/* ==========================================================================
   加拿大预测网 · /assets/site.css
   共享外壳：框架导航 / 纸墨体系 / Bento 基础件
   ========================================================================== */

/* ---------- 1. 设计令牌 ---------- */
:root{
  --maple:#C8102E;
  --maple-deep:#A00C24;
  --pine:#0B3D2E;
  --pine-deep:#072A20;
  --sand:#F4E9D8;
  --paper:#FBF7EF;
  --ink:#14181C;
  --ice:#8FB8DE;
  --ice-deep:#2E6B9E;
  --mist:#D9E4E8;
  --amber:#D98E04;
  --slate:#4B5563;
  --white:#FFFFFF;

  --rail-w:64px;
  --shell-w:1400px;
  --gutter:clamp(18px,4vw,48px);
  --head-h:132px;

  --font-display:'Oswald','Barlow Condensed','Arial Narrow',system-ui,sans-serif;
  --font-body:'Noto Sans SC','Source Han Sans SC','PingFang SC','Microsoft YaHei',system-ui,sans-serif;
  --font-mono:'IBM Plex Mono','JetBrains Mono','SFMono-Regular',Consolas,monospace;

  --r-s:6px;
  --r-l:18px;

  --ease:cubic-bezier(.2,.7,.3,1);
  --shadow-soft:0 18px 40px -26px rgba(20,24,28,.55);
}

/* ---------- 2. Reset ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:calc(var(--head-h) + 12px);
}
body,h1,h2,h3,h4,h5,p,ul,ol,figure,blockquote,dl,dd{margin:0;}
ul,ol{padding:0;list-style:none;}
a{color:inherit;text-decoration:none;}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer;}
img,picture,svg,video{display:block;max-width:100%;}
table{border-collapse:collapse;width:100%;}

:where(a,button,input,select,textarea,summary,[tabindex]):focus-visible{
  outline:2px solid var(--ice);
  outline-offset:3px;
  border-radius:2px;
}
.site-footer :where(a,button):focus-visible{outline-color:var(--amber);}

/* ---------- 3. 中文排版与页面底 ---------- */
body{
  font-family:var(--font-body);
  font-size:16.5px;
  line-height:1.85;
  color:var(--ink);
  background-color:var(--sand);
  background-image:
    radial-gradient(120% 90% at 12% 4%, rgba(251,247,239,.92) 0%, rgba(244,233,216,0) 58%),
    radial-gradient(90% 70% at 92% 96%, rgba(217,228,232,.55) 0%, rgba(244,233,216,0) 62%),
    repeating-linear-gradient(0deg, rgba(20,24,28,.026) 0 1px, rgba(244,233,216,0) 1px 4px);
  background-attachment:fixed;
  min-height:100vh;
}
h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:600;
  line-height:1.14;
  letter-spacing:.005em;
  color:var(--ink);
}
h1{font-size:clamp(38px,6.4vw,76px);line-height:1;}
h2{font-size:clamp(28px,3.6vw,44px);}
h3{font-size:clamp(20px,2.2vw,26px);}
p{max-width:72ch;}
.mono,.is-mono{font-family:var(--font-mono);font-size:12.5px;letter-spacing:.06em;}
.display{
  font-family:var(--font-display);
  font-weight:600;
  font-size:clamp(38px,6.4vw,76px);
  line-height:1;
  letter-spacing:.004em;
}
.lede{font-size:clamp(16px,1.6vw,19px);line-height:1.85;color:var(--slate);max-width:46ch;}
.prose{max-width:68ch;font-size:16.5px;line-height:1.85;}
.prose > * + *{margin-top:1em;}
.prose h2{margin-top:1.7em;font-size:clamp(26px,3vw,36px);}
.prose h3{margin-top:1.4em;}
.prose ul,.prose ol{padding-left:1.2em;list-style:disc;}
.prose li{margin-top:.4em;}
.prose table{font-size:14.5px;}
.prose th,.prose td{border-bottom:1px solid rgba(20,24,28,.12);padding:10px 12px;text-align:left;}

#main-content{display:block;}
#main-content:focus{outline:none;}

/* ---------- 4. 布局基础件 ---------- */
.container{
  width:100%;
  max-width:var(--shell-w);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.section{padding-block:clamp(44px,7vw,96px);}
.section--tight{padding-block:clamp(28px,4vw,54px);}

.grid-12{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:clamp(14px,2vw,28px);
}
@media (max-width:899px){
  .grid-12{grid-template-columns:repeat(6,minmax(0,1fr));}
}
@media (max-width:599px){
  .grid-12{grid-template-columns:minmax(0,1fr);}
}

[data-section]{scroll-margin-top:calc(var(--head-h) + 16px);}

/* ---------- 5. 按钮与标签 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:11px 20px;
  font-family:var(--font-body);
  font-size:14.5px;
  font-weight:600;
  letter-spacing:.05em;
  line-height:1.3;
  border:1px solid transparent;
  border-radius:var(--r-s);
  white-space:nowrap;
  transition:background-color .18s var(--ease),color .18s var(--ease),
             border-color .18s var(--ease),transform .18s var(--ease);
}
.btn:hover{transform:translateY(-1px);}
.btn--accent{background:var(--maple);color:var(--white);border-color:var(--maple);}
.btn--accent:hover{background:var(--maple-deep);border-color:var(--maple-deep);}
.btn--ghost{background:transparent;color:var(--paper);border-color:rgba(251,247,239,.45);}
.btn--ghost:hover{background:rgba(251,247,239,.12);border-color:var(--paper);}
.btn--solid{background:var(--pine);color:var(--paper);border-color:var(--pine);}
.btn--solid:hover{background:var(--pine-deep);border-color:var(--pine-deep);}
.btn--sm{font-size:13px;padding:8px 14px;letter-spacing:.04em;}

.kicker{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--maple);
}
.kicker::before{content:"";width:26px;height:2px;background:currentColor;}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 9px;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.08em;
  line-height:1.5;
  border:1px solid currentColor;
  border-radius:var(--r-s);
  color:var(--pine);
}
.tag--accent{color:var(--maple);}
.tag--muted{color:var(--slate);border-color:rgba(75,85,99,.4);}

/* ---------- 6. 面包屑 ---------- */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--slate);
}
.breadcrumb a{
  color:var(--pine);
  border-bottom:1px solid rgba(11,61,46,.28);
  transition:color .16s var(--ease),border-color .16s var(--ease);
}
.breadcrumb a:hover{color:var(--maple);border-color:var(--maple);}
.breadcrumb__sep{color:var(--slate);opacity:.55;}

/* ---------- 7. 图片容器基础规则 ---------- */
.media-frame{
  position:relative;
  overflow:hidden;
  display:block;
  width:100%;
  aspect-ratio:16 / 10;
  border-radius:var(--r-l);
  border:1px solid rgba(20,24,28,.12);
  background-color:var(--pine);
  background-image:
    linear-gradient(rgba(244,233,216,.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(244,233,216,.07) 1px, transparent 1px),
    radial-gradient(120% 110% at 15% 10%, rgba(200,16,46,.35), rgba(11,61,46,.9) 70%);
  background-size:40px 40px,40px 40px,cover;
}
.media-frame > img,
.media-frame > picture,
.media-frame > picture > img,
.media-frame > svg,
.media-frame > video{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background-image:repeating-linear-gradient(45deg,rgba(251,247,239,.055) 0 1px,transparent 1px 3px);
  mix-blend-mode:soft-light;
}
.media-frame--wide{aspect-ratio:21 / 9;}
.media-frame--tall{aspect-ratio:4 / 5;}
.media-frame--square{aspect-ratio:1 / 1;}
.media-frame__caption{
  position:absolute;
  left:0;right:0;bottom:0;
  z-index:1;
  padding:14px 16px 12px;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.06em;
  color:var(--paper);
  background:linear-gradient(transparent,rgba(11,61,46,.88));
}

/* ---------- 8. 跳转链接 ---------- */
.skip-link{
  position:absolute;
  left:14px;
  top:-140px;
  z-index:400;
  padding:10px 18px;
  background:var(--paper);
  color:var(--pine);
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.08em;
  border:2px solid var(--maple);
  border-radius:var(--r-s);
  transition:top .2s var(--ease);
}
.skip-link:focus{top:12px;}

/* ---------- 9. 左侧框架坐标轨（桌面） ---------- */
.frame-rail{display:none;}
.frame-rail__text{
  writing-mode:vertical-rl;
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.34em;
  text-transform:uppercase;
  color:rgba(244,233,216,.46);
}
@media (min-width:1080px){
  body{padding-left:var(--rail-w);}
  .frame-rail{
    position:fixed;
    inset:0 auto 0 0;
    z-index:90;
    display:flex;
    align-items:flex-end;
    justify-content:center;
    width:var(--rail-w);
    padding-bottom:30px;
    background:var(--pine-deep);
    border-right:1px solid rgba(244,233,216,.16);
    box-shadow:inset -3px 0 0 0 rgba(200,16,46,.9);
    pointer-events:none;
  }
}

/* ---------- 10. 页头 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:120;
  background:var(--pine);
  color:var(--sand);
  border-bottom:1px solid rgba(244,233,216,.16);
}
.site-header__inner{
  max-width:var(--shell-w);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.site-header__top{
  display:flex;
  align-items:center;
  gap:clamp(14px,2.4vw,34px);
  min-height:72px;
  padding-block:13px;
  border-bottom:1px dashed rgba(244,233,216,.2);
}

/* 品牌 */
.brand{
  display:flex;
  align-items:center;
  gap:12px;
  flex:0 0 auto;
}
.brand__mark{
  display:grid;
  place-items:center;
  width:40px;
  height:40px;
  flex:0 0 auto;
  background:var(--maple);
  color:var(--white);
  font-family:var(--font-display);
  font-weight:800;
  font-size:18px;
  line-height:1;
  letter-spacing:.03em;
  clip-path:polygon(0 0,100% 0,100% 72%,72% 100%,0 100%);
}
.brand__text{display:flex;flex-direction:column;gap:1px;}
.brand__name{
  font-family:var(--font-body);
  font-size:17px;
  font-weight:700;
  letter-spacing:.07em;
  line-height:1.3;
  color:var(--paper);
}
.brand__tag{
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.16em;
  text-transform:uppercase;
  line-height:1.4;
  color:var(--ice);
}

/* 状态面板 */
.site-header__status{
  display:flex;
  align-items:center;
  gap:9px;
  padding:5px 12px;
  border:1px solid rgba(244,233,216,.22);
  border-radius:var(--r-s);
  background:rgba(251,247,239,.05);
  max-width:none;
}
.site-header__dot{
  width:7px;
  height:7px;
  border-radius:50%;
  background:var(--amber);
  flex:0 0 auto;
  animation:dotPulse 2.6s var(--ease) infinite;
}
.site-header__version{
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.08em;
  white-space:nowrap;
  color:rgba(244,233,216,.9);
}
@keyframes dotPulse{
  0%,100%{box-shadow:0 0 0 0 rgba(217,142,4,.5);}
  50%{box-shadow:0 0 0 5px rgba(217,142,4,0);}
}

/* 行动区 */
.site-header__actions{
  margin-left:auto;
  display:flex;
  align-items:center;
  gap:18px;
}
.site-header__note{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.06em;
  color:rgba(244,233,216,.6);
  white-space:nowrap;
}

/* 移动导航按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  padding:9px 13px;
  margin-left:auto;
  border:1px solid rgba(244,233,216,.4);
  border-radius:var(--r-s);
  color:var(--sand);
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.14em;
  text-transform:uppercase;
  transition:background-color .16s var(--ease),border-color .16s var(--ease);
}
.nav-toggle:hover{background:rgba(251,247,239,.1);border-color:var(--paper);}
.nav-toggle__bars{
  position:relative;
  display:block;
  width:16px;
  height:2px;
  background:currentColor;
}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";
  position:absolute;
  left:0;
  width:16px;
  height:2px;
  background:currentColor;
  transition:transform .2s var(--ease);
}
.nav-toggle__bars::before{top:-5px;}
.nav-toggle__bars::after{top:5px;}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{transform:translateY(5px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{transform:translateY(-5px) rotate(-45deg);}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars{background:transparent;}

/* 主导航 */
.site-nav{padding-bottom:2px;}
.site-nav__list{
  display:flex;
  flex-wrap:wrap;
  align-items:stretch;
  column-gap:clamp(8px,1.6vw,26px);
}
.site-nav__item{flex:0 0 auto;}
.site-nav__link{
  position:relative;
  display:inline-flex;
  align-items:baseline;
  gap:8px;
  padding:11px 2px 13px;
  font-size:14.5px;
  letter-spacing:.045em;
  color:rgba(244,233,216,.78);
  transition:color .18s var(--ease);
}
.site-nav__index{
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.1em;
  color:var(--amber);
  opacity:.85;
}
.site-nav__link::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:7px;
  height:3px;
  background:var(--amber);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .24s var(--ease);
}
.site-nav__link:hover{color:var(--paper);}
.site-nav__link:hover::after{transform:scaleX(1);}
.site-nav__link[aria-current="page"]{color:var(--white);}
.site-nav__link[aria-current="page"] .site-nav__index{color:var(--white);opacity:1;}
.site-nav__link[aria-current="page"]::after{transform:scaleX(1);background:var(--maple);}
.site-nav__item--cta{display:none;}

/* 滚动进度尺 */
.scroll-meter{
  height:3px;
  background:rgba(244,233,216,.14);
  overflow:hidden;
}
.scroll-meter__bar{
  display:block;
  width:0;
  height:100%;
  background:linear-gradient(90deg,var(--maple) 0%,var(--amber) 100%);
  transition:width .12s linear;
}

/* 页头响应式 */
@media (max-width:1023px){
  .site-header__note{display:none;}
}
@media (max-width:899px){
  :root{--head-h:112px;}
  .site-header__status{display:none;}
  .site-header__actions{margin-left:auto;}
  .nav-toggle{display:inline-flex;margin-left:10px;}
  .site-nav{display:none;padding-bottom:16px;}
  .site-nav[data-open]{display:block;}
  .site-nav__list{flex-direction:column;column-gap:0;}
  .site-nav__item{width:100%;}
  .site-nav__link{
    width:100%;
    padding:13px 2px;
    font-size:15px;
    border-bottom:1px dashed rgba(244,233,216,.16);
  }
  .site-nav__link::after{display:none;}
  .site-nav__item:last-child .site-nav__link{border-bottom:0;}
  .site-nav__link[aria-current="page"]{color:var(--amber);}
  .site-nav__link[aria-current="page"] .site-nav__index{color:var(--amber);}
  .site-nav__item--cta{display:block;padding-top:16px;}
  .site-nav__item--cta .btn{width:100%;}
}
@media (max-width:520px){
  .site-header__actions{display:none;}
  .nav-toggle{margin-left:auto;}
  .brand__mark{width:36px;height:36px;font-size:16px;}
  .brand__name{font-size:15.5px;}
}
@media (max-width:389px){
  .brand__tag{display:none;}
}

/* ---------- 11. 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(40px,7vw,96px);
  background-color:var(--pine);
  background-image:
    linear-gradient(rgba(244,233,216,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(244,233,216,.05) 1px,transparent 1px),
    radial-gradient(110% 80% at 88% 0%, rgba(143,184,222,.16), rgba(11,61,46,0) 62%);
  background-size:48px 48px,48px 48px,cover;
  color:var(--sand);
  border-top:3px solid var(--maple);
}
.site-footer__inner{
  max-width:var(--shell-w);
  margin-inline:auto;
  padding:clamp(38px,6vw,74px) var(--gutter) 0;
}
.site-footer__grid{
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:clamp(28px,4vw,52px);
}
@media (min-width:640px){
  .site-footer__grid{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (min-width:1080px){
  .site-footer__grid{grid-template-columns:1.5fr .85fr .85fr 1.35fr;}
}

.brand--footer .brand__mark{width:36px;height:36px;font-size:16px;}
.site-footer__statement{
  margin-top:18px;
  max-width:34ch;
  font-size:14.5px;
  line-height:1.9;
  color:rgba(244,233,216,.78);
}
.site-footer__stamp{
  margin-top:18px;
  padding-left:12px;
  border-left:3px solid var(--amber);
  font-family:var(--font-mono);
  font-size:10.5px;
  line-height:1.6;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:rgba(244,233,216,.5);
}

.site-footer__heading{
  font-family:var(--font-mono);
  font-size:11.5px;
  font-weight:500;
  letter-spacing:.22em;
  text-transform:uppercase;
  line-height:1.6;
  color:var(--ice);
  padding-bottom:10px;
  margin-bottom:14px;
  border-bottom:1px dashed rgba(244,233,216,.22);
}
.site-footer__list{display:grid;gap:9px;}
.site-footer__list a{
  position:relative;
  display:inline-block;
  font-size:14.5px;
  color:rgba(244,233,216,.84);
  transition:color .18s var(--ease);
}
.site-footer__list a::after{
  content:"";
  position:absolute;
  left:0;bottom:-1px;
  width:100%;height:1px;
  background:var(--amber);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .22s var(--ease);
}
.site-footer__list a:hover,
.site-footer__list a:focus-visible{color:var(--white);}
.site-footer__list a:hover::after,
.site-footer__list a:focus-visible::after{transform:scaleX(1);}

.contact-list{display:grid;gap:12px;}
.contact-list__row{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:10px;
  padding-bottom:10px;
  border-bottom:1px solid rgba(244,233,216,.14);
}
.contact-list__key{
  min-width:36px;
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:rgba(244,233,216,.5);
}
.contact-list__val{
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.02em;
  line-height:1.6;
  color:var(--paper);
  word-break:break-word;
}
.contact-list__note{
  padding-left:12px;
  border-left:2px solid rgba(143,184,222,.5);
  font-size:12.5px;
  line-height:1.8;
  color:rgba(244,233,216,.58);
}
.copy-btn{
  margin-left:auto;
  padding:3px 9px;
  border:1px solid rgba(143,184,222,.45);
  border-radius:var(--r-s);
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.12em;
  line-height:1.7;
  color:var(--ice);
  transition:background-color .16s var(--ease),color .16s var(--ease),border-color .16s var(--ease);
}
.copy-btn:hover{background:rgba(143,184,222,.16);color:var(--paper);}
.copy-btn[data-copied]{
  background:var(--amber);
  border-color:var(--amber);
  color:var(--ink);
}

.site-footer__bottom{
  margin-top:clamp(30px,4.5vw,56px);
  padding-block:18px 28px;
  border-top:1px solid rgba(244,233,216,.18);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px 26px;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.06em;
  color:rgba(244,233,216,.58);
}
.site-footer__copy{max-width:none;}
.site-footer__legal{display:flex;flex-wrap:wrap;gap:16px;}
.site-footer__legal a{
  color:rgba(244,233,216,.72);
  border-bottom:1px solid rgba(244,233,216,.28);
  transition:color .16s var(--ease),border-color .16s var(--ease);
}
.site-footer__legal a:hover{color:var(--paper);border-color:var(--amber);}
.site-footer__icp{max-width:none;}

/* 返回顶部 */
.back-to-top{
  position:fixed;
  right:clamp(16px,3vw,30px);
  bottom:clamp(16px,3vw,30px);
  z-index:130;
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:10px 16px;
  background:var(--paper);
  color:var(--pine);
  border:1px solid var(--pine);
  border-radius:var(--r-s);
  box-shadow:var(--shadow-soft);
  font-size:13px;
  font-weight:600;
  letter-spacing:.06em;
  opacity:0;
  visibility:hidden;
  transform:translateY(12px);
  transition:opacity .24s var(--ease),transform .24s var(--ease),
             visibility .24s var(--ease),background-color .18s var(--ease),color .18s var(--ease);
}
.back-to-top[data-visible]{opacity:1;visibility:visible;transform:translateY(0);}
.back-to-top:hover{background:var(--pine);color:var(--paper);}
.back-to-top__icon{font-family:var(--font-mono);font-size:13px;line-height:1;}

/* ---------- 12. 入场显现协议 ---------- */
html.js-reveal [data-reveal]{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .5s var(--ease),transform .5s var(--ease);
}
html.js-reveal [data-reveal][data-revealed]{
  opacity:1;
  transform:none;
}

/* ---------- 13. 打印 ---------- */
@media print{
  .site-header,.site-footer,.frame-rail,.back-to-top,.scroll-meter,.skip-link{display:none !important;}
  body{background:#fff;padding-left:0;color:#000;font-size:12pt;}
  a{color:#000;text-decoration:underline;}
}

/* ---------- 14. 减弱动态 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .site-header__dot{animation:none;}
  .btn:hover{transform:none;}
  .back-to-top{transform:none;}
  html.js-reveal [data-reveal]{opacity:1;transform:none;}
}