/* ==========================================================================
   c7南宮看台 · 共享样式 /assets/site.css
   工业灰 · 釉青 · 暖铜 · 荧光青绿 —— 仓储档案与电气图纸的秩序感
   ========================================================================== */

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

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

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

ul, ol { list-style: none; }

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

button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }

a { color: inherit; text-decoration: none; }

table { border-collapse: collapse; width: 100%; }

[hidden] { display: none !important; }

/* ---------- 变量 ---------- */
:root {
  --c7-gray: #3A3F44;
  --c7-ink: #1C2124;
  --c7-glaze: #1F6F73;
  --c7-glaze-2: #7FBFBF;
  --c7-copper: #B4703A;
  --c7-sand: #E3C79E;
  --c7-neon: #3BE8B0;
  --c7-paper: #F4F1EA;
  --c7-red: #C0392B;

  --c7-line: rgba(244, 241, 234, 0.16);
  --c7-line-strong: rgba(244, 241, 234, 0.32);
  --c7-line-dark: rgba(28, 33, 36, 0.16);

  --c7-shell: 1320px;
  --c7-gutter: clamp(16px, 3vw, 44px);
  --c7-radius: 6px;
  --c7-radius-lg: 12px;

  --c7-font-display: "Archivo Narrow", "Noto Sans SC", "Source Han Sans CN", "PingFang SC", "Microsoft YaHei", sans-serif;
  --c7-font-mono: "JetBrains Mono", "Sarasa Mono SC", "Cascadia Mono", "SFMono-Regular", Consolas, "Noto Sans Mono CJK SC", "Courier New", monospace;

  --c7-ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --c7-progress: 0;
}

/* ---------- 基础排版 ---------- */
body {
  min-height: 100vh;
  font-family: var(--c7-font-mono);
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--c7-paper);
  background-color: var(--c7-gray);
  background-image:
    linear-gradient(rgba(127, 191, 191, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(127, 191, 191, 0.055) 1px, transparent 1px);
  background-size: 48px 48px, 48px 48px;
  letter-spacing: 0.01em;
}

h1, h2, h3, h4 {
  font-family: var(--c7-font-display);
  font-weight: 700;
  font-stretch: condensed;
  line-height: 1.15;
  letter-spacing: 0.02em;
  text-wrap: pretty;
}

p { text-wrap: pretty; }

strong, b { color: var(--c7-sand); font-weight: 700; }

:focus-visible {
  outline: 2px solid var(--c7-neon);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ---------- 工具类 ---------- */
.c7-shell {
  width: 100%;
  max-width: var(--c7-shell);
  margin-inline: auto;
  padding-inline: var(--c7-gutter);
}

.c7-sr {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.c7-skip {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 200;
  transform: translateY(-180%);
  padding: 12px 20px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--c7-ink);
  background: var(--c7-neon);
  border-radius: 2px;
  transition: transform 0.2s var(--c7-ease);
}

.c7-skip:focus { transform: translateY(0); }

.c7-reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s var(--c7-ease), transform 0.5s var(--c7-ease);
}

.c7-reveal.is-in { opacity: 1; transform: none; }

/* ---------- 头部 ---------- */
.c7-header {
  position: sticky;
  top: 0;
  z-index: 90;
}

.c7-header__utility {
  background: var(--c7-ink);
  border-bottom: 1px solid rgba(127, 191, 191, 0.2);
}

.c7-header__utility-inner {
  display: flex;
  align-items: center;
  gap: clamp(12px, 2.2vw, 32px);
  min-height: 46px;
  padding-block: 7px;
  flex-wrap: wrap;
}

.c7-header__tagline {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--c7-sand);
  line-height: 1.5;
}

.c7-header__meta {
  margin-inline-start: auto;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: rgba(244, 241, 234, 0.58);
  line-height: 1.5;
}

.c7-header__cta {
  flex: 0 0 auto;
  padding: 8px 15px;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--c7-ink);
  background: var(--c7-neon);
  border: 1px solid var(--c7-neon);
  border-radius: 2px;
  white-space: nowrap;
  transition: background 0.2s var(--c7-ease), color 0.2s var(--c7-ease);
}

.c7-header__cta:hover {
  background: transparent;
  color: var(--c7-neon);
}

.c7-navtoggle {
  display: none;
  position: relative;
  flex: 0 0 auto;
  width: 44px;
  height: 36px;
  margin-inline-start: auto;
  border: 1px solid rgba(127, 191, 191, 0.5);
  border-radius: 3px;
}

.c7-navtoggle__bar {
  position: absolute;
  left: 11px;
  right: 11px;
  height: 2px;
  background: var(--c7-paper);
  transition: transform 0.24s var(--c7-ease), opacity 0.18s linear;
}

.c7-navtoggle__bar:nth-of-type(1) { top: 11px; }
.c7-navtoggle__bar:nth-of-type(2) { top: 17px; }
.c7-navtoggle__bar:nth-of-type(3) { top: 23px; }

.c7-navtoggle[aria-expanded="true"] { border-color: var(--c7-neon); }
.c7-navtoggle[aria-expanded="true"] .c7-navtoggle__bar:nth-of-type(1) { transform: translateY(6px) rotate(45deg); background: var(--c7-neon); }
.c7-navtoggle[aria-expanded="true"] .c7-navtoggle__bar:nth-of-type(2) { opacity: 0; }
.c7-navtoggle[aria-expanded="true"] .c7-navtoggle__bar:nth-of-type(3) { transform: translateY(-6px) rotate(-45deg); background: var(--c7-neon); }

.c7-header__bar {
  background: var(--c7-gray);
  border-bottom: 2px solid var(--c7-copper);
}

.c7-header__bar-inner {
  display: flex;
  align-items: center;
  gap: clamp(14px, 2.6vw, 44px);
  min-height: 80px;
  padding-block: 14px;
}

.c7-header__bar-inner::before {
  content: "";
  flex: 0 0 auto;
  width: 3px;
  height: 46px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--c7-copper), var(--c7-glaze));
}

.c7-brand {
  display: flex;
  align-items: center;
  gap: 13px;
  flex: 0 0 auto;
}

.c7-brand__mark {
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  font-family: var(--c7-font-display);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 0.04em;
  color: var(--c7-sand);
  background: linear-gradient(155deg, rgba(180, 112, 58, 0.34), rgba(31, 111, 115, 0.42));
  border: 1px solid var(--c7-copper);
  border-radius: 10px 10px 10px 2px;
}

.c7-brand__text { display: flex; flex-direction: column; gap: 2px; }

.c7-brand__name {
  font-family: var(--c7-font-display);
  font-weight: 700;
  font-stretch: condensed;
  font-size: clamp(20px, 2.3vw, 26px);
  letter-spacing: 0.06em;
  line-height: 1.1;
  color: var(--c7-paper);
}

.c7-brand__sub {
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--c7-glaze-2);
  line-height: 1.3;
}

.c7-nav { margin-inline-start: auto; }

.c7-nav__list {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: clamp(4px, 1.3vw, 20px);
}

.c7-nav__item { display: flex; }

.c7-nav__link {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 7px;
  padding: 10px 4px;
  font-size: 13px;
  letter-spacing: 0.05em;
  color: rgba(244, 241, 234, 0.78);
  transition: color 0.2s var(--c7-ease);
}

.c7-nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 3px;
  height: 2px;
  background: var(--c7-neon);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.24s var(--c7-ease);
}

.c7-nav__index {
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--c7-copper);
}

.c7-nav__label { line-height: 1.4; }

.c7-nav__link:hover { color: var(--c7-paper); }
.c7-nav__link:hover::after { transform: scaleX(1); }

.c7-nav__link[aria-current="page"] { color: var(--c7-neon); }
.c7-nav__link[aria-current="page"] .c7-nav__index { color: var(--c7-neon); }
.c7-nav__link[aria-current="page"]::after {
  transform: scaleX(1);
  background: var(--c7-copper);
}

.c7-header__ruler {
  height: 8px;
  background-image:
    repeating-linear-gradient(90deg, rgba(244, 241, 234, 0.32) 0 1px, transparent 1px 16px),
    linear-gradient(90deg, var(--c7-glaze), var(--c7-glaze));
}

/* ---------- 页脚 ---------- */
.c7-footer {
  margin-top: clamp(40px, 6vw, 96px);
  background: var(--c7-ink);
  border-top: 2px solid var(--c7-glaze);
  color: rgba(244, 241, 234, 0.78);
}

.c7-footer__grid {
  display: grid;
  grid-template-columns: minmax(0, 4fr) repeat(3, minmax(0, 2fr));
  gap: clamp(22px, 3vw, 52px);
  padding-block: clamp(32px, 5vw, 68px);
}

.c7-footer__brand { display: grid; justify-items: start; gap: 12px; }

.c7-footer__name {
  font-family: var(--c7-font-display);
  font-weight: 700;
  font-stretch: condensed;
  font-size: clamp(22px, 2.4vw, 28px);
  letter-spacing: 0.05em;
  color: var(--c7-paper);
  line-height: 1.1;
}

.c7-footer__desc {
  max-width: 30ch;
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: rgba(244, 241, 234, 0.62);
}

.c7-footer__stamp {
  margin-top: 4px;
  padding: 6px 12px;
  font-size: 10.5px;
  letter-spacing: 0.2em;
  color: var(--c7-sand);
  border: 1px solid var(--c7-copper);
  border-radius: 2px;
  transform: rotate(-1.4deg);
}

.c7-footer__col { display: flex; flex-direction: column; gap: 12px; }

.c7-footer__coltitle {
  font-family: var(--c7-font-mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--c7-glaze-2);
  padding-bottom: 10px;
  border-bottom: 1px solid var(--c7-line);
}

.c7-footer__links { display: grid; gap: 9px; }

.c7-footer__link {
  position: relative;
  display: inline-block;
  font-size: 13px;
  letter-spacing: 0.05em;
  color: rgba(244, 241, 234, 0.76);
  transition: color 0.2s var(--c7-ease);
}

.c7-footer__link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 100%;
  height: 1px;
  background: var(--c7-neon);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.24s var(--c7-ease);
}

.c7-footer__link:hover { color: var(--c7-neon); }
.c7-footer__link:hover::after { transform: scaleX(1); }

.c7-footer__contact {
  display: grid;
  gap: 8px;
  padding-block: clamp(20px, 3vw, 30px);
  border-top: 1px solid var(--c7-line);
  font-size: 12.5px;
  letter-spacing: 0.05em;
}

.c7-footer__contactline {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
  color: rgba(244, 241, 234, 0.72);
}

.c7-footer__label {
  flex: 0 0 auto;
  min-width: 72px;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--c7-copper);
}

.c7-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 26px;
  padding-block: 18px 26px;
  border-top: 1px solid var(--c7-line);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: rgba(244, 241, 234, 0.55);
}

.c7-footer__copy { color: rgba(244, 241, 234, 0.72); }

.c7-footer__filing {
  padding: 3px 10px;
  color: var(--c7-sand);
  border: 1px solid rgba(180, 112, 58, 0.6);
  border-radius: 2px;
}

.c7-footer__region { margin-inline-start: auto; max-width: 52ch; }

/* ---------- 主内容与栅格 ---------- */
.c7-main { display: block; padding-block: clamp(24px, 4vw, 64px); }

.c7-layout {
  display: grid;
  grid-template-columns: minmax(150px, 2fr) minmax(0, 7fr) minmax(170px, 3fr);
  gap: clamp(20px, 2.6vw, 44px);
  align-items: start;
}

.c7-content { min-width: 0; }

.c7-aside { min-width: 0; font-size: 13px; }

.c7-pagehead {
  padding-block: clamp(20px, 3vw, 40px) clamp(16px, 2.4vw, 28px);
  border-bottom: 1px solid var(--c7-line);
  margin-bottom: clamp(20px, 3vw, 40px);
}

.c7-title {
  font-size: clamp(34px, 6vw, 74px);
  line-height: 1.02;
  letter-spacing: 0.01em;
  color: var(--c7-paper);
}

.c7-lede {
  margin-top: 16px;
  max-width: 62ch;
  font-size: 14.5px;
  line-height: 1.9;
  color: rgba(244, 241, 234, 0.74);
}

.c7-prose { max-width: 68ch; }
.c7-prose p + p { margin-top: 1.05em; }
.c7-prose h2 {
  margin-top: 2.2em;
  margin-bottom: 0.7em;
  font-size: clamp(22px, 3vw, 32px);
}
.c7-prose h3 {
  margin-top: 1.8em;
  margin-bottom: 0.55em;
  font-size: clamp(17px, 2vw, 21px);
  color: var(--c7-sand);
}
.c7-prose ul, .c7-prose ol {
  margin-block: 1em;
  padding-inline-start: 1.4em;
  list-style: disc;
}
.c7-prose li { margin-block: 0.35em; }
.c7-prose a {
  color: var(--c7-neon);
  border-bottom: 1px solid rgba(59, 232, 176, 0.4);
}
.c7-prose a:hover { border-bottom-color: var(--c7-neon); }

/* ---------- 侧边轨道 ---------- */
.c7-rail {
  position: sticky;
  top: 128px;
  align-self: start;
  padding: 16px 14px;
  background: rgba(28, 33, 36, 0.42);
  border: 1px solid var(--c7-line);
  border-radius: var(--c7-radius);
  font-size: 11.5px;
}

.c7-rail__title {
  padding-bottom: 10px;
  border-bottom: 1px solid var(--c7-line);
  font-size: 10.5px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--c7-glaze-2);
}

.c7-rail__list { display: grid; gap: 2px; margin-top: 10px; }

.c7-rail__link {
  display: flex;
  gap: 10px;
  padding: 7px 8px 7px 12px;
  color: rgba(244, 241, 234, 0.66);
  border-left: 1px solid rgba(244, 241, 234, 0.18);
  transition: color 0.2s var(--c7-ease), border-color 0.2s var(--c7-ease), background 0.2s var(--c7-ease);
}

.c7-rail__link:hover { color: var(--c7-neon); border-left-color: var(--c7-neon); }

.c7-rail__link[aria-current="true"] {
  color: var(--c7-neon);
  border-left-color: var(--c7-neon);
  background: rgba(59, 232, 176, 0.07);
}

.c7-rail__num { color: var(--c7-copper); }

/* ---------- 章节标题条 ---------- */
.c7-sechead {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 8px 16px;
  padding-bottom: 12px;
  margin-bottom: clamp(16px, 2.2vw, 26px);
  border-bottom: 1px solid var(--c7-line);
}

.c7-sechead__idx {
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--c7-copper);
}

.c7-sechead__title {
  font-size: clamp(21px, 3vw, 33px);
  color: var(--c7-paper);
}

/* ---------- 按钮 ---------- */
.c7-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 22px;
  font-family: var(--c7-font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--c7-sand);
  background: transparent;
  border: 1px solid var(--c7-copper);
  border-radius: 2px;
  transition: background 0.2s var(--c7-ease), color 0.2s var(--c7-ease), border-color 0.2s var(--c7-ease);
}

.c7-btn:hover {
  color: var(--c7-neon);
  border-color: var(--c7-neon);
  background: rgba(59, 232, 176, 0.08);
}

.c7-btn--solid {
  color: var(--c7-paper);
  background: var(--c7-glaze);
  border-color: var(--c7-glaze);
}

.c7-btn--solid:hover {
  color: var(--c7-ink);
  background: var(--c7-neon);
  border-color: var(--c7-neon);
}

.c7-btn--copper {
  color: var(--c7-ink);
  background: var(--c7-copper);
  border-color: var(--c7-copper);
}

.c7-btn--copper:hover { color: var(--c7-ink); background: var(--c7-sand); border-color: var(--c7-sand); }

/* ---------- 面包屑 ---------- */
.c7-crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 18px;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: rgba(244, 241, 234, 0.5);
}

.c7-crumbs__link { color: rgba(244, 241, 234, 0.72); }
.c7-crumbs__link:hover { color: var(--c7-neon); }
.c7-crumbs__link[aria-current="page"] { color: var(--c7-copper); }
.c7-crumbs__sep { color: rgba(127, 191, 191, 0.6); }

/* ---------- 抽屉 ---------- */
.c7-drawer {
  background: rgba(28, 33, 36, 0.6);
  border: 1px solid var(--c7-line);
  border-radius: var(--c7-radius);
  overflow: hidden;
}

.c7-drawer + .c7-drawer { margin-top: 12px; }

.c7-drawer[data-open] { border-color: rgba(59, 232, 176, 0.42); }

.c7-drawer__head {
  display: flex;
  align-items: center;
  gap: 14px;
  width: 100%;
  padding: 16px 18px;
  text-align: left;
  font-family: var(--c7-font-display);
  font-weight: 700;
  font-size: 16px;
  letter-spacing: 0.04em;
  color: var(--c7-paper);
  transition: color 0.2s var(--c7-ease);
}

.c7-drawer__head:hover { color: var(--c7-neon); }

.c7-drawer__idx {
  font-family: var(--c7-font-mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.18em;
  color: var(--c7-copper);
}

.c7-drawer__sign {
  position: relative;
  flex: 0 0 auto;
  margin-inline-start: auto;
  width: 14px;
  height: 14px;
}

.c7-drawer__sign::before,
.c7-drawer__sign::after {
  content: "";
  position: absolute;
  background: currentColor;
  transition: transform 0.24s var(--c7-ease);
}

.c7-drawer__sign::before { left: 0; right: 0; top: 6px; height: 2px; }
.c7-drawer__sign::after { top: 0; bottom: 0; left: 6px; width: 2px; }

.c7-drawer[data-open] .c7-drawer__sign::after { transform: scaleY(0); }

.c7-drawer__panel {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.24s ease-out;
}

.c7-drawer__inner {
  padding: 0 18px 20px;
  font-size: 14px;
  line-height: 1.85;
  color: rgba(244, 241, 234, 0.82);
}

.c7-drawer__inner p + p { margin-top: 0.8em; }

/* ---------- 规格表 ---------- */
.c7-table {
  width: 100%;
  font-size: 13px;
  border: 1px solid var(--c7-line);
  border-radius: var(--c7-radius);
  overflow: hidden;
}

.c7-table caption {
  padding: 10px 0;
  text-align: left;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--c7-glaze-2);
}

.c7-table th,
.c7-table td {
  padding: 11px 14px;
  text-align: left;
  border-bottom: 1px solid var(--c7-line);
  vertical-align: top;
}

.c7-table thead th {
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.18em;
  color: var(--c7-sand);
  background: rgba(31, 111, 115, 0.28);
}

.c7-table tbody tr:nth-child(even) { background: rgba(227, 199, 158, 0.06); }
.c7-table tbody tr:last-child td { border-bottom: 0; }

.c7-table__num { color: var(--c7-copper); white-space: nowrap; }

/* ---------- 图片容器 ---------- */
.c7-figure { margin: 0; }

.c7-figure__frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: linear-gradient(140deg, var(--c7-glaze), var(--c7-ink));
  border: 1px solid var(--c7-line);
  border-radius: var(--c7-radius-lg) var(--c7-radius-lg) var(--c7-radius-lg) 2px;
}

.c7-figure__frame > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.c7-figure__frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(244, 241, 234, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(244, 241, 234, 0.07) 1px, transparent 1px);
  background-size: 32px 32px, 32px 32px;
}

.c7-figure__frame--wide { aspect-ratio: 21 / 9; }
.c7-figure__frame--tall { aspect-ratio: 3 / 4; }
.c7-figure__frame--square { aspect-ratio: 1 / 1; }

.c7-figure__tag {
  position: absolute;
  z-index: 2;
  top: 0;
  left: 0;
  padding: 7px 14px;
  font-size: 10.5px;
  letter-spacing: 0.2em;
  color: var(--c7-ink);
  background: var(--c7-neon);
  clip-path: polygon(0 0, 100% 0, calc(100% - 12px) 100%, 0 100%);
}

.c7-figure__cap {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 12px;
  margin-top: 10px;
  font-size: 11.5px;
  letter-spacing: 0.12em;
  color: rgba(244, 241, 234, 0.6);
}

.c7-figure__cap b { font-weight: 400; color: var(--c7-copper); }

/* ---------- 铭牌数字 ---------- */
.c7-stat { display: grid; gap: 4px; }

.c7-stat__num {
  font-family: var(--c7-font-display);
  font-size: clamp(40px, 7vw, 88px);
  font-weight: 700;
  font-stretch: condensed;
  line-height: 1;
  color: var(--c7-copper);
  font-variant-numeric: tabular-nums;
}

.c7-stat__label {
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(244, 241, 234, 0.6);
}

/* ---------- 批注 / 印章 / 刻度 / 标签 ---------- */
.c7-note {
  position: relative;
  margin-block: 18px;
  padding: 12px 16px 12px 18px;
  font-size: 13.5px;
  line-height: 1.8;
  color: #F2DED9;
  background: rgba(192, 57, 43, 0.1);
  border-left: 2px solid var(--c7-red);
  border-radius: 0 var(--c7-radius) var(--c7-radius) 0;
  transform: rotate(-0.35deg);
}

.c7-stamp {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  font-size: 10.5px;
  letter-spacing: 0.2em;
  color: var(--c7-red);
  border: 1px solid var(--c7-red);
  border-radius: 2px;
  transform: rotate(-2deg);
}

.c7-ruler {
  height: 10px;
  margin-block: 22px;
  background-image: repeating-linear-gradient(90deg, rgba(244, 241, 234, 0.34) 0 1px, transparent 1px 14px);
  border-top: 1px solid var(--c7-line);
}

.c7-chip {
  display: inline-flex;
  align-items: center;
  padding: 5px 11px;
  font-size: 10.5px;
  letter-spacing: 0.16em;
  color: var(--c7-glaze-2);
  border: 1px solid rgba(127, 191, 191, 0.5);
  border-radius: 999px;
}

.c7-chip[aria-pressed="true"] {
  color: var(--c7-ink);
  background: var(--c7-neon);
  border-color: var(--c7-neon);
}

.c7-chip:hover { border-color: var(--c7-neon); color: var(--c7-neon); }
.c7-chip[aria-pressed="true"]:hover { color: var(--c7-ink); }

/* ---------- 返回顶部刻度 ---------- */
.c7-totop {
  position: fixed;
  right: 16px;
  bottom: 16px;
  z-index: 95;
  display: grid;
  justify-items: center;
  gap: 7px;
  width: 56px;
  padding: 11px 9px;
  background: rgba(28, 33, 36, 0.94);
  border: 1px solid rgba(127, 191, 191, 0.5);
  border-radius: 4px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity 0.24s var(--c7-ease), transform 0.24s var(--c7-ease), visibility 0.24s;
}

.c7-totop[data-visible] {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.c7-totop:hover { border-color: var(--c7-neon); }

.c7-totop__scale {
  position: relative;
  width: 100%;
  height: 3px;
  overflow: hidden;
  background: rgba(244, 241, 234, 0.18);
}

.c7-totop__fill {
  position: absolute;
  inset: 0;
  background: var(--c7-neon);
  transform: scaleX(var(--c7-progress));
  transform-origin: left center;
}

.c7-totop__label {
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--c7-paper);
  line-height: 1.2;
  text-align: center;
}

/* ---------- 响应式 ---------- */
@media (max-width: 1200px) {
  .c7-layout { grid-template-columns: minmax(140px, 2fr) minmax(0, 8fr); }
  .c7-aside { grid-column: 1 / -1; }
}

@media (max-width: 1024px) {
  .c7-navtoggle { display: block; }

  .c7-header__meta { display: none; }

  .c7-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    margin: 0;
    padding: 0 var(--c7-gutter);
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    background: var(--c7-ink);
    border-bottom: 2px solid var(--c7-copper);
    transition: max-height 0.28s var(--c7-ease), opacity 0.22s linear, visibility 0.28s;
  }

  .c7-nav[data-open] {
    max-height: 72vh;
    overflow-y: auto;
    opacity: 1;
    visibility: visible;
    padding: 10px var(--c7-gutter) 22px;
  }

  .c7-nav__list { flex-direction: column; align-items: stretch; gap: 0; }

  .c7-nav__item { display: block; }

  .c7-nav__link {
    padding: 14px 2px;
    font-size: 15px;
    border-bottom: 1px solid rgba(244, 241, 234, 0.12);
  }

  .c7-nav__link::after { display: none; }

  .c7-nav__link[aria-current="page"] { background: rgba(59, 232, 176, 0.07); }

  .c7-layout { grid-template-columns: minmax(0, 1fr); }

  .c7-rail { position: static; padding: 12px 12px 6px; }

  .c7-rail__list {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    padding-bottom: 8px;
    scrollbar-width: thin;
  }

  .c7-rail__link {
    padding: 8px 12px;
    white-space: nowrap;
    border-left: 0;
    border-bottom: 2px solid rgba(244, 241, 234, 0.18);
    border-radius: 2px 2px 0 0;
  }

  .c7-rail__link[aria-current="true"] { border-bottom-color: var(--c7-neon); }
}

@media (max-width: 860px) {
  .c7-footer__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .c7-footer__brand { grid-column: 1 / -1; }
  .c7-footer__region { margin-inline-start: 0; }
}

@media (max-width: 640px) {
  body { font-size: 15px; }

  .c7-header__utility-inner { gap: 10px; min-height: 42px; }
  .c7-header__tagline { font-size: 11px; letter-spacing: 0.1em; }
  .c7-header__cta { order: 3; padding: 7px 12px; }
  .c7-navtoggle { order: 2; }
  .c7-brand__sub { display: none; }
  .c7-header__bar-inner::before { display: none; }
  .c7-footer__grid { grid-template-columns: minmax(0, 1fr); }
  .c7-table th, .c7-table td { padding: 9px 10px; }
  .c7-totop { right: 12px; bottom: 12px; }
}

/* ---------- 焦点与动效偏好 ---------- */
@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;
  }

  .c7-reveal { opacity: 1; transform: none; }
  .c7-totop { transform: none; }
  .c7-nav__link::after { transition: none; }
}