/* ============ 0. Reset & Design Tokens ============ */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
:root{
  --c-sea:#17456F;
  --c-sea-deep:#0E3151;
  --c-coral:#E76F51;
  --c-coral-deep:#C95536;
  --c-moss:#527A5B;
  --c-leaf:#3D6747;
  --c-rock:#8A7F72;
  --c-sand:#E8DCC7;
  --c-sand-light:#EFE6D5;
  --c-cream:#F8F3E9;
  --c-ink:#26303A;
  --c-ink-soft:#4E5A63;
  --c-clay:#A85535;
  --font-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"JetBrains Mono","SF Mono","Cascadia Mono",Consolas,"Liberation Mono",monospace;
  --container:1200px;
  --radius:2px;
  --shadow-1:4px 4px 0 rgba(38,48,58,.08);
  --shadow-2:6px 6px 0 rgba(38,48,58,.12);
}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.65;
  color:var(--c-ink);
  background-color:var(--c-cream);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img,svg{max-width:100%;height:auto;display:block;}
h1,h2,h3,h4,h5,h6{font-weight:900;line-height:1.2;letter-spacing:.02em;color:var(--c-sea-deep);}
h1{font-size:clamp(2rem,5vw,3.4rem);}
h2{font-size:clamp(1.5rem,3vw,2.3rem);}
h3{font-size:1.25rem;}
p{margin-bottom:1em;}
ul,ol{margin:0 0 1em 1.4em;}
a{color:var(--c-sea);text-decoration-thickness:1px;text-underline-offset:3px;}
a:hover{color:var(--c-coral-deep);}
strong{font-weight:800;}
::selection{background:var(--c-coral);color:#fff;}
:focus-visible{outline:3px solid var(--c-coral);outline-offset:2px;border-radius:2px;}
:target{scroll-margin-top:100px;}

/* ============ 1. Layout & Grid ============ */
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 clamp(1rem,4vw,2.5rem);}
.section{padding:clamp(2.5rem,7vw,5rem) 0;}
.section--tight{padding:clamp(1.5rem,4vw,2.5rem) 0;}
.layout-split{display:grid;grid-template-columns:1fr;gap:clamp(1.5rem,3vw,3rem);}
@media(min-width:1024px){
  .layout-split{grid-template-columns:minmax(0,2.1fr) minmax(0,1fr);}
  .layout-split--reversed{grid-template-columns:minmax(0,1fr) minmax(0,2.1fr);}
}
.grid{display:grid;grid-template-columns:1fr;gap:1.5rem;}
@media(min-width:640px){
  .grid--2,.grid--4{grid-template-columns:repeat(2,1fr);}
  .grid--3{grid-template-columns:repeat(3,1fr);}
}
@media(min-width:1024px){
  .grid--2{grid-template-columns:repeat(2,1fr);}
  .grid--3{grid-template-columns:repeat(3,1fr);}
  .grid--4{grid-template-columns:repeat(4,1fr);}
}

/* ============ 2. Shared Components ============ */
.btn{display:inline-flex;align-items:center;gap:.5rem;padding:.7rem 1.3rem;border:1px solid transparent;border-radius:var(--radius);font-family:var(--font-sans);font-weight:700;font-size:.92rem;line-height:1.2;text-decoration:none;cursor:pointer;transition:transform .16s ease,box-shadow .16s ease,background-color .16s ease,color .16s ease;}
.btn--primary{background:var(--c-coral);color:#fff;box-shadow:0 2px 0 var(--c-coral-deep);}
.btn--primary:hover{background:var(--c-coral-deep);color:#fff;transform:translateY(-2px);box-shadow:0 4px 0 var(--c-coral-deep);}
.btn--ghost{border-color:var(--c-sea);color:var(--c-sea-deep);background:transparent;}
.btn--ghost:hover{background:var(--c-sea);color:#fff;}
.label{display:inline-block;padding:.24rem .65rem;font-size:.72rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;border-radius:var(--radius);}
.label--coral{background:var(--c-coral);color:#fff;}
.label--moss{background:var(--c-moss);color:#fff;}
.label--sea{background:var(--c-sea);color:#fff;}
.label--sand{background:var(--c-sand);color:var(--c-ink);border:1px solid var(--c-rock);}
.tag{display:inline-block;padding:.18rem .55rem;margin:0 .25rem .3rem 0;font-size:.74rem;border:1px solid var(--c-rock);background:var(--c-cream);color:var(--c-ink-soft);border-radius:999px;}
.card{position:relative;background:var(--c-cream);border:1px solid var(--c-rock);border-radius:var(--radius);box-shadow:var(--shadow-1);padding:clamp(1.1rem,2.5vw,1.8rem);transition:transform .2s ease,box-shadow .2s ease;}
.card::before{content:"";position:absolute;top:-1px;left:-1px;width:16px;height:16px;border-top:3px solid var(--c-coral);border-left:3px solid var(--c-coral);}
.card:hover{box-shadow:var(--shadow-2);}
.card--sand{background:var(--c-sand-light);}
.card--sea{background:var(--c-sea);border-color:var(--c-sea-deep);color:#fff;}
.card--sea h1,.card--sea h2,.card--sea h3,.card--sea h4{color:#fff;}
.card--sea a,.panel--sea a{color:var(--c-coral);}
.card--tilt-left{transform:rotate(-1.2deg);}
.card--tilt-right{transform:rotate(1.5deg);}
.card--tilt-left:hover,.card--tilt-right:hover{transform:rotate(0deg) translateY(-3px);}
.stat{padding:1.2rem;}
.stat__value{display:block;font-family:var(--font-mono);font-size:clamp(1.9rem,4vw,2.8rem);font-weight:700;line-height:1;letter-spacing:-.02em;color:var(--c-sea-deep);}
.card--sea .stat__value{color:#fff;}
.stat__label{display:block;margin-top:.65rem;font-size:.76rem;letter-spacing:.08em;color:var(--c-ink-soft);}
.card--sea .stat__label{color:rgba(255,255,255,.7);}
.panel{background:var(--c-sand-light);border:1px solid var(--c-rock);border-radius:var(--radius);padding:clamp(1.4rem,3vw,2.4rem);}
.panel--sea{background:var(--c-sea-deep);border-color:transparent;color:#fff;}
.panel--sea h1,.panel--sea h2,.panel--sea h3{color:#fff;}
.diag-lines{background-image:repeating-linear-gradient(45deg,rgba(138,127,114,.12) 0 1px,transparent 1px 10px);}
.vert{writing-mode:vertical-rl;font-size:.74rem;letter-spacing:.22em;color:var(--c-rock);text-transform:uppercase;margin:0;}
.section-title{display:flex;align-items:baseline;flex-wrap:wrap;gap:.6rem 1.2rem;margin:0 0 clamp(1.4rem,3vw,2.4rem);}
.section-title h2{margin:0;}
.section-title__note{font-size:.74rem;letter-spacing:.12em;color:var(--c-ink-soft);background:var(--c-sand-light);border-left:3px solid var(--c-coral);padding:.22rem .6rem;transform:rotate(-2deg);}
.page-hero{position:relative;padding:clamp(2rem,6vw,4.5rem) 0 clamp(1.2rem,3vw,2.2rem);background:var(--c-cream);border-bottom:1px solid var(--c-sand);}
.page-hero::before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:repeating-linear-gradient(90deg,var(--c-coral) 0 14px,var(--c-sea) 14px 22px);}
.page-hero__title{margin:0;font-size:clamp(1.8rem,5vw,3.2rem);}
.page-hero__meta{display:flex;flex-wrap:wrap;gap:.6rem;margin-top:1rem;}
.breadcrumb{display:flex;flex-wrap:wrap;gap:.5rem;margin:0 0 1.2rem;padding:1rem 0 0;list-style:none;font-size:.8rem;}
.breadcrumb li{display:flex;align-items:center;gap:.5rem;}
.breadcrumb li+li::before{content:"/";color:var(--c-rock);}
.breadcrumb__link{color:var(--c-sea);text-decoration:none;}
.breadcrumb__link:hover{color:var(--c-coral-deep);}
.breadcrumb__current{color:var(--c-ink-soft);}
.media{position:relative;background:var(--c-sand);border:1px solid var(--c-rock);border-radius:var(--radius);overflow:hidden;aspect-ratio:16/9;}
.media--tile{aspect-ratio:1/1;}
.media::after{content:"图位";position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);font-family:var(--font-mono);font-size:.72rem;letter-spacing:.3em;color:var(--c-rock);z-index:0;}
.media img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:1;}
.js [data-reveal]{opacity:0;transform:translateY(14px);transition:opacity .5s ease,transform .5s ease;}
.js [data-reveal].is-revealed{opacity:1;transform:none;}

/* ============ 3. Header ============ */
.skip-link{position:fixed;top:-100%;left:1rem;z-index:300;background:var(--c-sea-deep);color:#fff;padding:.65rem 1rem;font-weight:700;text-decoration:none;border-radius:0 0 4px 4px;transition:top .2s ease;}
.skip-link:focus{top:0;color:#fff;}
.scroll-progress{position:fixed;top:0;left:0;width:100%;height:4px;background:var(--c-coral);transform:scaleX(0);transform-origin:left center;z-index:280;pointer-events:none;}
.site-header{position:relative;background:var(--c-cream);border-bottom:1px solid var(--c-rock);box-shadow:0 2px 0 var(--c-sand);}
.site-header__bar{background:var(--c-sea-deep);color:rgba(255,255,255,.86);display:flex;justify-content:space-between;align-items:center;gap:1rem;padding:.42rem clamp(1rem,4vw,2.5rem);font-size:.78rem;letter-spacing:.04em;}
.site-header__note{margin:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.site-header__note::before{content:"●";color:var(--c-coral);margin-right:.5em;font-size:.68em;}
.site-header__locale{margin:0;font-family:var(--font-mono);font-size:.74rem;letter-spacing:.1em;text-transform:uppercase;flex:none;}
.masthead{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:1rem;max-width:var(--container);margin:0 auto;padding:1.1rem clamp(1rem,4vw,2.5rem) .7rem;}
.masthead__edition{display:inline-flex;align-items:baseline;gap:.4rem;justify-self:start;background:var(--c-sand);border:1px solid var(--c-rock);padding:.3rem .6rem;transform:rotate(-2deg);}
.masthead__edition-label{font-size:.66rem;letter-spacing:.12em;color:var(--c-ink-soft);}
.masthead__edition-value{font-family:var(--font-mono);font-size:1.2rem;font-weight:700;color:var(--c-coral-deep);}
.masthead__brand{display:flex;flex-direction:column;align-items:center;text-decoration:none;color:var(--c-sea-deep);}
.masthead__brand:hover{color:var(--c-coral-deep);}
.masthead__logo{width:72px;height:auto;transition:transform .25s ease;}
.masthead__brand:hover .masthead__logo{transform:rotate(-3deg) scale(1.04);}
.masthead__brand-name{font-size:clamp(1.5rem,4vw,2.4rem);font-weight:900;letter-spacing:.32em;text-indent:.32em;line-height:1;margin-top:.2em;}
.masthead__tagline{margin-top:.4em;font-size:.7rem;letter-spacing:.3em;text-indent:.3em;color:var(--c-rock);font-weight:500;}
.masthead__meta{display:inline-flex;align-items:center;gap:.5rem;justify-self:end;transform:rotate(1.4deg);}
.masthead__meta-value{font-family:var(--font-mono);font-size:1.3rem;font-weight:700;color:var(--c-moss);background:var(--c-sand-light);border:1px solid var(--c-moss);padding:.15rem .45rem;line-height:1.1;}
.masthead__meta-label{font-size:.66rem;letter-spacing:.12em;color:var(--c-ink-soft);}
.logo-graphic__wave{stroke:var(--c-coral);}
.logo-graphic__triangle{stroke:var(--c-sea-deep);}
.logo-graphic__dot{fill:var(--c-moss);}
.site-nav{display:flex;justify-content:center;flex-wrap:wrap;max-width:var(--container);margin:0 auto;border-top:1px solid var(--c-sand);border-bottom:1px solid var(--c-sand);background:var(--c-cream);}
.site-nav__link{position:relative;display:block;padding:.72rem clamp(.85rem,2.2vw,1.6rem);color:var(--c-sea-deep);text-decoration:none;font-weight:700;font-size:.94rem;letter-spacing:.06em;}
.site-nav__link::after{content:"";position:absolute;left:50%;right:50%;bottom:0;height:3px;background:var(--c-coral);transition:left .22s ease,right .22s ease;}
.site-nav__link:hover{color:var(--c-coral-deep);}
.site-nav__link:hover::after,.site-nav__link[aria-current="page"]::after{left:0;right:0;}
.site-nav__link[aria-current="page"]{color:var(--c-coral-deep);}
.nav-toggle{display:none;appearance:none;align-items:center;gap:.55rem;position:absolute;top:.8rem;right:clamp(.85rem,4vw,1.5rem);z-index:25;background:var(--c-sand-light);border:1px solid var(--c-rock);border-radius:var(--radius);padding:.5rem .8rem;font-family:var(--font-sans);font-size:.82rem;font-weight:700;color:var(--c-sea-deep);cursor:pointer;box-shadow:var(--shadow-1);}
.nav-toggle__icon{position:relative;width:18px;height:12px;flex:none;}
.nav-toggle__icon::before,.nav-toggle__icon::after{content:"";position:absolute;left:0;width:100%;height:2px;background:currentColor;transition:transform .22s ease,top .22s ease,bottom .22s ease;}
.nav-toggle__icon::before{top:0;}
.nav-toggle__icon::after{bottom:0;}
.nav-toggle.is-active .nav-toggle__icon::before{top:5px;transform:rotate(45deg);}
.nav-toggle.is-active .nav-toggle__icon::after{bottom:5px;transform:rotate(-45deg);}
.nav-toggle__text{letter-spacing:.1em;}

/* ============ 4. Footer & BackTop ============ */
.site-footer{margin-top:clamp(3rem,8vw,6rem);position:relative;background:var(--c-sea-deep);color:rgba(255,255,255,.88);border-top:4px solid var(--c-coral);}
.site-footer::before{content:"";position:absolute;top:0;left:0;right:0;height:1px;background:repeating-linear-gradient(90deg,transparent 0 16px,rgba(255,255,255,.16) 16px 20px);}
.site-footer__top{max-width:1200px;margin:0 auto;padding:clamp(2rem,5vw,3.5rem) clamp(1rem,4vw,2.5rem) 2.2rem;display:grid;grid-template-columns:1fr;gap:2rem;}
@media(min-width:768px){
  .site-footer__top{grid-template-columns:2fr 1fr 1.5fr;}
}
.brand{text-decoration:none;}
.brand--footer{display:inline-flex;align-items:center;gap:.7rem;color:#fff;}
.brand--footer:hover{color:#fff;}
.brand--footer .logo-graphic__triangle{stroke:#fff;}
.brand--footer .logo-graphic__wave{stroke:var(--c-coral);}
.brand--footer .logo-graphic__dot{fill:var(--c-sand);}
.brand__name{font-weight:900;font-size:1.25rem;letter-spacing:.22em;}
.site-footer__slogan{margin:.7rem 0 1.2rem;font-size:.78rem;letter-spacing:.2em;color:rgba(255,255,255,.55);}
.site-footer__notice{margin:0;padding-left:1rem;border-left:3px solid var(--c-coral);font-size:.85rem;line-height:1.75;color:rgba(255,255,255,.72);}
.site-footer__nav{font-size:.9rem;}
.site-footer__heading{margin:0 0 1rem;padding-bottom:.4rem;border-bottom:1px solid rgba(255,255,255,.16);font-size:.72rem;letter-spacing:.18em;text-transform:uppercase;color:var(--c-coral);}
.site-footer__link{display:block;padding:.32rem 0;color:rgba(255,255,255,.82);text-decoration:none;font-size:.9rem;}
.site-footer__link:hover{color:var(--c-coral);}
.site-footer__contact{font-size:.88rem;}
.site-footer__line{margin:0 0 .45rem;}
.site-footer__line--time{margin-top:.7rem;font-size:.76rem;color:rgba(255,255,255,.5);}
.site-footer__bottom{background:rgba(0,0,0,.16);border-top:1px solid rgba(255,255,255,.08);}
.site-footer__bottom-inner{max-width:1200px;margin:0 auto;padding:.9rem clamp(1rem,4vw,2.5rem);display:flex;flex-wrap:wrap;justify-content:space-between;gap:.4rem 1.5rem;font-size:.78rem;color:rgba(255,255,255,.55);}
.site-footer__copyright,.site-footer__icp{margin:0;font-family:var(--font-mono);}
.back-top{position:fixed;right:1.2rem;bottom:1.2rem;z-index:200;display:inline-flex;align-items:center;justify-content:center;width:46px;height:46px;background:var(--c-coral);color:#fff;border:1px solid var(--c-coral-deep);border-radius:var(--radius);text-decoration:none;font-size:1.15rem;box-shadow:var(--shadow-2);opacity:0;visibility:hidden;transform:translateY(10px);transition:opacity .25s ease,transform .25s ease,visibility .25s ease;}
.back-top:hover{background:var(--c-coral-deep);color:#fff;}
.back-top.is-visible{opacity:1;visibility:visible;transform:none;}

/* ============ 5. Mobile Header ============ */
@media(max-width:860px){
  .site-header__bar{display:none;}
  .masthead{grid-template-columns:1fr;padding:.7rem 1rem .3rem;}
  .masthead__edition,.masthead__meta{display:none;}
  .masthead__brand{text-align:center;}
  .masthead__logo{width:58px;}
  .nav-toggle{display:inline-flex;}
  .site-nav{display:block;max-height:0;overflow:hidden;transition:max-height .35s ease;border-top-width:0;border-bottom-width:0;}
  .site-nav[data-open]{max-height:440px;border-top-width:1px;border-bottom-width:1px;}
  .site-nav__link{padding:.85rem 1rem;text-align:center;border-top:1px solid var(--c-sand-light);}
  .site-nav__link::after{display:none;}
  .site-nav__link[aria-current="page"]::before{content:"●";color:var(--c-coral);font-size:.5rem;vertical-align:middle;margin-right:.45rem;}
}

/* ============ 6. Reduced Motion ============ */
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{animation-duration:.01ms !important;transition-duration:.01ms !important;scroll-behavior:auto !important;}
  .js [data-reveal]{opacity:1;transform:none;transition:none;}
  .card--tilt-left,.card--tilt-right,.masthead__edition,.masthead__meta{transform:none;}
  .back-top{transition:none;}
}