:root {
  --primary: #46d9ff;
  --primary-dark: #0c8bb4;
  --accent: #ff4f73;
  --mint: #a9ffcb;
  --gold: #f2c661;
  --bg: #f3f7fb;
  --panel: #ffffff;
  --panel-strong: #edf4fa;
  --text: #111827;
  --muted: #667085;
  --line: #d7e2ed;
  --shadow: 0 16px 42px rgba(25, 42, 70, 0.12);
  --radius: 8px;
  font-family: "Microsoft YaHei", "PingFang SC", system-ui, sans-serif;
}

[data-theme="dark"] {
  --bg: #080d12;
  --panel: #101820;
  --panel-strong: #162430;
  --text: #eef7fb;
  --muted: #9fb4c2;
  --line: rgba(115, 211, 255, 0.18);
  --shadow: 0 20px 60px rgba(0, 0, 0, 0.38);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    linear-gradient(90deg, rgba(70, 217, 255, 0.03) 1px, transparent 1px),
    linear-gradient(180deg, rgba(70, 217, 255, 0.03) 1px, transparent 1px),
    var(--bg);
  background-size: 46px 46px;
  color: var(--text);
  font-size: 14px;
}

button,
a {
  font: inherit;
}

a {
  color: var(--primary-dark);
  text-decoration: none;
}

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

.site {
  min-height: 100vh;
}

.hero {
  position: relative;
  overflow: hidden;
  background:
    linear-gradient(120deg, rgba(70, 217, 255, 0.16), transparent 35%),
    linear-gradient(280deg, rgba(255, 79, 115, 0.14), transparent 42%),
    #081019;
}

.hero::before,
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.hero::before {
  background:
    linear-gradient(115deg, transparent 0 28%, rgba(255, 255, 255, 0.08) 28.2% 28.7%, transparent 29% 100%),
    linear-gradient(155deg, transparent 0 62%, rgba(70, 217, 255, 0.16) 62.2% 62.8%, transparent 63% 100%);
}

.hero::after {
  opacity: 0.52;
  background-image: url("./assets/xuejin-logo.jpg");
  background-size: 420px;
  background-position: right 4% center;
  background-repeat: no-repeat;
  filter: saturate(0.8) contrast(1.1);
}

.carousel {
  position: relative;
  height: 300px;
  max-width: 1360px;
  margin: 0 auto;
  overflow: hidden;
}

.carousel-stage {
  height: 100%;
  position: relative;
  z-index: 1;
}

.slide {
  position: absolute;
  inset: 0;
  display: grid;
  align-items: center;
  opacity: 0;
  transition: opacity 0.45s ease;
}

.slide.active {
  opacity: 1;
}

.hero-card {
  width: min(740px, calc(100% - 120px));
  margin-left: 56px;
  display: grid;
  grid-template-columns: 116px 1fr;
  gap: 24px;
  align-items: center;
}

.hero-mark {
  width: 116px;
  height: 116px;
  padding: 8px;
  border: 1px solid rgba(180, 235, 255, 0.42);
  border-radius: 8px;
  background: rgba(2, 10, 18, 0.68);
  box-shadow: 0 0 34px rgba(70, 217, 255, 0.22);
}

.hero-mark img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 6px;
}

.hero-copy {
  min-width: 0;
}

.hero-copy span {
  display: block;
  margin-bottom: 10px;
  color: var(--primary);
  font-weight: 800;
  letter-spacing: 2px;
}

.hero-copy strong {
  display: block;
  color: #fff;
  font-size: 44px;
  line-height: 1;
}

.hero-copy p {
  max-width: 560px;
  margin: 14px 0 0;
  color: rgba(238, 247, 251, 0.78);
  line-height: 1.8;
}

.hero-chip {
  grid-column: 2;
  width: max-content;
  padding: 7px 14px;
  border: 1px solid rgba(70, 217, 255, 0.4);
  border-radius: 4px;
  background: rgba(70, 217, 255, 0.1);
  color: #d9f8ff;
  font-weight: 800;
}

.carousel-btn {
  position: absolute;
  top: 50%;
  z-index: 4;
  width: 38px;
  height: 38px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.34);
  color: #fff;
  font-size: 24px;
  line-height: 1;
  cursor: pointer;
  transform: translateY(-50%);
}

.carousel-btn:hover {
  background: rgba(70, 217, 255, 0.24);
}

.carousel-btn.prev {
  left: 12px;
}

.carousel-btn.next {
  right: 12px;
}

.carousel-dots {
  position: absolute;
  left: 50%;
  bottom: 18px;
  z-index: 4;
  display: flex;
  gap: 9px;
  transform: translateX(-50%);
}

.dot {
  width: 24px;
  height: 4px;
  border: 0;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.34);
  cursor: pointer;
}

.dot.active {
  background: var(--primary);
}

.brand {
  max-width: 1360px;
  min-height: 116px;
  margin: 0 auto;
  padding: 0 12px 22px;
  display: flex;
  align-items: flex-end;
  gap: 18px;
  transform: translateY(-26px);
}

.brand-logo {
  width: 118px;
  height: 118px;
  border: 3px solid rgba(255, 255, 255, 0.88);
  border-radius: 8px;
  background: var(--panel);
  object-fit: cover;
  box-shadow: var(--shadow);
}

.brand-copy {
  padding: 0 0 13px;
}

.brand h1 {
  margin: 0;
  font-size: 30px;
  line-height: 1.15;
  letter-spacing: 1px;
}

.brand p {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 15px;
}

.tabs {
  position: sticky;
  top: 0;
  z-index: 20;
  margin-top: -26px;
  background: color-mix(in srgb, var(--panel) 92%, transparent);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 8px 26px rgba(0, 0, 0, 0.12);
  backdrop-filter: blur(14px);
}

.tabs-scroll {
  max-width: 1360px;
  margin: 0 auto;
  padding: 0 118px 0 12px;
  display: flex;
  overflow-x: auto;
  scrollbar-width: none;
}

.tabs-scroll::-webkit-scrollbar {
  display: none;
}

.tab-btn {
  min-height: 54px;
  padding: 0 20px;
  border: 0;
  border-bottom: 2px solid transparent;
  background: transparent;
  color: var(--muted);
  font-weight: 800;
  white-space: nowrap;
  cursor: pointer;
}

.tab-btn:hover,
.tab-btn.active {
  color: var(--primary-dark);
}

[data-theme="dark"] .tab-btn:hover,
[data-theme="dark"] .tab-btn.active {
  color: var(--primary);
}

.tab-btn.active {
  border-bottom-color: var(--primary);
}

.theme-toggle {
  position: absolute;
  top: 50%;
  right: 24px;
  height: 36px;
  padding: 0 13px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--panel);
  color: var(--muted);
  cursor: pointer;
  transform: translateY(-50%);
}

.content {
  max-width: 1360px;
  margin: 0 auto;
  padding: 22px 12px;
  min-height: 430px;
}

.ann-row {
  min-height: 224px;
  padding: 22px;
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 24px;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(120deg, color-mix(in srgb, var(--primary) 12%, transparent), transparent 60%),
    var(--panel);
  cursor: pointer;
}

.ann-row:hover,
.trial-card:hover,
.right-card:hover,
.sound-card:hover,
.price-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow);
}

.brand-tile {
  position: relative;
  height: 164px;
  border-radius: 8px;
  overflow: hidden;
  background:
    linear-gradient(135deg, rgba(70, 217, 255, 0.22), rgba(255, 79, 115, 0.12)),
    #071018;
}

.brand-tile img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.82;
}

.ann-meta {
  display: flex;
  gap: 9px;
  align-items: center;
  color: var(--muted);
  font-size: 12px;
}

.badge {
  display: inline-flex;
  align-items: center;
  height: 22px;
  padding: 0 8px;
  border-radius: 4px;
  background: var(--accent);
  color: #fff;
  font-size: 12px;
  font-weight: 800;
}

.badge.ice {
  background: rgba(70, 217, 255, 0.16);
  color: var(--primary-dark);
  border: 1px solid rgba(70, 217, 255, 0.35);
}

[data-theme="dark"] .badge.ice {
  color: #c9f6ff;
}

.ann-title {
  margin: 12px 0 10px;
  font-size: 26px;
  font-weight: 900;
}

.ann-summary {
  margin: 0;
  color: var(--muted);
  line-height: 1.9;
}

.price-layout {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 20px;
  align-items: start;
}

.side-nav {
  position: sticky;
  top: 78px;
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
}

.side-btn {
  width: 100%;
  min-height: 52px;
  padding: 0 14px;
  display: flex;
  align-items: center;
  gap: 10px;
  border: 1px solid transparent;
  border-radius: 6px;
  background: transparent;
  color: var(--muted);
  font-weight: 900;
  text-align: left;
  cursor: pointer;
}

.side-btn.active {
  border-color: rgba(70, 217, 255, 0.38);
  background: color-mix(in srgb, var(--primary) 12%, transparent);
  color: var(--primary-dark);
}

[data-theme="dark"] .side-btn.active {
  color: var(--primary);
}

.side-dot {
  width: 7px;
  height: 18px;
  border-radius: 999px;
  background: currentColor;
}

.section-head {
  margin-bottom: 16px;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
}

.section-head span {
  display: block;
  font-size: 22px;
  font-weight: 900;
}

.section-head p {
  margin: 6px 0 0;
  color: var(--muted);
}

.price-grid,
.sound-grid,
.trial-grid,
.right-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.price-card,
.trial-card,
.sound-card,
.about-box,
.right-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  overflow: hidden;
  transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
}

.price-card:hover,
.trial-card:hover,
.right-card:hover,
.sound-card:hover {
  border-color: rgba(70, 217, 255, 0.46);
}

.price-art {
  height: 116px;
  padding: 18px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background:
    linear-gradient(135deg, rgba(70, 217, 255, 0.2), transparent 56%),
    linear-gradient(315deg, rgba(255, 79, 115, 0.18), transparent 50%),
    var(--panel-strong);
}

.price-art span {
  width: max-content;
  padding: 4px 8px;
  border: 1px solid rgba(70, 217, 255, 0.32);
  border-radius: 4px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
}

.price-art strong {
  color: var(--text);
  font-size: 20px;
  line-height: 1.25;
}

.price-head {
  min-height: 66px;
  padding: 16px 18px;
  display: flex;
  align-items: center;
  gap: 8px;
  border-top: 1px solid var(--line);
}

.price-name {
  font-size: 18px;
  font-weight: 900;
}

.price-body {
  padding: 0 18px 18px;
}

.price-money {
  color: var(--gold);
  font-size: 20px;
  font-weight: 900;
}

.price-money span {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-size: 13px;
}

.tag-row {
  margin-top: 12px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.tag-row span {
  padding: 4px 8px;
  border: 1px solid var(--line);
  border-radius: 4px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.note {
  margin-top: 14px;
  padding: 12px;
  border: 1px solid rgba(70, 217, 255, 0.26);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--primary) 7%, transparent);
  color: var(--muted);
  line-height: 1.7;
}

.note-title {
  margin-bottom: 5px;
  color: var(--primary-dark);
  font-weight: 900;
}

[data-theme="dark"] .note-title {
  color: var(--primary);
}

.sound-tabs {
  margin-bottom: 18px;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.pill {
  min-height: 38px;
  padding: 0 18px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--panel);
  color: var(--muted);
  cursor: pointer;
  font-weight: 800;
}

.pill.active {
  border-color: rgba(70, 217, 255, 0.44);
  background: color-mix(in srgb, var(--primary) 14%, transparent);
  color: var(--primary-dark);
}

[data-theme="dark"] .pill.active {
  color: var(--primary);
}

.sound-card,
.trial-card,
.right-card {
  cursor: pointer;
}

.sound-cover,
.trial-cover {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--panel-strong);
}

.placeholder-cover {
  display: grid;
  place-items: center;
}

.placeholder-cover img {
  width: 62%;
  height: 62%;
  object-fit: cover;
  border-radius: 6px;
  opacity: 0.78;
}

.recommend {
  position: absolute;
  left: 10px;
  top: 10px;
  padding: 4px 8px;
  border-radius: 4px;
  background: var(--accent);
  color: #fff;
  font-size: 12px;
  font-weight: 900;
}

.sound-body,
.trial-body {
  padding: 16px 18px 18px;
}

.sound-body p {
  margin: 8px 0 0;
  color: var(--muted);
}

.sound-name,
.trial-name {
  font-size: 18px;
  font-weight: 900;
}

.gender {
  display: inline-grid;
  place-items: center;
  width: 22px;
  height: 22px;
  margin-right: 7px;
  border-radius: 4px;
  background: color-mix(in srgb, var(--accent) 18%, transparent);
  color: var(--accent);
  font-size: 13px;
}

.game-placeholder {
  display: grid;
  place-items: center;
  padding: 18px;
  background:
    linear-gradient(135deg, rgba(70, 217, 255, 0.2), transparent 60%),
    var(--panel-strong);
}

.game-placeholder span {
  color: var(--text);
  font-size: 20px;
  font-weight: 900;
  text-align: center;
}

.trial-card.disabled .trial-cover::after {
  content: "待填充";
  position: absolute;
  right: 12px;
  bottom: 12px;
  padding: 6px 10px;
  border-radius: 4px;
  background: rgba(70, 217, 255, 0.16);
  color: var(--primary-dark);
  font-weight: 900;
}

[data-theme="dark"] .trial-card.disabled .trial-cover::after {
  color: var(--primary);
}

.trial-desc {
  margin-top: 8px;
  color: var(--muted);
  line-height: 1.6;
}

.right-placeholder {
  min-height: 220px;
  padding: 22px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background:
    linear-gradient(135deg, rgba(70, 217, 255, 0.16), transparent 55%),
    linear-gradient(315deg, rgba(255, 79, 115, 0.12), transparent 45%),
    var(--panel-strong);
}

.right-placeholder span {
  color: var(--primary-dark);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 2px;
}

[data-theme="dark"] .right-placeholder span {
  color: var(--primary);
}

.right-placeholder strong {
  color: var(--text);
  font-size: 22px;
  line-height: 1.35;
}

.about-box {
  padding: 38px 34px;
  white-space: pre-line;
  line-height: 2;
}

.contact {
  max-width: 1360px;
  margin: 0 auto;
  padding: 26px 32px;
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  color: var(--muted);
}

.contact-item {
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--panel);
}

.footer {
  padding: 22px 12px;
  text-align: center;
  color: var(--muted);
}

.modal[hidden] {
  display: none;
}

.modal {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: grid;
  place-items: center;
  padding: 30px 16px;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.74);
}

.modal-panel {
  position: relative;
  z-index: 1;
  width: min(760px, 96vw);
  max-height: 90vh;
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.38);
}

.modal-close {
  position: sticky;
  top: 8px;
  left: calc(100% - 48px);
  z-index: 2;
  width: 38px;
  height: 38px;
  margin: 8px 8px -46px auto;
  display: grid;
  place-items: center;
  border: 0;
  border-radius: 4px;
  background: rgba(0, 0, 0, 0.42);
  color: #fff;
  font-size: 24px;
  cursor: pointer;
}

.modal-inner {
  padding: 32px;
}

.modal-inner h2 {
  margin: 0 0 18px;
}

.modal-inner p {
  margin: 0 0 12px;
  color: var(--muted);
  line-height: 1.85;
}

.strong-line {
  color: var(--primary-dark) !important;
  font-size: 17px;
  font-weight: 900;
}

[data-theme="dark"] .strong-line {
  color: var(--primary) !important;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 24px;
  z-index: 120;
  max-width: min(520px, calc(100vw - 32px));
  padding: 12px 18px;
  border-radius: 4px;
  background: rgba(9, 16, 24, 0.94);
  color: #fff;
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, 12px);
  transition: 0.2s ease;
}

.toast.show {
  opacity: 1;
  transform: translate(-50%, 0);
}

@media (max-width: 1120px) {
  .price-grid,
  .sound-grid,
  .trial-grid,
  .right-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 860px) {
  .price-grid,
  .sound-grid,
  .trial-grid,
  .right-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .hero-card {
    width: calc(100% - 92px);
    margin-left: 46px;
    grid-template-columns: 90px 1fr;
  }

  .hero-mark {
    width: 90px;
    height: 90px;
  }

  .hero-copy strong {
    font-size: 34px;
  }
}

@media (max-width: 720px) {
  .carousel {
    height: 230px;
  }

  .hero::after {
    background-size: 280px;
    opacity: 0.34;
  }

  .hero-card {
    width: calc(100% - 76px);
    margin-left: 38px;
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .hero-mark {
    display: none;
  }

  .hero-copy strong {
    font-size: 32px;
  }

  .hero-copy p {
    margin-top: 10px;
  }

  .hero-chip {
    grid-column: 1;
  }

  .brand {
    min-height: 94px;
    align-items: center;
    gap: 14px;
  }

  .brand-logo {
    width: 84px;
    height: 84px;
  }

  .brand h1 {
    font-size: 23px;
  }

  .tabs-scroll {
    padding-right: 112px;
  }

  .tab-btn {
    padding: 0 14px;
    font-size: 13px;
  }

  .theme-toggle {
    right: 10px;
    padding: 0 10px;
  }

  .ann-row {
    grid-template-columns: 1fr;
  }

  .price-layout {
    grid-template-columns: 1fr;
  }

  .side-nav {
    position: static;
    display: flex;
    gap: 8px;
    overflow-x: auto;
  }

  .side-btn {
    width: auto;
    min-width: 116px;
  }
}

@media (max-width: 560px) {
  .price-grid,
  .sound-grid,
  .trial-grid,
  .right-grid {
    grid-template-columns: 1fr;
  }

  .brand {
    transform: translateY(-18px);
  }

  .tabs {
    margin-top: -18px;
  }

  .contact {
    padding: 18px 24px;
    gap: 8px;
  }
}