/* ==========================================================================
   /assets/site.css — 德州平台主站 · 共享外壳
   绒布深绿长卷 / 霓虹青指引 / 品红分类 / 暖金留给数值
   ========================================================================== */

/* ---------- 1. 变量 ---------- */
:root{
  --felt-black:#0A0F0D;
  --deep-green:#102019;
  --table-green:#16291F;
  --line-slate:#2C423A;
  --cloud:#E8F1EC;
  --body-text:#C4D6CD;
  --mist:#9BB0A6;
  --neon:#3FE0C6;
  --neon-dim:rgba(63,224,198,.32);
  --neon-soft:rgba(63,224,198,.08);
  --magnenta:#E2529E;
  --magenta:#E2529E;
  --gold:#E8B75C;
  --glow:rgba(63,224,198,.30);

  --font-display:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-body:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-mono:ui-monospace,"SFMono-Regular","JetBrains Mono",Menlo,Consolas,"Liberation Mono","Courier New",monospace;

  --shell-max:1180px;
  --gutter:clamp(18px,4vw,40px);
  --radius-pill:999px;
  --radius-lg:18px;
  --radius-md:12px;
  --hair:1px solid var(--line-slate);
  --header-space:96px;
}

/* ---------- 2. Reset ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
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,video{display:block;max-width:100%;}
button,input,select,textarea{font:inherit;color:inherit;background:none;border:0;}
a{color:inherit;text-decoration:none;}
table{border-collapse:collapse;width:100%;}
:focus-visible{outline:2px solid var(--neon);outline-offset:3px;border-radius:4px;}

/* ---------- 3. 基础 ---------- */
body{
  min-height:100vh;
  padding-top:var(--header-space);
  background-color:var(--felt-black);
  background-image:
    radial-gradient(70% 45% at 88% -8%, rgba(63,224,198,.09), transparent 62%),
    radial-gradient(55% 42% at -6% 104%, rgba(226,82,158,.055), transparent 62%);
  background-repeat:no-repeat;
  background-attachment:fixed;
  color:var(--body-text);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.85;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
#main-content{display:block;min-height:50vh;scroll-margin-top:110px;}

/* ---------- 4. 跳过链接 ---------- */
.skip-link{
  position:fixed;
  top:10px;left:50%;
  z-index:200;
  transform:translate(-50%,-260%);
  padding:12px 22px;
  border-radius:var(--radius-pill);
  background:var(--neon);
  color:#04211B;
  font-size:14px;
  font-weight:700;
  letter-spacing:.04em;
  transition:transform .22s ease;
}
.skip-link:focus,
.skip-link:focus-visible{transform:translate(-50%,0);}

/* ---------- 5. 阅读进度条 ---------- */
.read-progress{
  position:fixed;
  top:0;left:0;right:0;
  height:2px;
  z-index:150;
  transform:scaleX(0);
  transform-origin:0 50%;
  background:linear-gradient(90deg,var(--neon),var(--gold) 68%,var(--magenta));
  box-shadow:0 0 10px var(--glow);
  pointer-events:none;
  will-change:transform;
}

/* ---------- 6. 悬浮胶囊头部 ---------- */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:120;
  padding:14px var(--gutter) 0;
}
.header-island{
  position:relative;
  display:flex;
  align-items:center;
  gap:clamp(10px,1.8vw,24px);
  max-width:var(--shell-max);
  margin:0 auto;
  padding:10px 12px 10px 18px;
  border:var(--hair);
  border-radius:var(--radius-pill);
  background:linear-gradient(120deg,rgba(16,32,25,.94),rgba(10,15,13,.88));
  -webkit-backdrop-filter:blur(14px) saturate(1.25);
  backdrop-filter:blur(14px) saturate(1.25);
  transition:padding .3s ease,box-shadow .3s ease,background .3s ease;
  animation:island-in .6s cubic-bezier(.2,.7,.3,1) both;
}
@keyframes island-in{
  from{opacity:0;transform:translateY(-14px);}
  to{opacity:1;transform:none;}
}
.site-header[data-scrolled="true"] .header-island{
  padding:6px 10px 6px 14px;
  background:linear-gradient(120deg,rgba(16,32,25,.97),rgba(10,15,13,.94));
  box-shadow:0 14px 38px rgba(0,0,0,.5),0 0 0 1px rgba(63,224,198,.10);
}

/* 品牌 */
.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  flex:0 0 auto;
  min-width:0;
}
.brand__mark{
  display:grid;
  place-items:center;
  width:38px;height:38px;
  flex:0 0 auto;
  border-radius:50%;
  color:var(--neon);
  border:1px solid var(--neon-dim);
  background:var(--neon-soft);
  box-shadow:0 0 20px rgba(63,224,198,.20);
  transition:transform .3s ease,box-shadow .3s ease;
}
.brand:hover .brand__mark{
  transform:rotate(-8deg);
  box-shadow:0 0 28px rgba(63,224,198,.38);
}
.brand__text{display:flex;flex-direction:column;line-height:1.16;min-width:0;}
.brand__name{
  font-size:16px;
  font-weight:800;
  letter-spacing:.02em;
  color:var(--cloud);
  white-space:nowrap;
}
.brand__line{
  font-size:11px;
  letter-spacing:.05em;
  color:var(--mist);
  white-space:nowrap;
}

/* 移动端菜单按钮 */
.nav-toggle{
  display:none;
  margin-left:auto;
  align-items:center;
  gap:9px;
  padding:10px 15px;
  border-radius:var(--radius-pill);
  border:1px solid var(--neon-dim);
  background:var(--neon-soft);
  color:var(--neon);
  font-size:13px;
  letter-spacing:.08em;
  cursor:pointer;
  transition:background .22s ease,border-color .22s ease;
}
.nav-toggle:hover{background:rgba(63,224,198,.15);}
.nav-toggle__bars,
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  display:block;
  width:16px;height:1.5px;
  border-radius:2px;
  background:currentColor;
  transition:transform .24s ease,top .24s ease,background .24s ease;
}
.nav-toggle__bars{position:relative;}
.nav-toggle__bars::before,
.nav-toggle__bars::after{content:"";position:absolute;left:0;}
.nav-toggle__bars::before{top:-5px;}
.nav-toggle__bars::after{top:5px;}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars{background:transparent;}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{top:0;transform:rotate(45deg);}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{top:0;transform:rotate(-45deg);}
.nav-toggle__label{white-space:nowrap;}

/* 导航 */
.nav{
  display:flex;
  align-items:center;
  gap:clamp(6px,1.2vw,14px);
  margin-left:auto;
}
.nav__list{
  display:flex;
  align-items:center;
  gap:2px;
}
.nav__item{flex:0 0 auto;}
.nav__link{
  display:inline-flex;
  align-items:center;
  padding:9px 14px;
  border-radius:var(--radius-pill);
  border:1px solid transparent;
  color:var(--mist);
  font-size:14px;
  letter-spacing:.02em;
  white-space:nowrap;
  transition:color .22s ease,background .22s ease,border-color .22s ease,box-shadow .22s ease;
}
.nav__link:hover{color:var(--cloud);background:var(--neon-soft);}
.nav__link[aria-current="page"]{
  color:var(--neon);
  background:rgba(63,224,198,.11);
  border-color:var(--neon-dim);
  box-shadow:inset 0 0 14px rgba(63,224,198,.10);
}
.header-cta{
  flex:0 0 auto;
  padding:10px 18px;
  font-size:13.5px;
  white-space:nowrap;
}

/* ---------- 7. 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 22px;
  border-radius:var(--radius-pill);
  border:1px solid transparent;
  font-family:var(--font-body);
  font-size:14px;
  font-weight:600;
  letter-spacing:.04em;
  line-height:1.3;
  text-align:center;
  cursor:pointer;
  transition:transform .22s ease,box-shadow .22s ease,background .22s ease,border-color .22s ease,color .22s ease;
}
.btn--neon{
  background:linear-gradient(120deg,rgba(63,224,198,.96),rgba(63,224,198,.72));
  color:#04211B;
  box-shadow:0 0 0 1px rgba(63,224,198,.45),0 10px 26px rgba(63,224,198,.20);
}
.btn--neon:hover{
  transform:translateY(-1px);
  box-shadow:0 0 0 1px rgba(63,224,198,.9),0 14px 34px rgba(63,224,198,.34);
}
.btn--ghost{
  border-color:var(--line-slate);
  color:var(--cloud);
}
.btn--ghost:hover{
  border-color:var(--neon-dim);
  color:var(--neon);
  background:var(--neon-soft);
}
.btn--gold{
  border-color:rgba(232,183,92,.42);
  color:var(--gold);
  background:rgba(232,183,92,.06);
}
.btn--gold:hover{
  border-color:var(--gold);
  background:rgba(232,183,92,.13);
}
.btn--block{width:100%;}

/* ---------- 8. 布局 ---------- */
.container{
  width:100%;
  max-width:var(--shell-max);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.container--narrow{max-width:820px;}
.grid{display:grid;gap:clamp(16px,2.4vw,32px);}
.grid--5-7{grid-template-columns:5fr 7fr;}
.grid--7-5{grid-template-columns:7fr 5fr;}
.grid--3-9{grid-template-columns:3fr 9fr;}
.grid--auto{grid-template-columns:repeat(auto-fit,minmax(260px,1fr));}

/* ---------- 9. 中文排版 ---------- */
.display-1,
.display-2,
.display-3,
.section-head__title{
  font-family:var(--font-display);
  color:var(--cloud);
  font-weight:900;
  letter-spacing:-.035em;
  line-height:1.05;
  text-wrap:balance;
}
.display-1{font-size:clamp(40px,7.6vw,76px);}
.display-2{font-size:clamp(28px,4.6vw,48px);}
.display-3{font-size:clamp(21px,2.6vw,28px);letter-spacing:-.02em;line-height:1.25;}
.glow{text-shadow:0 0 26px rgba(63,224,198,.34),0 0 60px rgba(63,224,198,.14);}

.lead{
  max-width:36em;
  font-size:clamp(16px,1.6vw,19px);
  line-height:1.9;
  color:#C9DBD2;
}
.mono{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:.02em;
}
.num{
  font-family:var(--font-mono);
  font-weight:700;
  font-variant-numeric:tabular-nums;
  color:var(--gold);
  letter-spacing:0;
}

.prose{max-width:38em;font-size:16px;line-height:1.9;color:var(--body-text);}
.prose > * + *{margin-top:1.1em;}
.prose h2,.prose h3{color:var(--cloud);line-height:1.35;letter-spacing:-.01em;}
.prose h2{font-size:22px;margin-top:2em;}
.prose h3{font-size:17px;}
.prose strong{color:var(--cloud);font-weight:700;}
.prose a{
  color:var(--neon);
  text-decoration:underline;
  text-decoration-thickness:1px;
  text-underline-offset:3px;
}
.prose ul{display:grid;gap:9px;}
.prose li{position:relative;padding-left:18px;}
.prose li::before{
  content:"";
  position:absolute;
  left:0;top:.74em;
  width:6px;height:6px;
  border-radius:50%;
  background:var(--neon);
  opacity:.75;
}

/* ---------- 10. 章节开场 ---------- */
.section-head{
  display:flex;
  align-items:flex-start;
  gap:clamp(12px,2vw,24px);
  margin-bottom:clamp(20px,3vw,38px);
}
.section-head__index{
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.28em;
  color:var(--gold);
  padding-top:.45em;
  flex:0 0 auto;
}
.section-head__body{flex:1 1 auto;min-width:0;}
.section-head__title{display:block;}
.section-head__note{
  writing-mode:vertical-rl;
  font-size:12px;
  letter-spacing:.3em;
  color:var(--mist);
  padding-top:4px;
  flex:0 0 auto;
  max-height:180px;
}

/* ---------- 11. 标签 ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 11px;
  border-radius:var(--radius-pill);
  border:1px solid var(--line-slate);
  color:var(--mist);
  font-size:12px;
  letter-spacing:.06em;
  line-height:1.6;
}
.tag--neon{
  color:var(--neon);
  border-color:var(--neon-dim);
  background:var(--neon-soft);
}
.tag--magenta{
  color:var(--magnenta);
  border-color:rgba(226,82,158,.42);
  background:rgba(226,82,158,.09);
}
.tag--gold{
  color:var(--gold);
  border-color:rgba(232,183,92,.42);
  background:rgba(232,183,92,.09);
}

/* ---------- 12. 面包屑 ---------- */
.breadcrumbs{
  padding:clamp(18px,2.4vw,30px) 0 clamp(10px,1.6vw,18px);
  font-size:13px;
  color:var(--mist);
}
.breadcrumbs ol{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
}
.breadcrumbs li + li::before{
  content:"/";
  margin-right:8px;
  color:var(--line-slate);
}
.breadcrumbs a{color:var(--mist);transition:color .22s ease;}
.breadcrumbs a:hover{color:var(--neon);}
.breadcrumbs [aria-current="page"]{color:var(--cloud);}

/* ---------- 13. 媒体容器 ---------- */
.media-frame{
  position:relative;
  overflow:hidden;
  aspect-ratio:16 / 9;
  border:var(--hair);
  border-radius:var(--radius-lg);
  background:
    radial-gradient(120% 120% at 18% 0%, rgba(63,224,198,.13), transparent 62%),
    linear-gradient(160deg,var(--table-green),var(--deep-green));
}
.media-frame--wide{aspect-ratio:21 / 9;}
.media-frame--tall{aspect-ratio:3 / 4;}
.media-frame--square{aspect-ratio:1 / 1;}
.media-frame__img{
  width:100%;height:100%;
  object-fit:cover;
  display:block;
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:
    radial-gradient(110% 90% at 50% 120%, rgba(10,15,13,.72), transparent 62%),
    linear-gradient(200deg, rgba(63,224,198,.06), transparent 55%);
}
.media-caption{
  margin-top:10px;
  font-size:12.5px;
  letter-spacing:.04em;
  color:var(--mist);
}

/* ---------- 14. 面板与数据 ---------- */
.surface{
  position:relative;
  padding:clamp(18px,2.4vw,30px);
  border:var(--hair);
  border-radius:var(--radius-lg);
  background:linear-gradient(150deg,rgba(22,41,31,.92),rgba(13,22,18,.86));
}
.surface--flush{padding:0;overflow:hidden;}
.rule{
  height:1px;
  border:0;
  margin:clamp(28px,4vw,56px) 0;
  background:linear-gradient(90deg,var(--line-slate),rgba(44,66,58,.15) 70%,transparent);
}
.stat{display:grid;gap:4px;}
.stat__value{
  font-family:var(--font-mono);
  font-size:clamp(26px,3.6vw,40px);
  font-weight:700;
  line-height:1.05;
  letter-spacing:-.01em;
  color:var(--gold);
}
.stat__label{
  font-size:12.5px;
  letter-spacing:.14em;
  color:var(--mist);
}
.metric-row{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  justify-content:space-between;
  gap:8px 18px;
  padding:13px 0;
  border-bottom:1px solid var(--line-slate);
}
.metric-row:last-child{border-bottom:0;}
.ladder{display:grid;gap:10px;}
.ladder__step{
  display:grid;
  grid-template-columns:auto 1fr auto;
  align-items:center;
  gap:14px;
  padding:13px 16px;
  border-radius:var(--radius-md);
  border:var(--hair);
  background:linear-gradient(90deg,rgba(63,224,198,.06),transparent 66%);
  transition:border-color .24s ease,box-shadow .24s ease,background .24s ease;
}
.ladder__step[data-active="true"]{
  border-color:var(--neon-dim);
  background:linear-gradient(90deg,rgba(63,224,198,.14),rgba(63,224,198,.02) 70%);
  box-shadow:0 0 0 1px rgba(63,224,198,.16),0 0 30px rgba(63,224,198,.12);
}

/* ---------- 15. 进场显现 ---------- */
html.js [data-reveal]{
  opacity:0;
  transform:translateY(20px);
  transition:opacity .32s ease,transform .32s ease;
}
html.js [data-reveal].is-visible{
  opacity:1;
  transform:none;
}
[data-highlight]{
  transition:border-color .3s ease,background .3s ease;
}

/* ---------- 16. 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(72px,10vw,160px);
  padding-top:clamp(44px,6vw,84px);
  border-top:var(--hair);
  color:var(--body-text);
  background:
    radial-gradient(90% 70% at 8% 0%, rgba(63,224,198,.12), transparent 62%),
    radial-gradient(70% 60% at 100% 8%, rgba(226,82,158,.07), transparent 58%),
    linear-gradient(180deg,rgba(16,32,25,.96),var(--felt-black) 78%);
}
.site-footer::before{
  content:"";
  position:absolute;
  top:-1px;left:0;right:0;
  height:1px;
  background:linear-gradient(90deg,transparent,var(--neon) 30%,var(--gold) 62%,transparent);
  opacity:.5;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.3fr;
  gap:clamp(24px,3.4vw,48px);
  padding-bottom:clamp(32px,4vw,56px);
}
.footer-brand{display:grid;gap:14px;align-content:start;}
.footer-brand__home{display:inline-flex;align-items:center;gap:10px;}
.footer-brand__mark{
  display:grid;
  place-items:center;
  width:34px;height:34px;
  flex:0 0 auto;
  border-radius:50%;
  color:var(--neon);
  border:1px solid var(--neon-dim);
  background:var(--neon-soft);
}
.footer-brand__name{
  font-size:15px;
  font-weight:800;
  letter-spacing:.06em;
  color:var(--cloud);
}
.footer-brand__desc{
  max-width:26em;
  font-size:13.5px;
  line-height:1.85;
  color:var(--mist);
}
.footer-brand__meta{
  font-size:12px;
  letter-spacing:.06em;
  color:rgba(155,176,166,.8);
}
.footer-col{display:grid;gap:16px;align-content:start;}
.footer-col__title{
  margin:0;
  padding-bottom:10px;
  border-bottom:1px solid var(--line-slate);
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:500;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--mist);
}
.footer-list{display:grid;gap:10px;font-size:14px;}
.footer-list a{color:#BFD3C9;transition:color .22s ease,padding-left .22s ease;}
.footer-list a:hover{color:var(--neon);padding-left:4px;}
.footer-list--plain li{display:grid;gap:2px;}
.footer-label{
  font-size:11px;
  letter-spacing:.16em;
  color:var(--mist);
}
.footer-value{
  font-size:13px;
  color:var(--cloud);
  word-break:break-word;
}
.footer-legal{
  padding:18px 0 26px;
  border-top:1px solid var(--line-slate);
  background:linear-gradient(180deg,transparent,rgba(63,224,198,.045));
}
.footer-legal__inner{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px 24px;
  font-size:12.5px;
  color:var(--mist);
}
.footer-legal__copy,
.footer-legal__closing{margin:0;}

/* ---------- 17. 平板与桌面断点 ---------- */
@media (max-width:1024px){
  .nav__link{padding:9px 11px;font-size:13.5px;}
  .header-cta{padding:9px 15px;font-size:13px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px 24px;}
  .footer-brand{grid-column:1 / -1;}
}

@media (max-width:900px){
  :root{--header-space:82px;}
  .site-header{padding:10px var(--gutter) 0;}
  .nav-toggle{display:inline-flex;}
  .nav{
    position:absolute;
    top:calc(100% + 10px);
    left:-6px;right:-6px;
    flex-direction:column;
    align-items:stretch;
    gap:4px;
    margin:0;
    padding:12px;
    border:var(--hair);
    border-radius:22px;
    background:linear-gradient(160deg,#12241C,#0B130F 92%);
    box-shadow:0 26px 64px rgba(0,0,0,.58),0 0 0 1px rgba(63,224,198,.06);
    opacity:0;
    visibility:hidden;
    transform:translateY(-10px);
    transition:opacity .24s ease,transform .24s ease,visibility .24s ease;
  }
  .nav[data-open="true"]{
    opacity:1;
    visibility:visible;
    transform:none;
  }
  .nav__list{flex-direction:column;align-items:stretch;gap:2px;}
  .nav__link{
    padding:12px 16px;
    border-radius:14px;
    font-size:15px;
  }
  .nav__link[aria-current="page"]{background:rgba(63,224,198,.12);}
  .header-cta{width:100%;margin-top:6px;padding:13px 18px;}
  .grid--5-7,
  .grid--7-5,
  .grid--3-9{grid-template-columns:1fr;}
  .section-head__note{max-height:130px;}
}

@media (max-width:560px){
  body{font-size:15.5px;}
  .brand__line{display:none;}
  .brand__name{font-size:14.5px;}
  .brand__mark{width:34px;height:34px;}
  .header-island{padding:8px 10px 8px 14px;}
  .site-header[data-scrolled="true"] .header-island{padding:6px 10px 6px 12px;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-legal__inner{flex-direction:column;align-items:flex-start;}
  .breadcrumbs{font-size:12.5px;}
  .ladder__step{grid-template-columns:auto 1fr;row-gap:6px;}
}

/* ---------- 18. 动效降级 ---------- */
@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.js [data-reveal]{opacity:1 !important;transform:none !important;}
  .site-header .header-island{animation:none;opacity:1;transform:none;}
}