/* ============ 01. 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,figure,blockquote,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
button{font:inherit;color:inherit}
a{color:inherit}
table{border-collapse:collapse;width:100%}

/* ============ 02. Tokens ============ */
:root{
  --deep-sea:#061B2E;
  --ocean:#0B2C4A;
  --gold:#F2C14E;
  --gold-bright:#FFD97A;
  --coral:#FF6B4A;
  --coral-ink:#B23E1C;
  --jade:#1FAE8A;
  --cyan:#35D0DE;
  --paper:#F5EEDC;
  --ink:#12324D;
  --mist:#8FA6B8;
  --violet:#5B4BC4;

  --shell:1180px;
  --gutter:clamp(18px,4vw,40px);
  --radius:3px;

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

  --line-gold:rgba(242,193,78,.5);
  --line-soft:rgba(143,166,184,.3);
  --paper-ink:#2A4A63;
}

/* ============ 03. Base ============ */
body{
  min-height:100vh;
  background-color:var(--deep-sea);
  background-image:
    radial-gradient(circle at 12% -10%,rgba(53,208,222,.12),transparent 42%),
    radial-gradient(circle at 88% 8%,rgba(242,193,78,.10),transparent 40%),
    linear-gradient(180deg,#04121f 0%,var(--deep-sea) 46%,#08233b 100%);
  background-attachment:fixed;
  color:var(--paper);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
::selection{background:var(--gold);color:var(--deep-sea)}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:2px}
.shell{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:var(--gutter)}
.page-main{display:block}

/* ============ 04. Skip link ============ */
.skip-link{
  position:absolute;left:12px;top:-72px;z-index:200;
  padding:10px 18px;border-radius:2px;
  background:var(--gold);color:var(--deep-sea);
  font-weight:800;font-size:14px;letter-spacing:.06em;text-decoration:none;
  transition:top .2s ease;
}
.skip-link:focus{top:12px}

/* ============ 05. Buttons ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.45em;
  padding:11px 20px;border:1px solid transparent;border-radius:2px;
  font-family:var(--font-body);font-size:15px;font-weight:800;line-height:1.2;letter-spacing:.05em;
  text-decoration:none;cursor:pointer;
  transition:transform .18s ease,background-color .18s ease,color .18s ease,border-color .18s ease,box-shadow .18s ease;
}
.btn--coral{background:var(--coral);border-color:var(--coral);color:var(--deep-sea);box-shadow:0 10px 22px -14px rgba(255,107,74,.95)}
.btn--coral:hover{background:var(--gold-bright);border-color:var(--gold);color:var(--deep-sea);transform:translateY(-1px)}
.btn--gold{background:var(--gold);border-color:var(--gold);color:var(--deep-sea)}
.btn--gold:hover{background:var(--gold-bright);border-color:var(--gold-bright);color:var(--deep-sea);transform:translateY(-1px)}
.btn--ghost{background:rgba(6,27,46,.35);border-color:rgba(242,193,78,.6);color:var(--paper)}
.btn--ghost:hover{border-color:var(--gold-bright);color:var(--gold-bright);background:rgba(242,193,78,.1);transform:translateY(-1px)}
.btn--sm{padding:7px 14px;font-size:13px;letter-spacing:.08em}
.btn--block{width:100%}

/* ============ 06. Header ============ */
.site-header{
  position:relative;isolation:isolate;
  background:linear-gradient(180deg,#04121f 0%,#0B2C4A 62%,#08233b 100%);
  border-bottom:2px solid var(--line-gold);
  box-shadow:0 30px 70px -50px #000;
}
.site-header::before{
  content:"";position:absolute;inset:0;z-index:-1;opacity:.55;
  background-image:
    linear-gradient(rgba(53,208,222,.07) 1px,transparent 1px),
    linear-gradient(90deg,rgba(53,208,222,.07) 1px,transparent 1px);
  background-size:56px 56px;
  pointer-events:none;
}
.scroll-progress{position:fixed;top:0;left:0;right:0;height:3px;z-index:90;background:rgba(6,27,46,.6);pointer-events:none}
.scroll-progress__bar{display:block;width:0;height:100%;background:linear-gradient(90deg,var(--cyan),var(--gold),var(--coral));box-shadow:0 0 14px rgba(242,193,78,.75)}

.header-strip{background:rgba(4,18,31,.62);border-bottom:1px dashed rgba(143,166,184,.32)}
.header-strip__inner{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:48px;padding-block:6px}
.header-strip__meta{display:inline-flex;align-items:center;gap:9px;font-family:var(--font-mono);font-size:12px;letter-spacing:.2em;color:var(--mist)}
.header-strip__dot{width:7px;height:7px;border-radius:50%;background:var(--jade);box-shadow:0 0 0 3px rgba(31,174,138,.2)}
.header-strip__actions{display:flex;align-items:center;gap:10px}

.masthead{
  position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;
  text-align:center;
  padding-block:clamp(20px,3.2vw,32px) clamp(14px,2.2vw,22px);
}
.masthead__brand{
  display:inline-flex;align-items:center;gap:clamp(12px,2vw,20px);
  text-decoration:none;color:var(--paper);
}
.masthead__coin{
  display:grid;place-items:center;flex:none;
  width:clamp(44px,6vw,58px);aspect-ratio:1;border-radius:50%;
  background:radial-gradient(circle at 34% 28%,#FFEFB8,var(--gold) 58%,#C08C1F 100%);
  color:#3A2405;
  font-family:var(--font-display);font-weight:900;font-size:clamp(20px,2.6vw,26px);line-height:1;
  box-shadow:inset 0 0 0 2px rgba(6,27,46,.35),0 0 26px rgba(242,193,78,.45);
}
.masthead__type{display:flex;flex-direction:column;align-items:flex-start;gap:5px;text-align:left}
.masthead__word{
  font-family:var(--font-display);font-weight:900;
  font-size:clamp(28px,5.2vw,46px);line-height:1.05;letter-spacing:.06em;
  color:var(--paper);
  -webkit-text-stroke:1px rgba(242,193,78,.9);
  text-shadow:0 0 22px rgba(242,193,78,.35);
}
.masthead__tag{font-size:12px;letter-spacing:.32em;color:var(--mist)}
.masthead__tick{
  position:absolute;top:50%;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.34em;
  color:rgba(143,166,184,.78);writing-mode:vertical-rl;white-space:nowrap;
}
.masthead__tick--left{left:4px;transform:translateY(-50%) rotate(180deg)}
.masthead__tick--right{right:4px;transform:translateY(-50%)}

.nav-shell{
  position:relative;display:flex;justify-content:center;
  border-top:1px solid rgba(242,193,78,.26);
}
.site-nav{display:block;width:100%}
.nav-list{display:flex;flex-wrap:wrap;align-items:stretch;justify-content:center;gap:clamp(2px,1.6vw,14px)}
.nav-list__item{display:flex}
.nav-list__item a{
  position:relative;display:inline-flex;align-items:baseline;gap:7px;
  padding:14px 10px 15px;
  color:rgba(245,238,220,.82);
  font-size:15px;font-weight:700;letter-spacing:.08em;text-decoration:none;
  transition:color .18s ease;
}
.nav-list__label{letter-spacing:.08em}
.nav-list__num{font-family:var(--font-mono);font-size:10px;letter-spacing:.06em;color:rgba(143,166,184,.85);transition:color .18s ease}
.nav-list__item a::after{
  content:"";position:absolute;left:10px;right:10px;bottom:5px;height:2px;
  background:linear-gradient(90deg,var(--gold),var(--gold-bright));
  box-shadow:0 0 12px rgba(242,193,78,.6);
  transform:scaleX(0);transform-origin:left;transition:transform .22s ease;
}
.nav-list__item a:hover{color:var(--gold-bright)}
.nav-list__item a:hover::after{transform:scaleX(1)}
.nav-list__item a[aria-current="page"]{color:var(--gold-bright)}
.nav-list__item a[aria-current="page"]::after{transform:scaleX(1)}
.nav-list__item a[aria-current="page"] .nav-list__num{color:var(--coral)}

.nav-toggle{
  display:none;align-items:center;justify-content:space-between;gap:12px;
  width:100%;padding:14px 2px;
  background:none;border:0;cursor:pointer;color:var(--paper);
}
.nav-toggle__label{font-size:13px;font-weight:700;letter-spacing:.3em;color:var(--mist)}
.nav-toggle__bars{display:inline-flex;flex-direction:column;gap:4px;width:24px}
.nav-toggle__bars span{display:block;height:2px;border-radius:2px;background:var(--gold);transition:transform .2s ease,opacity .2s ease,width .2s ease}
.nav-toggle__bars span:nth-child(2){width:70%;align-self:flex-end}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(3){transform:translateY(-6px) rotate(-45deg);width:100%}

/* ============ 07. Footer ============ */
.site-footer{
  position:relative;overflow:hidden;
  margin-top:clamp(48px,8vw,96px);
  padding-block:clamp(38px,6vw,72px) 24px;
  background:linear-gradient(180deg,#08233b 0%,#04121f 100%);
  border-top:2px solid var(--line-gold);
  color:var(--paper);
}
.site-footer::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    radial-gradient(circle at 16% 8%,rgba(53,208,222,.14),transparent 46%),
    radial-gradient(circle at 86% 0%,rgba(242,193,78,.16),transparent 44%);
}
.site-footer .shell{position:relative;z-index:1}

.footer-sheet{
  position:relative;
  padding:clamp(22px,3.4vw,40px);
  background:var(--paper);
  color:var(--ink);
  border:2px solid rgba(11,44,74,.9);
  border-radius:var(--radius);
  box-shadow:
    6px 6px 0 rgba(242,193,78,.3),
    12px 12px 0 rgba(53,208,222,.14),
    0 32px 60px -44px #000;
}
.footer-sheet::before{
  content:"服务台 · INDEX";
  position:absolute;top:-12px;left:22px;
  padding:2px 10px;
  background:var(--deep-sea);color:var(--gold-bright);
  border:1px solid rgba(242,193,78,.65);
  font-family:var(--font-mono);font-size:10px;letter-spacing:.26em;line-height:1.8;
}
.footer-sheet__head{
  display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;gap:6px 20px;
  padding-bottom:16px;border-bottom:2px solid rgba(18,50,77,.85);
}
.footer-brand__line{
  font-family:var(--font-display);font-weight:800;
  font-size:clamp(17px,2.2vw,21px);letter-spacing:.04em;color:var(--ink);
}
.footer-brand__tag{font-size:12px;letter-spacing:.28em;color:#5A7A95}

.footer-columns{
  display:grid;grid-template-columns:1.35fr .8fr 1fr;
  gap:clamp(20px,3vw,40px);
  padding-top:22px;
}
.footer-col{min-width:0}
.footer-col__title{
  display:flex;align-items:center;gap:8px;
  margin-bottom:12px;
  font-size:12px;font-weight:800;letter-spacing:.26em;color:#2F5B7C;
}
.footer-col__title::before{content:"";width:14px;height:2px;background:var(--coral-ink)}
.footer-note{max-width:40ch;font-size:13px;line-height:1.85;color:#3B5A74}
.footer-seal{
  display:inline-grid;place-items:center;
  margin-top:16px;width:62px;height:62px;
  border:2px solid var(--coral-ink);border-radius:4px;
  color:var(--coral-ink);
  font-family:var(--font-display);font-weight:900;font-size:16px;line-height:1.15;letter-spacing:.08em;
  transform:rotate(-6deg);opacity:.92;
}
.footer-links,.footer-legal{display:flex;flex-direction:column;gap:2px}
.footer-legal{margin-top:14px;padding-top:12px;border-top:1px dashed rgba(18,50,77,.3)}
.footer-links a,.footer-legal a{
  display:inline-block;
  padding:4px 0;
  color:var(--ink);font-size:14px;text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .18s ease,border-color .18s ease;
}
.footer-links a:hover,.footer-legal a:hover{color:var(--coral-ink);border-bottom-color:currentColor}
.footer-contact{display:flex;flex-direction:column;gap:6px}
.footer-contact li{display:flex;flex-wrap:wrap;gap:8px;align-items:baseline;font-size:13.5px;line-height:1.7;color:var(--paper-ink)}
.footer-contact__key{
  flex:none;min-width:34px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;
  color:#5A7A95;text-transform:uppercase;
}
.footer-base{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:8px 24px;
  margin-top:clamp(18px,3vw,28px);padding-top:16px;
  border-top:1px solid rgba(143,166,184,.28);
  font-size:12px;letter-spacing:.06em;color:var(--mist);
}
.footer-base__icp{font-family:var(--font-mono);letter-spacing:.04em;color:rgba(245,238,220,.82)}
.footer-base__meta{color:rgba(143,166,184,.9)}

/* ============ 08. Structure components ============ */
.breadcrumbs{padding-block:14px}
.breadcrumbs ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.breadcrumbs li{display:flex;align-items:center;gap:8px;font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;color:var(--mist)}
.breadcrumbs li+li::before{content:"/";color:rgba(242,193,78,.6)}
.breadcrumbs a{color:rgba(245,238,220,.78);text-decoration:none;border-bottom:1px solid transparent;transition:color .18s ease,border-color .18s ease}
.breadcrumbs a:hover{color:var(--cyan);border-bottom-color:currentColor}
.breadcrumbs [aria-current="page"]{color:var(--gold-bright)}

.section{padding-block:clamp(32px,5vw,60px)}
.section--paper{background:var(--paper);color:var(--ink)}
.eyebrow{
  display:inline-flex;align-items:center;gap:9px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.3em;color:var(--gold);
}
.eyebrow::before{content:"";width:22px;height:1px;background:currentColor;opacity:.7}
.section-title{
  margin-top:10px;
  font-family:var(--font-display);font-weight:900;
  font-size:clamp(26px,4vw,40px);line-height:1.2;letter-spacing:.03em;
  color:var(--paper);
}
.section-title--ink{color:var(--ink)}
.lede{max-width:62ch;margin-top:14px;font-size:17px;line-height:1.8;color:rgba(245,238,220,.84)}
.lede--ink{color:var(--paper-ink)}
.prose{max-width:68ch;font-size:17px;line-height:1.85;color:rgba(245,238,220,.9)}
.prose p+p{margin-top:16px}
.prose--ink{color:var(--paper-ink)}
.rule-ticks{
  display:block;height:10px;opacity:.7;
  background-image:repeating-linear-gradient(90deg,rgba(242,193,78,.55) 0 1px,transparent 1px 12px);
}

/* ============ 09. Cards / data / media ============ */
.card-paper{
  position:relative;
  padding:clamp(18px,2.4vw,28px);
  background:var(--paper);color:var(--ink);
  border:2px solid rgba(18,50,77,.85);border-radius:var(--radius);
  box-shadow:5px 5px 0 rgba(242,193,78,.22),0 26px 44px -36px #000;
}
.card-paper--dark{
  background:linear-gradient(160deg,rgba(11,44,74,.96),rgba(6,27,46,.99));
  color:var(--paper);
  border-color:rgba(242,193,78,.45);
  box-shadow:5px 5px 0 rgba(53,208,222,.14),0 26px 44px -36px #000;
}
@media (hover:hover){
  .card-paper{transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease}
  .card-paper:hover{
    transform:translateY(-4px);
    border-color:var(--gold);
    box-shadow:6px 10px 0 rgba(242,193,78,.28),0 32px 52px -38px #000;
  }
  .card-paper--dark:hover{border-color:var(--gold-bright);box-shadow:6px 10px 0 rgba(53,208,222,.2),0 32px 52px -38px #000}
}
.stat{display:flex;flex-direction:column;gap:2px}
.stat__num{
  font-family:var(--font-mono);font-weight:700;
  font-size:clamp(28px,4.6vw,44px);line-height:1.05;letter-spacing:-.01em;
  color:var(--gold-bright);font-variant-numeric:tabular-nums;
}
.stat__label{font-size:12px;letter-spacing:.22em;color:var(--mist)}
.stat--jade .stat__num{color:#4EE0B6}
.stat--ink .stat__num{color:var(--ink)}
.stat--ink .stat__label{color:#5A7A95}
.media-frame{
  position:relative;display:block;overflow:hidden;
  aspect-ratio:16/10;
  border:2px solid rgba(242,193,78,.45);border-radius:var(--radius);
  background:linear-gradient(150deg,rgba(53,208,222,.18),rgba(6,27,46,.92));
}
.media-frame img,.media-frame svg{width:100%;height:100%;object-fit:cover}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--square{aspect-ratio:1}
.media-frame--tall{aspect-ratio:4/5}
.media-frame figcaption{
  position:absolute;left:0;right:0;bottom:0;
  padding:10px 12px;
  font-size:11px;letter-spacing:.16em;color:var(--paper);
  background:linear-gradient(180deg,transparent,rgba(4,18,31,.92));
}

/* ============ 10. Tags, chips, notices ============ */
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 10px;border-radius:999px;
  border:1px solid rgba(242,193,78,.55);background:rgba(242,193,78,.1);
  color:var(--gold-bright);font-size:12px;font-weight:700;line-height:1.7;letter-spacing:.1em;
}
.tag--jade{border-color:rgba(31,174,138,.6);background:rgba(31,174,138,.14);color:#7DF0CE}
.tag--coral{border-color:rgba(255,107,74,.6);background:rgba(255,107,74,.14);color:#FFB7A4}
.tag--violet{border-color:rgba(91,75,196,.66);background:rgba(91,75,196,.18);color:#C3BAFF}
.tag--ink{border-color:rgba(18,50,77,.4);background:rgba(18,50,77,.08);color:var(--ink)}
.chip{
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 16px;border-radius:2px;
  border:1px solid rgba(143,166,184,.45);background:rgba(11,44,74,.65);
  color:rgba(245,238,220,.86);
  font-size:14px;font-weight:700;letter-spacing:.06em;cursor:pointer;
  transition:background-color .18s ease,color .18s ease,border-color .18s ease,box-shadow .18s ease;
}
.chip:hover{border-color:var(--gold);color:var(--gold-bright)}
.chip[aria-pressed="true"]{background:var(--gold);border-color:var(--gold);color:var(--deep-sea);box-shadow:0 0 0 3px rgba(242,193,78,.18)}
.notice{
  display:flex;gap:12px;
  padding:14px 16px;
  border:1px solid rgba(53,208,222,.45);border-left:4px solid var(--cyan);border-radius:2px;
  background:rgba(53,208,222,.1);
  font-size:14px;line-height:1.75;color:rgba(245,238,220,.92);
}
.notice--gold{border-color:rgba(242,193,78,.45);border-left-color:var(--gold);background:rgba(242,193,78,.1)}

/* ============ 11. Index, back-to-top, reveal ============ */
.section-index{position:sticky;top:16px}
.section-index ol{display:flex;flex-direction:column;gap:2px}
.section-index a{
  display:flex;align-items:baseline;gap:10px;
  padding:9px 12px;
  border-left:2px solid rgba(143,166,184,.3);
  color:rgba(245,238,220,.72);
  font-size:14px;font-weight:600;letter-spacing:.05em;text-decoration:none;
  transition:color .18s ease,border-color .18s ease,background-color .18s ease;
}
.section-index a:hover{color:var(--cyan);border-left-color:var(--cyan)}
.section-index a[aria-current="true"]{color:var(--gold-bright);border-left-color:var(--gold);background:rgba(242,193,78,.09)}
.section-index__num{font-family:var(--font-mono);font-size:11px;color:var(--mist)}
.back-to-top{
  position:fixed;right:clamp(14px,3vw,28px);bottom:clamp(14px,3vw,28px);z-index:80;
  display:inline-flex;flex-direction:column;align-items:center;gap:2px;
  padding:10px 13px;
  border:1px solid rgba(242,193,78,.6);border-radius:var(--radius);
  background:rgba(6,27,46,.92);
  color:var(--gold-bright);
  font-size:11px;font-weight:700;letter-spacing:.2em;cursor:pointer;
  opacity:0;transform:translateY(12px);pointer-events:none;
  transition:opacity .25s ease,transform .25s ease,border-color .2s ease,box-shadow .2s ease;
}
.back-to-top[data-visible]{opacity:1;transform:none;pointer-events:auto}
.back-to-top:hover{border-color:var(--gold-bright);box-shadow:0 0 22px rgba(242,193,78,.32)}
[data-reveal]{transition:opacity .6s ease,transform .6s ease}
.has-js [data-reveal]{opacity:0;transform:translateY(18px)}
.has-js [data-reveal].is-visible{opacity:1;transform:none}

/* ============ 12. Grid helpers ============ */
.grid{display:grid;gap:clamp(14px,2vw,24px)}
.grid--bento{grid-template-columns:repeat(12,1fr);align-items:start}
.grid--two{grid-template-columns:repeat(2,1fr)}
.grid--three{grid-template-columns:repeat(3,1fr)}
.span-3{grid-column:span 3}
.span-4{grid-column:span 4}
.span-5{grid-column:span 5}
.span-6{grid-column:span 6}
.span-7{grid-column:span 7}
.span-8{grid-column:span 8}
.span-12{grid-column:span 12}

/* ============ 13. Framed hero ============ */
.frame-hero{
  position:relative;
  padding:clamp(20px,3.4vw,44px);
  border:2px solid rgba(242,193,78,.5);border-radius:4px;
  background:linear-gradient(160deg,rgba(11,44,74,.92),rgba(6,27,46,.98));
  box-shadow:inset 0 0 0 1px rgba(53,208,222,.16),0 34px 60px -48px #000;
}
.frame-hero::before,.frame-hero::after{
  content:"";position:absolute;width:34px;height:34px;pointer-events:none;
  border:1px solid rgba(242,193,78,.75);
}
.frame-hero::before{top:-1px;left:-1px;border-right:0;border-bottom:0}
.frame-hero::after{right:-1px;bottom:-1px;border-left:0;border-top:0}

/* ============ 14. Responsive ============ */
@media (max-width:1000px){
  .masthead__tick{display:none}
  .masthead__type{align-items:center;text-align:center}
}
@media (max-width:880px){
  .nav-shell{flex-direction:column;align-items:stretch;justify-content:flex-start}
  .nav-toggle{display:flex}
  .site-nav{display:none;border-top:1px solid rgba(143,166,184,.18)}
  .site-nav[data-open]{display:block}
  .nav-list{flex-direction:column;align-items:stretch;gap:0;padding-bottom:12px}
  .nav-list__item a{
    width:100%;justify-content:space-between;
    padding:14px 6px;
    border-bottom:1px dashed rgba(143,166,184,.16);
    font-size:16px;
  }
  .nav-list__item a::after{left:0;right:0;bottom:4px}
  .nav-list__num{order:2}
  .footer-columns{grid-template-columns:1fr 1fr}
  .footer-col--brand{grid-column:1/-1}
  .grid--two,.grid--three{grid-template-columns:1fr}
  .grid--bento .span-3,.grid--bento .span-4,.grid--bento .span-5,
  .grid--bento .span-6,.grid--bento .span-7,.grid--bento .span-8{grid-column:span 12}
  .section-index{position:static}
}
@media (max-width:640px){
  .header-strip__inner{min-height:42px;gap:10px}
  .header-strip__meta{font-size:10px;letter-spacing:.12em}
  .header-strip__actions{gap:8px}
  .header-strip__actions .btn{padding:6px 10px;font-size:12px}
  .masthead{padding-block:18px 14px}
  .masthead__brand{gap:10px}
  .masthead__tag{font-size:10.5px;letter-spacing:.18em}
  .footer-columns{grid-template-columns:1fr}
  .footer-sheet{box-shadow:4px 4px 0 rgba(242,193,78,.3),8px 8px 0 rgba(53,208,222,.14),0 30px 50px -44px #000}
  .footer-base{justify-content:flex-start}
}

/* ============ 15. Reduced motion ============ */
@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}
  .scroll-progress__bar{transition:none}
}