/* ============================================================
   旭博品牌站 · 共享样式 /assets/site.css
   深海蓝轨道 · 米白网格纸 · 旭日橙命令 · 薄荷绿确认
   ============================================================ */

:root{
  --sea:#0B2A4A;
  --harbor:#123B63;
  --mist:#DDE8F0;
  --sun:#F26B2A;
  --warm:#FF9B57;
  --mint:#72C7A3;
  --silver:#B8C2CC;
  --stone:#6E767C;
  --cream:#F6F1E7;
  --clay:#B65C3A;
  --moss:#5C715A;

  --rail-w:240px;
  --line:2px solid var(--sea);
  --shadow:6px 6px 0 rgba(11,42,74,.16);
  --shadow-lift:10px 10px 0 rgba(11,42,74,.26);

  --sans:"HarmonyOS Sans SC","Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --mono:"IBM Plex Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --fast:160ms ease-out;
  --slow:260ms ease-out;
  --scroll-progress:0;
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  padding-left:0;
  background-color:var(--cream);
  background-image:
    linear-gradient(rgba(11,42,74,.045) 1px,transparent 1px),
    linear-gradient(90deg,rgba(11,42,74,.045) 1px,transparent 1px);
  background-size:64px 64px;
  color:var(--sea);
  font-family:var(--sans);
  font-size:17px;
  line-height:1.75;
  font-weight:400;
  letter-spacing:.01em;
}
h1,h2,h3,h4,h5,h6,p,figure,blockquote,dl,dd,address{margin:0}
img,svg{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit}
:focus-visible{outline:3px solid var(--sun);outline-offset:3px}
.site-header :focus-visible,.site-footer :focus-visible{outline-color:var(--mint)}

/* ---------- 基础排版工具 ---------- */
.container{width:100%;max-width:1240px;margin-inline:auto;padding-inline:clamp(16px,4vw,44px)}
.page-main{padding-block:clamp(24px,4vw,56px) clamp(48px,6vw,96px)}
.display{font-size:clamp(2.5rem,5.4vw,4.4rem);line-height:1.04;font-weight:600;letter-spacing:-.02em}
.display--xl{font-size:clamp(3rem,7.2vw,6.2rem)}
.section{margin-top:clamp(40px,5vw,72px)}
.section__head{display:flex;flex-wrap:wrap;align-items:baseline;gap:8px 20px;padding-bottom:12px;border-bottom:2px solid var(--sea);margin-bottom:clamp(16px,2vw,26px)}
.section__head h2,.section__title{font-size:clamp(1.5rem,2.6vw,2.5rem);font-weight:600;line-height:1.16;letter-spacing:-.01em}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-family:var(--mono);font-size:11px;letter-spacing:.16em;color:var(--stone)}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--sun)}
.lede{max-width:62ch;font-size:clamp(1.02rem,1.2vw,1.18rem);line-height:1.75;color:var(--harbor)}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums;letter-spacing:.04em}
.prose{max-width:68ch}
.prose p + p{margin-top:1em}
.prose a{color:var(--clay);text-decoration:underline;text-underline-offset:3px}
.prose a:hover{color:var(--sun)}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

/* ---------- 跳转链接 ---------- */
.skip-link{
  position:fixed;top:10px;left:10px;z-index:200;
  transform:translateY(-180%);
  padding:11px 20px;
  background:var(--sun);color:var(--sea);
  border:2px solid var(--sea);
  box-shadow:4px 4px 0 rgba(11,42,74,.4);
  font-weight:700;font-size:14px;letter-spacing:.04em;
  transition:transform var(--fast);
}
.skip-link:focus{transform:translateY(0)}

/* ---------- 头部 · 品牌轨道 ---------- */
.site-header{
  position:fixed;top:0;left:0;bottom:0;width:var(--rail-w);z-index:60;
  background:var(--sea);
  background-image:linear-gradient(180deg,var(--sea),var(--harbor));
  color:var(--cream);
  border-right:2px solid var(--harbor);
}
.rail{
  display:flex;flex-direction:column;
  height:100%;overflow-y:auto;
  padding:24px 18px 18px;
}
.rail__brand{
  display:grid;grid-template-columns:auto 1fr;align-items:center;gap:12px;
  padding-bottom:16px;border-bottom:1px solid rgba(246,241,231,.2);
  transition:transform var(--fast);
}
.rail__brand:hover{transform:translateX(3px)}
.rail__mark{
  position:relative;display:block;width:42px;height:42px;
  background:var(--sun);
  box-shadow:4px 4px 0 rgba(0,0,0,.32);
}
.rail__mark::before{content:"";position:absolute;inset:8px;border:2px solid var(--sea)}
.rail__mark::after{content:"";position:absolute;left:8px;right:8px;top:50%;height:2px;background:var(--sea)}
.rail__names{display:flex;flex-direction:column;gap:3px;min-width:0}
.rail__title{font-size:18px;font-weight:700;line-height:1.25;letter-spacing:.02em;color:var(--cream)}
.rail__sub{font-family:var(--mono);font-size:10px;letter-spacing:.1em;color:rgba(221,232,240,.72);line-height:1.4}
.rail__hint{
  margin:16px 0 10px;
  font-family:var(--mono);font-size:10.5px;letter-spacing:.08em;
  color:rgba(221,232,240,.55);
}
.nav-toggle{display:none;align-items:center;gap:8px;padding:9px 13px;background:transparent;color:var(--cream);border:2px solid rgba(246,241,231,.5);cursor:pointer;font-size:13px;font-weight:600;letter-spacing:.06em;transition:border-color var(--fast),background var(--fast)}
.nav-toggle:hover{border-color:var(--mint);background:rgba(114,199,163,.12)}
.nav-toggle__label{line-height:1}
.nav-toggle__bars{position:relative;display:block;width:18px;height:2px;background:currentColor}
.nav-toggle__bars::before,.nav-toggle__bars::after{content:"";position:absolute;left:0;width:18px;height:2px;background:currentColor;transition:transform var(--fast)}
.nav-toggle__bars::before{top:-6px}
.nav-toggle__bars::after{top:6px}
.site-header[data-open] .nav-toggle__bars{background:transparent}
.site-header[data-open] .nav-toggle__bars::before{transform:translateY(6px) rotate(45deg)}
.site-header[data-open] .nav-toggle__bars::after{transform:translateY(-6px) rotate(-45deg)}

.site-nav{margin-top:18px}
.site-nav__list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:2px}
.site-nav__link{
  display:flex;align-items:center;gap:10px;
  padding:10px 10px;
  border-left:3px solid transparent;
  color:var(--mist);font-size:15px;line-height:1.4;
  transition:background var(--fast),color var(--fast),border-color var(--fast),transform var(--fast);
}
.site-nav__link:hover{background:rgba(221,232,240,.1);color:#fff;border-left-color:var(--warm);transform:translateX(2px)}
.site-nav__link[aria-current="page"]{background:rgba(242,107,42,.16);color:#fff;border-left-color:var(--sun);font-weight:600}
.site-nav__link[aria-current="page"] .site-nav__idx{color:var(--sun)}
.site-nav__idx{font-family:var(--mono);font-size:11px;letter-spacing:.06em;color:rgba(221,232,240,.5);min-width:18px}

.rail__actions{display:grid;gap:8px;margin-top:auto;padding-top:20px}
.rail__status{
  display:flex;align-items:center;gap:8px;
  margin-top:16px;padding-top:14px;
  border-top:1px solid rgba(246,241,231,.18);
  font-family:var(--mono);font-size:10.5px;letter-spacing:.1em;color:rgba(221,232,240,.72);
}
.rail__status-dot{width:8px;height:8px;border-radius:50%;background:var(--mint);box-shadow:0 0 0 3px rgba(114,199,163,.2)}

/* 阅读进度尺 */
.rail-meter{position:absolute;top:0;right:0;bottom:0;width:4px;background:rgba(221,232,240,.14);overflow:hidden;pointer-events:none}
.rail-meter__fill{
  display:block;width:100%;height:100%;
  background:linear-gradient(180deg,var(--sun),var(--warm) 55%,var(--mint));
  transform:scaleY(var(--scroll-progress));
  transform-origin:top center;
  will-change:transform;
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 18px;
  border:2px solid var(--sea);
  background:var(--cream);color:var(--sea);
  font-size:14px;font-weight:600;letter-spacing:.04em;line-height:1.3;
  cursor:pointer;
  transition:transform var(--fast),box-shadow var(--fast),background var(--fast),color var(--fast),border-color var(--fast);
}
.btn--solid{background:var(--sun);border-color:var(--sea);color:var(--sea);box-shadow:4px 4px 0 rgba(0,0,0,.32)}
.btn--solid:hover{background:var(--warm);transform:translate(-2px,-2px);box-shadow:6px 6px 0 rgba(0,0,0,.36)}
.btn--line{background:transparent;border-color:rgba(246,241,231,.45);color:var(--cream)}
.btn--line:hover{border-color:var(--mint);color:var(--mint);background:rgba(114,199,163,.12);transform:translate(-2px,-2px);box-shadow:4px 4px 0 rgba(0,0,0,.28)}
.btn--outline{background:transparent;border-color:var(--sea);color:var(--sea)}
.btn--outline:hover{background:var(--mist);transform:translate(-2px,-2px);box-shadow:6px 6px 0 rgba(11,42,74,.24)}
.btn--sm{padding:8px 13px;font-size:12.5px;letter-spacing:.06em}

/* ---------- 面包屑 ---------- */
.breadcrumb{margin-bottom:clamp(16px,2vw,26px)}
.breadcrumb__list{list-style:none;display:flex;flex-wrap:wrap;align-items:center;gap:6px;margin:0;padding:0;font-family:var(--mono);font-size:11px;letter-spacing:.1em}
.breadcrumb__item{display:inline-flex;align-items:center;gap:6px;color:var(--stone)}
.breadcrumb__item + .breadcrumb__item::before{content:"/";color:var(--silver)}
.breadcrumb__link{color:var(--stone);border-bottom:1px solid transparent;transition:color var(--fast),border-color var(--fast)}
.breadcrumb__link:hover{color:var(--sun);border-bottom-color:var(--sun)}
.breadcrumb__item[aria-current="page"]{color:var(--sea)}

/* ---------- 网格与卡片 ---------- */
.grid{display:grid;gap:clamp(16px,2vw,26px)}
.grid--2{grid-template-columns:repeat(auto-fit,minmax(min(100%,280px),1fr))}
.grid--3{grid-template-columns:repeat(auto-fit,minmax(min(100%,230px),1fr))}
.grid--split{grid-template-columns:minmax(0,1.35fr) minmax(0,1fr);align-items:start}
@media (max-width:900px){.grid--split{grid-template-columns:minmax(0,1fr)}}

.card{
  position:relative;
  background:#fff;
  border:var(--line);
  padding:clamp(18px,2vw,26px);
  box-shadow:var(--shadow);
  transition:transform var(--fast),box-shadow var(--fast);
}
.card:hover{transform:translate(-3px,-3px);box-shadow:var(--shadow-lift)}
.card__title{font-size:1.12rem;font-weight:600;line-height:1.35}
.card__meta{margin-top:10px;font-family:var(--mono);font-size:11px;letter-spacing:.1em;color:var(--stone)}

.panel{background:var(--mist);border:var(--line);padding:clamp(18px,2.4vw,30px);box-shadow:var(--shadow)}
.panel--harbor{background:var(--harbor);border-color:var(--sea);color:var(--cream);box-shadow:8px 8px 0 rgba(11,42,74,.35)}
.panel--harbor .eyebrow,.panel--harbor .card__meta{color:rgba(221,232,240,.72)}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 10px;
  border:1px solid var(--silver);
  background:var(--mist);color:var(--harbor);
  font-family:var(--mono);font-size:11px;letter-spacing:.1em;line-height:1.7;
}
.tag--sun{background:var(--sun);border-color:var(--sun);color:var(--sea)}
.tag--mint{background:var(--mint);border-color:var(--mint);color:var(--sea)}

.stat{border-left:3px solid var(--sun);padding-left:14px}
.stat__num{display:block;font-family:var(--mono);font-size:clamp(2rem,3.4vw,3rem);font-weight:700;line-height:1.05;letter-spacing:-.02em;color:var(--sea)}
.stat__label{display:block;margin-top:6px;font-size:12px;letter-spacing:.08em;color:var(--stone)}

/* ---------- 通用图片容器（页面阶段使用） ---------- */
.media-frame{
  position:relative;display:block;overflow:hidden;
  aspect-ratio:16/10;
  border:var(--line);
  background:
    linear-gradient(135deg,rgba(11,42,74,.06) 25%,transparent 25%,transparent 50%,rgba(11,42,74,.06) 50%,rgba(11,42,74,.06) 75%,transparent 75%),
    var(--mist);
  background-size:18px 18px,auto;
  box-shadow:var(--shadow);
}
.media-frame img,.media-frame video{display:block;width:100%;height:100%;object-fit:cover}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--tall{aspect-ratio:4/5}
.media-frame__caption{
  position:absolute;left:0;bottom:0;
  padding:6px 12px;
  background:var(--sea);color:var(--cream);
  font-family:var(--mono);font-size:10.5px;letter-spacing:.1em;
}

/* ---------- 显现动效 ---------- */
.js-reveal [data-reveal]{opacity:0;transform:translateY(16px);transition:opacity var(--slow),transform var(--slow)}
.js-reveal [data-reveal].is-visible{opacity:1;transform:none}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;
  background:var(--sea);
  background-image:
    repeating-linear-gradient(135deg,rgba(92,113,90,.22) 0,rgba(92,113,90,.22) 2px,transparent 2px,transparent 10px),
    linear-gradient(180deg,var(--harbor),var(--sea) 60%);
  color:var(--cream);
  border-top:3px solid var(--sun);
  padding-block:clamp(36px,5vw,64px) clamp(20px,3vw,30px);
}
.footer__inner{padding-inline:clamp(16px,4vw,44px)}
.footer__grid{
  display:grid;
  grid-template-columns:minmax(0,1.5fr) minmax(0,1fr) minmax(0,1fr) minmax(0,1.25fr);
  gap:clamp(24px,3vw,44px);
  padding-bottom:clamp(24px,3vw,40px);
  border-bottom:1px solid rgba(246,241,231,.2);
}
.footer__brand{display:flex;flex-direction:column;align-items:flex-start;gap:12px}
.footer__logo{display:inline-flex;align-items:center;gap:12px;transition:transform var(--fast)}
.footer__logo:hover{transform:translateX(3px)}
.footer__mark{
  position:relative;display:block;width:38px;height:38px;
  background:var(--sun);
  box-shadow:4px 4px 0 rgba(0,0,0,.34);
}
.footer__mark::before{content:"";position:absolute;inset:7px;border:2px solid var(--sea)}
.footer__mark::after{content:"";position:absolute;left:7px;right:7px;top:50%;height:2px;background:var(--sea)}
.footer__name{font-size:19px;font-weight:700;letter-spacing:.02em;line-height:1.2}
.footer__tagline{font-family:var(--mono);font-size:11px;letter-spacing:.1em;color:var(--mint)}
.footer__note{font-size:13.5px;line-height:1.7;color:rgba(246,241,231,.72);max-width:38ch}
.footer__col{min-width:0}
.footer__col-title{
  display:flex;align-items:center;gap:8px;
  margin-bottom:14px;
  font-family:var(--mono);font-size:11px;font-weight:600;letter-spacing:.16em;
  color:var(--mist);
}
.footer__col-title::before{content:"";width:16px;height:2px;background:var(--sun)}
.footer__list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:9px}
.footer__link{
  display:inline-block;
  font-size:14.5px;color:rgba(246,241,231,.82);
  border-bottom:1px solid transparent;
  transition:color var(--fast),border-color var(--fast),transform var(--fast);
}
.footer__link:hover{color:var(--sun);border-bottom-color:var(--sun);transform:translateX(2px)}
.footer__contact{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:9px;font-size:13.5px;line-height:1.6;color:rgba(246,241,231,.82)}
.footer__key{
  display:inline-block;min-width:40px;margin-right:10px;
  font-family:var(--mono);font-size:11px;letter-spacing:.1em;color:var(--mint);
}
.footer__col--contact .footer__note{margin-top:14px;max-width:34ch}
.to-top{
  display:inline-flex;align-items:center;gap:8px;
  margin-top:6px;padding:9px 15px;
  background:transparent;color:var(--cream);
  border:2px solid rgba(246,241,231,.45);
  font-size:12.5px;font-weight:600;letter-spacing:.06em;
  cursor:pointer;
  transition:border-color var(--fast),color var(--fast),background var(--fast);
}
.to-top:hover{border-color:var(--mint);color:var(--mint);background:rgba(114,199,163,.12)}
.to-top[hidden]{display:none}
.footer__legal{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px 24px;
  padding-top:clamp(16px,2vw,22px);
}
.footer__copy{font-family:var(--mono);font-size:11px;letter-spacing:.08em;color:rgba(221,232,240,.7)}
.footer__legal-links{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:8px 20px}
.footer__legal-links .footer__link{font-size:12.5px;font-family:var(--mono);letter-spacing:.06em}

/* ---------- 响应式 ---------- */
@media (min-width:1200px){
  body{padding-left:var(--rail-w)}
}

@media (min-width:768px) and (max-width:1199px){
  .site-header{
    position:sticky;top:0;left:auto;right:auto;bottom:auto;
    width:auto;height:auto;
    border-right:0;border-bottom:2px solid var(--harbor);
  }
  .rail{flex-direction:row;flex-wrap:wrap;align-items:center;column-gap:20px;row-gap:8px;padding:12px clamp(16px,3vw,30px);height:auto;overflow:visible}
  .rail__brand{order:1;border-bottom:0;padding-bottom:0}
  .rail__hint{display:none}
  .rail__actions{order:2;display:flex;gap:8px;margin-top:0;margin-left:auto;padding-top:0}
  .site-nav{order:3;flex-basis:100%;margin-top:0;padding-top:8px;border-top:1px solid rgba(246,241,231,.18)}
  .site-nav__list{flex-direction:row;gap:4px;overflow-x:auto;scrollbar-width:thin}
  .site-nav__link{white-space:nowrap;padding:8px 12px;border-left:0;border-bottom:3px solid transparent;font-size:14px}
  .site-nav__link:hover{transform:none;border-left-color:transparent;border-bottom-color:var(--warm)}
  .site-nav__link[aria-current="page"]{border-left-color:transparent;border-bottom-color:var(--sun)}
  .nav-toggle{display:none}
  .rail__status{display:none}
  .rail-meter{top:auto;bottom:0;left:0;right:0;width:auto;height:3px}
  .rail-meter__fill{transform:scaleX(var(--scroll-progress));transform-origin:left center}
  .footer__grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}

@media (max-width:767px){
  body{font-size:16px}
  .site-header{
    position:sticky;top:0;left:auto;right:auto;bottom:auto;
    width:auto;height:auto;
    border-right:0;border-bottom:2px solid var(--harbor);
  }
  .rail{flex-direction:row;flex-wrap:wrap;align-items:center;gap:10px 12px;padding:10px 16px;height:auto;overflow:visible}
  .rail__brand{order:1;border-bottom:0;padding-bottom:0;gap:10px}
  .rail__mark{width:34px;height:34px;box-shadow:3px 3px 0 rgba(0,0,0,.32)}
  .rail__mark::before{inset:6px}
  .rail__mark::after{left:6px;right:6px}
  .rail__title{font-size:16px}
  .rail__sub{font-size:9.5px;letter-spacing:.06em}
  .rail__hint{display:none}
  .nav-toggle{display:inline-flex;order:2;margin-left:auto}
  .rail__actions{order:3;flex-basis:100%;display:flex;gap:8px;margin-top:0;padding-top:0;overflow-x:auto;scrollbar-width:none}
  .rail__actions::-webkit-scrollbar{display:none}
  .rail__actions .btn{flex:0 0 auto;padding:9px 14px;font-size:13px}
  .site-nav{order:4;display:none;flex-basis:100%;margin-top:4px;padding-top:10px;border-top:1px solid rgba(246,241,231,.2)}
  .site-header[data-open] .site-nav{display:block}
  .site-nav__list{flex-direction:column;gap:2px}
  .site-nav__link{padding:11px 10px;font-size:15px}
  .rail__status{display:none}
  .rail-meter{top:auto;bottom:0;left:0;right:0;width:auto;height:3px}
  .rail-meter__fill{transform:scaleX(var(--scroll-progress));transform-origin:left center}
  .footer__grid{grid-template-columns:minmax(0,1fr)}
  .footer__legal{flex-direction:column;align-items:flex-start}
  .display--xl{font-size:clamp(2.4rem,11vw,3.4rem)}
}

/* ---------- 减弱动效 ---------- */
@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-reveal [data-reveal]{opacity:1;transform:none}
}