*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;min-height:100vh;background:var(--carbon);color:var(--paper);font-family:var(--font-sans);font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
ul,ol{margin:0;padding:0;list-style:none}
button{font-family:inherit}
#main-content{display:block;scroll-margin-top:110px}
:root{
  --signal:#FF5A1F;
  --signal-deep:#C93D0A;
  --ink:#063B34;
  --carbon:#121417;
  --cyan:#45F0E0;
  --paper:#F4F0E8;
  --glass:rgba(255,255,255,0.08);
  --glass-strong:rgba(255,255,255,0.14);
  --line:#2B3A36;
  --muted:#9BB0A9;
  --indigo:#241B4A;
  --wine:#4A1729;
  --font-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"IBM Plex Mono","JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --radius-pill:999px;
  --radius-lg:26px;
  --radius-md:16px;
  --radius-sm:10px;
  --wrap:1240px;
  --gutter:clamp(16px,4vw,40px);
  --shadow-float:0 22px 50px -30px #000;
  --ease:cubic-bezier(.22,.72,.28,1);
}
h1,h2,h3,h4{margin:0 0 .5em;font-family:var(--font-sans);font-weight:800;line-height:1.14;letter-spacing:-.015em}
h1{font-size:clamp(30px,5.4vw,64px);font-weight:900;letter-spacing:-.025em}
h2{font-size:clamp(24px,3.4vw,40px)}
h3{font-size:clamp(18px,2vw,22px)}
p{margin:0 0 1em}
a{color:inherit}
strong{font-weight:800}
::selection{background:var(--signal);color:var(--carbon)}

/* ---------- 基础布局 ---------- */
.container{width:100%;max-width:var(--wrap);margin-inline:auto;padding-inline:var(--gutter)}
.section{padding-block:clamp(40px,6vw,80px)}
.grid{display:grid;gap:clamp(16px,2.4vw,28px)}
.grid--split{grid-template-columns:minmax(0,7fr) minmax(0,5fr)}
.divider{height:1px;border:0;margin:clamp(24px,4vw,40px) 0;background:linear-gradient(90deg,rgba(69,240,224,.45),rgba(69,240,224,0))}
.eyebrow{display:inline-block;margin:0 0 12px;font-family:var(--font-mono);font-size:12px;font-weight:700;letter-spacing:.18em;text-transform:uppercase;color:var(--cyan)}
.tag{display:inline-flex;align-items:center;gap:6px;padding:5px 11px;border-radius:var(--radius-pill);border:1px solid rgba(244,240,232,.24);color:var(--paper);font-size:12px;font-weight:600;letter-spacing:.06em}
.tag--cyan{border-color:rgba(69,240,224,.45);color:var(--cyan)}
.tag--signal{background:var(--signal);border-color:transparent;color:var(--carbon);font-weight:800}
.prose{max-width:72ch;font-size:17px;line-height:1.78;color:rgba(244,240,232,.86)}
.prose p{margin:0 0 1.1em}
.prose--on-paper{color:#202624}
.card{position:relative;padding:clamp(18px,2.4vw,28px);border-radius:var(--radius-lg);border:1px solid rgba(43,58,54,.9);background:var(--carbon);color:var(--paper)}
.card--glass{background:var(--glass);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px)}
.card--paper{background:var(--paper);color:#1b201f;border-color:rgba(18,20,23,.14)}
.card--paper h2,.card--paper h3{color:#121417}

/* ---------- 图片容器基础规则 ---------- */
.media-frame{position:relative;display:block;width:100%;overflow:hidden;isolation:isolate;border-radius:var(--radius-lg);border:1px solid rgba(43,58,54,.9);background:linear-gradient(150deg,#0b2b26,#121417)}
.media-frame img{display:block;width:100%;height:100%;object-fit:cover;filter:contrast(1.06) saturate(.96)}
.media-frame::after{content:"";position:absolute;inset:0;pointer-events:none;opacity:.85;mix-blend-mode:screen;background:radial-gradient(120% 90% at 85% 8%,rgba(255,90,31,.26),rgba(255,90,31,0) 58%),repeating-linear-gradient(0deg,rgba(255,255,255,.045) 0 1px,rgba(255,255,255,0) 1px 3px)}
.media-frame--cover{aspect-ratio:16/9}
.media-frame--portrait{aspect-ratio:3/4}
.media-frame--tall{aspect-ratio:4/5}
.media-frame--square{aspect-ratio:1/1}
.media-frame--thumb{border-radius:var(--radius-md)}
.media-caption{margin:10px 0 0;font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--muted)}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 20px;border:1px solid transparent;border-radius:var(--radius-pill);font-size:14px;font-weight:700;line-height:1.2;letter-spacing:.02em;text-decoration:none;cursor:pointer;transition:transform .18s var(--ease),background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease)}
.btn:focus-visible{outline:2px solid var(--cyan);outline-offset:3px}
.btn-signal{background:var(--signal);color:var(--carbon);box-shadow:0 10px 24px -14px var(--signal)}
.btn-signal:hover{background:#ff7241;transform:translateY(-1px)}
.btn-ghost{background:var(--glass);border-color:rgba(244,240,232,.22);color:var(--paper)}
.btn-ghost:hover{background:var(--glass-strong);border-color:var(--cyan);color:#fff}
.btn-sm{padding:8px 15px;font-size:13px}
.btn-block{display:flex;width:100%}

/* ---------- 面包屑 ---------- */
.breadcrumbs{margin:clamp(18px,3vw,28px) 0 0;font-family:var(--font-mono);font-size:13px;letter-spacing:.06em}
.breadcrumbs-list{display:flex;flex-wrap:wrap;align-items:center;gap:8px;color:var(--muted)}
.breadcrumbs-item{display:inline-flex;align-items:center;gap:8px}
.breadcrumbs-link{color:var(--muted);text-decoration:none;border-bottom:1px solid transparent;transition:color .18s,border-color .18s}
.breadcrumbs-link:hover,.breadcrumbs-link:focus-visible{color:var(--cyan);border-bottom-color:rgba(69,240,224,.5)}
.breadcrumbs-current{color:var(--paper);font-weight:600}
.breadcrumbs-sep{color:rgba(155,176,169,.55)}

/* ---------- 手风琴 ---------- */
.accordion{display:grid;gap:10px}
.accordion-item{border:1px solid rgba(43,58,54,.9);border-radius:var(--radius-md);background:rgba(18,20,23,.72);overflow:hidden;transition:border-color .2s var(--ease),background .2s var(--ease)}
.accordion-item[data-open]{border-color:rgba(255,90,31,.55);background:rgba(6,59,52,.5)}
.accordion-trigger{display:flex;align-items:center;justify-content:space-between;gap:16px;width:100%;padding:16px 18px;border:0;background:transparent;color:var(--paper);font-size:16px;font-weight:700;line-height:1.5;text-align:left;cursor:pointer}
.accordion-trigger:focus-visible{outline:2px solid var(--cyan);outline-offset:-3px}
.accordion-trigger::after{content:"+";font-family:var(--font-mono);font-size:20px;font-weight:700;color:var(--signal);transition:transform .22s var(--ease)}
.accordion-item[data-open] .accordion-trigger::after{transform:rotate(45deg)}
.accordion-panel{display:grid;grid-template-rows:0fr;transition:grid-template-rows .22s var(--ease)}
.accordion-item[data-open] .accordion-panel{grid-template-rows:1fr}
.accordion-body{overflow:hidden;padding:0 18px;font-size:15px;line-height:1.75;color:rgba(244,240,232,.82)}
.accordion-item[data-open] .accordion-body{padding-bottom:18px}

/* ---------- 跳过链接 ---------- */
.skip-link{position:fixed;top:8px;left:8px;z-index:200;padding:10px 18px;border-radius:var(--radius-pill);background:var(--signal);color:var(--carbon);font-size:14px;font-weight:800;text-decoration:none;transform:translateY(-160%);transition:transform .2s var(--ease)}
.skip-link:focus-visible{transform:translateY(0);outline:2px solid var(--cyan);outline-offset:3px}

/* ---------- 头部：悬浮胶囊浮岛 ---------- */
.site-header{position:sticky;top:0;z-index:90;padding:clamp(10px,1.6vw,18px) clamp(10px,2.4vw,28px) 0;transition:padding .25s var(--ease)}
.scroll-meter{position:fixed;top:0;left:0;right:0;height:3px;z-index:120;pointer-events:none;background:rgba(43,58,54,.35)}
.scroll-meter-fill{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--signal),var(--cyan));box-shadow:0 0 12px rgba(255,90,31,.55);transition:width .1s linear}
.header-shell{position:relative;display:flex;align-items:center;gap:clamp(10px,2vw,24px);width:100%;max-width:var(--wrap);margin-inline:auto;padding:9px 10px 9px 14px;border:1px solid rgba(43,58,54,.9);border-radius:var(--radius-pill);background:linear-gradient(120deg,rgba(18,20,23,.86),rgba(6,59,52,.78));box-shadow:var(--shadow-float);backdrop-filter:blur(18px) saturate(150%);-webkit-backdrop-filter:blur(18px) saturate(150%);transition:max-width .3s var(--ease),padding .3s var(--ease),background .3s var(--ease),box-shadow .3s var(--ease)}
.site-header[data-scrolled] .header-shell{max-width:1120px;padding-block:6px;background:linear-gradient(120deg,rgba(18,20,23,.95),rgba(6,59,52,.92));box-shadow:0 18px 40px -28px #000,0 0 0 1px rgba(69,240,224,.1)}
.brand{display:inline-flex;align-items:center;gap:11px;text-decoration:none;color:var(--paper);flex:none}
.brand:focus-visible{outline:2px solid var(--cyan);outline-offset:6px;border-radius:14px}
.brand-mark{display:inline-flex;align-items:flex-end;justify-content:center;gap:3px;width:38px;height:38px;padding:9px 8px;flex:none;border-radius:11px;background:linear-gradient(145deg,var(--signal),var(--signal-deep));box-shadow:0 10px 20px -12px var(--signal)}
.brand-mark-bar{display:block;width:4px;height:11px;border-radius:2px;background:var(--carbon)}
.brand-mark-bar:nth-child(2){height:17px}
.brand-mark-bar:nth-child(3){height:8px}
.brand-text{display:flex;flex-direction:column;gap:1px;min-width:0}
.brand-name{font-size:15px;font-weight:900;letter-spacing:.02em;line-height:1.2;white-space:nowrap}
.brand-tagline{display:block;max-height:20px;overflow:hidden;font-family:var(--font-mono);font-size:10.5px;letter-spacing:.1em;color:var(--muted);line-height:1.5;white-space:nowrap;transition:max-height .2s var(--ease),opacity .2s var(--ease)}
.site-header[data-scrolled] .brand-tagline{max-height:0;opacity:0}
.nav{display:flex;align-items:center;gap:6px;margin-inline:auto}
.nav-list{display:flex;align-items:center;gap:2px}
.nav-item{display:block}
.nav-link{display:inline-block;padding:8px 13px;border-radius:var(--radius-pill);color:rgba(244,240,232,.76);font-size:14px;font-weight:500;line-height:1.4;text-decoration:none;white-space:nowrap;transition:color .18s var(--ease),background .18s var(--ease),box-shadow .18s var(--ease)}
.nav-link:hover{color:var(--paper);background:var(--glass)}
.nav-link:focus-visible{outline:2px solid var(--cyan);outline-offset:2px}
.nav-link[aria-current="page"]{color:#fff;background:rgba(255,90,31,.18);box-shadow:inset 0 0 0 1px rgba(255,90,31,.55)}
.nav-cta{display:none;text-decoration:none}
.header-actions{display:flex;align-items:center;gap:8px;flex:none}
.nav-toggle{display:none;align-items:center;gap:8px;padding:9px 14px;border:1px solid rgba(255,90,31,.45);border-radius:var(--radius-pill);background:rgba(255,90,31,.14);color:var(--paper);font-size:13px;font-weight:800;letter-spacing:.04em;cursor:pointer;transition:background .18s var(--ease),border-color .18s var(--ease)}
.nav-toggle:hover{background:rgba(255,90,31,.26)}
.nav-toggle:focus-visible{outline:2px solid var(--cyan);outline-offset:3px}
.nav-toggle-bars{display:inline-flex;flex-direction:column;gap:4px;width:16px}
.nav-toggle-bar{display:block;height:2px;width:100%;border-radius:2px;background:var(--signal);transition:transform .2s var(--ease)}
.site-header[data-open] .nav-toggle-bar:first-child{transform:translateY(3px) rotate(45deg)}
.site-header[data-open] .nav-toggle-bar:last-child{transform:translateY(-3px) rotate(-45deg)}
.nav-toggle-text{line-height:1}

/* ---------- 页脚：墨绿沉井 + 珠宝色联络带 ---------- */
.site-footer{position:relative;overflow:hidden;margin-top:clamp(48px,7vw,96px);border-top:1px solid rgba(69,240,224,.14);background:linear-gradient(160deg,var(--ink) 0%,#04241f 46%,var(--carbon) 100%);color:var(--paper)}
.footer-glow{position:absolute;right:-10%;bottom:-40%;width:min(620px,80vw);aspect-ratio:1;pointer-events:none;background:radial-gradient(circle,rgba(255,90,31,.22),rgba(255,90,31,0) 62%);filter:blur(10px);animation:breathe 9s ease-in-out infinite}
@keyframes breathe{0%,100%{opacity:.55;transform:scale(.94)}50%{opacity:1;transform:scale(1.06)}}
.footer-inner{position:relative;display:grid;gap:clamp(28px,4vw,56px);width:100%;max-width:var(--wrap);margin-inline:auto;padding:clamp(40px,6vw,72px) var(--gutter) 0}
.footer-lead{min-width:0}
.brand--footer .brand-name{font-size:16px}
.footer-motto{margin:18px 0 0;max-width:22ch;font-size:clamp(18px,2.2vw,24px);font-weight:800;line-height:1.36;letter-spacing:-.01em;color:var(--paper)}
.footer-tags{display:flex;flex-wrap:wrap;gap:8px;margin:18px 0 0}
.footer-tag{padding:5px 10px;border:1px solid rgba(69,240,224,.3);border-radius:var(--radius-pill);font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;color:rgba(69,240,224,.9)}
.footer-nav{display:grid;gap:clamp(20px,3vw,36px);grid-template-columns:repeat(auto-fit,minmax(150px,1fr))}
.footer-col{min-width:0}
.footer-col-title{margin:0 0 14px;font-family:var(--font-mono);font-size:12px;font-weight:700;letter-spacing:.16em;text-transform:uppercase;color:var(--cyan)}
.footer-links{display:grid;gap:10px}
.footer-link{display:inline-block;font-size:15px;color:rgba(244,240,232,.78);text-decoration:none;border-bottom:1px solid transparent;transition:color .18s var(--ease),border-color .18s var(--ease)}
.footer-link:hover{color:#fff;border-bottom-color:var(--signal)}
.footer-link:focus-visible{outline:2px solid var(--cyan);outline-offset:3px}
.footer-contact{position:relative;display:grid;gap:18px;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));width:100%;max-width:var(--wrap);margin:clamp(28px,4vw,44px) auto 0;padding:clamp(20px,3vw,28px) var(--gutter);border-top:1px solid rgba(69,240,224,.16);border-bottom:1px solid rgba(69,240,224,.16);background:linear-gradient(90deg,rgba(74,23,41,.55),rgba(36,27,74,.4))}
.contact-item{display:grid;gap:4px;min-width:0}
.contact-label{font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
.contact-value{font-size:15px;font-weight:600;line-height:1.55;color:var(--paper);overflow-wrap:anywhere}
.contact-item--phone .contact-value{font-family:var(--font-mono);font-size:19px;font-weight:700;letter-spacing:.04em;color:var(--signal)}
.footer-service{grid-column:1/-1;margin:0;padding-top:12px;border-top:1px dashed rgba(69,240,224,.22);font-size:13px;line-height:1.7;color:rgba(244,240,232,.7)}
.footer-base{position:relative;display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;width:100%;max-width:var(--wrap);margin-inline:auto;padding:20px var(--gutter) clamp(28px,4vw,40px);font-size:13px;color:var(--muted)}
.footer-legal,.footer-icp{margin:0;font-family:var(--font-mono);letter-spacing:.04em}

/* ---------- 显现 ---------- */
.has-js [data-reveal]{opacity:0;transform:translateY(16px);transition:opacity .5s var(--ease),transform .5s var(--ease);transition-delay:calc(var(--reveal-i,0) * 60ms)}
.has-js [data-reveal].is-visible{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (min-width:760px){
  .footer-inner{grid-template-columns:minmax(240px,.85fr) minmax(0,1.6fr);align-items:start}
  .grid--split{grid-template-columns:minmax(0,7fr) minmax(0,5fr)}
}
@media (max-width:960px){
  .site-header{padding-top:8px}
  .brand-tagline{display:none}
  .header-cta{display:none}
  .nav-toggle{display:inline-flex}
  .header-shell{gap:10px;padding:8px 8px 8px 12px;border-radius:24px}
  .site-header[data-scrolled] .header-shell{max-width:100%;border-radius:22px}
  .nav{position:absolute;top:calc(100% + 10px);left:0;right:0;z-index:5;flex-direction:column;align-items:stretch;gap:10px;margin:0;padding:14px;max-height:min(72vh,540px);overflow-y:auto;border:1px solid var(--line);border-radius:24px;background:linear-gradient(160deg,rgba(18,20,23,.98),rgba(6,59,52,.96));box-shadow:var(--shadow-float);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);opacity:0;visibility:hidden;transform:translateY(-8px);pointer-events:none;transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s var(--ease)}
  .site-header[data-open] .nav{opacity:1;visibility:visible;transform:none;pointer-events:auto}
  .nav-list{flex-direction:column;align-items:stretch;gap:2px}
  .nav-item{width:100%}
  .nav-link{display:block;padding:12px 14px;border-radius:14px;font-size:15px;color:rgba(244,240,232,.86)}
  .nav-link[aria-current="page"]{background:rgba(255,90,31,.22);box-shadow:inset 0 0 0 1px rgba(255,90,31,.6)}
  .nav-cta{display:flex;align-items:center;justify-content:center;padding:12px 16px;border-radius:14px;background:var(--signal);color:var(--carbon);font-size:15px;font-weight:800}
  .nav-cta:hover{background:#ff7241}
  .footer-motto{max-width:none}
}
@media (max-width:640px){
  body{font-size:15.5px}
  .grid--split{grid-template-columns:minmax(0,1fr)}
  .footer-contact{grid-template-columns:minmax(0,1fr)}
  .footer-base{flex-direction:column;gap:6px}
  .contact-item--phone .contact-value{font-size:17px}
  .nav-toggle-text{display:none}
  .nav-toggle{padding:10px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}
  .has-js [data-reveal]{opacity:1;transform:none}
  .footer-glow{animation:none;opacity:.8}
}