* { margin: 0; padding: 0; box-sizing: border-box; }
:root {
  --bg: #0e1117;
  --bg2: #151a23;
  --card: #1b2129;
  --line: #283040;
  --txt: #e6edf3;
  --txt2: #a4b0be;
  --txt3: #6b7785;
  --accent: #4f8ef7;
  --accent2: #38d39f;
  --warn: #ffab40;
}
body {
  background: var(--bg);
  color: var(--txt);
  font: 15px/1.75 -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--txt2); text-decoration: none; transition: .16s; }
a:hover { color: var(--accent); }

/* top bar */
.top { background: rgba(14,17,23,.94); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 50; backdrop-filter: blur(8px); }
.inner { max-width: 1180px; margin: 0 auto; padding: 0 22px; }
.top .inner { display: flex; align-items: center; gap: 34px; height: 62px; }
.brand { font-size: 18px; font-weight: 700; color: var(--txt); letter-spacing: .5px; display: flex; align-items: center; gap: 8px; }
.brand-icon { display: inline-grid; place-items: center; width: 26px; height: 26px; border-radius: 7px; background: linear-gradient(135deg, var(--accent), var(--accent2)); color: #fff; font-size: 12px; }
.menu { display: flex; gap: 26px; flex: 1; min-width: 0; }
.menu a { font-size: 14.5px; position: relative; padding: 4px 0; white-space: nowrap; }
.menu a.on { color: var(--txt); }
.menu a.on::after { content: ""; position: absolute; left: 0; right: 0; bottom: -2px; height: 2px; background: var(--accent); border-radius: 2px; }
.cta { background: var(--accent); color: #fff !important; padding: 7px 16px; border-radius: 7px; font-size: 13.5px; font-weight: 600; }
.cta:hover { background: #3d7ce0; }

.main { max-width: 1180px; margin: 0 auto; padding: 0 22px 60px; }

/* hero */
.hero { padding: 54px 0 40px; border-bottom: 1px solid var(--line); }
.hero h1 { font-size: 34px; font-weight: 700; letter-spacing: -.5px; line-height: 1.3; margin-bottom: 14px; }
.hero h1 em { font-style: normal; background: linear-gradient(135deg,var(--accent),var(--accent2)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p { color: var(--txt2); font-size: 16px; max-width: 680px; }
.hero-stats { display: flex; gap: 40px; margin-top: 26px; }
.hero-stats b { font-size: 25px; color: var(--accent2); font-weight: 700; }
.hero-stats span { display: block; font-size: 12.5px; color: var(--txt3); }

/* blocks */
.block { padding: 42px 0 8px; }
.block-hd { display: flex; align-items: center; margin-bottom: 20px; gap: 12px; }
.block-hd h2 { font-size: 19px; font-weight: 700; }
.block-hd .line { flex: 1; height: 1px; background: var(--line); }
.block-hd a { font-size: 13px; color: var(--txt3); }

/* software tiles */
.sw-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 12px; }
.sw {
  background: var(--card); border: 1px solid var(--line); border-radius: 10px;
  padding: 18px; transition: .18s;
}
.sw:hover { border-color: var(--accent); transform: translateY(-2px); }
.sw h3 { font-size: 16px; color: var(--txt); margin-bottom: 6px; font-weight: 600; }
.sw p { font-size: 13px; color: var(--txt3); line-height: 1.6; }

/* cards */
.cards { display: grid; grid-template-columns: repeat(3,1fr); gap: 14px; }
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: 10px;
  padding: 18px; display: flex; flex-direction: column; gap: 9px; transition: .18s;
}
.card:hover { border-color: #3a4a63; background: #1e252f; }
.card h3 { font-size: 15.5px; color: var(--txt); font-weight: 600; line-height: 1.5; }
.card .tags { display: flex; gap: 7px; flex-wrap: wrap; }
.chip { font-size: 11.5px; padding: 2px 8px; border-radius: 4px; background: rgba(79,142,247,.13); color: #7aa9f5; }
.chip.g { background: rgba(56,211,159,.12); color: var(--accent2); }

/* list rows */
.rows { display: grid; gap: 10px; }
.row {
  background: var(--card); border: 1px solid var(--line); border-radius: 9px;
  padding: 15px 18px; display: flex; align-items: center; gap: 14px;
}
.row:hover { border-color: #3a4a63; }
.row h3 { font-size: 15px; color: var(--txt); font-weight: 500; flex: 1; }
.row .meta { font-size: 12.5px; color: var(--txt3); white-space: nowrap; }

/* article */
.crumbs { font-size: 13px; color: var(--txt3); padding: 20px 0 0; }
.crumbs a { color: var(--txt3); }
.crumbs span { margin: 0 7px; opacity: .5; }

.art { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 34px 38px; margin: 20px 0; }
.art h1 { font-size: 27px; font-weight: 700; line-height: 1.4; margin-bottom: 14px; }
.art .metabar { display: flex; gap: 10px; flex-wrap: wrap; padding-bottom: 20px; border-bottom: 1px solid var(--line); margin-bottom: 26px; }
.art h2 { font-size: 18px; font-weight: 700; margin: 30px 0 14px; padding-left: 12px; border-left: 3px solid var(--accent); }
.art p { color: var(--txt2); margin-bottom: 13px; font-size: 15px; }
.art .lead { font-size: 15.5px; color: var(--txt2); background: var(--bg2); border-radius: 8px; padding: 16px 18px; border-left: 3px solid var(--accent2); }

/* steps */
.steps { counter-reset: st; display: grid; gap: 14px; }
.step { background: var(--bg2); border: 1px solid var(--line); border-radius: 9px; padding: 16px 18px 16px 54px; position: relative; }
.step::before {
  counter-increment: st; content: counter(st);
  position: absolute; left: 16px; top: 16px;
  width: 25px; height: 25px; border-radius: 50%;
  background: var(--accent); color: #fff; font-size: 13px; font-weight: 700;
  display: grid; place-items: center;
}
.step h4 { font-size: 15px; color: var(--txt); margin-bottom: 7px; font-weight: 600; }
.step p { font-size: 14.5px; color: var(--txt2); margin: 0; }
.step .tip { margin-top: 9px; font-size: 13px; color: var(--warn); background: rgba(255,171,64,.09); padding: 8px 11px; border-radius: 6px; }

/* faq */
.faq { display: grid; gap: 9px; }
.faq details { background: var(--bg2); border: 1px solid var(--line); border-radius: 8px; padding: 13px 16px; }
.faq summary { cursor: pointer; font-size: 15px; color: var(--txt); font-weight: 500; }
.faq p { margin: 10px 0 0; font-size: 14.5px; }

/* pager */
.pager { display: flex; justify-content: center; gap: 12px; align-items: center; padding: 34px 0 0; font-size: 14px; }
.pager a { border: 1px solid var(--line); background: var(--card); padding: 7px 18px; border-radius: 7px; }

/* search */
.sbox { display: flex; gap: 9px; max-width: 560px; margin: 26px 0; }
.sbox input { flex: 1; background: var(--card); border: 1px solid var(--line); color: var(--txt); padding: 10px 14px; border-radius: 8px; font-size: 14.5px; outline: 0; }
.sbox input:focus { border-color: var(--accent); }
.sbox button { background: var(--accent); border: 0; color: #fff; padding: 0 20px; border-radius: 8px; cursor: pointer; font-size: 14.5px; font-weight: 600; }

.empty { text-align: center; padding: 70px 0; color: var(--txt3); }

/* footer */
.foot { border-top: 1px solid var(--line); background: var(--bg2); padding: 40px 0 26px; }
.foot-cols { display: grid; grid-template-columns: repeat(3,1fr); gap: 30px; margin-bottom: 28px; }
.foot h4 { font-size: 13.5px; color: var(--txt); margin-bottom: 12px; font-weight: 600; }
.foot a { display: block; font-size: 13px; color: var(--txt3); margin-bottom: 8px; }
.foot-btm { border-top: 1px solid var(--line); padding-top: 18px; }
.foot-btm p { font-size: 12.5px; color: var(--txt3); line-height: 1.9; }

@media (max-width: 880px) {
  .cards, .sw-grid { grid-template-columns: repeat(2,1fr); }
  .hero h1 { font-size: 25px; }
}
@media (max-width: 620px) {
  .top .inner { gap: 12px; height: auto; padding: 12px 16px; flex-wrap: wrap; }
  /* 关键修复：flex:1 的默认 flex-basis 是 0%，窄屏会把导航压成一个字一行；
     改成 flex: 1 0 100% 让导航独占一行、横向滚动 */
  .menu {
    flex: 1 0 100%;
    order: 3;
    width: 100%;
    gap: 20px;
    font-size: 14px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    white-space: nowrap;
    padding-bottom: 2px;
  }
  .menu a { flex: 0 0 auto; }
  .brand { font-size: 16px; }
  .main { padding: 0 16px 40px; }
  .hero { padding: 34px 0 26px; }
  .hero h1 { font-size: 22px; line-height: 1.4; }
  .hero p { font-size: 14.5px; }
  .hero-stats { gap: 22px; flex-wrap: wrap; }
  .hero-stats b { font-size: 21px; }
  .cards, .sw-grid, .foot-cols { grid-template-columns: 1fr; }
  .art { padding: 22px 16px; }
  .art h1 { font-size: 20px; }
  .art h2 { font-size: 16.5px; }
  .art p { font-size: 14.5px; }
  .step { padding: 14px 14px 14px 48px; }
  .cta { display: none; }
  .row { flex-wrap: wrap; gap: 6px; }
  .row h3 { flex: 1 0 100%; }
}

@media (max-width: 400px) {
  .menu { gap: 16px; font-size: 13.5px; }
  .hero h1 { font-size: 20px; }
}

/* 公告条 */
.notice {
  display: flex; align-items: center; gap: 10px;
  margin-bottom: 14px; padding: 9px 14px;
  background: rgba(79,142,247,.09); border: 1px solid rgba(79,142,247,.28);
  border-radius: 8px; font-size: 14px; color: var(--txt2);
}
.notice-tag {
  flex: 0 0 auto; font-size: 11.5px; padding: 2px 8px;
  background: var(--accent); color: #fff; border-radius: 4px; font-weight: 600;
}
.notice-txt { flex: 1; line-height: 1.6; }
.notice-txt a { color: var(--accent2); text-decoration: underline; }
.hdr-user { font-size: 13.5px; color: var(--txt2); white-space: nowrap; }
.hdr-user:hover { color: var(--accent); }