:root {
  color-scheme: light;
  --club-blue: #2e4094;
  --club-blue-strong: #1f2b6e;
  --club-green: #6d9f32;
  --club-gold: #b58a42;
  --surface: #ffffff;
  --surface-subtle: #f5f7fb;
  --surface-muted: #e9edf5;
  --text: #171a25;
  --text-muted: #565e70;
  --border: #d8deea;
  --border-strong: #bcc5d6;
  --danger: #b42318;
  --success: #357a21;
  --warning-bg: #fff8e8;
  --warning-border: #d7ae62;
  --shadow: 0 10px 30px rgba(31, 43, 110, 0.09);
  --header-bg: rgba(255, 255, 255, 0.94);
  --footer-bg: #11182f;
  --footer-text: #d7dcec;
  --ease-out: cubic-bezier(0.23, 1, 0.32, 1);
  --ease-in-out: cubic-bezier(0.77, 0, 0.175, 1);
}

[data-theme="dark"] {
  color-scheme: dark;
  --club-blue: #91a3ff;
  --club-blue-strong: #b1beff;
  --club-green: #91c854;
  --club-gold: #d8b56f;
  --surface: #171b29;
  --surface-subtle: #10131d;
  --surface-muted: #222838;
  --text: #f0f2f8;
  --text-muted: #b7bdcc;
  --border: #30384c;
  --border-strong: #45506a;
  --danger: #ff8a80;
  --success: #a2d77b;
  --warning-bg: #2b2518;
  --warning-border: #8f7138;
  --shadow: 0 12px 32px rgba(0, 0, 0, 0.28);
  --header-bg: rgba(16, 19, 29, 0.94);
  --footer-bg: #090c14;
  --footer-text: #bcc3d4;
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  margin: 0;
  background: var(--surface-subtle);
  color: var(--text);
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  letter-spacing: 0;
  transition: background-color 180ms ease, color 180ms ease;
}

button,
input,
textarea,
select {
  font: inherit;
  letter-spacing: 0;
}

a {
  color: var(--club-blue);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--club-green) 65%, transparent);
  outline-offset: 2px;
}

img {
  max-width: 100%;
}

.site-header {
  position: fixed;
  z-index: 100;
  top: 0;
  right: 0;
  left: 0;
  min-height: 72px;
  border-bottom: 1px solid var(--border);
  background: var(--header-bg);
  backdrop-filter: blur(18px);
  box-shadow: 0 2px 14px rgba(19, 27, 58, 0.05);
  transition: box-shadow 180ms ease, background-color 180ms ease;
}

.site-header.is-scrolled {
  box-shadow: 0 8px 24px rgba(19, 27, 58, 0.12);
}

.header-inner {
  display: flex;
  width: min(1440px, 100%);
  min-height: 72px;
  margin: 0 auto;
  padding: 0 28px;
  align-items: center;
  gap: 22px;
}

.brand {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 10px;
  color: var(--club-blue);
  font-size: 17px;
  font-weight: 700;
  text-decoration: none;
}

.brand img {
  width: 42px;
  height: 42px;
  border: 2px solid var(--club-blue);
  border-radius: 50%;
  background: #fff;
  object-fit: contain;
  padding: 3px;
}

.site-nav {
  display: flex;
  min-width: 0;
  flex: 1;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
}

.nav-links {
  display: flex;
  min-width: 0;
  margin: 0;
  padding: 0;
  align-items: center;
  gap: 2px;
  list-style: none;
}

.nav-link,
.nav-button {
  display: inline-flex;
  min-height: 38px;
  border: 0;
  border-radius: 6px;
  align-items: center;
  justify-content: center;
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
  padding: 7px 10px;
  text-decoration: none;
  transition: background-color 150ms ease, color 150ms ease, transform 120ms ease;
}

.nav-user {
  max-width: 180px;
  overflow: hidden;
  color: var(--text);
  font-size: 13px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.nav-auth {
  border: 1px solid transparent;
  font-weight: 700;
}

.nav-auth-account {
  border-color: var(--club-green);
  background: color-mix(in srgb, var(--club-green) 10%, var(--surface));
  color: var(--success);
}

.nav-auth-account.is-current {
  background: var(--club-green);
  color: #fff;
}

.nav-auth-logout {
  border-color: var(--club-gold);
  background: color-mix(in srgb, var(--club-gold) 18%, var(--surface));
  color: color-mix(in srgb, var(--club-gold) 72%, var(--text));
}

.nav-admin {
  border: 1px solid var(--club-blue);
  background: color-mix(in srgb, var(--club-blue) 12%, var(--surface));
  color: var(--club-blue);
  font-weight: 700;
}

.inline-form {
  display: inline-flex;
  margin: 0;
}

.theme-toggle,
.menu-toggle,
.back-to-top {
  display: inline-flex;
  width: 40px;
  height: 40px;
  flex: 0 0 40px;
  border: 1px solid var(--border);
  border-radius: 50%;
  align-items: center;
  justify-content: center;
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  transition: background-color 150ms ease, border-color 150ms ease, transform 120ms ease;
}

.menu-toggle {
  display: none;
  border-radius: 6px;
  flex-direction: column;
  gap: 4px;
}

.menu-toggle span {
  width: 20px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform 180ms var(--ease-out), opacity 150ms ease;
}

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

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

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

.site-main {
  min-height: calc(100vh - 260px);
  padding-top: 72px;
}

.home-hero {
  position: relative;
  display: grid;
  min-height: min(500px, calc(100vh - 118px));
  padding: 64px 28px;
  place-items: center;
  overflow: hidden;
  background-color: #16204f;
  background-image: var(--hero-image, none);
  background-position: center 43%;
  background-size: cover;
  color: #fff;
  text-align: center;
}

.home-hero::before {
  position: absolute;
  inset: 0;
  background: rgba(10, 15, 40, 0.7);
  content: "";
}

.hero-content {
  position: relative;
  z-index: 1;
  width: min(880px, 100%);
}

.hero-kicker {
  margin: 0 0 12px;
  color: #c7e99e;
  font-size: 16px;
  font-weight: 700;
}

.home-hero h1 {
  margin: 0;
  font-size: 48px;
  line-height: 1.25;
  letter-spacing: 0;
  text-wrap: balance;
}

.home-hero h1 span {
  display: block;
  color: #a7d66c;
}

.hero-summary {
  max-width: 720px;
  margin: 20px auto 0;
  color: #f0f3fa;
  font-size: 18px;
}

.page-shell {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  padding: 58px 0 76px;
}

.page-header {
  display: grid;
  margin-bottom: 36px;
  gap: 12px;
}

.page-header h1,
.section-heading {
  margin: 0;
  color: var(--club-blue);
  font-size: 34px;
  line-height: 1.3;
  letter-spacing: 0;
}

.page-header p,
.section-lead {
  max-width: 760px;
  margin: 0;
  color: var(--text-muted);
}

.section-block {
  margin-bottom: 72px;
}

.section-heading {
  display: inline-block;
  margin-bottom: 28px;
  border-bottom: 3px solid var(--club-green);
  padding-bottom: 8px;
}

.section-heading-row {
  display: flex;
  margin-bottom: 28px;
  align-items: center;
  justify-content: flex-start;
  gap: 14px;
}

.section-heading-row .section-heading {
  margin-bottom: 0;
}

.prose-panel {
  max-width: 880px;
  border-left: 4px solid var(--club-green);
  padding: 6px 0 6px 28px;
}

.prose-panel p {
  margin: 0;
  color: var(--text-muted);
  line-height: 1.9;
}

.content-grid,
.product-grid,
.quick-grid,
.image-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.stack-list {
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
}

.stack-list > .content-card,
.stack-list > .product-card {
  width: 100%;
  min-height: 150px;
}

.content-card,
.product-card,
.quick-link,
.image-card,
.quote-card {
  min-width: 0;
  border: 1px solid var(--border);
  border-left: 4px solid var(--club-green);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.content-card,
.product-card,
.quick-link {
  padding: 24px;
}

.product-card {
  position: relative;
}

.card-link {
  color: inherit;
  text-decoration: none;
}

.card-link::after {
  position: absolute;
  inset: 0;
  border-radius: 8px;
  content: "";
}

.card-link:focus-visible {
  outline: none;
}

.card-link:focus-visible::after {
  outline: 3px solid color-mix(in srgb, var(--club-green) 65%, transparent);
  outline-offset: 2px;
}

.content-card h2,
.content-card h3,
.product-card h2,
.product-card h3,
.quick-link h3 {
  margin: 0 0 10px;
  color: var(--club-blue);
  font-size: 20px;
  line-height: 1.4;
}

.content-card p,
.product-card p,
.quick-link p {
  margin: 0;
  color: var(--text-muted);
}

.quick-link {
  display: block;
  color: inherit;
  text-decoration: none;
}

.card-actions,
.page-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.page-actions {
  margin: 0 0 28px;
}

.card-actions {
  position: relative;
  z-index: 1;
  margin-top: 20px;
}

.button {
  display: inline-flex;
  min-height: 42px;
  border: 1px solid transparent;
  border-radius: 6px;
  align-items: center;
  justify-content: center;
  background: var(--club-blue);
  color: #fff;
  cursor: pointer;
  font-weight: 700;
  padding: 9px 17px;
  text-decoration: none;
  transition: background-color 150ms ease, border-color 150ms ease, transform 120ms ease;
}

.button-secondary {
  border-color: var(--border-strong);
  background: var(--surface);
  color: var(--club-blue);
}

.button-subtle {
  border-color: var(--border);
  background: transparent;
  color: var(--text-muted);
}

.metadata {
  display: flex;
  margin: 16px 0 0;
  padding: 14px 0 0;
  border-top: 1px solid var(--border);
  flex-wrap: wrap;
  gap: 8px 18px;
  color: var(--text-muted);
  font-size: 13px;
}

.image-card {
  overflow: hidden;
  border-left-width: 1px;
}

.image-card img {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  transition: transform 220ms var(--ease-out);
}

.image-card figcaption {
  border-top: 2px solid var(--club-green);
  color: var(--club-blue);
  font-weight: 700;
  padding: 13px 16px;
  text-align: center;
}

.timeline {
  position: relative;
  display: grid;
  gap: 26px;
}

.timeline::before {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 18px;
  width: 3px;
  background: var(--club-green);
  content: "";
}

.timeline-item {
  position: relative;
  margin-left: 48px;
}

.timeline-item::before {
  position: absolute;
  top: 27px;
  left: -38px;
  width: 14px;
  height: 14px;
  border: 3px solid var(--surface-subtle);
  border-radius: 50%;
  background: var(--club-green);
  content: "";
}

.quote-list {
  display: grid;
  gap: 18px;
}

.quote-card {
  position: relative;
  padding: 25px 28px;
  overflow: hidden;
}

.quote-card::before {
  position: absolute;
  top: 8px;
  left: 14px;
  color: color-mix(in srgb, var(--club-green) 15%, transparent);
  content: "“";
  font-family: Georgia, serif;
  font-size: 64px;
  line-height: 1;
}

.quote-card blockquote {
  position: relative;
  z-index: 1;
  margin: 0;
  color: var(--text-muted);
}

.quote-card cite {
  display: block;
  margin-top: 14px;
  color: var(--club-blue);
  font-style: normal;
  font-weight: 700;
  text-align: right;
}

.status-panel,
.empty-state,
.notice {
  border-radius: 8px;
  padding: 18px 20px;
}

.status-panel {
  border: 1px solid var(--warning-border);
  background: var(--warning-bg);
  color: var(--text);
}

.status-panel p,
.notice p,
.empty-state p {
  margin: 0;
}

.status-panel p + p {
  margin-top: 7px;
  color: var(--text-muted);
  font-size: 14px;
}

.empty-state {
  border: 1px dashed var(--border-strong);
  color: var(--text-muted);
  text-align: center;
}

.notice {
  border-left: 4px solid var(--club-blue);
  background: var(--surface-muted);
  color: var(--text-muted);
}

.upload-notice {
  margin-bottom: 18px;
}

.register-alternative {
  margin-top: 56px;
}

.form-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 520px);
  align-items: start;
  gap: 48px;
}

.form-shell {
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
  padding: 28px;
}

.form-shell > p,
.form-shell form > p {
  display: grid;
  margin: 0 0 18px;
  gap: 7px;
}

.form-shell label {
  color: var(--text);
  font-size: 14px;
  font-weight: 700;
}

.form-shell input[type="text"],
.form-shell input[type="password"],
.form-shell input[type="email"],
.form-shell input[type="file"],
.form-shell textarea,
.form-shell select {
  width: 100%;
  min-height: 44px;
  border: 1px solid var(--border-strong);
  border-radius: 6px;
  background: var(--surface);
  color: var(--text);
  padding: 9px 11px;
  transition: border-color 150ms ease, box-shadow 150ms ease;
}

.form-shell textarea {
  min-height: 150px;
  resize: vertical;
}

.form-shell input[type="file"] {
  padding: 7px;
}

.form-shell input:focus,
.form-shell textarea:focus,
.form-shell select:focus {
  border-color: var(--club-blue);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--club-blue) 14%, transparent);
  outline: none;
}

.form-shell .helptext,
.form-shell ul {
  margin: 0;
  color: var(--text-muted);
  font-size: 13px;
}

.form-shell ul {
  padding-left: 20px;
}

.form-shell .errorlist {
  margin: 0 0 8px;
  color: var(--danger);
  font-weight: 700;
}

.form-submit {
  margin-top: 8px;
}

.info-list {
  margin: 0;
  padding-left: 22px;
  color: var(--text-muted);
}

.info-list li + li {
  margin-top: 8px;
}

.site-footer {
  border-top: 3px solid var(--club-green);
  background: var(--footer-bg);
  color: var(--footer-text);
  padding: 42px 24px;
  text-align: center;
}

.footer-inner {
  display: grid;
  width: min(1120px, 100%);
  margin: 0 auto;
  grid-template-columns: 96px minmax(0, 1fr) 96px;
  align-items: center;
  gap: 24px;
}

.school-logo {
  display: block;
  width: 96px;
  height: 96px;
  object-fit: contain;
}

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

.site-footer strong {
  display: block;
  margin-bottom: 6px;
  color: #a8d66d;
  font-size: 18px;
}

.site-footer p {
  margin: 4px 0;
}

.footer-copyright {
  margin-top: 18px !important;
  font-size: 13px;
  opacity: 0.78;
}

.back-to-top {
  position: fixed;
  z-index: 80;
  right: 24px;
  bottom: 24px;
  border-color: transparent;
  background: var(--club-blue-strong);
  color: #fff;
  opacity: 0;
  pointer-events: none;
  transform: translateY(100%);
  transition: opacity 180ms var(--ease-out), transform 180ms var(--ease-out), background-color 150ms ease;
}

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

.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 240ms var(--ease-out), transform 240ms var(--ease-out);
}

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

@media (hover: hover) and (pointer: fine) {
  .nav-link:hover,
  .nav-button:hover,
  .theme-toggle:hover,
  .menu-toggle:hover {
    border-color: var(--club-green);
    background: var(--surface-muted);
    color: var(--club-blue);
  }

  .nav-auth-account:hover {
    border-color: var(--club-green);
    background: var(--club-green);
    color: #fff;
  }

  .nav-auth-logout:hover {
    border-color: var(--club-gold);
    background: var(--club-gold);
    color: #17120a;
  }

  .nav-admin:hover {
    border-color: var(--club-blue);
    background: var(--club-blue);
    color: #fff;
  }

  .nav-link:hover,
  .nav-button:hover,
  .button:hover {
    transform: translateY(-1px);
  }

  .button:hover {
    background: var(--club-blue-strong);
  }

  .button-secondary:hover,
  .button-subtle:hover {
    border-color: var(--club-green);
    background: var(--surface-muted);
    color: var(--club-blue);
  }

  .content-card,
  .product-card,
  .quick-link,
  .image-card,
  .quote-card {
    transition: border-color 160ms ease, box-shadow 160ms ease, transform 160ms var(--ease-out);
  }

  .content-card:hover,
  .product-card:hover,
  .quick-link:hover,
  .image-card:hover,
  .quote-card:hover {
    border-color: var(--club-green);
    box-shadow: 0 14px 34px rgba(31, 43, 110, 0.14);
    transform: translateY(-2px);
  }

  .image-card:hover img {
    transform: scale(1.03);
  }
}

@media (max-width: 1180px) {
  .header-inner {
    padding: 0 18px;
  }

  .brand span {
    display: none;
  }

  .nav-link,
  .nav-button {
    padding: 7px 8px;
    font-size: 13px;
  }
}

@media (max-width: 920px) {
  .menu-toggle {
    display: inline-flex;
  }

  .site-nav {
    justify-content: flex-end;
  }

  .nav-links {
    position: absolute;
    top: 71px;
    right: 0;
    left: 0;
    display: grid;
    max-height: calc(100vh - 72px);
    padding: 14px 18px 20px;
    overflow-y: auto;
    border-bottom: 1px solid var(--border);
    background: var(--surface);
    box-shadow: var(--shadow);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-12px);
    transition: opacity 180ms var(--ease-out), transform 180ms var(--ease-out);
  }

  .nav-links.is-open {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }

  .nav-link,
  .nav-button,
  .inline-form {
    width: 100%;
  }

  .nav-link,
  .nav-button {
    justify-content: flex-start;
    padding: 9px 11px;
  }

  .nav-user {
    display: block;
    max-width: 160px;
  }

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

  .form-layout {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .register-alternative {
    margin-top: 40px;
  }
}

@media (max-width: 640px) {
  .header-inner {
    min-height: 64px;
    padding: 0 14px;
  }

  .site-header {
    min-height: 64px;
  }

  .brand img {
    width: 38px;
    height: 38px;
  }

  .site-main {
    padding-top: 64px;
  }

  .nav-links {
    top: 63px;
    max-height: calc(100vh - 64px);
  }

  .nav-user {
    display: none;
  }

  .home-hero {
    min-height: 430px;
    padding: 54px 20px;
  }

  .home-hero h1 {
    font-size: 34px;
  }

  .hero-summary {
    font-size: 16px;
  }

  .page-shell {
    width: min(100% - 28px, 1120px);
    padding: 38px 0 56px;
  }

  .page-header h1,
  .section-heading {
    font-size: 27px;
  }

  .section-block {
    margin-bottom: 52px;
  }

  .section-heading-row {
    align-items: flex-start;
  }

  .section-heading-row .button {
    width: auto;
  }

  .content-grid,
  .product-grid,
  .quick-grid,
  .image-grid {
    grid-template-columns: 1fr;
  }

  .content-card,
  .product-card,
  .quick-link,
  .form-shell {
    padding: 20px;
  }

  .prose-panel {
    padding-left: 18px;
  }

  .button {
    width: 100%;
  }

  .card-actions .button {
    width: auto;
  }

  .back-to-top {
    right: 14px;
    bottom: 14px;
  }

  .site-footer {
    padding: 32px 16px;
  }

  .footer-inner {
    grid-template-columns: 62px minmax(0, 1fr);
    gap: 14px;
  }

  .school-logo {
    width: 62px;
    height: 62px;
  }

  .footer-balance {
    display: none;
  }

  .footer-copy {
    text-align: left;
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 1ms !important;
  }

  .reveal,
  .back-to-top,
  .nav-links {
    transform: none;
  }
}