*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body,h1,h2,h3,h4,p,figure,ul,ol,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
img,svg{max-width:100%;display:block}
a{color:inherit}
button{font:inherit}

:root{
  --ink:#071C17;
  --felt:#0E2A22;
  --felt-hi:#123A2F;
  --cyan:#16E0C6;
  --mist:#7CF5E4;
  --orange:#FF8A3D;
  --amber:#FFC46B;
  --bone:#F4F1E8;
  --edge:#030806;
  --mute:#8AA8A0;
  --alarm:#FF5C5C;
  --rail-w:232px;
  --head-h:64px;
  --gutter:clamp(16px,4vw,40px);
  --radius:18px;
  --shadow-hard:8px 8px 0 var(--edge);
  --shadow-mid:4px 4px 0 var(--edge);
  --ease:cubic-bezier(.2,.7,.3,1);
  --font-display:"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei","Arial Narrow",system-ui,sans-serif;
  --font-body:"PingFang SC","Hiragino Sans GB","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:ui-monospace,"SFMono-Regular",Menlo,Consolas,"Courier New",monospace;
  --font-serif:Georgia,"Songti SC","Noto Serif SC",serif;
}

html{scroll-behavior:smooth}
body{
  min-height:100vh;
  padding-top:calc(var(--head-h) + 14px);
  background:
    radial-gradient(120% 80% at 10% -10%, rgba(22,224,198,.14), transparent 58%),
    radial-gradient(90% 70% at 96% 4%, rgba(255,138,61,.11), transparent 60%),
    repeating-linear-gradient(45deg, rgba(244,241,232,.02) 0 2px, transparent 2px 6px),
    var(--ink);
  background-attachment:fixed;
  color:var(--bone);
  font-family:var(--font-body);
  font-size:16.5px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
::selection{background:var(--orange);color:#231000}
:focus-visible{outline:3px solid var(--cyan);outline-offset:3px;border-radius:8px}
#main-content:focus{outline:none}

h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:800;
  letter-spacing:-.025em;
  line-height:1.15;
  color:var(--bone);
  text-wrap:balance;
}
h1{font-size:clamp(32px,5vw,64px);text-shadow:3px 3px 0 rgba(3,8,6,.72)}
h2{font-size:clamp(26px,3.2vw,36px)}
h3{font-size:clamp(19px,1.9vw,23px)}
p{max-width:68ch}
a{text-decoration-thickness:1px;text-underline-offset:3px}

/* ===== 内容容器与网格 ===== */
.wrap{width:100%;max-width:1180px;margin:0 auto;padding:0 var(--gutter)}
.grid-12{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:clamp(14px,2vw,24px)}
.col-3,.col-6,.col-8,.col-12{grid-column:span 12}
@media (min-width:768px){
  .col-3{grid-column:span 3}
  .col-6{grid-column:span 6}
  .col-8{grid-column:span 8}
  .col-12{grid-column:span 12}
}

/* ===== 文字层级 ===== */
.eyebrow{
  display:block;
  margin:0 0 10px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--cyan);
}
.lede{font-size:clamp(17px,1.4vw,19px);line-height:1.8;color:#D8E6E1;max-width:60ch;margin:0 0 20px}
.mono{font-family:var(--font-mono);letter-spacing:.04em}
.accent{font-family:var(--font-serif);font-style:italic;color:var(--amber);letter-spacing:.01em}

/* ===== 面包屑 ===== */
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  margin:0 0 20px;
  font-family:var(--font-mono);font-size:12.5px;letter-spacing:.05em;color:var(--mute);
}
.crumb{color:var(--mist);text-decoration:none;border-bottom:1px solid rgba(124,245,228,.35);transition:color .16s var(--ease),border-color .16s var(--ease)}
.crumb:hover,.crumb:focus-visible{color:var(--cyan);border-bottom-color:var(--cyan)}
.crumb-sep{color:rgba(138,168,160,.6)}
.crumb-current{color:var(--bone)}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:11px 18px;
  border:2px solid var(--edge);border-radius:999px;
  font-family:var(--font-body);font-size:15px;font-weight:700;letter-spacing:.02em;
  text-decoration:none;cursor:pointer;
  transition:transform .16s var(--ease),box-shadow .16s var(--ease),background .16s var(--ease),color .16s var(--ease),border-color .16s var(--ease);
}
.btn--primary{background:linear-gradient(120deg,var(--orange),var(--amber));color:#231000;box-shadow:var(--shadow-mid)}
.btn--primary:hover,.btn--primary:focus-visible{transform:translate(-1px,-2px);box-shadow:6px 7px 0 var(--edge)}
.btn--ghost{background:transparent;color:var(--mist);border-color:rgba(124,245,228,.42)}
.btn--ghost:hover,.btn--ghost:focus-visible{background:rgba(22,224,198,.12);border-color:var(--cyan);color:var(--bone)}

/* ===== 面板 / 贴纸 / 步骤号 / 标签 ===== */
.panel{
  position:relative;
  padding:clamp(18px,3vw,28px);
  border:2px solid var(--edge);border-radius:var(--radius);
  background:linear-gradient(160deg,rgba(18,58,47,.96),rgba(10,35,28,.96));
  box-shadow:var(--shadow-hard);
}
.panel--quiet{background:rgba(14,42,34,.6);box-shadow:none;border-color:rgba(124,245,228,.22)}
.sticker{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border:2px solid var(--edge);border-radius:999px;
  background:var(--amber);color:#241300;
  font-family:var(--font-mono);font-size:12px;font-weight:700;letter-spacing:.06em;
  box-shadow:3px 3px 0 var(--edge);transform:rotate(-1.5deg);
}
.sticker--cyan{background:var(--cyan);color:#04211B;transform:rotate(1.2deg)}
.sticker--alarm{background:var(--alarm);color:#2B0000;transform:rotate(-2deg)}
.step-num{
  display:inline-grid;place-items:center;
  min-width:46px;height:46px;padding:0 10px;
  border:2px solid var(--edge);border-radius:12px;
  background:var(--felt);color:var(--orange);
  font-family:var(--font-mono);font-size:20px;font-weight:700;line-height:1;
  box-shadow:3px 3px 0 var(--edge);
  transition:background .18s var(--ease),color .18s var(--ease),box-shadow .18s var(--ease);
}
.step-num--hot{background:linear-gradient(120deg,var(--orange),var(--amber));color:#231000;box-shadow:3px 3px 0 var(--edge),0 0 14px rgba(255,138,61,.55)}
.tag-row{display:flex;flex-wrap:wrap;gap:8px}
.tag{
  appearance:none;-webkit-appearance:none;cursor:pointer;
  min-height:38px;padding:7px 14px;
  border:2px solid rgba(124,245,228,.36);border-radius:999px;
  background:rgba(22,224,198,.06);color:var(--mist);
  font:inherit;font-size:13.5px;font-weight:600;
  transition:background .16s var(--ease),color .16s var(--ease),border-color .16s var(--ease),box-shadow .16s var(--ease),transform .16s var(--ease);
}
.tag:hover{border-color:var(--cyan);color:var(--bone);transform:translateY(-1px)}
.tag.is-active,.tag[aria-pressed="true"]{background:var(--cyan);color:#04211B;border-color:var(--edge);box-shadow:3px 3px 0 var(--edge)}

/* ===== 图片容器基础规则 ===== */
.media-frame{
  position:relative;overflow:hidden;
  aspect-ratio:4/3;
  border:2px solid var(--edge);border-radius:calc(var(--radius) + 4px);
  background:
    radial-gradient(120% 120% at 18% 0%, rgba(22,224,198,.20), transparent 56%),
    linear-gradient(140deg,var(--felt-hi),var(--ink) 72%);
  box-shadow:var(--shadow-hard);
}
.media-frame img{width:100%;height:100%;object-fit:cover;filter:saturate(1.06) contrast(1.04)}
.media-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:repeating-linear-gradient(180deg,rgba(3,8,6,.16) 0 1px,transparent 1px 4px);
  opacity:.45;mix-blend-mode:overlay;
  transition:opacity .3s var(--ease);
}
.media-frame:hover::after{opacity:.8}
.media-frame--wide{aspect-ratio:16/9}
.media-frame--tall{aspect-ratio:3/4}
.media-frame--square{aspect-ratio:1/1}
.media-tag{position:absolute;top:10px;left:10px;z-index:2}
.media-caption{margin:10px 0 0;font-family:var(--font-mono);font-size:12px;letter-spacing:.05em;color:var(--mute)}

/* ===== 跳转链接 ===== */
.skip-link{
  position:fixed;top:8px;left:8px;z-index:100;
  transform:translateY(-180%);
  padding:10px 16px;border:2px solid var(--edge);border-radius:999px;
  background:var(--cyan);color:#04211B;
  font-weight:700;text-decoration:none;
  transition:transform .18s var(--ease);
}
.skip-link:focus{transform:none}

/* ===== 滚动进度 ===== */
.scan-progress{position:fixed;top:0;left:0;right:0;height:3px;z-index:80;background:rgba(22,224,198,.12);pointer-events:none}
.scan-progress-fill{
  display:block;width:100%;height:100%;
  transform:scaleX(0);transform-origin:0 50%;
  background:linear-gradient(90deg,var(--cyan),var(--amber));
  box-shadow:0 0 12px rgba(22,224,198,.8);
  transition:transform .1s linear;
}

/* ===== 页头：移动端顶部条 ===== */
.site-head{
  position:fixed;inset:0 0 auto 0;z-index:50;
  background:linear-gradient(180deg,rgba(14,42,34,.99),rgba(7,28,23,.98));
  border-bottom:2px solid var(--edge);
  box-shadow:0 2px 0 rgba(22,224,198,.22),0 16px 32px -20px #000;
}
.head-inner{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  min-height:var(--head-h);max-width:1440px;margin:0 auto;
  padding:10px var(--gutter);
}
.head-brand{display:flex;align-items:center;gap:12px;min-width:0}
.brand-mark{display:flex;align-items:center;gap:12px;text-decoration:none;color:inherit;min-width:0}
.brand-glyph{
  display:grid;place-items:center;flex:0 0 auto;
  width:44px;height:44px;
  border:2px solid var(--edge);border-radius:14px;
  background:linear-gradient(135deg,var(--cyan),#0FB3A0);color:#03211B;
  font-family:var(--font-display);font-size:18px;font-weight:800;letter-spacing:-.04em;
  box-shadow:3px 3px 0 var(--edge);transform:rotate(-3deg);
  transition:transform .2s var(--ease);
}
.brand-mark:hover .brand-glyph,.brand-mark:focus-visible .brand-glyph{transform:rotate(4deg) translateY(-2px)}
.brand-text{display:grid;gap:1px;min-width:0}
.brand-name{
  font-family:var(--font-display);font-size:19px;font-weight:800;letter-spacing:-.02em;line-height:1.1;
  color:var(--bone);text-shadow:2px 2px 0 rgba(3,8,6,.72);white-space:nowrap;
}
.brand-line{
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.14em;line-height:1.4;
  color:var(--mute);white-space:nowrap;
}
.head-lights{display:none}

.nav-toggle{
  display:inline-flex;align-items:center;gap:10px;
  min-height:44px;padding:8px 14px;
  border:2px solid var(--edge);border-radius:999px;
  background:var(--felt);color:var(--bone);
  box-shadow:4px 4px 0 var(--edge);
  font-weight:700;cursor:pointer;
  transition:transform .16s var(--ease),box-shadow .16s var(--ease),border-color .16s var(--ease);
}
.nav-toggle:hover{border-color:var(--cyan)}
.nav-toggle-bars{display:inline-flex;flex-direction:column;gap:3px}
.nav-toggle-bars i{display:block;width:18px;height:2px;border-radius:2px;background:var(--cyan);transition:transform .18s var(--ease),opacity .18s var(--ease)}
.nav-toggle-text{font-size:14px;letter-spacing:.08em}
.site-head[data-open] .nav-toggle{background:var(--cyan);color:#04211B;box-shadow:4px 4px 0 var(--edge)}
.site-head[data-open] .nav-toggle-bars i{background:#04211B}
.site-head[data-open] .nav-toggle-bars i:nth-child(1){transform:translateY(5px) rotate(45deg)}
.site-head[data-open] .nav-toggle-bars i:nth-child(2){opacity:0}
.site-head[data-open] .nav-toggle-bars i:nth-child(3){transform:translateY(-5px) rotate(-45deg)}

/* ===== 导航：移动端下行面板 ===== */
.site-nav{
  position:absolute;left:0;right:0;top:100%;
  display:grid;gap:14px;
  padding:16px var(--gutter) 22px;
  max-height:calc(100vh - var(--head-h) - 24px);
  overflow:auto;
  background:linear-gradient(180deg,var(--felt),var(--ink));
  border-top:2px solid rgba(22,224,198,.24);
  border-bottom:2px solid var(--edge);
  opacity:0;visibility:hidden;pointer-events:none;transform:translateY(-10px);
  transition:opacity .18s var(--ease),transform .18s var(--ease),visibility .18s var(--ease);
}
.site-head[data-open] .site-nav{opacity:1;visibility:visible;pointer-events:auto;transform:none}
.nav-list{display:grid;gap:8px;grid-template-columns:repeat(auto-fit,minmax(150px,1fr))}
.nav-item{display:block}
.nav-link{
  display:flex;align-items:center;gap:10px;
  padding:11px 15px;min-height:44px;
  border:2px solid var(--edge);border-radius:999px;
  background:rgba(244,241,232,.05);
  color:var(--bone);text-decoration:none;
  font-weight:700;font-size:15px;letter-spacing:.01em;
  transition:transform .16s var(--ease),background .16s var(--ease),color .16s var(--ease),border-color .16s var(--ease),box-shadow .16s var(--ease);
}
.nav-link:hover,.nav-link:focus-visible{border-color:var(--cyan);background:rgba(22,224,198,.14);color:var(--mist);transform:translateX(3px)}
.nav-idx{font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;color:var(--mute);transition:color .16s var(--ease)}
.nav-link[aria-current="page"]{
  background:var(--cyan);color:#04211B;border-color:var(--edge);
  box-shadow:4px 4px 0 rgba(3,8,6,.85);
}
.nav-link[aria-current="page"] .nav-idx{color:#04211B}
.nav-foot{display:grid;gap:8px}
.nav-cta{width:100%}

/* ===== 页头：桌面左侧悬浮机台 ===== */
@media (min-width:1024px){
  body{padding-top:0;padding-left:calc(var(--rail-w) + 42px)}
  .site-head{
    inset:18px auto 18px 18px;
    width:var(--rail-w);
    display:flex;flex-direction:column;
    border:2px solid var(--edge);border-radius:26px;
    background:linear-gradient(170deg,var(--felt-hi),#0A231C 58%,var(--ink));
    box-shadow:var(--shadow-hard),inset 0 0 0 2px rgba(22,224,198,.16);
  }
  .head-inner{
    flex-direction:column;align-items:stretch;justify-content:flex-start;
    gap:16px;height:100%;min-height:0;max-width:none;
    padding:20px 14px 18px;
    overflow-y:auto;scrollbar-width:thin;
  }
  .head-brand{flex-wrap:wrap;gap:10px}
  .brand-name{font-size:18px}
  .brand-line{white-space:normal}
  .head-lights{display:inline-flex;gap:6px;align-items:center;padding-left:2px}
  .head-lights i{width:9px;height:9px;border-radius:999px;border:2px solid var(--edge);background:var(--cyan);box-shadow:0 0 8px rgba(22,224,198,.7)}
  .head-lights i:nth-child(2){background:var(--orange);box-shadow:0 0 8px rgba(255,138,61,.7)}
  .head-lights i:nth-child(3){background:var(--amber);box-shadow:0 0 8px rgba(255,196,107,.6)}
  .nav-toggle{display:none}
  .site-nav{
    position:static;flex:1;
    display:flex;flex-direction:column;gap:14px;
    padding:0;max-height:none;overflow:visible;
    background:none;border:0;opacity:1;visibility:visible;pointer-events:auto;transform:none;
  }
  .nav-list{grid-template-columns:1fr;gap:6px}
  .nav-link{padding:10px 13px;font-size:14.5px}
  .nav-foot{margin-top:auto;gap:8px}
}

/* ===== 页脚 ===== */
.site-foot{
  position:relative;margin-top:72px;
  padding-top:44px;
  background:linear-gradient(180deg,#0B241D,var(--ink) 62%);
  border-top:2px solid var(--edge);
  box-shadow:inset 0 2px 0 rgba(22,224,198,.16);
  color:var(--bone);
}
.foot-inner{
  width:100%;max-width:1180px;margin:0 auto;
  padding:0 var(--gutter) 32px;
  display:grid;gap:30px;
}
.foot-brand{min-width:0}
.foot-eyebrow{
  margin:0 0 10px;
  font-family:var(--font-display);font-size:clamp(24px,3vw,30px);font-weight:800;letter-spacing:-.02em;
  color:var(--bone);text-shadow:3px 3px 0 rgba(3,8,6,.78);
}
.foot-summary{margin:0 0 18px;max-width:36ch;font-size:15px;line-height:1.75;color:var(--mute)}
.foot-cta{width:fit-content}
.foot-nav{display:grid;gap:26px;grid-template-columns:repeat(auto-fit,minmax(160px,1fr))}
.foot-heading{
  margin:0 0 12px;
  font-family:var(--font-mono);font-size:12px;font-weight:700;letter-spacing:.18em;text-transform:uppercase;
  color:var(--cyan);
}
.foot-links{display:grid;gap:8px}
.foot-links--plain{gap:10px}
.foot-link{
  display:inline-block;width:fit-content;
  font-size:15px;color:var(--bone);text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .16s var(--ease),border-color .16s var(--ease),transform .16s var(--ease);
}
.foot-link:hover,.foot-link:focus-visible{color:var(--cyan);border-bottom-color:var(--cyan);transform:translateX(2px)}
.foot-line{font-size:14px;line-height:1.7;color:var(--mute);max-width:34ch}
.foot-col--contact .foot-line{color:var(--mute)}
.foot-meta{
  width:100%;max-width:1180px;margin:0 auto;
  padding:18px var(--gutter) 28px;
  border-top:1px dashed rgba(138,168,160,.32);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:8px 22px;
  font-family:var(--font-mono);font-size:12.5px;letter-spacing:.05em;color:var(--mute);
}
.foot-copy,.foot-icp{margin:0;max-width:none}
@media (min-width:880px){
  .foot-inner{grid-template-columns:minmax(0,1fr) minmax(0,1.5fr);gap:44px;align-items:start}
}

/* ===== 显现动效 ===== */
[data-reveal]{transition:opacity .5s var(--ease),transform .5s var(--ease)}
html.reveal-ready [data-reveal]:not(.is-revealed){opacity:0;transform:translateY(16px)}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  [data-reveal]{opacity:1 !important;transform:none !important}
  .scan-progress-fill{transition:none}
  .nav-link:hover,.nav-link:focus-visible{transform:none}
  .media-frame::after{opacity:.4}
  .btn--primary:hover,.btn--primary:focus-visible{transform:none}
}