@import url('https://fonts.googleapis.com/css2?family=Figtree:wght@300;400;500;600;700&family=Noto+Sans:wght@300;400;500;700&display=swap');

:root{
  --ink:#1f1726;
  --purple:#56228b;
  --brown:#8b4513;
  --fg:#f3ecf7;
  --muted:#c3b1d4;
  --line:rgba(243,236,247,.15);
  --soft:rgba(255,255,255,.05);
  --wrap:1160px;
  --navh:112px;
}

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

html{
  scroll-behavior:smooth;
  -webkit-text-size-adjust:100%;
}
html.locked{overflow:hidden}

body{
  margin:0;
  font-family:'Figtree','Noto Sans','PingFang SC','Hiragino Sans GB','Microsoft YaHei',system-ui,sans-serif;
  font-size:17px;
  line-height:1.75;
  color:var(--fg);
  background-color:var(--ink);
  background-image:
    radial-gradient(62vw 58vw at 84% -10%, rgba(86,34,139,.55), transparent 66%),
    radial-gradient(52vw 52vw at 2% 26%, rgba(139,69,19,.30), transparent 72%),
    radial-gradient(74vw 52vw at 50% 112%, rgba(86,34,139,.32), transparent 72%);
  background-attachment:fixed;
  overflow-x:hidden;
}

body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  background-image:radial-gradient(rgba(255,255,255,.06) 1px, transparent 1px);
  background-size:22px 22px;
  opacity:.55;
}

img{max-width:100%}
p{margin:0 0 1em}
a{color:#e6d5f7}
a:hover{color:#fff}

:focus-visible{outline:2px solid #b98be8;outline-offset:3px;border-radius:10px}

/* ---------- 顶栏 ---------- */
.navwrap{position:sticky;top:0;z-index:70}

.top{
  display:grid;
  grid-template-columns:auto 1fr auto 1fr auto;
  align-items:center;
  gap:10px;
  padding:9px clamp(14px,3vw,34px);
  background:rgba(31,23,38,.9);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}

.burger{
  width:44px;height:44px;
  display:grid;place-content:center;gap:5px;
  padding:0;border:1px solid var(--line);border-radius:14px;
  background:var(--soft);color:var(--fg);cursor:pointer;
  transition:background .25s ease, transform .25s ease;
}
.burger span{display:block;width:18px;height:2px;border-radius:2px;background:currentColor;transition:transform .25s ease}
.burger:hover{background:rgba(255,255,255,.12);transform:translateY(-1px)}
.burger[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.burger[aria-expanded="true"] span:nth-child(2){opacity:0}
.burger[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

.brand{margin:0;text-align:center;font-size:19px;font-weight:600;letter-spacing:.02em}
.brand a{text-decoration:none;color:var(--fg);display:inline-flex;align-items:center;min-height:40px;padding:0 6px}
.brand a:hover{color:#fff}

.top-nav{display:none}
.top-nav ol{display:flex;align-items:center;gap:2px;margin:0;padding:0;list-style:none}
.top-nav-l{justify-self:start}
.top-nav-r{justify-self:end}
.top-nav a{
  display:flex;align-items:center;min-height:40px;padding:0 11px;
  font-size:16px;color:var(--muted);text-decoration:none;border-radius:12px;
  transition:color .2s ease, background .2s ease;
}
.top-nav a:hover{color:#fff;background:var(--soft)}

.cta-top{
  display:inline-flex;align-items:center;min-height:44px;padding:0 20px;
  border-radius:999px;font-size:16px;font-weight:500;text-decoration:none;
  color:#fff;background:linear-gradient(120deg,var(--purple),var(--brown));
  box-shadow:0 12px 26px -16px rgba(0,0,0,.95);
  transition:transform .25s ease, box-shadow .25s ease;
}
.cta-top:hover{transform:translateY(-2px);box-shadow:0 18px 32px -16px rgba(0,0,0,.95)}

/* ---------- 锚点条 ---------- */
.bar{
  background:rgba(36,26,46,.92);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
  overflow-x:auto;
  scrollbar-width:none;
}
.bar::-webkit-scrollbar{display:none}
.bar-nav ol{
  display:flex;gap:6px;margin:0;padding:5px clamp(12px,3vw,34px);
  list-style:none;width:max-content;min-width:100%;
}
.bar-nav a{
  display:flex;align-items:center;min-height:40px;padding:0 14px;
  font-size:16px;color:var(--muted);text-decoration:none;
  border-radius:999px;border:1px solid transparent;
  transition:color .2s ease, border-color .2s ease, background .2s ease;
}
.bar-nav a:hover,.bar-nav a.on{color:#fff;background:rgba(86,34,139,.4);border-color:rgba(185,139,232,.45)}

/* ---------- 全屏菜单 ---------- */
.menu{
  position:fixed;inset:0;z-index:90;
  display:grid;place-items:center;
  padding:80px 20px 40px;
  background:radial-gradient(70vw 70vw at 80% 10%, rgba(86,34,139,.55), transparent 70%),
             radial-gradient(60vw 60vw at 10% 90%, rgba(139,69,19,.4), transparent 70%),
             rgba(23,17,30,.985);
  opacity:0;visibility:hidden;
  transition:opacity .32s ease, visibility .32s ease;
  overflow-y:auto;
}
.menu.is-open{opacity:1;visibility:visible}
.menu-close{
  position:absolute;top:18px;right:18px;
  width:48px;height:48px;display:grid;place-content:center;gap:0;
  border:1px solid var(--line);border-radius:16px;background:var(--soft);
  color:var(--fg);cursor:pointer;
}
.menu-close span{display:block;width:20px;height:2px;background:currentColor}
.menu-close span:first-child{transform:rotate(45deg)}
.menu-close span:last-child{transform:translateY(-2px) rotate(-45deg)}

.menu-nav ol{list-style:none;margin:0;padding:0;display:grid;gap:6px;text-align:center}
.menu-nav a{
  display:flex;align-items:center;justify-content:center;min-height:52px;padding:4px 18px;
  font-size:clamp(19px,3.4vw,26px);font-weight:500;letter-spacing:.01em;
  color:var(--fg);text-decoration:none;border-radius:20px 8px 20px 8px;
  transition:background .2s ease, color .2s ease;
}
.menu-nav a:hover{background:rgba(86,34,139,.45);color:#fff}
.menu.is-open .menu-nav li{animation:rise .42s ease both}
.menu.is-open .menu-nav li:nth-child(2){animation-delay:.04s}
.menu.is-open .menu-nav li:nth-child(3){animation-delay:.08s}
.menu.is-open .menu-nav li:nth-child(4){animation-delay:.12s}
.menu.is-open .menu-nav li:nth-child(5){animation-delay:.16s}
.menu.is-open .menu-nav li:nth-child(6){animation-delay:.2s}
.menu.is-open .menu-nav li:nth-child(7){animation-delay:.24s}

@keyframes rise{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}

/* ---------- 首屏 ---------- */
.hero{
  position:relative;z-index:1;
  display:grid;grid-template-columns:minmax(0,1.02fr) minmax(0,1fr);
  align-items:center;gap:clamp(22px,4.5vw,60px);
  max-width:var(--wrap);margin:0 auto;
  min-height:calc(100svh - var(--navh));
  padding:clamp(22px,4vw,48px) clamp(16px,4vw,40px) clamp(36px,6vw,80px);
}
.hero-fig{margin:0;position:relative}
.hero-img{
  display:block;width:100%;height:100%;
  aspect-ratio:4/4.6;object-fit:cover;
  border-radius:46% 54% 42% 58% / 54% 42% 58% 46%;
  box-shadow:0 40px 70px -40px rgba(0,0,0,.95), 0 0 0 1px rgba(243,236,247,.12) inset;
}
.hero-copy{
  display:flex;flex-direction:column;align-items:flex-end;gap:24px;text-align:right;
}
.hero-copy h1{
  margin:0;font-size:clamp(2rem,4.9vw,3.7rem);line-height:1.14;
  font-weight:600;letter-spacing:-.015em;
  background:linear-gradient(175deg,#fff 20%,rgba(243,236,247,.74));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.btn{
  display:inline-flex;align-items:center;min-height:50px;padding:0 28px;
  border-radius:999px 20px 999px 20px;
  font-size:17px;font-weight:500;text-decoration:none;color:#fff;
  background:linear-gradient(120deg,var(--purple),var(--brown));
  box-shadow:0 18px 34px -20px rgba(0,0,0,.95);
  transition:transform .25s ease, box-shadow .25s ease;
}
.btn:hover{transform:translateY(-2px);box-shadow:0 24px 40px -20px rgba(0,0,0,.95)}

/* ---------- 正文流 ---------- */
.stream{
  position:relative;z-index:1;
  max-width:var(--wrap);margin:0 auto;
  padding:clamp(24px,4vw,44px) clamp(16px,4vw,40px) clamp(48px,7vw,90px);
  display:grid;grid-template-columns:minmax(0,1fr) 292px;
  gap:clamp(24px,4vw,52px);align-items:start;
}
.stream-main{min-width:0}
.stream-main > section{
  scroll-margin-top:calc(var(--navh) + 14px);
  padding:clamp(20px,3.4vw,40px) 0;
}
.stream-main > section + section{border-top:1px solid var(--line)}
.stream-main > section:first-child{padding-top:0}

.stream-main h2{
  margin:0 0 .55em;font-size:clamp(1.35rem,2.7vw,1.85rem);
  line-height:1.3;font-weight:600;letter-spacing:-.01em;color:#fff;
}
.stream-main h2::after{
  content:"";display:block;width:54px;height:6px;margin-top:12px;
  border-radius:6px;background:linear-gradient(90deg,var(--purple),var(--brown));
}
.stream-main h3{
  margin:1.4em 0 .4em;font-size:clamp(1.1rem,2vw,1.3rem);
  font-weight:600;color:#fff;
}
.stream-main p,.stream-main li{color:#e3d8ec}
.stream-main ul,.stream-main ol{padding-left:1.35em;margin:0 0 1em}
.stream-main li{margin:.3em 0}
.stream-main a{border-bottom:1px solid rgba(185,139,232,.5);text-decoration:none}
.stream-main a:hover{color:#fff;border-bottom-color:#fff}
.stream-main strong{color:#fff}
.stream-main blockquote{
  margin:1.2em 0;padding:16px 20px;
  background:var(--soft);border-left:3px solid var(--purple);
  border-radius:6px 18px 18px 6px;color:var(--muted);
}
.stream-main table{width:100%;border-collapse:collapse;margin:1em 0;font-size:16px}
.stream-main th,.stream-main td{border:1px solid var(--line);padding:10px 12px;text-align:left}
.stream-main th{background:rgba(86,34,139,.28);color:#fff}
.stream-main img{border-radius:18px;height:auto}
.stream-main figure{margin:1.2em 0}
.stream-main figcaption{font-size:16px;color:var(--muted)}
.stream-main > section{overflow-wrap:break-word}

/* ---------- 侧栏 ---------- */
.rail{
  position:sticky;top:calc(var(--navh) + 16px);
  padding:22px 20px;
  border:1px solid var(--line);
  border-radius:24px 12px 24px 14px;
  background:linear-gradient(165deg,rgba(86,34,139,.22),rgba(139,69,19,.12));
  box-shadow:0 26px 50px -34px rgba(0,0,0,.9);
}
.rail-h{margin:0 0 6px;font-size:19px;font-weight:600;color:#fff;letter-spacing:.01em}
.rail .subtitle{
  margin:0 0 16px;font-size:16px;line-height:1.65;color:var(--muted);
  padding-bottom:16px;border-bottom:1px solid var(--line);
}
.rail-nav ol{list-style:none;margin:0;padding:0;display:grid;gap:2px}
.rail-nav a{
  display:flex;align-items:center;min-height:40px;padding:0 12px;
  font-size:16px;color:var(--muted);text-decoration:none;
  border-radius:12px;transition:color .2s ease, background .2s ease;
}
.rail-nav a:hover{color:#fff;background:rgba(255,255,255,.09)}

/* ---------- 页脚 ---------- */
.foot{
  position:relative;z-index:1;
  display:flex;flex-wrap:wrap;align-items:center;gap:14px 26px;
  justify-content:space-between;
  padding:22px clamp(16px,4vw,40px);
  border-top:1px solid var(--line);
  background:rgba(15,11,20,.55);
}
.foot-brand{min-width:0}
.foot-logo{
  display:inline-flex;align-items:center;min-height:40px;
  font-size:18px;font-weight:600;color:#fff;text-decoration:none;
}
.foot-nav ol{display:flex;flex-wrap:wrap;gap:2px 4px;margin:0;padding:0;list-style:none}
.foot-nav a{
  display:flex;align-items:center;min-height:40px;padding:0 10px;
  font-size:16px;color:var(--muted);text-decoration:none;border-radius:10px;
}
.foot-nav a:hover{color:#fff;background:var(--soft)}
.foot-cta{
  display:inline-flex;align-items:center;min-height:48px;padding:0 24px;
  border-radius:999px;font-size:17px;font-weight:500;text-decoration:none;color:#fff;
  background:linear-gradient(120deg,var(--brown),var(--purple));
  box-shadow:0 16px 30px -20px rgba(0,0,0,.95);
  transition:transform .25s ease;
}
.foot-cta:hover{transform:translateY(-2px)}
.foot-copy{margin:0;font-size:16px;color:var(--muted)}

/* ---------- 断点 ---------- */
@media (min-width:1000px){
  .top-nav{display:block}
}

@media (max-width:960px){
  .stream{grid-template-columns:minmax(0,1fr)}
  .rail{position:static;order:2;margin-top:8px}
  .hero{grid-template-columns:minmax(0,1fr);min-height:0;padding-top:20px}
  .hero-fig{max-width:520px;margin:0 auto;width:100%}
  .hero-img{aspect-ratio:16/11}
  .hero-copy{align-items:flex-start;text-align:right;padding-bottom:6px}
  .hero-copy h1{font-size:clamp(1.85rem,7vw,2.7rem)}
}

@media (max-width:560px){
  .top{grid-template-columns:auto 1fr auto;gap:8px}
  .brand{font-size:17px}
  .cta-top{padding:0 15px;font-size:15px}
  .foot{flex-direction:column;align-items:flex-start;gap:10px}
  .foot-nav ol{column-gap:0}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms!important;animation-delay:0ms!important;transition-duration:.001ms!important}
}

button[aria-expanded]{min-width:44px;min-height:44px}