/* ============================================================
   site.css — 全站共享：设计令牌 / 基础样式 / 顶栏 / 页脚 / 门户首页
   「模板」文件 — 更新数据时请勿修改
   ============================================================ */

:root {
  --paper:        #F4F1E8;   /* 主背景 — 和纸 */
  --paper-light:  #FAF7EF;   /* 卡片背景 */
  --paper-shade:  #EAE5D6;   /* 阴影/分隔 */
  --ink:          #1F1B17;   /* 主文字 — 墨 */
  --ink-soft:     #5A5249;   /* 次文字 */
  --ink-fade:     #A39A8E;   /* 弱化 */
  --line:         #D8D2C5;   /* 极细线 */
  --line-strong:  #B5AC9B;   /* 强线 */
  --vermilion:    #A8322D;   /* 朱色 */
  --vermilion-bg: #F4E6E4;   /* 朱色淡背景 */
  --moss:         #5B7A4E;   /* 苔色 — 上涨 */
  --moss-bg:      #ECF0E5;   /* 苔色淡背景 */
  --gold:         #9B7E3F;   /* 淡金 — 强调 */
  --gold-bg:      #F2EBD8;
  --radius:       2px;
  --pad:          24px;
  --font-zh:      "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
                  "Hiragino Kaku Gothic ProN", system-ui, -apple-system, sans-serif;
  --font-serif:   "Songti SC", "STSong", "Noto Serif CJK SC",
                  "Noto Serif JP", "Hiragino Mincho ProN", "Yu Mincho",
                  Georgia, serif;
  --font-mono:    ui-monospace, "SF Mono", "JetBrains Mono",
                  "Cascadia Code", "Source Code Pro", Menlo, monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-zh);
  font-size: 14px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

/* 和纸纹理 — 极轻噪点 */
body::before {
  content: "";
  position: fixed; inset: 0;
  pointer-events: none;
  z-index: 1;
  background-image:
    radial-gradient(circle at 1px 1px, rgba(31,27,23,0.018) 1px, transparent 0);
  background-size: 4px 4px;
}

a { color: inherit; text-decoration: none; }
img { display: block; }

/* ============ 顶栏 (grainbar) ============ */
.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(244,241,232,0.92);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--line);
}
.topbar-inner {
  max-width: 1320px;
  margin: 0 auto;
  padding: 12px var(--pad);
  display: flex;
  align-items: center;
  gap: 20px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 2px;
  color: var(--ink-soft);
  white-space: nowrap;
}
.brand .hanko-mini {
  width: 24px; height: 24px;
  background: var(--vermilion);
  color: var(--paper);
  font-family: var(--font-serif);
  font-size: 13px;
  display: flex;
  align-items: center;
  justify-content: center;
  transform: rotate(-3deg);
  position: relative;
  flex-shrink: 0;
}
.brand .hanko-mini::before {
  content: "";
  position: absolute; inset: 2px;
  border: 1px solid rgba(244,241,232,0.4);
}
.topnav {
  display: flex;
  gap: 4px;
  margin-left: 8px;
  min-width: 0;
}
.topnav a {
  font-family: var(--font-serif);
  font-size: 13px;
  letter-spacing: 3px;
  color: var(--ink-soft);
  padding: 6px 14px;
  border-bottom: 2px solid transparent;
  transition: color .2s, border-color .2s;
  white-space: nowrap; /* 中文字符禁止逐字换行堆叠 */
}
.topnav a:hover { color: var(--ink); }
.topnav a.active {
  color: var(--vermilion);
  border-bottom-color: var(--vermilion);
}
.topbar-meta {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 1px;
  color: var(--ink-fade);
  text-align: right;
  line-height: 1.7;
  white-space: nowrap;
}

/* ============ 页脚 ============ */
.footer {
  max-width: 1320px;
  margin: 0 auto;
  padding: 24px var(--pad) 40px;
  border-top: 1px solid var(--line);
  font-size: 11px;
  color: var(--ink-fade);
  letter-spacing: 0.8px;
  font-family: var(--font-mono);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  position: relative;
  z-index: 2;
}
.footer .sep { color: var(--line-strong); margin: 0 8px; }
.footer a:hover { color: var(--ink); }

/* ============ 门户首页 ============ */
.home-hero {
  max-width: 1320px;
  margin: 0 auto;
  padding: 72px var(--pad) 40px;
  position: relative;
  z-index: 2;
}
.home-hero-grid {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 36px;
  align-items: center;
}
.hanko {
  width: 72px; height: 72px;
  background: var(--vermilion);
  color: var(--paper);
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  flex-shrink: 0;
  transform: rotate(-3deg);
}
.hanko::before {
  content: "";
  position: absolute; inset: 4px;
  border: 1px solid rgba(244,241,232,0.4);
}
.hanko::after {
  content: "";
  position: absolute; inset: 0;
  background:
    radial-gradient(circle at 30% 20%, rgba(255,255,255,0.08), transparent 40%),
    radial-gradient(circle at 70% 80%, rgba(0,0,0,0.08), transparent 40%);
}
.hanko span { position: relative; z-index: 1; }

.hero-title-jp {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: 13px;
  color: var(--ink-soft);
  letter-spacing: 10px;
  margin-bottom: 14px;
}
.hero-title-main {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: 46px;
  letter-spacing: 10px;
  color: var(--ink);
  line-height: 1.15;
}
.hero-title-en {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-fade);
  letter-spacing: 4px;
  margin-top: 14px;
}
.hero-desc {
  max-width: 560px;
  margin-top: 22px;
  font-size: 13px;
  color: var(--ink-soft);
  line-height: 2;
  letter-spacing: 0.5px;
}

.home-modules {
  max-width: 1320px;
  margin: 0 auto;
  padding: 24px var(--pad) 80px;
  position: relative;
  z-index: 2;
}
.modules-label {
  font-family: var(--font-serif);
  font-size: 14px;
  letter-spacing: 6px;
  color: var(--ink);
  margin-bottom: 22px;
  display: flex;
  align-items: baseline;
  gap: 14px;
  font-weight: 500;
}
.modules-label .en {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 1.5px;
  color: var(--ink-fade);
  font-weight: 400;
}
.modules-label::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--line);
  margin-left: 12px;
  align-self: center;
}
.modules-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}
.module-card {
  background: var(--paper-light);
  border: 1px solid var(--line);
  border-top: 3px solid var(--vermilion);
  padding: 26px 24px 22px;
  display: block;
  transition: transform .25s, box-shadow .25s;
  position: relative;
}
.module-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 28px rgba(31,27,23,0.08);
}
.module-card .m-tag {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 2px;
  color: var(--vermilion);
  margin-bottom: 12px;
}
.module-card .m-title {
  font-family: var(--font-serif);
  font-size: 24px;
  letter-spacing: 4px;
  font-weight: 500;
  color: var(--ink);
}
.module-card .m-en {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 1.5px;
  color: var(--ink-fade);
  margin-top: 8px;
}
.module-card .m-desc {
  font-size: 12px;
  color: var(--ink-soft);
  line-height: 1.9;
  margin-top: 14px;
  letter-spacing: 0.3px;
}
.module-card .m-meta {
  margin-top: 18px;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 1px;
  color: var(--ink-fade);
  display: flex;
  justify-content: space-between;
}
.module-card .m-arrow {
  position: absolute;
  right: 20px; top: 24px;
  font-family: var(--font-mono);
  color: var(--ink-fade);
  font-size: 14px;
  transition: transform .25s, color .25s;
}
.module-card:hover .m-arrow { transform: translateX(4px); color: var(--vermilion); }

/* 筹备中的占位卡 */
.module-card.soon {
  border-top-color: var(--line-strong);
  background: transparent;
  cursor: default;
}
.module-card.soon:hover { transform: none; box-shadow: none; }
.module-card.soon .m-tag { color: var(--ink-fade); }
.module-card.soon .m-title { color: var(--ink-fade); }
.module-card.soon .m-badge {
  display: inline-block;
  font-family: var(--font-serif);
  font-size: 11px;
  letter-spacing: 3px;
  color: var(--gold);
  border: 1px solid var(--gold);
  padding: 3px 10px;
  margin-top: 16px;
}

@media (max-width: 900px) {
  .home-hero { padding-top: 44px; }
  .home-hero-grid { grid-template-columns: auto 1fr; gap: 20px; }
  .hanko { width: 56px; height: 56px; font-size: 26px; }
  .hero-title-main { font-size: 30px; letter-spacing: 6px; }
  .hero-title-jp { font-size: 12px; letter-spacing: 6px; }
  .topbar-meta { display: none; }
  /* 手机端顶栏: 品牌一行 + 导航一行（横向可滑动），不再挤压堆字 */
  .topbar-inner {
    flex-wrap: wrap;
    gap: 6px 14px;
    padding-top: 10px;
    padding-bottom: 10px;
  }
  .topnav {
    order: 3;
    width: 100%;
    margin-left: 0;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }
  .topnav::-webkit-scrollbar { display: none; }
  .topnav a {
    font-size: 12.5px;
    letter-spacing: 2px;
    padding: 6px 10px 8px;
  }
}

/* 五链接窄屏适配：缩字号与间距，保证一行放得下 */
@media (max-width: 560px) {
  .topnav {
    gap: 0;
    justify-content: space-between;
  }
  .topnav a {
    font-size: 11.5px;
    letter-spacing: 0.5px;
    padding: 6px 4px 8px;
  }
}

/* ============================================================
   窄屏加固（390px 级手机）：flex 换行 + 溢出兜底
   ============================================================ */
.masthead, .page-meta-row, .footer > div, .topbar-inner { flex-wrap: wrap; }
.page-meta-row { gap: 4px 14px; }
.page-meta-row span, .mh-right, .mh-brand { min-width: 0; overflow-wrap: anywhere; }
.topnav { flex-wrap: wrap; }
html, body { max-width: 100%; overflow-x: hidden; }
.tbl-wrap { max-width: 100%; }
.c-head, .wk-card-head, .df-head, .sp-head, .sec-head, .trust-thread h4 { flex-wrap: wrap; row-gap: 4px; }
.c-head .c-en, .page-blurb, .sec-foot, .df-note, .c-note { overflow-wrap: anywhere; }

@media (max-width: 430px) {
  .topnav { gap: 0; }
  .topnav a { font-size: 10.5px; letter-spacing: 0; padding: 5px 3px 7px; }
  .page-title { font-size: 20px; letter-spacing: 3px; }
  .page-blurb { font-size: 12px; line-height: 1.9; }
  .page-meta-row { font-size: 9.5px; }
  .masthead { font-size: 10px; }
  .tool-tabs .tt { font-size: 11px; padding: 6px 9px; letter-spacing: 0.5px; }
  .calc-card { padding: 16px 14px 13px; }
  .c-out .o-item .o-val { font-size: 15px; }
  .c-out .o-item .o-lbl { font-size: 10px; }
}

/* ============================================================
   表单控件主题化 —— 全站输入框/下拉/文本域贴合和纸底色
   （修复 iOS/微信/桌面浏览器对未显式着色控件的白色原生样式）
   ============================================================ */
input[type="text"], input[type="number"], input[type="search"], input[type="password"],
input[type="email"], input[type="tel"], input[type="date"], input:not([type]),
textarea, select {
  -webkit-appearance: none;
  appearance: none;
  background-color: var(--paper);
  color: var(--ink);
  border-radius: 0;
  font-family: var(--font-mono);
}
select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%238A8177' fill='none' stroke-width='1.5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  padding-right: 26px;
}
input[type="date"] { min-height: 1.6em; }
input[type="checkbox"], input[type="radio"] {
  -webkit-appearance: auto;
  appearance: auto;
  accent-color: #A8322D;
}
input::placeholder, textarea::placeholder { color: var(--ink-fade); }