/* ============================================================
   asdw3小站 / asdw3Web — 墨笺风格样式表
   主色调：暖墨黑底 + 纸白文字 + 朱砂红点缀
   字体：简体楷书（KaiTi），代码/哈希输出使用等宽字体
   ============================================================ */

:root {
  --ink:          #12100e;   /* 页面底色：暖墨黑 */
  --ink-2:        #171411;   /* 抬升面 */
  --panel:        #1c1814;   /* 卡片面板 */
  --panel-2:      #231e18;   /* 悬停面板 */
  --line:         #2b251d;   /* 描边 */
  --line-2:       #3a332a;   /* 描边加强 */
  --paper:        #e9e0cf;   /* 正文：暖纸白 */
  --paper-dim:    #a99d8a;   /* 次级文字 */
  --paper-faint:  #7c7160;   /* 弱化文字 */
  --cinnabar:     #c2472d;   /* 朱砂红（印章） */
  --cinnabar-soft:#d75f45;
  --cinnabar-ink: #7e2c1a;   /* 朱砂深色 */
  --gold:         #b59a63;   /* 淡金 */
  --ok:           #6f9a6a;   /* 成功绿（低饱和） */
  --err:          #b8564b;   /* 错误红 */
  --kai: "KaiTi", "楷体", "STKaiti", "Kaiti SC", "LXGW WenKai", "FangSong", "SimSun", serif;
  --mono: "Consolas", "Courier New", "SFMono-Regular", "Cascadia Mono", monospace;
  --radius: 8px;
  --shadow: 0 10px 30px rgba(0,0,0,.35);
  --container: 1060px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--kai);
  color: var(--paper);
  background:
    radial-gradient(1100px 560px at 50% -8%, rgba(194,71,45,.07), transparent 60%),
    radial-gradient(900px 520px at 50% 112%, rgba(181,154,99,.055), transparent 62%),
    var(--ink);
  background-attachment: fixed;
  font-size: 17px;
  line-height: 1.75;
  letter-spacing: .02em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* 极淡的纵向纸纤维纹理，避免纯黑死板 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image: repeating-linear-gradient(
    90deg,
    rgba(255,255,255,.012) 0 1px,
    transparent 1px 5px
  );
}

a { color: var(--paper); text-decoration: none; transition: color .2s ease; }
a:hover { color: var(--cinnabar-soft); }

::selection { background: rgba(194,71,45,.45); color: #fff; }

h1, h2, h3, h4 { margin: 0; font-weight: 500; line-height: 1.35; }
p { margin: 0; }

.container {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 22px;
}

/* ============================ 顶栏 ============================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(18,16,14,.82);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.seal {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 40px;
  padding: 0 15px;
  border-radius: 8px;
  background: var(--cinnabar);
  color: #f6eee2;
  font-family: var(--kai);
  font-size: 19px;
  font-weight: 700;
  letter-spacing: .02em;
  white-space: nowrap;
  box-shadow: inset 0 0 0 2px rgba(255,255,255,.18), 0 3px 10px rgba(194,71,45,.35);
  user-select: none;
  flex: none;
}

.brand-name {
  font-size: 21px;
  letter-spacing: .04em;
}
.brand-name b { color: var(--cinnabar-soft); font-weight: 500; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  display: inline-block;
  padding: 8px 16px;
  border-radius: 6px;
  font-size: 17px;
  letter-spacing: .06em;
  color: var(--paper-dim);
  position: relative;
}
.nav-links a:hover { color: var(--paper); background: var(--panel); }
.nav-links a.active {
  color: var(--paper);
  background: var(--panel);
}
.nav-links a.active::after {
  content: "";
  position: absolute;
  left: 16px; right: 16px; bottom: 3px;
  height: 2px;
  background: var(--cinnabar);
  border-radius: 1px;
}

/* ============================ 主体与区块 ============================ */
main { padding: 34px 0 70px; }

.section { margin: 0 0 56px; }

.section-head { margin-bottom: 24px; }

.section-title {
  font-size: 27px;
  letter-spacing: .08em;
  display: flex;
  align-items: center;
  gap: 14px;
}
.section-title .tick {
  width: 4px; height: 1.4em;
  background: var(--cinnabar);
  border-radius: 2px;
  flex: none;
}
.section-title .en {
  font-size: 13px;
  color: var(--paper-faint);
  letter-spacing: .18em;
  text-transform: uppercase;
  margin-left: auto;
  font-family: var(--mono);
}

.section-desc { margin-top: 10px; color: var(--paper-dim); font-size: 16px; }

/* 墨线分隔（落款式横线 + 中央菱形） */
.ink-rule {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 8px 0 26px;
  color: var(--paper-faint);
}
.ink-rule::before,
.ink-rule::after {
  content: "";
  height: 1px;
  flex: 1;
  background: linear-gradient(90deg, transparent, var(--line-2));
}
.ink-rule::after {
  background: linear-gradient(90deg, var(--line-2), transparent);
}
.ink-rule .dot {
  width: 7px; height: 7px;
  background: var(--cinnabar);
  transform: rotate(45deg);
  flex: none;
  opacity: .8;
}

/* ============================ 首页 hero ============================ */
.hero {
  padding: 40px 0 30px;
  text-align: center;
}
.hero .seal {
  height: 74px;
  padding: 0 26px;
  border-radius: 15px;
  font-size: 34px;
  margin-bottom: 22px;
}
.hero h1 {
  font-size: clamp(30px, 5vw, 44px);
  letter-spacing: .1em;
}
.hero h1 .dot { color: var(--cinnabar); }
.hero .subtitle {
  margin-top: 14px;
  color: var(--paper-dim);
  font-size: 18px;
  letter-spacing: .08em;
}
.hero .actions {
  margin-top: 28px;
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 22px;
  border-radius: 7px;
  border: 1px solid var(--line-2);
  background: var(--panel);
  color: var(--paper);
  font-family: var(--kai);
  font-size: 16px;
  letter-spacing: .06em;
  cursor: pointer;
  transition: all .18s ease;
  text-decoration: none;
}
.btn:hover {
  border-color: var(--cinnabar);
  color: var(--paper);
  background: var(--panel-2);
  transform: translateY(-1px);
}
.btn.primary {
  background: var(--cinnabar);
  border-color: var(--cinnabar);
  color: #f8f0e4;
  box-shadow: 0 6px 18px rgba(194,71,45,.28);
}
.btn.primary:hover { background: var(--cinnabar-soft); border-color: var(--cinnabar-soft); }
.btn.ghost { background: transparent; }

/* ============================ 卡片网格 ============================ */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
  gap: 16px;
}

.card {
  display: block;
  padding: 20px 18px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: transform .2s ease, border-color .2s ease, background .2s ease;
  position: relative;
  overflow: hidden;
}
.card:hover {
  transform: translateY(-3px);
  border-color: var(--line-2);
  background: var(--panel-2);
}
.card .card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 10px;
}
.card .glyph {
  width: 38px; height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  background: rgba(194,71,45,.12);
  color: var(--cinnabar-soft);
  font-size: 20px;
  flex: none;
}
.card h3 { font-size: 18px; letter-spacing: .05em; }
.card .meta {
  margin-top: 6px;
  color: var(--paper-dim);
  font-size: 14.5px;
  line-height: 1.6;
}
.card .tag {
  font-size: 12px;
  color: var(--paper-faint);
  font-family: var(--mono);
  letter-spacing: .04em;
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 1px 6px;
  white-space: nowrap;
}
.card .go {
  margin-top: 12px;
  font-size: 14px;
  color: var(--gold);
  letter-spacing: .08em;
}
.card .go::after { content: " →"; }

/* 官方网站卡片上的红色小角标 */
.card.ext::before {
  content: "官方";
  position: absolute;
  top: 12px; right: -30px;
  transform: rotate(45deg);
  width: 100px;
  text-align: center;
  font-size: 12px;
  letter-spacing: .1em;
  background: var(--cinnabar);
  color: #f6eee2;
  padding: 2px 0;
  opacity: .9;
}

/* ============================ 表单与工具面板 ============================ */
.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
}

label {
  display: block;
  margin-bottom: 8px;
  color: var(--paper-dim);
  font-size: 15px;
  letter-spacing: .05em;
}

input[type="text"],
input[type="search"],
input[type="password"],
input[type="number"],
textarea,
select {
  width: 100%;
  padding: 11px 13px;
  background: var(--ink-2);
  border: 1px solid var(--line-2);
  border-radius: 6px;
  color: var(--paper);
  font-family: var(--kai);
  font-size: 16px;
  letter-spacing: .03em;
  transition: border-color .15s ease;
}
textarea { resize: vertical; min-height: 110px; line-height: 1.6; }
input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--cinnabar);
  box-shadow: 0 0 0 3px rgba(194,71,45,.16);
}
input::placeholder, textarea::placeholder { color: var(--paper-faint); }
select { cursor: pointer; }
select option { background: var(--panel); color: var(--paper); }

.form-row { display: flex; gap: 12px; align-items: flex-end; flex-wrap: wrap; }
.form-row .grow { flex: 1; min-width: 180px; }

.output {
  margin-top: 16px;
  background: var(--ink-2);
  border: 1px dashed var(--line-2);
  border-radius: 6px;
  padding: 14px 16px;
  font-family: var(--mono);
  font-size: 14px;
  word-break: break-all;
  white-space: pre-wrap;
  color: var(--gold);
  min-height: 46px;
}
.output:empty::before { content: "（结果会显示在这里）"; color: var(--paper-faint); font-family: var(--kai); }

.hint { margin-top: 10px; font-size: 13.5px; color: var(--paper-faint); }
.hint a { color: var(--paper-dim); text-decoration: underline; }
.hint a:hover { color: var(--cinnabar-soft); }

.err-text { color: var(--err); }
.ok-text { color: var(--ok); }

/* 按钮组 */
.btn-row { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 14px; }
.btn.small { padding: 8px 14px; font-size: 14px; }
.btn.danger { border-color: var(--err); color: var(--err); background: transparent; }
.btn.danger:hover { background: rgba(184,86,75,.12); border-color: var(--err); }

/* ============================ 选项卡 ============================ */
.tabs { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 18px; }
.tab {
  padding: 8px 16px;
  border: 1px solid var(--line-2);
  background: var(--panel);
  border-radius: 6px;
  color: var(--paper-dim);
  cursor: pointer;
  font-family: var(--kai);
  font-size: 15px;
  letter-spacing: .05em;
  transition: all .15s ease;
}
.tab:hover { color: var(--paper); background: var(--panel-2); }
.tab.on {
  background: var(--cinnabar);
  border-color: var(--cinnabar);
  color: #f8f0e4;
}

/* ============================ 计算器 ============================ */
.calc-wrap { max-width: 400px; margin: 0 auto; }
.calc-display {
  background: var(--ink-2);
  border: 1px solid var(--line-2);
  border-radius: 8px;
  padding: 16px 18px;
  margin-bottom: 14px;
  text-align: right;
  min-height: 74px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
}
.calc-expr {
  font-family: var(--mono);
  color: var(--paper-faint);
  font-size: 14px;
  min-height: 1.3em;
  word-break: break-all;
}
.calc-result {
  font-family: var(--mono);
  font-size: 30px;
  color: var(--paper);
  word-break: break-all;
}
.calc-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 9px;
}
.calc-btn {
  padding: 16px 0;
  font-family: var(--mono);
  font-size: 18px;
  border: 1px solid var(--line-2);
  border-radius: 7px;
  background: var(--panel-2);
  color: var(--paper);
  cursor: pointer;
  transition: all .12s ease;
}
.calc-btn:hover { border-color: var(--cinnabar); background: #2a231c; }
.calc-btn:active { transform: scale(.97); }
.calc-btn.op { color: var(--gold); }
.calc-btn.eq { background: var(--cinnabar); border-color: var(--cinnabar); color: #f8f0e4; }
.calc-btn.eq:hover { background: var(--cinnabar-soft); }
.calc-btn.fn { color: var(--paper-dim); }
.calc-btn.span2 { grid-column: span 2; }

/* ============================ 哈希结果行 ============================ */
.hash-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px dashed var(--line);
  flex-wrap: wrap;
}
.hash-row:last-child { border-bottom: none; }
.hash-label {
  width: 74px;
  color: var(--paper-dim);
  font-size: 14px;
  flex: none;
  font-family: var(--mono);
}
.hash-value {
  flex: 1;
  min-width: 200px;
  font-family: var(--mono);
  font-size: 13.5px;
  color: var(--gold);
  word-break: break-all;
}

/* ============================ IP 信息 ============================ */
.kv {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  margin-top: 16px;
}
.kv .k, .kv .v {
  padding: 11px 14px;
  background: var(--panel);
}
.kv .k {
  color: var(--paper-dim);
  letter-spacing: .05em;
  font-size: 15px;
}
.kv .v {
  color: var(--paper);
  word-break: break-all;
  font-family: var(--mono);
  font-size: 14px;
}

/* ============================ 页脚 ============================ */
.site-footer {
  border-top: 1px solid var(--line);
  margin-top: 40px;
  padding: 40px 0 46px;
  color: var(--paper-dim);
  font-size: 15px;
}
.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 8px;
}
.footer-inner .seal {
  height: 44px;
  padding: 0 18px;
  font-size: 20px;
  margin-bottom: 6px;
}
.footer-line { letter-spacing: .06em; }
.footer-line .accent { color: var(--cinnabar-soft); }
.footer-meta { font-size: 13px; color: var(--paper-faint); font-family: var(--mono); }
.footer-meta a { color: var(--paper-faint); }
.footer-meta a:hover { color: var(--cinnabar-soft); }

/* ============================ 滚动浮现动画 ============================ */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .6s cubic-bezier(.22,.61,.36,1), transform .6s cubic-bezier(.22,.61,.36,1);
  will-change: opacity, transform;
}
.reveal.revealed { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  * { transition-duration: .01ms !important; animation-duration: .01ms !important; }
}

/* ============================ 响应式 ============================ */
@media (max-width: 640px) {
  body { font-size: 16px; }
  .nav { height: 58px; }
  .brand-name { font-size: 18px; }
  .section-title { font-size: 23px; }
  .section-title .en { display: none; }
  .grid { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); }
  .kv { grid-template-columns: 110px 1fr; }
  .hero h1 { letter-spacing: .06em; }
  .form-row { flex-direction: column; align-items: stretch; }
}