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

:root {
  --page-base: #0d0f12;
  --sun-block: #ff8c42;
  --forest-block: #1e5a53;
  --midnight-block: #1b2b4a;
  --card-yellow: #ffd700;
  --card-cyan: #00bfff;
  --card-lavender: #b57edc;
  --accent-red: #ff2e4d;
  --accent-neon: #39ff14;
  --status-update: #ff8c42;
  --status-recommend: #e040fb;
  --status-new: #00e5ff;
  --text-main: #f5f5f5;
  --text-inverse: #101010;
  --border-light: rgba(255,255,255,0.2);
  --border-dark: rgba(0,0,0,0.3);

  --font-heading: "Noto Sans SC Black", "Heiti SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;

  --container-max: 1440px;
  --container-pad: clamp(16px, 4vw, 48px);

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 16px;
  --space-4: 24px;
  --space-5: 40px;
  --space-6: 64px;
  --space-7: 96px;

  --radius-sm: 4px;
  --radius-md: 10px;
  --radius-lg: 16px;

  --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.4);

  --font-xs: 12px;
  --font-sm: 14px;
  --font-md: 16px;
  --font-lg: 20px;
  --font-xl: 28px;
  --font-2xl: 40px;
}

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

body {
  font-family: var(--font-body);
  font-size: var(--font-md);
  line-height: 1.65;
  color: var(--text-main);
  background: var(--page-base);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

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

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

ul, ol {
  list-style: none;
}

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

input, select, textarea {
  font: inherit;
  color: inherit;
}

:focus-visible {
  outline: 2px solid var(--accent-neon);
  outline-offset: 2px;
}

h1, h2, h3, h4, .site-brand__name, .site-footer__logo-name {
  font-family: var(--font-heading);
  line-height: 1.2;
  letter-spacing: 0.01em;
}

h1 {
  font-size: clamp(32px, 6vw, 72px);
}

h2 {
  font-size: clamp(26px, 4vw, 52px);
}

h3 {
  font-size: clamp(20px, 2.5vw, 30px);
}

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

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 1000;
  padding: 10px 20px;
  background: var(--accent-neon);
  color: var(--text-inverse);
  font-weight: 700;
  border-radius: 0 0 var(--radius-md) 0;
}

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

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0;
  background: linear-gradient(90deg, var(--accent-red), var(--accent-neon));
  z-index: 999;
  pointer-events: none;
  transition: width 0.1s linear;
}

[hidden] {
  display: none !important;
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-block;
  padding: 10px 22px;
  font-family: var(--font-heading);
  font-size: var(--font-sm);
  font-weight: 700;
  text-align: center;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn--primary {
  background: var(--accent-red);
  color: #fff;
  box-shadow: 0 4px 14px rgba(255, 46, 77, 0.35);
}

.btn--outline {
  border-color: var(--border-light);
  background: transparent;
  color: var(--text-main);
}

.btn--outline:hover {
  background: rgba(255,255,255,0.08);
}

.btn--ghost {
  background: rgba(255,255,255,0.08);
  color: var(--text-main);
}

.btn--ghost:hover {
  background: rgba(255,255,255,0.14);
}

/* ---------- Breadcrumb ---------- */

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  font-size: var(--font-sm);
  color: rgba(255,255,255,0.6);
  padding-block: var(--space-3);
}

.breadcrumb a {
  color: var(--card-cyan);
}

.breadcrumb a:hover {
  text-decoration: underline;
}

.breadcrumb__sep {
  color: rgba(255,255,255,0.3);
}

/* ---------- Header ---------- */

.site-header {
  background: var(--page-base);
  color: var(--text-main);
  position: relative;
  z-index: 100;
}

.site-header__inner {
  padding-top: var(--space-3);
}

.site-masthead {
  display: flex;
  flex-direction: column;
  align-items: center;
  border-bottom: 3px double var(--border-light);
  padding-bottom: var(--space-3);
}

.site-masthead__meta {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--font-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.55);
}

.site-masthead__dateline::before {
  content: "";
  display: inline-block;
  width: 8px;
  height: 8px;
  margin-right: 6px;
  background: var(--accent-neon);
  border-radius: 1px;
  vertical-align: baseline;
}

.site-masthead__stat {
  color: var(--card-yellow);
}

.site-brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-3) 0 var(--space-2);
}

.site-brand__num {
  font-family: var(--font-heading);
  font-size: clamp(32px, 5vw, 60px);
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--accent-neon);
  user-select: none;
}

.site-brand__num--right {
  color: var(--accent-red);
}

.site-brand__core {
  text-align: center;
  display: flex;
  flex-direction: column;
}

.site-brand__name {
  font-size: clamp(30px, 5vw, 68px);
  font-weight: 900;
  letter-spacing: 0.08em;
  color: var(--text-main);
  white-space: nowrap;
}

.site-brand__sub {
  font-size: clamp(10px, 1.2vw, 13px);
  letter-spacing: 0.32em;
  color: var(--card-cyan);
  text-transform: uppercase;
  margin-top: 4px;
}

.site-nav-panel {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  border-bottom: 1px solid var(--border-light);
  padding: var(--space-1) 0;
}

.site-nav__list {
  display: flex;
  gap: clamp(6px, 1.5vw, 28px);
  flex-wrap: wrap;
  justify-content: center;
}

.site-nav__link {
  display: block;
  padding: 8px 12px;
  font-size: var(--font-sm);
  font-weight: 700;
  letter-spacing: 0.06em;
  color: rgba(255,255,255,0.78);
  border-bottom: 2px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.site-nav__link:hover {
  color: var(--card-yellow);
  border-bottom-color: var(--card-yellow);
}

.site-nav__link[aria-current="page"] {
  color: var(--accent-neon);
  border-bottom-color: var(--accent-neon);
}

.site-nav-toggle {
  display: none;
}

/* ---------- Mobile Navigation ---------- */

@media (max-width: 767px) {
  .site-nav-panel {
    flex-wrap: wrap;
    justify-content: space-between;
    padding: var(--space-2) 0;
  }

  .site-nav-toggle {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 10px;
    color: var(--text-main);
    font-weight: 700;
    font-size: var(--font-sm);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-sm);
  }

  .site-nav-toggle__bars {
    display: inline-flex;
    flex-direction: column;
    gap: 4px;
  }

  .site-nav-toggle__bar {
    width: 20px;
    height: 2px;
    background: var(--text-main);
    border-radius: 1px;
    transition: transform 0.2s ease, opacity 0.2s ease;
  }

  .site-nav-toggle.is-active .site-nav-toggle__bar:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
  }

  .site-nav-toggle.is-active .site-nav-toggle__bar:nth-child(2) {
    opacity: 0;
  }

  .site-nav-toggle.is-active .site-nav-toggle__bar:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
  }

  .site-nav {
    width: 100%;
    display: none;
  }

  .site-nav[data-open="true"] {
    display: block;
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding-top: var(--space-2);
  }

  .site-nav__item {
    border-bottom: 1px solid var(--border-light);
  }

  .site-nav__item:last-child {
    border-bottom: none;
  }

  .site-nav__link {
    padding: 14px 16px;
    font-size: var(--font-md);
    text-align: center;
    border-inline: 3px solid transparent;
  }

  .site-nav__link[aria-current="page"] {
    border-bottom-color: transparent;
    border-inline-color: var(--accent-neon);
  }
}

/* ---------- Footer ---------- */

.site-footer {
  background: var(--sun-block);
  color: var(--text-inverse);
  margin-top: var(--space-7);
}

.site-footer__inner {
  padding-top: var(--space-6);
}

.site-footer__top {
  display: grid;
  grid-template-columns: 1.4fr 2.6fr;
  gap: var(--space-6);
  padding-bottom: var(--space-5);
}

.site-footer__logo {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.site-footer__logo-num {
  font-family: var(--font-heading);
  font-size: 38px;
  font-weight: 900;
  line-height: 1;
  background: var(--page-base);
  color: var(--accent-neon);
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  letter-spacing: -0.02em;
}

.site-footer__logo-name {
  font-size: 28px;
  font-weight: 900;
  color: var(--text-inverse);
}

.site-footer__tagline {
  margin-top: var(--space-3);
  font-size: var(--font-sm);
  color: rgba(0,0,0,0.7);
  letter-spacing: 0.04em;
}

.site-footer__cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-5);
}

.site-footer__heading {
  font-size: var(--font-xs);
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: rgba(0,0,0,0.6);
  border-bottom: 2px solid rgba(0,0,0,0.2);
  padding-bottom: 6px;
  margin-bottom: var(--space-3);
}

.site-footer__links {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.site-footer__links a {
  color: var(--text-inverse);
  font-size: var(--font-sm);
  font-weight: 500;
  padding: 3px 0;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease, padding-left 0.2s ease;
}

.site-footer__links a:hover {
  border-bottom-color: var(--text-inverse);
  padding-left: 4px;
}

.site-footer__links li {
  font-size: var(--font-sm);
  color: rgba(0,0,0,0.8);
  line-height: 1.7;
}

.site-footer__bottom {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-2);
  padding-top: var(--space-4);
  padding-bottom: var(--space-5);
  border-top: 1px solid var(--border-dark);
  font-size: var(--font-sm);
  color: rgba(0,0,0,0.7);
}

/* ---------- Card Grid & Cards ---------- */

.grid-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
}

.grid-cards__item {
  min-width: 0;
}

.card {
  position: relative;
  background: var(--midnight-block);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: var(--space-3);
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  height: 100%;
  display: flex;
  flex-direction: column;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.card--yellow {
  background: var(--card-yellow);
  color: var(--text-inverse);
}

.card--cyan {
  background: var(--card-cyan);
  color: var(--text-inverse);
}

.card--lavender {
  background: var(--card-lavender);
  color: var(--text-inverse);
}

.card__media {
  margin: calc(-1 * var(--space-3)) calc(-1 * var(--space-3)) var(--space-3);
  border-radius: var(--radius-md) var(--radius-md) 0 0;
  overflow: hidden;
}

.card__body {
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1;
}

.card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: auto;
  padding-top: var(--space-2);
}

/* ---------- Tile Matrix ---------- */

.tile-matrix {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
  gap: 14px;
}

.tile-matrix__tile {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 120px;
  padding: var(--space-4) var(--space-3);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.tile-matrix__tile:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.tile-matrix__tile--sun {
  background: var(--sun-block);
  color: var(--text-inverse);
}

.tile-matrix__tile--forest {
  background: var(--forest-block);
  color: #ffffff;
}

.tile-matrix__tile--midnight {
  background: var(--midnight-block);
  color: var(--text-main);
}

.tile-matrix__tile__count {
  font-size: var(--font-xs);
  font-weight: 700;
  opacity: 0.8;
}

/* ---------- List Rows ---------- */

.list-rows {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--border-light);
}

.list-row {
  display: grid;
  grid-template-columns: 48px 1fr auto;
  align-items: center;
  gap: var(--space-3);
  padding: 12px 0;
  border-bottom: 1px solid var(--border-light);
  transition: background 0.2s ease;
}

.list-row:hover {
  background: rgba(255,255,255,0.04);
}

.list-row__body {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.list-row__title {
  font-family: var(--font-heading);
  font-size: var(--font-md);
  font-weight: 700;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.list-row__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.list-row__meta .badge,
.list-row__meta .tag-pill {
  font-size: 11px;
}

/* ---------- Tag Cluster ---------- */

.tag-cluster {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag-pill {
  display: inline-block;
  padding: 4px 12px;
  font-size: var(--font-xs);
  font-weight: 700;
  border-radius: 999px;
  background: rgba(255,255,255,0.1);
  color: var(--text-main);
  border: 1px solid var(--border-light);
  transition: background 0.2s ease, transform 0.2s ease;
}

.tag-pill:hover {
  transform: translateY(-1px);
}

.tag-pill--yellow {
  background: var(--card-yellow);
  color: var(--text-inverse);
  border-color: transparent;
}

.tag-pill--cyan {
  background: var(--card-cyan);
  color: var(--text-inverse);
  border-color: transparent;
}

.tag-pill--lavender {
  background: var(--card-lavender);
  color: var(--text-inverse);
  border-color: transparent;
}

/* ---------- Badges ---------- */

.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  font-size: var(--font-xs);
  font-weight: 700;
  border-radius: var(--radius-sm);
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.badge::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
  opacity: 0.7;
}

.badge--update {
  background: var(--status-update);
  color: var(--text-inverse);
}

.badge--recommend {
  background: var(--status-recommend);
  color: #ffffff;
}

.badge--new {
  background: var(--status-new);
  color: var(--text-inverse);
}

/* ---------- Sequence Number ---------- */

.seq-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  font-family: var(--font-heading);
  font-size: var(--font-lg);
  font-weight: 900;
  color: var(--card-yellow);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.04);
}

.seq-num--top {
  color: var(--accent-red);
  border-color: var(--accent-red);
}

/* ---------- Meter Bar ---------- */

.meter-bar {
  height: 6px;
  background: rgba(255,255,255,0.12);
  border-radius: 3px;
  overflow: hidden;
}

.meter-bar__fill {
  height: 100%;
  background: var(--accent-neon);
  border-radius: 3px;
  transition: width 0.3s ease;
}

/* ---------- Index Strip ---------- */

.index-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  padding: var(--space-2);
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
}

.index-strip__item {
  padding: 4px 10px;
  font-size: var(--font-xs);
  font-weight: 700;
  border-radius: var(--radius-sm);
  color: rgba(255,255,255,0.7);
  transition: background 0.2s ease, color 0.2s ease;
}

.index-strip__item:hover {
  background: rgba(255,255,255,0.1);
  color: var(--text-main);
}

.index-strip__item--active {
  background: var(--accent-red);
  color: #ffffff;
}

/* ---------- Horizontal Track ---------- */

.track-wrap {
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding-bottom: 6px;
}

.track-wrap::-webkit-scrollbar {
  height: 6px;
}

.track-wrap::-webkit-scrollbar-thumb {
  background: rgba(255,255,255,0.25);
  border-radius: 3px;
}

.track-wrap__inner {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(200px, 280px);
  gap: 14px;
}

.track-wrap__inner > * {
  scroll-snap-align: start;
}

/* ---------- Compare Table ---------- */

.compare-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--font-sm);
  background: rgba(255,255,255,0.02);
}

.compare-table th,
.compare-table td {
  padding: 10px 14px;
  border: 1px solid var(--border-light);
  text-align: left;
  vertical-align: top;
}

.compare-table th {
  background: rgba(255,255,255,0.08);
  font-family: var(--font-heading);
  font-weight: 700;
}

.compare-table tr:hover td {
  background: rgba(255,255,255,0.04);
}

/* ---------- Section Number Heading ---------- */

.section-num {
  display: flex;
  align-items: baseline;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.section-num__num {
  font-family: var(--font-heading);
  font-size: clamp(44px, 7vw, 80px);
  font-weight: 900;
  line-height: 0.8;
  color: var(--accent-red);
  letter-spacing: -0.04em;
}

.section-num__label {
  font-family: var(--font-heading);
  font-size: clamp(20px, 3vw, 32px);
  font-weight: 700;
  color: var(--text-main);
}

/* ---------- Tabs ---------- */

.tabs {
  display: flex;
  gap: 4px;
  border-bottom: 1px solid var(--border-light);
  flex-wrap: wrap;
}

.tabs__btn {
  padding: 8px 16px;
  font-size: var(--font-sm);
  font-weight: 700;
  color: rgba(255,255,255,0.6);
  border-bottom: 2px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.tabs__btn:hover {
  color: var(--text-main);
}

.tabs__btn.is-active {
  color: var(--accent-neon);
  border-bottom-color: var(--accent-neon);
}

.tab-panel {
  padding-top: var(--space-3);
}

/* ---------- Media Frames ---------- */

.media-frame {
  position: relative;
  aspect-ratio: 16 / 9;
  background: linear-gradient(135deg, rgba(255,255,255,0.1), rgba(255,255,255,0.02));
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

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

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

.media-frame::after {
  content: "IMG";
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-size: var(--font-xs);
  font-weight: 700;
  letter-spacing: 0.2em;
  color: rgba(255,255,255,0.35);
}

/* ---------- Responsive ---------- */

@media (max-width: 1023px) {
  .site-footer__top {
    grid-template-columns: 1fr;
    gap: var(--space-5);
  }

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

@media (max-width: 639px) {
  .site-footer__top {
    gap: var(--space-4);
  }

  .site-footer__cols {
    grid-template-columns: 1fr 1fr;
  }

  .site-footer__links li {
    font-size: var(--font-xs);
  }

  .list-row {
    grid-template-columns: 36px 1fr;
  }

  .list-row__meta {
    grid-column: 2;
  }
}

@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;
  }

  .card:hover,
  .tile-matrix__tile:hover,
  .btn:hover {
    transform: none;
  }

  .scroll-progress {
    transition: none;
  }
}

/* ---------- Prose ---------- */

.prose {
  max-width: 68ch;
  line-height: 1.8;
  color: rgba(255,255,255,0.82);
}

.prose p {
  margin-bottom: var(--space-3);
}

.prose ul {
  list-style: square;
  padding-left: 1.4em;
  margin-bottom: var(--space-3);
}

.prose a {
  color: var(--card-cyan);
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* ---------- Section Band ---------- */

.band {
  border-radius: var(--radius-lg);
  padding: var(--space-5) var(--space-4);
  margin-bottom: var(--space-5);
}

.band--sun {
  background: var(--sun-block);
  color: var(--text-inverse);
}

.band--forest {
  background: var(--forest-block);
  color: #ffffff;
}

.band--midnight {
  background: var(--midnight-block);
  color: var(--text-main);
}