/* ============================================================
   /assets/site.css — 6号平台手机版 共享外壳
   夜间控制台 + 出版纸面：深墨蓝底、奶油纸层、荧光青路径、
   琥珀橙版本提示、红橙点色、雾灰绿辅助层。
   ============================================================ */

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

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

body,
h1, h2, h3, h4, p, ul, ol, li, figure, blockquote, dl, dd {
  margin: 0;
}

ul, ol { padding: 0; list-style: none; }

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

button { font: inherit; color: inherit; }

a { color: inherit; }

/* ---------- tokens ---------- */
:root {
  --ink: #0B1626;
  --panel: #101F33;
  --paper: #F3E9D2;
  --paper-2: #E8DCC3;
  --paper-ink: #241A16;
  --cyan: #33E0D0;
  --amber: #F5A623;
  --coral: #E85D3F;
  --mist: #8FA79B;
  --glass: rgba(51, 224, 208, 0.10);
  --line-dark: rgba(143, 167, 155, 0.28);
  --line-paper: rgba(36, 26, 22, 0.16);

  --font-head: "Helvetica Neue", "Arial Narrow", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, "Liberation Mono", monospace;

  --w: 1240px;
  --pad: clamp(16px, 4vw, 40px);
  --radius: 2px;
  --ease: cubic-bezier(0.2, 0.7, 0.3, 1);
}

/* ---------- base ---------- */
body {
  min-height: 100vh;
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.75;
  background-color: var(--ink);
  background-image:
    radial-gradient(1100px 520px at 84% -10%, rgba(51, 224, 208, 0.13), transparent 62%),
    radial-gradient(780px 460px at 6% 14%, rgba(245, 166, 35, 0.09), transparent 62%),
    repeating-linear-gradient(0deg, transparent 0 63px, rgba(143, 167, 155, 0.055) 63px 64px),
    repeating-linear-gradient(90deg, transparent 0 63px, rgba(143, 167, 155, 0.055) 63px 64px);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-head);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.12;
  color: var(--paper);
}

h1 { font-size: clamp(30px, 4.6vw, 52px); }
h2 { font-size: clamp(25px, 3.4vw, 38px); }
h3 { font-size: clamp(19px, 2.2vw, 25px); letter-spacing: -0.01em; }
h4 { font-size: 17px; letter-spacing: 0; }

p { text-wrap: pretty; }

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

a:hover { color: #6ff3e6; }

code, kbd, samp, pre { font-family: var(--font-mono); font-size: 0.92em; }

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: var(--radius);
}

.paper :focus-visible { outline-color: var(--coral); }

/* ---------- skip link ---------- */
.skip-link {
  position: absolute;
  left: 12px;
  top: -72px;
  z-index: 120;
  display: inline-block;
  padding: 12px 18px;
  background: var(--cyan);
  color: #04140f;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-decoration: none;
  border-radius: var(--radius);
  transition: top 0.18s var(--ease);
}

.skip-link:focus { top: 12px; color: #04140f; }

/* ---------- header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: linear-gradient(180deg, rgba(11, 22, 38, 0.97), rgba(11, 22, 38, 0.86));
  -webkit-backdrop-filter: blur(14px) saturate(130%);
  backdrop-filter: blur(14px) saturate(130%);
  border-bottom: 1px solid var(--line-dark);
  color: var(--paper);
}

.header__inner {
  width: 100%;
  max-width: var(--w);
  margin: 0 auto;
  padding: 13px var(--pad);
  display: flex;
  align-items: center;
  gap: clamp(10px, 2vw, 26px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  text-decoration: none;
  color: var(--paper);
  flex: 0 0 auto;
}

.brand:hover { color: var(--paper); }

.brand__mark {
  display: inline-block;
  padding: 7px 9px;
  background: var(--cyan);
  color: #04140f;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.06em;
  border-radius: var(--radius);
  box-shadow: 0 0 0 1px rgba(51, 224, 208, 0.34), 0 8px 22px rgba(51, 224, 208, 0.16);
}

.brand__text {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 0;
}

.brand__name {
  font-family: var(--font-head);
  font-size: 16px;
  font-weight: 800;
  letter-spacing: -0.01em;
  line-height: 1.1;
  white-space: nowrap;
}

.brand__tagline {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  line-height: 1;
  color: var(--mist);
  text-transform: uppercase;
  white-space: nowrap;
}

.brand--footer { align-items: center; }
.brand--footer .brand__name { font-size: 17px; }
.brand--footer .brand__mark { font-size: 16px; padding: 8px 10px; }

.site-nav { margin-left: auto; }

.nav__list {
  display: flex;
  align-items: center;
  gap: clamp(2px, 1.1vw, 14px);
}

.nav__link {
  position: relative;
  display: inline-block;
  padding: 8px 10px;
  font-family: var(--font-head);
  font-size: clamp(12.5px, 1.05vw, 13.5px);
  font-weight: 700;
  letter-spacing: 0.01em;
  line-height: 1.2;
  color: rgba(243, 233, 210, 0.72);
  text-decoration: none;
  border-radius: var(--radius);
  white-space: nowrap;
  transition: color 0.18s var(--ease), background-color 0.18s var(--ease);
}

.nav__link::after {
  content: "";
  position: absolute;
  left: 10px;
  right: 10px;
  bottom: 2px;
  height: 2px;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.22s var(--ease);
}

.nav__link:hover {
  color: var(--paper);
  background: var(--glass);
}

.nav__link:hover::after { transform: scaleX(1); }

.nav__link[aria-current="page"] {
  color: var(--cyan);
  background: var(--glass);
}

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

.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  margin-left: auto;
  padding: 9px 12px;
  background: var(--glass);
  color: var(--paper);
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  cursor: pointer;
  transition: border-color 0.18s var(--ease), background-color 0.18s var(--ease);
}

.nav-toggle:hover {
  border-color: var(--cyan);
  background: rgba(51, 224, 208, 0.16);
}

.nav-toggle__label { line-height: 1; }

.nav-toggle__bars {
  position: relative;
  display: block;
  width: 16px;
  height: 10px;
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 2px;
  background: var(--cyan);
  transition: transform 0.22s var(--ease), top 0.22s var(--ease);
}

.nav-toggle__bars::before { top: 1px; }
.nav-toggle__bars::after { top: 7px; }

.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before {
  top: 4px;
  transform: rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after {
  top: 4px;
  transform: rotate(-45deg);
}

.header__progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  pointer-events: none;
}

.header__progress span {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--cyan), var(--amber));
  transition: width 0.12s linear;
}

@keyframes navIn {
  from { opacity: 0; transform: translateY(-8px); }
  to   { opacity: 1; transform: none; }
}

/* ---------- footer ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(48px, 8vw, 96px);
  background: linear-gradient(180deg, rgba(16, 31, 51, 0.94), var(--ink) 46%);
  border-top: 1px solid var(--line-dark);
  color: var(--paper);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(
    90deg,
    var(--cyan) 0 20%,
    var(--amber) 20% 38%,
    var(--coral) 38% 46%,
    rgba(143, 167, 155, 0.32) 46% 100%
  );
}

.footer__inner {
  width: 100%;
  max-width: var(--w);
  margin: 0 auto;
  padding: clamp(38px, 6vw, 66px) var(--pad) clamp(26px, 4vw, 44px);
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 46px);
}

.footer__brand { display: block; }

.footer__stamp {
  display: inline-block;
  margin-top: 18px;
  padding: 6px 10px;
  border: 1px solid rgba(245, 166, 35, 0.42);
  border-radius: var(--radius);
  background: rgba(245, 166, 35, 0.07);
  color: var(--amber);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  line-height: 1.5;
}

.footer__note {
  margin-top: 14px;
  max-width: 44ch;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

.footer__cols {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(148px, 1fr));
  gap: clamp(20px, 3vw, 34px);
  align-content: start;
}

.footer__col { min-width: 0; }

.footer__col-title {
  margin-bottom: 14px;
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.2em;
  line-height: 1.4;
  text-transform: uppercase;
}

.footer__links { display: grid; gap: 9px; }

.footer__links a {
  display: inline-block;
  padding-bottom: 2px;
  color: rgba(243, 233, 210, 0.78);
  font-size: 14.5px;
  line-height: 1.55;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.footer__links a:hover {
  color: var(--paper);
  border-bottom-color: var(--cyan);
}

.footer__contact {
  padding-left: 0;
  border-left: 0;
}

.footer__contact-list { display: grid; gap: 13px; }

.footer__contact-list li {
  display: grid;
  gap: 3px;
}

.footer__contact-label {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.18em;
  line-height: 1.4;
  color: var(--mist);
  text-transform: uppercase;
}

.footer__contact-value {
  font-size: 14.5px;
  line-height: 1.6;
  color: rgba(243, 233, 210, 0.88);
  overflow-wrap: anywhere;
}

.footer__meta {
  max-width: var(--w);
  margin: 0 auto;
  padding: 18px var(--pad) 30px;
  border-top: 1px solid var(--line-dark);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 24px;
}

.footer__legal {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.05em;
  line-height: 1.7;
  color: var(--mist);
}

.footer__legal-links {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 20px;
}

.footer__legal-links a {
  font-size: 12.5px;
  color: rgba(243, 233, 210, 0.7);
  text-decoration: none;
  transition: color 0.18s var(--ease);
}

.footer__legal-links a:hover { color: var(--cyan); }

/* ---------- layout primitives ---------- */
.container {
  width: 100%;
  max-width: var(--w);
  margin-inline: auto;
  padding-inline: var(--pad);
}

.stack {
  display: grid;
  gap: var(--stack-gap, 18px);
}

.grid {
  display: grid;
  gap: clamp(16px, 2.4vw, 26px);
  grid-template-columns: 1fr;
}

.grid--auto { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }

.prose { max-width: 70ch; }
.prose p + p { margin-top: 1em; }
.prose h2, .prose h3 { margin-top: 1.6em; }

.rule {
  height: 0;
  border: 0;
  border-top: 1px solid var(--line-dark);
  margin-block: clamp(24px, 4vw, 42px);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.22em;
  line-height: 1.4;
  text-transform: uppercase;
  color: var(--cyan);
}

.eyebrow::before {
  content: "";
  display: block;
  width: 22px;
  height: 2px;
  background: var(--cyan);
}

/* ---------- panels ---------- */
.panel {
  position: relative;
  padding: clamp(20px, 3vw, 32px);
  background: linear-gradient(180deg, rgba(16, 31, 51, 0.96), rgba(11, 22, 38, 0.9));
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  color: var(--paper);
}

.paper {
  padding: clamp(20px, 3vw, 34px);
  background: var(--paper);
  color: var(--paper-ink);
  border-radius: var(--radius);
  box-shadow: 0 18px 38px rgba(3, 9, 18, 0.34);
}

.paper h1,
.paper h2,
.paper h3,
.paper h4 { color: var(--paper-ink); }

.paper a { color: #0d5f57; }
.paper a:hover { color: #b03a24; }
.paper .rule { border-top-color: var(--line-paper); }

/* ---------- tags ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 9px;
  border: 1px solid currentColor;
  border-radius: 1px;
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  line-height: 1.5;
  text-transform: uppercase;
  white-space: nowrap;
}

.tag--amber { color: var(--amber); }
.tag--coral { color: var(--coral); }
.tag--mist { color: var(--mist); }

.tag--solid {
  background: var(--cyan);
  border-color: var(--cyan);
  color: #04140f;
}

.paper .tag { color: #0d5f57; }
.paper .tag--amber { color: #8a5a00; }
.paper .tag--coral { color: #b03a24; }
.paper .tag--mist { color: #4d5f56; }
.paper .tag--solid { color: #04140f; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 20px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-family: var(--font-head);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.02em;
  line-height: 1;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.16s var(--ease), background-color 0.18s var(--ease),
    color 0.18s var(--ease), border-color 0.18s var(--ease);
}

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

.btn--primary {
  background: var(--cyan);
  border-color: var(--cyan);
  color: #04140f;
}

.btn--primary:hover {
  background: #66f4e7;
  color: #04140f;
}

.btn--ghost {
  background: transparent;
  border-color: rgba(143, 167, 155, 0.45);
  color: var(--paper);
}

.btn--ghost:hover {
  border-color: var(--cyan);
  color: var(--cyan);
  background: var(--glass);
}

.btn--amber {
  background: var(--amber);
  border-color: var(--amber);
  color: #2a1a02;
}

.btn--amber:hover {
  background: #ffb944;
  color: #2a1a02;
}

.paper .btn--ghost {
  color: var(--paper-ink);
  border-color: rgba(36, 26, 22, 0.35);
}

.paper .btn--ghost:hover {
  color: #0d5f57;
  border-color: #0d5f57;
  background: rgba(36, 26, 22, 0.06);
}

/* ---------- breadcrumbs ---------- */
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  line-height: 1.6;
  color: var(--mist);
}

.breadcrumbs li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.breadcrumbs li + li::before {
  content: "/";
  color: rgba(143, 167, 155, 0.6);
}

.breadcrumbs a {
  color: var(--mist);
  text-decoration: none;
  transition: color 0.18s var(--ease);
}

.breadcrumbs a:hover { color: var(--cyan); }

.paper .breadcrumbs { color: rgba(36, 26, 22, 0.6); }
.paper .breadcrumbs a { color: rgba(36, 26, 22, 0.66); }
.paper .breadcrumbs a:hover { color: #b03a24; }
.paper .breadcrumbs li + li::before { color: rgba(36, 26, 22, 0.4); }

/* ---------- media containers (页面阶段放图使用) ---------- */
.media {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  background: var(--panel);
}

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

.media--square { aspect-ratio: 1 / 1; }
.media--tall { aspect-ratio: 3 / 4; }
.media--wide { aspect-ratio: 21 / 9; }

.media--empty {
  background-image:
    linear-gradient(135deg, rgba(51, 224, 208, 0.14), transparent 62%),
    repeating-linear-gradient(45deg, rgba(143, 167, 155, 0.12) 0 2px, transparent 2px 12px);
}

.media__caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  line-height: 1.6;
  color: var(--mist);
}

.paper .media { border-color: var(--line-paper); }
.paper .media__caption { color: rgba(36, 26, 22, 0.62); }

/* ---------- reveal ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.5s var(--ease), transform 0.5s var(--ease);
}

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

/* ---------- responsive ---------- */
@media (min-width: 700px) {
  .grid--2,
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 760px) {
  .footer__inner { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer__brand { grid-column: 1 / -1; }
}

@media (min-width: 1060px) {
  .grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (min-width: 1100px) {
  .footer__inner {
    grid-template-columns: 1.15fr 1.6fr 1fr;
    align-items: start;
  }
  .footer__brand { grid-column: auto; }
  .footer__contact {
    padding-left: clamp(18px, 2vw, 28px);
    border-left: 1px solid var(--line-dark);
  }
}

@media (max-width: 1080px) {
  .nav-toggle { display: inline-flex; }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    margin-left: 0;
    padding: 10px var(--pad) 22px;
    background: var(--panel);
    border-bottom: 1px solid var(--line-dark);
    box-shadow: 0 26px 44px rgba(3, 9, 18, 0.5);
  }

  .site-nav[data-open="true"] {
    display: block;
    animation: navIn 0.22s var(--ease) both;
  }

  .nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .nav__link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 10px;
    font-size: 15px;
    border-bottom: 1px solid var(--line-dark);
  }

  .nav__link::after { display: none; }

  .nav__link[aria-current="page"] {
    color: var(--cyan);
    background: var(--glass);
  }
}

@media (max-width: 480px) {
  body { font-size: 16px; }
  .brand__tagline { display: none; }
  .header__inner { padding-block: 11px; }
  .footer__meta { justify-content: flex-start; }
}

/* ---------- motion & print safety ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

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

  .btn:hover { transform: none; }
}

@media print {
  .site-header,
  .site-footer,
  .skip-link { display: none; }
  body { background: #fff; color: #000; }
}