/* ==========================================================================
   /assets/site.css — 新世纪开户 · 共享层
   色彩：米白 / 暖沙 / 天山雪青 / 通道蓝 / 收藏橙 / 陶土 / 苔绿 / 岩灰
   ========================================================================== */

/* ---------- 1. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{
  -webkit-text-size-adjust:100%;
  text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:9rem;
}
body,h1,h2,h3,h4,h5,p,figure,blockquote,dl,dd,ul,ol{margin:0}
ul,ol{padding:0}
ul[class],ol[class]{list-style:none}
img,svg,video{display:block;max-width:100%;height:auto}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
a{color:var(--c-channel);text-decoration:underline;text-decoration-thickness:1.5px;text-underline-offset:3px}
main{display:block}
hr{border:0}

/* ---------- 2. 变量 ---------- */
:root{
  /* 色彩 */
  --c-cream:#FAF6EF;
  --c-sand:#E8DCC6;
  --c-glacier:#CFE0E6;
  --c-glacier-deep:#9CBCC9;
  --c-channel:#1F5FD8;
  --c-channel-deep:#12356F;
  --c-save:#F0703A;
  --c-save-ink:#8C3A16;
  --c-terra:#B36A50;
  --c-moss:#5C7A5B;
  --c-rock:#2F3538;
  --c-rock-soft:#6E767A;
  --c-white:#FFFFFF;

  /* 字体 */
  --f-display:"Source Han Sans SC","Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --f-body:var(--f-display);
  --f-mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,"Noto Sans Mono CJK SC","Courier New",monospace;

  /* 字号 */
  --fs-hero:clamp(2.5rem,6.4vw,5.5rem);
  --fs-h1:clamp(2rem,4.4vw,3.5rem);
  --fs-h2:clamp(1.5rem,2.9vw,2.5rem);
  --fs-h3:clamp(1.25rem,1.8vw,1.625rem);
  --fs-body:1.0625rem;
  --fs-small:.9375rem;
  --fs-mono:.8125rem;

  /* 空间 */
  --shell:1240px;
  --gutter:24px;
  --gap:24px;
  --space-1:.5rem;
  --space-2:.75rem;
  --space-3:1rem;
  --space-4:1.5rem;
  --space-5:2rem;
  --space-6:3rem;
  --space-7:4rem;
  --sect:clamp(4.5rem,9vw,8rem);

  /* 形状与材质 */
  --r-card:16px;
  --r-glass:20px;
  --r-pill:999px;
  --line:1.5px;
  --stroke:1.5px solid rgba(156,188,201,.6);
  --shadow-soft:0 12px 32px -26px rgba(18,53,111,.55);
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ---------- 3. 基础排版（中文） ---------- */
body{
  min-height:100vh;
  background-color:var(--c-cream);
  background-image:
    linear-gradient(180deg,rgba(207,224,230,.45),rgba(250,246,239,0) 460px),
    radial-gradient(85% 60% at 100% 0,rgba(240,112,58,.07),transparent 70%);
  background-repeat:no-repeat;
  color:var(--c-rock);
  font-family:var(--f-body);
  font-size:var(--fs-body);
  line-height:1.75;
  letter-spacing:.005em;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{
  font-family:var(--f-display);
  color:var(--c-channel-deep);
  font-weight:800;
  line-height:1.22;
  letter-spacing:-.02em;
  text-wrap:balance;
}
h1{font-size:var(--fs-h1)}
h2{font-size:var(--fs-h2);font-weight:700}
h3{font-size:var(--fs-h3);font-weight:700;line-height:1.35}
h4{font-size:1.0625rem;font-weight:700;line-height:1.45}
strong{font-weight:700;color:var(--c-channel)}
small{font-size:var(--fs-mono)}
::selection{background:rgba(31,95,216,.16);color:var(--c-channel-deep)}
:focus-visible{outline:3px solid var(--c-channel);outline-offset:3px;border-radius:6px}

/* ---------- 4. 跳转链接 ---------- */
.skip-link{
  position:fixed;
  left:24px;
  top:-120px;
  z-index:200;
  padding:12px 22px;
  border-radius:0 0 12px 12px;
  background:var(--c-channel-deep);
  color:#fff;
  font-size:var(--fs-small);
  font-weight:700;
  text-decoration:none;
  transition:top .2s var(--ease);
}
.skip-link:focus{top:0;color:#fff}

/* ---------- 5. 布局容器 ---------- */
.shell{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.shell--narrow{max-width:820px}
.section{padding-block:var(--sect)}
.section--tight{padding-block:calc(var(--sect) * .58)}
.section--sand{background:var(--c-sand)}
.section--glacier{background:linear-gradient(180deg,rgba(207,224,230,.55),rgba(207,224,230,.16))}
.section--deep{background:var(--c-channel-deep);color:rgba(250,246,239,.86)}
.section--deep h1,.section--deep h2,.section--deep h3,.section--deep h4{color:#fff}
.section--deep .lede{color:rgba(250,246,239,.78)}
.section__head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:var(--space-3) var(--space-5);
  margin-bottom:var(--space-5);
}
.eyebrow{
  display:flex;
  align-items:center;
  gap:10px;
  margin-bottom:10px;
  font-family:var(--f-mono);
  font-size:var(--fs-mono);
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--c-terra);
}
.eyebrow::before{content:"";width:26px;height:1.5px;background:var(--c-terra);flex:0 0 auto}
.lede{
  max-width:62ch;
  font-size:clamp(1.05rem,1.5vw,1.25rem);
  line-height:1.7;
  color:var(--c-rock-soft);
}
.stack > * + *{margin-top:var(--space-3)}
.rule{height:1px;margin-block:var(--space-5);background:linear-gradient(90deg,var(--c-glacier-deep),rgba(156,188,201,0))}

/* ---------- 6. 网格 ---------- */
.grid{display:grid;gap:var(--gap)}
.grid--split{grid-template-columns:minmax(0,38fr) minmax(0,62fr)}
.grid--split-alt{grid-template-columns:minmax(0,45fr) minmax(0,55fr)}
.grid--half{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--thirds{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--quarters{grid-template-columns:repeat(4,minmax(0,1fr))}
@media (max-width:1040px){
  .grid--thirds,.grid--quarters{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:900px){
  .grid--split,.grid--split-alt{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:600px){
  .grid--half,.grid--thirds,.grid--quarters{grid-template-columns:minmax(0,1fr)}
}

/* ---------- 7. 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 24px;
  border-radius:var(--r-pill);
  border:var(--line) solid transparent;
  font-family:var(--f-display);
  font-size:var(--fs-small);
  font-weight:600;
  line-height:1.2;
  letter-spacing:.02em;
  text-decoration:none;
  cursor:pointer;
  transition:background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease);
}
.btn:active{transform:translateY(1px) scale(.99)}
.btn--primary{background:var(--c-channel);border-color:var(--c-channel);color:#fff}
.btn--primary:hover{background:var(--c-channel-deep);border-color:var(--c-channel-deep);color:#fff}
.btn--ghost{background:rgba(255,255,255,.65);border-color:rgba(31,95,216,.45);color:var(--c-channel-deep)}
.btn--ghost:hover{background:#fff;border-color:var(--c-channel);color:var(--c-channel)}
.btn--save{background:rgba(240,112,58,.12);border-color:var(--c-save);color:var(--c-channel-deep)}
.btn--save:hover{background:rgba(240,112,58,.2);color:var(--c-channel-deep)}
.btn--save::before{
  content:"";
  width:11px;height:11px;flex:0 0 auto;
  background:var(--c-save);
  clip-path:polygon(50% 0,61% 35%,98% 35%,68% 57%,79% 91%,50% 70%,21% 91%,32% 57%,2% 35%,39% 35%);
}
.btn--quiet{padding-inline:6px;background:none;border-color:transparent;color:var(--c-channel-deep)}
.btn--quiet:hover{color:var(--c-channel);text-decoration:underline}
.btn--block{width:100%}

/* ---------- 8. 面板 ---------- */
.panel{
  position:relative;
  padding:clamp(1.25rem,2.2vw,2rem);
  border:var(--stroke);
  border-radius:var(--r-card);
  background:var(--c-white);
  box-shadow:var(--shadow-soft);
}
.panel--glass{
  background:rgba(250,246,239,.72);
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
  border-color:rgba(255,255,255,.72);
  border-radius:var(--r-glass);
}
.panel--sand{background:var(--c-sand);border-color:rgba(179,106,80,.35)}
.panel--quiet{background:rgba(207,224,230,.26);border-color:rgba(156,188,201,.55);box-shadow:none}
.panel__head{display:flex;align-items:baseline;justify-content:space-between;gap:var(--space-3);margin-bottom:var(--space-3)}
.panel__title{font-size:var(--fs-h3);font-weight:700;line-height:1.3;color:var(--c-channel-deep)}
.panel__meta{font-family:var(--f-mono);font-size:var(--fs-mono);letter-spacing:.1em;text-transform:uppercase;color:var(--c-rock-soft)}
.panel__body{color:var(--c-rock)}

/* ---------- 9. 标签 / 统计 ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 11px;
  border:var(--line) solid rgba(156,188,201,.7);
  border-radius:var(--r-pill);
  background:rgba(255,255,255,.7);
  font-family:var(--f-mono);
  font-size:.75rem;
  letter-spacing:.08em;
  text-transform:uppercase;
  color:var(--c-channel-deep);
}
.tag--blue{border-color:rgba(31,95,216,.5);color:var(--c-channel)}
.tag--moss{border-color:rgba(92,122,91,.55);color:var(--c-moss)}
.tag--save{border-color:rgba(240,112,58,.65);color:var(--c-save-ink)}
.stat__value{
  display:block;
  font-family:var(--f-display);
  font-size:clamp(1.75rem,3vw,2.5rem);
  font-weight:800;
  line-height:1.1;
  letter-spacing:-.02em;
  color:var(--c-channel-deep);
}
.stat__label{
  display:block;
  margin-top:6px;
  font-family:var(--f-mono);
  font-size:var(--fs-mono);
  letter-spacing:.1em;
  text-transform:uppercase;
  color:var(--c-rock-soft);
}

/* ---------- 10. 图片容器 ---------- */
.media{
  position:relative;
  margin:0;
  border-radius:var(--r-card);
  overflow:hidden;
  background:linear-gradient(160deg,rgba(207,224,230,.9),rgba(232,220,198,.9));
}
.media__frame{
  position:relative;
  display:grid;
  place-items:center;
  aspect-ratio:16/9;
  overflow:hidden;
  background:linear-gradient(160deg,rgba(207,224,230,.9),rgba(232,220,198,.9));
}
.media--wide .media__frame{aspect-ratio:16/9}
.media--panorama .media__frame{aspect-ratio:21/9}
.media--square .media__frame{aspect-ratio:1/1}
.media--tall .media__frame{aspect-ratio:4/5}
.media__frame > img,
.media__frame > svg,
.media__frame > video{width:100%;height:100%;object-fit:cover}
.media__art{
  position:absolute;
  inset:0;
  background-image:repeating-linear-gradient(135deg,rgba(255,255,255,.34) 0 10px,rgba(255,255,255,0) 10px 22px);
  pointer-events:none;
}
.media__badge{
  position:absolute;
  left:12px;
  bottom:12px;
  padding:6px 12px;
  border-radius:var(--r-pill);
  background:rgba(250,246,239,.75);
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
  font-family:var(--f-mono);
  font-size:.72rem;
  letter-spacing:.1em;
  text-transform:uppercase;
  color:var(--c-channel-deep);
}
.media__cap{
  padding:10px 4px 0;
  font-family:var(--f-mono);
  font-size:.75rem;
  letter-spacing:.08em;
  color:var(--c-rock-soft);
}

/* ---------- 11. 面包屑 / 长文 ---------- */
.crumbs{padding-block:var(--space-4) 0}
.crumbs__list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-family:var(--f-mono);
  font-size:.75rem;
  letter-spacing:.08em;
  text-transform:uppercase;
  color:var(--c-rock-soft);
}
.crumbs__item{display:flex;align-items:center;gap:8px}
.crumbs__item + .crumbs__item::before{content:"/";color:var(--c-glacier-deep)}
.crumbs__item[aria-current="page"]{color:var(--c-channel-deep)}
.crumbs__link{color:var(--c-rock-soft);text-decoration:none}
.crumbs__link:hover{color:var(--c-channel);text-decoration:underline}

.prose{max-width:68ch;color:var(--c-rock)}
.prose > * + *{margin-top:var(--space-4)}
.prose h2{margin-top:var(--space-6);font-size:var(--fs-h2)}
.prose h3{margin-top:var(--space-5);font-size:var(--fs-h3)}
.prose ul,.prose ol{padding-left:1.4em;list-style:revert}
.prose li + li{margin-top:.4em}
.prose li::marker{color:var(--c-terra)}
.prose blockquote{
  margin:var(--space-5) 0;
  padding:var(--space-2) 0 var(--space-2) var(--space-4);
  border-left:3px solid var(--c-terra);
  color:var(--c-rock-soft);
}
.prose code{
  padding:.15em .42em;
  border-radius:6px;
  background:rgba(207,224,230,.5);
  font-family:var(--f-mono);
  font-size:.9em;
}
.list-clean{display:grid;gap:10px;list-style:none;padding:0}
.link-plain{
  color:inherit;
  text-decoration:none;
  border-bottom:1.5px solid transparent;
  transition:color .22s var(--ease),border-color .22s var(--ease);
}
.link-plain:hover{color:var(--c-channel);border-bottom-color:var(--c-channel)}
.link-arrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-weight:600;
  color:var(--c-channel);
  text-decoration:none;
}
.link-arrow::after{content:"→";transition:transform .22s var(--ease)}
.link-arrow:hover::after{transform:translateX(4px)}

/* ---------- 12. 刊头 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(250,246,239,.88);
  -webkit-backdrop-filter:blur(8px) saturate(1.05);
  backdrop-filter:blur(8px) saturate(1.05);
  border-bottom:1px solid rgba(156,188,201,.6);
  transition:box-shadow .3s var(--ease);
}
.site-header[data-compact="true"]{box-shadow:0 14px 32px -28px rgba(18,53,111,.85)}
.masthead{position:relative}
.masthead__inner{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.masthead__meta{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:var(--space-3);
  max-height:60px;
  padding-block:10px;
  overflow:hidden;
  border-bottom:1px solid rgba(156,188,201,.5);
  font-family:var(--f-mono);
  font-size:.75rem;
  letter-spacing:.1em;
  text-transform:uppercase;
  color:var(--c-rock-soft);
  transition:max-height .34s var(--ease),opacity .2s linear,padding .34s var(--ease),border-color .2s linear;
}
.masthead__brand-line{color:var(--c-rock-soft)}
.masthead__edition{color:var(--c-terra)}
.site-header[data-compact="true"] .masthead__meta{
  max-height:0;
  opacity:0;
  padding-block:0;
  border-color:transparent;
}
.masthead__wordmark-row{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:var(--space-3);
  padding-block:clamp(.6rem,1.4vw,1rem);
}
.masthead__wordmark{
  display:inline-flex;
  align-items:baseline;
  font-family:var(--f-display);
  font-weight:800;
  font-size:clamp(1.6rem,3.6vw,2.9rem);
  line-height:1.05;
  letter-spacing:-.02em;
  color:var(--c-channel-deep);
  text-decoration:none;
  transition:font-size .34s var(--ease),color .2s var(--ease);
}
.masthead__wordmark:hover{color:var(--c-channel)}
.masthead__wordmark-main{position:relative;padding-right:.3em}
.masthead__wordmark-main::after{
  content:"";
  position:absolute;
  top:.1em;
  right:.02em;
  width:.16em;
  height:.16em;
  border-radius:50%;
  background:var(--c-save);
}
.masthead__wordmark-abbr{display:none}
.site-header[data-compact="true"] .masthead__wordmark{font-size:clamp(1.15rem,2vw,1.5rem)}
.site-header[data-compact="true"] .masthead__wordmark-main{display:none}
.site-header[data-compact="true"] .masthead__wordmark-abbr{display:inline}

.utility{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.utility__btn{
  display:inline-flex;
  align-items:center;
  gap:7px;
  padding:9px 17px;
  border:var(--line) solid rgba(31,95,216,.42);
  border-radius:var(--r-pill);
  background:rgba(255,255,255,.65);
  color:var(--c-channel-deep);
  font-size:var(--fs-mono);
  font-weight:600;
  line-height:1.1;
  letter-spacing:.03em;
  text-decoration:none;
  white-space:nowrap;
  transition:background-color .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease);
}
.utility__btn:hover{background:#fff;border-color:var(--c-channel);color:var(--c-channel)}
.utility__btn--star::before{
  content:"";
  width:11px;height:11px;flex:0 0 auto;
  background:var(--c-save);
  clip-path:polygon(50% 0,61% 35%,98% 35%,68% 57%,79% 91%,50% 70%,21% 91%,32% 57%,2% 35%,39% 35%);
}

.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  margin-left:auto;
  padding:10px 16px;
  border:var(--line) solid rgba(31,95,216,.42);
  border-radius:var(--r-pill);
  background:rgba(255,255,255,.7);
  color:var(--c-channel-deep);
  font-size:var(--fs-mono);
  font-weight:600;
  letter-spacing:.06em;
}
.nav-toggle:hover{border-color:var(--c-channel);color:var(--c-channel)}
.nav-toggle__bars{position:relative;display:inline-block;width:16px;height:10px}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";
  position:absolute;
  left:0;right:0;
  height:1.5px;
  background:currentColor;
  transition:transform .22s var(--ease),top .22s var(--ease);
}
.nav-toggle__bars::before{top:0}
.nav-toggle__bars::after{top:8px}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{top:4px;transform:rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{top:4px;transform:rotate(-45deg)}
.nav-toggle__text{line-height:1}

.site-nav{padding-bottom:clamp(.5rem,1.2vw,.9rem)}
.site-nav__list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:center;
  margin:0;
  padding:0;
  list-style:none;
}
.site-nav__item{display:flex;align-items:center}
.site-nav__item + .site-nav__item::before{
  content:"";
  flex:0 0 auto;
  width:1px;
  height:14px;
  margin-inline:14px;
  background:var(--c-glacier-deep);
}
.site-nav__link{
  position:relative;
  display:inline-block;
  padding:6px 2px 9px;
  color:var(--c-rock);
  font-size:var(--fs-small);
  font-weight:500;
  letter-spacing:.02em;
  text-decoration:none;
  transition:color .2s var(--ease);
}
.site-nav__link::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:2px;
  height:2px;
  background:var(--c-channel);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .22s var(--ease);
}
.site-nav__link:hover{color:var(--c-channel)}
.site-nav__link:hover::after,
.site-nav__link:focus-visible::after{transform:scaleX(1)}
.site-nav__link[aria-current="page"]{color:var(--c-channel);font-weight:700}
.site-nav__link[aria-current="page"]::after{transform:scaleX(1);background:var(--c-save)}

.scroll-progress{
  position:absolute;
  left:0;right:0;bottom:-1px;
  height:2px;
  background:linear-gradient(90deg,var(--c-channel),var(--c-save));
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .1s linear;
}

@media (max-width:880px){
  .utility{display:none}
  .nav-toggle{display:inline-flex}
  .site-nav{display:none;padding-bottom:var(--space-3)}
  .site-nav[data-open]{display:block}
  .site-nav__list{flex-direction:column;align-items:stretch;justify-content:flex-start}
  .site-nav__item{display:block;border-top:1px solid rgba(156,188,201,.5)}
  .site-nav__item + .site-nav__item::before{display:none}
  .site-nav__item:last-child{border-bottom:1px solid rgba(156,188,201,.5)}
  .site-nav__link{display:block;padding:14px 6px;font-size:1.0625rem;text-align:center}
  .site-nav__link::after{left:50%;right:auto;bottom:8px;width:42px;margin-left:-21px}
  .masthead__wordmark-row{flex-wrap:nowrap}
}
@media (max-width:640px){
  .masthead__meta{
    flex-direction:column;
    align-items:flex-start;
    gap:2px;
    max-height:80px;
    padding-block:8px;
    letter-spacing:.06em;
    text-transform:none;
  }
}

/* ---------- 13. 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(3rem,7vw,5rem);
  overflow:hidden;
  background:var(--c-sand);
  border-top:1px solid rgba(179,106,80,.35);
  color:var(--c-rock);
}
.footer__ridge{
  position:absolute;
  inset:auto 0 0 0;
  z-index:0;
  height:140px;
  pointer-events:none;
  background-image:
    radial-gradient(120% 100% at 10% 128%,rgba(156,188,201,.55),rgba(156,188,201,0) 62%),
    radial-gradient(95% 100% at 58% 136%,rgba(179,106,80,.3),rgba(179,106,80,0) 66%),
    radial-gradient(80% 100% at 94% 130%,rgba(92,122,91,.24),rgba(92,122,91,0) 64%);
}
.footer__inner{
  position:relative;
  z-index:1;
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding:clamp(2.5rem,5vw,4rem) var(--gutter) 2rem;
}
.footer__top{
  display:grid;
  grid-template-columns:minmax(0,32fr) minmax(0,68fr);
  gap:clamp(1.5rem,3vw,3rem);
  padding-bottom:var(--space-6);
  border-bottom:1px solid rgba(179,106,80,.32);
}
.footer__brand-name{
  font-family:var(--f-display);
  font-size:clamp(1.35rem,2.2vw,1.75rem);
  font-weight:800;
  letter-spacing:-.02em;
  color:var(--c-channel-deep);
}
.footer__brand-line{
  margin-top:6px;
  font-family:var(--f-mono);
  font-size:.75rem;
  letter-spacing:.1em;
  text-transform:uppercase;
  color:var(--c-rock-soft);
}
.footer__brand-note{margin-top:var(--space-3);max-width:36ch;font-size:var(--fs-small)}
.footer__columns{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:var(--space-4);
}
.footer__col{min-width:0}
.footer__col-title{
  margin-bottom:var(--space-3);
  font-family:var(--f-mono);
  font-size:var(--fs-mono);
  font-weight:700;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--c-terra);
}
.footer__list{display:grid;gap:10px;margin:0;padding:0;list-style:none}
.footer__link{
  position:relative;
  display:inline-block;
  color:var(--c-rock);
  font-size:var(--fs-small);
  text-decoration:none;
  transition:color .2s var(--ease);
}
.footer__link::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:-2px;
  height:1.5px;
  background:var(--c-channel);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .22s var(--ease);
}
.footer__link:hover{color:var(--c-channel)}
.footer__link:hover::after{transform:scaleX(1)}
.footer__bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  justify-content:space-between;
  gap:10px 24px;
  padding-top:var(--space-4);
  font-size:.8125rem;
  color:var(--c-rock-soft);
}
.footer__legal{font-family:var(--f-mono);letter-spacing:.06em}
.footer__contact{max-width:62ch}
.footer__year{font-family:var(--f-mono);letter-spacing:.08em;white-space:nowrap}
@media (max-width:900px){
  .footer__top{grid-template-columns:minmax(0,1fr)}
  .footer__columns{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:520px){
  .footer__columns{grid-template-columns:minmax(0,1fr);gap:var(--space-5)}
}

/* ---------- 14. 滚动显现 ---------- */
[data-reveal]{transition:opacity .38s var(--ease),transform .38s var(--ease)}
.js-reveal [data-reveal]{opacity:0;transform:translateY(12px)}
.js-reveal [data-reveal].is-in{opacity:1;transform:none}

/* ---------- 15. 动效降级 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
    scroll-behavior:auto !important;
  }
  .js-reveal [data-reveal]{opacity:1;transform:none}
  .masthead__meta{transition:none}
}