:root{
  --brand:#ff5a3c;
  --brand-2:#ff8a5c;
  --brand-3:#ffd166;
  --accent:#6c5ce7;
  --accent-2:#00b8d4;
  --bg:#f7f5f2;
  --bg-soft:#fffdfa;
  --surface:#ffffff;
  --surface-glass:rgba(255,255,255,.62);
  --surface-glass-strong:rgba(255,255,255,.82);
  --text:#1f1d2b;
  --text-soft:#4a4759;
  --text-muted:#7b7789;
  --border:rgba(31,29,43,.1);
  --shadow-sm:0 2px 8px rgba(31,29,43,.06);
  --shadow-md:0 10px 30px rgba(31,29,43,.09);
  --shadow-lg:0 24px 60px rgba(31,29,43,.14);
  --radius-sm:10px;
  --radius-md:16px;
  --radius-lg:24px;
  --radius-xl:32px;
  --grad-hero:linear-gradient(135deg,#ff5a3c 0%,#ff8a5c 38%,#ffd166 100%);
  --grad-banner:linear-gradient(120deg,#6c5ce7 0%,#ff5a3c 55%,#ffd166 100%);
  --grad-card:linear-gradient(160deg,rgba(255,255,255,.9),rgba(255,255,255,.55));
  --grad-accent:linear-gradient(135deg,#6c5ce7,#00b8d4);
  --font-sans:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  --maxw:1180px;
  --header-h:72px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

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

html{
  scroll-behavior:smooth;
  scroll-padding-top:calc(var(--header-h) + 16px);
  -webkit-text-size-adjust:100%;
}

body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  background-image:
    radial-gradient(1200px 600px at 100% -10%,rgba(255,90,60,.10),transparent 60%),
    radial-gradient(900px 500px at -10% 20%,rgba(108,92,231,.10),transparent 60%),
    radial-gradient(800px 500px at 50% 110%,rgba(255,209,102,.14),transparent 60%);
  background-attachment:fixed;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}

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

a{
  color:var(--brand);
  text-decoration:none;
  transition:color .25s var(--ease),opacity .25s var(--ease);
}

a:hover{
  color:var(--brand-2);
}

a:focus-visible,
button:focus-visible,
summary:focus-visible{
  outline:3px solid rgba(108,92,231,.55);
  outline-offset:3px;
  border-radius:6px;
}

h1,h2,h3,h4{
  line-height:1.3;
  color:var(--text);
  margin:0 0 .6em;
  font-weight:800;
  letter-spacing:-.01em;
}

h1{
  font-size:clamp(1.7rem,4.2vw,2.85rem);
  letter-spacing:-.02em;
}

h2{
  font-size:clamp(1.35rem,2.8vw,2rem);
  position:relative;
  padding-bottom:.5em;
}

h2::after{
  content:"";
  position:absolute;
  left:0;
  bottom:0;
  width:64px;
  height:4px;
  border-radius:4px;
  background:var(--grad-hero);
  transition:width .5s var(--ease);
}

section:hover > h2::after,
section:focus-within > h2::after{
  width:110px;
}

h3{
  font-size:clamp(1.1rem,2vw,1.35rem);
  margin-top:1.4em;
}

h4{
  font-size:1.02rem;
  color:var(--brand);
  margin-top:1.1em;
}

p{
  margin:0 0 1em;
  color:var(--text-soft);
}

strong{
  color:var(--text);
  font-weight:700;
}

em{
  font-style:normal;
  color:var(--brand);
  font-weight:600;
  background:linear-gradient(transparent 62%,rgba(255,209,102,.55) 62%);
  padding:0 2px;
}

ul,ol{
  margin:0 0 1.2em;
  padding-left:1.4em;
  color:var(--text-soft);
}

li{
  margin:.35em 0;
}

li::marker{
  color:var(--brand);
}

blockquote{
  margin:1.2em 0;
  padding:1em 1.4em;
  border-left:4px solid var(--brand);
  border-radius:0 var(--radius-md) var(--radius-md) 0;
  background:var(--surface-glass);
  backdrop-filter:blur(14px) saturate(160%);
  -webkit-backdrop-filter:blur(14px) saturate(160%);
  color:var(--text-soft);
  box-shadow:var(--shadow-sm);
  transition:transform .35s var(--ease),box-shadow .35s var(--ease);
}

blockquote:hover{
  transform:translateX(6px);
  box-shadow:var(--shadow-md);
}

blockquote p{
  margin:0;
}

time{
  display:inline-block;
  font-size:.85rem;
  color:var(--text-muted);
  background:rgba(108,92,231,.1);
  padding:.1em .7em;
  border-radius:999px;
  margin-bottom:.5em;
}

.sr-only{
  position:absolute;
  width:1px;
  height:1px;
  padding:0;
  margin:-1px;
  overflow:hidden;
  clip:rect(0,0,0,0);
  white-space:nowrap;
  border:0;
}

/* ================= Header ================= */
header[role="banner"]{
  position:sticky;
  top:0;
  z-index:100;
  background:var(--surface-glass);
  backdrop-filter:blur(20px) saturate(180%);
  -webkit-backdrop-filter:blur(20px) saturate(180%);
  border-bottom:1px solid var(--border);
  box-shadow:0 4px 24px rgba(31,29,43,.05);
  transition:background .35s var(--ease),box-shadow .35s var(--ease);
}

.brand-bar{
  max-width:var(--maxw);
  margin:0 auto;
  padding:.7rem 1.25rem;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:1rem;
  flex-wrap:wrap;
  min-height:var(--header-h);
}

.logo{
  display:flex;
  align-items:center;
  gap:.6rem;
  flex-wrap:wrap;
}

.logo svg{
  flex:0 0 auto;
  border-radius:12px;
  box-shadow:0 6px 18px rgba(255,90,60,.35);
  transition:transform .45s var(--ease),box-shadow .45s var(--ease);
}

.logo:hover svg{
  transform:rotate(-6deg) scale(1.06);
  box-shadow:0 10px 26px rgba(255,90,60,.5);
}

.brand-name{
  font-size:1.2rem;
  font-weight:900;
  letter-spacing:.02em;
  background:var(--grad-hero);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
  white-space:nowrap;
}

.brand-domain{
  font-size:.74rem;
  font-weight:600;
  color:var(--text-muted);
  background:rgba(31,29,43,.06);
  padding:.12em .6em;
  border-radius:999px;
  letter-spacing:.02em;
  white-space:nowrap;
}

nav[aria-label="主导航"]{
  flex:1 1 auto;
  min-width:0;
}

.main-nav{
  list-style:none;
  margin:0;
  padding:0;
  display:flex;
  flex-wrap:wrap;
  gap:.15rem;
  justify-content:flex-end;
}

.main-nav li{
  margin:0;
}

.main-nav a{
  display:inline-block;
  padding:.42em .78em;
  font-size:.86rem;
  font-weight:600;
  color:var(--text-soft);
  border-radius:999px;
  position:relative;
  transition:color .25s var(--ease),background .25s var(--ease),transform .25s var(--ease);
}

.main-nav a::before{
  content:"";
  position:absolute;
  inset:0;
  border-radius:999px;
  background:var(--grad-hero);
  opacity:0;
  transform:scale(.7);
  transition:opacity .3s var(--ease),transform .3s var(--ease);
  z-index:-1;
}

.main-nav a:hover{
  color:#fff;
  transform:translateY(-2px);
}

.main-nav a:hover::before{
  opacity:1;
  transform:scale(1);
}

/* ================= Main Layout ================= */
main{
  max-width:var(--maxw);
  margin:0 auto;
  padding:1.5rem 1.25rem 3rem;
  display:flex;
  flex-direction:column;
  gap:1.6rem;
}

main > section{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  padding:clamp(1.25rem,3vw,2.5rem);
  box-shadow:var(--shadow-sm);
  position:relative;
  overflow:hidden;
  transition:box-shadow .4s var(--ease),transform .4s var(--ease),border-color .4s var(--ease);
}

main > section::before{
  content:"";
  position:absolute;
  top:0;
  left:0;
  right:0;
  height:3px;
  background:var(--grad-banner);
  opacity:.85;
}

main > section:hover{
  box-shadow:var(--shadow-md);
  border-color:rgba(255,90,60,.22);
}

/* ================= Hero ================= */
#hero{
  background:var(--grad-hero);
  color:#fff;
  border:none;
  padding:clamp(1.6rem,4vw,3.4rem);
  border-radius:var(--radius-xl);
  box-shadow:0 26px 70px rgba(255,90,60,.32);
  isolation:isolate;
}

#hero::before{
  content:"";
  position:absolute;
  inset:0;
  background:
    radial-gradient(600px 300px at 85% 10%,rgba(255,255,255,.35),transparent 60%),
    radial-gradient(500px 280px at 10% 90%,rgba(108,92,231,.35),transparent 65%);
  z-index:-1;
  pointer-events:none;
}

#hero::after{
  display:none;
}

#hero h1{
  color:#fff;
  text-shadow:0 4px 24px rgba(120,30,10,.28);
  margin-bottom:.7em;
}

#hero .hero-lead{
  color:rgba(255,255,255,.94);
  font-size:clamp(.95rem,1.6vw,1.06rem);
  line-height:1.85;
  max-width:78ch;
}

#hero .hero-lead strong{
  color:#fff;
  background:rgba(255,255,255,.18);
  padding:0 .3em;
  border-radius:6px;
}

#hero .hero-lead em{
  color:#fff;
  background:linear-gradient(transparent 62%,rgba(255,255,255,.28) 62%);
}

.hero-actions{
  display:flex;
  flex-wrap:wrap;
  gap:.9rem;
  margin:1.6rem 0 1.8rem;
}

.btn-primary,
.btn-secondary{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.4em;
  padding:.8em 1.7em;
  font-size:.98rem;
  font-weight:700;
  border-radius:999px;
  cursor:pointer;
  border:2px solid transparent;
  transition:transform .3s var(--ease),box-shadow .3s var(--ease),background .3s var(--ease),color .3s var(--ease);
  will-change:transform;
}

.btn-primary{
  background:#fff;
  color:var(--brand);
  box-shadow:0 12px 30px rgba(120,30,10,.28);
}

.btn-primary:hover{
  color:var(--brand);
  transform:translateY(-3px) scale(1.03);
  box-shadow:0 18px 40px rgba(120,30,10,.36);
}

.btn-secondary{
  background:rgba(255,255,255,.16);
  color:#fff;
  border-color:rgba(255,255,255,.7);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
}

.btn-secondary:hover{
  color:#fff;
  background:rgba(255,255,255,.28);
  transform:translateY(-3px) scale(1.03);
}

.hero-stats{
  list-style:none;
  margin:0;
  padding:0;
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:.8rem;
}

.hero-stats li{
  margin:0;
  padding:1rem .8rem;
  text-align:center;
  border-radius:var(--radius-md);
  background:rgba(255,255,255,.16);
  border:1px solid rgba(255,255,255,.3);
  backdrop-filter:blur(12px) saturate(160%);
  -webkit-backdrop-filter:blur(12px) saturate(160%);
  transition:transform .35s var(--ease),background .35s var(--ease);
}

.hero-stats li:hover{
  transform:translateY(-5px);
  background:rgba(255,255,255,.26);
}

.stat-num{
  display:block;
  font-size:clamp(1.35rem,3vw,1.9rem);
  font-weight:900;
  line-height:1.1;
  color:#fff;
  letter-spacing:-.02em;
}

.stat-num::after{
  content:"+";
  font-size:.6em;
  opacity:.85;
  margin-left:1px;
}

.hero-stats li:last-child .stat-num::after{
  content:"";
}

.stat-label{
  display:block;
  font-size:.78rem;
  color:rgba(255,255,255,.9);
  margin-top:.25em;
  font-weight:600;
}

/* ================= Banner Carousel ================= */
#banner{
  background:var(--grad-banner);
  border:none;
  color:#fff;
  padding:0;
  overflow:hidden;
}

#banner::before{
  display:none;
}

#banner h2{
  display:none;
}

.carousel{
  display:flex;
  gap:1rem;
  padding:clamp(1.1rem,2.6vw,1.8rem);
  overflow-x:auto;
  scroll-snap-type:x mandatory;
  scrollbar-width:none;
  -ms-overflow-style:none;
}

.carousel::-webkit-scrollbar{
  display:none;
}

.slide{
  flex:0 0 min(420px,86%);
  scroll-snap-align:center;
  padding:1.4rem 1.5rem;
  border-radius:var(--radius-lg);
  background:rgba(255,255,255,.14);
  border:1px solid rgba(255,255,255,.32);
  backdrop-filter:blur(16px) saturate(170%);
  -webkit-backdrop-filter:blur(16px) saturate(170%);
  box-shadow:0 14px 40px rgba(20,10,40,.18);
  transition:transform .4s var(--ease),background .4s var(--ease),box-shadow .4s var(--ease);
}

.slide:hover{
  transform:translateY(-6px);
  background:rgba(255,255,255,.22);
  box-shadow:0 22px 50px rgba(20,10,40,.28);
}

.slide.active{
  background:rgba(255,255,255,.26);
  border-color:rgba(255,255,255,.6);
}

.slide h3{
  color:#fff;
  margin-top:0;
  font-size:1.2rem;
}

.slide p{
  color:rgba(255,255,255,.92);
  margin:0;
  font-size:.92rem;
}

/* ================= Intro ================= */
#intro h3{
  color:var(--text);
  border-left:4px solid var(--brand);
  padding-left:.7em;
}

/* ================= Products ================= */
#products > ul{
  list-style:none;
  padding:0;
  margin:1.2rem 0 0;
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(220px,1fr));
  gap:.9rem;
}

#products > ul li{
  margin:0;
  padding:1rem 1.1rem;
  background:var(--surface-glass);
  border:1px solid var(--border);
  border-radius:var(--radius-md);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  box-shadow:var(--shadow-sm);
  transition:transform .35s var(--ease),box-shadow .35s var(--ease),border-color .35s var(--ease);
  position:relative;
  overflow:hidden;
}

#products > ul li::before{
  content:"";
  position:absolute;
  left:0;
  top:0;
  bottom:0;
  width:4px;
  background:var(--grad-hero);
  transform:scaleY(0);
  transform-origin:top;
  transition:transform .35s var(--ease);
}

#products > ul li:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow-md);
  border-color:rgba(255,90,60,.3);
}

#products > ul li:hover::before{
  transform:scaleY(1);
}

/* ================= Solutions / Cases / Knowledge ================= */
#solutions h3,
#cases h3,
#knowledge h3{
  color:var(--accent);
  display:inline-block;
  padding:.05em .5em;
  border-radius:8px;
  background:linear-gradient(120deg,rgba(108,92,231,.1),rgba(0,184,212,.1));
}

#cases blockquote{
  background:linear-gradient(135deg,rgba(255,90,60,.08),rgba(255,209,102,.1));
}

/* ================= News ================= */
#news{
  background:linear-gradient(160deg,rgba(108,92,231,.06),rgba(255,255,255,.9));
}

#news article{
  padding:1rem 1.2rem;
  margin-bottom:.9rem;
  border-radius:var(--radius-md);
  background:var(--surface);
  border:1px solid var(--border);
  box-shadow:var(--shadow-sm);
  transition:transform .3s var(--ease),box-shadow .3s var(--ease),border-color .3s var(--ease);
}

#news article:hover{
  transform:translateX(6px);
  box-shadow:var(--shadow-md);
  border-color:rgba(108,92,231,.3);
}

#news article h3{
  margin-top:0;
  font-size:1.05rem;
}

#news article p:last-child{
  margin-bottom:0;
}

/* ================= Articles ================= */
#articles{
  display:block;
}

#articles > article{
  position:relative;
  padding:1.2rem 1.3rem 1.2rem 1.6rem;
  margin-bottom:1rem;
  border-radius:var(--radius-md);
  background:var(--surface-glass);
  border:1px solid var(--border);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  box-shadow:var(--shadow-sm);
  transition:transform .35s var(--ease),box-shadow .35s var(--ease),border-color .35s var(--ease),background .35s var(--ease);
  overflow:hidden;
}

#articles > article::before{
  content:"";
  position:absolute;
  left:0;
  top:0;
  bottom:0;
  width:5px;
  background:var(--grad-accent);
  opacity:.7;
  transition:opacity .35s var(--ease),width .35s var(--ease);
}

#articles > article:hover{
  transform:translateY(-5px);
  box-shadow:var(--shadow-lg);
  border-color:rgba(108,92,231,.35);
  background:var(--surface-glass-strong);
}

#articles > article:hover::before{
  opacity:1;
  width:8px;
}

#articles > article h3{
  margin-top:0;
  font-size:1.08rem;
  transition:color .3s var(--ease);
}

#articles > article:hover h3{
  color:var(--brand);
}

#articles > article p{
  font-size:.94rem;
}

#articles > article a{
  display:inline-flex;
  align-items:center;
  gap:.3em;
  font-weight:700;
  font-size:.9rem;
  padding:.35em 1em;
  border-radius:999px;
  background:var(--grad-hero);
  color:#fff;
  box-shadow:0 6px 18px rgba(255,90,60,.3);
  transition:transform .3s var(--ease),box-shadow .3s var(--ease),filter .3s var(--ease);
}

#articles > article a::after{
  content:"→";
  transition:transform .3s var(--ease);
}

#articles > article a:hover{
  color:#fff;
  transform:translateY(-2px);
  box-shadow:0 10px 26px rgba(255,90,60,.45);
  filter:brightness(1.05);
}

#articles > article a:hover::after{
  transform:translateX(4px);
}

/* ================= FAQ ================= */
#faq details{
  margin-bottom:.75rem;
  border-radius:var(--radius-md);
  border:1px solid var(--border);
  background:var(--surface-glass);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  box-shadow:var(--shadow-sm);
  overflow:hidden;
  transition:box-shadow .35s var(--ease),border-color .35s var(--ease),background .35s var(--ease);
}

#faq details[open]{
  border-color:rgba(255,90,60,.35);
  background:var(--surface-glass-strong);
  box-shadow:var(--shadow-md);
}

#faq details:hover{
  border-color:rgba(255,90,60,.28);
}

#faq summary{
  cursor:pointer;
  padding:.9rem 2.6rem .9rem 1.1rem;
  font-weight:700;
  color:var(--text);
  list-style:none;
  position:relative;
  transition:color .25s var(--ease),background .25s var(--ease);
  user-select:none;
}

#faq summary::-webkit-details-marker{
  display:none;
}

#faq summary::after{
  content:"+";
  position:absolute;
  right:1rem;
  top:50%;
  transform:translateY(-50%);
  width:1.6rem;
  height:1.6rem;
  line-height:1.5rem;
  text-align:center;
  font-size:1.1rem;
  font-weight:700;
  color:var(--brand);
  background:rgba(255,90,60,.12);
  border-radius:50%;
  transition:transform .35s var(--ease),background .35s var(--ease),color .35s var(--ease);
}

#faq details[open] summary::after{
  content:"−";
  transform:translateY(-50%) rotate(180deg);
  background:var(--grad-hero);
  color:#fff;
}

#faq summary:hover{
  color:var(--brand);
  background:rgba(255,90,60,.05);
}

#faq details p{
  padding:0 1.1rem 1rem;
  margin:0;
  font-size:.94rem;
  animation:fadeSlide .4s var(--ease);
}

/* ================= HowTo ================= */
#howto ol{
  counter-reset:step;
  list-style:none;
  padding-left:0;
}

#howto ol li{
  counter-increment:step;
  position:relative;
  padding:.6rem 0 .6rem 2.6rem;
  margin:.3rem 0;
  transition:transform .3s var(--ease);
}

#howto ol li::before{
  content:counter(step);
  position:absolute;
  left:0;
  top:.55rem;
  width:1.8rem;
  height:1.8rem;
  line-height:1.8rem;
  text-align:center;
  font-size:.85rem;
  font-weight:800;
  color:#fff;
  border-radius:50%;
  background:var(--grad-accent);
  box-shadow:0 4px 14px rgba(108,92,231,.35);
  transition:transform .3s var(--ease);
}

#howto ol li:hover{
  transform:translateX(6px);
}

#howto ol li:hover::before{
  transform:scale(1.12);
}

#howto ul li{
  padding-left:.2em;
}

/* ================= Notes ================= */
#notes{
  background:linear-gradient(160deg,rgba(255,209,102,.12),rgba(255,255,255,.9));
}

/* ================= Contact ================= */
#contact ul{
  list-style:none;
  padding:0;
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(240px,1fr));
  gap:.7rem;
}

#contact ul li{
  margin:0;
  padding:.75rem 1rem;
  border-radius:var(--radius-sm);
  background:var(--surface-glass);
  border:1px solid var(--border);
  font-size:.92rem;
  transition:transform .3s var(--ease),border-color .3s var(--ease),box-shadow .3s var(--ease);
  word-break:break-word;
}

#contact ul li:hover{
  transform:translateY(-3px);
  border-color:rgba(255,90,60,.3);
  box-shadow:var(--shadow-sm);
}

/* ================= Sitemap / Links ================= */
#sitemap ul,
#links ul{
  list-style:none;
  padding:0;
  display:flex;
  flex-wrap:wrap;
  gap:.5rem;
}

#sitemap li,
#links li{
  margin:0;
}

#sitemap a,
#links a{
  display:inline-block;
  padding:.4em 1em;
  font-size:.88rem;
  font-weight:600;
  color:var(--text-soft);
  border-radius:999px;
  background:rgba(31,29,43,.05);
  border:1px solid transparent;
  transition:transform .3s var(--ease),background .3s var(--ease),color .3s var(--ease),border-color .3s var(--ease);
}

#sitemap a:hover,
#links a:hover{
  color:#fff;
  background:var(--grad-hero);
  border-color:transparent;
  transform:translateY(-3px);
  box-shadow:0 8px 20px rgba(255,90,60,.3);
}

/* ================= Legal Sections ================= */
#privacy,
#disclaimer,
#copyright,
#pageinfo,
#team{
  background:var(--surface-glass);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
}

#pageinfo ul{
  list-style:none;
  padding:0;
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(260px,1fr));
  gap:.5rem;
}

#pageinfo li{
  margin:0;
  padding:.5rem .9rem;
  border-radius:var(--radius-sm);
  background:rgba(108,92,231,.07);
  font-size:.9rem;
}

/* ================= Footer ================= */
footer[role="contentinfo"]{
  background:linear-gradient(160deg,#1f1d2b,#2b2640 55%,#221f33);
  color:rgba(255,255,255,.72);
  margin-top:2rem;
  position:relative;
  overflow:hidden;
}

footer[role="contentinfo"]::before{
  content:"";
  position:absolute;
  top:0;
  left:0;
  right:0;
  height:4px;
  background:var(--grad-banner);
}

.footer-inner{
  max-width:var(--maxw);
  margin:0 auto;
  padding:2.4rem 1.25rem 2rem;
  text-align:center;
  position:relative;
}

.footer-inner p{
  color:rgba(255,255,255,.72);
  margin:.5em 0;
  font-size:.9rem;
}

.footer-inner p:first-child{
  color:rgba(255,255,255,.92);
  font-weight:600;
}

.footer-inner a{
  color:rgba(255,255,255,.8);
  font-weight:600;
  padding:.1em .3em;
  border-radius:6px;
  transition:color .25s var(--ease),background .25s var(--ease);
}

.footer-inner a:hover{
  color:#fff;
  background:rgba(255,255,255,.12);
}

/* ================= Back to Top ================= */
.back-to-top{
  position:fixed;
  right:1.1rem;
  bottom:1.1rem;
  z-index:90;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding:.7em 1.1em;
  font-size:.82rem;
  font-weight:700;
  color:#fff;
  background:var(--grad-hero);
  border-radius:999px;
  box-shadow:0 12px 30px rgba(255,90,60,.4);
  opacity:.92;
  transition:transform .3s var(--ease),box-shadow .3s var(--ease),opacity .3s var(--ease);
}

.back-to-top:hover{
  color:#fff;
  opacity:1;
  transform:translateY(-4px) scale(1.05);
  box-shadow:0 18px 40px rgba(255,90,60,.55);
}

/* ================= Animations ================= */
@keyframes fadeSlide{
  from{
    opacity:0;
    transform:translateY(-6px);
  }
  to{
    opacity:1;
    transform:translateY(0);
  }
}

@keyframes riseIn{
  from{
    opacity:0;
    transform:translateY(28px);
  }
  to{
    opacity:1;
    transform:translateY(0);
  }
}

@keyframes floatSoft{
  0%,100%{
    transform:translateY(0);
  }
  50%{
    transform:translateY(-8px);
  }
}

main > section{
  animation:riseIn .7s var(--ease) both;
}

main > section:nth-child(1){animation-delay:.02s;}
main > section:nth-child(2){animation-delay:.06s;}
main > section:nth-child(3){animation-delay:.1s;}
main > section:nth-child(4){animation-delay:.14s;}
main > section:nth-child(5){animation-delay:.18s;}
main > section:nth-child(6){animation-delay:.22s;}
main > section:nth-child(7){animation-delay:.26s;}
main > section:nth-child(8){animation-delay:.3s;}
main > section:nth-child(9){animation-delay:.34s;}
main > section:nth-child(10){animation-delay:.38s;}
main > section:nth-child(11){animation-delay:.42s;}
main > section:nth-child(12){animation-delay:.46s;}
main > section:nth-child(n+13){animation-delay:.5s;}

@supports (animation-timeline:view()){
  main > section{
    animation:riseIn .8s var(--ease) both;
    animation-timeline:view();
    animation-range:entry 0% entry 40%;
  }
}

/* ================= Dark Mode ================= */
@media (prefers-color-scheme:dark){
  :root{
    --bg:#121019;
    --bg-soft:#16131f;
    --surface:#1b1825;
    --surface-glass:rgba(38,34,52,.62);
    --surface-glass-strong:rgba(46,41,62,.85);
    --text:#f2effa;
    --text-soft:#c3bdd4;
    --text-muted:#8f89a3;
    --border:rgba(255,255,255,.1);
    --shadow-sm:0 2px 10px rgba(0,0,0,.35);
    --shadow-md:0 12px 34px rgba(0,0,0,.45);
    --shadow-lg:0 26px 64px rgba(0,0,0,.55);
  }

  body{
    background-image:
      radial-gradient(1200px 600px at 100% -10%,rgba(255,90,60,.16),transparent 60%),
      radial-gradient(900px 500px at -10% 20%,rgba(108,92,231,.18),transparent 60%),
      radial-gradient(800px 500px at 50% 110%,rgba(255,209,102,.1),transparent 60%);
  }

  header[role="banner"]{
    box-shadow:0 4px 24px rgba(0,0,0,.4);
  }

  .brand-domain{
    background:rgba(255,255,255,.1);
    color:var(--text-muted);
  }

  main > section{
    background:var(--surface);
  }

  #hero{
    background:linear-gradient(135deg,#e0472c 0%,#b8442f 40%,#8a5a2a 100%);
    box-shadow:0 26px 70px rgba(0,0,0,.5);
  }

  #news{
    background:linear-gradient(160deg,rgba(108,92,231,.16),rgba(27,24,37,.95));
  }

  #notes{
    background:linear-gradient(160deg,rgba(255,209,102,.1),rgba(27,24,37,.95));
  }

  #news article{
    background:var(--surface-glass);
  }

  #sitemap a,
  #links a{
    background:rgba(255,255,255,.07);
    color:var(--text-soft);
  }

  #pageinfo li{
    background:rgba(108,92,231,.16);
  }

  footer[role="contentinfo"]{
    background:linear-gradient(160deg,#0d0b13,#1a1626 55%,#100d18);
  }

  #faq summary:hover{
    background:rgba(255,90,60,.1);
  }
}

/* ================= Responsive ================= */
@media (max-width:900px){
  .brand-bar{
    flex-direction:column;
    align-items:flex-start;
    gap:.6rem;
  }

  nav[aria-label="主导航"]{
    width:100%;
  }

  .main-nav{
    justify-content:flex-start;
    gap:.2rem;
  }

  .hero-stats{
    grid-template-columns:repeat(2,1fr);
  }
}

@media (max-width:680px){
  body{
    font-size:15px;
    line-height:1.72;
  }

  main{
    padding:1rem .8rem 2.4rem;
    gap:1.1rem;
  }

  main > section{
    border-radius:var(--radius-md);
    padding:1.15rem 1rem;
  }

  #hero{
    border-radius:var(--radius-lg);
    padding:1.4rem 1.1rem;
  }

  .brand-bar{
    padding:.6rem .9rem;
  }

  .brand-name{
    font-size:1.05rem;
  }

  .brand-domain{
    font-size:.68rem;
  }

  .main-nav{
    flex-wrap:nowrap;
    overflow-x:auto;
    scrollbar-width:none;
    padding-bottom:.2rem;
    -webkit-overflow-scrolling:touch;
  }

  .main-nav::-webkit-scrollbar{
    display:none;
  }

  .main-nav a{
    white-space:nowrap;
    font-size:.8rem;
    padding:.38em .7em;
  }

  h2::after{
    width:48px;
    height:3px;
  }

  .hero-actions{
    gap:.6rem;
  }

  .btn-primary,
  .btn-secondary{
    flex:1 1 auto;
    padding:.75em 1.2em;
    font-size:.92rem;
  }

  .slide{
    flex:0 0 88%;
    padding:1.1rem 1.15rem;
  }

  #articles > article{
    padding:1rem 1rem 1rem 1.25rem;
  }

  #sitemap ul,
  #links ul{
    gap:.4rem;
  }

  #sitemap a,
  #links a{
    font-size:.8rem;
    padding:.35em .8em;
  }

  .back-to-top{
    right:.75rem;
    bottom:.75rem;
    padding:.6em .95em;
    font-size:.75rem;
  }

  .footer-inner{
    padding:1.8rem 1rem 1.6rem;
  }
}

@media (max-width:420px){
  .hero-stats{
    grid-template-columns:1fr 1fr;
    gap:.55rem;
  }

  .hero-stats li{
    padding:.75rem .5rem;
  }

  .stat-label{
    font-size:.7rem;
  }

  #contact ul{
    grid-template-columns:1fr;
  }
}

/* ================= Accessibility / 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;
    scroll-behavior:auto !important;
  }
}

@media print{
  header[role="banner"],
  .back-to-top,
  footer[role="contentinfo"],
  #banner{
    display:none !important;
  }

  body{
    background:#fff;
    color:#000;
  }

  main > section{
    box-shadow:none;
    border:1px solid #ddd;
    break-inside:avoid;
  }
}