*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --c-red: #E60012;
  --c-red-dark: #B3000E;
  --c-orange: #FF6A00;
  --c-orange-light: #FFB38A;
  --c-gold: #D4AF37;
  --c-dark: #333333;
  --c-light: #F5F5F5;
  --c-white: #FFFFFF;
  --c-black: #1A1A1A;
  --font-heading: 'Helvetica Neue', Arial, 'Microsoft YaHei', sans-serif;
  --font-body: 'PingFang SC', 'Microsoft YaHei', Arial, sans-serif;
  --font-data: 'Roboto Mono', Consolas, 'Courier New', monospace;
  --header-height: 72px;
  --container-max: 1200px;
  --shadow-card: 0 4px 20px rgba(51, 51, 51, 0.08);
  --shadow-hover: 0 14px 36px rgba(51, 51, 51, 0.14);
  --z-header: 1000;
  --z-progress: 1002;
  --z-backtop: 900;
}

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

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  color: var(--c-dark);
  background: var(--c-white);
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

main { display: block; }

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 800;
  font-style: italic;
  line-height: 1.15;
  color: var(--c-dark);
  margin: 0 0 0.5em;
}
h1 { font-size: clamp(34px, 5vw, 58px); }
h2 { font-size: clamp(26px, 4vw, 40px); }
h3 { font-size: clamp(20px, 2.5vw, 28px); }
p { margin: 0 0 1em; }
a { color: var(--c-red); }
ul, ol { padding-left: 1.4em; }
img, svg, video { max-width: 100%; height: auto; display: block; }
::selection { background: var(--c-red); color: var(--c-white); }

#main-content {
  outline: none;
  scroll-margin-top: var(--header-height);
}

@media (max-width: 600px) {
  h1 { font-size: clamp(30px, 8vw, 40px); }
  h2 { font-size: clamp(24px, 6vw, 32px); }
  body { font-size: 15px; }
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: clamp(16px, 4vw, 48px);
}

.divider-bar {
  height: 6px;
  border: 0;
  background: linear-gradient(90deg, var(--c-red) 0 38%, var(--c-orange) 38% 66%, var(--c-gold) 66% 100%);
}

.speed-lines {
  background-image: repeating-linear-gradient(
    -55deg,
    transparent 0 14px,
    rgba(255, 106, 0, 0.05) 14px 15px,
    transparent 15px 30px
  );
}

.skip-link {
  position: fixed;
  top: -120px;
  left: 16px;
  z-index: 2000;
  padding: 12px 22px;
  background: var(--c-red);
  color: var(--c-white);
  font-weight: 700;
  text-decoration: none;
  box-shadow: 0 4px 16px rgba(230, 0, 18, 0.4);
  transition: top 0.2s ease;
}
.skip-link:focus { top: 8px; }

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-header);
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background-color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}
.site-header[data-scrolled] {
  background: rgba(255, 255, 255, 0.97);
  border-bottom-color: rgba(230, 0, 18, 0.12);
  box-shadow: 0 8px 24px rgba(51, 51, 51, 0.08);
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  max-width: 1360px;
  margin-inline: auto;
  padding: 14px clamp(16px, 3vw, 40px);
  position: relative;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  flex-shrink: 0;
}
.brand__mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, var(--c-red) 0 55%, var(--c-orange) 55% 100%);
  clip-path: polygon(0 0, 100% 0, 100% 72%, 72% 100%, 0 100%);
  font-family: var(--font-heading);
  font-style: italic;
  font-weight: 800;
  font-size: 13px;
  color: var(--c-white);
  flex-shrink: 0;
}
.brand__mark::after { content: 'HT'; }
.brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.12;
}
.brand__name {
  font-family: var(--font-heading);
  font-style: italic;
  font-weight: 800;
  font-size: 19px;
  letter-spacing: 0.05em;
  color: var(--c-white);
  white-space: nowrap;
  transition: color 0.25s ease;
}
.brand__tag {
  font-family: var(--font-data);
  font-size: 10px;
  letter-spacing: 0.26em;
  color: var(--c-gold);
  text-transform: uppercase;
  white-space: nowrap;
}
.site-header[data-scrolled] .brand__name { color: var(--c-dark); }

.nav-toggle {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  width: 44px;
  height: 44px;
  padding: 10px;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 0;
  cursor: pointer;
  transition: border-color 0.2s ease, background-color 0.2s ease;
}
.nav-toggle__bar {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--c-white);
  transition: background-color 0.2s ease;
}
.nav-toggle:hover { border-color: var(--c-orange); }
.site-header[data-scrolled] .nav-toggle { border-color: rgba(51, 51, 51, 0.4); }
.site-header[data-scrolled] .nav-toggle__bar { background: var(--c-dark); }
.site-header[data-scrolled] .nav-toggle:hover { border-color: var(--c-red); }
.site-header[data-scrolled] .nav-toggle:hover .nav-toggle__bar { background: var(--c-red); }
.nav-toggle[aria-expanded="true"] { background: var(--c-red); border-color: var(--c-red); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar { background: var(--c-white); }

.site-nav {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.98);
  border-bottom: 3px solid var(--c-red);
  box-shadow: 0 20px 40px rgba(51, 51, 51, 0.18);
  visibility: hidden;
  opacity: 0;
  transform: translateY(-8px);
  transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s ease;
}
.site-nav[data-open] {
  visibility: visible;
  opacity: 1;
  transform: translateY(0);
}
.site-nav__list {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 0;
  margin: 0;
  padding: 8px 16px;
  list-style: none;
}
.site-nav__item { border-bottom: 1px solid #eee; }
.site-nav__item:last-child { border-bottom: none; }
.site-nav__link {
  display: block;
  padding: 14px 8px;
  font-size: 15px;
  font-weight: 600;
  color: var(--c-dark);
  text-decoration: none;
}
.site-nav__link:hover,
.site-nav__link[aria-current="page"] { color: var(--c-red); }

@media (min-width: 861px) {
  .nav-toggle { display: none; }
  .site-nav {
    position: static;
    background: transparent;
    border: none;
    box-shadow: none;
    opacity: 1;
    visibility: visible;
    transform: none;
    transition: none;
  }
  .site-nav__list {
    flex-direction: row;
    align-items: center;
    gap: 2px;
    padding: 0;
  }
  .site-nav__item { border: none; }
  .site-nav__link {
    display: inline-block;
    padding: 8px 14px;
    color: var(--c-white);
    position: relative;
    white-space: nowrap;
  }
  .site-nav__link::after {
    content: '';
    position: absolute;
    left: 14px;
    right: 14px;
    bottom: 4px;
    height: 2px;
    background: linear-gradient(90deg, var(--c-orange), var(--c-gold));
    transform: scaleX(0);
    transform-origin: left center;
    transition: transform 0.25s ease;
  }
  .site-nav__link:hover { color: var(--c-orange); }
  .site-nav__link:hover::after,
  .site-nav__link[aria-current="page"]::after { transform: scaleX(1); }
  .site-nav__link[aria-current="page"] { color: var(--c-orange); }
  .site-header[data-scrolled] .site-nav__link { color: var(--c-dark); }
  .site-header[data-scrolled] .site-nav__link:hover,
  .site-header[data-scrolled] .site-nav__link[aria-current="page"] { color: var(--c-red); }
  .site-header[data-scrolled] .site-nav__link[aria-current="page"]::after { background: var(--c-red); }
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0;
  z-index: var(--z-progress);
  background: linear-gradient(90deg, var(--c-red) 0 55%, var(--c-orange) 100%);
  pointer-events: none;
  transition: width 0.1s linear;
}

.back-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: var(--z-backtop);
  width: 46px;
  height: 46px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--c-red);
  border: 2px solid var(--c-white);
  border-radius: 0;
  box-shadow: 0 6px 16px rgba(230, 0, 18, 0.35);
  cursor: pointer;
  color: var(--c-white);
  opacity: 0;
  visibility: hidden;
  transform: translateY(14px);
  transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s ease, background-color 0.2s ease;
}
.back-to-top[data-visible] {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.back-to-top:hover { background: var(--c-orange); }
.back-to-top__arrow {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-top: 2px solid currentColor;
  border-left: 2px solid currentColor;
  transform: rotate(45deg);
  margin-top: 4px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.2;
  text-decoration: none;
  border: 2px solid transparent;
  border-radius: 0;
  cursor: pointer;
  position: relative;
  transition: background-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}
.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 0;
  height: 0;
  border-top: 14px solid var(--c-orange);
  border-right: 14px solid transparent;
}
.btn:hover { transform: translateY(-2px); }
.btn--primary { background: var(--c-red); color: var(--c-white); }
.btn--primary:hover { background: var(--c-red-dark); box-shadow: 0 8px 20px rgba(230, 0, 18, 0.3); }
.btn--ghost {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.55);
  color: var(--c-white);
}
.btn--ghost:hover { border-color: var(--c-white); background: rgba(255, 255, 255, 0.08); }
.btn--ghost::before { display: none; }

.section-label {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 14px;
  font-family: var(--font-heading);
  font-style: italic;
  font-weight: 800;
  font-size: 14px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-red);
}
.section-label__index {
  font-family: var(--font-data);
  font-style: normal;
  font-weight: 400;
  font-size: 22px;
  color: var(--c-gold);
}

.frame-hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  padding: calc(var(--header-height) + 40px) 0 64px;
  background:
    radial-gradient(1200px 500px at 85% 25%, rgba(255, 106, 0, 0.22) 0%, transparent 60%),
    radial-gradient(900px 400px at 5% 85%, rgba(212, 175, 55, 0.12) 0%, transparent 50%),
    linear-gradient(125deg, #170a0c 0%, #900012 48%, #C70011 74%, #E60012 100%);
  color: var(--c-white);
  overflow: hidden;
}
.frame-hero::before {
  content: '';
  position: absolute;
  top: 30px;
  left: 30px;
  right: 30px;
  bottom: 30px;
  border: 1px solid rgba(255, 255, 255, 0.25);
  clip-path: polygon(28px 0, 100% 0, 100% calc(100% - 28px), calc(100% - 28px) 100%, 0 100%, 0 28px);
  pointer-events: none;
  z-index: 0;
}
.frame-hero::after {
  content: '';
  position: absolute;
  top: 16px;
  left: 16px;
  width: 72px;
  height: 72px;
  border-top: 4px solid var(--c-gold);
  border-left: 4px solid var(--c-gold);
  pointer-events: none;
  z-index: 1;
}
.frame-hero .container { position: relative; z-index: 2; }
.frame-hero h1 {
  color: var(--c-white);
  font-size: clamp(38px, 6vw, 68px);
  line-height: 0.98;
  text-transform: uppercase;
  margin-bottom: 16px;
  max-width: 12em;
}
.frame-hero h1 em { color: var(--c-orange); font-style: italic; }
.frame-hero__lead {
  font-size: 18px;
  color: rgba(255, 255, 255, 0.85);
  max-width: 36em;
  margin-bottom: 32px;
}

.page-hero {
  position: relative;
  padding: calc(var(--header-height) + 56px) 0 48px;
  margin-bottom: 48px;
  background:
    repeating-linear-gradient(-55deg, rgba(255, 255, 255, 0.04) 0 10px, transparent 10px 20px),
    linear-gradient(125deg, #170a0c 0%, #900012 55%, #E60012 120%);
  color: var(--c-white);
  overflow: hidden;
}
.page-hero h1 { color: var(--c-white); margin-bottom: 4px; }
.page-hero .breadcrumb { margin: 12px 0 0; }
.page-hero .breadcrumb a { color: rgba(255, 255, 255, 0.75); }
.page-hero .breadcrumb a:hover { color: var(--c-white); }
.page-hero .breadcrumb [aria-current="page"] { color: rgba(255, 255, 255, 0.9); }

.breadcrumb {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 24px 0;
  padding: 0;
  font-size: 14px;
}
.breadcrumb li + li::before {
  content: '/';
  margin-right: 8px;
  color: var(--c-orange);
}
.breadcrumb a { color: var(--c-red); text-decoration: none; }
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb [aria-current="page"] { color: var(--c-dark); font-weight: 700; }

.data-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 24px;
  margin-bottom: 32px;
}
.data-card {
  position: relative;
  background: var(--c-white);
  border-top: 4px solid var(--c-red);
  box-shadow: var(--shadow-card);
  padding: 24px;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.data-card::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 26px;
  height: 26px;
  background: linear-gradient(225deg, var(--c-orange) 0 50%, transparent 50%);
}
.data-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.data-card__num {
  font-family: var(--font-data);
  font-size: 40px;
  font-weight: 700;
  line-height: 1;
  color: var(--c-red);
}
.data-card__label {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #888;
  margin-top: 8px;
}
.data-card__value {
  font-family: var(--font-data);
  font-size: 14px;
  color: var(--c-dark);
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid #eee;
}

.panel-cut {
  position: relative;
  background: var(--c-white);
  padding: 32px;
  box-shadow: var(--shadow-card);
}
.panel-cut::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 0;
  height: 0;
  border-top: 20px solid var(--c-red);
  border-right: 20px solid transparent;
}
.panel-cut::after {
  content: '';
  position: absolute;
  bottom: 0;
  right: 0;
  width: 0;
  height: 0;
  border-bottom: 14px solid var(--c-orange);
  border-left: 14px solid transparent;
}

.image-frame {
  position: relative;
  display: block;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: linear-gradient(135deg, #e8e8e8 0%, var(--c-light) 100%);
  clip-path: polygon(20px 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%, 0 20px);
}
.image-frame > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.image-frame:hover > img { transform: scale(1.04); }
.image-frame--wide { aspect-ratio: 21 / 9; }
.image-frame--tall { aspect-ratio: 3 / 4; }

[data-reveal] {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
[data-reveal][data-revealed] {
  opacity: 1;
  transform: translateY(0);
}

.site-footer {
  position: relative;
  margin-top: 72px;
  background: linear-gradient(180deg, #1e1e1e 0%, #2a2a2a 100%);
  color: rgba(255, 255, 255, 0.7);
}
.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--c-red) 0 30%, var(--c-orange) 30% 60%, var(--c-gold) 60% 100%);
}
.site-footer__top { padding: 56px 0 40px; }
.site-footer__grid {
  display: grid;
  grid-template-columns: 1.6fr 0.8fr 0.8fr 1.2fr;
  gap: 40px;
}
.site-footer__info .brand { margin-bottom: 16px; }
.site-footer .brand__name { color: var(--c-white); font-size: 21px; }
.site-footer .brand__tag { color: var(--c-gold); font-size: 10px; }
.site-footer__desc { font-size: 14px; margin-bottom: 10px; max-width: 32em; }
.site-footer__trust {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.55);
  border-left: 3px solid var(--c-orange);
  padding-left: 12px;
  margin-bottom: 0;
}
.site-footer__heading {
  font-family: var(--font-heading);
  font-style: italic;
  font-weight: 800;
  font-size: 16px;
  color: var(--c-white);
  letter-spacing: 0.06em;
  margin-bottom: 16px;
  padding-bottom: 8px;
  position: relative;
}
.site-footer__heading::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 28px;
  height: 2px;
  background: var(--c-orange);
}
.site-footer__links { list-style: none; padding: 0; margin: 0; }
.site-footer__links li { margin-bottom: 10px; }
.site-footer__links a {
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  font-size: 14px;
  transition: color 0.2s ease, padding-left 0.2s ease;
}
.site-footer__links a:hover { color: var(--c-orange); padding-left: 4px; }
.site-footer__contact { list-style: none; padding: 0; margin: 0; }
.site-footer__contact li {
  display: flex;
  flex-direction: column;
  margin-bottom: 12px;
  font-size: 14px;
  line-height: 1.5;
}
.site-footer__contact-label {
  display: inline-block;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-gold);
  margin-bottom: 2px;
}
.site-footer__contact-value { display: inline-block; }
.site-footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 16px 0;
}
.site-footer__bottom-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 16px;
}
.site-footer__copyright {
  font-size: 13px;
  margin: 0;
  color: rgba(255, 255, 255, 0.55);
}
.site-footer__icp {
  font-size: 13px;
  margin: 0;
  color: rgba(255, 255, 255, 0.55);
}
.site-footer__icp a { color: rgba(255, 255, 255, 0.65); text-decoration: none; }
.site-footer__icp a:hover { color: var(--c-orange); }
.site-footer__sep { margin: 0 6px; color: var(--c-orange); }

:focus-visible {
  outline: 3px solid var(--c-orange);
  outline-offset: 3px;
}

@media (max-width: 1024px) {
  .site-footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
  .site-footer__info { grid-column: 1 / -1; }
}

@media (max-width: 600px) {
  .site-footer__grid { grid-template-columns: 1fr; }
  .site-header__inner { padding: 12px 16px; }
  .brand__name { font-size: 17px; }
  .brand__mark { width: 34px; height: 34px; font-size: 12px; }
  .frame-hero { padding-top: calc(var(--header-height) + 20px); }
  .frame-hero::before { top: 16px; left: 16px; right: 16px; bottom: 16px; }
  .frame-hero::after { top: 8px; left: 8px; width: 48px; height: 48px; border-width: 3px; }
  .back-to-top { right: 16px; bottom: 16px; width: 42px; height: 42px; }
  .page-hero { padding-top: calc(var(--header-height) + 36px); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .scroll-progress { display: none; }
}