/* ==========================================================================
   /assets/site.css — 半岛体赛场 共享外壳
   reset / 变量 / 中文排版 / 头部 / 页脚 / 通用按钮 / 面包屑 / 容器 / 网格 / 基础组件
   ========================================================================== */

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

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

html,
body { height: 100%; }

body {
  margin: 0;
  background: var(--mist);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: clamp(1rem, 0.95rem + 0.22vw, 1.0625rem);
  line-height: 1.72;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

img { border: 0; }

ul,
ol { margin: 0; padding: 0; }

p { margin: 0 0 1em; }

h1, h2, h3, h4, h5, h6 {
  margin: 0 0 0.6em;
  font-family: var(--font-display);
  font-weight: 900;
  font-stretch: condensed;
  line-height: 1.1;
  letter-spacing: -0.012em;
  color: var(--night);
}

h1 { font-size: clamp(2rem, 4.6vw, 3.4rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.2rem); }
h3 { font-size: clamp(1.15rem, 2vw, 1.5rem); }

a { color: var(--moss); text-decoration-thickness: 1px; text-underline-offset: 0.22em; }
a:hover { color: var(--track); }

strong, b { font-weight: 700; color: var(--night); }

code, kbd, samp {
  font-family: var(--font-mono);
  font-size: 0.92em;
  background: rgba(174, 186, 180, 0.22);
  padding: 0.1em 0.36em;
  border-radius: 2px;
}

::selection {
  background: var(--sand);
  color: var(--night);
}

:focus-visible {
  outline: 3px solid var(--track);
  outline-offset: 3px;
  border-radius: 1px;
}

.site-footer :focus-visible,
.nav-bar :focus-visible,
.header-rail :focus-visible { outline-color: var(--sand); }

/* ---------------------------------------------------------------- 变量 */

:root {
  --sand: #C9933B;
  --sand-paper: #F4E7CE;
  --moss: #1F4D3B;
  --night: #0F241C;
  --track: #D94B2B;
  --steel: #6F8792;
  --mist: #F8F5EF;
  --ink: #222522;
  --glass: #AEBAB4;
  --warn: #E8B84A;

  --font-display: "Arial Narrow", "Helvetica Neue", "HarmonyOS Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
  --font-mono: ui-monospace, "SFMono-Regular", "Menlo", "Consolas", "Courier New", monospace;

  --wrap: 78rem;
  --gutter: clamp(1rem, 4vw, 2.5rem);
  --radius: 2px;
  --dur: 260ms;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* ---------------------------------------------------------------- 容器 */

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding-block: clamp(2.2rem, 5vw, 4rem); }

.prose { max-width: 68ch; }

.prose p { margin: 0 0 1.1em; }

.num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
  letter-spacing: 0.02em;
}

.display {
  margin: 0 0 0.5em;
  font-family: var(--font-display);
  font-weight: 900;
  font-stretch: condensed;
  font-size: clamp(2.2rem, 6vw, 4.6rem);
  line-height: 1.02;
  letter-spacing: -0.02em;
  color: var(--night);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  margin: 0 0 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--track);
}

.eyebrow::before {
  content: "";
  width: 1.6rem;
  height: 2px;
  background: var(--track);
}

.index-label {
  display: block;
  margin: 0 0 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--steel);
}

.rule {
  height: 0;
  border: 0;
  border-top: 1px solid rgba(34, 37, 34, 0.14);
  margin-block: clamp(1.6rem, 3vw, 2.4rem);
}

/* ---------------------------------------------------------------- 按钮 */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.78rem 1.35rem;
  border: 1px solid transparent;
  border-radius: var(--radius);
  background: transparent;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  line-height: 1.4;
  text-decoration: none;
  cursor: pointer;
  transition: transform var(--dur) var(--ease),
              background-color var(--dur) var(--ease),
              color var(--dur) var(--ease),
              border-color var(--dur) var(--ease);
}

.btn:hover { transform: translateY(-2px); }

.btn--primary { background: var(--track); color: #FFF; }
.btn--primary:hover { background: #BF4023; color: #FFF; }

.btn--sand { background: var(--sand); color: var(--night); }
.btn--sand:hover { background: #D8A347; color: var(--night); }

.btn--ghost {
  background: transparent;
  border-color: rgba(34, 37, 34, 0.28);
  color: var(--ink);
}
.btn--ghost:hover { border-color: var(--moss); color: var(--moss); }

.btn--on-dark {
  background: transparent;
  border-color: rgba(244, 231, 206, 0.42);
  color: var(--sand-paper);
}
.btn--on-dark:hover { border-color: var(--sand); color: var(--sand); }

/* ---------------------------------------------------------------- 面包屑 */

.breadcrumb { margin-block: 0 1.4rem; }

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--steel);
}

.breadcrumb li:not(:last-child)::after {
  content: "\2044";
  margin-inline-start: 0.5rem;
  color: var(--glass);
}

.breadcrumb a { color: var(--steel); text-decoration: none; }
.breadcrumb a:hover { color: var(--track); }
.breadcrumb [aria-current="page"] { color: var(--ink); }

/* ---------------------------------------------------------------- 网格 */

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(1rem, 2.4vw, 1.8rem);
}

.span-4 { grid-column: span 4; }
.span-5 { grid-column: span 5; }
.span-6 { grid-column: span 6; }
.span-7 { grid-column: span 7; }
.span-8 { grid-column: span 8; }
.span-12 { grid-column: span 12; }

/* ---------------------------------------------------------------- 卡片 */

.panel {
  padding: clamp(1.1rem, 2.4vw, 1.7rem);
  background: var(--mist);
  border: 1px solid rgba(34, 37, 34, 0.1);
  border-radius: var(--radius);
}

.panel--glass {
  background: rgba(174, 186, 180, 0.18);
  border-color: rgba(255, 255, 255, 0.38);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
}

.panel--dark {
  background: var(--moss);
  border-color: transparent;
  color: var(--sand-paper);
}

.panel--dark h2,
.panel--dark h3,
.panel--dark strong { color: var(--sand-paper); }

/* ---------------------------------------------------------------- 图片容器 */

.media-frame {
  position: relative;
  display: block;
  overflow: hidden;
  background: linear-gradient(140deg, var(--glass), var(--sand-paper));
  border-radius: var(--radius);
}

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

.media-frame--21x9 { aspect-ratio: 21 / 9; }
.media-frame--16x9 { aspect-ratio: 16 / 9; }
.media-frame--4x3 { aspect-ratio: 4 / 3; }
.media-frame--3x4 { aspect-ratio: 3 / 4; }
.media-frame--1x1 { aspect-ratio: 1 / 1; }

.media-frame--cut { clip-path: polygon(0 0, 100% 0, 100% 88%, 0 100%); }
.media-frame--cutl { clip-path: polygon(0 6%, 100% 0, 100% 100%, 0 100%); }

.media-cap {
  position: absolute;
  inset-block-end: 0;
  inset-inline: 0;
  padding: 0.6rem 0.8rem;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.16em;
  color: var(--night);
  background: linear-gradient(0deg, rgba(244, 231, 206, 0.94), rgba(244, 231, 206, 0));
}

/* ---------------------------------------------------------------- 章节高亮 */

[data-section-link] {
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

[data-section-link][data-active] {
  color: var(--track);
  font-weight: 700;
}

/* ==========================================================================
   头部
   ========================================================================== */

.site-header {
  position: relative;
  z-index: 40;
  background: var(--mist);
}

.progress-track {
  position: fixed;
  top: 0;
  right: 0;
  left: 0;
  height: 4px;
  background: rgba(31, 77, 59, 0.12);
  z-index: 60;
  pointer-events: none;
}

.progress-bar {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--sand) 0%, var(--track) 100%);
  transition: width 0.12s linear;
}

.skip-link {
  position: absolute;
  top: 0;
  left: 50%;
  z-index: 100;
  padding: 0.7rem 1.4rem;
  background: var(--track);
  color: #FFF;
  font-size: 0.88rem;
  letter-spacing: 0.1em;
  text-decoration: none;
  border-radius: 0 0 var(--radius) var(--radius);
  transform: translate(-50%, -160%);
  transition: transform var(--dur) var(--ease);
}

.skip-link:focus,
.skip-link:focus-visible {
  transform: translate(-50%, 0);
  color: #FFF;
}

/* 顶部状态索引栏 ------------------------------------------------ */

.header-rail {
  background: var(--night);
  color: var(--sand-paper);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  padding-block: 0.46rem;
}

.rail-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem 1rem;
}

.rail-note {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  margin: 0;
  color: var(--sand-paper);
}

.dot {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--warn);
  box-shadow: 0 0 0 3px rgba(232, 184, 74, 0.22);
  flex: 0 0 auto;
}

.rail-num {
  font-family: var(--font-mono);
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--warn);
}

.rail-actions {
  display: flex;
  align-items: center;
  gap: clamp(0.6rem, 2vw, 1.5rem);
}

.rail-link {
  color: var(--glass);
  text-decoration: none;
  transition: color var(--dur) var(--ease);
}

.rail-link:hover,
.rail-link:focus-visible { color: var(--sand-paper); }

.rail-link--accent {
  color: var(--warn);
  font-weight: 600;
}

.rail-link--accent:hover,
.rail-link--accent:focus-visible { color: var(--sand); }

/* 居中刊头 ------------------------------------------------------ */

.masthead-wrap { padding-block: clamp(1.1rem, 2.6vw, 2rem) clamp(0.9rem, 2vw, 1.5rem); }

.masthead {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 1rem;
}

.masthead-aside {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--steel);
}

.masthead-aside--right { text-align: right; }

.brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.34rem;
  line-height: 1;
  text-decoration: none;
  color: var(--night);
}

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

.brand-mark {
  width: 2.7rem;
  height: 0.4rem;
  background: var(--track);
  clip-path: polygon(0 100%, 14% 0, 100% 0, 86% 100%);
  transition: background-color var(--dur) var(--ease);
}

.brand:hover .brand-mark { background: var(--sand); }

.brand-name {
  font-family: var(--font-display);
  font-weight: 900;
  font-stretch: condensed;
  font-size: clamp(2rem, 5.2vw, 3.4rem);
  letter-spacing: 0.055em;
  line-height: 1;
  color: inherit;
  transition: color var(--dur) var(--ease);
}

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

.brand-sub {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.44em;
  text-indent: 0.44em;
  color: var(--steel);
}

/* 主导航 -------------------------------------------------------- */

.nav-bar {
  background: var(--moss);
  color: var(--sand-paper);
  border-top: 3px solid var(--sand);
}

.nav-inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 3.15rem;
  padding-block: 0.2rem;
}

.nav-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: clamp(0.55rem, 2.4vw, 2rem);
  list-style: none;
}

.nav-list a {
  position: relative;
  display: inline-block;
  padding: 0.6rem 0.15rem;
  color: var(--sand-paper);
  font-size: 0.94rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-decoration: none;
  transition: color var(--dur) var(--ease);
}

.nav-list a::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0.16rem;
  left: 0;
  height: 2px;
  background: var(--track);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--dur) var(--ease);
}

.nav-list a:hover { color: #FFF; }
.nav-list a:hover::after { transform: scaleX(1); }

.nav-list a[aria-current="page"] {
  color: var(--warn);
  font-weight: 700;
}

.nav-list a[aria-current="page"]::after {
  background: var(--warn);
  transform: scaleX(1);
}

.nav-meta {
  position: absolute;
  top: 50%;
  right: 0;
  margin: 0;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.2em;
  color: var(--glass);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.6rem;
  padding: 0.5rem 0.85rem;
  border: 1px solid rgba(244, 231, 206, 0.42);
  border-radius: var(--radius);
  background: transparent;
  color: var(--sand-paper);
  font-family: inherit;
  font-size: 0.84rem;
  letter-spacing: 0.16em;
  cursor: pointer;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.nav-toggle:hover { border-color: var(--sand); color: var(--sand); }

.nav-toggle-bars {
  position: relative;
  display: block;
  width: 1.15rem;
  height: 2px;
  background: currentColor;
  transition: background-color var(--dur) var(--ease);
}

.nav-toggle-bars::before,
.nav-toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: currentColor;
  transition: transform var(--dur) var(--ease), top var(--dur) var(--ease);
}

.nav-toggle-bars::before { top: -6px; }
.nav-toggle-bars::after { top: 6px; }

.nav-toggle[aria-expanded="true"] .nav-toggle-bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::before { top: 0; transform: rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after { top: 0; transform: rotate(-45deg); }

.nav-toggle-text { line-height: 1; }

/* ==========================================================================
   页脚
   ========================================================================== */

.site-footer {
  position: relative;
  margin-block-start: clamp(3rem, 8vw, 6rem);
  padding-block: clamp(2.4rem, 5vw, 3.6rem) 1.4rem;
  background: var(--night);
  color: var(--sand-paper);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: -1.05rem;
  right: 0;
  left: 0;
  height: 1.05rem;
  background: linear-gradient(96deg, var(--sand) 0 42%, var(--track) 42% 55%, var(--moss) 55% 100%);
  clip-path: polygon(0 100%, 0 56%, 100% 0, 100% 44%);
  pointer-events: none;
}

.footer-main {
  display: grid;
  grid-template-columns: 1.5fr 0.9fr 0.9fr 0.9fr 1.35fr;
  gap: clamp(1.2rem, 3vw, 2.4rem);
  padding-block-end: clamp(1.6rem, 3vw, 2.4rem);
  border-bottom: 1px solid rgba(244, 231, 206, 0.16);
}

.footer-brand-name {
  margin: 0 0 0.4rem;
  font-family: var(--font-display);
  font-weight: 900;
  font-stretch: condensed;
  font-size: 1.6rem;
  letter-spacing: 0.08em;
  line-height: 1.1;
  color: var(--sand);
}

.footer-brand-line {
  max-width: 24ch;
  margin: 0 0 0.7rem;
  font-size: 0.86rem;
  line-height: 1.62;
  color: rgba(244, 231, 206, 0.82);
}

.footer-index {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.18em;
  color: rgba(174, 186, 180, 0.9);
}

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

.footer-col-title {
  margin: 0 0 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--glass);
}

.footer-links {
  display: grid;
  gap: 0.5rem;
  list-style: none;
}

.footer-links a {
  color: var(--sand-paper);
  font-size: 0.9rem;
  letter-spacing: 0.04em;
  text-decoration: none;
  transition: color var(--dur) var(--ease);
}

.footer-links a:hover,
.footer-links a:focus-visible { color: var(--sand); }

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

.contact-row {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
  margin: 0 0 0.7rem;
  font-size: 0.86rem;
  line-height: 1.5;
}

.contact-label {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--glass);
}

.contact-value {
  color: var(--sand-paper);
  overflow-wrap: anywhere;
}

.footer-note {
  margin: 0.9rem 0 0;
  font-size: 0.76rem;
  line-height: 1.68;
  color: rgba(174, 186, 180, 0.94);
}

.footer-base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem 1.4rem;
  padding-block-start: 1.1rem;
}

.footer-legal {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--glass);
}

.footer-legal--right { color: rgba(174, 186, 180, 0.78); }

/* ==========================================================================
   响应式
   ========================================================================== */

@media (max-width: 1100px) {
  .nav-meta { display: none; }
}

@media (max-width: 1024px) {
  .footer-main { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-brand,
  .footer-contact { grid-column: span 2; }
}

@media (max-width: 900px) {
  .span-4,
  .span-5,
  .span-6,
  .span-7,
  .span-8 { grid-column: span 12; }
}

@media (max-width: 780px) {
  .masthead {
    grid-template-columns: 1fr;
    justify-items: center;
    gap: 0.55rem;
  }

  .masthead-aside { display: none; }

  .nav-inner {
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    padding-block: 0.45rem;
  }

  .nav-toggle { display: inline-flex; }

  .nav-list {
    display: none;
    flex-basis: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    margin-block-start: 0.4rem;
    border-top: 1px solid rgba(244, 231, 206, 0.18);
  }

  .nav-list[data-open] { display: flex; }

  .nav-list a {
    padding: 0.74rem 0.2rem;
    border-bottom: 1px solid rgba(244, 231, 206, 0.1);
  }

  .nav-list a::after { display: none; }

  .nav-list a[aria-current="page"] {
    background: rgba(232, 184, 74, 0.12);
    padding-inline-start: 0.6rem;
  }

  .rail-inner { justify-content: flex-start; }
}

@media (max-width: 560px) {
  .footer-main { grid-template-columns: 1fr; }
  .footer-brand,
  .footer-contact { grid-column: span 1; }
  .footer-base { justify-content: flex-start; }
  .brand-sub { letter-spacing: 0.32em; text-indent: 0.32em; }
}

/* ==========================================================================
   降低动效 / 打印
   ========================================================================== */

@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;
  }

  .btn:hover { transform: none; }
}

@media print {
  .site-header,
  .site-footer,
  .progress-track,
  .skip-link { display: none !important; }
}