/* =========================================================
   PP服务中心 · 共享样式 /assets/site.css
   夜间控制室语汇：深靛蓝基底 + 琥珀金入口 + 青瓷绿状态
   ========================================================= */

:root {
  /* 品牌色 */
  --indigo-950: #071326;
  --indigo-800: #0F2544;
  --indigo-700: #17355E;
  --amber: #F2B33D;
  --amber-soft: #FFD98A;
  --celadon: #46C9AE;
  --celadon-deep: #1E8E79;
  --warm-gray: #D9D0C0;
  --cool-white: #F2F6FA;
  --paper: #FBF7EE;
  --charcoal: #171C26;

  /* 结构 */
  --rail-w: 88px;
  --topbar-h: 64px;
  --gap: 24px;
  --edge: clamp(18px, 4vw, 56px);
  --maxw: 1280px;

  /* 字体 */
  --font-display: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: "Inter", "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  /* 线条与阴影 */
  --line: rgba(70, 201, 174, 0.20);
  --line-strong: rgba(70, 201, 174, 0.42);
  --muted: rgba(242, 246, 250, 0.62);
  --shadow-hard: 8px 8px 0 rgba(7, 19, 38, 0.60);

  /* 运行时变量（JS 写入） */
  --scroll-progress: 0%;
}

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

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

body {
  margin: 0;
  padding-left: var(--rail-w);
  min-height: 100vh;
  background: var(--indigo-950);
  color: var(--cool-white);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scrollbar-color: var(--celadon-deep) var(--indigo-950);
}

h1, h2, h3, h4, h5, h6, p, figure, blockquote, dl, dd, address { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
img, svg, video { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
address { font-style: normal; }

/* ---------- 中文排版基调 ---------- */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.14;
  text-wrap: balance;
}
h1 { font-size: clamp(2.125rem, 5vw, 4.5rem); font-weight: 900; }
h2 { font-size: clamp(1.75rem, 3.2vw, 2.5rem); }
h3 { font-size: clamp(1.15rem, 1.8vw, 1.4rem); font-weight: 700; }
h4 { font-size: 1rem; font-weight: 700; letter-spacing: 0.02em; }

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

#main-content { display: block; scroll-margin-top: 0; }

/* ---------- 可达性 ---------- */
:focus-visible {
  outline: 3px solid var(--amber);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  top: 8px;
  left: 8px;
  z-index: 999;
  transform: translateY(-200%);
  padding: 10px 16px;
  background: var(--amber);
  color: var(--charcoal);
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
  border: 2px solid var(--charcoal);
  box-shadow: 4px 4px 0 var(--celadon-deep);
}
.skip-link:focus { transform: translateY(0); }

body.nav-open { overflow: hidden; }

/* ---------- 容器与网格 ---------- */
.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--edge);
}

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

.col-3 { grid-column: span 3; }
.col-4 { grid-column: span 4; }
.col-5 { grid-column: span 5; }
.col-6 { grid-column: span 6; }
.col-7 { grid-column: span 7; }
.col-8 { grid-column: span 8; }
.col-12 { grid-column: span 12; }

/* ---------- 色彩分区 ---------- */
.zone { padding-block: clamp(48px, 7vw, 96px); position: relative; }
.zone--dark { background: var(--indigo-950); color: var(--cool-white); }
.zone--panel { background: var(--indigo-800); color: var(--cool-white); }
.zone--paper { background: var(--paper); color: var(--charcoal); }
.zone--warm { background: var(--warm-gray); color: var(--charcoal); }
.zone--cool { background: var(--cool-white); color: var(--indigo-950); }

.grid-lines {
  background-image:
    linear-gradient(to right, rgba(70, 201, 174, 0.10) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(70, 201, 174, 0.10) 1px, transparent 1px);
  background-size: 56px 56px;
  background-position: center top;
}

/* ---------- 文字工具 ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--celadon);
}
.eyebrow::before {
  content: "";
  width: 22px;
  height: 2px;
  background: currentColor;
  flex: none;
}

.note-vertical {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.32em;
  color: rgba(70, 201, 174, 0.75);
}

.lead {
  font-size: clamp(1rem, 1.35vw, 1.15rem);
  line-height: 1.8;
  color: var(--muted);
}

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

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px 32px;
  margin-bottom: clamp(24px, 3vw, 40px);
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 22px;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 1.2;
  border: 2px solid currentColor;
  transition: transform 0.15s ease, box-shadow 0.15s ease,
              background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}
.btn--amber {
  background: var(--amber);
  color: var(--charcoal);
  border-color: var(--charcoal);
  box-shadow: 5px 5px 0 var(--celadon-deep);
}
.btn--amber:hover {
  background: var(--amber-soft);
  transform: translate(-2px, -2px);
  box-shadow: 7px 7px 0 var(--celadon-deep);
}
.btn--ghost {
  background: transparent;
  color: var(--cool-white);
  border-color: rgba(242, 179, 61, 0.55);
}
.btn--ghost:hover {
  color: var(--amber);
  border-color: var(--amber);
}

/* ---------- 面板 ---------- */
.panel {
  position: relative;
  padding: clamp(20px, 3vw, 32px);
  background: var(--indigo-800);
  color: var(--cool-white);
  border: 2px solid var(--line-strong);
  box-shadow: var(--shadow-hard);
}
.panel--warm {
  background: var(--warm-gray);
  color: var(--charcoal);
  border-color: rgba(23, 28, 38, 0.85);
  box-shadow: 8px 8px 0 rgba(23, 28, 38, 0.22);
}
.panel--cool {
  background: var(--cool-white);
  color: var(--indigo-950);
  border-color: rgba(7, 19, 38, 0.85);
  box-shadow: 8px 8px 0 rgba(7, 19, 38, 0.22);
}
.panel--amber {
  background: var(--amber);
  color: var(--charcoal);
  border-color: var(--charcoal);
  box-shadow: 8px 8px 0 var(--celadon-deep);
}

/* ---------- 标签与状态 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border: 1px solid currentColor;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  line-height: 1.4;
}

.status-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--celadon);
  box-shadow: 0 0 0 3px rgba(70, 201, 174, 0.20);
  flex: none;
}

/* ---------- 面包屑 ---------- */
.breadcrumb { padding-block: 18px 0; }
.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
}
.breadcrumb__item {
  display: flex;
  align-items: center;
  gap: 8px;
  color: rgba(242, 246, 250, 0.55);
}
.breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  color: var(--amber);
  opacity: 0.8;
}
.breadcrumb__link {
  color: var(--celadon);
  transition: color 0.15s ease;
}
.breadcrumb__link:hover { color: var(--amber); }

/* ---------- 图片容器基础（页面阶段放图） ---------- */
.media-frame {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: var(--media-ratio, 16 / 10);
  overflow: hidden;
  background: var(--indigo-800);
  border: 2px solid var(--line-strong);
}
.media-frame > img,
.media-frame > picture > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.media-frame--warm {
  background: var(--warm-gray);
  border-color: rgba(23, 28, 38, 0.35);
}
.media-frame--cool {
  background: var(--cool-white);
  border-color: rgba(7, 19, 38, 0.25);
}
.media-frame--paper {
  background: var(--paper);
  border-color: rgba(7, 19, 38, 0.18);
}
.media-frame--grid {
  background-image:
    linear-gradient(to right, rgba(70, 201, 174, 0.14) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(70, 201, 174, 0.14) 1px, transparent 1px);
  background-size: 32px 32px;
  background-position: center;
}

/* =========================================================
   头部：侧边轨道导航
   ========================================================= */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 100;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 14px;
  width: var(--rail-w);
  padding: 16px 8px 18px;
  background:
    linear-gradient(180deg, rgba(70, 201, 174, 0.09), transparent 34%),
    var(--indigo-950);
  border-right: 1px solid var(--line-strong);
}

.site-header::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 3px;
  height: 46%;
  background: linear-gradient(180deg, var(--amber), rgba(242, 179, 61, 0));
  opacity: 0.45;
  pointer-events: none;
}

.site-header::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 3px;
  height: var(--scroll-progress);
  background: linear-gradient(180deg, var(--celadon), var(--celadon-deep));
  transition: height 0.12s linear;
  pointer-events: none;
}

/* 品牌块 */
.rail-brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 2px 0 12px;
  border-bottom: 1px solid var(--line);
}
.rail-brand__mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  background: var(--amber);
  color: var(--charcoal);
  font-family: var(--font-mono);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.04em;
  border: 2px solid var(--charcoal);
  box-shadow: 3px 3px 0 var(--celadon-deep);
  transition: background-color 0.15s ease, box-shadow 0.15s ease, transform 0.15s ease;
}
.rail-brand:hover .rail-brand__mark {
  background: var(--amber-soft);
  transform: translate(-1px, -1px);
  box-shadow: 4px 4px 0 var(--celadon-deep);
}
.rail-brand__name {
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--cool-white);
  white-space: nowrap;
}

/* 移动端抽屉按钮（桌面隐藏） */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 9px 14px;
  background: transparent;
  color: var(--amber);
  border: 2px solid var(--amber);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}
.nav-toggle__lines {
  display: flex;
  flex-direction: column;
  gap: 3px;
  width: 16px;
  flex: none;
}
.nav-toggle__lines span {
  display: block;
  height: 2px;
  width: 100%;
  background: currentColor;
}
.nav-toggle__text { line-height: 1; }
.nav-toggle[aria-expanded="true"] {
  background: var(--amber);
  color: var(--charcoal);
  border-color: var(--charcoal);
}

/* 轨道导航 */
.rail-nav {
  display: flex;
  flex-direction: column;
  flex: 1 1 auto;
  min-height: 0;
  gap: 14px;
  overflow-y: auto;
  overflow-x: hidden;
  scrollbar-width: none;
}
.rail-nav::-webkit-scrollbar { width: 0; height: 0; }

.rail-nav__list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.rail-nav__item { display: block; }

.rail-nav__link {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 11px 4px;
  color: rgba(242, 246, 250, 0.72);
  border-left: 2px solid transparent;
  transition: color 0.15s ease, background-color 0.15s ease, border-color 0.15s ease;
}
.rail-nav__link:hover {
  color: var(--amber);
  background: rgba(70, 201, 174, 0.10);
  border-left-color: var(--celadon);
}
.rail-nav__idx {
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.10em;
  line-height: 1;
  color: rgba(70, 201, 174, 0.72);
}
.rail-nav__label {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-family: var(--font-display);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.10em;
  line-height: 1.1;
}
.rail-nav__link[aria-current="page"] {
  background: var(--amber);
  color: var(--charcoal);
  border-left-color: var(--charcoal);
}
.rail-nav__link[aria-current="page"] .rail-nav__idx {
  color: rgba(23, 28, 38, 0.62);
}

/* 访客入口标签 */
.rail-entry {
  display: block;
  margin-top: auto;
  padding: 11px 2px;
  background: var(--amber);
  color: var(--charcoal);
  font-family: var(--font-display);
  font-size: 12.5px;
  font-weight: 800;
  letter-spacing: 0.05em;
  line-height: 1.3;
  text-align: center;
  border: 2px solid var(--charcoal);
  box-shadow: 4px 4px 0 var(--celadon-deep);
  transition: background-color 0.15s ease, box-shadow 0.15s ease, transform 0.15s ease;
}
.rail-entry:hover {
  background: var(--amber-soft);
  transform: translate(-1px, -1px);
  box-shadow: 5px 5px 0 var(--celadon-deep);
}

/* =========================================================
   页脚
   ========================================================= */
.site-footer {
  position: relative;
  margin-top: clamp(56px, 8vw, 110px);
  padding-top: clamp(40px, 6vw, 72px);
  background: var(--indigo-950);
  color: var(--cool-white);
  border-top: 2px solid var(--line-strong);
  overflow: hidden;
}
.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 160px;
  height: 3px;
  background: var(--amber);
}

.footer__top {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.95fr) minmax(0, 1.15fr);
  gap: clamp(24px, 4vw, 56px);
  padding-bottom: clamp(28px, 4vw, 48px);
}

.footer__wordmark {
  font-family: var(--font-display);
  font-size: clamp(26px, 3.6vw, 44px);
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1.05;
  color: var(--amber);
  margin-bottom: 10px;
}
.footer__brandline {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--muted);
  margin-bottom: 18px;
}
.footer__badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border: 1px solid var(--line-strong);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  color: var(--celadon);
}

.footer__links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(18px, 3vw, 36px);
}

.footer__coltitle {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--celadon);
  padding-bottom: 10px;
  margin-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.footer__list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.footer__link {
  display: inline-block;
  font-size: 14.5px;
  color: rgba(242, 246, 250, 0.78);
  border-bottom: 1px solid transparent;
  transition: color 0.15s ease, border-color 0.15s ease;
}
.footer__link:hover {
  color: var(--amber);
  border-bottom-color: var(--amber);
}

.footer__address {
  display: grid;
  gap: 10px;
  font-size: 13.5px;
  line-height: 1.65;
}
.footer__row {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
}
.footer__key {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  line-height: 1.9;
  color: rgba(70, 201, 174, 0.82);
}
.footer__val {
  color: rgba(242, 246, 250, 0.80);
  overflow-wrap: anywhere;
}

.footer__base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 26px;
  padding-block: 16px 22px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.10em;
  color: var(--muted);
}
.footer__copy { margin: 0; }
.footer__icp { margin: 0; color: rgba(242, 246, 250, 0.72); }
.footer__note { margin: 0; }
.footer__year { color: var(--celadon); }

/* =========================================================
   响应式
   ========================================================= */
@media (max-width: 1024px) {
  .grid { grid-template-columns: repeat(8, minmax(0, 1fr)); }
  .col-3, .col-4, .col-5, .col-6, .col-7, .col-8 { grid-column: span 8; }

  .footer__top {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }
  .footer__contact { grid-column: 1 / -1; }
}

@media (max-width: 900px) {
  body { padding-left: 0; padding-top: var(--topbar-h); }

  #main-content { scroll-margin-top: calc(var(--topbar-h) + 8px); }

  .site-header {
    top: 0;
    left: 0;
    right: 0;
    bottom: auto;
    width: 100%;
    height: var(--topbar-h);
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 0 14px;
    border-right: 0;
    border-bottom: 1px solid var(--line-strong);
    background: var(--indigo-950);
  }
  .site-header::before {
    top: auto;
    bottom: -1px;
    right: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, var(--amber), rgba(242, 179, 61, 0));
    opacity: 0.5;
  }
  .site-header::after {
    top: auto;
    bottom: 0;
    left: 0;
    width: var(--scroll-progress);
    height: 3px;
    background: linear-gradient(90deg, var(--celadon), var(--celadon-deep));
    transition: width 0.12s linear;
  }

  .rail-brand {
    flex-direction: row;
    align-items: center;
    gap: 10px;
    padding: 0;
    border-bottom: 0;
  }
  .rail-brand__mark { width: 34px; height: 34px; font-size: 14px; }
  .rail-brand__name { font-size: 12px; letter-spacing: 0.10em; }

  .nav-toggle { display: flex; }

  .rail-nav {
    position: fixed;
    top: var(--topbar-h);
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 90;
    display: flex;
    flex-direction: column;
    gap: 18px;
    padding: 20px 18px 32px;
    background: var(--indigo-950);
    border-top: 1px solid var(--line-strong);
    overflow-y: auto;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    pointer-events: none;
    transition: opacity 0.18s ease, transform 0.18s ease, visibility 0.18s;
  }
  .rail-nav[data-open] {
    opacity: 1;
    visibility: visible;
    transform: none;
    pointer-events: auto;
  }

  .rail-nav__list { gap: 0; }
  .rail-nav__link {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    padding: 15px 10px;
    border-left: 0;
    border-bottom: 1px solid var(--line);
  }
  .rail-nav__link:hover {
    background: rgba(70, 201, 174, 0.08);
    border-left-color: transparent;
  }
  .rail-nav__label {
    writing-mode: horizontal-tb;
    font-size: 19px;
    letter-spacing: 0.02em;
  }
  .rail-nav__idx { font-size: 11px; letter-spacing: 0.18em; }
  .rail-nav__link[aria-current="page"] { border-bottom-color: var(--amber); }

  .rail-entry {
    margin-top: auto;
    padding: 16px 10px;
    font-size: 15px;
    letter-spacing: 0.14em;
  }

  .footer__top { grid-template-columns: minmax(0, 1fr); }
  .footer__contact { grid-column: auto; }
}

@media (max-width: 720px) {
  .grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .col-3, .col-4, .col-5, .col-6, .col-7, .col-8, .col-12 { grid-column: span 4; }

  .footer__links { grid-template-columns: minmax(0, 1fr); }
  .footer__base { font-size: 10.5px; letter-spacing: 0.06em; }
}

@media (min-width: 901px) and (max-height: 820px) {
  .rail-nav__label { font-size: 11.5px; letter-spacing: 0.06em; }
  .rail-nav__link { padding: 8px 4px; gap: 4px; }
  .rail-brand__name { font-size: 10px; }
  .rail-entry { padding: 9px 2px; font-size: 11.5px; }
}

/* ---------- 动效降级 ---------- */
@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;
  }
  .rail-nav,
  .rail-nav[data-open] { transform: none; }
  .btn--amber:hover,
  .rail-entry:hover,
  .rail-brand:hover .rail-brand__mark { transform: none; }
}