/* =========================================================
   江南平台赛事 · /assets/site.css
   共享外壳：reset / 变量 / 中文排版 / 头部 / 页脚 / 通用组件
   ========================================================= */

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

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

body {
  margin: 0;
  background-color: #F4EFE6;
  background-color: var(--paper);
  color: #14181A;
  color: var(--ink);
  font-family: "Source Han Sans SC", "Noto Sans SC", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  font-family: var(--font-body);
  font-size: 16.5px;
  font-size: var(--fs-body);
  line-height: 1.75;
  font-feature-settings: "tnum" 0;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* ---------- 变量 ---------- */
:root {
  /* 色板 */
  --dai: #1F3A3D;        /* 黛青 */
  --ink: #14181A;        /* 墨黑 */
  --paper: #F4EFE6;      /* 暖纸 */
  --lotus: #C9B8C6;      /* 藕荷 */
  --cinnabar: #C8402F;   /* 朱砂红 */
  --gold: #C9A227;       /* 鎏金 */
  --slate: #6E8588;      /* 青灰 */
  --sand: #E8DFD2;       /* 浅砂 */
  --jade: #2F6B5E;       /* 赛程绿 */
  --white: #FFFFFF;      /* 纸白 */

  /* 线与面 */
  --line: rgba(20, 24, 26, 0.14);
  --line-strong: rgba(20, 24, 26, 0.3);
  --line-invert: rgba(244, 239, 230, 0.18);
  --ink-soft: rgba(20, 24, 26, 0.78);
  --ink-mute: rgba(20, 24, 26, 0.58);
  --paper-soft: rgba(244, 239, 230, 0.82);
  --paper-mute: rgba(244, 239, 230, 0.58);

  /* 字体 */
  --font-display: "Source Han Serif SC", "Noto Serif SC", "Songti SC",
    "STSong", "SimSun", Georgia, serif;
  --font-body: "Source Han Sans SC", "Noto Sans SC", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-mono: "IBM Plex Mono", "JetBrains Mono", ui-monospace, SFMono-Regular,
    Menlo, Consolas, "Courier New", monospace;

  /* 字号 */
  --fs-body: 16.5px;
  --fs-sm: 13.5px;
  --fs-xs: 12px;
  --fs-h1: clamp(32px, 4.4vw, 54px);
  --fs-h2: clamp(25px, 2.9vw, 34px);
  --fs-h3: clamp(19px, 1.9vw, 23px);

  /* 度量 */
  --shell-max: 1320px;
  --shell-pad: clamp(16px, 3.4vw, 56px);
  --gutter: 24px;
}

/* ---------- 基础排版 ---------- */
h1, h2, h3, h4, h5, h6 {
  margin: 0 0 0.55em;
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.24;
  letter-spacing: -0.005em;
  color: var(--dai);
  text-wrap: balance;
}

h1 { font-size: var(--fs-h1); }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); }
h4 { font-size: 17px; }

p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }

ul, ol { margin: 0 0 1em; padding-left: 1.35em; }

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

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

small { font-size: var(--fs-sm); }

hr {
  height: 1px;
  border: 0;
  background: var(--line);
  margin: 0;
}

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

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

table {
  width: 100%;
  border-collapse: collapse;
  font-variant-numeric: tabular-nums;
}

/* ---------- 焦点与可访问性 ---------- */
:focus-visible {
  outline: 2px solid var(--cinnabar);
  outline-offset: 3px;
  border-radius: 2px;
}

.site-footer :focus-visible { outline-color: var(--gold); }

/* ---------- 跳过导航 ---------- */
.skip-link {
  position: absolute;
  left: 50%;
  top: 6px;
  z-index: 300;
  transform: translate(-50%, -220%);
  padding: 10px 20px;
  background: var(--dai);
  color: var(--paper);
  font-size: 14px;
  letter-spacing: 0.04em;
  border: 1px solid var(--gold);
  border-radius: 999px;
  transition: transform 180ms ease;
}

.skip-link:focus,
.skip-link:focus-visible {
  transform: translate(-50%, 0);
  outline-offset: 4px;
}

/* =========================================================
   头部：悬浮胶囊浮岛
   ========================================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 120;
  background: rgba(244, 239, 230, 0.9);
  -webkit-backdrop-filter: saturate(140%) blur(10px);
  backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--line);
}

.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: linear-gradient(90deg, var(--cinnabar) 0%, var(--gold) 55%, var(--dai) 100%);
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform 120ms linear;
  pointer-events: none;
  z-index: 2;
}

.header-rail {
  max-width: var(--shell-max);
  margin-inline: auto;
  padding: 12px var(--shell-pad);
  transition: padding 220ms ease;
}

.site-header[data-scrolled="true"] .header-rail { padding-block: 5px; }

.nav-capsule {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 7px 8px 7px 18px;
  background: var(--paper);
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  box-shadow: 0 14px 30px -26px rgba(31, 58, 61, 0.95);
  transition: padding 220ms ease, box-shadow 220ms ease;
}

.site-header[data-scrolled="true"] .nav-capsule {
  padding-block: 4px;
  box-shadow: 0 18px 34px -24px rgba(31, 58, 61, 0.9);
}

/* 品牌轨道 */
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
  text-decoration: none;
  color: var(--dai);
}

.brand::before {
  content: "";
  flex: none;
  width: 26px;
  height: 26px;
  border: 1px solid var(--dai);
  background-color: var(--lotus);
  background-image:
    linear-gradient(var(--dai), var(--dai)),
    linear-gradient(var(--dai), var(--dai));
  background-size: 1px 100%, 100% 1px;
  background-position: center center, center center;
  background-repeat: no-repeat;
  transition: background-color 200ms ease, border-color 200ms ease;
}

.brand:hover::before {
  background-color: var(--cinnabar);
  border-color: var(--cinnabar);
}

.brand-mark {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 19px;
  line-height: 1.2;
  letter-spacing: 0.02em;
  color: var(--dai);
  white-space: nowrap;
}

.brand-note {
  padding-left: 12px;
  border-left: 1px solid var(--line-strong);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--slate);
  white-space: nowrap;
}

/* 移动端菜单按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  flex: none;
  padding: 9px 16px 9px 14px;
  font-family: var(--font-body);
  font-size: 13.5px;
  line-height: 1;
  color: var(--dai);
  background: transparent;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  cursor: pointer;
  transition: color 160ms ease, border-color 160ms ease, background-color 160ms ease;
}

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

.nav-capsule[data-open="true"] .nav-toggle {
  color: var(--cinnabar);
  border-color: var(--cinnabar);
  background: var(--sand);
}

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

.nav-toggle-icon::before,
.nav-toggle-icon::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  height: 1.5px;
  background: currentColor;
  transition: transform 180ms ease, top 180ms ease;
}

.nav-toggle-icon::before { top: 0; }
.nav-toggle-icon::after { top: 8.5px; }

.nav-capsule[data-open="true"] .nav-toggle-icon::before {
  top: 4.25px;
  transform: rotate(45deg);
}

.nav-capsule[data-open="true"] .nav-toggle-icon::after {
  top: 4.25px;
  transform: rotate(-45deg);
}

.nav-toggle-text { letter-spacing: 0.06em; }

/* 栏目索引 */
.nav-panel {
  display: flex;
  align-items: center;
  gap: clamp(8px, 1vw, 18px);
}

.nav-list {
  display: flex;
  align-items: center;
  gap: clamp(10px, 1.1vw, 20px);
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-link {
  position: relative;
  display: inline-block;
  padding: 8px 2px;
  font-size: 15px;
  line-height: 1.3;
  color: var(--ink);
  white-space: nowrap;
  transition: color 180ms ease;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 2px;
  height: 1px;
  background: var(--cinnabar);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 180ms ease;
}

.nav-link:hover,
.nav-link:focus-visible { color: var(--dai); }

.nav-link:hover::after,
.nav-link:focus-visible::after { transform: scaleX(1); }

.nav-link[aria-current="page"] {
  color: var(--cinnabar);
  font-weight: 600;
}

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

.nav-cta {
  flex: none;
  margin-left: 4px;
}

/* =========================================================
   通用容器与版式组件
   ========================================================= */
.container {
  width: 100%;
  max-width: var(--shell-max);
  margin-inline: auto;
  padding-inline: var(--shell-pad);
}

.section { padding-block: clamp(44px, 6.5vw, 92px); }

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 12px 32px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line-strong);
  margin-bottom: clamp(20px, 3vw, 34px);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cinnabar);
}

.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: var(--cinnabar);
}

.display-title {
  margin: 0 0 0.45em;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-h1);
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--dai);
  text-wrap: balance;
}

.lede {
  max-width: 36em;
  font-size: clamp(16px, 1.4vw, 18.5px);
  line-height: 1.8;
  color: var(--ink-soft);
}

.prose { max-width: 38em; }
.prose p { margin-bottom: 1.1em; }
.prose h2,
.prose h3 { margin-top: 1.6em; }

.prose a {
  color: var(--dai);
  border-bottom: 1px solid var(--cinnabar);
  transition: color 180ms ease, border-color 180ms ease;
}

.prose a:hover { color: var(--cinnabar); }

.rule {
  height: 1px;
  border: 0;
  background: var(--line);
  margin: 0;
}

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

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 22px;
  font-family: var(--font-body);
  font-size: 14.5px;
  line-height: 1.2;
  letter-spacing: 0.02em;
  color: var(--paper);
  background: var(--dai);
  border: 1px solid var(--dai);
  border-radius: 999px;
  cursor: pointer;
  text-decoration: none;
  transition: background-color 180ms ease, color 180ms ease,
    border-color 180ms ease, transform 180ms ease;
}

.btn:hover {
  background: var(--cinnabar);
  border-color: var(--cinnabar);
  color: var(--paper);
}

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

.btn-primary {
  background: var(--cinnabar);
  border-color: var(--cinnabar);
  color: var(--white);
}

.btn-primary:hover {
  background: var(--dai);
  border-color: var(--dai);
  color: var(--paper);
}

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

.btn-outline:hover {
  background: var(--dai);
  color: var(--paper);
}

.btn-ghost {
  background: transparent;
  border-color: transparent;
  color: var(--dai);
  padding-inline: 10px;
}

.btn-ghost:hover {
  background: transparent;
  border-color: transparent;
  color: var(--cinnabar);
}

.btn-sm {
  padding: 8px 17px;
  font-size: 13.5px;
}

/* ---------- 面包屑 ---------- */
.breadcrumb { margin-bottom: 22px; }

.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--slate);
}

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

.breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  margin: 0 9px;
  color: var(--slate);
  opacity: 0.65;
}

.breadcrumb-item a {
  color: var(--slate);
  transition: color 160ms ease;
}

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

.breadcrumb-item [aria-current="page"] { color: var(--dai); }

/* ---------- 面板 / 旁注 / 标签 ---------- */
.panel {
  padding: clamp(18px, 2.2vw, 26px);
  background: var(--sand);
  border: 1px solid var(--line-strong);
}

.note-card {
  padding: 16px 18px;
  background: var(--sand);
  border-left: 2px solid var(--lotus);
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.tag {
  display: inline-block;
  padding: 3px 9px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.5;
  letter-spacing: 0.08em;
  color: var(--dai);
  background: var(--white);
  border: 1px solid var(--line-strong);
}

.tag--live {
  color: var(--white);
  background: var(--cinnabar);
  border-color: var(--cinnabar);
}

.tag--done {
  color: var(--white);
  background: var(--jade);
  border-color: var(--jade);
}

.tag--time {
  color: var(--dai);
  background: var(--gold);
  border-color: var(--gold);
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 15px;
  font-family: var(--font-body);
  font-size: 13.5px;
  line-height: 1.3;
  color: var(--ink);
  background: transparent;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  cursor: pointer;
  transition: background-color 160ms ease, border-color 160ms ease,
    color 160ms ease;
}

.chip:hover {
  color: var(--cinnabar);
  border-color: var(--cinnabar);
}

.chip[aria-pressed="true"],
.chip[data-active="true"] {
  color: var(--cinnabar);
  background: var(--sand);
  border-color: var(--cinnabar);
}

/* ---------- 图片容器基础规则 ---------- */
.img-frame {
  position: relative;
  display: block;
  margin: 0;
  overflow: hidden;
  background: linear-gradient(150deg, var(--sand) 0%, var(--lotus) 100%);
  border: 1px solid var(--line-strong);
}

.img-frame > img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.82) contrast(1.02);
}

.img-frame > figcaption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 12px 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.6;
  letter-spacing: 0.06em;
  color: var(--paper);
  background: linear-gradient(transparent, rgba(20, 24, 26, 0.74));
}

.img-frame--wide { aspect-ratio: 16 / 9; }
.img-frame--tall { aspect-ratio: 3 / 4; }
.img-frame--square { aspect-ratio: 1 / 1; }

.img-frame--arch { border-radius: 999px 999px 0 0; }

.img-frame--duotone::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(
    160deg,
    rgba(31, 58, 61, 0.44) 0%,
    rgba(201, 184, 198, 0.26) 55%,
    rgba(200, 64, 47, 0.22) 100%
  );
  mix-blend-mode: multiply;
}

/* ---------- 淡入（data-reveal） ---------- */
[data-reveal] {
  opacity: 1;
  transform: none;
  transition: opacity 520ms ease, transform 520ms ease;
}

.js [data-reveal]:not(.is-revealed) {
  opacity: 0;
  transform: translateY(14px);
}

/* =========================================================
   页脚：深黛青 + 窗格网格
   ========================================================= */
.site-footer {
  margin-top: clamp(48px, 7vw, 104px);
  padding-top: clamp(40px, 5.5vw, 72px);
  background-color: var(--dai);
  background-image:
    repeating-linear-gradient(90deg, rgba(244, 239, 230, 0.055) 0 1px, transparent 1px 96px),
    repeating-linear-gradient(180deg, rgba(244, 239, 230, 0.055) 0 1px, transparent 1px 96px);
  color: var(--paper-soft);
  font-size: 14.5px;
  line-height: 1.75;
}

.footer-inner {
  max-width: var(--shell-max);
  margin-inline: auto;
  padding-inline: var(--shell-pad);
}

.footer-top {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px 48px;
  padding-bottom: clamp(24px, 3vw, 34px);
  border-bottom: 1px solid var(--line-invert);
}

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

.footer-brand-name {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(22px, 2.4vw, 28px);
  line-height: 1.2;
  letter-spacing: 0.04em;
  color: var(--paper);
}

.footer-brand-note {
  margin: 8px 0 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.footer-contact {
  display: grid;
  gap: 6px;
  justify-items: start;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.03em;
}

.footer-contact-line {
  margin: 0;
  color: var(--paper-mute);
}

.footer-link {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 160ms ease, border-color 160ms ease;
}

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

.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 28px clamp(20px, 3vw, 44px);
  padding-block: clamp(28px, 4vw, 46px);
}

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

.footer-col-title {
  margin: 0 0 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line-invert);
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold);
}

.footer-links {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer-links .footer-link {
  display: inline-block;
  padding-bottom: 2px;
  font-size: 14.5px;
  color: var(--paper-soft);
  border-bottom-color: transparent;
  background-image: linear-gradient(var(--cinnabar), var(--cinnabar));
  background-size: 0% 1px;
  background-position: 0 100%;
  background-repeat: no-repeat;
  transition: color 180ms ease, background-size 200ms ease;
}

.footer-links .footer-link:hover,
.footer-links .footer-link:focus-visible {
  color: var(--paper);
  border-bottom-color: transparent;
  background-size: 100% 1px;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 24px;
  padding-block: 18px 26px;
  border-top: 1px solid var(--line-invert);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--paper-mute);
}

.footer-icp,
.footer-legal { margin: 0; }

/* =========================================================
   响应式
   ========================================================= */
@media (max-width: 1200px) {
  .brand-note { display: none; }
}

@media (max-width: 1023px) {
  .nav-toggle { display: inline-flex; }

  .nav-panel {
    position: absolute;
    top: calc(100% + 8px);
    left: -1px;
    right: -1px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
    padding: 12px;
    background: var(--paper);
    border: 1px solid var(--line-strong);
    border-radius: 20px;
    box-shadow: 0 26px 50px -30px rgba(20, 24, 26, 0.85);
  }

  .nav-capsule[data-open="true"] .nav-panel { display: flex; }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
  }

  .nav-link {
    display: block;
    padding: 11px 14px;
    border-radius: 12px;
    font-size: 15.5px;
  }

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

  .nav-link:hover,
  .nav-link:focus-visible { background: var(--sand); }

  .nav-link[aria-current="page"] {
    background: var(--sand);
    color: var(--cinnabar);
  }

  .nav-cta {
    margin: 8px 0 0;
    width: 100%;
  }
}

@media (max-width: 860px) {
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-top { flex-direction: column; }
}

@media (max-width: 720px) {
  :root { --gutter: 16px; }

  body { font-size: 16px; }

  .brand-mark { font-size: 17.5px; }
  .brand::before { width: 22px; height: 22px; }
  .nav-capsule { padding-left: 14px; gap: 10px; }
  .nav-toggle { padding: 8px 13px 8px 11px; font-size: 13px; }
  .nav-toggle-text { display: none; }

  .grid-12 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
}

@media (max-width: 520px) {
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
}

/* ---------- 减少动态 ---------- */
@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;
  }

  .nav-link::after,
  .footer-links .footer-link,
  .scroll-progress { transition: none; }

  [data-reveal],
  .js [data-reveal]:not(.is-revealed) {
    opacity: 1;
    transform: none;
  }

  .btn:active { transform: none; }
}