/* =========================================================
   breeze-k8.com.cn — 共享外壳样式 /assets/site.css
   目录：01 变量 · 02 reset · 03 排版 · 04 按钮 · 05 布局与组件
        06 头部 · 07 页脚 · 08 工具类 · 09 响应式 · 10 动效降级
   ========================================================= */

/* 01 变量 */
:root{
  --celadon:#2F6F63;
  --lake:#2C6E8F;
  --ink:#123B3A;
  --ink-deep:#0E2F2E;
  --cream:#F8F2E7;
  --sand:#D8D1C3;
  --coral:#C85333;
  --mist:#DCEBE6;
  --indigo:#2B4A6F;
  --wine:#6F3A45;
  --gold:#C9A86A;

  --ink-80:rgba(18,59,58,.82);
  --ink-60:rgba(18,59,58,.60);
  --cream-80:rgba(248,242,231,.82);
  --cream-60:rgba(248,242,231,.62);
  --cream-40:rgba(248,242,231,.42);

  --rail-w:268px;
  --bar-h:56px;
  --maxw:1180px;
  --radius:22px;
  --radius-sm:14px;
  --shadow-soft:0 22px 48px -34px rgba(18,59,58,.55);
  --ease:cubic-bezier(.22,.7,.24,1);

  --font-sans:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Noto Sans SC","Microsoft YaHei",sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,"Liberation Mono",monospace;
}

/* 02 reset */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:calc(var(--bar-h) + 24px)}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,blockquote,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,picture{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
::selection{background:var(--mist);color:var(--ink)}

/* 03 排版与页面基础 */
body{
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.8;
  color:var(--ink);
  background:var(--cream);
  padding-top:var(--bar-h);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
h1,h2,h3,h4,h5{font-weight:800;line-height:1.2;letter-spacing:-.01em;color:var(--ink)}
h1{font-size:clamp(40px,6vw,84px);line-height:1.06;letter-spacing:-.02em}
h2{font-size:clamp(26px,3.4vw,42px)}
h3{font-size:clamp(19px,2vw,24px);letter-spacing:0;line-height:1.35}
h4{font-size:17px;letter-spacing:.01em}
.display{font-size:clamp(40px,6vw,84px);line-height:1.06;letter-spacing:-.02em;font-weight:800}
.h2{font-size:clamp(26px,3.4vw,42px);font-weight:800;line-height:1.2}
.h3{font-size:clamp(19px,2vw,24px);font-weight:700;line-height:1.35}
.label{display:inline-block;font-size:12px;letter-spacing:.26em;color:var(--celadon);font-weight:600}
.lead{font-size:clamp(16px,1.35vw,19px);line-height:1.85;color:var(--ink-80)}
.prose{font-size:17px;line-height:1.88;color:var(--ink-80)}
.prose p{max-width:68ch}
.prose p+p{margin-top:1em}
.prose h2,.prose h3{margin-top:2em;margin-bottom:.6em}
.prose ul,.prose ol{margin:1em 0;padding-left:1.2em;list-style:disc}
.prose li+li{margin-top:.4em}
.prose a{color:var(--lake);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px}
.prose a:hover{color:var(--celadon)}
.numeric{font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1;font-family:var(--font-mono);letter-spacing:.02em}
.annot{font-size:11px;letter-spacing:.3em;color:var(--ink-60);writing-mode:vertical-rl;text-orientation:mixed;white-space:nowrap}

/* 04 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 24px;border-radius:999px;border:1px solid transparent;
  font-size:14px;font-weight:600;letter-spacing:.06em;line-height:1.4;text-align:center;
  transition:background .25s var(--ease),color .25s var(--ease),border-color .25s var(--ease),transform .25s var(--ease),box-shadow .25s var(--ease);
}
.btn:hover{transform:translateY(-2px)}
.btn:active{transform:translateY(0)}
.btn--sm{padding:8px 16px;font-size:12.5px;letter-spacing:.08em}
.btn--coral{background:var(--coral);color:#fff;box-shadow:0 14px 28px -18px rgba(200,83,51,.95)}
.btn--coral:hover{background:#B04527}
.btn--solid{background:var(--celadon);color:#fff;box-shadow:0 14px 28px -20px rgba(47,111,99,.95)}
.btn--solid:hover{background:#275F55}
.btn--ghost{background:transparent;color:var(--ink);border-color:var(--sand)}
.btn--ghost:hover{border-color:var(--celadon);color:var(--celadon)}
.btn--light{background:var(--cream);color:var(--ink)}
.btn--light:hover{background:#fff}
.btn--line{background:transparent;color:var(--cream);border-color:rgba(248,242,231,.38)}
.btn--line:hover{border-color:var(--gold);color:var(--gold)}

/* 05 布局与通用组件 */
.wrap{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:clamp(20px,4vw,48px)}
.site-main{display:block}
.section{padding-block:clamp(48px,7vw,96px)}
.section--tight{padding-block:clamp(30px,4vw,56px)}
.divider{height:1px;border:0;background:var(--sand);opacity:.9}

.grid{display:grid;gap:clamp(16px,2vw,28px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--auto{grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
.grid--12{grid-template-columns:repeat(12,minmax(0,1fr))}

.card{
  background:#fff;border:1px solid var(--sand);border-radius:var(--radius);
  padding:clamp(20px,2.4vw,32px);box-shadow:var(--shadow-soft);
}
.card--mist{background:var(--mist);border-color:transparent}
.card--sand{background:#F1EADC;border-color:rgba(216,209,195,.7)}
.card--ink{background:var(--ink);color:var(--cream-80);border-color:transparent}
.card--ink h2,.card--ink h3,.card--ink h4{color:var(--cream)}
.card--indigo{background:var(--indigo);color:rgba(255,255,255,.84);border-color:transparent}
.card--indigo h2,.card--indigo h3,.card--indigo h4{color:#fff}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:999px;
  font-size:11.5px;letter-spacing:.16em;font-weight:600;
  background:var(--mist);color:var(--celadon);
}
.tag--coral{background:rgba(200,83,51,.12);color:var(--coral)}
.tag--gold{background:rgba(201,168,106,.22);color:#8A6E33}
.tag--indigo{background:rgba(43,74,111,.12);color:var(--indigo)}

/* 图片容器基础规则（共享头尾不放图，页面阶段放入 img） */
.media{
  position:relative;display:block;overflow:hidden;
  border-radius:var(--radius);border:1px solid rgba(216,209,195,.75);
  background:linear-gradient(145deg,var(--mist) 0%,#F1EADC 70%,#EFE7D9 100%);
  width:100%;
}
.media > img,.media > picture > img{width:100%;height:100%;object-fit:cover;object-position:center}
.media--wide{aspect-ratio:16/9}
.media--tall{aspect-ratio:4/5}
.media--square{aspect-ratio:1/1}
.media--pan{aspect-ratio:21/9}
.media--soft{border-radius:var(--radius-sm)}
.media__caption{
  position:absolute;left:14px;bottom:14px;right:14px;
  font-size:11.5px;letter-spacing:.14em;color:var(--ink-80);
  background:rgba(248,242,231,.86);backdrop-filter:blur(6px);
  border-radius:10px;padding:6px 10px;
}

.breadcrumbs{
  font-size:12px;letter-spacing:.12em;color:var(--ink-60);
  padding-block:14px;
}
.breadcrumbs__list{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.breadcrumbs__item{display:inline-flex;align-items:center;gap:8px}
.breadcrumbs__item:not(:last-child)::after{content:"／";color:var(--sand)}
.breadcrumbs__link{color:var(--lake);transition:color .2s}
.breadcrumbs__link:hover{color:var(--celadon);text-decoration:underline;text-underline-offset:3px}
.breadcrumbs__item[aria-current="page"]{color:var(--ink-60)}

/* 目录跟随高亮协议（页面内目录链接使用 data-section-link） */
[data-section-link]{color:var(--ink-60);transition:color .2s var(--ease)}
[data-section-link]:hover{color:var(--celadon)}
[data-section-link].is-active{color:var(--celadon);font-weight:700}

/* 06 头部 */
.site-header{position:relative;z-index:70}

.skip-link{
  position:fixed;top:10px;left:10px;z-index:300;
  padding:10px 18px;border-radius:999px;
  background:var(--ink);color:#fff;font-size:13px;letter-spacing:.12em;
  transform:translateY(-180%);
  transition:transform .25s var(--ease);
}
.skip-link:focus{transform:translateY(0)}

.command-bar{
  position:fixed;top:0;left:0;right:0;height:var(--bar-h);z-index:65;
  display:flex;align-items:center;
  background:rgba(248,242,231,.82);
  -webkit-backdrop-filter:blur(14px) saturate(1.25);
  backdrop-filter:blur(14px) saturate(1.25);
  border-bottom:1px solid rgba(216,209,195,.85);
}
.command-bar__inner{
  width:100%;max-width:var(--maxw);margin-inline:auto;
  padding-left:70px;padding-right:clamp(14px,3vw,32px);
  display:flex;align-items:center;justify-content:space-between;gap:14px;
}
.command-bar__note{
  display:inline-flex;align-items:center;gap:10px;
  font-size:12.5px;letter-spacing:.14em;color:var(--ink-80);
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.command-bar__dot{
  width:7px;height:7px;border-radius:50%;background:var(--coral);
  box-shadow:0 0 0 4px rgba(200,83,51,.14);flex:0 0 auto;
}
.command-bar__actions{display:flex;align-items:center;gap:clamp(10px,2vw,22px);flex:0 0 auto}
.command-bar__enter{
  font-size:12.5px;letter-spacing:.14em;color:var(--ink);
  text-decoration:underline;text-underline-offset:5px;
  text-decoration-color:var(--sand);text-decoration-thickness:1px;
  transition:color .2s var(--ease),text-decoration-color .2s var(--ease);
}
.command-bar__enter:hover{color:var(--celadon);text-decoration-color:var(--celadon)}

/* 移动抽屉按钮 */
.nav-toggle{
  position:fixed;top:9px;left:10px;z-index:90;
  display:inline-flex;align-items:center;gap:9px;
  padding:9px 14px;border-radius:12px;
  background:var(--ink);color:var(--cream);
  font-size:12px;letter-spacing:.18em;
  box-shadow:0 12px 26px -16px rgba(18,59,58,.9);
}
.nav-toggle__bars{display:flex;flex-direction:column;justify-content:center;gap:3px;width:16px;height:14px}
.nav-toggle__bar{
  display:block;height:2px;border-radius:2px;background:currentColor;
  transition:transform .3s var(--ease),opacity .2s var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1){transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3){transform:translateY(-5px) rotate(-45deg)}
.nav-toggle__text{line-height:1}

/* 左侧垂直目录轨 */
.rail{
  position:fixed;top:0;left:0;bottom:0;z-index:80;
  width:min(84vw,320px);
  display:flex;flex-direction:column;gap:26px;
  padding:24px 20px 22px;
  overflow-y:auto;overscroll-behavior:contain;
  color:var(--cream-80);
  background-color:var(--ink);
  background-image:
    radial-gradient(120% 55% at 0% 0%,rgba(47,111,99,.60),rgba(47,111,99,0) 62%),
    radial-gradient(90% 42% at 100% 100%,rgba(43,74,111,.55),rgba(43,74,111,0) 70%),
    linear-gradient(180deg,#123B3A 0%,#0E2F2E 100%);
  box-shadow:24px 0 60px -46px rgba(18,59,58,.9);
  transform:translateX(-103%);
  transition:transform .42s var(--ease);
}
.rail[data-open]{transform:translateX(0)}

.rail__brand{display:flex;align-items:center;gap:12px;color:var(--cream);padding-block:2px}
.rail__mark{
  flex:0 0 44px;width:44px;height:44px;display:grid;place-items:center;
  border-radius:14px;background:var(--cream);color:var(--ink);
  font-weight:800;font-size:20px;line-height:1;
  box-shadow:inset 0 0 0 1px rgba(201,168,106,.55);
}
.rail__brand-text{display:block;min-width:0}
.rail__brand-name{display:block;font-size:18px;font-weight:800;letter-spacing:.02em;line-height:1.25}
.rail__brand-line{display:block;margin-top:4px;font-size:10.5px;letter-spacing:.18em;color:var(--cream-40)}

.rail__nav{flex:1 1 auto;min-height:0}
.rail__nav-title{
  display:flex;align-items:center;gap:10px;
  font-size:11px;letter-spacing:.3em;color:var(--cream-40);
  margin-bottom:14px;
}
.rail__nav-rule{flex:1 1 auto;height:1px;background:rgba(248,242,231,.18)}
.rail__list{display:flex;flex-direction:column;gap:2px}
.rail__item{display:block}
.rail__link{
  position:relative;display:flex;align-items:center;gap:12px;
  padding:11px 12px;border-radius:12px;
  color:rgba(248,242,231,.78);
  transition:background .25s var(--ease),color .25s var(--ease),transform .25s var(--ease);
}
.rail__idx{
  font-family:var(--font-mono);font-variant-numeric:tabular-nums;
  font-size:11px;letter-spacing:.1em;color:var(--cream-40);
  min-width:20px;transition:color .25s var(--ease);
}
.rail__label{font-size:15px;letter-spacing:.04em;line-height:1.4}
.rail__link:hover{background:rgba(248,242,231,.08);color:#fff;transform:translateX(3px)}
.rail__link[aria-current="page"]{background:rgba(248,242,231,.13);color:#fff}
.rail__link[aria-current="page"] .rail__idx{color:var(--gold)}
.rail__link[aria-current="page"]::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:3px;height:18px;border-radius:3px;background:var(--gold);
}

.rail__foot{
  display:flex;flex-direction:column;gap:10px;
  padding-top:16px;border-top:1px solid rgba(248,242,231,.16);
}
.rail__note{font-size:11px;line-height:1.9;letter-spacing:.08em;color:var(--cream-40)}
.rail__foot-link{
  align-self:flex-start;
  font-size:12px;letter-spacing:.16em;color:var(--gold);
  text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:1px;
  transition:color .2s var(--ease);
}
.rail__foot-link:hover{color:var(--cream)}

.nav-scrim{
  position:fixed;inset:0;z-index:76;
  background:rgba(14,47,46,.5);
  -webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);
  opacity:0;pointer-events:none;
  transition:opacity .3s var(--ease);
}
.nav-scrim[data-visible]{opacity:1;pointer-events:auto}

/* 07 页脚 */
.site-footer{
  position:relative;overflow:hidden;
  margin-top:clamp(48px,8vw,110px);
  padding-block:clamp(42px,6vw,78px) 26px;
  background-color:var(--ink);
  background-image:
    radial-gradient(80% 60% at 100% 0%,rgba(47,111,99,.55),rgba(47,111,99,0) 66%),
    linear-gradient(180deg,#123B3A 0%,#0E2F2E 100%);
  color:var(--cream-80);
}
.site-footer::before{
  content:"";position:absolute;left:0;right:0;top:0;height:3px;
  background:linear-gradient(90deg,var(--celadon) 0%,var(--gold) 38%,var(--indigo) 68%,var(--coral) 100%);
}
.site-footer::after{
  content:"";position:absolute;right:-12%;bottom:-32%;
  width:min(520px,72vw);aspect-ratio:1;border-radius:50%;
  background:radial-gradient(circle at 35% 35%,rgba(201,168,106,.26),rgba(201,168,106,0) 66%);
  pointer-events:none;
}
.footer__inner{
  position:relative;z-index:1;
  width:100%;max-width:var(--maxw);margin-inline:auto;
  padding-inline:clamp(20px,4vw,48px);
}
.footer__top{display:grid;grid-template-columns:1fr;gap:clamp(28px,4vw,56px)}

.footer__brand{display:flex;flex-direction:column;align-items:flex-start;gap:14px;max-width:40ch}
.footer__mark{
  width:52px;height:52px;display:grid;place-items:center;border-radius:16px;
  background:linear-gradient(150deg,var(--celadon),#1E4F46);
  color:var(--cream);font-weight:800;font-size:22px;line-height:1;
  border:1px solid rgba(201,168,106,.55);
}
.footer__title{font-size:clamp(20px,2.2vw,26px);font-weight:800;letter-spacing:.02em;color:var(--cream)}
.footer__line{font-size:14px;line-height:1.9;color:var(--cream-60)}

.footer__nav{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(18px,3vw,40px)}
.footer__group{min-width:0}
.footer__group-title{
  font-size:11px;letter-spacing:.24em;color:var(--gold);
  padding-bottom:10px;margin-bottom:12px;
  border-bottom:1px solid rgba(248,242,231,.16);
}
.footer__links{display:flex;flex-direction:column;gap:9px}
.footer__link{
  display:inline-block;font-size:14px;letter-spacing:.03em;
  color:rgba(248,242,231,.76);
  transition:color .2s var(--ease),transform .2s var(--ease),text-decoration-color .2s var(--ease);
}
.footer__link:hover{color:var(--cream);transform:translateX(3px)}

.footer__contact{
  display:flex;flex-wrap:wrap;gap:16px clamp(24px,4vw,48px);
  margin-top:clamp(28px,4vw,46px);padding-top:24px;
  border-top:1px solid rgba(248,242,231,.14);
}
.footer__contact-item{display:flex;flex-direction:column;gap:3px;min-width:0;flex:1 1 220px}
.footer__contact-key{font-size:11px;letter-spacing:.2em;color:var(--cream-40)}
.footer__contact-val{font-size:14px;line-height:1.7;color:rgba(248,242,231,.88);word-break:break-word}
.footer__note{
  margin-top:14px;max-width:72ch;
  font-size:12px;line-height:1.9;color:rgba(248,242,231,.46);
}
.footer__bottom{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px clamp(14px,2.4vw,26px);
  margin-top:clamp(24px,3vw,36px);padding-top:18px;
  border-top:1px solid rgba(248,242,231,.14);
  font-size:12px;letter-spacing:.06em;color:rgba(248,242,231,.52);
}
.footer__icp{letter-spacing:.1em}
.footer__copy{color:rgba(248,242,231,.62)}
.footer__link--rule{
  font-size:12px;color:rgba(248,242,231,.62);
  text-decoration:underline;text-underline-offset:4px;
  text-decoration-color:rgba(248,242,231,.3);text-decoration-thickness:1px;
}
.footer__link--rule:hover{color:var(--gold);text-decoration-color:var(--gold)}

/* 08 工具类与浮动控件 */
.sr-only{
  position:absolute;width:1px;height:1px;padding:0;margin:-1px;
  overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);
  white-space:nowrap;border:0;
}
.to-top{
  position:fixed;right:18px;bottom:20px;z-index:72;
  width:48px;height:48px;display:grid;place-items:center;
  border-radius:50%;background:var(--ink);color:var(--cream);
  box-shadow:0 18px 34px -20px rgba(18,59,58,.95);
  opacity:0;transform:translateY(14px);pointer-events:none;
  transition:opacity .3s var(--ease),transform .3s var(--ease),background .2s var(--ease);
}
.to-top[data-visible]{opacity:1;transform:translateY(0);pointer-events:auto}
.to-top:hover{background:var(--celadon)}
.to-top__arrow{
  width:10px;height:10px;margin-top:4px;
  border-left:2px solid currentColor;border-top:2px solid currentColor;
  transform:rotate(45deg);
}

/* 焦点可见 */
:focus-visible{outline:3px solid var(--lake);outline-offset:3px;border-radius:4px}
.rail :focus-visible,.site-footer :focus-visible{outline-color:var(--gold)}
.btn:focus-visible,.nav-toggle:focus-visible{outline-offset:4px}

/* 09 响应式 */
@media (min-width:1024px){
  body{padding-left:var(--rail-w)}
  .rail{
    width:var(--rail-w);
    transform:translateX(0);
    transition:none;
    box-shadow:24px 0 70px -50px rgba(18,59,58,.95);
  }
  .nav-toggle{display:none}
  .nav-scrim{display:none}
  .command-bar{left:var(--rail-w)}
  .command-bar__inner{padding-left:clamp(20px,3vw,36px)}
}
@media (min-width:760px){
  .footer__top{grid-template-columns:minmax(0,1fr) minmax(0,1.5fr)}
}
@media (max-width:900px){
  .grid--2,.grid--3,.grid--12{grid-template-columns:1fr}
  .media--pan{aspect-ratio:16/9}
}
@media (max-width:620px){
  .command-bar__note{display:none}
  .command-bar__inner{justify-content:flex-end}
  .footer__nav{grid-template-columns:repeat(2,minmax(0,1fr));gap:22px 18px}
  .footer__contact-item{flex:1 1 100%}
  .to-top{right:14px;bottom:14px;width:44px;height:44px}
}
@media (max-width:380px){
  .nav-toggle__text{display:none}
}

/* 10 动效降级 */
@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;
  }
}