/* ============================================================
   德赢品牌站 · 共享样式表 /assets/site.css
   奶油纸底 + 青绿主色 + 暖橙行动色的复古出版体系，
   表面覆盖硬边框、硬阴影的现代粗野主义细节。
   ============================================================ */

/* ---------- 1. 变量 ---------- */
:root {
  --cream: #F6F1E4;
  --panel: #FFFCF3;
  --green: #0F7A68;
  --green-dark: #0A5648;
  --orange: #E85D22;
  --ink: #12263A;
  --mint: #D7EBE3;
  --taupe: #6E6558;
  --yellow: #F2C14E;
  --cream-soft: rgba(246, 241, 228, 0.72);
  --cream-faint: rgba(246, 241, 228, 0.28);
  --rule-soft: rgba(10, 86, 72, 0.18);

  --font-sans: "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono: ui-monospace, "SFMono-Regular", "JetBrains Mono", Menlo, Consolas, "Courier New", monospace;

  --wrap: 1180px;
  --shadow: 6px 6px 0 var(--green-dark);
  --shadow-sm: 4px 4px 0 var(--green-dark);
  --line: 3px solid var(--green-dark);
  --nav-break: 900px;
}

/* ---------- 2. 重置 ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
}

body {
  margin: 0;
  background: var(--cream);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  font-weight: 400;
}

img { max-width: 100%; display: block; }
h1, h2, h3, h4 { margin: 0; font-weight: 900; line-height: 1.25; letter-spacing: -0.01em; }
p { margin: 0 0 1em; }
ul, ol { margin: 0; padding: 0; list-style: none; }
figure { margin: 0; }
button { font: inherit; color: inherit; }

a {
  color: var(--green);
  text-decoration: none;
  transition: color 0.12s ease;
}
a:hover { color: var(--orange); }

:focus-visible {
  outline: 3px solid var(--orange);
  outline-offset: 3px;
}

/* ---------- 3. 容器 ---------- */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding-left: clamp(16px, 4vw, 40px);
  padding-right: clamp(16px, 4vw, 40px);
}

/* ---------- 4. 跳转链 ---------- */
.skip-link {
  position: absolute;
  left: 12px;
  top: -120px;
  z-index: 120;
  background: var(--orange);
  color: #fff;
  font-weight: 700;
  font-size: 14px;
  padding: 10px 20px;
  border: 3px solid var(--ink);
  transition: top 0.15s ease;
}
.skip-link:focus { top: 12px; color: #fff; }

/* ---------- 5. 页头 ---------- */
.site-header { position: relative; }

.header-rail { background: var(--ink); color: var(--cream); }

.rail-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  min-height: 38px;
  padding-top: 6px;
  padding-bottom: 6px;
  font-size: 12.5px;
  letter-spacing: 0.03em;
}

.rail-brand {
  margin: 0;
  font-size: 14px;
  font-weight: 900;
  letter-spacing: 0.04em;
  color: var(--panel);
}
.rail-brand a {
  color: var(--panel);
  border-bottom: 2px solid var(--yellow);
  padding-bottom: 1px;
}
.rail-brand a:hover { color: var(--yellow); }

.rail-region { margin: 0; color: var(--mint); }
.rail-key {
  font-family: var(--font-mono);
  color: var(--yellow);
  margin-right: 8px;
  letter-spacing: 0.08em;
}

.rail-status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  font-family: var(--font-mono);
  color: var(--cream);
}

.pulse-dot {
  width: 8px;
  height: 8px;
  flex: 0 0 auto;
  background: var(--orange);
  animation: dotPulse 1.4s ease-out 1 both;
}

@keyframes dotPulse {
  0%   { transform: scale(1); opacity: 1; }
  50%  { transform: scale(1.7); opacity: 0.55; }
  100% { transform: scale(1); opacity: 1; }
}

.header-main {
  position: relative;
  background: var(--panel);
  border-bottom: var(--line);
}

.main-inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding-top: 12px;
  padding-bottom: 12px;
}

.site-nav { flex: 1 1 auto; min-width: 0; }

.nav-list {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 4px;
}

.nav-item { display: block; }

.nav-link {
  display: block;
  padding: 10px 18px;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--ink);
  border: 2px solid transparent;
  border-bottom: 3px solid transparent;
  transition: color 0.12s ease, background-color 0.12s ease, border-color 0.12s ease;
}
.nav-link:hover {
  color: var(--green);
  background: var(--mint);
  border-bottom-color: var(--green);
}
.nav-link[aria-current="page"] {
  color: var(--panel);
  background: var(--green);
  border-bottom-color: var(--orange);
}
.nav-link[aria-current="page"]:hover {
  color: var(--panel);
  background: var(--green-dark);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  background: var(--panel);
  border: var(--line);
  box-shadow: var(--shadow-sm);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  cursor: pointer;
  transition: background-color 0.12s ease, box-shadow 0.12s ease, transform 0.12s ease;
}
.nav-toggle:hover { background: var(--mint); }
.nav-toggle:active { box-shadow: 0 0 0 var(--green-dark); transform: translate(4px, 4px); }

.nav-toggle-icon {
  position: relative;
  display: block;
  width: 18px;
  height: 2px;
  background: var(--ink);
}
.nav-toggle-icon::before,
.nav-toggle-icon::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background: var(--ink);
}
.nav-toggle-icon::before { top: -6px; }
.nav-toggle-icon::after { top: 6px; }

.nav-toggle-text { display: block; }

.header-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  z-index: 100;
  pointer-events: none;
  background: transparent;
}
.header-progress > span {
  display: block;
  width: 0;
  height: 100%;
  background: var(--orange);
  transition: width 0.1s linear;
}

/* ---------- 6. 页脚 ---------- */
.site-footer {
  margin-top: clamp(48px, 7vw, 96px);
  background: var(--ink);
  color: var(--cream);
  border-top: 3px solid var(--green);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.6fr;
  gap: clamp(22px, 3vw, 44px);
  padding-top: clamp(40px, 5vw, 64px);
  padding-bottom: clamp(32px, 4vw, 52px);
}

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

.footer-logo {
  margin: 0 0 10px;
  font-size: 22px;
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--panel);
}

.footer-tagline {
  margin: 0;
  max-width: 26em;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mint);
}

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

.footer-heading {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--yellow);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-link {
  width: fit-content;
  font-size: 15px;
  color: var(--cream);
  border-bottom: 2px solid transparent;
  transition: color 0.12s ease, border-color 0.12s ease;
}
.footer-link:hover {
  color: var(--orange);
  border-bottom-color: var(--orange);
}

.footer-line {
  margin: 0;
  font-size: 14px;
  line-height: 1.65;
  color: var(--mint);
}
.footer-line .mono { font-family: var(--font-mono); letter-spacing: 0.02em; }

.footer-note {
  margin: 14px 0 0;
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--cream-soft);
}

.footer-base { border-top: 2px solid rgba(232, 93, 34, 0.7); }

.footer-base-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-top: 16px;
  padding-bottom: 16px;
}

.footer-copy {
  margin: 0;
  font-size: 13px;
  color: var(--cream-soft);
}

.footer-update {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.05em;
  color: var(--orange);
}

/* ---------- 7. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 26px;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--ink);
  background: var(--panel);
  border: 3px solid var(--green-dark);
  box-shadow: 5px 5px 0 var(--green-dark);
  cursor: pointer;
  transition: background-color 0.12s ease, color 0.12s ease, box-shadow 0.12s ease, transform 0.12s ease;
}
.btn:hover { background: var(--mint); color: var(--ink); }
.btn:active { box-shadow: 0 0 0 var(--green-dark); transform: translate(5px, 5px); }

.btn-accent {
  color: #fff;
  background: var(--orange);
  border-color: var(--ink);
  box-shadow: 5px 5px 0 var(--ink);
}
.btn-accent:hover { color: #fff; background: #C94A16; }
.btn-accent:active { box-shadow: 0 0 0 var(--ink); transform: translate(5px, 5px); }

.btn-ghost {
  color: var(--green-dark);
  background: transparent;
  box-shadow: none;
}
.btn-ghost:hover { color: var(--panel); background: var(--green-dark); }
.btn-ghost:active { box-shadow: none; transform: none; }

/* ---------- 8. 面包屑 ---------- */
.breadcrumb { margin: 0 0 18px; }

.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.03em;
  color: var(--taupe);
}

.breadcrumb-item { display: flex; align-items: center; }
.breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  margin: 0 8px;
  color: var(--green);
}
.breadcrumb-item[aria-current="page"] { color: var(--ink); font-weight: 700; }

.breadcrumb-link {
  color: var(--green);
  border-bottom: 1px solid transparent;
}
.breadcrumb-link:hover {
  color: var(--orange);
  border-bottom-color: var(--orange);
}

/* ---------- 9. 页面头部 ---------- */
.page-head {
  padding: clamp(30px, 5vw, 56px) 0 clamp(22px, 3vw, 34px);
  border-bottom: 3px solid var(--green-dark);
}

.page-kicker {
  display: inline-block;
  margin: 0 0 16px;
  padding: 5px 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--panel);
  background: var(--green);
}

.page-title {
  margin: 0 0 14px;
  font-size: clamp(30px, 5vw, 52px);
  letter-spacing: -0.02em;
}

.page-lede {
  margin: 0;
  max-width: 54em;
  font-size: clamp(15px, 1.6vw, 17px);
  color: var(--taupe);
}

/* ---------- 10. 章节 ---------- */
.section {
  padding: clamp(34px, 5vw, 68px) 0;
  border-bottom: 2px solid var(--rule-soft);
}
.section:last-child { border-bottom: 0; }

.section-head {
  display: flex;
  align-items: flex-start;
  gap: clamp(14px, 2vw, 24px);
  margin: 0 0 clamp(20px, 3vw, 32px);
}

.section-number {
  flex: 0 0 auto;
  padding: 10px 14px 10px 12px;
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.4vw, 40px);
  font-weight: 700;
  line-height: 1;
  color: var(--panel);
  background: var(--green);
  border: 3px solid var(--green-dark);
  border-left: 6px solid var(--orange);
  box-shadow: var(--shadow-sm);
}

.section-heading { min-width: 0; }

.section-title {
  margin: 0 0 6px;
  font-size: clamp(21px, 2.6vw, 30px);
}

.section-sub {
  margin: 0;
  max-width: 50em;
  font-size: 14.5px;
  color: var(--taupe);
}

/* ---------- 11. 网格 ---------- */
.grid { display: grid; gap: clamp(16px, 2.4vw, 28px); }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-split { grid-template-columns: repeat(12, minmax(0, 1fr)); }

.col-5 { grid-column: span 5; }
.col-6 { grid-column: span 6; }
.col-7 { grid-column: span 7; }

/* ---------- 12. 面板 ---------- */
.panel {
  padding: clamp(18px, 2.4vw, 28px);
  background: var(--panel);
  border: var(--line);
  box-shadow: var(--shadow);
}

.panel-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0 0 14px;
  font-size: 18px;
  font-weight: 900;
}

.panel-body { color: var(--ink); }
.panel-body > :last-child { margin-bottom: 0; }

.panel-foot {
  margin-top: 18px;
  padding-top: 14px;
  font-size: 13px;
  color: var(--taupe);
  border-top: 2px dashed rgba(10, 86, 72, 0.35);
}

.panel-accent {
  border-color: var(--ink);
  box-shadow: 6px 6px 0 var(--orange);
}

.panel-ink {
  color: var(--cream);
  background: var(--ink);
  border-color: var(--ink);
  box-shadow: 6px 6px 0 var(--green);
}
.panel-ink .panel-head { color: var(--panel); }
.panel-ink .panel-body { color: var(--cream); }
.panel-ink .panel-foot {
  color: var(--cream-soft);
  border-top-color: var(--cream-faint);
}
.panel-ink a { color: var(--yellow); }
.panel-ink a:hover { color: var(--orange); }

/* ---------- 13. 标签 ---------- */
.tag {
  display: inline-block;
  padding: 3px 9px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.5;
  letter-spacing: 0.04em;
  border: 2px solid currentColor;
}
.tag-green { color: var(--green-dark); background: var(--mint); border-color: var(--green-dark); }
.tag-accent { color: #fff; background: var(--orange); border-color: var(--orange); }
.tag-yellow { color: var(--ink); background: var(--yellow); border-color: var(--yellow); }

/* ---------- 14. 文本工具 ---------- */
.mono { font-family: var(--font-mono); letter-spacing: 0.02em; }

.price {
  font-family: var(--font-mono);
  font-size: 1.15em;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--orange);
}

.hint {
  font-size: 13px;
  line-height: 1.7;
  color: var(--taupe);
}

.prose {
  max-width: 62ch;
  font-size: 16.5px;
}
.prose h3 { margin: 1.6em 0 0.5em; font-size: 19px; }
.prose p { margin: 0 0 1.1em; }
.prose ul { margin: 0 0 1.1em; padding-left: 1.3em; list-style: square; }
.prose li { margin-bottom: 0.35em; }

/* ---------- 15. 图片容器 ---------- */
.media-frame {
  position: relative;
  display: block;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  background: var(--mint);
  border: var(--line);
  box-shadow: var(--shadow);
}
.media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}
.media-frame > figcaption {
  position: absolute;
  left: 0;
  bottom: 0;
  margin: 0;
  padding: 6px 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.03em;
  color: var(--cream);
  background: var(--ink);
}

.media-frame--tall { aspect-ratio: 4 / 5; }
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--square { aspect-ratio: 1 / 1; }

/* ---------- 16. 响应式 ---------- */
@media (max-width: 960px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .col-5,
  .col-6,
  .col-7 { grid-column: span 12; }
}

@media (max-width: 900px) {
  .nav-toggle { display: inline-flex; }

  .site-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    z-index: 60;
    display: none;
    padding: 10px 12px;
    background: var(--panel);
    border-top: var(--line);
    border-bottom: var(--line);
    box-shadow: 0 6px 0 var(--green-dark);
  }
  .site-nav[data-open] { display: block; }

  .nav-list { flex-direction: column; gap: 0; }
  .nav-item { width: 100%; }
  .nav-link {
    padding: 14px 12px;
    border-bottom-width: 2px;
  }
}

@media (max-width: 640px) {
  html { scroll-padding-top: 72px; }

  .rail-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 2px;
    padding-top: 9px;
    padding-bottom: 9px;
  }
  .rail-region,
  .rail-status { font-size: 12px; }

  .footer-grid { grid-template-columns: 1fr; }
  .grid-2,
  .grid-3,
  .grid-split { grid-template-columns: minmax(0, 1fr); }
  .col-5,
  .col-6,
  .col-7 { grid-column: auto; }

  .section-head { flex-direction: column; gap: 12px; }
  .breadcrumb-list { font-size: 12px; }
}

/* ---------- 17. 减少动效 ---------- */
@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;
  }
  .btn:active,
  .btn-accent:active,
  .nav-toggle:active { transform: none; }
}