:root {
  --brand-orange: #FF4B2B;
  --ink-black: #0A0A0A;
  --paper-white: #F5F5F0;
  --deep-blue: #1B2A4A;
  --bright-yellow: #FFD500;
  --gray-900: #1F1F1F;
  --gray-600: #5B5B5B;
  --gray-200: #E0E0E0;
  --white: #FFFFFF;
  --font-head: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --container-w: 1280px;
  --gutter: clamp(16px, 4vw, 48px);
  --header-h: 68px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 96px;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.75;
  color: var(--ink-black);
  background: var(--paper-white);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 900;
  line-height: 1.15;
  color: var(--ink-black);
}

p {
  margin: 0;
}

ul, ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
}

main {
  display: block;
}

[hidden] {
  display: none !important;
}

::selection {
  background: var(--brand-orange);
  color: var(--white);
}

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

.main-content {
  min-height: 60vh;
}

.main-content:focus {
  outline: none;
}

.container {
  width: 100%;
  max-width: var(--container-w);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.mono {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
}

.text-center {
  text-align: center;
}

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 1000;
  padding: 10px 16px;
  background: var(--ink-black);
  color: var(--white);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 700;
  border: 1px solid var(--brand-orange);
  transform: translateY(-150%);
  transition: transform 0.2s var(--ease);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  background: var(--paper-white);
}

.header-announce {
  padding: 8px 16px;
  background: var(--ink-black);
  color: var(--bright-yellow);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-align: center;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  border-bottom: 1px solid var(--gray-900);
}

.header-announce::before {
  content: "●";
  color: var(--brand-orange);
  margin-right: 8px;
}

.header-main {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--paper-white);
  border-bottom: 2px solid var(--ink-black);
}

.header-inner {
  position: relative;
  display: flex;
  align-items: center;
  gap: 16px;
  min-height: var(--header-h);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-right: auto;
  padding: 8px 0;
}

.brand-mark {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  background: var(--ink-black);
  color: var(--white);
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 1.125rem;
  line-height: 1;
  flex-shrink: 0;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.brand-name {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 1.25rem;
  letter-spacing: 0.02em;
  color: var(--ink-black);
}

.brand-slogan {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  color: var(--gray-600);
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 10px;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 2px;
}

.main-nav-item {
  position: relative;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 10px 11px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 0.875rem;
  white-space: nowrap;
  color: var(--ink-black);
  background: transparent;
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease);
}

.nav-index {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  font-weight: 400;
  letter-spacing: 0.06em;
  color: var(--gray-600);
  transition: color 0.2s var(--ease);
}

.nav-status {
  width: 6px;
  height: 6px;
  background: var(--gray-200);
  display: inline-block;
  flex-shrink: 0;
  transition: background-color 0.2s var(--ease);
}

.nav-link:hover {
  background: var(--ink-black);
  color: var(--white);
}

.nav-link:hover .nav-index {
  color: var(--bright-yellow);
}

.nav-link:hover .nav-status {
  background: var(--brand-orange);
}

.nav-link:active {
  background: var(--gray-900);
  color: var(--white);
}

.nav-link[aria-current="page"] {
  background: var(--brand-orange);
  color: var(--white);
}

.nav-link[aria-current="page"] .nav-index {
  color: var(--bright-yellow);
}

.nav-link[aria-current="page"] .nav-status {
  background: var(--white);
}

.header-cta {
  padding: 10px 16px;
  font-size: 0.875rem;
  white-space: nowrap;
}

.header-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  margin-left: 12px;
  padding: 10px 14px;
  border: 1px solid var(--ink-black);
  background: var(--white);
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 0.9375rem;
  line-height: 1;
  box-shadow: 3px 3px 0 var(--ink-black);
  transition: background-color 0.2s var(--ease), box-shadow 0.2s var(--ease), transform 0.1s ease;
}

.header-toggle:hover {
  background: var(--bright-yellow);
}

.header-toggle:active {
  transform: translate(2px, 2px);
  box-shadow: 0 0 0 var(--ink-black);
}

.toggle-icon {
  display: inline-grid;
  gap: 4px;
  width: 18px;
}

.toggle-icon span {
  display: block;
  height: 2px;
  background: var(--ink-black);
  transition: transform 0.2s var(--ease), opacity 0.2s var(--ease);
}

.header-toggle[aria-expanded="true"] .toggle-icon span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.header-toggle[aria-expanded="true"] .toggle-icon span:nth-child(2) {
  opacity: 0;
}

.header-toggle[aria-expanded="true"] .toggle-icon span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

.toggle-text {
  font-weight: 700;
}

.site-footer {
  position: relative;
  overflow: hidden;
  background: var(--ink-black);
  color: var(--paper-white);
  border-top: 4px solid var(--brand-orange);
}

.footer-glyph {
  position: absolute;
  right: -20px;
  bottom: -0.25em;
  z-index: 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(5rem, 16vw, 13rem);
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px var(--gray-900);
  pointer-events: none;
  user-select: none;
}

.footer-main {
  position: relative;
  z-index: 1;
  padding: clamp(48px, 8vw, 96px) 0 clamp(24px, 4vw, 48px);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: clamp(24px, 4vw, 64px);
}

.footer-brand-col,
.footer-col {
  min-width: 0;
}

.brand--footer .brand-mark {
  background: var(--brand-orange);
  color: var(--white);
}

.brand--footer .brand-name {
  color: var(--white);
}

.brand--footer .brand-slogan {
  color: var(--gray-600);
}

.footer-trust {
  margin-top: 20px;
  max-width: 480px;
  font-size: 0.9375rem;
  color: var(--gray-200);
}

.footer-note {
  margin-top: 16px;
  max-width: 460px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  line-height: 1.7;
  color: var(--gray-600);
}

.footer-heading {
  margin-bottom: 18px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 400;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--bright-yellow);
}

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.footer-contact-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 8px 0;
  border-bottom: 1px solid var(--gray-900);
  color: var(--paper-white);
  line-height: 1.5;
}

.mono-label {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gray-600);
}

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a {
  color: var(--paper-white);
  font-family: var(--font-head);
  font-weight: 700;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-bottom-color 0.2s var(--ease);
}

.footer-links a::before {
  content: "→ ";
  font-family: var(--font-mono);
  color: var(--brand-orange);
}

.footer-links a:hover {
  color: var(--brand-orange);
  border-bottom-color: var(--brand-orange);
}

.footer-bottom {
  position: relative;
  z-index: 1;
  background: var(--gray-900);
  border-top: 1px solid var(--ink-black);
}

.footer-bottom-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 24px;
  padding-top: 16px;
  padding-bottom: 16px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--gray-200);
}

.footer-tagline {
  letter-spacing: 0.12em;
  color: var(--gray-600);
}

.page-header {
  position: relative;
  padding: clamp(56px, 9vw, 128px) 0 clamp(32px, 5vw, 72px);
  border-bottom: 1px solid var(--ink-black);
  background: var(--paper-white);
}

.page-header::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: -1px;
  width: min(160px, 30%);
  height: 6px;
  background: var(--brand-orange);
}

.page-title {
  font-size: clamp(2.25rem, 6vw, 5rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
  text-transform: uppercase;
}

.page-lead {
  max-width: 660px;
  margin-top: 16px;
  font-size: 1.0625rem;
  color: var(--gray-600);
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px;
  margin-bottom: 24px;
  padding-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  border-bottom: 1px solid var(--gray-200);
}

.breadcrumbs a {
  padding: 4px 6px;
  color: var(--gray-600);
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-bottom-color 0.2s var(--ease);
}

.breadcrumbs a:hover {
  color: var(--brand-orange);
  border-bottom-color: var(--brand-orange);
}

.crumb-sep {
  color: var(--gray-200);
  padding: 4px 2px;
}

.crumb-current {
  padding: 4px 6px;
  font-weight: 700;
  color: var(--ink-black);
}

.section {
  padding: clamp(48px, 8vw, 104px) 0;
}

.section--dark {
  background: var(--ink-black);
  color: var(--paper-white);
}

.section--gray {
  background: var(--gray-900);
  color: var(--paper-white);
}

.section--dark .section-title,
.section--dark .page-title,
.section--gray .section-title,
.section--gray .page-title {
  color: var(--white);
}

.section--dark .section-label,
.section--gray .section-label {
  color: var(--gray-200);
}

.section--dark .section-label::after,
.section--gray .section-label::after {
  background: var(--gray-600);
}

.section-label {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gray-600);
}

.section-label::before {
  content: "";
  width: 24px;
  height: 2px;
  background: var(--brand-orange);
  flex-shrink: 0;
}

.section-label::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--gray-200);
}

.section-title {
  margin-bottom: 16px;
  font-size: clamp(1.75rem, 4vw, 3rem);
  letter-spacing: -0.01em;
}

.grid {
  display: grid;
  gap: clamp(16px, 2vw, 32px);
}

.grid--2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid--3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid--4 {
  grid-template-columns: repeat(4, 1fr);
}

.divider {
  border: 0;
  border-top: 1px solid var(--ink-black);
  margin: 0;
}

.divider--dashed {
  border-top-style: dashed;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 20px;
  border: 1px solid var(--ink-black);
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 0.9375rem;
  line-height: 1.2;
  text-align: center;
  box-shadow: 4px 4px 0 var(--ink-black);
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease), transform 0.1s ease, box-shadow 0.2s var(--ease);
}

.btn:hover {
  transform: translate(-1px, -1px);
  box-shadow: 5px 5px 0 var(--ink-black);
}

.btn:active {
  transform: translate(3px, 3px);
  box-shadow: 1px 1px 0 var(--ink-black);
}

.btn-primary {
  background: var(--brand-orange);
  color: var(--white);
}

.btn-primary:hover {
  background: var(--ink-black);
  color: var(--bright-yellow);
}

.btn-outline {
  background: transparent;
  color: var(--ink-black);
  box-shadow: 0 0 0 var(--ink-black);
}

.btn-outline:hover {
  background: var(--ink-black);
  color: var(--white);
  box-shadow: 4px 4px 0 var(--gray-200);
}

.btn-blue {
  background: var(--deep-blue);
  color: var(--white);
}

.btn-blue:hover {
  background: var(--ink-black);
  color: var(--white);
  box-shadow: 4px 4px 0 var(--deep-blue);
}

.btn-yellow {
  background: var(--bright-yellow);
  color: var(--ink-black);
}

.btn-yellow:hover {
  background: var(--ink-black);
  color: var(--bright-yellow);
  box-shadow: 4px 4px 0 var(--brand-orange);
}

.badge {
  display: inline-block;
  padding: 4px 10px;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  background: var(--ink-black);
  color: var(--white);
  border: 1px solid var(--ink-black);
}

.badge-new {
  background: var(--bright-yellow);
  color: var(--ink-black);
}

.badge-orange {
  background: var(--brand-orange);
  color: var(--white);
  border-color: var(--brand-orange);
}

.badge-blue {
  background: var(--deep-blue);
  color: var(--white);
  border-color: var(--deep-blue);
}

.card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  padding: clamp(20px, 3vw, 32px);
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease), transform 0.2s var(--ease);
}

.card:hover {
  border-color: var(--brand-orange);
  box-shadow: 6px 6px 0 var(--gray-200);
  transform: translate(-2px, -2px);
}

.status-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  margin-right: 6px;
  background: var(--brand-orange);
  vertical-align: 2px;
}

.img-container {
  position: relative;
  display: block;
  overflow: hidden;
  background: var(--gray-900);
  border: 1px solid var(--ink-black);
}

.img-container::before {
  content: "";
  display: block;
  padding-top: 56.25%;
}

.img-container--wide::before {
  padding-top: 41.66%;
}

.img-container--tall::before {
  padding-top: 75%;
}

.img-container--square::before {
  padding-top: 100%;
}

.img-container--portrait::before {
  padding-top: 125%;
}

.img-container--sports::before {
  padding-top: 66.66%;
}

.img-container img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.img-placeholder {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gray-600);
  background:
    linear-gradient(135deg, transparent 47%, var(--gray-900) 47%, var(--gray-900) 49%, transparent 50%),
    linear-gradient(45deg, transparent 47%, var(--gray-900) 47%, var(--gray-900) 49%, transparent 50%),
    var(--gray-200);
  background-size: 20px 20px;
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding-bottom: 28px;
  margin-bottom: 36px;
  border-bottom: 1px solid var(--ink-black);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border: 1px solid var(--ink-black);
  background: var(--white);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  cursor: pointer;
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.tag:hover {
  border-color: var(--brand-orange);
  color: var(--brand-orange);
}

.tag[aria-pressed="true"],
.tag.is-active {
  background: var(--ink-black);
  color: var(--white);
  border-color: var(--ink-black);
}

.tag[aria-pressed="true"]::before,
.tag.is-active::before {
  content: "●";
  color: var(--brand-orange);
  font-size: 8px;
}

.accordion {
  border: 1px solid var(--ink-black);
  background: var(--white);
}

.accordion-item {
  border-bottom: 1px solid var(--gray-200);
}

.accordion-item:last-child {
  border-bottom: 0;
}

.accordion-btn {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  padding: 18px 20px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1rem;
  text-align: left;
  background: var(--paper-white);
  transition: background-color 0.2s var(--ease);
}

.accordion-btn:hover {
  background: var(--bright-yellow);
}

.accordion-btn[aria-expanded="true"] {
  background: var(--ink-black);
  color: var(--white);
}

.accordion-icon {
  display: grid;
  place-items: center;
  width: 20px;
  height: 20px;
  font-family: var(--font-mono);
  font-size: 1.25rem;
  line-height: 1;
  transition: transform 0.2s var(--ease);
}

.accordion-btn[aria-expanded="true"] .accordion-icon {
  transform: rotate(45deg);
}

.accordion-content {
  display: none;
  padding: 0 20px 20px;
  color: var(--gray-600);
  line-height: 1.8;
}

.accordion-item[data-open] .accordion-content {
  display: block;
  padding-top: 4px;
}

[data-reveal] {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}

[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

.back-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 90;
  width: 44px;
  height: 44px;
  background: var(--brand-orange);
  color: var(--white);
  border: 1px solid var(--ink-black);
  font-family: var(--font-mono);
  font-size: 1.25rem;
  line-height: 1;
  box-shadow: 3px 3px 0 var(--ink-black);
  opacity: 0;
  pointer-events: none;
  transform: translateY(12px);
  transition: opacity 0.2s var(--ease), transform 0.2s var(--ease), background-color 0.2s var(--ease);
}

.back-to-top.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--ink-black);
  color: var(--bright-yellow);
}

@media (max-width: 1080px) {
  .header-toggle {
    display: inline-flex;
  }

  .header-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px;
    background: var(--paper-white);
    border-bottom: 2px solid var(--ink-black);
    box-shadow: 0 18px 30px rgba(10, 10, 10, 0.16);
  }

  .header-nav[data-open] {
    display: flex;
  }

  .main-nav {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .main-nav-item {
    border-bottom: 1px solid var(--gray-200);
  }

  .main-nav-item:last-child {
    border-bottom: 0;
  }

  .nav-link {
    justify-content: flex-start;
    padding: 15px 12px;
    font-size: 1rem;
  }

  .nav-status {
    margin-left: auto;
  }

  .header-cta {
    margin: 12px 0 0;
    display: block;
    text-align: center;
  }
}

@media (max-width: 960px) {
  .grid--4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid--3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 900px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }

  .footer-brand-col {
    grid-column: 1 / -1;
  }
}

@media (max-width: 640px) {
  .header-inner {
    min-height: 60px;
  }

  .brand-mark {
    width: 32px;
    height: 32px;
    font-size: 0.9375rem;
  }

  .brand-name {
    font-size: 1.0625rem;
  }

  .brand-slogan {
    font-size: 0.625rem;
  }

  .header-announce {
    font-size: 0.6875rem;
  }

  .grid--2,
  .grid--3,
  .grid--4 {
    grid-template-columns: 1fr;
  }

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

  .footer-brand-col {
    grid-column: auto;
  }

  .footer-bottom-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}

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

  [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .back-to-top,
  .header-toggle,
  .header-toggle .toggle-icon span {
    transition: none;
  }
}