@import url('https://fonts.googleapis.com/css2?family=Bebas+Neue&family=Source+Sans+3:wght@300;400;500;600;700&display=swap');

:root {
  --ink: #0d0d0d;
  --ink-2: #131019;
  --pur: #8000ff;
  --mag: #ff00ff;
  --cyan: #2ce8ff;
  --txt: #e9e3f6;
  --dim: #a294c0;
  --line: rgba(128, 0, 255, .35);
  --line-2: rgba(255, 0, 255, .38);
  --hud: 30px;
  --barh: 58px;
  --anch: 46px;
  --r: 10px;
  --sans: "Source Sans 3", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, "Cascadia Mono", monospace;
  --head: "Bebas Neue", "Source Sans 3", "PingFang SC", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--ink);
  color: var(--txt);
  font-family: var(--sans);
  font-size: 1.0625rem;
  line-height: 1.68;
  font-weight: 400;
  overflow-x: hidden;
  background-image:
    radial-gradient(900px 520px at 88% -8%, rgba(255, 0, 255, .17), transparent 62%),
    radial-gradient(760px 520px at 4% 4%, rgba(128, 0, 255, .2), transparent 60%);
  background-repeat: no-repeat;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 400;
  pointer-events: none;
  opacity: .5;
  background: repeating-linear-gradient(180deg, rgba(255, 255, 255, .05) 0 1px, transparent 1px 3px);
  mix-blend-mode: screen;
}

img { max-width: 100%; display: block; }
a { color: var(--cyan); text-decoration: none; }
a:hover, a:focus-visible { color: #fff; }

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

[id] { scroll-margin-top: calc(var(--hud) + var(--barh) + var(--anch) + 16px); }

/* ---------- 顶部警戒条 ---------- */
.hud {
  position: sticky;
  top: 0;
  z-index: 40;
  height: var(--hud);
  display: flex;
  align-items: center;
  gap: .6rem;
  padding: 0 clamp(12px, 3vw, 28px);
  font-family: var(--mono);
  font-size: .74rem;
  letter-spacing: .22em;
  color: var(--dim);
  background: #08070a;
  border-bottom: 1px solid var(--line);
  text-transform: uppercase;
}

.hud .dot {
  width: 7px;
  height: 7px;
  background: var(--mag);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--mag);
  animation: pulse 2.4s ease-in-out infinite;
}

.hud b {
  color: var(--txt);
  font-weight: 500;
  letter-spacing: .18em;
}

.hud-line {
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--line), transparent);
}

/* ---------- 主条 ---------- */
.bar {
  position: sticky;
  top: var(--hud);
  z-index: 39;
  height: var(--barh);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0 clamp(12px, 3vw, 28px);
  background: rgba(13, 13, 13, .93);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  min-height: 44px;
  color: var(--txt);
  font-family: var(--head);
  font-size: 1.5rem;
  letter-spacing: .12em;
  text-shadow: 0 0 14px rgba(255, 0, 255, .55);
}

.mark {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border: 1px solid var(--mag);
  border-radius: 6px;
  font-size: 1rem;
  color: var(--mag);
  box-shadow: inset 0 0 12px rgba(255, 0, 255, .25);
}

.burger {
  min-height: 44px;
  padding: 0 1.05rem;
  font-family: var(--mono);
  font-size: .85rem;
  letter-spacing: .18em;
  color: var(--txt);
  background: transparent;
  border: 1px solid var(--line-2);
  border-radius: var(--r);
  cursor: pointer;
}

.burger:hover { color: var(--mag); box-shadow: 0 0 14px rgba(255, 0, 255, .3); }

/* ---------- 锚点条 ---------- */
.anchors {
  position: sticky;
  top: calc(var(--hud) + var(--barh));
  z-index: 38;
  background: #0a090d;
  border-bottom: 1px solid var(--line);
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scrollbar-width: none;
}

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

.anchor-list {
  display: flex;
  align-items: stretch;
  gap: 0;
  margin: 0;
  padding: 0 clamp(8px, 2vw, 20px);
  list-style: none;
  min-height: var(--anch);
}

.anchor-list li {
  display: flex;
  flex: 0 0 auto;
  opacity: 0;
  transform: translateY(-6px);
  animation: drop .45s cubic-bezier(.2, .8, .3, 1) forwards;
  animation-delay: calc(var(--i, 0) * 55ms + 120ms);
}

.anchor-list a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: .5rem .78rem;
  font-family: var(--mono);
  font-size: .8rem;
  letter-spacing: .08em;
  color: var(--dim);
  border-bottom: 2px solid transparent;
  white-space: nowrap;
}

.anchor-list a:hover,
.anchor-list a[aria-current="true"] {
  color: #fff;
  border-bottom-color: var(--mag);
  text-shadow: 0 0 12px rgba(255, 0, 255, .7);
}

/* ---------- 全屏遮罩菜单 ---------- */
.veil {
  position: fixed;
  inset: 0;
  z-index: 300;
  display: flex;
  flex-direction: column;
  padding: 1.1rem clamp(16px, 5vw, 48px) 2rem;
  background: rgba(8, 7, 11, .97);
  backdrop-filter: blur(6px);
  overflow-y: auto;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: opacity .28s ease, transform .28s ease, visibility .28s;
}

body.menu-open .veil {
  opacity: 1;
  visibility: visible;
  transform: none;
}

body.menu-open { overflow: hidden; }

.veil-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--line-2);
}

.veil-t {
  font-family: var(--head);
  font-size: 1.6rem;
  letter-spacing: .14em;
  color: var(--mag);
  text-shadow: 0 0 16px rgba(255, 0, 255, .6);
}

.veil-close {
  min-height: 44px;
  padding: 0 1.1rem;
  font-family: var(--mono);
  font-size: .85rem;
  letter-spacing: .2em;
  color: var(--txt);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: var(--r);
  cursor: pointer;
}

.veil-nav { margin-top: .6rem; }

.veil-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: .3rem;
}

.veil-list li {
  opacity: 0;
  transform: translateX(-14px);
  animation: slide .4s ease forwards;
  animation-delay: calc(var(--i, 0) * 45ms);
}

.veil-list a {
  display: flex;
  align-items: center;
  min-height: 52px;
  padding: .5rem .2rem;
  font-size: 1.15rem;
  color: var(--txt);
  border-bottom: 1px dashed rgba(128, 0, 255, .25);
}

.veil-list a:hover { color: var(--mag); text-shadow: 0 0 14px rgba(255, 0, 255, .6); }

/* ---------- 首屏 ---------- */
.hero {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  min-height: 100svh;
  padding: clamp(18px, 3vw, 40px) clamp(14px, 5vw, 56px) clamp(16px, 3vw, 36px);
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}

.hero::after {
  content: "";
  position: absolute;
  left: clamp(14px, 5vw, 56px);
  top: 0;
  width: 1px;
  height: 46px;
  background: linear-gradient(180deg, var(--mag), transparent);
}

.hero-txt { max-width: 40ch; }

.hero h1 {
  margin: 0;
  font-family: var(--head);
  font-weight: 400;
  font-size: clamp(2.5rem, 8.4vw, 5.6rem);
  line-height: 1.05;
  letter-spacing: .03em;
  color: #fff;
  text-shadow: 0 0 18px rgba(255, 0, 255, .55), 3px 3px 0 rgba(128, 0, 255, .5);
  animation: glitch 6s steps(1) infinite;
}

.badge {
  display: inline-block;
  margin: .85rem 0 0;
  padding: .3rem .75rem;
  font-family: var(--mono);
  font-size: .74rem;
  letter-spacing: .26em;
  color: var(--mag);
  border: 1px solid var(--line-2);
  border-radius: 999px;
  background: rgba(255, 0, 255, .07);
}

.hero-desc {
  margin: .9rem 0 0;
  font-size: 1rem;
  color: var(--dim);
  max-width: 46ch;
}

.hero-media {
  position: relative;
  flex: 1 1 auto;
  margin-top: clamp(16px, 3vw, 32px);
  min-height: 200px;
  border: 1px solid var(--line-2);
  border-radius: var(--r);
  overflow: hidden;
  background:
    linear-gradient(180deg, rgba(128, 0, 255, .16), transparent 70%),
    repeating-linear-gradient(90deg, rgba(128, 0, 255, .16) 0 1px, transparent 1px 38px),
    repeating-linear-gradient(0deg, rgba(128, 0, 255, .16) 0 1px, transparent 1px 38px),
    #0a090f;
}

.hero-media .hero-img {
  width: 100%;
  height: 100%;
  min-height: 200px;
  object-fit: cover;
  filter: saturate(1.1) contrast(1.06);
  will-change: transform;
}

/* ---------- 主体 ---------- */
.shell {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: clamp(18px, 3vw, 44px);
  max-width: 1180px;
  margin: 0 auto;
  padding: clamp(26px, 4vw, 56px) clamp(14px, 5vw, 56px) clamp(40px, 6vw, 80px);
  align-items: start;
}

.side {
  position: sticky;
  top: calc(var(--hud) + var(--barh) + var(--anch) + 18px);
  padding: 1rem 1rem 1.2rem;
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: rgba(19, 16, 25, .7);
}

.side h2,
.fcol h2,
.cta h2 {
  margin: 0 0 .7rem;
  font-family: var(--mono);
  font-size: .74rem;
  font-weight: 500;
  letter-spacing: .24em;
  color: var(--mag);
}

.side h2 span::before,
.fcol h2 span::before,
.cta h2 span::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  margin-right: .5rem;
  vertical-align: middle;
  background: var(--pur);
  box-shadow: 0 0 8px var(--pur);
}

.side-list,
.foot-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: .18rem;
}

.side-list a,
.foot-list a {
  display: flex;
  align-items: center;
  min-height: 40px;
  padding: .2rem .1rem;
  font-size: .92rem;
  color: var(--dim);
  border-bottom: 1px solid rgba(128, 0, 255, .16);
}

.side-list a:hover,
.foot-list a:hover { color: #fff; padding-left: .3rem; transition: padding .18s ease; }

.doc { min-width: 0; }

.doc-in {
  font-size: 1.0625rem;
  color: var(--txt);
}

.doc-in > section {
  padding-block: clamp(20px, 3vw, 34px);
  border-top: 1px dashed rgba(128, 0, 255, .3);
}

.doc-in > section:first-child { border-top: 0; padding-top: 0; }

.doc-in h2 {
  position: relative;
  margin: 0 0 .8rem;
  padding-left: .75rem;
  font-family: var(--head);
  font-weight: 400;
  font-size: clamp(1.55rem, 3.6vw, 2.2rem);
  line-height: 1.2;
  letter-spacing: .04em;
  color: #fff;
  text-shadow: 0 0 14px rgba(128, 0, 255, .6);
}

.doc-in h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: .22em;
  bottom: .22em;
  width: 3px;
  background: linear-gradient(180deg, var(--mag), var(--pur));
  box-shadow: 0 0 10px var(--mag);
}

.doc-in h3 {
  margin: 1.4rem 0 .5rem;
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--cyan);
  letter-spacing: .02em;
}

.doc-in h2 span,
.doc-in h3 span { display: inline; }

.doc-in p { margin: 0 0 1rem; }
.doc-in p:last-child { margin-bottom: 0; }

.doc-in ul,
.doc-in ol {
  margin: 0 0 1rem;
  padding-left: 1.25rem;
}

.doc-in li { margin-bottom: .4rem; }

.doc-in strong { color: #fff; font-weight: 600; }

.doc-in blockquote {
  margin: 1rem 0;
  padding: .7rem 1rem;
  border-left: 2px solid var(--mag);
  background: rgba(255, 0, 255, .06);
  border-radius: 0 var(--r) var(--r) 0;
  color: var(--dim);
}

.doc-in img {
  width: 100%;
  height: auto;
  margin: 1rem 0;
  border: 1px solid var(--line);
  border-radius: var(--r);
}

.doc-in time { font-family: var(--mono); font-size: .82rem; color: var(--dim); letter-spacing: .06em; }

/* ---------- 页脚 ---------- */
.foot {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: clamp(16px, 3vw, 34px);
  max-width: 1180px;
  margin: 0 auto;
  padding: clamp(28px, 4vw, 52px) clamp(14px, 5vw, 56px) 1.4rem;
  border-top: 1px solid var(--line-2);
}

.cta {
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: clamp(16px, 3vw, 26px);
  border: 1px solid var(--line-2);
  border-radius: var(--r);
  background: linear-gradient(120deg, rgba(128, 0, 255, .18), rgba(255, 0, 255, .08));
}

.cta h2 { margin: 0; }

.cta-a {
  display: inline-flex;
  align-items: center;
  min-height: 46px;
  padding: 0 1.3rem;
  font-family: var(--mono);
  font-size: .92rem;
  letter-spacing: .12em;
  color: #0d0d0d;
  background: var(--mag);
  border-radius: var(--r);
  box-shadow: 0 0 20px rgba(255, 0, 255, .45);
}

.cta-a:hover { color: #0d0d0d; background: #fff; }

.fmark {
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  margin: 0;
  font-family: var(--head);
  font-size: 1.3rem;
  letter-spacing: .12em;
  color: var(--txt);
}

.foot-list a { font-size: .86rem; }

.ftop a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  font-family: var(--mono);
  font-size: .85rem;
  letter-spacing: .1em;
  color: var(--dim);
}

.base {
  grid-column: 1 / -1;
  padding-top: 1rem;
  border-top: 1px dashed rgba(128, 0, 255, .28);
  text-align: center;
}

.base p {
  margin: 0;
  font-family: var(--mono);
  font-size: .74rem;
  letter-spacing: .18em;
  color: rgba(162, 148, 192, .8);
}

/* ---------- 动效 ---------- */
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: .25; }
}

@keyframes drop {
  to { opacity: 1; transform: none; }
}

@keyframes slide {
  to { opacity: 1; transform: none; }
}

@keyframes glitch {
  0%, 92%, 100% { transform: none; }
  93% { transform: skewX(-2.2deg) translateX(-2px); }
  95% { transform: skewX(2deg) translateX(2px); }
  97% { transform: skewX(-1deg); }
}

/* ---------- 中屏 ---------- */
@media (max-width: 900px) {
  .shell { grid-template-columns: minmax(0, 1fr); }
  .side { position: static; order: -1; }
  .side-list { grid-template-columns: 1fr 1fr; gap: 0 .8rem; }
  .foot { grid-template-columns: 1fr 1fr; }
  .fcol-brand { grid-column: 1 / -1; }
}

/* ---------- 小屏 ---------- */
@media (max-width: 560px) {
  :root { --hud: 26px; --barh: 52px; --anch: 44px; }
  body { font-size: 1rem; }
  .hud { font-size: .66rem; letter-spacing: .14em; }
  .brand { font-size: 1.3rem; }
  .hero { padding-inline: 14px; }
  .hero h1 { font-size: clamp(2.2rem, 11vw, 3.1rem); }
  .hero-desc { font-size: .96rem; }
  .shell { padding-inline: 14px; gap: 22px; }
  .foot { grid-template-columns: 1fr; padding-inline: 14px; }
  .base { text-align: center; }
  .veil-list a { font-size: 1.05rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .anchor-list li, .veil-list li { opacity: 1; transform: none; }
}

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