:root{
  --lake:#0B6E8A;
  --lake-deep:#0A566C;
  --lake-soft:#D9F1F7;
  --orange:#F28A2E;
  --gold:#C9932E;
  --paper:#FFF9F0;
  --ink:#17262E;
  --teal:#2E9E7E;
  --coral:#D9553F;
  --mist:#4E6874;
  --sun:#FFD166;
  --font-display:"Noto Sans SC","Alibaba PuHuiTi","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-body:var(--font-display);
  --font-mono:"JetBrains Mono","SFMono-Regular",ui-monospace,Consolas,"Courier New",monospace;
  --maxw:1200px;
  --gutter:clamp(18px,4vw,48px);
  --r-sm:10px;
  --r-md:18px;
  --r-lg:24px;
  --line:rgba(23,38,46,.14);
  --dur:220ms;
  --ease:cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background-color:var(--paper);
  background-image:radial-gradient(circle at 8% 4%,rgba(217,241,247,.75),transparent 42%),radial-gradient(circle at 96% 0%,rgba(255,209,102,.32),transparent 38%);
  background-repeat:no-repeat;
  color:var(--ink);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.7;
  letter-spacing:.01em;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
img,svg{display:block;max-width:100%;height:auto}
a{color:var(--lake);text-decoration-thickness:1.5px;text-underline-offset:3px}
a:hover{color:var(--lake-deep)}
strong{font-weight:800}
::selection{background:var(--sun);color:var(--ink)}
:focus-visible{outline:3px solid var(--orange);outline-offset:3px;border-radius:4px}

/* ---------- 刊头 ---------- */
.site-header{position:relative;z-index:40;background:linear-gradient(180deg,#FFFFFF 0%,var(--paper) 68%,#FDF3E4 100%);border-bottom:1px solid rgba(201,147,46,.55)}
.site-header::after{content:"";position:absolute;left:0;right:0;bottom:-5px;height:4px;background:repeating-linear-gradient(90deg,var(--gold) 0 9px,transparent 9px 18px);opacity:.5;pointer-events:none}
.scroll-progress{position:fixed;top:0;left:0;right:0;height:3px;z-index:90;pointer-events:none;background:linear-gradient(90deg,var(--orange),var(--gold));transform:scaleX(0);transform-origin:0 50%}
.skip-link{position:absolute;left:50%;top:-120px;transform:translateX(-50%);z-index:200;padding:12px 22px;border-radius:0 0 var(--r-md) var(--r-md);background:var(--ink);color:var(--paper);font-weight:700;font-size:14px;text-decoration:none;transition:top var(--dur) var(--ease)}
.skip-link:focus{top:0;color:var(--sun)}
.masthead{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 var(--gutter)}
.masthead__bar{display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:clamp(12px,2vw,28px);padding:16px 0 8px}
.brand{display:inline-flex;align-items:center;gap:12px;text-decoration:none;color:var(--ink)}
.brand:hover{color:var(--ink)}
.brand__mark{display:grid;place-items:center;width:46px;height:46px;flex:0 0 auto;border-radius:14px;background:var(--lake);color:var(--paper);font-size:23px;font-weight:900;line-height:1;box-shadow:inset 0 0 0 2px rgba(201,147,46,.85),0 6px 14px -10px rgba(11,110,138,.9);transform:rotate(-3deg)}
.brand__text{display:block;min-width:0}
.brand__name{display:block;font-size:clamp(20px,2.2vw,26px);font-weight:900;line-height:1.1;letter-spacing:.05em}
.brand__tagline{display:block;margin-top:3px;font-size:12px;font-weight:700;letter-spacing:.16em;color:var(--mist)}
.masthead__note{justify-self:center;margin:0;font-size:13px;font-weight:600;letter-spacing:.14em;color:var(--mist);white-space:nowrap}
.masthead__num{font-family:var(--font-mono);font-size:16px;font-weight:700;color:var(--orange);letter-spacing:0}
.nav-toggle{display:none;align-items:center;gap:10px;padding:10px 14px;border:1.5px solid var(--lake);border-radius:999px;background:#fff;color:var(--lake);font-family:inherit;font-size:13.5px;font-weight:800;letter-spacing:.06em;cursor:pointer;transition:background var(--dur) var(--ease),color var(--dur) var(--ease)}
.nav-toggle::-moz-focus-inner{border:0}
.nav-toggle:hover{background:var(--lake-soft)}
.nav-toggle__bars{display:grid;gap:5px;width:20px}
.nav-toggle__bar{display:block;width:20px;height:2px;border-radius:2px;background:currentColor;transition:transform var(--dur) var(--ease)}
.nav-toggle[aria-expanded="true"]{background:var(--lake);color:#fff;border-color:var(--lake)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:first-child{transform:translateY(3.5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:last-child{transform:translateY(-3.5px) rotate(-45deg)}
.nav-toggle__label{white-space:nowrap}
.site-nav{display:flex;justify-content:center;padding:8px 0 14px}
.site-nav__list{display:flex;flex-wrap:wrap;justify-content:center;gap:4px;padding:6px;border-radius:999px;background:var(--lake-soft);box-shadow:inset 0 0 0 1px rgba(11,110,138,.18)}
.site-nav__item{display:block}
.site-nav__link{display:block;padding:8px 16px;border-radius:999px;color:var(--ink);font-size:15px;font-weight:700;text-decoration:none;white-space:nowrap;transition:background var(--dur) var(--ease),color var(--dur) var(--ease),box-shadow var(--dur) var(--ease)}
.site-nav__link:hover{background:#fff;color:var(--lake)}
.site-nav__link[aria-current="page"]{background:var(--lake);color:#fff;box-shadow:0 3px 0 0 rgba(201,147,46,.9)}
.site-nav__link[aria-current="page"]:hover{background:var(--lake-deep);color:#fff}
.utility-bar{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:10px 0 12px;border-top:1px dashed rgba(201,147,46,.6)}
.utility-bar__list{display:flex;flex-wrap:wrap;gap:8px}
.utility-bar__item{display:block}
.utility-bar__link{display:block;padding:5px 12px;border:1px solid rgba(11,110,138,.28);border-radius:999px;background:#fff;color:var(--lake);font-size:13.5px;font-weight:700;text-decoration:none;transition:background var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease)}
.utility-bar__link:hover{background:var(--sun);border-color:var(--gold);color:var(--ink)}
.utility-bar__hint{margin:0;font-size:12.5px;font-weight:600;letter-spacing:.06em;color:var(--mist)}

/* ---------- 页脚 ---------- */
.site-footer{position:relative;margin-top:clamp(48px,7vw,96px);background-color:var(--ink);background-image:radial-gradient(circle at 10% 0%,rgba(11,110,138,.55),transparent 55%),radial-gradient(circle at 90% 100%,rgba(242,138,46,.2),transparent 52%);color:rgba(255,249,240,.82)}
.site-footer__edge{height:8px;background:repeating-linear-gradient(90deg,var(--gold) 0 10px,transparent 10px 20px);opacity:.55}
.site-footer__inner{display:grid;grid-template-columns:minmax(260px,1.5fr) repeat(3,minmax(150px,1fr));gap:clamp(24px,4vw,48px);width:100%;max-width:var(--maxw);margin:0 auto;padding:clamp(32px,5vw,58px) var(--gutter) clamp(20px,3vw,32px)}
.footer-brand__name{margin:0 0 10px;font-size:24px;font-weight:900;letter-spacing:.06em;color:var(--paper)}
.footer-brand__desc{margin:0 0 14px;max-width:34ch;font-size:14.5px;line-height:1.8;color:rgba(255,249,240,.76)}
.footer-brand__edition{margin:0 0 18px;font-size:12.5px;font-family:var(--font-mono);letter-spacing:.08em;color:rgba(255,249,240,.55)}
.to-top{display:inline-flex;align-items:center;gap:8px;padding:9px 18px;border:1px solid rgba(255,249,240,.32);border-radius:999px;background:transparent;color:var(--paper);font-family:inherit;font-size:13px;font-weight:700;letter-spacing:.08em;cursor:pointer;transition:background var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease)}
.to-top::before{content:"↑";font-family:var(--font-mono);font-size:14px}
.to-top:hover{background:var(--gold);border-color:var(--gold);color:var(--ink)}
.footer-col__title{margin:0 0 14px;font-size:12.5px;font-weight:800;letter-spacing:.2em;color:var(--gold);text-transform:uppercase}
.footer-col__list{display:grid;gap:9px;margin:0;padding:0}
.footer-col__link{color:rgba(255,249,240,.82);font-size:14.5px;font-weight:500;text-decoration:none;transition:color var(--dur) var(--ease)}
.footer-col__link:hover{color:var(--sun);text-decoration:underline}
.footer-contact{display:grid;gap:8px;margin:16px 0 0;padding:14px 0 0;border-top:1px dashed rgba(255,249,240,.2)}
.footer-contact__item{font-family:var(--font-mono);font-size:13px;line-height:1.6;color:rgba(255,249,240,.68);word-break:break-word}
.footer-contact__item--note{font-family:var(--font-body);font-size:12.5px;line-height:1.7;color:rgba(255,249,240,.5)}
.footer-icp{margin:16px 0 0;font-family:var(--font-mono);font-size:12.5px;letter-spacing:.04em;color:rgba(255,249,240,.6)}
.footer-meta{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px;width:100%;max-width:var(--maxw);margin:0 auto;padding:16px var(--gutter) clamp(24px,4vw,34px);border-top:1px solid rgba(255,249,240,.12)}
.footer-meta__copy{margin:0;font-family:var(--font-mono);font-size:12.5px;color:rgba(255,249,240,.6)}
.footer-meta__note{margin:0;font-size:12.5px;letter-spacing:.06em;color:rgba(255,249,240,.45)}

/* ---------- 通用布局 ---------- */
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 var(--gutter)}
.container--narrow{max-width:820px}
.container--wide{max-width:1420px}
.section{padding:clamp(40px,6vw,88px) 0}
.section__head{max-width:62ch;margin-bottom:clamp(20px,3vw,36px)}
.section__title{margin:0 0 12px;font-size:clamp(28px,4vw,48px);font-weight:900;line-height:1.06;letter-spacing:-.02em}
.section__lead{margin:0;font-size:17px;color:var(--mist)}
.grid{display:grid;gap:clamp(16px,2.4vw,28px)}
.grid--2{grid-template-columns:repeat(auto-fit,minmax(270px,1fr))}
.grid--3{grid-template-columns:repeat(auto-fit,minmax(230px,1fr))}
.grid--split{grid-template-columns:minmax(0,38fr) minmax(0,62fr);align-items:start}

/* ---------- 卡片 / 标签 ---------- */
.card{background:#fff;border:1.5px solid var(--line);border-radius:var(--r-md);padding:clamp(18px,2.4vw,28px);transition:transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease),border-color var(--dur) var(--ease)}
.card:hover{transform:translateY(-3px);border-color:rgba(11,110,138,.35);box-shadow:0 14px 26px -20px rgba(23,38,46,.65)}
.card--paper{background:var(--paper);box-shadow:0 6px 0 -3px rgba(23,38,46,.08),0 18px 30px -26px rgba(23,38,46,.5)}
.card--lake{background:var(--lake-soft);border-color:rgba(11,110,138,.3)}
.card__index{display:block;margin-bottom:10px;font-family:var(--font-mono);font-size:13px;font-weight:700;letter-spacing:.12em;color:var(--gold)}
.card__title{margin:0 0 8px;font-size:clamp(19px,2vw,22px);font-weight:800;line-height:1.3}
.card__text{margin:0;font-size:15.5px;color:var(--mist)}
.label-tag{display:inline-flex;align-items:center;gap:6px;padding:4px 11px;border:1px solid rgba(11,110,138,.25);border-radius:6px;background:var(--lake-soft);color:var(--lake-deep);font-size:13px;font-weight:700;letter-spacing:.08em;line-height:1.5}
.label-tag--gold{background:rgba(255,209,102,.28);border-color:var(--gold);color:#7A5A12}
.label-tag--orange{background:rgba(242,138,46,.18);border-color:var(--orange);color:#8A4A0C}
.label-tag--coral{background:rgba(217,85,63,.14);border-color:var(--coral);color:#9E3626}
.label-tag--teal{background:rgba(46,158,126,.14);border-color:var(--teal);color:#186A54}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 26px;border:1.5px solid transparent;border-radius:999px;font-family:inherit;font-size:16px;font-weight:800;letter-spacing:.02em;text-decoration:none;cursor:pointer;transition:transform var(--dur) var(--ease),background var(--dur) var(--ease),color var(--dur) var(--ease),box-shadow var(--dur) var(--ease)}
.btn:hover{transform:translateY(-2px)}
.btn--primary{background:var(--orange);color:var(--ink);box-shadow:0 4px 0 0 rgba(23,38,46,.2)}
.btn--primary:hover{background:#E97C1E;color:var(--ink)}
.btn--lake{background:var(--lake);color:#fff;box-shadow:0 4px 0 0 rgba(23,38,46,.18)}
.btn--lake:hover{background:var(--lake-deep);color:#fff}
.btn--ghost{background:transparent;border-color:var(--ink);color:var(--ink)}
.btn--ghost:hover{background:var(--sun);border-color:var(--gold);color:var(--ink)}

/* ---------- 面包屑 ---------- */
.breadcrumb{margin:clamp(16px,2vw,24px) 0 0;font-size:13px;color:var(--mist)}
.breadcrumb__list{display:flex;flex-wrap:wrap;align-items:center;gap:4px}
.breadcrumb__item{display:flex;align-items:center;gap:4px}
.breadcrumb__item:not(:last-child)::after{content:"／";color:var(--gold);font-size:12px}
.breadcrumb__link{color:var(--lake);font-weight:600;text-decoration:none}
.breadcrumb__link:hover{text-decoration:underline}
.breadcrumb__current{color:var(--ink);font-weight:700}

/* ---------- 正文 ---------- */
.prose{max-width:72ch;font-size:17px;line-height:1.8}
.prose h2{margin:2em 0 .6em;font-size:clamp(26px,3vw,36px);font-weight:900;line-height:1.2;letter-spacing:-.01em}
.prose h3{margin:1.8em 0 .5em;font-size:clamp(20px,2vw,26px);font-weight:800;line-height:1.3}
.prose p{margin:0 0 1.1em}
.prose ul,.prose ol{margin:0 0 1.2em;padding-left:1.3em;list-style:revert}
.prose li{margin-bottom:.4em}
.prose blockquote{margin:1.6em 0;padding:16px 22px;border-left:4px solid var(--gold);border-radius:0 var(--r-sm) var(--r-sm) 0;background:var(--lake-soft);color:var(--lake-deep);font-weight:600}
.prose a{color:var(--lake);font-weight:600}

/* ---------- 图片框 ---------- */
.media-frame{position:relative;overflow:hidden;border:1.5px solid var(--line);border-radius:var(--r-lg);background-image:linear-gradient(160deg,var(--lake-soft) 0%,#FFFFFF 58%,#FFEFD9 100%);aspect-ratio:16/10}
.media-frame__img{display:block;width:100%;height:100%;object-fit:cover}
.media-frame__caption{position:absolute;left:12px;bottom:12px;max-width:calc(100% - 24px);padding:6px 12px;border-radius:var(--r-sm);background:rgba(255,249,240,.94);color:var(--mist);font-size:12.5px;font-weight:700;letter-spacing:.04em}
.media-frame--tall{aspect-ratio:4/5}
.media-frame--wide{aspect-ratio:21/9}

/* ---------- 动效协议 ---------- */
.js-ready [data-reveal]{opacity:0;transform:translateY(16px);transition:opacity 320ms var(--ease),transform 320ms var(--ease)}
.js-ready [data-reveal].is-visible{opacity:1;transform:translateY(0)}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .site-footer__inner{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}
  .grid--split{grid-template-columns:1fr}
}
@media (max-width:960px){
  .masthead__note{display:none}
}
@media (max-width:879px){
  body{font-size:16px}
  .masthead__bar{grid-template-columns:1fr auto;padding:14px 0 6px}
  .brand__mark{width:40px;height:40px;font-size:20px;border-radius:12px}
  .nav-toggle{display:inline-flex}
  .site-nav{display:none;padding:0 0 12px}
  .site-nav[data-open]{display:block}
  .site-nav__list{flex-direction:column;align-items:stretch;gap:2px;padding:8px;border-radius:var(--r-md)}
  .site-nav__link{padding:13px 16px;border-radius:12px;font-size:16px}
  .site-nav__link[aria-current="page"]{box-shadow:inset 4px 0 0 0 var(--gold)}
  .utility-bar{flex-direction:column;align-items:flex-start;gap:10px}
  .utility-bar__hint{display:none}
  .utility-bar__link{font-size:13px}
}
@media (max-width:600px){
  .site-footer__inner{grid-template-columns:1fr;padding-top:clamp(26px,6vw,34px)}
  .footer-brand__desc{max-width:100%}
  .footer-meta{flex-direction:column;align-items:flex-start}
  .section{padding:clamp(32px,7vw,48px) 0}
  .btn{width:100%}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important;scroll-behavior:auto!important}
  .js-ready [data-reveal]{opacity:1;transform:none}
  .card:hover,.btn:hover{transform:none}
}