/* =========================================================
   God-Bo 大博 · AI+易学  —  国风宣传站样式
   配色与排版统一管理于 :root 变量
   ========================================================= */

:root {
  /* —— 主色板 —— */
  --ink: #14110f;          /* 墨黑 */
  --paper: #f5f0e6;        /* 宣纸米白 */
  --paper-2: #efe7d6;      /* 宣纸略深（卡片/分区） */
  --cinnabar: #b0392e;     /* 朱砂红 */
  --teal: #1f4e5f;         /* 黛青 */
  --gold: #c9a86a;         /* 描金 */

  --ink-rgb: 20, 17, 15;
  --paper-rgb: 245, 240, 230;
  --cinnabar-rgb: 176, 57, 46;
  --teal-rgb: 31, 78, 95;
  --gold-rgb: 201, 168, 106;

  /* —— 字体 —— */
  --font-serif: "Noto Serif SC", "Songti SC", "STSong", "SimSun", Georgia, serif;
  --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", system-ui, sans-serif;
  --font-cal: "Ma Shan Zheng", "Noto Serif SC", "STKaiti", "KaiTi", serif;

  /* —— 尺寸 —— */
  --maxw: 1120px;
  --nav-h: 64px;
  --radius: 6px;
  --shadow-sm: 0 2px 10px rgba(var(--ink-rgb), 0.08);
  --shadow-md: 0 12px 36px rgba(var(--ink-rgb), 0.14);
}

/* ---------- 基础重置 ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 12px);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.75;
  font-size: 16px;
  letter-spacing: 0.01em;
  overflow-x: hidden;
}

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

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

h1, h2, h3 {
  font-family: var(--font-serif);
  font-weight: 600;
  line-height: 1.3;
  margin: 0;
}

.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: 24px;
}

/* =========================================================
   导航
   ========================================================= */
.nav {
  position: fixed;
  inset: 0 0 auto 0;
  height: var(--nav-h);
  z-index: 100;
  background: rgba(var(--paper-rgb), 0.86);
  backdrop-filter: saturate(140%) blur(10px);
  -webkit-backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid rgba(var(--ink-rgb), 0.08);
  transition: background 0.3s ease, box-shadow 0.3s ease;
}
.nav--scrolled {
  box-shadow: var(--shadow-sm);
  background: rgba(var(--paper-rgb), 0.94);
}

.nav__inner {
  height: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.nav__brand {
  font-family: var(--font-cal);
  font-size: 1.7rem;
  color: var(--cinnabar);
  letter-spacing: 0.08em;
  line-height: 1;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav__link {
  position: relative;
  font-size: 0.98rem;
  color: var(--ink);
  padding: 6px 2px;
  transition: color 0.2s ease;
}
.nav__link::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -2px;
  height: 2px;
  background: var(--cinnabar);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s ease;
}
.nav__link:hover,
.nav__link.is-active { color: var(--cinnabar); }
.nav__link:hover::after,
.nav__link.is-active::after { transform: scaleX(1); }

/* 汉堡按钮 */
.nav__toggle {
  display: none;
  width: 42px; height: 42px;
  border: none;
  background: transparent;
  cursor: pointer;
  padding: 0;
  position: relative;
}
.nav__toggle span {
  position: absolute;
  left: 9px; right: 9px;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.2s ease, top 0.3s ease;
}
.nav__toggle span:nth-child(1) { top: 13px; }
.nav__toggle span:nth-child(2) { top: 20px; }
.nav__toggle span:nth-child(3) { top: 27px; }
.nav__toggle[aria-expanded="true"] span:nth-child(1) { top: 20px; transform: rotate(45deg); }
.nav__toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav__toggle[aria-expanded="true"] span:nth-child(3) { top: 20px; transform: rotate(-45deg); }

/* =========================================================
   按钮
   ========================================================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 13px 28px;
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 500;
  border-radius: var(--radius);
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.25s ease, background 0.25s ease, color 0.25s ease;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); }

.btn--primary {
  background: var(--cinnabar);
  color: var(--paper);
  box-shadow: 0 6px 18px rgba(var(--cinnabar-rgb), 0.32);
}
.btn--primary:hover { background: #9c3027; box-shadow: 0 10px 24px rgba(var(--cinnabar-rgb), 0.4); }

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

/* 深色区里的幽灵按钮 */
.section--dark .btn--ghost {
  color: var(--paper);
  border-color: rgba(var(--paper-rgb), 0.6);
}
.section--dark .btn--ghost:hover { background: var(--paper); color: var(--ink); }

/* =========================================================
   印章样式的章节标记
   ========================================================= */
.seal {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 52px;
  height: 52px;
  padding: 0 10px;
  background: var(--cinnabar);
  color: var(--paper);
  font-family: var(--font-cal);
  font-size: 1.4rem;
  letter-spacing: 0.1em;
  border-radius: 4px;
  box-shadow: 0 4px 12px rgba(var(--cinnabar-rgb), 0.3);
  transform: rotate(-3deg);
  /* 仿印章的轻微做旧边框 */
  border: 2px solid rgba(var(--paper-rgb), 0.35);
}
.seal--light {
  background: var(--cinnabar);
  color: var(--paper);
  box-shadow: 0 4px 12px rgba(var(--cinnabar-rgb), 0.45);
}

/* =========================================================
   通用区块
   ========================================================= */
.section {
  padding-block: clamp(64px, 10vw, 120px);
  position: relative;
}
.section--paper { background: var(--paper); color: var(--ink); }
.section--dark { background: var(--ink); color: var(--paper); }

.section__head {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-bottom: 36px;
}
.section__title {
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  color: var(--ink);
}
.section__title--light { color: var(--paper); }

/* 章节之间的毛笔横线分隔（首屏之后的每个板块顶部） */
.section + .section::before,
.hero + .section::before {
  content: "";
  display: block;
  height: 2px;
  width: min(220px, 60%);
  margin: 0 auto;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
  opacity: 0.5;
}

/* =========================================================
   Hero
   ========================================================= */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background:
    radial-gradient(120% 90% at 50% 0%, rgba(var(--teal-rgb), 0.14), transparent 60%),
    radial-gradient(120% 90% at 50% 100%, rgba(var(--cinnabar-rgb), 0.12), transparent 60%),
    var(--paper);
  overflow: hidden;
}

/* 水墨八卦背景（JS 注入 SVG） */
.hero__bagua {
  position: absolute;
  inset: -10% -10% -10% -10%;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 0;
  opacity: 0.07;
  pointer-events: none;
  will-change: transform;
}
.hero__bagua svg { width: min(150vh, 1100px); height: auto; }

/* 电路板纹理（纯 CSS 网格 + 节点） */
.hero__circuit {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.5;
  background-image:
    linear-gradient(rgba(var(--teal-rgb), 0.10) 1px, transparent 1px),
    linear-gradient(90deg, rgba(var(--teal-rgb), 0.10) 1px, transparent 1px),
    radial-gradient(rgba(var(--gold-rgb), 0.18) 1.4px, transparent 1.6px);
  background-size: 46px 46px, 46px 46px, 46px 46px;
  background-position: -1px -1px, -1px -1px, 0 0;
  -webkit-mask-image: radial-gradient(120% 90% at 50% 40%, #000 35%, transparent 80%);
          mask-image: radial-gradient(120% 90% at 50% 40%, #000 35%, transparent 80%);
}

/* 顶部到底部的柔和遮罩，保证文字清晰 */
.hero__veil {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background: radial-gradient(70% 60% at 50% 50%, rgba(var(--paper-rgb), 0.55), transparent 75%);
}

.hero__inner {
  position: relative;
  z-index: 2;
  padding-block: 96px;
}

.hero__eyebrow {
  font-family: var(--font-sans);
  letter-spacing: 0.4em;
  font-size: 0.85rem;
  color: var(--teal);
  margin: 0 0 18px;
  text-indent: 0.4em;
}

.hero__title {
  font-family: var(--font-cal);
  font-weight: 400;
  font-size: clamp(2.6rem, 8vw, 5rem);
  line-height: 1.18;
  color: var(--ink);
  margin: 0;
  text-shadow: 0 2px 18px rgba(var(--paper-rgb), 0.6);
}

.hero__subtitle {
  font-family: var(--font-serif);
  font-size: clamp(1.1rem, 3vw, 1.6rem);
  color: var(--cinnabar);
  margin: 22px 0 0;
  letter-spacing: 0.08em;
}

.hero__tagline {
  font-size: clamp(0.95rem, 2.4vw, 1.1rem);
  color: var(--teal);
  margin: 16px 0 0;
  letter-spacing: 0.04em;
}

.hero__author {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  color: var(--ink);
  margin: 14px 0 0;
  opacity: 0.8;
}

.hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
  margin-top: 38px;
}

/* 向下滚动提示 */
.hero__scroll {
  position: absolute;
  left: 50%;
  bottom: 26px;
  transform: translateX(-50%);
  z-index: 2;
  width: 26px; height: 44px;
  display: flex;
  justify-content: center;
}
.hero__scroll-line {
  width: 2px; height: 100%;
  background: linear-gradient(var(--cinnabar), transparent);
  position: relative;
  overflow: hidden;
}
.hero__scroll-line::after {
  content: "";
  position: absolute;
  top: -50%; left: 0;
  width: 100%; height: 50%;
  background: var(--cinnabar);
  animation: scrollDot 1.8s ease-in-out infinite;
}
@keyframes scrollDot {
  0% { top: -50%; } 60%,100% { top: 100%; }
}

/* =========================================================
   关于我
   ========================================================= */
.lede {
  font-family: var(--font-serif);
  font-size: clamp(1.1rem, 2.6vw, 1.45rem);
  line-height: 1.9;
  max-width: 820px;
  color: var(--ink);
  margin: 0 0 48px;
}
.hl { color: var(--cinnabar); font-weight: 600; }

.about__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 20px;
}
.about__card {
  background: var(--paper-2);
  border: 1px solid rgba(var(--ink-rgb), 0.08);
  border-top: 3px solid var(--gold);
  border-radius: var(--radius);
  padding: 26px 24px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.about__card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.about__card-title {
  font-family: var(--font-cal);
  font-size: 1.5rem;
  color: var(--teal);
  margin: 0 0 12px;
}
.about__card p { margin: 0; font-size: 0.98rem; color: rgba(var(--ink-rgb), 0.86); }

/* =========================================================
   核心资产 表格
   ========================================================= */
.table-wrap {
  overflow-x: auto;
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
}
.assets-table {
  width: 100%;
  border-collapse: collapse;
  background: rgba(var(--paper-rgb), 0.04);
  min-width: 560px;
}
.assets-table th,
.assets-table td {
  padding: 18px 20px;
  text-align: left;
  border-bottom: 1px solid rgba(var(--paper-rgb), 0.12);
  vertical-align: top;
}
.assets-table thead th {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  color: var(--gold);
  background: rgba(var(--gold-rgb), 0.10);
  letter-spacing: 0.06em;
}
.assets-table tbody tr:last-child td { border-bottom: none; }
.assets-table tbody tr { transition: background 0.2s ease; }
.assets-table tbody tr:hover { background: rgba(var(--paper-rgb), 0.05); }
.td-dim {
  font-family: var(--font-serif);
  color: var(--paper);
  font-weight: 600;
  white-space: nowrap;
  width: 96px;
}
.assets-table td:nth-child(2) { color: rgba(var(--paper-rgb), 0.9); }
.td-stars {
  color: var(--gold);
  letter-spacing: 2px;
  font-size: 1.05rem;
  white-space: nowrap;
  width: 130px;
}

.insight {
  position: relative;
  margin: 44px 0 0;
  padding: 30px 32px 30px 34px;
  background: linear-gradient(180deg, rgba(var(--cinnabar-rgb), 0.12), rgba(var(--cinnabar-rgb), 0.05));
  border-left: 4px solid var(--cinnabar);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-family: var(--font-serif);
  font-size: clamp(1.02rem, 2.4vw, 1.25rem);
  line-height: 1.95;
  color: var(--paper);
}
.insight-em { color: var(--gold); font-weight: 600; }
.insight-strong { color: var(--cinnabar); font-weight: 700; }

/* =========================================================
   AI + 易学系统
   ========================================================= */
.manifesto {
  font-family: var(--font-cal);
  font-size: clamp(1.6rem, 5vw, 2.8rem);
  text-align: center;
  color: var(--ink);
  margin: 0 0 52px;
  line-height: 1.4;
}
.manifesto-em { color: var(--cinnabar); }

.cards {
  display: grid;
  gap: 22px;
}
.cards--4 { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.cards--3 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }

.card {
  background: var(--paper-2);
  border: 1px solid rgba(var(--ink-rgb), 0.08);
  border-radius: var(--radius);
  padding: 30px 26px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}
.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: var(--gold);
}
.card__icon {
  width: 64px; height: 64px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 50%;
  background: rgba(var(--teal-rgb), 0.10);
  color: var(--teal);
  margin-bottom: 18px;
}
.card__title {
  font-size: 1.25rem;
  color: var(--ink);
  margin: 0 0 10px;
}
.card__text { margin: 0; font-size: 0.98rem; color: rgba(var(--ink-rgb), 0.84); }

.system__note {
  margin: 48px auto 0;
  max-width: 880px;
  text-align: center;
  font-family: var(--font-serif);
  font-size: clamp(1rem, 2.4vw, 1.18rem);
  line-height: 1.95;
  color: var(--teal);
}
.system__note b { color: var(--cinnabar); font-weight: 600; }

/* =========================================================
   内容矩阵 系列卡片
   ========================================================= */
.series {
  position: relative;
  background: rgba(var(--paper-rgb), 0.04);
  border: 1px solid rgba(var(--paper-rgb), 0.12);
  border-radius: var(--radius);
  padding: 30px 26px 28px;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}
.series:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: var(--gold);
}
.series__tag {
  display: inline-block;
  font-size: 0.78rem;
  letter-spacing: 0.15em;
  color: var(--paper);
  background: var(--teal);
  padding: 3px 12px;
  border-radius: 999px;
  margin-bottom: 14px;
}
.series__title {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  color: var(--gold);
  margin: 0 0 18px;
  letter-spacing: 0.04em;
}
.series__list {
  margin: 0;
  padding: 0;
  list-style: none;
}
.series__list li {
  position: relative;
  padding: 10px 0 10px 22px;
  border-top: 1px dashed rgba(var(--paper-rgb), 0.16);
  color: rgba(var(--paper-rgb), 0.9);
  font-size: 0.98rem;
}
.series__list li:first-child { border-top: none; }
.series__list li::before {
  content: "◈";
  position: absolute;
  left: 0; top: 10px;
  color: var(--cinnabar);
  font-size: 0.8rem;
}

/* =========================================================
   合规优势
   ========================================================= */
.checks {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 22px;
}
.checks__item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  background: var(--paper-2);
  border: 1px solid rgba(var(--ink-rgb), 0.08);
  border-radius: var(--radius);
  padding: 24px 22px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.checks__item:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.checks__mark {
  flex: none;
  width: 34px; height: 34px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 50%;
  background: var(--cinnabar);
  color: var(--paper);
  font-size: 1.1rem;
  font-weight: 700;
}
.checks__title { font-size: 1.15rem; margin: 0 0 6px; color: var(--ink); }
.checks__text { margin: 0; font-size: 0.96rem; color: rgba(var(--ink-rgb), 0.82); }

.value {
  margin: 44px 0 0;
  text-align: center;
  font-family: var(--font-serif);
  font-size: clamp(1.05rem, 2.6vw, 1.35rem);
  line-height: 1.95;
  color: var(--teal);
}
.value-em { color: var(--cinnabar); font-weight: 700; }

/* =========================================================
   联系 / CTA
   ========================================================= */
.contact__lede {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 44px;
  font-size: clamp(1rem, 2.4vw, 1.2rem);
  color: rgba(var(--paper-rgb), 0.9);
}

.brandkit {
  background: rgba(var(--paper-rgb), 0.04);
  border: 1px solid rgba(var(--paper-rgb), 0.12);
  border-radius: var(--radius);
  padding: 30px 28px;
}
.brandkit__title {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  color: var(--gold);
  margin: 0 0 18px;
  letter-spacing: 0.04em;
}
.brandkit__list { margin: 0; }
.brandkit__row {
  display: grid;
  grid-template-columns: 84px 1fr;
  gap: 16px;
  padding: 14px 0;
  border-top: 1px dashed rgba(var(--paper-rgb), 0.16);
}
.brandkit__row:first-child { border-top: none; }
.brandkit__row dt {
  font-family: var(--font-serif);
  color: var(--cinnabar);
  font-weight: 600;
  margin: 0;
}
.brandkit__row dd { margin: 0; color: rgba(var(--paper-rgb), 0.9); font-size: 0.98rem; }

.cta-box {
  margin-top: 40px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 22px;
}
.cta-box__text {
  font-family: var(--font-serif);
  font-size: clamp(1.1rem, 3vw, 1.5rem);
  color: var(--paper);
  margin: 0;
  max-width: 720px;
  line-height: 1.7;
}

/* =========================================================
   Footer
   ========================================================= */
.footer {
  background: #0e0c0a;
  color: rgba(var(--paper-rgb), 0.66);
  padding-block: 48px;
  border-top: 3px solid var(--cinnabar);
}
.footer__inner { text-align: center; }
.footer__brand {
  font-family: var(--font-cal);
  font-size: 1.5rem;
  color: var(--gold);
  margin: 0 0 16px;
  letter-spacing: 0.08em;
}
.footer__disclaimer {
  max-width: 760px;
  margin: 0 auto 18px;
  font-size: 0.86rem;
  line-height: 1.85;
}
.footer__copy { margin: 0; font-size: 0.82rem; color: rgba(var(--paper-rgb), 0.45); }
.footer__icp { margin: 14px 0 0; font-size: 0.82rem; color: rgba(var(--paper-rgb), 0.45); }
.footer__icp a {
  color: rgba(var(--paper-rgb), 0.62);
  text-decoration: none;
  border-bottom: 1px dotted rgba(var(--paper-rgb), 0.28);
  transition: color 0.2s ease, border-color 0.2s ease;
}
.footer__icp a:hover { color: var(--gold); border-bottom-color: var(--gold); }

/* =========================================================
   滚动揭示动画
   ========================================================= */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s ease;
  transition-delay: calc(var(--d, 0) * 0.1s);
}
.reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* 尊重用户的减少动效偏好 */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .hero__scroll-line::after { animation: none; }
}

/* =========================================================
   响应式
   ========================================================= */
@media (max-width: 860px) {
  .nav__toggle { display: block; }

  .nav__links {
    position: fixed;
    inset: var(--nav-h) 0 auto 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: rgba(var(--paper-rgb), 0.98);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(var(--ink-rgb), 0.1);
    padding: 8px 0 16px;
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.3s ease, opacity 0.3s ease;
    box-shadow: var(--shadow-md);
  }
  .nav__links.is-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .nav__link {
    padding: 14px 24px;
    border-bottom: 1px solid rgba(var(--ink-rgb), 0.06);
    font-size: 1.05rem;
  }
  .nav__link::after { display: none; }
  .nav__link:hover,
  .nav__link.is-active { background: rgba(var(--cinnabar-rgb), 0.08); }
}

@media (max-width: 560px) {
  .container { padding-inline: 18px; }
  .section { padding-block: 56px; }
  .hero__cta { flex-direction: column; width: 100%; max-width: 320px; margin-inline: auto; }
  .hero__cta .btn { width: 100%; }
  .brandkit__row { grid-template-columns: 1fr; gap: 4px; }
  .brandkit__row dt { font-size: 0.9rem; }
  .insight { padding: 24px 20px; }
}