:root {
  --red: #ff0000;
  --purple: #8b00ff;
  --ink: #261717;
  --txt: #f6eef1;
  --dim: rgba(246, 238, 241, 0.72);
  --line: rgba(255, 255, 255, 0.2);
  --glass: rgba(255, 255, 255, 0.09);
  --r: 10px;
}

* {
  box-sizing: border-box;
}

html {
  background: #160c15;
  scroll-behavior: smooth;
  overflow-x: hidden;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  overflow-x: hidden;
  color: var(--txt);
  font-family: 'Noto Sans Thai', system-ui, -apple-system, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  font-size: 17px;
  line-height: 1.72;
  -webkit-font-smoothing: antialiased;
}

body::before {
  content: "";
  position: fixed;
  inset: -12% -12% -12% -12%;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(48vw 48vw at 10% 6%, rgba(255, 0, 0, 0.42), transparent 62%),
    radial-gradient(52vw 52vw at 92% 14%, rgba(139, 0, 255, 0.48), transparent 66%),
    radial-gradient(72vw 62vw at 46% 104%, rgba(139, 0, 255, 0.3), transparent 70%),
    linear-gradient(165deg, #261717 0%, #180d18 52%, #120a14 100%);
  animation: breathe 20s ease-in-out infinite alternate;
}

@keyframes breathe {
  from { transform: scale(1); }
  to { transform: scale(1.08) translateY(-1.5%); }
}

img {
  max-width: 100%;
}

a {
  color: #ffc9c9;
}

small {
  display: block;
  margin-bottom: 2px;
  font-size: 16px;
  font-weight: 500;
  letter-spacing: 0.18em;
  color: rgba(255, 255, 255, 0.62);
}

/* ---------- 顶部玻璃条 ---------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 60;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 9px clamp(14px, 3vw, 34px);
  background: rgba(38, 23, 23, 0.55);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.brand {
  flex: 0 0 auto;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-decoration: none;
  color: #fff;
  text-shadow: 0 1px 12px rgba(255, 0, 0, 0.5);
}

.topbar nav {
  flex: 1 1 auto;
  min-width: 0;
  overflow-x: auto;
  scrollbar-width: none;
}

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

.mainnav {
  display: flex;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.mainnav li {
  flex: 0 0 auto;
}

.mainnav a {
  display: flex;
  align-items: center;
  min-height: 42px;
  padding: 0 11px;
  border-radius: var(--r);
  font-size: 16px;
  white-space: nowrap;
  text-decoration: none;
  color: var(--dim);
  transition: background 0.2s ease, color 0.2s ease;
}

.mainnav a:hover,
.mainnav a.on {
  color: #fff;
  background: rgba(255, 255, 255, 0.14);
}

.cta {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  min-height: 42px;
  padding: 0 16px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: #fff;
  font-size: 16px;
  white-space: nowrap;
  text-decoration: none;
}

.cta:hover {
  background: rgba(255, 255, 255, 0.22);
}

/* ---------- 主网格 ---------- */
main {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 288px;
  gap: 26px 34px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 clamp(16px, 4vw, 32px) 72px;
}

/* ---------- 首屏 ---------- */
.hero {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  align-items: center;
  gap: clamp(20px, 4vw, 56px);
  min-height: 100vh;
  padding: clamp(48px, 10vh, 104px) 0 clamp(36px, 7vh, 72px);
  scroll-margin-top: 96px;
}

.hero-text {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.hero h1 {
  margin: 0 0 16px;
  font-size: clamp(30px, 5.4vw, 62px);
  font-weight: 700;
  line-height: 1.16;
  letter-spacing: -0.01em;
  background: linear-gradient(118deg, #ffffff 18%, #ffd3d3 54%, #dcb6ff 92%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-wrap: balance;
}

.lede {
  max-width: 34em;
  margin: 0 0 26px;
  font-size: 17px;
  color: var(--dim);
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  min-height: 48px;
  padding: 0 28px;
  border-radius: 999px;
  font-weight: 500;
  font-size: 17px;
  text-decoration: none;
  color: #fff;
  background: linear-gradient(100deg, var(--red), var(--purple));
  box-shadow: 0 14px 34px rgba(139, 0, 255, 0.35);
}

.hero-cta:hover {
  filter: brightness(1.1);
}

.hero-figure {
  position: relative;
  width: 100%;
  height: clamp(280px, 58vh, 540px);
  margin: 0;
  overflow: hidden;
  border-radius: 18px;
  border: 1px solid rgba(255, 255, 255, 0.28);
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 30px 70px rgba(0, 0, 0, 0.45), inset 0 1px 0 rgba(255, 255, 255, 0.35);
  will-change: transform;
}

.hero-img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.orb {
  width: 100%;
  height: 100%;
  background:
    radial-gradient(circle at 32% 28%, rgba(255, 130, 130, 0.95), transparent 58%),
    radial-gradient(circle at 70% 74%, rgba(139, 0, 255, 0.9), transparent 62%),
    #3a1230;
}

/* ---------- 正文区块 ---------- */
main > div:not(.hero) {
  grid-column: 1;
  padding: clamp(20px, 3vw, 32px);
  border-radius: var(--r);
  background: var(--glass);
  backdrop-filter: blur(15px);
  -webkit-backdrop-filter: blur(15px);
  box-shadow: 0 16px 38px rgba(0, 0, 0, 0.3), inset 0 1px 0 rgba(255, 255, 255, 0.13);
  scroll-margin-top: 96px;
  transition: transform 0.35s ease, box-shadow 0.35s ease;
}

main > div:not(.hero):hover {
  transform: translateY(-3px);
  box-shadow: 0 22px 46px rgba(0, 0, 0, 0.36), inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

main h2 {
  position: relative;
  margin: 0.1em 0 0.7em;
  padding-left: 14px;
  font-size: clamp(22px, 2.6vw, 30px);
  line-height: 1.38;
  letter-spacing: 0.005em;
}

main h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.22em;
  bottom: 0.22em;
  width: 4px;
  border-radius: 3px;
  background: linear-gradient(180deg, var(--red), var(--purple));
}

main h3 {
  margin: 1.1em 0 0.4em;
  font-size: 19px;
  line-height: 1.45;
}

main p,
main li {
  max-width: 72ch;
}

main figure {
  margin: 0 0 1em;
}

main figure img {
  height: auto;
  border-radius: 8px;
}

main blockquote {
  margin: 1em 0;
  padding: 2px 0 2px 16px;
  border-left: 3px solid rgba(255, 0, 0, 0.55);
  color: var(--dim);
}

/* ---------- 右侧栏 ---------- */
.side {
  grid-column: 2;
  grid-row: 2 / span 99;
  align-self: start;
  position: sticky;
  top: 88px;
  padding: 16px 14px 12px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.34), inset 0 1px 0 rgba(255, 255, 255, 0.28);
}

.side h2 {
  margin: 0.1em 0 0.6em;
  padding-left: 12px;
  font-size: 19px;
}

.sidenav {
  display: grid;
  gap: 2px;
  margin: 0 0 10px;
  padding: 0;
  list-style: none;
}

.sidenav a {
  display: flex;
  align-items: center;
  min-height: 40px;
  padding: 0 10px;
  border-radius: 8px;
  font-size: 16px;
  text-decoration: none;
  color: var(--dim);
  transition: background 0.2s ease, color 0.2s ease;
}

.sidenav a:hover,
.sidenav a.on {
  color: #fff;
  background: rgba(255, 255, 255, 0.16);
}

.totop {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  margin-top: 6px;
  padding-top: 8px;
  border-top: 1px solid var(--line);
  font-size: 16px;
  text-decoration: none;
  color: #fff;
}

/* ---------- 页脚 ---------- */
footer {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr;
  gap: 30px clamp(20px, 4vw, 52px);
  padding: clamp(34px, 6vw, 62px) clamp(18px, 5vw, 56px) 22px;
  border-top: 1px solid var(--line);
  background: rgba(20, 11, 19, 0.55);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

footer div {
  min-width: 0;
}

.fmark {
  display: inline-block;
  font-size: clamp(28px, 5vw, 54px);
  font-weight: 700;
  line-height: 1.1;
  text-decoration: none;
  background: linear-gradient(100deg, #ffffff, var(--red) 56%, var(--purple));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

footer h3 {
  margin: 0.1em 0 0.6em;
  font-size: 18px;
  line-height: 1.4;
}

footer ul {
  display: grid;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
}

footer li a {
  display: flex;
  align-items: center;
  min-height: 40px;
  font-size: 16px;
  text-decoration: none;
  color: var(--dim);
}

footer li a:hover {
  color: #fff;
}

.f-about .link {
  display: inline-flex;
  align-items: center;
  min-height: 42px;
  padding: 0 18px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.13);
  color: #fff;
  font-size: 16px;
  text-decoration: none;
}

.f-legal {
  grid-column: 1 / -1;
  margin-top: 8px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  text-align: center;
}

.f-legal p {
  margin: 0;
  font-size: 16px;
  color: rgba(255, 255, 255, 0.62);
}

/* ---------- 断点 ---------- */
@media (max-width: 1000px) {
  main {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero {
    grid-template-columns: 1fr;
    padding-top: 40px;
    min-height: auto;
  }

  .hero-figure {
    order: 2;
    height: clamp(230px, 42vh, 360px);
  }

  .side {
    grid-column: 1;
    grid-row: auto;
    position: static;
  }

  footer {
    grid-template-columns: 1fr 1fr;
  }

  .f-brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 560px) {
  body {
    font-size: 16px;
  }

  .brand {
    font-size: 16px;
  }

  footer {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  body::before {
    animation: none;
  }

  main > div:not(.hero) {
    transition: none;
  }
}

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