/* ============================================================
   绿茶VPN / 绿茶加速器 官方网站 全局样式
   主题：清新绿茶绿 · 现代 · 响应式
   ============================================================ */

:root {
  --green-900: #0c3d2b;
  --green-800: #0f5c3e;
  --green-700: #137a52;
  --green-600: #179a67;
  --green-500: #1fb57a;
  --green-400: #3fce8f;
  --green-300: #7fdfb2;
  --green-200: #b7eed3;
  --green-100: #dff7ec;
  --green-50:  #f0fbf6;
  --ink:       #15291f;
  --ink-soft:  #4a5f55;
  --ink-mute:  #71857a;
  --line:      #e4efe9;
  --bg:        #ffffff;
  --bg-soft:   #f6fbf8;
  --accent:    #f5a623;
  --shadow-sm: 0 2px 10px rgba(15, 92, 62, 0.06);
  --shadow-md: 0 10px 30px rgba(15, 92, 62, 0.10);
  --radius:    16px;
  --radius-sm: 10px;
}

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

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
  font-size: 16px;
}

a { color: var(--green-700); text-decoration: none; transition: color .18s ease; }
a:hover { color: var(--green-500); }

img, svg { max-width: 100%; display: block; }

.container { width: 100%; max-width: 1180px; margin: 0 auto; padding: 0 22px; }

/* ---------- 页头 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--line);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 20px; color: var(--green-800); }
.brand .logo {
  width: 36px; height: 36px; border-radius: 10px; overflow: hidden;
  display: grid; place-items: center; background: var(--green-600); flex: 0 0 auto;
}
.brand .logo svg { width: 22px; height: 22px; }
.brand small { display: block; font-size: 11px; font-weight: 500; color: var(--ink-mute); letter-spacing: 1px; }

.nav { display: flex; align-items: center; gap: 6px; }
.nav a {
  display: inline-block; padding: 8px 14px; border-radius: 8px;
  font-weight: 600; font-size: 15px; color: var(--ink-soft);
}
.nav a:hover { background: var(--green-50); color: var(--green-700); }
.nav a.active { color: var(--green-700); background: var(--green-100); }
.nav .btn-dl {
  margin-left: 8px; padding: 9px 18px; border-radius: 999px;
  background: var(--green-600); color: #fff !important;
  box-shadow: 0 6px 16px rgba(23, 154, 103, .28);
}
.nav .btn-dl:hover { background: var(--green-700); }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 13px 28px; border-radius: 999px; font-weight: 700; font-size: 16px;
  cursor: pointer; border: none; transition: transform .15s ease, box-shadow .2s ease, background .2s ease;
}
.btn-primary { background: var(--green-600); color: #fff; box-shadow: 0 10px 24px rgba(23, 154, 103, .30); }
.btn-primary:hover { background: var(--green-700); color: #fff; transform: translateY(-2px); }
.btn-accent { background: var(--accent); color: #fff; box-shadow: 0 10px 24px rgba(245, 166, 35, .30); }
.btn-accent:hover { background: #e3961c; color: #fff; transform: translateY(-2px); }
.btn-ghost { background: #fff; color: var(--green-700); border: 1.5px solid var(--green-300); }
.btn-ghost:hover { background: var(--green-50); transform: translateY(-2px); }
.btn-lg { padding: 16px 34px; font-size: 17px; }
.btn-sm { padding: 9px 18px; font-size: 14px; }

/* ---------- Hero ---------- */
.hero {
  position: relative; overflow: hidden;
  background: radial-gradient(1200px 600px at 80% -10%, #dff7ec 0%, transparent 55%),
              radial-gradient(900px 500px at -10% 110%, #eafbf4 0%, transparent 50%),
              linear-gradient(180deg, #ffffff 0%, #f6fbf8 100%);
  padding: 70px 0 60px;
}
.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 40px; align-items: center; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--green-100); color: var(--green-800);
  padding: 6px 14px; border-radius: 999px; font-size: 13px; font-weight: 600;
}
.hero h1 { font-size: 46px; line-height: 1.18; font-weight: 800; color: var(--green-900); margin: 18px 0 16px; }
.hero h1 .hl { color: var(--green-600); }
.hero .lead { font-size: 18px; color: var(--ink-soft); max-width: 560px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 28px; }
.hero-stats { display: flex; gap: 28px; flex-wrap: wrap; margin-top: 30px; }
.hero-stats .stat b { display: block; font-size: 26px; color: var(--green-700); font-weight: 800; }
.hero-stats .stat span { font-size: 13px; color: var(--ink-mute); }

.hero-art { position: relative; }
.hero-art .card {
  background: #fff; border-radius: 22px; box-shadow: var(--shadow-md);
  padding: 26px; border: 1px solid var(--line);
}
.hero-art .mock-status {
  display: flex; align-items: center; gap: 10px; font-weight: 700; color: var(--green-700);
  margin-bottom: 18px;
}
.ping-dot { width: 12px; height: 12px; border-radius: 50%; background: var(--green-400); box-shadow: 0 0 0 0 rgba(63,206,143,.5); animation: pulse 1.8s infinite; }
@keyframes pulse { 0%{box-shadow:0 0 0 0 rgba(63,206,143,.5)} 70%{box-shadow:0 0 0 12px rgba(63,206,143,0)} 100%{box-shadow:0 0 0 0 rgba(63,206,143,0)} }
.hero-art .row { display: flex; justify-content: space-between; align-items: center; padding: 12px 0; border-bottom: 1px dashed var(--line); font-size: 14px; }
.hero-art .row .tag { font-size: 12px; background: var(--green-50); color: var(--green-700); padding: 3px 9px; border-radius: 6px; }
.hero-art .row .bar { height: 8px; border-radius: 4px; background: var(--green-200); overflow: hidden; width: 120px; }
.hero-art .row .bar i { display: block; height: 100%; background: var(--green-500); border-radius: 4px; }

/* ---------- 分区通用 ---------- */
.section { padding: 64px 0; }
.section.alt { background: var(--bg-soft); }
.section-head { max-width: 720px; margin: 0 auto 42px; text-align: center; }
.section-head h2 { font-size: 32px; font-weight: 800; color: var(--green-900); margin-bottom: 12px; }
.section-head p { color: var(--ink-mute); font-size: 16px; }

/* ---------- 特性卡片 ---------- */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.feature-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 28px 24px; transition: transform .2s ease, box-shadow .2s ease;
}
.feature-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
.feature-card .icon {
  width: 54px; height: 54px; border-radius: 14px; display: grid; place-items: center;
  background: var(--green-100); color: var(--green-700); margin-bottom: 16px;
}
.feature-card .icon svg { width: 28px; height: 28px; }
.feature-card h3 { font-size: 19px; font-weight: 700; color: var(--green-900); margin-bottom: 8px; }
.feature-card p { font-size: 14.5px; color: var(--ink-soft); }

/* ---------- 问答区 ---------- */
.qa-list { display: grid; gap: 18px; }
.qa-item {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px 28px; box-shadow: var(--shadow-sm);
}
.qa-item .q {
  display: flex; gap: 14px; align-items: flex-start;
  font-size: 18px; font-weight: 700; color: var(--green-900); margin-bottom: 16px;
}
.qa-item .q .num {
  flex: 0 0 auto; width: 30px; height: 30px; border-radius: 8px; display: grid; place-items: center;
  background: var(--green-600); color: #fff; font-size: 14px; font-weight: 700; margin-top: 2px;
}
.qa-steps { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.qa-steps .step {
  display: flex; gap: 10px; background: var(--green-50); border-radius: 12px; padding: 12px 14px;
  font-size: 14.5px; color: var(--ink-soft);
}
.qa-steps .step b { flex: 0 0 auto; color: var(--green-700); font-weight: 800; }

/* ---------- 分类标签 ---------- */
.cat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 30px; }
.cat-card {
  border: 1px solid var(--line); border-radius: var(--radius); background: #fff; padding: 24px;
  transition: transform .2s ease, box-shadow .2s ease;
}
.cat-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.cat-card h4 { font-size: 17px; color: var(--green-800); margin-bottom: 6px; }
.cat-card p { font-size: 14px; color: var(--ink-mute); }

/* ---------- 下载卡片 ---------- */
.dl-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 30px 24px; text-align: center; transition: transform .2s ease, box-shadow .2s ease;
}
.dl-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
.dl-card .icon { width: 60px; height: 60px; margin: 0 auto 16px; border-radius: 16px; background: var(--green-100); color: var(--green-700); display: grid; place-items: center; }
.dl-card .icon svg { width: 32px; height: 32px; }
.dl-card h3 { font-size: 18px; margin-bottom: 6px; }
.dl-card p { font-size: 13px; color: var(--ink-mute); margin-bottom: 18px; }

/* ---------- 表格 ---------- */
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); }
table { width: 100%; border-collapse: collapse; background: #fff; }
th, td { padding: 14px 18px; text-align: left; border-bottom: 1px solid var(--line); font-size: 14.5px; }
th { background: var(--green-50); color: var(--green-800); font-weight: 700; }
tr:last-child td { border-bottom: none; }

/* ---------- CTA 横幅 ---------- */
.cta-banner {
  background: linear-gradient(135deg, var(--green-700), var(--green-500));
  border-radius: 24px; padding: 50px 40px; color: #fff; text-align: center;
  box-shadow: var(--shadow-md);
}
.cta-banner h2 { font-size: 30px; font-weight: 800; margin-bottom: 12px; color: #fff; }
.cta-banner p { opacity: .92; margin-bottom: 26px; font-size: 16px; }
.cta-banner .btn { background: #fff; color: var(--green-700); }
.cta-banner .btn:hover { background: var(--green-100); }

/* ---------- 页脚 ---------- */
.site-footer { background: var(--green-900); color: #cfe6dc; padding: 54px 0 30px; margin-top: 20px; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 30px; }
.site-footer h4 { color: #fff; font-size: 15px; margin-bottom: 16px; }
.site-footer a { color: #cfe6dc; display: block; padding: 4px 0; font-size: 14px; }
.site-footer a:hover { color: #fff; }
.site-footer .brand { color: #fff; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.12); margin-top: 36px; padding-top: 22px;
  display: flex; justify-content: space-between; gap: 14px; flex-wrap: wrap;
  font-size: 13px; color: #8fb5a4;
}
.footer-bottom a { display: inline; color: #8fb5a4; }

/* ---------- 面包屑 / 页面头 ---------- */
.page-hero {
  background: radial-gradient(900px 400px at 70% -20%, #dff7ec 0%, transparent 55%), var(--bg-soft);
  padding: 54px 0 40px; text-align: center;
}
.page-hero h1 { font-size: 38px; font-weight: 800; color: var(--green-900); margin-bottom: 10px; }
.page-hero p { color: var(--ink-mute); max-width: 640px; margin: 0 auto; }
.breadcrumb { font-size: 13px; color: var(--ink-mute); margin-bottom: 10px; }
.breadcrumb a { color: var(--green-700); }

/* ---------- 响应式 ---------- */
@media (max-width: 960px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 36px; }
  .grid-3, .grid-4, .cat-grid { grid-template-columns: repeat(2, 1fr); }
  .grid-2, .qa-steps { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .nav { gap: 2px; }
  .nav a { padding: 8px 10px; font-size: 14px; }
}
@media (max-width: 640px) {
  .grid-3, .grid-4, .cat-grid, .footer-grid { grid-template-columns: 1fr; }
  .header-inner { height: auto; padding: 12px 0; flex-direction: column; gap: 10px; }
  .nav { flex-wrap: wrap; justify-content: center; }
  .hero { padding: 40px 0; }
  .hero h1 { font-size: 30px; }
  .section { padding: 44px 0; }
  .section-head h2 { font-size: 26px; }
}