/* ==========================================================================
   Hualian (幻联科技) — Minimalist design
   ========================================================================== */

/* ---------- Fonts ---------- */
@font-face {
  font-family: "Untitled Sans";
  src: url("../assets/fonts/untitled-sans/untitled-sans-light.woff2") format("woff2");
  font-weight: 300;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Untitled Sans";
  src: url("../assets/fonts/untitled-sans/untitled-sans-regular.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Untitled Sans";
  src: url("../assets/fonts/untitled-sans/untitled-sans-medium.woff2") format("woff2");
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

/* ---------- Design Tokens ---------- */
:root {
  --ink: #000000;
  --ink-soft: #333333;
  --muted: #666666;
  --muted-light: #999999;
  --paper: #f8f8f8;
  --white: #ffffff;
  --footer-bg: #f2f2f2;
  --line: rgba(0, 0, 0, 0.12);
  --gradient-purple: linear-gradient(100deg, #6c5ce7 0%, #2d1b69 100%);
  --gradient-card-green: linear-gradient(180deg, rgba(38, 80, 48, 0.50) 0%, rgba(20, 56, 28, 0.82) 100%);
  --gradient-card-warm: linear-gradient(180deg, rgba(120, 60, 90, 0.45) 0%, rgba(90, 30, 70, 0.78) 100%);
  --radius-sm: 12px;
  --radius-md: 20px;
  --radius-lg: 28px;
  --radius-pill: 999px;
  --shadow-card: 0 8px 40px rgba(0, 0, 0, 0.10);
  --shadow-card-hover: 0 12px 48px rgba(0, 0, 0, 0.16);
  --transition-fast: 180ms ease;
  --transition-med: 320ms ease;
}

/* ---------- Page ---------- */
.hl-page {
  min-width: 320px;
  margin: 0;
  background: var(--white);
  color: var(--ink);
  font-family: "Untitled Sans", "PingFang SC", "Noto Sans CJK SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  font-size: 16px;
  line-height: 1.5;
  letter-spacing: 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ---------- Skip Link ---------- */
.skip-link {
  position: fixed;
  left: 16px;
  top: 16px;
  z-index: 100;
  translate: 0 -140%;
  border-radius: var(--radius-pill);
  background: var(--ink);
  color: var(--white);
  padding: 10px 18px;
  font-size: 14px;
  text-decoration: none;
}

.skip-link:focus {
  translate: 0;
}

/* ---------- Announcement Bar ---------- */
.announcement {
  position: fixed;
  inset: 0 0 auto;
  z-index: 40;
  min-height: 50px;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 18px;
  padding: 8px 32px;
  background: var(--gradient-purple);
  color: var(--white);
  font-size: clamp(14px, 1.2vw, 18px);
  font-weight: 400;
}

.announcement[hidden] {
  display: none;
}

.announcement a {
  justify-self: center;
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 255, 255, 0.4);
  transition: border-color var(--transition-fast);
}

.announcement a:hover {
  border-color: var(--white);
}

.close-button {
  width: 34px;
  height: 34px;
  border: 0;
  border-radius: 50%;
  background: transparent;
  color: currentColor;
  transition: background var(--transition-fast);
}

.close-button:hover {
  background: rgba(255, 255, 255, 0.15);
}

.close-button span,
.close-button span::after {
  display: block;
  width: 18px;
  height: 2px;
  margin: auto;
  background: currentColor;
  border-radius: var(--radius-pill);
}

.close-button span {
  rotate: 45deg;
}

.close-button span::after {
  content: "";
  rotate: 90deg;
}

/* ---------- Header ---------- */
.site-header {
  position: fixed;
  inset: 50px 0 auto;
  z-index: 35;
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  min-height: 78px;
  padding: 14px 32px;
  color: var(--white);
  transition: color var(--transition-fast), background var(--transition-fast);
}

.announcement[hidden] + .site-header {
  inset-block-start: 0;
}

.site-header.is-scrolled {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.95);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 var(--line);
}

.brand {
  display: inline-grid;
  width: 46px;
  height: 46px;
  place-items: center;
  text-decoration: none;
}

.brand img {
  width: 42px;
  height: 42px;
  object-fit: cover;
  filter: saturate(0) brightness(0) invert(1);
  transition: filter var(--transition-fast);
}

.site-header.is-scrolled .brand img {
  filter: none;
}

.main-nav {
  justify-self: end;
  display: flex;
  align-items: center;
  gap: clamp(22px, 2.7vw, 46px);
  font-size: clamp(16px, 1.3vw, 20px);
}

.main-nav a,
.pill-button,
.footer-join,
.action-card,
.site-footer a {
  color: inherit;
  text-decoration: none;
}

.nav-pill {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  padding: 0 28px;
  border: 1.5px solid currentColor;
  border-radius: var(--radius-pill);
  font-size: inherit;
  transition: background var(--transition-fast), color var(--transition-fast);
}

.nav-pill:hover {
  background: currentColor;
  color: var(--white);
}

.site-header:not(.is-scrolled) .nav-pill:hover {
  background: var(--white);
  color: var(--ink);
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 100svh;
  overflow: hidden;
  display: grid;
  align-items: end;
  padding: 150px 6.5vw 8vh;
  color: var(--white);
  isolation: isolate;
}

.hero-media,
.hero-overlay {
  position: absolute;
  inset: 0;
}

.hero-media {
  width: 100%;
  height: 100%;
  max-width: none;
  object-fit: cover;
  object-position: center;
  z-index: -2;
}

.hero-overlay {
  z-index: -1;
  background:
    linear-gradient(180deg, rgba(0, 0, 0, 0.08) 0%, rgba(0, 0, 0, 0.12) 34%, rgba(0, 0, 0, 0.78) 100%),
    linear-gradient(90deg, rgba(0, 0, 0, 0.50), rgba(0, 0, 0, 0.06) 60%);
}

.hero-copy {
  display: grid;
  gap: 36px;
  width: min(780px, 100%);
}

.hero h1 {
  margin: 0;
  font-size: clamp(56px, 7vw, 96px);
  line-height: 1.02;
  font-weight: 500;
  letter-spacing: -0.02em;
}

.pill-button {
  display: inline-flex;
  width: fit-content;
  min-height: 64px;
  align-items: center;
  justify-content: center;
  gap: 10px;
  border-radius: var(--radius-pill);
  padding: 0 34px;
  background: var(--white);
  color: var(--ink);
  font-size: clamp(16px, 1.3vw, 20px);
  font-weight: 400;
  transition: background var(--transition-fast), transform var(--transition-fast);
}

.pill-button:hover {
  background: #e8e8e8;
  transform: translateY(-1px);
}

/* ---------- Mission Statement ---------- */
.statement-section {
  scroll-margin-top: 138px;
  min-height: 88svh;
  display: grid;
  grid-template-columns: minmax(280px, 0.9fr) minmax(320px, 1fr);
  gap: clamp(56px, 10vw, 180px);
  align-items: center;
  padding: clamp(100px, 12vw, 180px) 12vw;
  background: var(--white);
}

.statement-section h2 {
  margin: 0;
  max-width: 620px;
  font-size: clamp(36px, 4.5vw, 72px);
  line-height: 1.06;
  font-weight: 500;
  letter-spacing: -0.01em;
}

.statement-copy {
  display: grid;
  gap: 24px;
  color: var(--ink-soft);
  font-size: clamp(16px, 1.2vw, 18px);
  line-height: 1.6;
  font-weight: 400;
}

.statement-copy p,
.showcase-copy p,
.site-footer p {
  margin: 0;
}

/* ---------- Products / Showcase ---------- */
.showcase-section,
.action-section {
  position: relative;
  overflow: hidden;
}

.showcase-section {
  scroll-margin-top: 138px;
  min-height: 100svh;
  padding: clamp(100px, 10vw, 180px) 7vw clamp(80px, 10vw, 160px);
  background: var(--paper);
}

.showcase-section h2,
.action-section h2 {
  margin: 0;
  text-align: center;
  font-size: clamp(36px, 4vw, 72px);
  line-height: 1.04;
  font-weight: 500;
  letter-spacing: -0.01em;
}

.showcase-frame {
  position: relative;
  display: grid;
  grid-template-columns: minmax(18px, 34px) minmax(0, 1fr);
  gap: clamp(40px, 5vw, 86px);
  width: min(1180px, 100%);
  margin: clamp(60px, 7vw, 110px) auto 0;
}

.showcase-rail {
  align-self: stretch;
  min-height: 560px;
  border-radius: var(--radius-pill);
  background: linear-gradient(180deg, #1a1a1a, #4a4a4a 50%, #1a1a1a);
}

.showcase-slide {
  display: grid;
  gap: 32px;
}

.showcase-slide[hidden] {
  display: none;
}

.showcase-slide img {
  width: 100%;
  height: min(46vw, 640px);
  min-height: 420px;
  object-fit: cover;
  object-position: center;
  border-radius: var(--radius-lg);
  background: var(--white);
  box-shadow: var(--shadow-card);
}

.showcase-copy {
  display: grid;
  gap: 16px;
}

.showcase-copy h3 {
  margin: 0;
  font-size: clamp(24px, 2.4vw, 44px);
  line-height: 1.1;
  font-weight: 500;
}

.showcase-copy p {
  max-width: 960px;
  font-size: clamp(16px, 1.3vw, 20px);
  line-height: 1.55;
  color: var(--ink-soft);
}

.showcase-copy dl {
  display: flex;
  flex-wrap: wrap;
  gap: 22px;
  margin: 8px 0 0;
}

.showcase-copy dl div {
  display: flex;
  gap: 8px;
  align-items: baseline;
}

.showcase-copy dt {
  color: var(--muted-light);
  font-size: 14px;
  font-weight: 400;
}

.showcase-copy dd {
  margin: 0;
  font-size: 16px;
  font-weight: 500;
}

.showcase-controls {
  width: min(1180px, 100%);
  margin: 46px auto 0;
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 16px;
}

.showcase-status {
  margin-right: auto;
  color: var(--muted);
  font-size: 16px;
}

.circle-button {
  width: 64px;
  height: 64px;
  border: 1.5px solid var(--ink);
  border-radius: 50%;
  background: transparent;
  color: var(--ink);
  font-size: 24px;
  transition: background var(--transition-fast), color var(--transition-fast);
}

.circle-button:hover {
  background: var(--ink);
  color: var(--white);
}

/* ---------- Discover More / Action Cards ---------- */
.action-section {
  scroll-margin-top: 138px;
  min-height: 100svh;
  padding: clamp(80px, 9vw, 150px) 7vw clamp(120px, 14vw, 220px);
  background: var(--white);
}

.action-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(24px, 3vw, 48px);
  width: min(1140px, 100%);
  margin: clamp(60px, 7vw, 110px) auto 0;
}

.action-card {
  position: relative;
  min-height: 480px;
  overflow: hidden;
  display: grid;
  align-content: space-between;
  padding: clamp(36px, 4vw, 58px);
  border-radius: var(--radius-lg);
  color: var(--white);
  isolation: isolate;
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--transition-fast), transform var(--transition-fast);
}

.action-card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-2px);
}

.action-card::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: var(--gradient-card-green);
  transition: opacity var(--transition-fast);
}

.action-card-warm::after {
  background: var(--gradient-card-warm);
}

.action-card img {
  position: absolute;
  inset: 0;
  z-index: -2;
  width: 100%;
  height: 100%;
  max-width: none;
  object-fit: cover;
}

.action-card span {
  font-size: clamp(36px, 4vw, 64px);
  line-height: 1.04;
  font-weight: 500;
}

.action-card b {
  width: 100%;
  max-width: 380px;
  justify-self: start;
  display: inline-flex;
  justify-content: center;
  align-items: center;
  gap: 10px;
  min-height: 64px;
  border: 1.5px solid currentColor;
  border-radius: var(--radius-pill);
  font-size: clamp(16px, 1.3vw, 20px);
  font-weight: 400;
  transition: background var(--transition-fast), color var(--transition-fast);
}

.action-card b:hover {
  background: var(--white);
  color: var(--ink);
}

/* ---------- Footer ---------- */
.site-footer {
  position: relative;
  min-height: 100svh;
  display: grid;
  align-content: space-between;
  gap: 80px;
  padding: 90px 5vw 54px;
  background: var(--footer-bg);
  color: var(--ink);
}

.footer-join {
  justify-self: end;
  display: inline-flex;
  min-height: 56px;
  align-items: center;
  justify-content: center;
  border: 1.5px solid currentColor;
  border-radius: var(--radius-pill);
  padding: 0 30px;
  font-size: clamp(17px, 1.5vw, 24px);
  font-weight: 400;
  transition: background var(--transition-fast), color var(--transition-fast);
}

.footer-join:hover {
  background: var(--ink);
  color: var(--white);
}

.footer-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(44px, 7vw, 120px);
  width: min(1280px, 100%);
  margin-top: 12vh;
}

.footer-columns nav {
  display: grid;
  align-content: start;
  gap: 14px;
  font-size: clamp(16px, 1.3vw, 22px);
}

.footer-columns p {
  color: var(--muted);
  font-size: clamp(14px, 1vw, 16px);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 4px;
}

.footer-columns span {
  max-width: 460px;
  line-height: 1.55;
  color: var(--ink-soft);
  font-size: clamp(14px, 1vw, 16px);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 32px;
}

.footer-bottom img {
  width: 58px;
  height: 50px;
  object-fit: cover;
}

.footer-bottom p {
  font-size: clamp(14px, 1.1vw, 18px);
  color: var(--muted);
}

/* ---------- Responsive: Tablet (<=980px) ---------- */
@media (max-width: 980px) {
  .main-nav a:not(.nav-pill) {
    display: none;
  }

  .statement-section,
  .action-grid,
  .footer-columns {
    grid-template-columns: 1fr;
  }

  .statement-section {
    padding-inline: 8vw;
  }

  .showcase-frame {
    grid-template-columns: 1fr;
  }

  .showcase-rail {
    display: none;
  }

  .showcase-section {
    min-height: auto;
  }

  .footer-columns span {
    max-width: none;
  }
}

/* ---------- Responsive: Mobile (<=620px) ---------- */
@media (max-width: 620px) {
  .announcement {
    padding-inline: 14px;
    font-size: 13px;
  }

  .announcement a {
    justify-self: start;
  }

  .site-header {
    min-height: 68px;
    padding-inline: 20px;
  }

  .brand {
    width: 38px;
    height: 38px;
  }

  .brand img {
    width: 36px;
    height: 36px;
  }

  .nav-pill {
    min-height: 44px;
    padding-inline: 18px;
    font-size: 14px;
  }

  .hero {
    min-height: 96svh;
    padding: 124px 24px 56px;
  }

  .hero-media {
    object-position: 55% center;
  }

  .hero h1 {
    font-size: clamp(44px, 13vw, 64px);
  }

  .pill-button {
    width: 100%;
    min-height: 60px;
  }

  .statement-section,
  .showcase-section,
  .action-section,
  .site-footer {
    padding-inline: 24px;
  }

  .statement-section {
    min-height: auto;
    padding-block: 80px;
  }

  .statement-section h2,
  .showcase-section h2,
  .action-section h2 {
    font-size: clamp(32px, 10vw, 52px);
  }

  .statement-copy {
    font-size: 16px;
  }

  .showcase-slide img {
    min-height: 280px;
    height: 70vw;
    border-radius: var(--radius-md);
  }

  .showcase-controls {
    align-items: center;
  }

  .circle-button {
    width: 52px;
    height: 52px;
    font-size: 20px;
  }

  .action-card {
    min-height: 340px;
    border-radius: var(--radius-md);
  }

  .action-card span {
    font-size: clamp(28px, 7vw, 44px);
  }

  .action-card b {
    max-width: none;
  }

  .footer-join {
    justify-self: start;
  }

  .footer-bottom {
    display: grid;
  }
}

/* ---------- Reduced Motion ---------- */
@media (prefers-reduced-motion: no-preference) {
  .showcase-slide.is-active {
    animation: hl-slide-in 400ms cubic-bezier(0.22, 1, 0.36, 1) both;
  }

  @keyframes hl-slide-in {
    from {
      opacity: 0;
      translate: 0 16px;
    }

    to {
      opacity: 1;
      translate: 0;
    }
  }

  .hero-copy {
    animation: hl-hero-fade 800ms cubic-bezier(0.22, 1, 0.36, 1) 200ms both;
  }

  @keyframes hl-hero-fade {
    from {
      opacity: 0;
      translate: 0 24px;
    }

    to {
      opacity: 1;
      translate: 0;
    }
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}