/* ============================================================
   组件层：导航、首屏、信封、跑马灯、信墙、表单、台账、邮戳
   ============================================================ */

/* ---------- 视图切换 ---------- */
.view { display: none; }
.view.active { display: block; animation: viewIn var(--dur-base) var(--ease-out); }
@keyframes viewIn { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: none; } }

.wrap { max-width: 1160px; margin: 0 auto; padding: 0 var(--space-4); position: relative; z-index: 1; }

/* ---------- 导航：发丝线下的报头 ---------- */
.masthead {
  border-bottom: 1px solid var(--color-line-strong);
  background: color-mix(in srgb, var(--color-bg) 88%, transparent);
  backdrop-filter: blur(6px);
  position: sticky; top: 0; z-index: 50;
}
.masthead .wrap {
  display: flex; align-items: center; justify-content: space-between;
  min-height: 64px; flex-wrap: wrap; gap: var(--space-2);
}
.brand { display: flex; align-items: baseline; gap: 10px; color: var(--color-text); text-decoration: none; }
.brand:hover { text-decoration: none; }
.brand b {
  font-family: var(--font-display); font-weight: 900;
  font-size: var(--text-lg); letter-spacing: .12em;
}
.brand span { font-family: var(--font-mono); font-size: var(--text-xs); color: var(--color-muted); letter-spacing: .18em; }
.menu { display: flex; gap: var(--space-2); list-style: none; flex-wrap: wrap; }
.menu a {
  display: inline-block; padding: 10px 12px; min-height: 44px;
  color: var(--color-text); font-size: var(--text-sm);
  border-bottom: 2px solid transparent;
  transition: border-color var(--dur-fast) ease-out;
}
.menu a:hover {
  text-decoration: none;
  border-bottom-color: var(--color-accent);
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-body); font-size: var(--text-base);
  padding: 12px 24px; min-height: 44px;
  border: 1.5px solid var(--color-primary);
  background: var(--color-primary); color: var(--color-on-primary);
  border-radius: var(--radius-md); cursor: pointer;
  box-shadow: var(--shadow-1);
  transition: transform var(--dur-fast) ease-out, box-shadow var(--dur-fast) ease-out, background var(--dur-fast) ease-out;
}
.btn:hover { background: var(--color-primary-deep); transform: translateY(-2px); box-shadow: var(--shadow-2); text-decoration: none; }
.btn:active { transform: translateY(0); }
.btn.ghost { background: transparent; color: var(--color-primary); }
.btn.ghost:hover { background: rgba(29, 91, 69, .08); }
.btn.small { padding: 6px 14px; min-height: 36px; font-size: var(--text-sm); }
.btn.red { border-color: var(--color-accent); background: var(--color-accent); color: #fdf6ec; }
.btn.red:hover { background: #a33519; }

/* ---------- 首屏：非对称排版 ---------- */
.hero { padding: var(--space-7) 0 var(--space-6); overflow: hidden; }
.hero-grid {
  display: grid; grid-template-columns: 1.15fr .85fr;
  gap: var(--space-6); align-items: center;
}
.kicker {
  font-family: var(--font-mono); font-size: var(--text-xs);
  letter-spacing: .32em; color: var(--color-primary);
  display: inline-flex; align-items: center; gap: 12px;
}
.kicker::before { content: ""; width: 40px; height: 1px; background: var(--color-primary); }
.hero h1 {
  font-size: var(--text-hero);
  margin: var(--space-3) 0 var(--space-4);
}
.hero h1 em {
  font-style: normal;
  color: var(--color-primary);
  position: relative;
}
.hero h1 em::after {  /* 记忆点之一：日期下的邮戳红圈 */
  content: ""; position: absolute; left: -2%; right: -2%; bottom: .04em;
  height: .5em; border: 2px solid var(--color-accent);
  border-radius: 50%; transform: rotate(-2deg); opacity: .55;
  pointer-events: none;
}
.hero .sub { color: var(--color-muted); max-width: 34em; font-size: var(--text-lg); }
.hero .actions { display: flex; gap: var(--space-3); margin-top: var(--space-5); flex-wrap: wrap; }

/* 首屏信封：CSS 手绘航空信封 + 邮票邮戳 */
.envelope-scene { position: relative; justify-self: center; }
.envelope {
  width: min(420px, 84vw); aspect-ratio: 3 / 2;
  background: var(--color-surface);
  border: 1px solid var(--color-line-strong);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-3);
  transform: rotate(-3deg);
  position: relative;
  animation: floaty 7s ease-in-out infinite;
}
@keyframes floaty { 0%, 100% { transform: rotate(-3deg) translateY(0); } 50% { transform: rotate(-2.2deg) translateY(-10px); } }
.envelope::before {  /* 航空信封斜纹边 */
  content: ""; position: absolute; inset: 8px;
  border: 10px solid transparent;
  border-image: var(--airmail) 10;
  pointer-events: none;
}
.envelope .flap {
  position: absolute; inset: 8px 8px auto 8px; height: 52%;
  background: linear-gradient(178deg, var(--color-surface-2), var(--color-surface) 90%);
  clip-path: polygon(0 0, 100% 0, 50% 100%);
  border-bottom: 1px solid var(--color-line);
}
.envelope .address {
  position: absolute; left: 12%; right: 12%; bottom: 14%;
  font-family: var(--font-body);
}
.envelope .address .line { border-bottom: 1px solid var(--color-line-strong); height: 2em; }
.envelope .address .to {
  font-family: var(--font-mono); font-size: var(--text-xs);
  color: var(--color-muted); letter-spacing: .28em; margin-bottom: 6px;
}
/* 邮票 */
.stamp {
  position: absolute; top: 14%; right: 9%;
  width: 72px; height: 88px;
  background: var(--color-primary);
  color: var(--color-on-primary);
  display: grid; place-items: center;
  font-family: var(--font-display); font-weight: 900; font-size: var(--text-sm);
  text-align: center; line-height: 1.3;
  padding: 6px;
  /* 锯齿邮票边 */
  --dot: 5px;
  -webkit-mask:
    radial-gradient(circle at 50% 0, transparent var(--dot), #000 calc(var(--dot) + .5px)) 50% 0 / 14px 14px,
    radial-gradient(circle at 50% 100%, transparent var(--dot), #000 calc(var(--dot) + .5px)) 50% 100% / 14px 14px,
    radial-gradient(circle at 0 50%, transparent var(--dot), #000 calc(var(--dot) + .5px)) 0 50% / 14px 14px,
    radial-gradient(circle at 100% 50%, transparent var(--dot), #000 calc(var(--dot) + .5px)) 100% 50% / 14px 14px;
  -webkit-mask-composite: source-in;
  mask-composite: intersect;
}
/* 圆形邮戳 */
.postmark {
  --stamp-tilt: -12deg;
  position: absolute; top: 6%; right: 2%;
  width: 108px; height: 108px; border-radius: 50%;
  border: 2.5px dashed var(--color-accent);
  color: var(--color-accent);
  display: grid; place-content: center; gap: 2px;
  font-family: var(--font-mono); font-size: 10px; text-align: center;
  letter-spacing: .12em; line-height: 1.5;
  transform: rotate(var(--stamp-tilt));
  background: rgba(245, 239, 227, .6);
}
.postmark b { font-family: var(--font-display); font-size: var(--text-sm); letter-spacing: .3em; }
.hero-note {
  position: absolute; bottom: -18px; left: -12px;
  font-family: var(--font-mono); font-size: var(--text-xs);
  color: var(--color-muted); transform: rotate(2deg);
}

/* ---------- 铅封条跑马灯 ---------- */
.ticker {
  background: var(--color-primary);
  color: var(--color-on-primary);
  overflow: hidden; white-space: nowrap;
  border-block: 1px solid var(--color-primary-deep);
  padding: 10px 0;
}
.ticker-track { display: inline-block; animation: marquee 26s linear infinite; }
.ticker:hover .ticker-track { animation-play-state: paused; }
.ticker span { font-family: var(--font-mono); font-size: var(--text-sm); letter-spacing: .22em; margin-right: 3.5em; }
@keyframes marquee { to { transform: translateX(-50%); } }

/* ---------- 区块标题 ---------- */
.section { padding: var(--space-7) 0; }
.section-head { display: flex; align-items: baseline; gap: var(--space-3); margin-bottom: var(--space-5); flex-wrap: wrap; }
.section-head h2 { font-size: var(--text-2xl); }
.section-head .mono { color: var(--color-muted); font-size: var(--text-xs); letter-spacing: .26em; }
.section-head .rule { flex: 1; height: 1px; background: var(--color-line-strong); min-width: 60px; }

/* ---------- 信墙：明信片，纵向错落 ---------- */
.wall { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-5); }
.postcard {
  background: var(--color-surface);
  border: 1px solid var(--color-line-strong);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-2);
  padding: var(--space-4);
  position: relative;
  transition: transform var(--dur-base) var(--ease-out), box-shadow var(--dur-base) var(--ease-out);
}
.postcard:nth-child(odd) { transform: rotate(-1.1deg); }
.postcard:nth-child(even) { transform: rotate(1.1deg) translateY(18px); }
.postcard:hover { transform: rotate(0) translateY(-4px); box-shadow: var(--shadow-3); z-index: 2; }
.postcard::before {  /* 顶部航空斜纹 */
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 8px;
  border-radius: var(--radius-md) var(--radius-md) 0 0;
  background: var(--airmail); opacity: .85;
}
.postcard h3 { font-size: var(--text-lg); margin: var(--space-3) 0 var(--space-2); }
.postcard .excerpt { color: var(--color-muted); font-size: var(--text-base); }
.postcard .from {
  margin-top: var(--space-3); padding-top: var(--space-2);
  border-top: 1px dashed var(--color-line-strong);
  display: flex; justify-content: space-between; gap: var(--space-2);
  font-family: var(--font-mono); font-size: var(--text-xs); color: var(--color-muted);
  flex-wrap: wrap;
}
.postcard .mini-stamp {
  position: absolute; top: 20px; right: 18px;
  width: 44px; height: 54px;
  border: 1.5px dashed var(--color-accent); border-radius: 2px;
  transform: rotate(8deg);
  display: grid; place-items: center;
  font-family: var(--font-display); font-weight: 900;
  font-size: var(--text-xs); color: var(--color-accent);
  writing-mode: vertical-rl; letter-spacing: .2em;
  opacity: .85;
}
/* 空信墙 */
.empty {
  border: 1.5px dashed var(--color-line-strong);
  border-radius: var(--radius-md);
  padding: var(--space-6); text-align: center; color: var(--color-muted);
}

/* ---------- 表单：一张信纸 ---------- */
.sheet {
  background: var(--color-surface);
  border: 1px solid var(--color-line-strong);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-3);
  padding: var(--space-5);
  max-width: 720px; margin: 0 auto;
  position: relative;
}
.sheet::before {  /* 左侧装订孔 */
  content: ""; position: absolute; left: 14px; top: 8%; bottom: 8%;
  width: 10px;
  background-image: radial-gradient(circle, var(--color-bg) 3.5px, transparent 4px);
  background-size: 10px 44px;
  border-right: 1px solid var(--color-line);
}
.sheet.narrow { max-width: 440px; }
.sheet-head { border-bottom: 2px solid var(--color-text); padding-bottom: var(--space-3); margin-bottom: var(--space-4); display: flex; justify-content: space-between; align-items: baseline; gap: var(--space-2); flex-wrap: wrap; }
.sheet-head h2 { font-size: var(--text-xl); }
.sheet-head .mono { font-size: var(--text-xs); color: var(--color-muted); letter-spacing: .2em; }
.field { margin-bottom: var(--space-4); }
.field label {
  display: flex; justify-content: space-between; align-items: baseline;
  font-family: var(--font-mono); font-size: var(--text-xs);
  letter-spacing: .2em; color: var(--color-muted);
  margin-bottom: 6px;
}
.field input, .field textarea {
  width: 100%;
  font-family: var(--font-body); font-size: var(--text-lg);
  color: var(--color-text);
  background: transparent;
  border: none; border-bottom: 1px solid var(--color-line-strong);
  padding: 10px 4px;
  transition: border-color var(--dur-fast) ease-out, background var(--dur-fast) ease-out;
}
.field textarea { resize: vertical; min-height: 140px; line-height: 32px;
  /* 信纸格线 */
  background-image: repeating-linear-gradient(0deg, transparent 0 31px, rgba(42, 36, 27, .1) 31px 32px);
}
.field input:focus, .field textarea:focus { outline: none; border-bottom: 2px solid var(--color-primary); background: rgba(29, 91, 69, .04); }
.field input::placeholder, .field textarea::placeholder { color: rgba(111, 101, 84, .55); }
/* 邮票式复选 */
.stamps-check { display: flex; gap: var(--space-3); flex-wrap: wrap; margin-bottom: var(--space-4); }
.check-stamp {
  display: inline-flex; align-items: center; gap: 8px;
  border: 1.5px dashed var(--color-line-strong);
  border-radius: var(--radius-sm);
  padding: 10px 14px; min-height: 44px; cursor: pointer;
  color: var(--color-muted);
  transition: all var(--dur-fast) ease-out;
}
.check-stamp input { accent-color: var(--color-primary); width: 16px; height: 16px; cursor: pointer; }
.check-stamp:has(input:checked) {
  border-color: var(--color-primary); color: var(--color-primary);
  background: rgba(29, 91, 69, .06);
  transform: rotate(-1deg);
}

/* ---------- 台账（我的邮件 / 后台） ---------- */
.ledger {
  background: var(--color-surface);
  border: 1px solid var(--color-line-strong);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-2);
  overflow-x: auto;
}
.ledger table { width: 100%; border-collapse: collapse; min-width: 640px; }
.ledger th {
  font-family: var(--font-mono); font-size: var(--text-xs);
  letter-spacing: .2em; font-weight: 500;
  color: var(--color-on-primary);
  background: var(--color-primary);
  text-align: left; padding: 12px 16px; white-space: nowrap;
}
.ledger td { padding: 14px 16px; border-bottom: 1px solid var(--color-line); font-size: var(--text-base); }
.ledger tr:last-child td { border-bottom: none; }
.ledger tbody tr { transition: background var(--dur-fast) ease-out; }
.ledger tbody tr:hover { background: rgba(29, 91, 69, .05); }

/* 状态邮戳章 */
.seal {
  --stamp-tilt: -4deg;
  display: inline-block;
  font-family: var(--font-mono); font-size: var(--text-xs);
  letter-spacing: .14em;
  border: 1.5px solid currentColor; border-radius: 50%;
  padding: 5px 10px; line-height: 1.2;
  transform: rotate(var(--stamp-tilt));
  white-space: nowrap;
}
.seal.pending  { color: #8a6d1f; border-style: dashed; }
.seal.approved { color: var(--color-primary); }
.seal.sent     { color: var(--color-primary-deep); }
.seal.rejected { color: var(--color-accent); }
.seal.yes { color: var(--color-primary); }
.seal.no  { color: var(--color-muted); border-style: dashed; }

/* ---------- 提示纸条 ---------- */
.toast-wrap { position: fixed; top: 18px; left: 50%; transform: translateX(-50%); z-index: 200; }
.toast-note {
  background: var(--color-text);
  color: var(--color-bg);
  font-family: var(--font-body); font-size: var(--text-base);
  padding: 12px 22px;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-2);
  transform: rotate(-.6deg);
  opacity: 0; pointer-events: none;
  transition: opacity var(--dur-base) var(--ease-out), transform var(--dur-base) var(--ease-out);
}
.toast-note.show { opacity: 1; transform: rotate(-.6deg) translateY(6px); }

/* ---------- 页脚 ---------- */
.colophon {
  margin-top: var(--space-7);
  border-top: 1px solid var(--color-line-strong);
  padding: var(--space-5) 0 var(--space-6);
  color: var(--color-muted);
  display: flex; justify-content: space-between; gap: var(--space-3); flex-wrap: wrap;
  font-size: var(--text-sm);
}
.colophon .mono { font-size: var(--text-xs); letter-spacing: .2em; }

/* ---------- 后台入口（右下角小木牌） ---------- */
.counter-entry {
  position: fixed; right: 18px; bottom: 18px; z-index: 90;
}
.counter-entry a {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--color-surface);
  border: 1px solid var(--color-line-strong);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-2);
  padding: 10px 16px; min-height: 44px;
  color: var(--color-text); font-size: var(--text-sm);
  transform: rotate(1.5deg);
  transition: transform var(--dur-fast) ease-out;
}
.counter-entry a:hover { transform: rotate(0) translateY(-2px); text-decoration: none; }

/* ---------- 响应式 ---------- */
@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; }
  .envelope-scene { margin-top: var(--space-5); }
  .wall { grid-template-columns: 1fr 1fr; }
  .postcard:nth-child(even) { transform: rotate(1.1deg); }
}
@media (max-width: 600px) {
  .wall { grid-template-columns: 1fr; }
  .hero { padding-top: var(--space-6); }
  .postmark { width: 84px; height: 84px; font-size: 9px; }
}