:root{--navy:#0e2a47;--navy-2:#13314e;--ink:#1a2430;--muted:#5d6b7a;--line:#e7ecf2;--bg:#fff;--bg-soft:#f4f7fa;--accent:#0e7490;--accent-soft:rgba(14,116,144,.08);--radius:14px;--maxw:1080px}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--bg);line-height:1.72;font-size:16px;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}

header.nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--navy);font-size:17px}
.brand .logo{width:32px;height:32px;border-radius:8px;background:var(--navy);color:#fff;display:grid;place-items:center;font-size:15px;font-weight:900}
.nav-links{display:flex;gap:26px;align-items:center}
.nav-links a{font-weight:500;color:var(--ink)}
.nav-links a:hover{color:var(--accent)}
.hamburger{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px}
.hamburger span{width:22px;height:2px;background:var(--navy);border-radius:2px}

/* 下拉导航（与官网首页一致） */
.nav-links .dropdown{position:relative}
.nav-links .drop-label{font-size:15px;font-weight:500;color:var(--ink);cursor:pointer;white-space:nowrap;background:transparent;border:0;font-family:inherit;padding:0;text-align:left}
.nav-links .drop-label::after{content:"";display:inline-block;width:0;height:0;margin-left:6px;vertical-align:middle;border-left:4px solid transparent;border-right:4px solid transparent;border-top:5px solid var(--muted);transition:transform .2s}
.nav-links .dropdown.open .drop-label::after{transform:rotate(180deg)}
.nav-links .dropdown-menu{position:absolute;top:calc(100% + 10px);left:50%;transform:translateX(-50%);background:#fff;border:1px solid var(--line);border-radius:10px;box-shadow:0 8px 30px rgba(14,42,71,.12);min-width:180px;padding:8px 0;display:none;flex-direction:column;z-index:100}
.nav-links:not(.open) .dropdown:hover .dropdown-menu,.nav-links:not(.open) .dropdown:focus-within .dropdown-menu{display:flex}
.nav-links .dropdown-menu a{padding:10px 20px;font-size:14.5px;white-space:nowrap;border-bottom:0}
.nav-links .dropdown-menu a:hover{background:var(--bg-soft);color:var(--accent)}
.nav-links .dropdown-menu a.active{color:var(--accent);font-weight:700}
.nav-links .dropdown-menu::before{content:"";position:absolute;top:-6px;left:50%;transform:translateX(-50%) rotate(45deg);width:10px;height:10px;background:#fff;border-left:1px solid var(--line);border-top:1px solid var(--line)}

main{padding:64px 0 72px}
.tagline{font-size:13px;font-weight:600;color:var(--accent);letter-spacing:.5px}
.section-head h1{font-size:32px;font-weight:800;color:var(--navy);margin-top:8px}
.section-head p{color:var(--muted);margin-top:10px}
.post{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px 26px;margin-top:20px;transition:.2s}
.post:hover{box-shadow:0 8px 24px rgba(14,42,71,.06);border-color:var(--accent)}
.post .meta{display:flex;gap:14px;align-items:center;color:var(--muted);font-size:13px;margin-bottom:8px;flex-wrap:wrap}
.post .meta .src{background:var(--accent-soft);color:var(--accent);padding:2px 10px;border-radius:999px;font-weight:600}
.post h3{font-size:20px;color:var(--navy);font-weight:800;line-height:1.4}
.post h3 a:hover{color:var(--accent)}
.post p{color:var(--muted);margin-top:10px;font-size:15px}
.post .more{display:inline-block;margin-top:14px;color:var(--accent);font-weight:700;font-size:14px}
.empty{color:var(--muted);margin-top:30px}

/* 详情页 */
.article{max-width:760px;margin:0 auto;padding:48px 24px 72px}
.article .meta{display:flex;gap:14px;align-items:center;color:var(--muted);font-size:14px;margin-bottom:14px;flex-wrap:wrap}
.article .meta .src{background:var(--accent-soft);color:var(--accent);padding:3px 12px;border-radius:999px;font-weight:600}
.article h1{font-size:30px;font-weight:800;color:var(--navy);line-height:1.35}
.article .lead{color:var(--muted);margin-top:18px;font-size:17px}
.article .body{margin-top:26px;color:var(--ink);font-size:16.5px}
.article .body p{margin:14px 0}
.article .data-source{margin-top:34px;padding:16px 18px;background:var(--bg-soft);border-left:4px solid var(--accent);border-radius:0 10px 10px 0;font-size:14px;color:var(--muted)}
.article .data-source strong{color:var(--navy)}
.article .data-source a{color:var(--accent);word-break:break-all}
.article .orig{margin-top:18px;display:inline-flex;align-items:center;gap:8px;background:var(--navy);color:#fff;padding:11px 22px;border-radius:10px;font-weight:600}
.article .orig:hover{background:var(--navy-2)}
.article .back{display:inline-block;margin-top:26px;color:var(--accent);font-weight:600}

footer{background:var(--navy);color:#c7d6e6;padding:44px 0 26px;text-align:center}
footer .fbrand{color:#fff;font-weight:800;font-size:17px;display:flex;align-items:center;gap:10px;justify-content:center}
footer .fbrand .logo{width:28px;height:28px;border-radius:8px;background:#fff;color:var(--navy);display:grid;place-items:center;font-size:13px;font-weight:900}
footer .fnav{margin:18px 0;display:flex;gap:24px;justify-content:center;flex-wrap:wrap}
footer .fnav a,footer .flinks a{color:#9fb4ca}
footer .fnav a:hover,footer .flinks a:hover{color:var(--accent)}
footer .fcontact{color:#9fb4ca;font-size:14px;margin-bottom:14px}
footer .flinks{font-size:14px;color:#9fb4ca;margin-bottom:14px}
footer .flinks .flbl{color:#8fa8c0;margin-right:6px}
footer .foot-bottom{border-top:1px solid rgba(255,255,255,.12);padding-top:18px;color:#8fa8c0;font-size:13px;line-height:1.9}
footer .icp a{color:#8fa8c0}
footer .icp a:hover{color:var(--accent)}

@media(max-width:680px){
  .nav-links{display:none}
  .hamburger{display:flex}
  .nav-links.open{display:flex;position:absolute;top:64px;left:0;right:0;background:#fff;flex-direction:column;align-items:flex-start;gap:0;padding:8px 24px 18px;border-bottom:1px solid var(--line);box-shadow:0 8px 24px rgba(14,42,71,.08)}
  .nav-links.open a{padding:12px 0;border-bottom:1px solid var(--line);width:100%}
  /* 移动菜单内下拉改为手风琴折叠，与首页一致 */
  .nav-links.open .dropdown{width:100%}
  .nav-links.open .drop-label{display:block;padding:12px 0;border-bottom:1px solid var(--line);width:100%;text-align:left;cursor:pointer}
  .nav-links.open .dropdown-menu{display:none;position:static;left:auto;transform:none;box-shadow:none;border:0;padding:0;background:transparent;gap:0}
  .nav-links.open .dropdown-menu::before{display:none}
  .nav-links.open .dropdown.open .dropdown-menu{display:flex}
  .nav-links.open .dropdown-menu a{padding-left:14px;font-size:14.5px;color:var(--muted);border-color:var(--line)}
  .nav-links.open .dropdown-menu a:hover{background:transparent;color:var(--accent)}
  main{padding:44px 0 56px}
  .section-head h1{font-size:26px}
  .post{padding:20px}
  .post h3{font-size:18px}
  .article{padding:32px 20px 56px}
  .article h1{font-size:24px}
  .article .lead{font-size:15.5px}
  .article .body{font-size:15.5px}
  footer .fcontact{font-size:13px;line-height:1.8}
  footer .fnav{gap:16px}
  footer .foot-bottom{font-size:12.5px}
}