/* 三角洲行动辅助 · 特战终端风 */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
:root{
    --bg:#0a0e12;
    --bg2:#121820;
    --bg3:#1a2230;
    --gold:#c9a227;
    --gold2:#e8c547;
    --steel:#5b8def;
    --sand:#c8c4bc;
    --dim:#7a8494;
    --line:rgba(201,162,39,.22);
    --font:"PingFang SC","Microsoft YaHei",sans-serif;
}
html{scroll-behavior:smooth;scroll-padding-top:88px}
body{
    font-family:var(--font);background:var(--bg);color:var(--sand);
    line-height:1.75;font-size:15px;
    background-image:
        linear-gradient(rgba(91,141,239,.03) 1px,transparent 1px),
        linear-gradient(90deg,rgba(91,141,239,.03) 1px,transparent 1px);
    background-size:32px 32px;
}
img{max-width:100%;display:block}
a{color:var(--steel);text-decoration:none;transition:.2s}
a:hover{color:var(--gold2)}
.inner{max-width:1160px;margin:0 auto;padding:0 24px}

.status-line{
    display:flex;flex-wrap:wrap;justify-content:center;gap:8px 24px;
    padding:6px 16px;font-size:11px;font-weight:700;letter-spacing:.08em;
    background:var(--bg3);color:var(--dim);border-bottom:1px solid var(--line);
}
.status-line span:nth-child(2){color:var(--gold)}

.masthead{
    position:sticky;top:0;z-index:200;
    background:rgba(10,14,18,.94);backdrop-filter:blur(10px);
    border-bottom:2px solid var(--gold);
}
.masthead .inner{
    display:flex;align-items:center;gap:16px;height:64px;
}
.logo{display:flex;align-items:center;gap:10px;color:#fff;font-weight:800;flex-shrink:0}
.logo-badge{
    width:38px;height:38px;display:flex;align-items:center;justify-content:center;
    background:var(--gold);color:var(--bg);font-size:20px;font-weight:900;
    clip-path:polygon(50% 0%,100% 25%,100% 75%,50% 100%,0% 75%,0% 25%);
}
.logo-text{font-size:15px;max-width:130px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.nav-main{display:flex;flex-wrap:wrap;gap:2px;flex:1;justify-content:center}
.nav-main a{
    padding:8px 14px;font-size:13px;font-weight:600;color:var(--dim);
    border-bottom:2px solid transparent;margin-bottom:-2px;
    min-width:4em;text-align:center;
}
.nav-main a:hover{color:var(--gold);border-bottom-color:var(--gold)}
.btn-dl{
    flex-shrink:0;padding:10px 22px;background:var(--gold);color:var(--bg);
    font-weight:800;font-size:13px;clip-path:polygon(8px 0,100% 0,calc(100% - 8px) 100%,0 100%);
}
.btn-dl:hover{background:var(--gold2);color:var(--bg)}

.hero{padding:48px 0 32px;background:linear-gradient(180deg,var(--bg2),var(--bg))}
.hero-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center;margin-bottom:36px}
.tag{display:inline-block;font-size:11px;font-weight:800;letter-spacing:.2em;color:var(--steel);margin-bottom:14px}
.hero-text h1{font-size:clamp(26px,3.5vw,42px);font-weight:900;color:#fff;line-height:1.22;margin-bottom:14px}
.lead{font-size:15px;color:var(--dim);margin-bottom:20px}
.hero-meta{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:24px}
.hero-meta span{
    padding:4px 12px;font-size:11px;font-weight:700;
    border:1px solid var(--line);color:var(--gold);
}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px}
.btn{display:inline-block;padding:12px 26px;font-weight:800;font-size:14px}
.btn-fill{background:var(--gold);color:var(--bg)}
.btn-fill:hover{background:var(--gold2);color:var(--bg)}
.btn-line{border:2px solid var(--steel);color:var(--steel);padding:10px 24px}
.btn-line:hover{background:var(--steel);color:#fff}
.hero-media{position:relative;border:1px solid var(--line)}
.hero-media img{width:100%;aspect-ratio:580/420;object-fit:cover}
.hero-stamp{
    position:absolute;top:12px;right:12px;padding:5px 12px;
    background:rgba(10,14,18,.85);color:var(--gold);font-size:10px;font-weight:800;letter-spacing:.15em;
}
.stat-bar{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line)}
.stat{text-align:center;padding:18px 12px;background:var(--bg3)}
.stat b{display:block;font-size:24px;font-weight:900;color:var(--gold);margin-bottom:2px}
.stat span{font-size:11px;color:var(--dim)}

.section{padding:64px 0}
.section-alt{background:var(--bg2);border-top:1px solid rgba(255,255,255,.04);border-bottom:1px solid rgba(255,255,255,.04)}
.sec-hd{margin-bottom:36px;padding-bottom:16px;border-bottom:1px solid var(--line)}
.sec-hd h2{font-size:26px;font-weight:900;color:#fff;margin-bottom:6px}
.sec-hd h2::before{content:"▸ ";color:var(--gold)}
.sec-hd p{font-size:14px;color:var(--dim)}

.feat-list{display:flex;flex-direction:column;gap:2px}
.feat-row{
    display:flex;gap:20px;align-items:flex-start;padding:22px 24px;
    background:var(--bg3);border-left:3px solid transparent;transition:.2s;
}
.feat-row:hover{border-left-color:var(--gold);background:var(--bg2)}
.feat-num{
    font-size:28px;font-weight:900;color:var(--gold);opacity:.5;line-height:1;min-width:40px;
}
.feat-body h3{font-size:17px;color:#fff;margin-bottom:6px}
.feat-body p{font-size:13px;color:var(--dim)}

.plan-deck{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.plan-card{
    background:var(--bg3);padding:28px 24px;border:1px solid var(--line);
    clip-path:polygon(0 0,calc(100% - 16px) 0,100% 16px,100% 100%,0 100%);
    position:relative;
}
.plan-featured{border-color:var(--gold);box-shadow:0 0 24px rgba(201,162,39,.12)}
.plan-flag{
    position:absolute;top:0;right:0;padding:4px 14px;background:var(--gold);
    color:var(--bg);font-size:11px;font-weight:800;
}
.plan-tier{font-size:20px;font-weight:900;color:#fff;margin-bottom:16px}
.plan-card ul{list-style:none;margin-bottom:22px}
.plan-card li{
    padding:8px 0;font-size:13px;color:var(--dim);border-bottom:1px dashed rgba(255,255,255,.06);
    padding-left:16px;position:relative;
}
.plan-card li::before{content:"◆";position:absolute;left:0;color:var(--gold);font-size:8px;top:12px}
.plan-card .btn{display:block;text-align:center;width:100%}

.faq-wrap{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.faq-block{background:var(--bg3);padding:20px 22px;border-top:2px solid var(--steel)}
.faq-block.faq-wide{grid-column:span 2}
.faq-block time{display:block;font-size:11px;color:var(--gold);font-weight:700;margin-bottom:6px}
.faq-block h3{font-size:15px;color:#fff;margin-bottom:8px}
.faq-block p{font-size:13px;color:var(--dim)}

.guide-ladder{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.guide-rung{
    background:var(--bg3);padding:24px;border:1px solid var(--line);
    border-top:3px solid var(--gold);
}
.rung-label{font-size:11px;font-weight:900;color:var(--steel);letter-spacing:.12em;margin-bottom:10px}
.guide-rung h3{font-size:16px;color:#fff;margin-bottom:8px}
.guide-rung p{font-size:13px;color:var(--dim)}

.related-links-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
.related-link-card{
    display:block;background:var(--bg3);border:1px solid rgba(255,255,255,.08);
    border-radius:4px;padding:14px 16px;transition:.2s;
}
.related-link-card:hover{border-color:var(--gold);background:rgba(201,162,39,.06)}
.related-link-desc{font-size:13px;color:var(--dim);line-height:1.5;word-break:break-all;
    display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.related-link-card:hover .related-link-desc{color:var(--sand)}

.footer{padding:48px 0 36px;border-top:2px solid var(--gold);background:var(--bg2)}
.footer-cta{text-align:center;margin-bottom:24px}
.footer-cta strong{display:block;font-size:20px;color:#fff;margin-bottom:6px}
.footer-cta span{display:block;font-size:13px;color:var(--dim);margin-bottom:14px}
.footer-nav{display:flex;justify-content:center;gap:24px;margin-bottom:14px}
.footer-nav a{font-size:13px;color:var(--dim)}
.footer-copy{text-align:center;font-size:12px;color:var(--dim);line-height:2}

.section,.hero{scroll-margin-top:88px}

@media(max-width:960px){
    .hero-grid,.plan-deck,.guide-ladder{grid-template-columns:1fr}
    .stat-bar{grid-template-columns:repeat(2,1fr)}
    .faq-block.faq-wide{grid-column:span 1}
}
@media(max-width:640px){
    .masthead .inner{flex-wrap:wrap;height:auto;padding:12px 0}
    .nav-main{order:3;width:100%;justify-content:flex-start;overflow-x:auto}
    .faq-wrap{grid-template-columns:1fr}
}
.card{}

/* ===== 404 错误页 ===== */
.err-page{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:48px 20px}
.err-page .err-code{font-size:clamp(64px,12vw,96px);font-weight:900;line-height:1;margin-bottom:12px;color:var(--gold)}
.err-page h1{font-size:clamp(20px,3vw,28px);font-weight:700;margin-bottom:10px;color:var(--sand)}
.err-page .err-desc{color:var(--dim);max-width:480px;margin:0 auto 24px;font-size:14px;line-height:1.7}
.err-page .btn-home{display:inline-flex;padding:12px 28px;font-weight:700;text-decoration:none;border-radius:8px;background:var(--gold);color:var(--bg);transition:.2s}
.err-page .btn-home:hover{background:var(--gold2);color:var(--bg)}

/* ===== 友情链接 ===== */
.flink-section {
    padding: 2.5rem 1rem;
    border-top: 1px solid rgba(128, 128, 128, 0.2);
}
.flink-section .container,
.flink-section .inner,
.flink-section .wrap {
    max-width: 1200px;
    margin: 0 auto;
}
.flink-section h2 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 1rem;
}
.flinks-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.5rem 0.75rem;
}
.flink-item {
    font-size: 0.8125rem;
    text-decoration: none;
    opacity: 0.85;
    display: block;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    transition: opacity 0.2s ease;
}
.flink-item:hover {
    opacity: 1;
}
@media (max-width: 640px) {
    .flinks-grid {
        grid-template-columns: 1fr;
    }
}

/* ===== 全局组件（悬浮条 / 回顶 / 友链等）===== */
.float-dl-banner {
  position: fixed;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%) translateY(120%);
  z-index: 9000;
  width: min(420px, calc(100% - 32px));
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 12px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
  opacity: 0;
  pointer-events: none;
  transition: transform 0.35s ease, opacity 0.35s ease;
}
.float-dl-banner.is-show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
  pointer-events: auto;
}
.float-dl-close {
  position: absolute;
  top: 6px;
  right: 10px;
  border: none;
  background: none;
  color: rgba(255, 255, 255, 0.55);
  font-size: 20px;
  line-height: 1;
  cursor: pointer;
  padding: 4px;
}
.float-dl-close:hover {
  color: #fff;
}
.float-dl-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 40px 14px 16px;
  color: #fff;
  text-decoration: none;
}
.float-dl-icon {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}
.float-dl-text strong {
  display: block;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 2px;
}
.float-dl-text small {
  display: block;
  font-size: 11px;
  color: rgba(255, 255, 255, 0.65);
}
.back-to-top {
  position: fixed;
  right: 20px;
  bottom: 24px;
  z-index: 9100;
  width: 44px;
  height: 44px;
  border: none;
  border-radius: 50%;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: #fff;
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  box-shadow: 0 4px 16px rgba(102, 126, 234, 0.45);
  transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.2s ease;
}
.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
}
.back-to-top:hover {
  transform: translateY(-3px);
}
@media (max-width: 640px) {
  .float-dl-banner {
    width: calc(100% - 24px);
    bottom: 12px;
  }
  .back-to-top {
    right: 14px;
    bottom: 18px;
    width: 40px;
    height: 40px;
  }
}