36px 28px; }
}

@media (max-width: 640px) {
  .section { padding: 64px 0; }
  .nav-toggle { display: block; }
  .nav-menu {
    position: fixed;
    top: var(--header-h); left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: rgba(11, 15, 20, 0.97);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
    padding: 10px 0;
    transform: translateY(-130%);
    transition: transform .35s ease;
  }
  .nav-menu.open { transform: translateY(0); }
  .nav-menu li { width: 100%; }
  .nav-menu a { display: block; padding: 14px 6%; font-size: 16px; }
  .nav-cta { margin: 8px 6%; text-align: center; }
  .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); }

  .feature-grid { grid-template-columns: 1fr; }
  .hero { min-height: auto; padding-bottom: 60px; }
  .hero-stats { gap: 24px; }
  .hero-stats strong { font-size: 24px; }
  .steps::before { left: 27px; }
  .step { gap: 18px; }
  .step-num { width: 56px; height: 56px; font-size: 17px; box-shadow: 0 0 0 6px var(--green-soft); }
  .step-body { padding: 18px 20px; }
  .download-info { flex-direction: column; align-items: center; text-align: center; }
  .meta-list li { justify-content: center; }
  .float-download { display: inline-flex; }
}