/* /assets/site.css */

:root {
  --c-primary: #D32F2F;
  --c-primary-deep: #B71C1C;
  --c-black: #0A0A0A;
  --c-carbon: #1A1A1A;
  --c-gold: #FFC107;
  --c-gold-light: #FFD54F;
  --c-white: #FFFFFF;
  --c-gray-light: #E0E0E0;
  --c-gray-mid: #9E9E9E;
  --c-line: #424242;

  --rail-w: 288px;
  --header-h: 68px;
  --content-max: 1360px;
  --gutter: clamp(16px, 3.5vw, 48px);
  --grid-gap: clamp(16px, 3vw, 40px);

  --font-heading: "Oswald", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-number: "Roboto Mono", "SFMono-Regular", Consolas, monospace;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
}

body {
  margin: 0;
  min-height: 100vh;
  padding-top: var(--header-h);
  background: var(--c-black);
  color: var(--c-white);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  position: relative;
}

body::before {
  content: "";
  position: fixed;
  top: 0;
  right: 0;
  width: 140px;
  height: 140px;
  background: linear-gradient(135deg, transparent 50%, rgba(211, 47, 47, 0.35) 50%);
  pointer-events: none;
  z-index: 0;
}

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

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

a {
  color: inherit;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  color: var(--c-white);
}

p {
  margin: 0 0 1em;
}

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

#main-content {
  position: relative;
  z-index: 1;
  display: block;
  outline: none;
}

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

::selection {
  background: var(--c-primary);
  color: var(--c-white);
}

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 1200;
  padding: 10px 16px;
  background: var(--c-gold);
  color: var(--c-black);
  font-family: var(--font-heading);
  font-weight: 700;
  text-decoration: none;
  border-radius: 4px;
  transform: translateY(-160%);
  transition: transform 0.2s ease;
}

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

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  gap: 12px;
  height: var(--header-h);
  padding: 0 max(16px, 2vw);
  background: var(--c-carbon);
  border-bottom: 1px solid var(--c-line);
}

.site-header::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 64px;
  height: 4px;
  background: var(--c-gold);
  opacity: 0.85;
  pointer-events: none;
}

.header__progress {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--c-primary), var(--c-gold));
  transform: scaleX(0);
  transform-origin: left;
  pointer-events: none;
  will-change: transform;
}

.brand {
  display: inline-flex;
  flex-direction: column;
  gap: 3px;
  flex-shrink: 0;
  text-decoration: none;
  color: var(--c-white);
  line-height: 1.1;
  order: 1;
}

.brand__mark {
  font-family: var(--font-heading);
  font-size: clamp(1.2rem, 2.4vw, 1.55rem);
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 1;
}

.brand__en {
  font-family: var(--font-number);
  font-size: 0.65rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--c-gold);
}

.header__cta {
  order: 3;
  margin-left: auto;
  flex-shrink: 0;
}

.nav-toggle {
  order: 4;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 8px;
  color: var(--c-white);
  font-family: var(--font-body);
  font-size: 0.85rem;
  transition: color 0.2s ease;
}

.nav-toggle:hover {
  color: var(--c-gold);
}

.nav-toggle__label {
  display: none;
}

@media (min-width: 480px) {
  .nav-toggle__label {
    display: inline;
  }
}

.nav-toggle__icon {
  position: relative;
  display: block;
  width: 22px;
  height: 14px;
}

.nav-toggle__icon::before,
.nav-toggle__icon::after {
  content: "";
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: currentColor;
  transition: transform 0.2s ease, top 0.2s ease, bottom 0.2s ease, box-shadow 0.2s ease;
}

.nav-toggle__icon::before {
  top: 0;
  box-shadow: 0 6px 0 currentColor;
}

.nav-toggle__icon::after {
  bottom: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__icon::before {
  top: 6px;
  box-shadow: none;
  transform: rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__icon::after {
  bottom: 6px;
  transform: rotate(-45deg);
}

.site-nav {
  order: 2;
  position: fixed;
  top: var(--header-h);
  left: 0;
  right: 0;
  z-index: 999;
  display: block;
  padding: 12px 16px 20px;
  background: var(--c-carbon);
  border-bottom: 1px solid var(--c-line);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.35);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
}

.site-nav[data-open] {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  pointer-events: auto;
}

.nav-list {
  display: grid;
  gap: 2px;
}

.nav-list__item {
  margin: 0;
}

.nav-list__link {
  position: relative;
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 8px 10px;
  color: var(--c-gray-light);
  text-decoration: none;
  font-family: var(--font-heading);
  font-weight: 500;
  letter-spacing: 0.05em;
  border-left: 3px solid transparent;
  transition: color 0.2s ease, background 0.2s ease, border-color 0.2s ease, padding-left 0.2s ease;
}

.nav-list__link::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 5px;
  height: 1px;
  background: var(--c-gold);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.2s ease;
}

.nav-list__link:hover {
  color: var(--c-white);
  background: rgba(211, 47, 47, 0.12);
  border-left-color: var(--c-primary);
  padding-left: 16px;
}

.nav-list__link:hover::after {
  transform: scaleX(1);
}

.nav-list__link[aria-current="page"] {
  color: var(--c-gold);
  border-left-color: var(--c-gold);
}

.nav-list__link[aria-current="page"]::after {
  transform: scaleX(1);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5em;
  min-height: 44px;
  padding: 0.7em 1.2em;
  border: 1px solid transparent;
  border-radius: 2px;
  font-family: var(--font-heading);
  font-weight: 500;
  font-size: 1rem;
  letter-spacing: 0.04em;
  text-decoration: none;
  transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
}

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

.btn--primary:hover {
  background: var(--c-primary-deep);
  box-shadow: 0 0 0 3px rgba(255, 193, 7, 0.25);
}

.btn--outline {
  background: transparent;
  color: var(--c-white);
  border-color: var(--c-line);
}

.btn--outline:hover {
  border-color: var(--c-gold);
  color: var(--c-gold);
}

.site-footer {
  position: relative;
  z-index: 1;
  background: var(--c-carbon);
  border-top: 1px solid var(--c-line);
  padding: 56px 0 28px;
}

.footer__inner {
  width: 100%;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.footer__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(24px, 4vw, 56px);
}

.footer__brand {
  min-width: 0;
}

.brand--footer {
  margin-bottom: 12px;
}

.footer__tagline {
  max-width: 34ch;
  margin: 0;
  color: var(--c-gray-light);
  font-size: 0.95rem;
  line-height: 1.7;
}

.footer__contact,
.footer__legal {
  min-width: 0;
}

.footer__heading {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 14px;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-gold);
}

.footer__heading::before {
  content: "";
  width: 16px;
  height: 2px;
  background: var(--c-primary);
}

.footer__list {
  display: grid;
  gap: 8px;
}

.footer__list li {
  color: var(--c-gray-light);
}

.footer__list a {
  color: var(--c-gray-light);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.footer__list a:hover {
  color: var(--c-gold);
  border-bottom-color: var(--c-gold);
}

.footer__bottom {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  justify-content: space-between;
  border-top: 1px solid var(--c-line);
  margin-top: 40px;
  padding-top: 20px;
  color: var(--c-gray-mid);
  font-size: 14px;
}

.footer__icp,
.footer__copyright {
  margin: 0;
}

.container {
  width: 100%;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.section {
  padding: clamp(48px, 8vw, 96px) 0;
}

.section--tight {
  padding: 32px 0;
}

.section-heading {
  position: relative;
  display: block;
  margin: 0 0 18px;
  font-size: clamp(2.2rem, 4vw, 3.5rem);
  line-height: 1.05;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.section-heading::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 38px;
  height: 4px;
  background: linear-gradient(90deg, var(--c-primary), var(--c-gold));
}

.section-lede {
  max-width: 64ch;
  margin: 0 0 24px;
  color: var(--c-gray-light);
  font-size: 1.05rem;
  line-height: 1.6;
}

.grid {
  display: grid;
  gap: var(--grid-gap);
}

.grid--2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid--3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

@media (max-width: 1024px) {
  .grid--3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 680px) {
  .grid--2,
  .grid--3 {
    grid-template-columns: 1fr;
  }
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  margin: 0 0 24px;
  color: var(--c-gray-mid);
  font-size: 0.9rem;
}

.breadcrumbs__item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.breadcrumbs__item + .breadcrumbs__item::before {
  content: "/";
  color: var(--c-line);
}

.breadcrumbs__link {
  color: var(--c-gray-light);
  text-decoration: none;
  transition: color 0.2s ease;
}

.breadcrumbs__link:hover {
  color: var(--c-gold);
}

.breadcrumbs__item[aria-current="page"] {
  color: var(--c-gold);
}

.media {
  position: relative;
  overflow: hidden;
  background: var(--c-carbon);
  border: 1px solid var(--c-line);
}

.media--wide {
  aspect-ratio: 16 / 9;
}

.media--portrait {
  aspect-ratio: 3 / 4;
}

.media--square {
  aspect-ratio: 1 / 1;
}

.media__fill {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.score {
  font-family: var(--font-number);
  font-weight: 500;
  font-size: clamp(2rem, 5vw, 3.5rem);
  line-height: 1;
  color: var(--c-white);
  letter-spacing: -0.02em;
  transition: transform 0.2s ease, color 0.2s ease;
}

.score:hover {
  transform: scale(1.06);
  color: var(--c-gold);
}

.score--gold {
  color: var(--c-gold);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 24px;
  padding: 2px 8px;
  border: 1px solid var(--c-primary);
  background: rgba(211, 47, 47, 0.08);
  color: var(--c-primary);
  font-family: var(--font-heading);
  font-weight: 500;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.tag--gold {
  border-color: var(--c-gold);
  color: var(--c-gold);
  background: rgba(255, 193, 7, 0.06);
}

.timeline {
  display: grid;
}

.timeline__item {
  position: relative;
  padding: 0 0 28px 26px;
  border-left: 1px solid var(--c-line);
}

.timeline__item::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 5px;
  width: 9px;
  height: 9px;
  background: var(--c-primary);
  border: 2px solid var(--c-black);
  transform: rotate(45deg);
}

.timeline__time {
  display: block;
  font-family: var(--font-number);
  font-size: 0.85rem;
  color: var(--c-gold);
  letter-spacing: 0.08em;
}

.timeline__title {
  margin: 4px 0 6px;
  font-size: 1.4rem;
  line-height: 1.2;
}

.timeline__text {
  max-width: 52ch;
  margin: 0;
  color: var(--c-gray-light);
}

@media (min-width: 992px) {
  body {
    padding-top: 0;
    padding-left: var(--rail-w);
  }

  .site-header {
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    width: var(--rail-w);
    height: 100vh;
    padding: 24px 18px;
    border-bottom: 0;
    border-right: 1px solid var(--c-line);
  }

  .site-header::after {
    top: 0;
    right: 0;
    width: 100%;
    height: 3px;
  }

  .brand {
    margin-bottom: 28px;
  }

  .nav-toggle {
    display: none;
  }

  .site-nav {
    position: static;
    display: block;
    padding: 0;
    background: transparent;
    border: 0;
    box-shadow: none;
    opacity: 1;
    visibility: visible;
    transform: none;
    pointer-events: auto;
  }

  .nav-list {
    gap: 4px;
  }

  .header__cta {
    width: 100%;
    margin-top: auto;
    margin-left: 0;
  }
}

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

  .footer__brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 560px) {
  .footer__grid {
    grid-template-columns: 1fr;
  }

  .footer__brand {
    grid-column: auto;
  }
}

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

  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }

  .score:hover,
  .nav-list__link:hover {
    transform: none;
  }
}