/* 302品牌 共享样式 /assets/site.css */

*,*::before,*::after{box-sizing:border-box}

:root{
  --ink:#0B1B2B;
  --indigo:#241E4E;
  --teal:#0E3B3B;
  --wine:#4A1E2B;
  --signal:#FF6B35;
  --cyan:#00E5FF;
  --grey:#9AA6B2;
  --white:#FFFFFF;
  --mist:#D7DEE6;

  --hair:rgba(0,229,255,.28);
  --hair-soft:rgba(215,222,230,.16);
  --surface:rgba(255,255,255,.035);
  --surface-strong:rgba(14,59,59,.55);

  --font-heading:"Noto Serif SC","Source Han Serif SC","Songti SC",serif;
  --font-body:Inter,"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-mono:"JetBrains Mono","Roboto Mono",SFMono-Regular,Menlo,monospace;

  --r-xl:28px;
  --r-lg:20px;
  --r-md:14px;
  --pill:999px;

  --shell:1320px;
  --gutter:clamp(20px,4vw,48px);
  --section-y:clamp(72px,9vw,140px);

  --dur:180ms;
  --ease:cubic-bezier(.22,1,.36,1);
}

html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}

body{
  margin:0;
  background:var(--ink);
  color:var(--mist);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

img,svg,video{max-width:100%;height:auto;display:block}

h1,h2,h3,h4{
  font-family:var(--font-heading);
  color:var(--white);
  font-weight:800;
  line-height:1.2;
  letter-spacing:.01em;
  margin:0 0 .6em;
}
h1{font-size:clamp(38px,5.6vw,72px)}
h2{font-size:clamp(28px,3.6vw,44px)}
h3{font-size:clamp(20px,2.2vw,26px)}
h4{font-size:18px}
p{margin:0 0 1em}
ul,ol{margin:0 0 1em;padding-left:1.3em}
strong{color:var(--white)}

a{color:var(--cyan);text-decoration:none}
a:hover{text-decoration:underline}

:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:6px}

#main-content{scroll-margin-top:96px}
#main-content:focus{outline:none}

/* ---------- 跳转链接 ---------- */
.skip-link{
  position:absolute;
  left:20px;
  top:-72px;
  z-index:200;
  padding:10px 20px;
  border-radius:var(--pill);
  background:var(--cyan);
  color:var(--ink);
  font-weight:700;
  font-size:14px;
  transition:top var(--dur) var(--ease);
}
.skip-link:focus{top:12px;text-decoration:none}

/* ---------- 页头 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:90;
  background:var(--indigo);
  border-bottom:1px solid var(--hair);
}
.header-frame{
  width:100%;
  max-width:var(--shell);
  margin:0 auto;
  padding:14px var(--gutter);
  display:flex;
  align-items:center;
  gap:18px;
}

.brand{display:inline-flex;align-items:center;gap:12px;flex:0 0 auto}
.brand:hover{text-decoration:none}
.brand-mark{
  position:relative;
  width:36px;height:36px;
  flex:0 0 auto;
  border-radius:12px;
  background:rgba(0,229,255,.1);
  border:1px solid var(--hair);
  display:grid;
  place-items:center;
}
.brand-pulse{
  width:10px;height:10px;
  border-radius:50%;
  background:var(--cyan);
  animation:pulse 2.4s var(--ease) infinite;
}
@keyframes pulse{
  0%{box-shadow:0 0 0 0 rgba(0,229,255,.5)}
  70%{box-shadow:0 0 0 12px rgba(0,229,255,0)}
  100%{box-shadow:0 0 0 0 rgba(0,229,255,0)}
}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.brand-name{
  font-family:var(--font-heading);
  font-weight:800;
  font-size:19px;
  color:var(--white);
  letter-spacing:.02em;
}
.brand-line{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.08em;
  text-transform:uppercase;
  color:var(--grey);
}

.nav-toggle{
  display:none;
  align-items:center;
  gap:8px;
  margin-left:auto;
  padding:9px 15px;
  border-radius:var(--pill);
  border:1px solid var(--hair);
  background:transparent;
  color:var(--mist);
  font-family:var(--font-body);
  font-size:14px;
  cursor:pointer;
  transition:background-color var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.nav-toggle:hover{color:var(--white);background:rgba(0,229,255,.1)}
.nav-toggle[aria-expanded="true"]{background:var(--signal);border-color:var(--signal);color:var(--ink)}
.nav-toggle-bars{position:relative;display:inline-block;width:16px;height:2px;border-radius:2px;background:currentColor}
.nav-toggle-bars::before,
.nav-toggle-bars::after{
  content:"";
  position:absolute;left:0;
  width:16px;height:2px;border-radius:2px;
  background:currentColor;
  transition:transform var(--dur) var(--ease);
}
.nav-toggle-bars::before{top:-5px}
.nav-toggle-bars::after{top:5px}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars{background:transparent}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::before{transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after{transform:translateY(-5px) rotate(-45deg)}
.nav-toggle-label{letter-spacing:.04em}

.site-nav{margin-left:auto;min-width:0}
.nav-list{list-style:none;display:flex;align-items:center;gap:4px;margin:0;padding:0}
.nav-item{min-width:0}
.nav-link{
  display:inline-block;
  padding:8px 14px;
  border-radius:var(--pill);
  border:1px solid transparent;
  color:var(--mist);
  font-size:15px;
  line-height:1.4;
  white-space:nowrap;
  transition:color var(--dur) var(--ease),background-color var(--dur) var(--ease),border-color var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.nav-link:hover{
  color:var(--white);
  background:rgba(0,229,255,.1);
  border-color:var(--hair);
  transform:translateY(-1px);
  text-decoration:none;
}
.nav-link[aria-current="page"]{
  background:var(--cyan);
  border-color:var(--cyan);
  color:var(--ink);
  font-weight:700;
}

.header-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.status-chip{
  display:inline-flex;
  align-items:center;
  gap:8px;
  margin:0;
  padding:7px 14px;
  border-radius:var(--pill);
  border:1px solid var(--hair-soft);
  background:rgba(255,255,255,.03);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  text-transform:uppercase;
  color:var(--mist);
  white-space:nowrap;
}
.status-dot{
  width:8px;height:8px;
  flex:0 0 auto;
  border-radius:50%;
  background:var(--cyan);
  animation:pulse 2.4s var(--ease) infinite;
}

.scroll-progress{
  position:absolute;
  left:0;right:0;bottom:-1px;
  height:2px;
  overflow:hidden;
  pointer-events:none;
}
.scroll-progress span{
  display:block;
  height:100%;width:100%;
  transform:scaleX(0);
  transform-origin:0 50%;
  background:linear-gradient(90deg,var(--cyan),var(--signal));
  transition:transform 120ms linear;
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:11px 22px;
  border-radius:var(--pill);
  border:1px solid transparent;
  font-family:var(--font-body);
  font-size:15px;
  font-weight:700;
  line-height:1.3;
  white-space:nowrap;
  cursor:pointer;
  transition:transform var(--dur) var(--ease),background-color var(--dur) var(--ease),border-color var(--dur) var(--ease),color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.btn:hover{text-decoration:none;transform:translateY(-2px)}
.btn-primary{
  background:var(--signal);
  color:var(--ink);
  box-shadow:0 10px 24px -16px rgba(255,107,53,.9);
}
.btn-primary:hover{background:#FF8355;box-shadow:0 16px 28px -16px rgba(255,107,53,.95)}
.btn-ghost{background:transparent;border-color:var(--hair);color:var(--cyan)}
.btn-ghost:hover{background:rgba(0,229,255,.1);border-color:var(--cyan)}

/* ---------- 容器与节奏 ---------- */
.shell{width:100%;max-width:var(--shell);margin:0 auto;padding-inline:var(--gutter)}
.shell--narrow{max-width:880px}

.section{padding-block:var(--section-y)}
.section--tight{padding-block:clamp(40px,4vw,64px)}
.section--loose{padding-block:clamp(96px,12vw,180px)}

.band{padding-block:var(--section-y)}
.band--teal{background:var(--teal)}
.band--wine{background:var(--wine)}
.band--indigo{background:var(--indigo)}

.curve-top{
  position:relative;
  z-index:1;
  margin-top:calc(clamp(36px,5vw,64px) * -1);
  border-top-left-radius:56px;
  border-top-right-radius:56px;
  padding-top:clamp(36px,5vw,64px);
}

.grid{display:grid;gap:clamp(16px,2vw,28px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--4{grid-template-columns:repeat(4,minmax(0,1fr))}

/* ---------- 面板与卡片 ---------- */
.panel{
  background:var(--surface-strong);
  border:1px solid var(--hair-soft);
  border-radius:var(--r-xl);
  padding:clamp(22px,2.4vw,32px);
}
.card{
  background:var(--surface);
  border:1px solid var(--hair-soft);
  border-radius:var(--r-lg);
  padding:clamp(20px,2vw,26px);
  transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease),background-color var(--dur) var(--ease);
}
.card:hover{
  transform:translateY(-3px);
  border-color:var(--hair);
  background:rgba(255,255,255,.06);
}
.card-title{
  font-family:var(--font-heading);
  font-weight:800;
  font-size:20px;
  color:var(--white);
  margin:0 0 10px;
}
.card-text{margin:0;font-size:15px;line-height:1.7;color:var(--mist)}

/* ---------- 胶囊标签条 ---------- */
.tag-row{
  list-style:none;
  display:flex;
  gap:10px;
  margin:0;
  padding:6px 2px 14px;
  overflow-x:auto;
  scroll-snap-type:x proximity;
  -webkit-overflow-scrolling:touch;
  scrollbar-width:thin;
  scrollbar-color:var(--hair) transparent;
}
.tag-row::-webkit-scrollbar{height:6px}
.tag-row::-webkit-scrollbar-thumb{background:var(--hair);border-radius:99px}
.tag-row::-webkit-scrollbar-track{background:transparent}
.tag{
  flex:0 0 auto;
  scroll-snap-align:start;
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:9px 18px;
  border-radius:var(--pill);
  border:1px solid var(--hair-soft);
  background:rgba(255,255,255,.03);
  color:var(--mist);
  font-family:var(--font-mono);
  font-size:14px;
  letter-spacing:.06em;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease),background-color var(--dur) var(--ease);
}
.tag:hover{
  color:var(--cyan);
  border-color:var(--cyan);
  background:rgba(0,229,255,.08);
  text-decoration:none;
}
.tag[aria-current="page"]{
  background:var(--cyan);
  border-color:var(--cyan);
  color:var(--ink);
  font-weight:700;
}

/* ---------- 面包屑 ---------- */
.breadcrumb{padding-block:20px 0}
.breadcrumb-list{
  list-style:none;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
  margin:0;padding:0;
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.06em;
  color:var(--grey);
}
.breadcrumb-list li{display:inline-flex;align-items:center;gap:10px}
.breadcrumb-list li:not(:last-child)::after{content:"/";color:rgba(154,166,178,.6)}
.breadcrumb-link{color:var(--grey)}
.breadcrumb-link:hover{color:var(--cyan)}
.breadcrumb-current{color:var(--white)}

/* ---------- 文本工具 ---------- */
.eyebrow{
  margin:0 0 14px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--cyan);
}
.section-title{margin:0 0 14px}
.section-lede{max-width:66ch;margin:0 0 28px;font-size:17px;color:var(--mist)}
.mono{font-family:var(--font-mono);letter-spacing:.06em}
.status-value{
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.08em;
  text-transform:uppercase;
  color:var(--cyan);
}

/* ---------- 图片容器 ---------- */
.media-frame{
  position:relative;
  overflow:hidden;
  aspect-ratio:16/9;
  border-radius:var(--r-xl);
  border:1px solid var(--hair-soft);
  background:
    radial-gradient(circle at 20% 22%,rgba(0,229,255,.16),transparent 55%),
    radial-gradient(circle at 82% 74%,rgba(255,107,53,.14),transparent 55%),
    var(--teal);
}
.media-frame img,
.media-frame video{width:100%;height:100%;object-fit:cover}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--square{aspect-ratio:1/1}
.media-frame--tall{aspect-ratio:3/4}
.media-caption{
  margin:10px 0 0;
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.04em;
  color:var(--grey);
}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--indigo);
  border-top:1px solid var(--hair);
  margin-top:clamp(48px,7vw,96px);
}
.footer-frame{
  width:100%;
  max-width:var(--shell);
  margin:0 auto;
  padding:clamp(48px,6vw,84px) var(--gutter) 28px;
}
.footer-top{
  display:grid;
  grid-template-columns:minmax(240px,1fr) 2fr;
  gap:clamp(32px,4vw,72px);
}
.footer-brand-name{
  font-family:var(--font-heading);
  font-weight:800;
  font-size:26px;
  color:var(--white);
  margin:0 0 6px;
}
.footer-brand-line{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.1em;
  text-transform:uppercase;
  color:var(--cyan);
  margin:0 0 18px;
}
.footer-contact-line{margin:0 0 8px;font-size:14px;color:var(--mist)}
.footer-brand .btn{margin-top:14px}

.footer-cols{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(24px,3vw,48px);
}
.footer-col{min-width:0}
.footer-heading{
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:700;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--grey);
  margin:0 0 16px;
}
.footer-links{list-style:none;margin:0;padding:0;display:grid;gap:10px}
.footer-link{
  display:inline-block;
  color:var(--mist);
  font-size:15px;
  transition:color var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.footer-link:hover{color:var(--cyan);transform:translateX(3px);text-decoration:none}

.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:12px 24px;
  margin-top:clamp(36px,4vw,56px);
  padding-top:22px;
  border-top:1px solid var(--hair-soft);
}
.footer-legal{
  margin:0;
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.04em;
  color:var(--grey);
}
.footer-copy{margin:0;font-size:13px;color:var(--grey)}
.to-top{
  margin-left:auto;
  padding:9px 18px;
  border-radius:var(--pill);
  border:1px solid var(--hair);
  background:transparent;
  color:var(--cyan);
  font-family:var(--font-body);
  font-size:13px;
  cursor:pointer;
  opacity:0;
  visibility:hidden;
  transition:opacity var(--dur) var(--ease),visibility var(--dur) var(--ease),background-color var(--dur) var(--ease);
}
.to-top.is-visible{opacity:1;visibility:visible}
.to-top:hover{background:rgba(0,229,255,.1)}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .nav-toggle{display:inline-flex}
  .site-nav{
    position:absolute;
    left:0;right:0;top:100%;
    display:none;
    margin:0;
    background:var(--indigo);
    border-bottom:1px solid var(--hair);
    box-shadow:0 28px 44px -30px rgba(0,0,0,.9);
    max-height:calc(100vh - 72px);
    overflow-y:auto;
  }
  .site-nav[data-open="true"]{display:block}
  .nav-list{
    flex-direction:column;
    align-items:stretch;
    gap:4px;
    padding:14px var(--gutter) 26px;
  }
  .nav-link{display:block;padding:14px 16px;border-radius:var(--r-md);font-size:16px}
  .header-actions{gap:10px}
  .status-chip{display:none}
  body.nav-open{overflow:hidden}
}

@media (max-width:900px){
  .footer-top{grid-template-columns:1fr;gap:36px}
}

@media (max-width:768px){
  .grid--3,.grid--4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .section,.band{padding-block:clamp(56px,8vw,88px)}
}

@media (max-width:560px){
  .grid--2,.grid--3,.grid--4{grid-template-columns:1fr}
  .footer-cols{grid-template-columns:repeat(2,minmax(0,1fr))}
  .brand-line{display:none}
  .nav-toggle-label{display:none}
  .to-top{margin-left:0}
  .curve-top{border-top-left-radius:32px;border-top-right-radius:32px}
}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .brand-pulse,.status-dot{animation:none}
  .card:hover,.btn:hover,.footer-link:hover,.nav-link:hover{transform:none}
}