/* ============================================================
   传奇指南 · 共享站点样式 /assets/site.css
   技术蓝图网格 / 切角面板 / 暖纸与深墨 / 传奇红信号
   ============================================================ */

:root{
  --red:#C8102E;
  --red-deep:#8A0B1E;
  --gold:#D4A017;
  --ink:#1A1A2E;
  --char:#2B2B33;
  --jade:#2E8B57;
  --jade-deep:#1F5E3D;
  --mist:#E8E6E1;
  --paper:#F5F1E8;
  --red-soft:#F6DDE1;

  --font-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"JetBrains Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --w-max:1180px;
  --w-read:760px;
  --gutter:clamp(18px,4vw,48px);
  --header-h:76px;
  --notch:14px;
  --speed:.26s;
}

@media (max-width:860px){
  :root{ --header-h:64px; }
}

/* ---------- Reset ---------- */
*,*::before,*::after{ box-sizing:border-box; }
html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:calc(var(--header-h) + 20px);
}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.76;
  color:var(--ink);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img,svg,video{ display:block; max-width:100%; height:auto; }
button{ font:inherit; color:inherit; }
ul,ol{ margin:0; padding:0; }
:focus-visible{ outline:3px solid var(--gold); outline-offset:3px; }
::selection{ background:var(--red); color:#fff; }

#main-content{ display:block; padding-top:var(--header-h); }
#main-content:focus{ outline:none; }

/* ---------- 中文排版 ---------- */
h1,h2,h3,h4{
  margin:0 0 .58em;
  font-weight:900;
  line-height:1.18;
  letter-spacing:.01em;
  color:inherit;
}
h1{ font-size:clamp(34px,5.6vw,56px); line-height:1.1; }
h2{ font-size:clamp(28px,3.8vw,40px); line-height:1.22; }
h3{ font-size:clamp(22px,2.4vw,28px); }
h4{ font-size:20px; }
p{ margin:0 0 1em; }
p:last-child{ margin-bottom:0; }
a{ color:var(--red); }
strong{ font-weight:800; }

.slant{ display:inline-block; transform:skewX(-3deg); }
.divider-line{ display:block; height:1px; border:0; background:rgba(26,26,46,.16); margin:0; }

/* ---------- 布局基础 ---------- */
.container{
  width:100%;
  max-width:var(--w-max);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.section{ padding-block:clamp(48px,7vw,96px); }
.section--tight{ padding-block:clamp(28px,4vw,56px); }

.grid{ display:grid; gap:clamp(16px,3vw,32px); }
.grid--2{ grid-template-columns:repeat(2,minmax(0,1fr)); }
.grid--3{ grid-template-columns:repeat(3,minmax(0,1fr)); }

.grid-blueprint{
  background-image:
    linear-gradient(rgba(26,26,46,.06) 1px,transparent 1px),
    linear-gradient(90deg,rgba(26,26,46,.06) 1px,transparent 1px);
  background-size:32px 32px;
  background-position:-1px -1px;
}

/* ---------- 章节识别 ---------- */
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  margin:0 0 14px;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:700;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--jade-deep);
}
.eyebrow::before{
  content:"";
  width:28px;
  height:2px;
  background:var(--red);
}
.chapter{ position:relative; }
.chapter-num{
  display:block;
  font-family:var(--font-mono);
  font-size:clamp(48px,9vw,88px);
  font-weight:700;
  line-height:1;
  letter-spacing:-.03em;
  color:rgba(26,26,46,.13);
  margin-bottom:-.24em;
}
.chapter-title{
  margin:0 0 12px;
  font-size:clamp(28px,4vw,40px);
  font-weight:900;
  line-height:1.2;
}
.lede{
  max-width:46ch;
  font-size:20px;
  line-height:1.75;
  color:var(--char);
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  padding:14px 26px;
  font-size:17px;
  font-weight:700;
  letter-spacing:.02em;
  text-decoration:none;
  border:0;
  cursor:pointer;
  clip-path:polygon(0 0,100% 0,100% calc(100% - var(--notch)),calc(100% - var(--notch)) 100%,0 100%);
  transition:background var(--speed) ease,color var(--speed) ease,transform var(--speed) ease,box-shadow var(--speed) ease;
}
.btn--primary{ background:var(--red); color:#fff; }
.btn--primary:hover{ background:var(--red-deep); transform:translateY(-2px); }
.btn--ghost{ background:transparent; color:var(--ink); box-shadow:inset 0 0 0 2px var(--ink); }
.btn--ghost:hover{ background:var(--ink); color:var(--paper); }

/* ---------- 卡片 / 说明牌 ---------- */
.card{
  background:var(--mist);
  border:1px solid rgba(26,26,46,.12);
  padding:clamp(18px,3vw,28px);
  clip-path:polygon(0 0,100% 0,100% calc(100% - var(--notch)),calc(100% - var(--notch)) 100%,0 100%);
}
.panel{
  background:var(--paper);
  border:1px solid rgba(26,26,46,.14);
  border-top:4px solid var(--red);
  padding:clamp(18px,3vw,28px);
}
.tag{
  display:inline-block;
  padding:4px 10px;
  font-size:13px;
  font-weight:700;
  letter-spacing:.08em;
  background:var(--red-soft);
  color:var(--red-deep);
}

/* ---------- 面包屑 ---------- */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:14px;
  color:var(--char);
  list-style:none;
  margin:0 0 24px;
  padding:0;
}
.breadcrumb li{ display:inline-flex; align-items:center; gap:8px; }
.breadcrumb li + li::before{ content:"/"; color:rgba(26,26,46,.35); }
.breadcrumb a{
  color:var(--jade-deep);
  text-decoration:none;
  border-bottom:1px solid transparent;
}
.breadcrumb a:hover{ border-bottom-color:var(--jade-deep); }

/* ---------- 正文阅读列 ---------- */
.prose{ max-width:var(--w-read); }
.prose h2{ margin-top:1.6em; }
.prose h3{ margin-top:1.3em; }
.prose a{ color:var(--jade-deep); text-decoration:underline; text-underline-offset:3px; }
.prose ul,.prose ol{ padding-left:1.3em; margin:0 0 1.1em; }
.prose li{ margin-bottom:.5em; }

/* ---------- 图片容器基座 ---------- */
.media-frame{
  position:relative;
  overflow:hidden;
  background:var(--mist);
  border:1px solid rgba(26,26,46,.12);
  clip-path:polygon(0 0,100% 0,100% calc(100% - 18px),calc(100% - 18px) 100%,0 100%);
}
.media-frame img{
  width:100%;
  height:100%;
  object-fit:cover;
}
.media-frame--wide{ aspect-ratio:16 / 9; }
.media-frame--tall{ aspect-ratio:3 / 4; }
.media-caption{
  display:inline-block;
  padding:3px 9px;
  font-size:13px;
  font-weight:700;
  letter-spacing:.08em;
  background:var(--gold);
  color:var(--ink);
}

/* ---------- 锚点目录 ---------- */
.anchor-nav{
  position:sticky;
  top:calc(var(--header-h) + 24px);
  font-size:15px;
}
.anchor-nav a{
  display:block;
  padding:8px 0 8px 14px;
  color:var(--char);
  text-decoration:none;
  border-left:2px solid rgba(26,26,46,.15);
  transition:color var(--speed) ease,border-color var(--speed) ease;
}
.anchor-nav a:hover,
.anchor-nav a[aria-current="true"]{
  color:var(--red);
  border-left-color:var(--red);
}

/* ---------- 滚动显现 ---------- */
.reveal-pending{
  opacity:0;
  transform:translateY(18px);
  transition:opacity .6s ease,transform .6s cubic-bezier(.22,.61,.36,1);
  transition-delay:var(--reveal-delay,0ms);
}
.reveal-pending.is-visible{
  opacity:1;
  transform:none;
}

/* ============================================================
   页头
   ============================================================ */
.skip-link{
  position:absolute;
  left:16px;
  top:-64px;
  z-index:100;
  padding:12px 18px;
  background:var(--ink);
  color:var(--paper);
  font-size:15px;
  font-weight:700;
  text-decoration:none;
  transition:top .2s ease;
}
.skip-link:focus{ top:12px; }

.site-header{
  position:fixed;
  inset:0 0 auto 0;
  z-index:70;
  color:var(--ink);
  background:rgba(245,241,232,.9);
  -webkit-backdrop-filter:saturate(150%) blur(10px);
  backdrop-filter:saturate(150%) blur(10px);
  border-bottom:1px solid rgba(26,26,46,.14);
  transition:background .3s ease,color .3s ease,border-color .3s ease,box-shadow .3s ease;
}
.site-header[data-state="solid"]{
  background:var(--ink);
  color:var(--paper);
  border-bottom-color:rgba(212,160,23,.42);
  box-shadow:0 24px 44px -34px rgba(26,26,46,.95);
}

.scroll-meter{
  position:absolute;
  left:0;
  right:0;
  bottom:-1px;
  height:2px;
  z-index:3;
  pointer-events:none;
}
.scroll-meter__bar{
  display:block;
  height:100%;
  width:100%;
  transform:scaleX(0);
  transform-origin:0 50%;
  background:linear-gradient(90deg,var(--red),var(--gold));
  transition:transform .1s linear;
}

.header-inner{
  position:relative;
  z-index:2;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  width:100%;
  max-width:var(--w-max);
  margin-inline:auto;
  padding:12px var(--gutter);
  min-height:var(--header-h);
}

/* 品牌 */
.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  text-decoration:none;
  color:inherit;
  min-width:0;
}
.brand-mark{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  flex:0 0 auto;
  width:38px;
  height:38px;
  background:var(--red);
  color:#fff;
  font-family:var(--font-mono);
  font-size:14px;
  font-weight:700;
  letter-spacing:.02em;
  clip-path:polygon(0 0,100% 0,100% 66%,66% 100%,0 100%);
  transition:background var(--speed) ease;
}
.brand:hover .brand-mark{ background:var(--red-deep); }
.brand-text{
  display:flex;
  flex-direction:column;
  line-height:1.15;
  min-width:0;
}
.brand-name{
  font-size:21px;
  font-weight:900;
  letter-spacing:.06em;
  white-space:nowrap;
}
.brand-tagline{
  margin-top:2px;
  font-size:11px;
  letter-spacing:.2em;
  opacity:.72;
  white-space:nowrap;
}
.brand-version{
  align-self:flex-start;
  margin-top:2px;
  padding:2px 7px;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:700;
  letter-spacing:.1em;
  background:var(--gold);
  color:var(--ink);
  clip-path:polygon(0 0,100% 0,100% calc(100% - 6px),calc(100% - 6px) 100%,0 100%);
}

/* 页头动作区 */
.header-actions{
  display:flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
}
.magnet{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:11px 18px;
  background:var(--red);
  color:#fff;
  font-size:17px;
  font-weight:700;
  letter-spacing:.02em;
  text-decoration:none;
  white-space:nowrap;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 12px),calc(100% - 12px) 100%,0 100%);
  transition:background var(--speed) ease,transform var(--speed) ease;
}
.magnet:hover{ background:var(--red-deep); transform:translateX(2px); }
.magnet-index{
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:700;
  opacity:.72;
}
.magnet-label{ display:inline-block; }

.nav-toggle{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:10px 16px;
  background:transparent;
  border:1px solid currentColor;
  color:inherit;
  font-size:15px;
  font-weight:700;
  letter-spacing:.1em;
  cursor:pointer;
  clip-path:polygon(var(--notch) 0,100% 0,100% 100%,0 100%,0 var(--notch));
  transition:background var(--speed) ease,color var(--speed) ease,border-color var(--speed) ease;
}
.nav-toggle:hover{ background:rgba(200,16,46,.12); border-color:var(--red); color:var(--red); }
.site-header[data-state="solid"] .nav-toggle:hover{ background:rgba(212,160,23,.18); border-color:var(--gold); color:var(--gold); }
.nav-toggle-bars{
  display:inline-flex;
  flex-direction:column;
  justify-content:center;
  gap:4px;
  width:16px;
  height:12px;
}
.nav-toggle-bars span{
  display:block;
  height:2px;
  width:16px;
  background:currentColor;
  transition:transform .22s ease,opacity .22s ease;
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:first-child{
  transform:translateY(3px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:last-child{
  transform:translateY(-3px) rotate(-45deg);
}
.nav-toggle-text{ display:inline-block; }

/* 遮罩 */
.nav-scrim{
  position:fixed;
  inset:0;
  z-index:0;
  background:rgba(26,26,46,.5);
  opacity:0;
  visibility:hidden;
  pointer-events:none;
  transition:opacity .26s ease,visibility .26s ease;
}
[data-nav-open] .nav-scrim{
  opacity:1;
  visibility:visible;
  pointer-events:auto;
}

/* 栏目索引面板 */
.site-nav{
  position:absolute;
  z-index:1;
  top:calc(100% + 10px);
  right:var(--gutter);
  width:min(340px,calc(100vw - 2 * var(--gutter)));
  max-height:calc(100vh - var(--header-h) - 32px);
  overflow-y:auto;
  padding:20px 20px 22px;
  background:var(--ink);
  color:var(--paper);
  border-top:3px solid var(--red);
  clip-path:polygon(0 0,100% 0,100% calc(100% - 20px),calc(100% - 20px) 100%,0 100%);
  box-shadow:0 34px 64px -34px rgba(26,26,46,.95);
  opacity:0;
  visibility:hidden;
  transform:translateY(-8px);
  pointer-events:none;
  transition:opacity .24s ease,transform .24s ease,visibility .24s ease;
}
.site-nav[data-open]{
  opacity:1;
  visibility:visible;
  transform:none;
  pointer-events:auto;
}
.nav-kicker{
  margin:0 0 12px;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:700;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--gold);
}
.nav-list{
  list-style:none;
  margin:0;
  padding:0;
  display:grid;
  gap:0;
}
.nav-list li + li{ border-top:1px solid rgba(245,241,232,.12); }
.nav-link{
  display:block;
  padding:13px 12px;
  color:var(--paper);
  font-size:19px;
  font-weight:700;
  letter-spacing:.05em;
  text-decoration:none;
  transition:color var(--speed) ease,background var(--speed) ease,padding-left var(--speed) ease;
}
.nav-link:hover{
  color:var(--gold);
  background:rgba(200,16,46,.22);
  padding-left:18px;
}
.nav-link[aria-current="page"]{
  color:var(--gold);
  background:rgba(200,16,46,.26);
  box-shadow:inset 4px 0 0 var(--gold);
}
.nav-cta{
  display:flex;
  align-items:center;
  justify-content:center;
  margin-top:18px;
  padding:14px 18px;
  background:var(--red);
  color:#fff;
  font-size:17px;
  font-weight:800;
  letter-spacing:.06em;
  text-decoration:none;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 12px),calc(100% - 12px) 100%,0 100%);
  transition:background var(--speed) ease;
}
.nav-cta:hover{ background:var(--red-deep); }

/* ============================================================
   页脚
   ============================================================ */
.site-footer{
  position:relative;
  overflow:hidden;
  padding-top:clamp(48px,7vw,80px);
  background:var(--ink);
  color:var(--paper);
}
.footer-contour{
  position:absolute;
  inset:0;
  z-index:0;
  pointer-events:none;
  opacity:.9;
  background:repeating-radial-gradient(
    ellipse 120% 90% at 92% 118%,
    transparent 0 22px,
    rgba(212,160,23,.22) 22px 23px
  );
  -webkit-mask-image:linear-gradient(to top left,#000 0%,transparent 62%);
  mask-image:linear-gradient(to top left,#000 0%,transparent 62%);
}
.footer-inner{
  position:relative;
  z-index:1;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr .9fr 1.1fr .9fr;
  gap:clamp(28px,4vw,52px);
  padding-bottom:clamp(32px,5vw,56px);
}
.footer-brand-line{
  margin:0 0 14px;
  font-size:20px;
  font-weight:800;
  letter-spacing:.04em;
  line-height:1.5;
  color:var(--paper);
}
.footer-note{
  max-width:36ch;
  font-size:14px;
  line-height:1.9;
  color:rgba(245,241,232,.66);
}
.footer-heading{
  margin:0 0 16px;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:700;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--gold);
}
.arc-list,.legal-list,.contact-list{
  list-style:none;
  margin:0;
  padding:0;
}
.arc-list{ display:grid; gap:2px; }
.arc-link{
  display:inline-block;
  padding:6px 0;
  color:rgba(245,241,232,.82);
  font-size:16px;
  text-decoration:none;
  transition:color var(--speed) ease,transform var(--speed) ease;
}
.arc-link:hover,
.arc-link[aria-current="page"]{
  color:var(--gold);
  transform:translateX(4px);
}
.contact-list{ display:grid; gap:14px; }
.contact-item{ display:flex; flex-direction:column; gap:2px; }
.contact-label{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.2em;
  color:rgba(245,241,232,.5);
}
.contact-value{
  font-size:15px;
  line-height:1.7;
  color:var(--paper);
  word-break:break-word;
}
.legal-list{ display:grid; gap:2px; margin-bottom:18px; }
.legal-link{
  display:inline-block;
  padding:6px 0;
  color:rgba(245,241,232,.82);
  font-size:15px;
  text-decoration:none;
  transition:color var(--speed) ease;
}
.legal-link:hover,
.legal-link[aria-current="page"]{ color:var(--gold); }
.footer-icp{
  margin:0;
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.06em;
  color:rgba(245,241,232,.55);
}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:20px 0 26px;
  border-top:1px solid rgba(245,241,232,.16);
}
.footer-copy{
  margin:0;
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.04em;
  color:rgba(245,241,232,.55);
}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width:1080px){
  .grid--3{ grid-template-columns:repeat(2,minmax(0,1fr)); }
  .footer-grid{ grid-template-columns:1fr 1fr; }
}

@media (max-width:860px){
  body{ font-size:16px; }
  .grid--2,.grid--3{ grid-template-columns:minmax(0,1fr); }
  .brand-tagline{ display:none; }
  .brand-name{ font-size:19px; }
  .magnet{ font-size:16px; padding:10px 14px; }
  .nav-toggle{ padding:9px 13px; font-size:14px; }

  .site-nav{
    top:100%;
    left:0;
    right:0;
    width:auto;
    max-height:calc(100vh - var(--header-h));
    padding:14px 16px 22px;
    border-top-width:3px;
    clip-path:none;
    box-shadow:0 30px 50px -30px rgba(0,0,0,.9);
  }
  .nav-link{ font-size:18px; padding:13px 10px; }
  .nav-link:hover{ padding-left:14px; }
  .nav-cta{ margin-top:14px; }

  .footer-grid{ grid-template-columns:1fr; gap:32px; }
  .footer-note{ max-width:none; }
  .footer-bottom{ flex-direction:column; align-items:flex-start; }
  .anchor-nav{
    position:static;
    top:auto;
    display:flex;
    flex-wrap:wrap;
    gap:6px;
    margin-bottom:24px;
  }
  .anchor-nav a{
    border-left:0;
    border-bottom:2px solid rgba(26,26,46,.15);
    padding:6px 10px;
  }
  .anchor-nav a:hover,
  .anchor-nav a[aria-current="true"]{ border-left:0; border-bottom-color:var(--red); }
}

@media (max-width:520px){
  .nav-toggle-text{ display:none; }
  .nav-toggle{ padding:11px; }
  .brand-version{ display:none; }
  .magnet-index{ display:none; }
  .footer-brand-line{ font-size:18px; }
}

/* ---------- 减少动态效果 ---------- */
@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;
  }
  .reveal-pending{ opacity:1; transform:none; }
  .scroll-meter__bar{ transition:none; }
}