/* ============================================================
   快盈3 · 共享样式表 /assets/site.css
   令牌 → 重置 → 中文排版 → 焦点动效 → 通用组件 → 头部 → 页脚 → 响应式
   ============================================================ */

/* ---------- 0. 设计令牌 ---------- */
:root{
  --teal:#2EC4B6;
  --teal-deep:#1C9A8F;
  --teal-mist:#A8EDE4;
  --canvas:#EAF8F5;
  --orange:#FF9F1C;
  --orange-soft:#FFD79A;
  --ink:#0B3C49;
  --ink-80:#35606B;
  --paper:#FBFDFC;
  --hairline:#CFE3DF;

  --shadow-1:0 12px 28px rgba(11,60,73,.08);
  --shadow-2:0 18px 36px rgba(11,60,73,.14);

  --radius:14px;
  --radius-sm:10px;
  --notch:18px;

  --maxw:1180px;
  --gutter:clamp(16px, 4vw, 40px);

  --font-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"IBM Plex Mono","JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;
}

/* ---------- 1. 重置 ---------- */
*,*::before,*::after{ box-sizing:border-box; }
html{ -webkit-text-size-adjust:100%; }
body,h1,h2,h3,h4,h5,p,figure,blockquote,dl,dd{ margin:0; }
ul[class],ol[class]{ list-style:none; margin:0; padding:0; }
img,svg,video{ display:block; max-width:100%; }
img{ height:auto; }
button{ font:inherit; color:inherit; background:none; border:0; }
a{ color:inherit; }
table{ border-collapse:collapse; width:100%; }
hr{ border:0; }

/* ---------- 2. 中文排版 ---------- */
body{
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.7;
  color:var(--ink);
  background:var(--canvas);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}

h1,h2,h3,h4{
  font-weight:900;
  letter-spacing:-.02em;
  line-height:1.2;
  color:var(--ink);
  word-break:keep-all;
  overflow-wrap:break-word;
}
h1{ font-size:clamp(2.2rem, 5vw, 4.2rem); line-height:1.14; }
h2{ font-size:clamp(1.65rem, 3vw, 2.15rem); }
h3{ font-size:clamp(1.15rem, 1.8vw, 1.4rem); }
h4{ font-size:1.05rem; }

p{ line-height:1.7; }
small{ font-size:.82em; }

.mono{
  font-family:var(--font-mono);
  letter-spacing:.02em;
  font-size:.875em;
  font-variant-numeric:tabular-nums;
}

.lede{
  font-size:clamp(1.02rem, 1.6vw, 1.2rem);
  line-height:1.75;
  color:var(--ink-80);
  max-width:62ch;
}

::selection{ background:var(--teal-mist); color:var(--ink); }

#main-content{ scroll-margin-top:132px; }

@media (prefers-reduced-motion:no-preference){
  html{ scroll-behavior:smooth; }
}

/* ---------- 3. 焦点与动效 ---------- */
:focus-visible{
  outline:2px solid var(--orange);
  outline-offset:3px;
}

.skip-link{
  position:absolute;
  top:0;
  left:50%;
  transform:translate(-50%, -140%);
  z-index:300;
  padding:10px 20px;
  border-radius:0 0 var(--radius-sm) var(--radius-sm);
  background:var(--ink);
  color:var(--paper);
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.02em;
  text-decoration:none;
  transition:transform .18s ease-out;
}
.skip-link:focus{ transform:translate(-50%, 0); }

.visually-hidden{
  position:absolute !important;
  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;
}

.is-reveal-pending{
  opacity:0;
  transform:translateY(8px);
}
.is-reveal-pending.is-revealed{
  opacity:1;
  transform:none;
  transition:opacity .5s ease-out, transform .5s ease-out;
}

/* ---------- 4. 通用布局与组件 ---------- */
.wrap{
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding-inline:var(--gutter);
}

.page-main{ display:block; }

.section{ padding-block:clamp(48px, 7vw, 96px); }
.section--tight{ padding-block:clamp(28px, 4vw, 56px); }

.section-head{
  display:grid;
  gap:10px;
  margin-bottom:clamp(24px, 3vw, 40px);
}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--teal-deep);
}
.eyebrow::before{
  content:"";
  width:18px;
  height:1px;
  background:currentColor;
}

.rule{
  height:1px;
  background:var(--hairline);
  border:0;
  margin-block:clamp(24px, 3vw, 40px);
}

.stack > * + *{ margin-top:var(--stack, 16px); }

/* 按钮 */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 22px;
  border-radius:999px;
  border:1px solid transparent;
  font-size:15px;
  font-weight:700;
  line-height:1.4;
  text-decoration:none;
  cursor:pointer;
  transition:background-color .18s ease-out, color .18s ease-out,
             border-color .18s ease-out, box-shadow .18s ease-out,
             transform .18s ease-out;
}
.btn--primary{
  background:var(--orange);
  color:var(--ink);
  box-shadow:0 8px 20px rgba(255,159,28,.28);
}
.btn--primary:hover{
  background:#F08E08;
  transform:translateY(-2px);
  box-shadow:0 14px 26px rgba(255,159,28,.34);
}
.btn--ghost{
  background:transparent;
  color:var(--ink);
  border-color:var(--hairline);
}
.btn--ghost:hover{
  background:var(--paper);
  border-color:var(--teal);
  transform:translateY(-2px);
  box-shadow:var(--shadow-1);
}
.btn--teal{
  background:var(--teal);
  color:var(--ink);
}
.btn--teal:hover{
  background:var(--teal-deep);
  color:var(--paper);
  transform:translateY(-2px);
}
.btn:active{ transform:translateY(0); }

/* 标签与状态灯 */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 10px;
  border-radius:999px;
  background:var(--teal-mist);
  color:var(--ink);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.02em;
  line-height:1.5;
  white-space:nowrap;
}
.tag--hot{ background:var(--orange-soft); color:#4A2E00; }
.tag--ghost{ background:transparent; border:1px solid var(--hairline); color:var(--ink-80); }

.status-dot{
  display:inline-block;
  flex:none;
  width:8px;
  height:8px;
  border-radius:50%;
  background:var(--orange);
  box-shadow:0 0 0 3px rgba(255,159,28,.22);
}
.status-dot--teal{ background:var(--teal); box-shadow:0 0 0 3px rgba(46,196,182,.24); }
.status-dot--ink{ background:var(--ink-80); box-shadow:0 0 0 3px rgba(53,96,107,.22); }

/* 堆叠面板 */
.panel{
  background:var(--paper);
  border:1px solid var(--hairline);
  border-radius:var(--radius);
  padding:clamp(20px, 3vw, 32px);
}
.panel--notch{
  border:0;
  border-radius:0;
  clip-path:polygon(0 0, calc(100% - var(--notch)) 0, 100% var(--notch), 100% 100%, 0 100%);
  padding:clamp(20px, 3vw, 32px);
}
.panel--tint{ background:var(--canvas); }
.panel--teal{ background:var(--teal); color:var(--ink); border-color:transparent; }
.panel--teal h2,.panel--teal h3{ color:var(--ink); }
.panel--ink{ background:var(--ink); color:var(--teal-mist); border-color:transparent; }
.panel--ink h2,.panel--ink h3{ color:var(--paper); }
.panel--ink .eyebrow{ color:var(--teal); }

/* 面包屑 */
.breadcrumb{
  padding-block:14px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.02em;
  color:var(--ink-80);
}
.breadcrumb__list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
}
.breadcrumb__list li{
  display:flex;
  align-items:center;
  gap:8px;
}
.breadcrumb__list li + li::before{
  content:"/";
  color:var(--hairline);
}
.breadcrumb a{
  color:var(--teal-deep);
  text-decoration:none;
}
.breadcrumb a:hover{ text-decoration:underline; }

/* 网格 */
.grid{
  display:grid;
  gap:clamp(16px, 2.4vw, 28px);
}
.grid--2{ grid-template-columns:repeat(2, minmax(0,1fr)); }
.grid--3{ grid-template-columns:repeat(3, minmax(0,1fr)); }
.grid--sidebar{ grid-template-columns:minmax(0,1.62fr) minmax(0,1fr); }

/* 图片容器基础规则 */
.media-frame{
  position:relative;
  display:block;
  overflow:hidden;
  width:100%;
  aspect-ratio:16 / 10;
  border-radius:var(--radius);
  background:linear-gradient(135deg, var(--teal-mist) 0%, var(--canvas) 58%, var(--orange-soft) 100%);
  isolation:isolate;
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  z-index:1;
  background:repeating-linear-gradient(115deg, rgba(11,60,73,.055) 0 1px, transparent 1px 14px);
  pointer-events:none;
}
.media-frame > img{
  position:relative;
  z-index:0;
  width:100%;
  height:100%;
  object-fit:cover;
}
.media-frame--wide{ aspect-ratio:21 / 9; }
.media-frame--tall{ aspect-ratio:3 / 4; }
.media-frame--square{ aspect-ratio:1 / 1; }

/* ---------- 5. 头部 ---------- */
.site-head{
  position:sticky;
  top:0;
  z-index:90;
  background:var(--paper);
  border-bottom:1px solid var(--hairline);
}

/* 状态轨 */
.site-head__meta{
  background:var(--ink);
  color:var(--teal-mist);
}
.site-head__inner{
  max-width:var(--maxw);
  margin-inline:auto;
  padding:8px var(--gutter);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.02em;
}
.site-head__status{
  display:inline-flex;
  align-items:center;
  gap:9px;
  min-width:0;
}
.site-head__batch{
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}
.site-head__batch b{
  color:var(--orange);
  font-weight:700;
}
.site-head__quick{
  display:flex;
  align-items:center;
  gap:2px;
  flex:none;
}
.quick-link{
  display:inline-block;
  padding:4px 10px;
  border-radius:999px;
  color:var(--teal-mist);
  text-decoration:none;
  white-space:nowrap;
  transition:background-color .18s ease-out, color .18s ease-out;
}
.quick-link:hover,
.quick-link:focus-visible{
  background:rgba(46,196,182,.22);
  color:var(--paper);
}

/* 居中刊头 */
.masthead{
  position:relative;
  max-width:var(--maxw);
  margin-inline:auto;
  padding:20px var(--gutter) 18px;
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:12px;
  transition:padding .22s ease-out, gap .22s ease-out;
}

.brand{
  display:block;
  text-align:center;
  text-decoration:none;
  color:var(--ink);
  padding:2px 4px;
  border-radius:var(--radius-sm);
}
.brand__mark{
  display:block;
  font-size:clamp(1.75rem, 3.6vw, 2.4rem);
  font-weight:900;
  letter-spacing:-.02em;
  line-height:1.12;
  transition:font-size .22s ease-out, color .18s ease-out;
}
.brand__num{ color:var(--teal); }
.brand:hover .brand__mark{ color:var(--teal-deep); }
.brand:hover .brand__num{ color:var(--orange); }
.brand__subline{
  display:block;
  margin-top:2px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--ink-80);
  transition:opacity .18s ease-out;
}

/* 移动端栏目按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  padding:9px 14px;
  border-radius:999px;
  border:1px solid var(--hairline);
  background:var(--paper);
  color:var(--ink);
  font-size:14px;
  font-weight:700;
  line-height:1;
  cursor:pointer;
  transition:background-color .18s ease-out, border-color .18s ease-out;
}
.nav-toggle:hover{ background:var(--canvas); border-color:var(--teal); }
.nav-toggle__label{ font-family:var(--font-mono); font-size:13px; letter-spacing:.02em; }
.nav-toggle__icon{
  position:relative;
  display:block;
  width:18px;
  height:2px;
  background:currentColor;
  border-radius:2px;
}
.nav-toggle__icon::before,
.nav-toggle__icon::after{
  content:"";
  position:absolute;
  left:0;
  width:18px;
  height:2px;
  background:currentColor;
  border-radius:2px;
  transition:transform .18s ease-out;
}
.nav-toggle__icon::before{ top:-6px; }
.nav-toggle__icon::after{ top:6px; }
.nav-toggle[aria-expanded="true"] .nav-toggle__icon{ background:transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle__icon::before{ transform:translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__icon::after{ transform:translateY(-6px) rotate(-45deg); }

/* 胶囊导航 */
.capsule-nav{
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
  gap:4px;
  width:100%;
}
.capsule-nav__link{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding:8px 16px;
  border-radius:999px;
  border:1px solid transparent;
  font-size:15px;
  font-weight:500;
  line-height:1.4;
  text-decoration:none;
  color:var(--ink);
  transition:background-color .18s ease-out, color .18s ease-out,
             border-color .18s ease-out;
}
.capsule-nav__link:hover,
.capsule-nav__link:focus-visible{
  background:var(--canvas);
  border-color:var(--hairline);
}
.capsule-nav__link[aria-current="page"]{
  background:var(--ink);
  border-color:var(--ink);
  color:var(--paper);
}

/* 滚动收缩态（桌面） */
.site-head[data-collapsed="true"] .masthead{
  padding-top:8px;
  padding-bottom:8px;
  gap:8px;
}
.site-head[data-collapsed="true"] .brand__mark{ font-size:1.3rem; }
.site-head[data-collapsed="true"] .brand__subline{ opacity:0; height:0; margin:0; overflow:hidden; }
.site-head[data-collapsed="true"] .capsule-nav__link{
  padding:5px 12px;
  font-size:14px;
}

/* ---------- 6. 页脚 ---------- */
.site-foot{
  position:relative;
  margin-top:clamp(56px, 8vw, 96px);
  background:var(--ink);
  color:var(--teal-mist);
}
.site-foot::before{
  content:"";
  position:absolute;
  top:0; left:0; right:0;
  height:4px;
  background:linear-gradient(90deg, var(--teal) 0%, var(--teal-mist) 45%, var(--orange) 100%);
}
.site-foot__inner{
  max-width:var(--maxw);
  margin-inline:auto;
  padding:clamp(40px, 6vw, 60px) var(--gutter) 26px;
}
.site-foot__top{
  display:grid;
  grid-template-columns:minmax(220px, 1fr) 2fr;
  gap:clamp(24px, 4vw, 44px);
  padding-bottom:30px;
  border-bottom:1px solid rgba(168,237,228,.18);
}
.site-foot__brand{
  font-size:clamp(1.2rem, 2.4vw, 1.55rem);
  font-weight:900;
  letter-spacing:-.01em;
  line-height:1.35;
  color:var(--paper);
}
.site-foot__tagline{
  margin-top:10px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.02em;
  line-height:1.7;
  color:rgba(168,237,228,.7);
  max-width:26ch;
}
.site-foot__cols{
  display:grid;
  grid-template-columns:repeat(3, minmax(0,1fr));
  gap:clamp(18px, 3vw, 32px);
}
.foot-col__title{
  margin-bottom:12px;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:700;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--teal);
}
.foot-col__list{
  display:grid;
  gap:8px;
}
.foot-col__list a{
  display:inline-block;
  font-size:15px;
  line-height:1.6;
  color:var(--teal-mist);
  text-decoration:none;
  transition:color .18s ease-out, transform .18s ease-out;
}
.foot-col__list a:hover,
.foot-col__list a:focus-visible{
  color:var(--paper);
  transform:translateX(2px);
}
.site-foot__contact{
  padding-top:22px;
  display:grid;
  gap:4px;
}
.site-foot__contact-line{
  font-size:14px;
  line-height:1.7;
  color:var(--teal-mist);
  word-break:break-word;
}
.site-foot__note{
  margin-top:8px;
  max-width:64ch;
  font-size:13px;
  line-height:1.7;
  color:rgba(168,237,228,.72);
}
.site-foot__legal{
  margin-top:26px;
  padding-top:18px;
  border-top:1px solid rgba(168,237,228,.18);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:6px 18px;
  font-size:13px;
  color:rgba(168,237,228,.82);
}
.site-foot__legal a{
  color:rgba(168,237,228,.86);
  text-decoration:none;
  transition:color .18s ease-out;
}
.site-foot__legal a:hover,
.site-foot__legal a:focus-visible{
  color:var(--orange-soft);
  text-decoration:underline;
}

/* ---------- 7. 响应式 ---------- */
@media (max-width:1024px){
  .grid--3{ grid-template-columns:repeat(2, minmax(0,1fr)); }
}

@media (max-width:880px){
  .masthead{
    display:grid;
    grid-template-columns:1fr auto;
    align-items:center;
    justify-items:start;
    gap:10px 12px;
    padding:14px var(--gutter) 14px;
  }
  .brand{ text-align:left; }
  .brand__subline{ text-align:left; }
  .nav-toggle{ display:inline-flex; justify-self:end; }
  .capsule-nav{
    grid-column:1 / -1;
    display:none;
    flex-direction:column;
    align-items:stretch;
    justify-content:flex-start;
    gap:2px;
    width:100%;
    padding-top:10px;
    margin-top:4px;
    border-top:1px dashed var(--hairline);
  }
  .capsule-nav[data-open="true"]{ display:flex; }
  .capsule-nav__link{
    justify-content:flex-start;
    border-radius:var(--radius-sm);
    padding:12px 14px;
    font-size:16px;
  }
  .grid--sidebar{ grid-template-columns:minmax(0,1fr); }
  .site-foot__top{
    grid-template-columns:minmax(0,1fr);
    gap:28px;
  }
}

@media (max-width:720px){
  .grid--2,
  .grid--3{ grid-template-columns:minmax(0,1fr); }
  .site-head__inner{ font-size:11px; }
  .site-head__batch{ font-size:11px; }
  .quick-link{ padding:4px 8px; }
}

@media (max-width:560px){
  .site-head__batch{ display:none; }
  .site-foot__cols{ grid-template-columns:repeat(2, minmax(0,1fr)); gap:22px; }
  .site-foot__inner{ padding-top:36px; }
}

@media (prefers-reduced-motion:reduce){
  *,
  *::before,
  *::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  html{ scroll-behavior:auto; }
  .is-reveal-pending{
    opacity:1 !important;
    transform:none !important;
  }
  .foot-col__list a:hover{ transform:none; }
  .btn:hover{ transform:none; }
}