/* ==========================================================================
   贝博官网 · Site Kit 共享样式 / assets/site.css
   深海蓝轨道 + 暖纸白画布 + 信号橙 / 青瓷绿
   ========================================================================== */

/* ---------- 变量 ---------- */
:root{
  --ink-900:#061320;
  --ink-800:#0B1B2B;
  --ink-700:#14293C;
  --paper-100:#F6F3EC;
  --paper-200:#E6E1D5;
  --gray-500:#6E6A5F;
  --orange-500:#FF6A2B;
  --orange-700:#C2410C;
  --celadon-400:#57C4A8;
  --celadon-700:#14705C;
  --white:#FFFFFF;

  --rail-w:88px;
  --topbar-h:64px;
  --hair:rgba(6,19,32,.12);
  --hair-dark:rgba(246,243,236,.14);

  --font:"Inter","Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{
  -webkit-text-size-adjust:100%;
  text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-block-start:24px;
  overflow-x:hidden;
}
body,h1,h2,h3,h4,h5,h6,p,figure,blockquote,dl,dd{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
img,svg,video{display:block;max-width:100%;}
button,input,select,textarea{font:inherit;color:inherit;background:none;border:0;}
button{cursor:pointer;}
a{color:inherit;text-decoration:none;}
table{border-collapse:collapse;width:100%;}
:focus-visible{outline:2px solid var(--celadon-400);outline-offset:3px;}

/* ---------- 基础排版 ---------- */
body{
  font-family:var(--font);
  font-size:17px;
  line-height:1.65;
  color:var(--ink-900);
  background:var(--paper-100);
  padding-inline-start:var(--rail-w);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
strong,b{font-weight:800;}
::selection{background:var(--orange-500);color:#08131f;}

.h1,.h2,.h3,.h4{font-weight:800;letter-spacing:-.02em;}
.h1{font-size:clamp(44px,8.6vw,132px);line-height:.94;}
.h2{font-size:clamp(28px,3.4vw,48px);line-height:1.04;}
.h3{font-size:clamp(20px,2vw,26px);line-height:1.22;letter-spacing:-.01em;}
.h4{font-size:17px;line-height:1.4;letter-spacing:0;}
.lead{
  max-width:62ch;
  font-size:clamp(17px,1.35vw,20px);
  line-height:1.7;
  color:var(--gray-500);
}
.label{
  display:inline-block;
  font-size:13px;
  font-weight:700;
  letter-spacing:.06em;
  color:var(--gray-500);
}
.label--accent{color:var(--orange-700);}
.num{font-variant-numeric:tabular-nums;font-weight:800;letter-spacing:-.01em;}
.prose{font-size:17px;line-height:1.75;}
.prose p{margin-block:0 1.15em;max-width:68ch;}
.prose p:last-child{margin-block-end:0;}
.prose a{color:var(--orange-700);border-block-end:1px solid rgba(194,65,12,.32);}
.prose a:hover{border-block-end-color:var(--orange-700);}
.prose ul,.prose ol{margin-block:0 1.15em;padding-inline-start:1.2em;list-style:disc;}
.prose li{margin-block-end:.4em;}

/* ---------- 跳过链接 ---------- */
.skip-link{
  position:fixed;
  inset-block-start:0;
  inset-inline-start:0;
  z-index:300;
  padding:12px 18px;
  background:var(--paper-100);
  color:var(--ink-900);
  font-size:14px;
  font-weight:700;
  letter-spacing:.04em;
  transform:translateY(-130%);
  transition:transform .18s var(--ease);
}
.skip-link:focus,
.skip-link:focus-visible{transform:translateY(0);}

/* ==========================================================================
   头部：左侧固定轨道
   ========================================================================== */
.site-rail{
  position:fixed;
  inset-block:0;
  inset-inline-start:0;
  z-index:80;
  width:var(--rail-w);
  display:flex;
  flex-direction:column;
  align-items:center;
  padding:14px 0 18px;
  background:var(--ink-800);
  background-image:linear-gradient(180deg,rgba(87,196,168,.10),rgba(87,196,168,0) 46%);
  border-inline-end:1px solid rgba(87,196,168,.18);
  overflow-y:auto;
  overscroll-behavior:contain;
  scrollbar-width:none;
}
.site-rail::-webkit-scrollbar{width:0;height:0;}

/* --- 品牌 --- */
.rail-brand{
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:10px;
  width:calc(100% - 24px);
  padding-block:4px 14px;
  margin-block-end:14px;
  border-block-end:1px solid rgba(246,243,236,.12);
}
.rail-brand__mark{
  display:grid;
  place-items:center;
  width:34px;
  height:34px;
  background:var(--orange-500);
  color:#08131f;
  font-size:17px;
  font-weight:800;
  line-height:1;
  letter-spacing:0;
}
.rail-brand__text{
  writing-mode:vertical-rl;
  font-size:12px;
  font-weight:700;
  letter-spacing:.16em;
  line-height:1;
  color:rgba(246,243,236,.82);
  transition:color .18s var(--ease);
}
.rail-brand:hover .rail-brand__text{color:var(--celadon-400);}

/* --- 导航 --- */
.rail-nav{width:100%;padding-inline:6px;}
.rail-nav__list{display:flex;flex-direction:column;align-items:stretch;gap:2px;}
.rail-nav__link{
  position:relative;
  display:flex;
  align-items:center;
  justify-content:center;
  width:100%;
  padding:9px 0;
  writing-mode:vertical-rl;
  font-size:12.5px;
  font-weight:600;
  letter-spacing:.14em;
  line-height:1.15;
  color:rgba(246,243,236,.6);
  transition:color .18s var(--ease);
}
.rail-nav__link::before{
  content:"";
  position:absolute;
  left:2px;
  top:8px;
  bottom:8px;
  width:2px;
  background:transparent;
  transition:background-color .18s var(--ease);
}
.rail-nav__link:hover{color:var(--paper-100);}
.rail-nav__link:hover::before{background:rgba(246,243,236,.3);}
.rail-nav__link[aria-current="page"]{color:var(--orange-500);}
.rail-nav__link[aria-current="page"]::before{background:var(--orange-500);}

/* --- 轨道底部 --- */
.rail-foot{
  margin-block-start:auto;
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:10px;
  width:calc(100% - 22px);
  padding-block-start:16px;
  border-block-start:1px solid rgba(246,243,236,.12);
}
.rail-cta{
  display:flex;
  align-items:center;
  justify-content:center;
  width:100%;
  padding:13px 4px;
  writing-mode:vertical-rl;
  background:var(--orange-500);
  color:#08131f;
  font-size:12px;
  font-weight:800;
  letter-spacing:.16em;
  line-height:1.2;
  border:1px solid var(--orange-500);
  transition:background-color .18s var(--ease),color .18s var(--ease);
}
.rail-cta:hover,.rail-cta:focus-visible{background:transparent;color:var(--orange-500);}
.rail-sub{
  writing-mode:vertical-rl;
  font-size:11.5px;
  letter-spacing:.16em;
  line-height:1.2;
  color:rgba(246,243,236,.55);
  transition:color .18s var(--ease);
}
.rail-sub:hover,.rail-sub:focus-visible{color:var(--celadon-400);}

/* --- 菜单按钮（桌面隐藏） --- */
.nav-toggle{
  display:none;
  align-items:center;
  justify-content:center;
  width:38px;
  height:38px;
  border:1px solid rgba(246,243,236,.22);
  color:var(--paper-100);
  transition:border-color .18s var(--ease),background-color .18s var(--ease);
}
.nav-toggle:hover{border-color:var(--orange-500);}
.nav-toggle__bars{display:flex;flex-direction:column;gap:4px;}
.nav-toggle__bars i{
  display:block;
  width:16px;
  height:1.5px;
  background:currentColor;
  transition:transform .2s var(--ease),opacity .2s var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(1){transform:translateY(5.5px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(3){transform:translateY(-5.5px) rotate(-45deg);}
.nav-toggle__label{
  position:absolute;
  width:1px;
  height:1px;
  padding:0;
  margin:-1px;
  overflow:hidden;
  clip-path:inset(50%);
  white-space:nowrap;
}

/* --- 阅读进度 --- */
.scroll-progress{
  position:fixed;
  inset-block-start:0;
  inset-inline-start:var(--rail-w);
  inset-inline-end:0;
  height:2px;
  z-index:90;
  pointer-events:none;
}
.scroll-progress__bar{
  display:block;
  width:100%;
  height:100%;
  background:linear-gradient(90deg,var(--orange-500),var(--celadon-400));
  transform:scaleX(0);
  transform-origin:0 50%;
}

/* --- 返回顶部 --- */
.to-top{
  position:fixed;
  inset-inline-end:clamp(16px,3vw,36px);
  inset-block-end:clamp(16px,3vw,32px);
  z-index:100;
  display:grid;
  place-items:center;
  width:46px;
  height:46px;
  background:var(--ink-800);
  color:var(--orange-500);
  border:1px solid rgba(255,106,43,.5);
  transition:background-color .18s var(--ease),color .18s var(--ease);
}
.to-top:hover,.to-top:focus-visible{background:var(--orange-500);color:#08131f;}
.to-top[hidden]{display:none;}
.to-top__arrow{
  width:10px;
  height:10px;
  border-inline-start:2px solid currentColor;
  border-block-start:2px solid currentColor;
  transform:rotate(45deg) translate(1px,1px);
}

/* ==========================================================================
   页脚
   ========================================================================== */
.site-foot{
  position:relative;
  background:var(--ink-900);
  color:rgba(246,243,236,.7);
  border-block-start:1px solid rgba(255,106,43,.3);
  padding-block:clamp(48px,6.5vw,84px) 26px;
  overflow:hidden;
}
.site-foot::before{
  content:"";
  position:absolute;
  inset:0;
  z-index:0;
  pointer-events:none;
  background-image:
    linear-gradient(rgba(246,243,236,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(246,243,236,.05) 1px,transparent 1px);
  background-size:72px 72px;
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.85),transparent 72%);
  mask-image:linear-gradient(180deg,rgba(0,0,0,.85),transparent 72%);
}
.foot-inner{
  position:relative;
  z-index:1;
  width:100%;
  max-width:1360px;
  margin-inline:auto;
  padding-inline:clamp(20px,4.4vw,64px);
}
.foot-top{
  display:grid;
  grid-template-columns:minmax(230px,1.45fr) repeat(4,minmax(0,1fr));
  gap:clamp(24px,3vw,46px);
}

.foot-brand{max-width:290px;}
.foot-brand__name{
  display:inline-block;
  font-size:23px;
  font-weight:800;
  letter-spacing:.02em;
  line-height:1.2;
  color:var(--paper-100);
  transition:color .18s var(--ease);
}
.foot-brand__name:hover{color:var(--orange-500);}
.foot-brand__line{
  margin-block-start:8px;
  font-size:14px;
  letter-spacing:.05em;
  color:rgba(246,243,236,.5);
}
.foot-brand__tel{
  margin-block-start:22px;
  font-size:26px;
  font-weight:800;
  line-height:1.1;
  letter-spacing:.02em;
  color:var(--orange-500);
  font-variant-numeric:tabular-nums;
}
.foot-brand__note{
  margin-block-start:6px;
  font-size:12.5px;
  letter-spacing:.04em;
  color:rgba(246,243,236,.42);
}
.foot-brand__text{
  margin-block-start:14px;
  font-size:13.5px;
  line-height:1.6;
  color:rgba(246,243,236,.62);
  word-break:break-all;
}
.foot-brand__text--addr{word-break:normal;}

.foot-col__title{
  display:flex;
  align-items:baseline;
  gap:9px;
  margin-block-end:14px;
  padding-block-end:11px;
  border-block-end:1px solid rgba(246,243,236,.14);
  font-size:13px;
  font-weight:700;
  letter-spacing:.09em;
  line-height:1.3;
  color:var(--paper-100);
}
.foot-col__num{
  font-size:11px;
  font-weight:700;
  letter-spacing:.06em;
  color:var(--celadon-400);
  font-variant-numeric:tabular-nums;
}
.foot-col__list{display:flex;flex-direction:column;gap:9px;}
.foot-col__list a{
  display:inline-block;
  font-size:14.5px;
  line-height:1.45;
  color:rgba(246,243,236,.66);
  transition:color .16s var(--ease),padding-inline-start .16s var(--ease);
}
.foot-col__list a:hover,
.foot-col__list a:focus-visible{color:var(--celadon-400);padding-inline-start:5px;}
.foot-col__item{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:14.5px;
  line-height:1.45;
  color:rgba(246,243,236,.66);
}
.foot-col__item::before{
  content:"";
  flex:0 0 auto;
  width:4px;
  height:4px;
  background:rgba(87,196,168,.65);
}

.foot-legal{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:12px 26px;
  margin-block-start:clamp(36px,5vw,64px);
  padding-block-start:22px;
  border-block-start:1px solid rgba(246,243,236,.13);
  font-size:12.5px;
  letter-spacing:.04em;
  color:rgba(246,243,236,.45);
}
.foot-legal__icp{font-variant-numeric:tabular-nums;}
.foot-legal__links{display:flex;flex-wrap:wrap;gap:16px;margin-inline-start:auto;}
.foot-legal__links a{
  color:rgba(246,243,236,.62);
  transition:color .16s var(--ease);
}
.foot-legal__links a:hover,
.foot-legal__links a:focus-visible{color:var(--orange-500);}

/* ==========================================================================
   通用组件
   ========================================================================== */
.wrap{
  width:100%;
  max-width:1360px;
  margin-inline:auto;
  padding-inline:clamp(20px,4.4vw,64px);
}
.wrap--wide{max-width:1480px;}

.section{padding-block:clamp(56px,7vw,112px);}
.section--tight{padding-block:clamp(36px,4.4vw,64px);}
.section--paper{background:var(--paper-100);}
.section--paper2{background:var(--paper-200);}
.section--ink{background:var(--ink-900);color:rgba(246,243,236,.8);}
.section--ink :is(h1,h2,h3,h4){color:var(--paper-100);}
.section--ink .lead{color:rgba(246,243,236,.62);}
.section--ink .label{color:rgba(246,243,236,.55);}

.rule{border:0;height:1px;background:var(--hair);margin:0;}
.rule--dark{background:var(--hair-dark);}

/* 按钮 */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  padding:14px 24px;
  font-size:15px;
  font-weight:700;
  letter-spacing:.03em;
  line-height:1.2;
  background:var(--orange-500);
  color:#08131f;
  border:1px solid var(--orange-500);
  transition:background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.btn:hover,.btn:focus-visible{background:#E2541A;border-color:#E2541A;color:#08131f;}
.btn--ghost{background:transparent;color:var(--ink-900);border-color:rgba(6,19,32,.25);}
.btn--ghost:hover,.btn--ghost:focus-visible{background:var(--ink-900);border-color:var(--ink-900);color:var(--paper-100);}
.btn--light{background:var(--paper-100);color:var(--ink-900);border-color:var(--paper-100);}
.btn--light:hover,.btn--light:focus-visible{background:transparent;border-color:var(--paper-100);color:var(--paper-100);}
.btn--sm{padding:10px 16px;font-size:13.5px;}

/* 标签 */
.tag{
  display:inline-flex;
  align-items:center;
  gap:7px;
  padding:5px 10px;
  font-size:12.5px;
  font-weight:700;
  letter-spacing:.05em;
  line-height:1.3;
  border:1px solid rgba(6,19,32,.16);
  color:var(--ink-900);
}
.tag--ok{border-color:rgba(20,112,92,.35);background:rgba(87,196,168,.12);color:var(--celadon-700);}
.tag--warn{border-color:rgba(194,65,12,.32);background:rgba(255,106,43,.1);color:var(--orange-700);}

/* 面包屑 */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:13px;
  letter-spacing:.05em;
  color:var(--gray-500);
}
.breadcrumb a{color:var(--orange-700);}
.breadcrumb a:hover{border-block-end:1px solid currentColor;}
.breadcrumb__sep{color:rgba(110,106,95,.6);}
.breadcrumb [aria-current="page"]{color:var(--ink-900);font-weight:700;}

/* 栅格 */
.grid{display:grid;gap:clamp(16px,2vw,24px);}
.grid--12{grid-template-columns:repeat(12,minmax(0,1fr));}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr));}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr));}

/* 发丝线面板 */
.panel{border-block-start:1px solid var(--hair);padding-block-start:clamp(16px,2vw,24px);}
.panel--dark{border-block-start-color:var(--hair-dark);}

/* 数据条带 */
.databar{
  display:flex;
  flex-wrap:wrap;
  gap:clamp(16px,3vw,44px);
  padding-block:18px;
  border-block:1px solid var(--hair);
}
.databar--dark{border-block-color:var(--hair-dark);}

/* 图片容器基础规则 */
.media{
  position:relative;
  display:block;
  width:100%;
  overflow:hidden;
  background:var(--ink-800);
  aspect-ratio:16/10;
}
.media > img,
.media > picture > img,
.media > svg{
  display:block;
  width:100%;
  height:100%;
  object-fit:cover;
}
.media--wide{aspect-ratio:21/9;}
.media--4x3{aspect-ratio:4/3;}
.media--square{aspect-ratio:1/1;}
.media--tall{aspect-ratio:3/4;}
.media::after{
  content:"";
  position:absolute;
  inset:0;
  border:1px solid rgba(6,19,32,.14);
  pointer-events:none;
}
.media--grid::before{
  content:"";
  position:absolute;
  inset:0;
  z-index:1;
  pointer-events:none;
  background-image:
    linear-gradient(rgba(246,243,236,.10) 1px,transparent 1px),
    linear-gradient(90deg,rgba(246,243,236,.10) 1px,transparent 1px);
  background-size:56px 56px;
  mix-blend-mode:overlay;
}
.media__caption{
  display:block;
  margin-block-start:10px;
  font-size:13px;
  letter-spacing:.03em;
  color:var(--gray-500);
}

/* 工具类 */
.visually-hidden{
  position:absolute;
  width:1px;
  height:1px;
  padding:0;
  margin:-1px;
  overflow:hidden;
  clip-path:inset(50%);
  white-space:nowrap;
  border:0;
}

/* 进场 */
html[data-js] [data-reveal]{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .32s var(--ease),transform .32s var(--ease);
}
html[data-js] [data-reveal].is-in{opacity:1;transform:none;}

/* ==========================================================================
   响应式
   ========================================================================== */
@media (max-width:1100px){
  .foot-top{grid-template-columns:repeat(2,minmax(0,1fr));}
  .foot-brand{grid-column:1 / -1;max-width:none;}
}

@media (max-width:900px){
  body{
    padding-inline-start:0;
    padding-block-start:var(--topbar-h);
    font-size:16.5px;
  }
  body.is-nav-open{overflow:hidden;}

  .site-rail{
    inset-block-start:0;
    inset-block-end:auto;
    width:100%;
    height:var(--topbar-h);
    flex-direction:row;
    align-items:center;
    gap:10px;
    padding:0 14px;
    overflow:visible;
    border-inline-end:0;
    border-block-end:1px solid rgba(87,196,168,.22);
    background-image:linear-gradient(90deg,rgba(87,196,168,.12),rgba(87,196,168,0) 55%);
  }

  .rail-brand{
    order:1;
    flex-direction:row;
    align-items:center;
    gap:9px;
    width:auto;
    margin:0;
    padding:0;
    border:0;
  }
  .rail-brand__mark{width:30px;height:30px;font-size:15px;}
  .rail-brand__text{
    writing-mode:horizontal-tb;
    font-size:14px;
    font-weight:800;
    letter-spacing:.1em;
    color:var(--paper-100);
  }

  .nav-toggle{order:3;display:flex;flex:0 0 auto;}

  .rail-foot{
    order:2;
    margin-inline-start:auto;
    margin-block-start:0;
    flex-direction:row;
    align-items:center;
    gap:10px;
    width:auto;
    padding:0;
    border:0;
  }
  .rail-cta{
    writing-mode:horizontal-tb;
    width:auto;
    padding:9px 13px;
    font-size:12px;
    letter-spacing:.06em;
    white-space:nowrap;
  }
  .rail-sub{display:none;}

  .rail-nav{
    position:fixed;
    inset-block-start:var(--topbar-h);
    inset-inline:0;
    width:100%;
    padding:6px 14px 18px;
    max-height:calc(100dvh - var(--topbar-h));
    overflow-y:auto;
    background:var(--ink-800);
    border-block-end:1px solid rgba(87,196,168,.22);
    box-shadow:0 22px 40px -24px rgba(6,19,32,.85);
    opacity:0;
    visibility:hidden;
    pointer-events:none;
    transform:translateY(-8px);
    transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s linear;
  }
  .site-rail[data-open="true"] .rail-nav{
    opacity:1;
    visibility:visible;
    pointer-events:auto;
    transform:translateY(0);
  }

  .rail-nav__list{align-items:stretch;gap:0;}
  .rail-nav__link{
    writing-mode:horizontal-tb;
    justify-content:flex-start;
    padding:15px 6px;
    font-size:15px;
    letter-spacing:.06em;
    border-block-end:1px solid rgba(246,243,236,.09);
  }
  .rail-nav__link::before{left:0;top:12px;bottom:12px;width:3px;}
  .rail-nav__list li:last-child .rail-nav__link{border-block-end:0;}

  .scroll-progress{
    inset-inline-start:0;
    inset-block-start:var(--topbar-h);
  }

  .grid--3,.grid--2{grid-template-columns:1fr;}
  html{scroll-padding-block-start:calc(var(--topbar-h) + 16px);}
}

@media (max-width:560px){
  .foot-top{grid-template-columns:1fr;gap:28px;}
  .foot-legal{flex-direction:column;align-items:flex-start;gap:10px;}
  .foot-legal__links{margin-inline-start:0;}
  .rail-brand__text{font-size:13px;letter-spacing:.06em;}
  .rail-cta{padding:8px 10px;font-size:11.5px;}
}

/* ==========================================================================
   降低动效
   ========================================================================== */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    transition-delay:0ms !important;
  }
  html[data-js] [data-reveal]{opacity:1 !important;transform:none !important;}
  .rail-nav__link:hover,
  .foot-col__list a:hover{padding-inline-start:0;}
}