/* SafeW-dd.com.cn —— 暗码终端 · 暗色加密电报站
   深空黑底 + 琥珀磷光 + 青绿磷光 + 信号红 */

:root {
  --bg: #0a0e16;
  --bg2: #0e1420;
  --surface: #121a2a;
  --surface2: #182236;
  --border: rgba(148, 163, 184, 0.14);
  --border-strong: rgba(148, 163, 184, 0.24);
  --text: #e8edf5;
  --muted: #98a4b8;
  --dim: #6b7789;
  --amber: #e8a33d;
  --amber-soft: #f3c475;
  --teal: #3fbf9c;
  --red: #e05b4e;
  --mono: "SFMono-Regular", "Consolas", "Liberation Mono", "Courier New", monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", sans-serif;
  --radius: 14px;
  --shadow: 0 12px 40px rgba(0, 0, 0, 0.45);
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--teal); text-decoration: none; }
a:hover { color: var(--amber); }
img { max-width: 100%; display: block; }

.wrap { max-width: 1160px; margin: 0 auto; padding: 0 24px; }

/* ---------- 导航 ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(10, 14, 22, 0.82);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
.nav-inner { display: flex; align-items: center; gap: 28px; height: 66px; }
.brand {
  display: flex; align-items: center; gap: 10px;
  font-weight: 700; font-size: 19px; letter-spacing: 0.4px; color: var(--text);
}
.brand:hover { color: var(--amber); }
.brand img { border-radius: 8px; }
.nav-links { flex: 1; }
.nav-links ul { display: flex; gap: 24px; list-style: none; }
.nav-links a { color: var(--muted); font-size: 15px; }
.nav-links a:hover { color: var(--text); }
.nav-cta { white-space: nowrap; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 11px 22px; border-radius: 10px; font-size: 15px; font-weight: 600;
  border: 1px solid transparent; cursor: pointer; transition: transform .15s ease, box-shadow .15s ease, background .15s ease;
}
.btn svg { width: 17px; height: 17px; flex: 0 0 auto; }
.btn:hover { transform: translateY(-1px); }
.btn-primary {
  background: linear-gradient(135deg, var(--amber), #c97f1f);
  color: #1a1206; box-shadow: 0 6px 20px rgba(232, 163, 61, 0.28);
}
.btn-primary:hover { box-shadow: 0 10px 28px rgba(232, 163, 61, 0.4); color: #1a1206; }
.btn-ghost { border-color: var(--border-strong); color: var(--text); background: transparent; }
.btn-ghost:hover { background: var(--surface); border-color: var(--amber); color: var(--amber); }

/* ---------- Hero ---------- */
.hero {
  position: relative; overflow: hidden;
  padding: 72px 0 56px;
  background:
    radial-gradient(1100px 500px at 82% -10%, rgba(63, 191, 156, 0.12), transparent 60%),
    radial-gradient(900px 480px at 8% 110%, rgba(232, 163, 61, 0.10), transparent 55%),
    var(--bg);
  border-bottom: 1px solid var(--border);
}
.hero-inner { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 48px; align-items: center; }
.hero-copy { min-width: 0; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 6px 13px; border-radius: 999px; font-size: 13px; font-weight: 600;
  color: var(--teal); border: 1px solid rgba(63, 191, 156, 0.35);
  background: rgba(63, 191, 156, 0.08); margin-bottom: 18px;
}
.hero-badge svg { width: 14px; height: 14px; }
.hero h1 { font-size: 44px; line-height: 1.16; letter-spacing: -0.5px; margin-bottom: 18px; font-weight: 800; }
.hero .lead { font-size: 18px; color: var(--muted); margin-bottom: 26px; max-width: 30em; }
.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 22px; }
.hero-ticks { list-style: none; display: flex; flex-wrap: wrap; gap: 18px; }
.hero-ticks li { display: flex; align-items: center; gap: 7px; color: var(--muted); font-size: 14px; }
.hero-ticks svg { width: 14px; height: 14px; color: var(--teal); }

.hero-plain { padding: 40px 0 30px; }
.hero-plain h1 { font-size: 34px; margin-bottom: 10px; }
.hero-plain .lead { font-size: 16px; margin-bottom: 18px; }
.hero-plain .hero-cta { margin-bottom: 4px; }

/* ---------- 终端窗口(招牌) ---------- */
.hero-art { position: relative; }
.terminal {
  background: #080b12; border: 1px solid var(--border-strong); border-radius: 14px;
  box-shadow: var(--shadow), 0 0 0 1px rgba(0, 0, 0, 0.6), 0 0 60px rgba(63, 191, 156, 0.10);
  overflow: hidden; font-family: var(--mono);
}
.term-bar {
  display: flex; align-items: center; gap: 7px; padding: 11px 14px;
  background: var(--surface2); border-bottom: 1px solid var(--border);
}
.t-dot { width: 11px; height: 11px; border-radius: 50%; }
.t-dot.r { background: var(--red); }
.t-dot.y { background: var(--amber); }
.t-dot.g { background: var(--teal); }
.term-title { margin-left: 10px; font-size: 12px; color: var(--muted); letter-spacing: 0.5px; }
.term-body { padding: 22px 20px 26px; font-size: 14px; line-height: 2; color: #c7d2e3; }
.t-line b { color: var(--teal); font-weight: 600; }
.t-line.ok { color: var(--teal); }
.t-line.dim { color: var(--dim); }
.cursor { display: inline-block; width: 8px; color: var(--amber); animation: blink 1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }
.morse { display: block; margin: 18px 4px 0; color: var(--amber); width: 100%; max-width: 320px; opacity: 0.9; }

/* ---------- 参数一览表 ---------- */
.spec-strip { margin: 44px 0 6px; }
.tbl { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); }
table { width: 100%; border-collapse: collapse; font-size: 15px; }
caption { caption-side: top; text-align: left; padding: 14px 18px 8px; color: var(--muted); font-size: 13px; }
th, td { padding: 13px 18px; text-align: left; border-top: 1px solid var(--border); }
thead th { background: var(--surface2); color: var(--amber); font-weight: 600; white-space: nowrap; }
tbody tr:first-child td { border-top: none; }
tbody th { color: var(--muted); font-weight: 600; white-space: nowrap; }

/* ---------- 硬数据区 ---------- */
.data-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin: 30px auto; }
.data-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 22px 20px; text-align: center;
}
.data-card strong { display: block; font-size: 32px; font-weight: 800; color: var(--amber); font-family: var(--mono); }
.data-card span { color: var(--muted); font-size: 14px; }

/* ---------- 区块头 ---------- */
.sec-head { display: flex; align-items: center; gap: 12px; margin: 52px 0 22px; }
.sec-head svg { color: var(--amber); width: 24px; height: 24px; flex: 0 0 auto; }
.sec-head h2 { font-size: 26px; font-weight: 800; letter-spacing: -0.3px; }
.more { margin-left: auto; font-size: 14px; color: var(--muted); display: inline-flex; align-items: center; gap: 6px; }
.more svg { width: 14px; height: 14px; }
.more:hover { color: var(--amber); }

/* ---------- 优势网格 ---------- */
.feats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.feat {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 24px 22px; transition: border-color .15s ease, transform .15s ease;
}
.feat:hover { border-color: var(--amber); transform: translateY(-3px); }
.feat svg { color: var(--teal); width: 26px; height: 26px; margin-bottom: 14px; }
.feat h3 { font-size: 18px; margin-bottom: 8px; }
.feat p { color: var(--muted); font-size: 14px; }

/* ---------- 场景区 ---------- */
.scenes .grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.col.scene {
  background: linear-gradient(150deg, var(--surface), var(--bg2));
  border: 1px solid var(--border); border-radius: var(--radius); padding: 26px 24px;
}
.col.scene svg { color: var(--amber); width: 22px; height: 22px; margin-bottom: 12px; }
.col.scene h3 { font-size: 18px; margin-bottom: 8px; }
.col.scene p { color: var(--muted); font-size: 14px; }

/* ---------- 卡片网格 ---------- */
.b-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.b-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 22px 20px; color: var(--text); transition: border-color .15s ease, transform .15s ease;
}
.b-card:hover { border-color: var(--teal); transform: translateY(-3px); color: var(--text); }
.b-card svg { color: var(--teal); width: 24px; height: 24px; margin-bottom: 12px; }
.b-card h3 { font-size: 17px; margin-bottom: 8px; }
.b-card span { color: var(--muted); font-size: 13px; display: inline-flex; align-items: center; gap: 5px; }
.b-card span svg { width: 14px; height: 14px; margin: 0; }

/* ---------- 口碑 ---------- */
.grid3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.quote { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px 22px; }
.quote p { font-size: 16px; color: var(--text); margin-bottom: 14px; }
.quote span { color: var(--amber); font-size: 14px; }
.quote em { display: block; color: var(--dim); font-size: 13px; margin-top: 4px; font-style: normal; }

/* ---------- FAQ ---------- */
.faq-list { display: flex; flex-direction: column; gap: 12px; }
details { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; overflow: hidden; }
summary { cursor: pointer; padding: 16px 20px; font-weight: 600; font-size: 16px; list-style: none; position: relative; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; position: absolute; right: 20px; color: var(--amber); font-size: 20px; font-weight: 600; }
details[open] summary::after { content: "−"; }
details p { padding: 0 20px 18px; color: var(--muted); font-size: 15px; }

/* ---------- 下载平台卡 ---------- */
.platform-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.platform-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 24px 20px; color: var(--text); text-align: center;
  transition: border-color .15s ease, transform .15s ease;
}
.platform-card:hover { border-color: var(--amber); transform: translateY(-3px); color: var(--text); }
.platform-card svg { color: var(--teal); width: 26px; height: 26px; margin: 0 auto 12px; }
.platform-card h3 { font-size: 17px; margin-bottom: 6px; }
.platform-card span { color: var(--muted); font-size: 13px; }

/* ---------- 步骤 ---------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.step { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px 20px; }
.step-n {
  display: inline-flex; align-items: center; justify-content: center;
  width: 32px; height: 32px; border-radius: 50%; font-family: var(--mono); font-weight: 700;
  color: #1a1206; background: var(--amber); margin-bottom: 12px;
}
.step p { color: var(--muted); font-size: 14px; }

/* ---------- 提示框 / 列表 ---------- */
.callout {
  display: flex; gap: 12px; align-items: flex-start;
  background: rgba(63, 191, 156, 0.08); border: 1px solid rgba(63, 191, 156, 0.3);
  border-radius: 12px; padding: 16px 18px; margin: 10px 0; color: var(--text);
}
.callout svg { color: var(--teal); width: 18px; height: 18px; flex: 0 0 auto; margin-top: 4px; }
.callout strong { color: var(--teal); }
.callout p { color: var(--muted); font-size: 14px; }

.tick { list-style: none; margin: 8px 0; }
.tick li { position: relative; padding: 6px 0 6px 28px; color: var(--text); }
.tick li::before { content: "✓"; position: absolute; left: 0; color: var(--teal); font-weight: 700; }

/* ---------- 面包屑 ---------- */
.crumb { font-size: 13px; color: var(--dim); margin-bottom: 14px; }
.crumb a { color: var(--muted); }
.crumb a:hover { color: var(--amber); }

/* ---------- 文章页(双栏 grid 挂在 .article-body) ---------- */
.article { padding: 40px 0 60px; }
.article-body { display: grid; grid-template-columns: 1fr 300px; gap: 48px; align-items: start; }
.article-main { min-width: 0; }
.article-main h1 { font-size: 34px; line-height: 1.25; letter-spacing: -0.4px; margin-bottom: 14px; }
.article-meta { font-size: 13px; color: var(--dim); margin-bottom: 22px; }
.hero-img { margin: 0 0 26px; }
.hero-img img { border-radius: var(--radius); border: 1px solid var(--border); }
.hero-img figcaption { font-size: 13px; color: var(--dim); margin-top: 8px; }
.article-main h2 { font-size: 23px; margin: 34px 0 12px; letter-spacing: -0.2px; }
.article-main h3 { font-size: 18px; margin: 24px 0 10px; }
.article-main p { color: #c7d2e3; margin: 0 0 16px; }
.article-main .lead { font-size: 17px; color: var(--muted); border-left: 3px solid var(--amber); padding-left: 16px; margin-bottom: 26px; }
.article-side { position: sticky; top: 86px; }
.article-side h3 { font-size: 16px; margin-bottom: 14px; color: var(--muted); }
.article-side .b-card { margin-bottom: 12px; }

.share { display: flex; gap: 12px; margin-top: 34px; padding-top: 22px; border-top: 1px solid var(--border); }
.share a { display: inline-flex; align-items: center; gap: 7px; font-size: 14px; color: var(--muted); }
.share a svg { width: 15px; height: 15px; }
.share a:hover { color: var(--amber); }

/* ---------- 相关链接 / CTA ---------- */
.rel-links h2 { font-size: 22px; margin-bottom: 18px; }
.cta-band {
  text-align: center; background: linear-gradient(150deg, var(--surface), var(--bg2));
  border: 1px solid var(--border); border-radius: var(--radius); padding: 44px 24px; margin: 48px auto;
}
.cta-band h2 { font-size: 26px; margin-bottom: 10px; }
.cta-band p { color: var(--muted); margin-bottom: 20px; }

/* ---------- 页脚 ---------- */
.footer { background: var(--bg2); border-top: 1px solid var(--border); margin-top: 60px; padding: 48px 0 0; }
.foot-inner { display: grid; grid-template-columns: 1.2fr 1fr 0.8fr; gap: 40px; padding-bottom: 36px; }
.foot-brand { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; }
.foot-brand img { width: 34px; height: 34px; border-radius: 8px; }
.foot-brand span { font-weight: 700; font-size: 18px; }
.foot-brand p { color: var(--muted); font-size: 14px; }
.foot-links ul { list-style: none; columns: 2; gap: 18px; }
.foot-links li { margin-bottom: 10px; }
.foot-links a { color: var(--muted); font-size: 14px; }
.foot-links a:hover { color: var(--amber); }
.foot-signal { color: var(--dim); font-size: 13px; }
.foot-signal .morse { color: var(--amber); margin: 8px 0 12px; opacity: 0.55; }
.foot-copy { border-top: 1px solid var(--border); padding: 18px 0; text-align: center; color: var(--dim); font-size: 13px; }

/* ---------- 返回顶部 ---------- */
.top {
  position: fixed; right: 22px; bottom: 22px; z-index: 40;
  width: 44px; height: 44px; display: flex; align-items: center; justify-content: center;
  background: var(--surface); border: 1px solid var(--border-strong); border-radius: 12px; color: var(--amber);
}
.top svg { width: 16px; height: 16px; }
.top:hover { background: var(--surface2); color: var(--amber); }

/* ---------- 工具页 ---------- */
.page { padding: 32px 0 60px; }
.page h1 { font-size: 32px; margin-bottom: 16px; }
.page .lead { color: var(--muted); }
.err-page { text-align: center; padding: 80px 0; }
.err-page h1 { font-size: 72px; font-family: var(--mono); color: var(--amber); }
.err-page p { color: var(--muted); margin-bottom: 24px; }

.search-box { display: flex; gap: 10px; max-width: 520px; margin: 20px 0; }
.search-box input {
  flex: 1; padding: 12px 16px; border-radius: 10px; border: 1px solid var(--border-strong);
  background: var(--surface); color: var(--text); font-size: 15px;
}
.search-box input:focus { outline: none; border-color: var(--amber); }

.sitemap-list { list-style: none; }
.sitemap-list li { border-bottom: 1px solid var(--border); }
.sitemap-list a { display: block; padding: 11px 4px; color: var(--muted); }
.sitemap-list a:hover { color: var(--amber); }

/* ---------- 响应式 ---------- */
@media (max-width: 960px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-art { order: -1; }
  .feats, .b-grid, .grid3, .platform-grid, .steps { grid-template-columns: repeat(2, 1fr); }
  .data-row { grid-template-columns: repeat(2, 1fr); }
  .article-body { grid-template-columns: 1fr; }
  .article-side { position: static; }
  .foot-inner { grid-template-columns: 1fr; gap: 28px; }
}
@media (max-width: 600px) {
  .nav-links { display: none; }
  .hero h1 { font-size: 32px; }
  .feats, .b-grid, .grid3, .platform-grid, .steps, .data-row, .grid2 { grid-template-columns: 1fr; }
  .wrap { padding: 0 16px; }
}