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

:root{
  --ink:#261717;
  --ink-deep:#190e0f;
  --red:#ff0000;
  --pink:#ff1493;
  --text:#f8ecec;
  --muted:#cfa9a9;
  --line:rgba(255,255,255,.13);
  --rail:280px;
  --radius:4px;
  --shadow:0 22px 46px -30px rgba(0,0,0,.95);
}

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

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

body{
  margin:0;
  min-height:100vh;
  font-family:'Be Vietnam Pro','Noto Sans',system-ui,-apple-system,'PingFang SC','Microsoft YaHei',sans-serif;
  font-size:17px;
  font-weight:400;
  line-height:1.8;
  color:var(--text);
  background:var(--ink-deep);
  overflow-x:hidden;
}

body::before{
  content:'';position:fixed;inset:-25%;z-index:-2;pointer-events:none;
  background:
    radial-gradient(42% 38% at 22% 18%, rgba(255,0,0,.46), transparent 72%),
    radial-gradient(38% 42% at 78% 14%, rgba(255,20,147,.44), transparent 72%),
    radial-gradient(48% 48% at 72% 82%, rgba(255,0,0,.28), transparent 74%),
    radial-gradient(44% 44% at 16% 84%, rgba(255,20,147,.32), transparent 74%);
  filter:blur(38px) saturate(1.25);
  animation:drift 11s ease-in-out infinite alternate;
}

body::after{
  content:'';position:fixed;inset:0;z-index:-1;pointer-events:none;opacity:.5;
  background-image:
    linear-gradient(rgba(255,255,255,.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.055) 1px, transparent 1px);
  background-size:68px 68px;
  -webkit-mask-image:radial-gradient(72% 62% at 52% 18%, #000 18%, transparent 82%);
  mask-image:radial-gradient(72% 62% at 52% 18%, #000 18%, transparent 82%);
}

@keyframes drift{
  from{transform:translate3d(-3%,-2%,0) scale(1.04) rotate(0deg)}
  to{transform:translate3d(4%,3%,0) scale(1.14) rotate(6deg)}
}

@keyframes rise{
  from{opacity:0;transform:translateY(12px)}
  to{opacity:1;transform:none}
}

@keyframes floaty{
  from{transform:translate3d(0,0,0) scale(1)}
  to{transform:translate3d(0,-16px,0) scale(1.12)}
}

@keyframes spin{
  from{transform:rotate(0deg)}
  to{transform:rotate(360deg)}
}

a{color:#ffa8c9}
a:hover{color:#fff}

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

/* ---------- 左侧固定栏 ---------- */
.rail{
  position:fixed;inset:0 auto 0 0;width:var(--rail);z-index:30;
  display:flex;flex-direction:column;gap:16px;
  padding:20px 16px 22px;
  background:linear-gradient(180deg, rgba(38,23,23,.94), rgba(24,13,14,.88));
  border-right:1px solid var(--line);
  -webkit-backdrop-filter:blur(14px) saturate(1.15);
  backdrop-filter:blur(14px) saturate(1.15);
}

.rail-top{display:flex;align-items:center;justify-content:space-between;gap:10px}

.brand{display:flex;align-items:center;gap:9px;min-height:44px;text-decoration:none;color:var(--text)}
.brand-mark{
  width:32px;height:32px;flex:0 0 auto;border-radius:var(--radius);
  display:grid;place-items:center;object-fit:cover;
  background:linear-gradient(140deg, var(--red), var(--pink));
  box-shadow:0 10px 22px -14px rgba(255,20,147,.95);
}
.brand-mark--txt{color:#fff;font-weight:700;font-size:16px;line-height:1}
.brand-name{font-size:16px;font-weight:600;letter-spacing:.02em;white-space:nowrap}

.rail-cta{
  display:inline-flex;align-items:center;justify-content:center;
  min-height:40px;padding:0 12px;border-radius:var(--radius);
  background:linear-gradient(120deg, var(--red), var(--pink));
  color:#fff;font-weight:600;font-size:16px;text-decoration:none;white-space:nowrap;
  box-shadow:0 12px 26px -16px rgba(255,20,147,.95);
  transition:transform .2s ease, filter .2s ease;
}
.rail-cta:hover{color:#fff;transform:translateY(-1px);filter:saturate(1.25)}

.rail-nav{flex:1 1 auto;overflow-y:auto;overscroll-behavior:contain}
.rail-list{list-style:none;margin:0;padding:0;display:grid;gap:2px}
.rail-item{animation:rise .55s both}
.rail-item:nth-child(1){animation-delay:.04s}
.rail-item:nth-child(2){animation-delay:.09s}
.rail-item:nth-child(3){animation-delay:.14s}
.rail-item:nth-child(4){animation-delay:.19s}
.rail-item:nth-child(5){animation-delay:.24s}
.rail-item:nth-child(6){animation-delay:.29s}
.rail-item:nth-child(7){animation-delay:.34s}
.rail-item:nth-child(8){animation-delay:.39s}

.rail-item > a{
  display:flex;align-items:center;gap:9px;
  min-height:44px;padding:10px 10px;
  border-radius:var(--radius);
  color:#eddede;text-decoration:none;font-size:16px;
  border:1px solid transparent;
  transition:background .2s ease, border-color .2s ease, color .2s ease;
}
.rail-item > a:hover,
.rail-item > a[aria-current="true"]{
  background:linear-gradient(100deg, rgba(255,0,0,.22), rgba(255,20,147,.16));
  border-color:rgba(255,20,147,.4);
  color:#fff;
}
.rail-num{
  font-size:13px;letter-spacing:.08em;color:var(--pink);
  font-variant-numeric:tabular-nums;flex:0 0 auto;padding-top:1px;
}
.rail-txt{flex:1 1 auto}

.rail-sub{
  list-style:none;margin:2px 0 8px;padding:0 0 0 24px;
  display:grid;gap:1px;
  max-height:0;opacity:0;overflow:hidden;
  transition:max-height .35s ease, opacity .3s ease;
  border-left:1px dashed rgba(255,20,147,.35);
}
.rail-item.has-sub:hover .rail-sub,
.rail-item.has-sub:focus-within .rail-sub{max-height:180px;opacity:1}
.rail-sub a{
  display:block;padding:9px 8px;min-height:40px;
  color:var(--muted);text-decoration:none;font-size:15px;line-height:1.5;
}
.rail-sub a:hover{color:#fff}

/* ---------- 主区 ---------- */
main{margin-left:var(--rail)}

.hero{
  position:relative;overflow:hidden;
  min-height:100vh;
  display:grid;grid-template-columns:minmax(0,1.02fr) minmax(0,.98fr);
  align-items:center;gap:clamp(20px,4vw,54px);
  padding:clamp(64px,10vh,120px) clamp(20px,5vw,64px);
  scroll-margin-top:96px;
}

.hero-num{
  position:absolute;right:2%;top:50%;transform:translateY(-50%);
  font-size:clamp(170px,26vw,400px);font-weight:700;line-height:.76;
  letter-spacing:-.05em;color:transparent;
  -webkit-text-stroke:1px rgba(255,255,255,.15);
  pointer-events:none;user-select:none;z-index:0;
}

.hero-copy{position:relative;z-index:1;max-width:34rem}
.hero-copy > *{animation:rise .6s both}
.hero-copy > *:nth-child(1){animation-delay:.05s}
.hero-copy > *:nth-child(2){animation-delay:.13s}
.hero-copy > *:nth-child(3){animation-delay:.21s}
.hero-copy > *:nth-child(4){animation-delay:.29s}
.hero-copy > *:nth-child(5){animation-delay:.37s}

.eyebrow{
  display:inline-block;margin:0 0 16px;
  padding:5px 12px;border-radius:var(--radius);
  font-size:15px;letter-spacing:.06em;
  color:#ffd9ea;
  background:linear-gradient(100deg, rgba(255,0,0,.26), rgba(255,20,147,.2));
  border:1px solid rgba(255,20,147,.42);
}

.hero h1{
  margin:0 0 16px;
  font-size:clamp(32px,4.4vw,54px);
  line-height:1.2;font-weight:700;letter-spacing:-.01em;
  text-shadow:0 18px 46px rgba(0,0,0,.55);
}

.lede{margin:0 0 26px;color:#f0dcdc;font-size:17px;max-width:32ch}

.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:26px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  min-height:48px;padding:12px 22px;border-radius:var(--radius);
  font-size:17px;font-weight:600;text-decoration:none;
  transition:transform .2s ease, filter .2s ease, background .2s ease;
}
.btn-primary{
  background:linear-gradient(120deg, var(--red), var(--pink));
  color:#fff;box-shadow:0 20px 38px -22px rgba(255,20,147,1);
}
.btn-primary:hover{color:#fff;transform:translateY(-2px);filter:saturate(1.2)}
.btn-ghost{
  color:#fff;border:1px solid rgba(255,255,255,.35);
  background:rgba(255,255,255,.06);
  -webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);
}
.btn-ghost:hover{color:#fff;background:rgba(255,255,255,.14)}

.hero-chips{list-style:none;display:flex;flex-wrap:wrap;gap:8px;margin:0;padding:0}
.hero-chips li{
  padding:7px 12px;border-radius:var(--radius);
  font-size:15px;color:#e9d3d3;
  border:1px solid var(--line);background:rgba(255,255,255,.05);
}

.hero-fig{
  position:relative;z-index:1;margin:0;
  aspect-ratio:4/5;border-radius:var(--radius);overflow:hidden;
  border:1px solid rgba(255,255,255,.18);
  background:linear-gradient(160deg, #2a1216, #43121f 45%, #1d0d11);
  box-shadow:0 40px 80px -40px rgba(255,0,0,.6), var(--shadow);
  will-change:transform;
}
.aurora{position:absolute;border-radius:50%;filter:blur(26px) saturate(1.3);mix-blend-mode:screen}
.a1{
  width:78%;height:60%;left:-12%;top:6%;
  background:radial-gradient(circle at 40% 40%, rgba(255,0,0,.95), transparent 68%);
  animation:floaty 9s ease-in-out infinite alternate;
}
.a2{
  width:72%;height:62%;right:-14%;top:34%;
  background:radial-gradient(circle at 50% 50%, rgba(255,20,147,.95), transparent 68%);
  animation:floaty 12s ease-in-out infinite alternate-reverse;
}
.a3{
  width:130%;height:130%;left:-15%;top:-25%;
  background:conic-gradient(from 20deg, rgba(255,0,0,.5), rgba(255,20,147,.5), rgba(255,0,0,.5));
  opacity:.32;filter:blur(34px);
  animation:spin 26s linear infinite;
}
.hero-fig figcaption{
  position:absolute;inset:auto 0 0 0;
  padding:16px 16px 18px;
  font-size:15px;line-height:1.6;color:#ffe6ef;
  background:linear-gradient(180deg, transparent, rgba(20,10,12,.88));
}

/* ---------- 正文 + 右侧边栏 ---------- */
.board{
  display:grid;grid-template-columns:minmax(0,1fr) 296px;
  gap:clamp(24px,4vw,56px);align-items:start;
  padding:6px clamp(20px,5vw,64px) 72px;
}

.board-main{min-width:0}
.board-main > div{
  padding:clamp(34px,5vw,58px) 0;
  scroll-margin-top:96px;
  border-top:1px solid var(--line);
}
.board-main > div:first-child{border-top:0;padding-top:8px}

.board-main h2{
  margin:0 0 14px;font-size:clamp(23px,2.4vw,30px);
  line-height:1.32;font-weight:700;letter-spacing:-.01em;
  scroll-margin-top:96px;
}
.board-main h3{margin:24px 0 10px;font-size:20px;line-height:1.4;font-weight:600}
.board-main h2 > span,.side-h > span,.foot-h > span{
  background:linear-gradient(92deg, #ff5a5a, var(--pink));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}

.board-main p{margin:0 0 15px;color:#eedcdc;max-width:64ch}
.board-main ul,.board-main ol{margin:0 0 16px;padding-left:20px;max-width:64ch}
.board-main li{margin:0 0 8px}
.board-main li::marker{color:var(--pink)}
.board-main strong{color:#fff;font-weight:600}
.board-main figure,.board-main aside{
  margin:20px 0;padding:16px 18px;
  border:1px solid var(--line);border-radius:var(--radius);
  background:rgba(255,255,255,.05);box-shadow:var(--shadow);
}
.board-main figure img,.board-main img{max-width:100%;height:auto;border-radius:var(--radius);display:block}
.board-main blockquote{
  margin:20px 0;padding:14px 18px;border-left:3px solid var(--pink);
  background:rgba(255,20,147,.09);border-radius:var(--radius);color:#f6e5ea;
}
.board-main blockquote p:last-child{margin-bottom:0}
.board-main hr{border:0;border-top:1px dashed var(--line);margin:26px 0}

.board-side{
  position:sticky;top:24px;
  padding:20px 18px;border-radius:var(--radius);
  border:1px solid rgba(255,20,147,.32);
  background:linear-gradient(168deg, rgba(255,0,0,.16), rgba(255,20,147,.11) 48%, rgba(255,255,255,.05));
  box-shadow:var(--shadow);
}
.side-h{margin:0 0 12px;font-size:18px;line-height:1.4}
.side-list{list-style:none;margin:0;padding:0;display:grid}
.side-list li{animation:rise .5s both}
.side-list li:nth-child(1){animation-delay:.1s}
.side-list li:nth-child(2){animation-delay:.16s}
.side-list li:nth-child(3){animation-delay:.22s}
.side-list li:nth-child(4){animation-delay:.28s}
.side-list li:nth-child(5){animation-delay:.34s}
.side-list a{
  display:flex;align-items:center;gap:8px;min-height:44px;
  padding:8px 4px;font-size:16px;text-decoration:none;color:#f4e2e2;
  border-bottom:1px dashed rgba(255,255,255,.12);
  transition:padding-left .2s ease, color .2s ease;
}
.side-list a::before{content:'';width:6px;height:6px;border-radius:50%;background:var(--pink);flex:0 0 auto}
.side-list a:hover{color:#fff;padding-left:10px}
.side-note{
  margin:14px 0 0;font-size:15px;line-height:1.7;color:#e2c6c6;
  padding-top:12px;border-top:1px solid var(--line);
}

/* ---------- 页脚 ---------- */
.foot{
  margin-left:var(--rail);
  padding:26px clamp(20px,5vw,64px) 40px;
  border-top:1px solid var(--line);
  background:rgba(19,10,11,.62);
}
.foot-h{margin:0 0 12px;font-size:16px;letter-spacing:.04em}
.foot-grid{display:flex;flex-wrap:wrap;gap:10px 34px;align-items:baseline}
.foot dl{display:flex;flex-wrap:wrap;align-items:baseline;gap:6px 12px;margin:0}
.foot dt{font-size:15px;letter-spacing:.06em;color:var(--muted)}
.foot dd{margin:0}
.foot dd a{
  display:inline-flex;align-items:center;min-height:40px;padding:2px 2px;
  font-size:16px;text-decoration:none;color:#f0dcdc;
  border-bottom:1px solid transparent;
}
.foot dd a:hover{color:#fff;border-bottom-color:var(--pink)}
.copy{margin:14px 0 0;font-size:15px;color:var(--muted)}

/* ---------- 响应式 ---------- */
@media (max-width:1100px){
  .board{grid-template-columns:minmax(0,1fr) 260px}
}

@media (max-width:880px){
  .rail{
    position:sticky;inset:0 0 auto 0;width:100%;
    flex-direction:row;align-items:center;gap:10px;
    padding:9px 14px;
    border-right:0;border-bottom:1px solid var(--line);
  }
  .rail-top{flex:0 0 auto}
  .brand-name{display:none}
  .rail-nav{flex:1 1 auto;overflow-x:auto;overflow-y:hidden}
  .rail-list{display:flex;gap:6px;grid-template-columns:none}
  .rail-item > a{padding:8px 12px;white-space:nowrap;border:1px solid var(--line)}
  .rail-num{display:none}
  .rail-sub{display:none}
  main{margin-left:0}
  .hero{grid-template-columns:1fr;min-height:0;padding:36px 18px 40px;gap:26px}
  .hero-num{font-size:clamp(120px,34vw,220px);right:-2%;top:8%;transform:none;opacity:.75}
  .lede{max-width:none}
  .hero-fig{aspect-ratio:4/3}
  .board{grid-template-columns:1fr;padding:0 18px 48px;gap:26px}
  .board-side{position:static;order:2}
  .foot{margin-left:0;padding:22px 18px 34px}
  .foot-grid{gap:4px 22px}
}

@media (max-width:560px){
  body{font-size:16px}
  .hero h1{font-size:clamp(27px,8vw,36px)}
  .btn{flex:1 1 150px}
  .board-main > div{padding:32px 0}
  .board-main p,.board-main ul,.board-main ol{max-width:none}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
}

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