/* =============================================
   青漫水映 · 全站共享样式 /assets/site.css
   ============================================= */

/* ---------- CSS Variables ---------- */
:root {
  --ink: #081C34;
  --water: #0E3A6E;
  --magenta: #F0328C;
  --paper: #F5E9D7;
  --cream: #FDF7EF;
  --gold: #F5B841;
  --cyan: #5BC0BE;
  --purple: #7A4EAB;
  --charcoal: #15181E;
  --silver: #B8C4C9;

  --display: "Noto Sans SC", "HarmonyOS Sans SC", "Microsoft YaHei", sans-serif;
  --body: "Noto Sans SC", "Source Han Sans SC", "Microsoft YaHei", sans-serif;
  --data: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --duration: 0.6s;
  --radius: 4px;
  --shadow: 0 8px 24px rgba(8, 28, 52, 0.12);
}

/* ---------- Reset & Base ---------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--body);
  font-size: 16px;
  line-height: 1.7;
  color: var(--ink);
  background: var(--cream);
  min-height: 100vh;
  overflow-x: hidden;
}

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

a {
  color: var(--water);
  text-decoration: underline;
  text-underline-offset: 3px;
}

a:hover {
  color: var(--magenta);
}

ul, ol {
  list-style: none;
}

button {
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
}

/* ---------- Typography ---------- */
h1, h2, h3, h4 {
  font-family: var(--display);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.25;
  color: var(--ink);
}

h1 {
  font-size: clamp(2.2rem, 5vw, 3.6rem);
}

h2 {
  font-size: clamp(1.7rem, 3.5vw, 2.6rem);
}

h3 {
  font-size: clamp(1.2rem, 2vw, 1.5rem);
}

p {
  margin-bottom: 1rem;
}

code, pre, .mono {
  font-family: var(--data);
  font-size: 0.9em;
}

/* ---------- Focus Visible ---------- */
:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ---------- Skip Link ---------- */
.skip-link {
  position: fixed;
  top: 0;
  left: 50%;
  transform: translateX(-50%) translateY(-300%);
  background: var(--magenta);
  color: var(--cream);
  padding: 0.7rem 1.4rem;
  border-radius: 0 0 8px 8px;
  font-size: 0.85rem;
  font-weight: 700;
  text-decoration: none;
  z-index: 1000;
  box-shadow: 0 8px 24px rgba(240, 50, 140, 0.3);
  transition: transform 0.4s var(--ease);
}

.skip-link:focus {
  transform: translateX(-50%) translateY(0);
}

/* ---------- Layout Container ---------- */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 2rem;
}

.section {
  padding: 4rem 0;
  position: relative;
}

.section-header {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: 2.5rem;
}

.section-index {
  font-family: var(--data);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--magenta);
  letter-spacing: 0.08em;
  flex-shrink: 0;
}

.section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  margin: 0;
}

.content-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 2rem;
}

.page-content {
  min-height: 60vh;
  padding-bottom: 4rem;
}

/* ---------- Breadcrumb ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--data);
  font-size: 0.8rem;
  color: var(--silver);
  padding: 1.25rem 0;
}

.breadcrumb a {
  color: var(--cyan);
  text-decoration: none;
  transition: color 0.3s ease;
}

.breadcrumb a:hover {
  color: var(--magenta);
}

.breadcrumb-item {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.breadcrumb-item + .breadcrumb-item::before {
  content: '/';
  color: var(--silver);
}

.breadcrumb-current {
  color: var(--paper);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.65rem 1.4rem;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-family: var(--body);
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  line-height: 1.4;
  transition: all 0.4s var(--ease);
}

.btn-primary {
  background: var(--magenta);
  color: var(--cream);
  box-shadow: 0 4px 16px rgba(240, 50, 140, 0.28);
}

.btn-primary:hover {
  background: #d4237a;
  color: var(--cream);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(240, 50, 140, 0.35);
}

.btn-outline {
  background: transparent;
  color: var(--ink);
  border-color: var(--ink);
}

.btn-outline:hover {
  background: var(--ink);
  color: var(--cream);
  transform: translateY(-2px);
}

.btn-ghost {
  background: transparent;
  color: var(--magenta);
}

.btn-ghost:hover {
  background: rgba(240, 50, 140, 0.08);
  color: var(--magenta);
}

/* ---------- Cards ---------- */
.card {
  background: var(--cream);
  border: 1px solid rgba(8, 28, 52, 0.08);
  border-radius: 12px;
  padding: 1.5rem;
  box-shadow: var(--shadow);
  transition: transform 0.5s var(--ease), box-shadow 0.5s var(--ease);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(8, 28, 52, 0.14);
}

.card-title {
  font-size: 1.15rem;
  margin-bottom: 0.5rem;
}

.card-body {
  font-size: 0.92rem;
  color: rgba(8, 28, 52, 0.75);
  margin: 0;
}

/* ---------- Tags ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.22rem 0.75rem;
  border-radius: 999px;
  font-family: var(--data);
  font-size: 0.72rem;
  font-weight: 600;
  background: rgba(91, 192, 190, 0.12);
  color: var(--cyan);
  border: 1px solid rgba(91, 192, 190, 0.3);
  white-space: nowrap;
}

.tag-magenta {
  background: rgba(240, 50, 140, 0.1);
  color: var(--magenta);
  border-color: rgba(240, 50, 140, 0.25);
}

.tag-gold {
  background: rgba(245, 184, 65, 0.12);
  color: #c98b1d;
  border-color: rgba(245, 184, 65, 0.35);
}

/* ---------- Visual Frame / Image Placeholder ---------- */
.visual-frame {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, var(--water) 0%, var(--ink) 100%);
  border-radius: 14px;
  min-height: 240px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 16px 40px rgba(8, 28, 52, 0.18);
}

.visual-frame::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 0;
  background:
    radial-gradient(circle at 72% 22%, rgba(240, 50, 140, 0.35) 0%, transparent 55%),
    radial-gradient(circle at 18% 82%, rgba(91, 192, 190, 0.3) 0%, transparent 50%),
    radial-gradient(circle at 50% 50%, rgba(245, 184, 65, 0.14) 0%, transparent 65%);
}

.visual-frame::after {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 0;
  background: repeating-linear-gradient(
    90deg,
    transparent 0,
    transparent 3px,
    rgba(253, 247, 239, 0.04) 3px,
    rgba(253, 247, 239, 0.04) 4px
  );
}

.visual-frame > * {
  position: relative;
  z-index: 1;
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.04);
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--magenta) 0%, var(--gold) 100%);
  transform: scaleX(0);
  transform-origin: 0 0;
  z-index: 999;
  pointer-events: none;
  transition: transform 0.15s linear;
}

.header-banner {
  background: var(--ink);
  border-bottom: 1px solid rgba(91, 192, 190, 0.15);
}

.header-shell {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 2rem;
}

.header-banner-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  min-height: 60px;
  gap: 1.5rem;
}

.brand-block {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  min-width: 0;
}

.brand-logo {
  display: inline-flex;
  align-items: baseline;
  gap: 0.3rem;
  text-decoration: none;
  white-space: nowrap;
}

.brand-logo:hover {
  color: inherit;
}

.brand-mark {
  font-family: var(--display);
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--gold);
  letter-spacing: -0.02em;
}

.brand-divider {
  font-family: var(--data);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--magenta);
}

.brand-name {
  font-family: var(--display);
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--cream);
  letter-spacing: -0.02em;
}

.brand-tagline {
  margin: 0;
  font-size: 0.78rem;
  line-height: 1.45;
  color: var(--silver);
  border-left: 2px solid var(--magenta);
  padding-left: 0.8rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-shrink: 0;
}

.brand-status {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--data);
  font-size: 0.68rem;
  letter-spacing: 0.04em;
  color: var(--cyan);
  border: 1px solid rgba(91, 192, 190, 0.35);
  padding: 0.32rem 0.85rem;
  border-radius: 999px;
  background: rgba(91, 192, 190, 0.08);
  white-space: nowrap;
}

.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: var(--cyan);
  box-shadow: 0 0 10px var(--cyan);
  animation: status-pulse 2.4s ease-in-out infinite;
}

.status-text {
  letter-spacing: 0.05em;
}

@keyframes status-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.header-nav-wrap {
  background: linear-gradient(180deg, var(--water) 0%, #0B2C54 100%);
  border-bottom: 1px solid rgba(240, 50, 140, 0.18);
  box-shadow: 0 6px 24px rgba(8, 28, 52, 0.18);
}

.header-nav-wrap::before {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: linear-gradient(90deg, var(--magenta) 0%, transparent 45%, var(--cyan) 100%);
  opacity: 0.5;
}

.header-nav-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 48px;
}

.primary-nav {
  display: flex;
  align-items: center;
  gap: 0.2rem;
  width: 100%;
}

.nav-item {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 1.05rem;
  font-family: var(--body);
  font-size: 0.92rem;
  font-weight: 500;
  color: rgba(253, 247, 239, 0.8);
  text-decoration: none;
  border-radius: 3px;
  transition: color 0.3s ease, background 0.3s ease;
}

.nav-item::after {
  content: '';
  position: absolute;
  left: 1.05rem;
  right: 1.05rem;
  bottom: 0.12rem;
  height: 2px;
  background: var(--magenta);
  transform: scaleX(0);
  transform-origin: 0 1;
  transition: transform 0.45s var(--ease);
}

.nav-item:hover {
  color: var(--cream);
  background: rgba(245, 184, 65, 0.08);
}

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

.nav-item[aria-current="page"] {
  color: var(--cream);
  background: var(--magenta);
  box-shadow: 0 4px 16px rgba(240, 50, 140, 0.35);
}

.nav-item[aria-current="page"]::after {
  display: none;
}

/* Navigation toggle – hidden on desktop */
.nav-toggle {
  display: none;
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--charcoal);
  color: var(--silver);
  position: relative;
  margin-top: 5rem;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: -36px;
  left: 0;
  right: 0;
  height: 36px;
  background: var(--charcoal);
  border-radius: 45% 55% 0 0 / 80% 100% 0 0;
}

.footer-wave {
  position: absolute;
  top: -1px;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, rgba(245, 184, 65, 0.3), rgba(240, 50, 140, 0.4), rgba(91, 192, 190, 0.3));
  z-index: 1;
}

.footer-shell {
  max-width: 1280px;
  margin: 0 auto;
  padding: 3.5rem 2rem 1.5rem;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.4fr 2.2fr;
  gap: 3rem;
  padding-bottom: 3rem;
}

.footer-brand-block {
  max-width: 34rem;
}

.footer-brand {
  font-size: 2rem;
  color: var(--cream);
  margin: 0 0 0.4rem;
  letter-spacing: -0.02em;
}

.footer-brand::after {
  content: '';
  display: block;
  width: 36px;
  height: 3px;
  background: var(--magenta);
  margin-top: 0.6rem;
  border-radius: 2px;
}

.footer-tagline {
  font-size: 0.9rem;
  color: var(--silver);
  margin: 0 0 1.2rem;
  border-left: 3px solid var(--magenta);
  padding-left: 0.8rem;
}

.footer-note {
  font-size: 0.8rem;
  line-height: 1.7;
  color: rgba(184, 196, 201, 0.72);
  margin: 0;
}

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

.footer-heading {
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--gold);
  margin: 0 0 1rem;
  padding-bottom: 0.45rem;
  border-bottom: 1px solid rgba(245, 184, 65, 0.22);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer-links a {
  color: var(--silver);
  text-decoration: none;
  font-size: 0.88rem;
  transition: color 0.3s ease, padding-left 0.3s ease;
}

.footer-links a:hover {
  color: var(--magenta);
  padding-left: 4px;
}

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.contact-item {
  font-size: 0.85rem;
  line-height: 1.55;
  margin: 0;
  color: rgba(184, 196, 201, 0.85);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(253, 247, 239, 0.07);
}

.footer-copyright {
  font-family: var(--data);
  font-size: 0.76rem;
  color: var(--silver);
  margin: 0;
}

.footer-icp {
  font-family: var(--data);
  font-size: 0.76rem;
  color: rgba(184, 196, 201, 0.6);
  margin: 0;
}

/* ---------- Reveal Animation ---------- */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

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

/* ---------- Body Nav Open Overlay ---------- */
body.nav-open {
  overflow: hidden;
}

body.nav-open::after {
  content: '';
  position: fixed;
  inset: 0;
  background: rgba(8, 28, 52, 0.55);
  z-index: 90;
}

/* ---------- Responsive: Tablet ---------- */
@media (max-width: 1023px) {
  .brand-tagline {
    display: none;
  }

  .nav-item {
    padding: 0.5rem 0.8rem;
    font-size: 0.86rem;
  }

  .nav-item::after {
    left: 0.8rem;
    right: 0.8rem;
  }

  .footer-top {
    grid-template-columns: 1fr 1.6fr;
  }
}

/* ---------- Responsive: Mobile ---------- */
@media (max-width: 768px) {
  .container,
  .header-shell,
  .footer-shell {
    padding-left: 1rem;
    padding-right: 1rem;
  }

  .section {
    padding: 2.5rem 0;
  }

  .content-grid {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }

  .header-banner-row {
    min-height: 54px;
    gap: 0.5rem;
  }

  .brand-mark,
  .brand-name {
    font-size: 1.3rem;
  }

  .brand-status {
    display: none;
  }

  /* Nav toggle */
  .nav-toggle {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    background: none;
    border: 1px solid rgba(253, 247, 239, 0.22);
    padding: 0.4rem 0.55rem;
    border-radius: 4px;
    color: var(--cream);
    cursor: pointer;
    transition: border-color 0.3s ease, background 0.3s ease;
  }

  .nav-toggle:hover {
    border-color: var(--magenta);
    background: rgba(240, 50, 140, 0.1);
  }

  .nav-toggle-box {
    display: flex;
    flex-direction: column;
    gap: 4px;
    align-items: center;
    justify-content: center;
  }

  .nav-toggle-line {
    display: block;
    width: 18px;
    height: 2px;
    background: var(--cream);
    border-radius: 2px;
    transition: transform 0.4s var(--ease), opacity 0.3s ease;
  }

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

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

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

  .nav-toggle-text {
    font-family: var(--data);
    font-size: 0.56rem;
    letter-spacing: 0.1em;
    margin-top: 2px;
  }

  /* Drawer */
  .header-nav-wrap {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: min(320px, 86vw);
    height: 100dvh;
    background: var(--ink);
    border-left: 1px solid rgba(240, 50, 140, 0.4);
    box-shadow: -16px 0 40px rgba(0, 0, 0, 0.4);
    transform: translateX(105%);
    transition: transform 0.6s var(--ease);
    overflow-y: auto;
    z-index: 200;
    padding: 6rem 1.5rem 2rem;
    background-image:
      radial-gradient(circle at 80% 15%, rgba(240, 50, 140, 0.12) 0%, transparent 45%),
      radial-gradient(circle at 20% 85%, rgba(91, 192, 190, 0.1) 0%, transparent 45%);
  }

  .header-nav-wrap[data-open] {
    transform: translateX(0);
  }

  .header-nav-wrap::before {
    display: none;
  }

  .header-nav-wrap .header-shell {
    padding: 0;
    max-width: none;
  }

  .header-nav-row {
    min-height: 0;
    width: 100%;
  }

  .primary-nav {
    flex-direction: column;
    align-items: stretch;
    gap: 0.35rem;
  }

  .nav-item {
    font-size: 1.05rem;
    padding: 0.75rem 1rem;
    border-radius: 6px;
    border-bottom: 1px solid rgba(253, 247, 239, 0.06);
    width: 100%;
  }

  .nav-item::after {
    display: none;
  }

  /* Footer */
  .footer-top {
    grid-template-columns: 1fr;
    gap: 2.2rem;
    padding-bottom: 2rem;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 1.6rem;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 0.5rem;
    text-align: center;
  }

  .visual-frame {
    min-height: 180px;
  }
}

/* ---------- Small Mobile ---------- */
@media (max-width: 480px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }

  .btn {
    width: 100%;
  }
}

/* ---------- Reduced Motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }

  .status-dot {
    animation: none;
  }

  .header-nav-wrap {
    transition: none;
  }

  .nav-toggle-line {
    transition: none;
  }

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

  .scroll-progress {
    transition: none;
  }
}