/* ============ Reset & Variables ============ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --c-bg: #0A0E17;
  --c-panel: #111827;
  --c-white: #F8FAFC;
  --c-gray: #94A3B8;
  --c-accent: #39FF88;
  --c-orange: #FF6B35;
  --c-border: rgba(255,255,255,0.08);
  --c-grid: #1E293B;
  --c-bg-deep: #0F172A;
  --font-headline: "DIN Condensed", Impact, "Arial Narrow", sans-serif;
  --font-body: Inter, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  --font-mono: "JetBrains Mono", Consolas, monospace;
  --container-w: 1280px;
  --header-h: 64px;
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --transition: 0.3s var(--ease);
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  color: var(--c-white);
  background-color: var(--c-bg);
  background-image:
    linear-gradient(rgba(57,255,136,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(57,255,136,0.025) 1px, transparent 1px),
    radial-gradient(ellipse at 15% -10%, rgba(57,255,136,0.07) 0%, transparent 55%),
    radial-gradient(ellipse at 95% 110%, rgba(255,107,53,0.05) 0%, transparent 50%);
  background-size: 48px 48px, 48px 48px, 100% 100%, 100% 100%;
  background-attachment: fixed;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

img, svg, video { max-width: 100%; height: auto; display: block; }
a { color: var(--c-accent); text-decoration: none; }
a:hover { color: var(--c-white); }
ul, ol { list-style: none; }
button { font-family: inherit; border: none; background: none; cursor: pointer; }

::selection {
  background: var(--c-accent);
  color: var(--c-bg);
}

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

/* ============ Layout Utilities ============ */
.container {
  width: 100%;
  max-width: calc(var(--container-w) + 48px);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: clamp(56px, 8vw, 120px) 0;
  position: relative;
}

.skip-link {
  position: fixed;
  top: -60px;
  left: 16px;
  z-index: 300;
  background: var(--c-accent);
  color: var(--c-bg);
  font-weight: 700;
  font-size: 14px;
  padding: 12px 24px;
  border-radius: 0 0 8px 8px;
  transition: top 0.25s var(--ease);
}
.skip-link:focus {
  top: 0;
  outline: none;
}

.divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--c-border) 20%, var(--c-border) 80%, transparent);
  border: none;
  margin: 0;
}

.text-muted { color: var(--c-gray); }
.text-accent { color: var(--c-accent); }
.text-orange { color: var(--c-orange); }

/* ============ Section Title ============ */
.section-title {
  margin-bottom: clamp(32px, 5vw, 64px);
  position: relative;
}
.section-title__label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--c-accent);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
}
.section-title__label::before {
  content: '';
  display: inline-block;
  width: 24px;
  height: 2px;
  background: var(--c-accent);
}
.section-title__main {
  font-family: var(--font-headline);
  font-size: clamp(34px, 5vw, 56px);
  line-height: 0.95;
  font-weight: 800;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--c-white);
}
.section-title__desc {
  font-size: 15px;
  line-height: 1.7;
  color: var(--c-gray);
  margin-top: 14px;
  max-width: 640px;
}
.section-title--center {
  text-align: center;
  margin-left: auto;
  margin-right: auto;
}
.section-title--center .section-title__desc {
  margin-left: auto;
  margin-right: auto;
}

/* ============ Buttons ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 30px;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 600;
  line-height: 1;
  letter-spacing: 0.6px;
  border-radius: 0;
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.25s var(--ease);
}
.btn:hover { transform: translateY(-2px); }
.btn--primary {
  background: var(--c-accent);
  color: var(--c-bg);
  font-weight: 700;
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 14px 100%, 0 calc(100% - 14px));
  padding: 16px 34px;
}
.btn--primary:hover {
  background: #52ff9d;
  color: var(--c-bg);
  box-shadow: 0 10px 30px rgba(57,255,136,0.25);
  transform: translateY(-2px);
}
.btn--ghost {
  background: transparent;
  border: 1px solid var(--c-border);
  color: var(--c-white);
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 14px 100%, 0 calc(100% - 14px));
}
.btn--ghost:hover {
  border-color: var(--c-accent);
  color: var(--c-accent);
  background: rgba(57,255,136,0.06);
}

/* ============ Tags ============ */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 1px;
  text-transform: uppercase;
  border: 1px solid var(--c-border);
  color: var(--c-gray);
  background: rgba(255,255,255,0.03);
  white-space: nowrap;
}
.tag--accent {
  border-color: rgba(57,255,136,0.35);
  color: var(--c-accent);
  background: rgba(57,255,136,0.08);
}
.tag--orange {
  border-color: rgba(255,107,53,0.35);
  color: var(--c-orange);
  background: rgba(255,107,53,0.08);
}

/* ============ Panel & Card ============ */
.panel {
  position: relative;
  background: linear-gradient(145deg, var(--c-panel) 0%, var(--c-bg-deep) 100%);
  border: 1px solid var(--c-border);
  border-left: 2px solid var(--c-accent);
  padding: clamp(28px, 5vw, 56px);
  box-shadow: 0 20px 48px rgba(0,0,0,0.3);
}
.panel[data-variant="plain"] {
  border-left-color: transparent;
}
.panel[data-variant="orange"] {
  border-left-color: var(--c-orange);
}

.card {
  background: linear-gradient(145deg, var(--c-panel) 0%, var(--c-bg-deep) 100%);
  border: 1px solid var(--c-border);
  padding: 28px;
  transition: border-color 0.25s var(--ease), box-shadow 0.25s var(--ease), transform 0.25s var(--ease);
}
.card:hover {
  border-color: rgba(57,255,136,0.4);
  box-shadow: 0 0 24px rgba(57,255,136,0.08);
  transform: scale(1.01);
}

/* ============ Media Frame ============ */
.media-frame {
  position: relative;
  overflow: hidden;
  background: var(--c-bg-deep);
  border: 1px solid var(--c-border);
  display: block;
  width: 100%;
}
.media-frame::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    linear-gradient(135deg, transparent 0%, transparent 30%, rgba(57,255,136,0.06) 30%, rgba(57,255,136,0.06) 33%, transparent 33%),
    linear-gradient(45deg, transparent 0%, rgba(148,163,184,0.05) 100%);
  z-index: 0;
  pointer-events: none;
}
.media-frame::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 64px;
  height: 3px;
  background: linear-gradient(90deg, var(--c-accent), var(--c-orange));
  z-index: 1;
  pointer-events: none;
}
.media-frame > * {
  position: relative;
  z-index: 2;
}
.media-frame[data-format="wide"] { aspect-ratio: 16 / 9; }
.media-frame[data-format="square"] { aspect-ratio: 1 / 1; }
.media-frame[data-format="portrait"] { aspect-ratio: 3 / 4; }
.media-frame[data-format="hero"] { aspect-ratio: 21 / 9; }

/* ============ Grid ============ */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

/* ============ Breadcrumb ============ */
.breadcrumb {
  margin-bottom: 32px;
}
.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 13px;
}
.breadcrumb__item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--c-gray);
}
.breadcrumb__item + .breadcrumb__item::before {
  content: '/';
  color: var(--c-gray);
  opacity: 0.5;
}
.breadcrumb__link {
  color: var(--c-gray);
}
.breadcrumb__link:hover {
  color: var(--c-accent);
}
.breadcrumb__item[aria-current="page"] {
  color: var(--c-white);
}

/* ============ Stat ============ */
.stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.stat__value {
  font-family: var(--font-mono);
  font-size: clamp(32px, 4vw, 52px);
  font-weight: 700;
  line-height: 1;
  color: var(--c-white);
  letter-spacing: -1px;
}
.stat__value[data-tone="accent"] { color: var(--c-accent); }
.stat__value[data-tone="orange"] { color: var(--c-orange); }
.stat__label {
  font-size: 13px;
  color: var(--c-gray);
  letter-spacing: 1px;
  text-transform: uppercase;
}

/* ============ Header ============ */
.site-header {
  position: fixed;
  top: 16px;
  left: 50%;
  transform: translateX(-50%);
  width: calc(100% - 32px);
  max-width: var(--container-w);
  min-height: var(--header-h);
  background: rgba(10, 14, 23, 0.84);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
  border: 1px solid var(--c-border);
  border-radius: 100px;
  z-index: 200;
  transition: top 0.3s var(--ease), box-shadow 0.3s var(--ease), background 0.3s var(--ease);
}
.site-header.is-scrolled {
  top: 8px;
  background: rgba(10, 14, 23, 0.92);
  box-shadow: 0 12px 40px rgba(0,0,0,0.45);
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
  padding: 0 20px 0 16px;
  gap: 16px;
}

/* Brand */
.site-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  flex-shrink: 0;
}
.site-brand__badge {
  font-family: var(--font-headline);
  font-weight: 800;
  font-size: 16px;
  letter-spacing: 1.5px;
  line-height: 1;
  background: var(--c-accent);
  color: var(--c-bg);
  padding: 6px 12px 6px 14px;
  display: inline-flex;
  align-items: center;
  clip-path: polygon(0 0, 100% 0, calc(100% - 8px) 100%, 0 100%);
}
.site-brand__name {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.4px;
  color: var(--c-white);
  white-space: nowrap;
}

/* Navigation */
.site-nav {
  display: flex;
  align-items: center;
}
.site-nav__list {
  display: flex;
  align-items: center;
  gap: 2px;
}
.site-nav__link {
  display: inline-flex;
  align-items: center;
  padding: 8px 16px;
  font-size: 14px;
  font-weight: 500;
  color: var(--c-gray);
  text-decoration: none;
  border-radius: 999px;
  white-space: nowrap;
  transition: color 0.2s var(--ease), background 0.2s var(--ease), box-shadow 0.2s var(--ease);
}
.site-nav__link:hover {
  color: var(--c-white);
  background: rgba(255,255,255,0.06);
}
.site-nav__link[aria-current="page"] {
  color: var(--c-accent);
  background: rgba(57,255,136,0.1);
  box-shadow: 0 0 12px rgba(57,255,136,0.15);
}

/* Nav Toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--c-border);
  background: rgba(255,255,255,0.04);
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease);
}
.nav-toggle:hover {
  border-color: var(--c-accent);
  background: rgba(57,255,136,0.08);
}
.nav-toggle__line {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--c-white);
  border-radius: 2px;
  transition: transform 0.3s var(--ease), opacity 0.2s var(--ease);
}
.nav-toggle[data-open] .nav-toggle__line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
  background: var(--c-accent);
}
.nav-toggle[data-open] .nav-toggle__line:nth-child(2) {
  opacity: 0;
}
.nav-toggle[data-open] .nav-toggle__line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
  background: var(--c-accent);
}

/* Header Progress */
.header-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  z-index: 210;
  pointer-events: none;
}
.header-progress__bar {
  display: block;
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--c-accent), var(--c-orange));
  box-shadow: 0 0 8px rgba(57,255,136,0.5);
  transition: width 0.08s linear;
}

/* ============ Footer ============ */
.site-footer {
  position: relative;
  background: var(--c-bg-deep);
  border-top: 1px solid var(--c-border);
  padding: clamp(48px, 6vw, 88px) 0 40px;
  margin-top: clamp(48px, 8vw, 120px);
}
.site-footer::before {
  content: '';
  position: absolute;
  top: -1px;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--c-accent) 0%, transparent 30%, var(--c-orange) 70%, transparent 100%);
}
.site-footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: 48px;
  align-items: start;
}
.site-footer__col--brand {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.site-footer__brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}
.site-footer__brand-mark {
  font-family: var(--font-headline);
  font-weight: 800;
  font-size: 18px;
  letter-spacing: 2px;
  line-height: 1;
  background: var(--c-accent);
  color: var(--c-bg);
  padding: 6px 12px 6px 14px;
  display: inline-flex;
  align-items: center;
  clip-path: polygon(0 0, 100% 0, calc(100% - 8px) 100%, 0 100%);
}
.site-footer__brand-name {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 16px;
  letter-spacing: 0.4px;
  color: var(--c-white);
}
.site-footer__desc {
  font-size: 14px;
  line-height: 1.75;
  color: var(--c-gray);
}
.site-footer__trust {
  font-size: 13px;
  line-height: 1.7;
  color: var(--c-gray);
  border-left: 2px solid var(--c-accent);
  padding-left: 12px;
}
.site-footer__heading {
  font-family: var(--font-headline);
  font-size: 18px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--c-white);
  margin-bottom: 18px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--c-border);
}
.site-footer__nav {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.site-footer__nav a {
  font-size: 14px;
  color: var(--c-gray);
  transition: color 0.2s var(--ease), padding-left 0.2s var(--ease);
}
.site-footer__nav a:hover {
  color: var(--c-accent);
  padding-left: 6px;
}
.site-footer__contact {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 14px;
  color: var(--c-gray);
  font-style: normal;
}
.site-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  border-top: 1px solid var(--c-border);
  margin-top: 48px;
  padding-top: 24px;
}
.site-footer__icp,
.site-footer__copyright {
  font-size: 13px;
  color: var(--c-gray);
}

/* ============ Reveal Animation ============ */
[data-reveal] {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}
[data-reveal].is-revealed {
  opacity: 1;
  transform: translateY(0);
}

/* ============ Responsive ============ */
@media (max-width: 1100px) {
  .site-footer__grid {
    grid-template-columns: 1.5fr 1fr 1fr;
  }
  .site-footer__col--contact {
    grid-column: span 3;
    padding-top: 8px;
  }
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 991px) {
  .nav-toggle {
    display: inline-flex;
  }
  .site-nav {
    position: absolute;
    top: calc(100% + 8px);
    left: 12px;
    right: 12px;
    background: rgba(10, 14, 23, 0.96);
    border: 1px solid var(--c-border);
    border-radius: 20px;
    padding: 12px;
    box-shadow: 0 20px 48px rgba(0,0,0,0.5);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity 0.25s var(--ease), transform 0.25s var(--ease), visibility 0.25s;
    z-index: 190;
  }
  .site-nav[data-open] {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }
  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
  }
  .site-nav__link {
    padding: 12px 16px;
    width: 100%;
    border-radius: 12px;
    font-size: 15px;
  }
  .site-nav__link[aria-current="page"] {
    background: rgba(57,255,136,0.12);
  }
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
  .site-header__inner {
    padding: 0 14px 0 12px;
  }
}

@media (max-width: 767px) {
  .container {
    padding: 0 16px;
  }
  .site-header {
    width: calc(100% - 20px);
    top: 10px;
    border-radius: 60px;
  }
  .site-header.is-scrolled {
    top: 6px;
  }
  .site-brand__name {
    font-size: 13px;
  }
  .site-brand__badge {
    font-size: 14px;
    padding: 5px 10px 5px 12px;
  }
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
  .site-footer__grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .site-footer__col--contact {
    grid-column: span 1;
  }
  .site-footer__bottom {
    flex-direction: column;
    text-align: center;
  }
  .btn {
    width: 100%;
  }
  .btn--primary,
  .btn--ghost {
    width: 100%;
    justify-content: center;
  }
  .section-title__main {
    font-size: 32px;
  }
}

/* ============ Reduced Motion ============ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .site-header {
    transition: none;
  }
  .site-header.is-scrolled {
    top: 8px;
  }
}