/* ============================================================
   金宝博站 · 共享样式 /assets/site.css
   技术蓝图网格 · 都市夜行 · 深墨绿 / 暖金 / 朱红
   ============================================================ */

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  background-color: #071613;
  background-image:
    radial-gradient(900px 520px at 82% -8%, rgba(23, 69, 60, 0.85), transparent 62%),
    radial-gradient(760px 480px at 4% 6%, rgba(27, 47, 54, 0.92), transparent 60%),
    linear-gradient(180deg, #0E2A24 0%, #102A2E 40%, #0B2023 74%, #071613 100%);
  background-repeat: no-repeat;
  background-attachment: fixed;
  background-size: cover;
}

body,
h1, h2, h3, h4, h5,
p, ul, ol, dl, dd, figure, blockquote, fieldset {
  margin: 0;
}

ul, ol { padding: 0; }
ul:not([class]), ol:not([class]) { padding-inline-start: 1.4em; }

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

button { font: inherit; color: inherit; }

/* ---------- Tokens ---------- */
:root {
  --ink: #0E2A24;
  --pine: #17453C;
  --gold: #C9A45C;
  --gold-soft: #E8CF9D;
  --red: #D6402F;
  --red-deep: #A82B20;
  --mist: #A9B8B6;
  --paper: #EDF1EE;
  --night: #071613;
  --cloud: #1B2F36;

  --line-gold: rgba(201, 164, 92, 0.42);
  --line-soft: rgba(169, 184, 182, 0.22);

  --shadow-hard: 8px 8px 0 rgba(7, 22, 19, 0.72);
  --shadow-hard-sm: 4px 4px 0 rgba(7, 22, 19, 0.72);

  --font-display: "Archivo Black", "Noto Sans SC", "Source Han Sans SC", "PingFang SC", sans-serif;
  --font-body: "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "IBM Plex Mono", "JetBrains Mono", SFMono-Regular, Consolas, "Courier New", monospace;

  --step-6: clamp(2.4rem, 6vw, 5.6rem);
  --step-5: clamp(2rem, 4.4vw, 3.4rem);
  --step-4: clamp(1.45rem, 2.6vw, 2.1rem);
  --step-3: clamp(1.15rem, 1.8vw, 1.4rem);
  --step-2: 1.0625rem;
  --step-1: 0.9375rem;
  --step-0: 0.8125rem;
}

/* ---------- Base typography ---------- */
body {
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: var(--step-2);
  line-height: 1.75;
  color: var(--paper);
  background: transparent;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: -0.01em;
  color: var(--paper);
}

h1 { font-size: var(--step-6); }
h2 { font-size: var(--step-5); }
h3 { font-size: var(--step-4); }
h4 { font-size: var(--step-3); }

p { max-width: 72ch; }

a { color: var(--gold-soft); text-decoration: none; }

:focus-visible {
  outline: 3px solid var(--gold-soft);
  outline-offset: 3px;
  border-radius: 0;
}

::selection {
  background: var(--red);
  color: #fff;
}

/* ---------- Layout helpers ---------- */
.wrap {
  width: min(1240px, 100% - 2.5rem);
  margin-inline: auto;
}

.mono {
  font-family: var(--font-mono);
  font-size: var(--step-0);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mist);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gold);
}

.eyebrow::before {
  content: "";
  width: 2rem;
  height: 2px;
  background: var(--red);
  flex: none;
}

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 1.5rem;
}

.prose {
  max-width: 70ch;
  color: var(--paper);
}

.prose p { line-height: 1.85; }
.prose p + p { margin-top: 1.1em; }
.prose h2, .prose h3 { margin-top: 2em; margin-bottom: 0.6em; }
.prose ul, .prose ol { margin-block: 1em; padding-inline-start: 1.4em; }
.prose li { line-height: 1.8; }
.prose li + li { margin-top: 0.4em; }
.prose strong { color: var(--gold-soft); font-weight: 800; }

.prose a {
  color: var(--gold-soft);
  text-decoration: underline;
  text-decoration-color: rgba(201, 164, 92, 0.55);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.24em;
  transition: color 0.2s ease, text-decoration-color 0.2s ease;
}

.prose a:hover {
  color: #fff;
  text-decoration-color: var(--red);
}

.prose blockquote {
  margin-block: 1.6em;
  padding: 1rem 0 1rem 1.4rem;
  border-left: 3px solid var(--gold);
  color: var(--gold-soft);
}

/* ---------- Skip link ---------- */
.skip-link {
  position: absolute;
  left: 50%;
  top: 0;
  transform: translate(-50%, -140%);
  z-index: 300;
  padding: 0.7rem 1.5rem;
  background: var(--red);
  border: 2px solid var(--red-deep);
  color: #fff;
  font-family: var(--font-body);
  font-weight: 800;
  font-size: 0.9rem;
  letter-spacing: 0.04em;
  transition: transform 0.18s ease;
}

.skip-link:focus,
.skip-link:focus-visible {
  transform: translate(-50%, 0);
  outline-offset: -6px;
}

/* ============================================================
   页头 / 刊头
   ============================================================ */
.site-header {
  position: relative;
  isolation: isolate;
  z-index: 40;
  border-bottom: 3px solid var(--gold);
  background: linear-gradient(180deg,
    rgba(27, 47, 54, 0.94) 0%,
    rgba(14, 42, 36, 0.96) 55%,
    rgba(11, 33, 30, 0.99) 100%);
  box-shadow: 0 10px 0 rgba(7, 22, 19, 0.35);
  color: var(--paper);
}

.site-header::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(90deg, rgba(201, 164, 92, 0.10) 0 1px, transparent 1px 96px),
    repeating-linear-gradient(0deg, rgba(169, 184, 182, 0.07) 0 1px, transparent 1px 96px);
}

.site-header__rail {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.7rem 0;
  border-bottom: 1px solid var(--line-soft);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mist);
}

.rail-code {
  color: var(--gold);
  letter-spacing: 0.2em;
  white-space: nowrap;
}

.rail-note {
  color: var(--mist);
  text-align: right;
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.5rem;
  padding: 0.45rem 0.8rem;
  background: transparent;
  border: 2px solid var(--gold);
  color: var(--gold-soft);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.nav-toggle:hover,
.nav-toggle:focus-visible {
  background: rgba(201, 164, 92, 0.16);
  color: #fff;
}

.nav-toggle[aria-expanded="true"] {
  background: var(--red);
  border-color: var(--red);
  color: #fff;
}

.masthead {
  position: relative;
  padding: 2.4rem 0 1.5rem;
  text-align: center;
}

.masthead__brand {
  display: inline-block;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.6rem, 7.4vw, 5.2rem);
  line-height: 0.92;
  letter-spacing: 0.02em;
  color: var(--paper);
  text-shadow: 5px 5px 0 rgba(7, 22, 19, 0.8);
  transition: color 0.22s ease, text-shadow 0.22s ease;
}

.masthead__brand:hover,
.masthead__brand:focus-visible {
  color: var(--gold-soft);
  text-shadow: 5px 5px 0 var(--red-deep);
}

.masthead__tagline {
  margin: 0.95rem auto 0;
  max-width: none;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--gold);
}

/* ---------- 栏目索引条 ---------- */
.site-nav {
  position: relative;
  padding: 0.35rem 0 0.5rem;
}

.site-nav__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.2rem 0.35rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-nav__list a {
  position: relative;
  display: block;
  padding: 0.7rem 0.9rem;
  border: 2px solid transparent;
  color: var(--paper);
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  text-decoration: none;
  transition: color 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
}

.site-nav__list a::after {
  content: "";
  position: absolute;
  left: 0.9rem;
  right: 0.9rem;
  bottom: 0.42rem;
  height: 2px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.28s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.site-nav__list a:hover { color: #fff; }

.site-nav__list a:hover::after,
.site-nav__list a:focus-visible::after { transform: scaleX(1); }

.site-nav__list a[aria-current="page"] {
  color: #fff;
  background: rgba(201, 164, 92, 0.16);
  border-color: var(--gold);
}

/* ============================================================
   页脚
   ============================================================ */
.site-footer {
  position: relative;
  isolation: isolate;
  margin-top: 5rem;
  padding: 3.4rem 0 1.4rem;
  border-top: 3px solid var(--gold);
  background: linear-gradient(180deg, #0B221E 0%, #071613 62%, #071613 100%);
  color: var(--mist);
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(90deg, rgba(201, 164, 92, 0.07) 0 1px, transparent 1px 96px),
    repeating-linear-gradient(0deg, rgba(169, 184, 182, 0.05) 0 1px, transparent 1px 96px);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 0.85fr;
  gap: 2.5rem 3rem;
  align-items: start;
}

.footer-brand__mark {
  max-width: none;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.footer-brand__line {
  max-width: none;
  margin-top: 0.7rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gold);
}

.footer-brand__note {
  margin-top: 1rem;
  max-width: 46ch;
  font-size: 0.9rem;
  line-height: 1.85;
  color: var(--mist);
}

.footer-col__title {
  margin-bottom: 0.95rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--line-gold);
  font-family: var(--font-mono);
  font-weight: 400;
  font-size: 0.7rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gold);
}

.footer-contact {
  display: grid;
  gap: 0.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.copy-btn {
  display: grid;
  gap: 0.25rem;
  width: 100%;
  padding: 0.35rem 0 0.55rem 0.75rem;
  text-align: left;
  background: transparent;
  border: 0;
  border-left: 3px solid transparent;
  color: var(--paper);
  font-family: inherit;
  cursor: pointer;
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.copy-btn:hover,
.copy-btn:focus-visible {
  border-left-color: var(--gold);
  background: rgba(201, 164, 92, 0.08);
}

.copy-btn__tag {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold);
}

.copy-btn__value {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  line-height: 1.5;
  color: var(--paper);
  word-break: break-all;
}

.copy-btn__state {
  font-size: 0.6875rem;
  letter-spacing: 0.1em;
  color: rgba(169, 184, 182, 0.75);
  text-transform: none;
}

.copy-btn[data-copied="true"] {
  border-left-color: var(--red);
  background: rgba(214, 64, 47, 0.12);
}

.copy-btn[data-copied="true"] .copy-btn__state { color: var(--red); }

.footer-fact {
  display: grid;
  gap: 0.25rem;
  max-width: 30ch;
  padding: 0.35rem 0 0.55rem 0.75rem;
  border-left: 3px solid transparent;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--paper);
}

.footer-fact__tag {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold);
}

.footer-links {
  display: grid;
  gap: 0.1rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer-links a {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.45rem 0;
  border-bottom: 1px solid transparent;
  color: var(--paper);
  font-size: 0.9375rem;
  text-decoration: none;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.footer-links a::before {
  content: "→";
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--gold);
  transition: transform 0.2s ease;
}

.footer-links a:hover,
.footer-links a:focus-visible {
  color: var(--gold-soft);
  border-bottom-color: var(--gold);
}

.footer-links a:hover::before,
.footer-links a:focus-visible::before { transform: translateX(3px); }

.site-footer__base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem 1.6rem;
  margin-top: 3rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--line-soft);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.12em;
  color: rgba(169, 184, 182, 0.8);
}

.site-footer__base p { max-width: none; }

/* ============================================================
   通用组件
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.9rem 1.5rem;
  border: 2px solid var(--gold);
  background: transparent;
  color: var(--gold-soft);
  font-family: var(--font-body);
  font-weight: 800;
  font-size: 0.95rem;
  letter-spacing: 0.03em;
  text-decoration: none;
  cursor: pointer;
  box-shadow: var(--shadow-hard-sm);
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease,
              box-shadow 0.2s ease, transform 0.12s ease;
}

.btn:hover {
  background: rgba(201, 164, 92, 0.16);
  color: #fff;
}

.btn:active {
  transform: translate(1px, 1px);
  box-shadow: 2px 2px 0 rgba(7, 22, 19, 0.72);
}

.btn--red {
  background: var(--red);
  border-color: var(--red);
  color: #fff;
  box-shadow: 5px 5px 0 rgba(7, 22, 19, 0.75);
}

.btn--red:hover {
  background: var(--red-deep);
  border-color: var(--red-deep);
  color: #fff;
}

.btn--red:active {
  transform: translate(1px, 1px);
  box-shadow: 3px 3px 0 rgba(7, 22, 19, 0.75);
}

.btn--ghost {
  border-color: rgba(169, 184, 182, 0.45);
  color: var(--mist);
  box-shadow: none;
}

.btn--ghost:hover {
  border-color: var(--gold);
  color: var(--gold-soft);
  background: rgba(201, 164, 92, 0.1);
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.25rem 0.6rem;
  border: 2px solid rgba(169, 184, 182, 0.45);
  border-radius: 2px;
  background: rgba(23, 69, 60, 0.35);
  color: var(--mist);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  text-decoration: none;
  transition: border-color 0.2s ease, color 0.2s ease, background-color 0.2s ease;
}

.chip:hover {
  border-color: var(--gold);
  color: var(--gold-soft);
  background: rgba(201, 164, 92, 0.12);
}

.chip--gold {
  border-color: var(--gold);
  color: var(--gold-soft);
}

.chip--red {
  border-color: var(--red);
  background: rgba(214, 64, 47, 0.18);
  color: #fff;
}

.crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.12em;
  color: var(--mist);
}

.crumb li {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.crumb li + li::before {
  content: "/";
  color: rgba(169, 184, 182, 0.45);
}

.crumb a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.crumb a:hover {
  color: var(--gold-soft);
  border-bottom-color: var(--gold);
}

.crumb [aria-current="page"] { color: var(--gold-soft); }

.panel {
  padding: clamp(1.4rem, 3vw, 2.6rem);
  border: 3px solid var(--line-gold);
  background: linear-gradient(160deg, rgba(23, 69, 60, 0.72), rgba(10, 32, 28, 0.88));
  box-shadow: var(--shadow-hard);
}

.media-frame {
  position: relative;
  display: block;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  border: 3px solid rgba(201, 164, 92, 0.5);
  background:
    linear-gradient(135deg, rgba(23, 69, 60, 0.92) 0%, rgba(27, 47, 54, 0.92) 58%, rgba(11, 32, 32, 0.95) 100%);
  box-shadow: var(--shadow-hard);
}

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

.media-frame__label {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 0.45rem 0.8rem;
  border-top: 2px solid var(--gold);
  border-right: 2px solid var(--gold);
  background: rgba(7, 22, 19, 0.84);
  color: var(--gold-soft);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

/* ---------- 滚动进度条（JS 注入） ---------- */
.scroll-rail {
  position: fixed;
  inset: 0 0 auto 0;
  height: 3px;
  z-index: 90;
  background: rgba(7, 22, 19, 0.55);
  pointer-events: none;
}

.scroll-rail__bar {
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--gold) 0%, var(--red) 100%);
  transition: width 0.1s linear;
}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2.2rem;
  }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 960px) {
  .grid-12 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
}

@media (max-width: 860px) {
  .site-header__rail { padding: 0.55rem 0; }
  .rail-note { display: none; }
  .nav-toggle { display: inline-flex; }

  .site-nav {
    display: none;
    padding: 0 0 0.75rem;
    border-top: 1px solid var(--line-soft);
    background: linear-gradient(180deg, rgba(7, 22, 19, 0.55), rgba(7, 22, 19, 0.92));
  }

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

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

  .site-nav__list li { border-bottom: 1px solid var(--line-soft); }

  .site-nav__list a {
    padding: 0.95rem 1.25rem;
    border: 0;
    border-left: 3px solid transparent;
    font-size: 1rem;
  }

  .site-nav__list a::after { display: none; }

  .site-nav__list a[aria-current="page"] {
    border-left-color: var(--red);
    background: rgba(201, 164, 92, 0.12);
  }

  .masthead { padding: 1.7rem 0 1.1rem; }
  .masthead__tagline { letter-spacing: 0.22em; font-size: 0.66rem; }
}

@media (max-width: 640px) {
  .wrap { width: min(1240px, 100% - 1.5rem); }
  .grid-12 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
  .footer-brand { grid-column: auto; }
  .site-footer { margin-top: 3.5rem; padding-top: 2.6rem; }
  .site-footer__base { margin-top: 2.2rem; font-size: 0.625rem; }
  .masthead__brand { text-shadow: 4px 4px 0 rgba(7, 22, 19, 0.8); }
}

@media (max-width: 380px) {
  .rail-code { font-size: 0.58rem; letter-spacing: 0.1em; }
  .masthead__tagline { letter-spacing: 0.14em; }
}

/* ============================================================
   无障碍 / 降级
   ============================================================ */
@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;
    scroll-behavior: auto !important;
  }
  .scroll-rail__bar { transition: none; }
}