/* ==========================================================================
   OAHZ 站点样式 —— 设计语言：工业规格表 × 编辑杂志
   浅色纸底 / 墨黑 / 单一强调橙；细线、刻度、等宽标签、重标题
   ========================================================================== */

:root {
  --paper: #F4F1E9;
  --paper-2: #ECE8DC;
  --card: #FFFDF6;
  --ink: #16140F;
  --ink-2: #23201A;
  --muted: #6E6A5C;
  --accent: #FF4D00;
  --accent-deep: #D63F00;
  --line: #D8D2C2;
  --line-dark: #35322A;
  --grid-line: rgba(22, 20, 15, 0.06);
  --ok: #1B9E55;
  --beta: #C77800;
  --dev: #8A8578;
  --sans: "Space Grotesk", "PingFang SC", "Microsoft YaHei UI", "Microsoft YaHei", system-ui, sans-serif;
  --mono: "IBM Plex Mono", "JetBrains Mono", Consolas, "SF Mono", "PingFang SC", "Microsoft YaHei", monospace;
  --nav-h: 64px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}

::selection { background: var(--accent); color: #fff; }

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
ul, ol { list-style: none; }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

section[id] { scroll-margin-top: calc(var(--nav-h) + 20px); }

.mono { font-family: var(--mono); }

.container {
  width: min(1240px, 100% - clamp(40px, 8vw, 96px));
  margin-inline: auto;
}

/* ---------- 顶部导航 ---------- */
.nav {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  height: var(--nav-h);
  background: rgba(244, 241, 233, 0.88);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.nav__inner {
  height: 100%;
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav__logo {
  font-weight: 700;
  font-size: 21px;
  letter-spacing: 0.05em;
}
/* 品牌字标：OA + 频率单位 Hz（上标式橙色，呼应"创新的频率"） */
.nav__logo i {
  font-style: normal;
  color: var(--accent);
  font-size: 0.72em;
  letter-spacing: 0.04em;
  vertical-align: 0.45em;
  margin-left: 0.05em;
}

.nav__links {
  display: flex;
  gap: clamp(16px, 2.6vw, 34px);
  margin-left: auto;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.08em;
}
.nav__links a { position: relative; padding: 6px 0; color: var(--ink-2); }
.nav__links a b { color: var(--accent); font-weight: 500; margin-right: 4px; }
.nav__links a::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 0; height: 2px;
  background: var(--accent);
  transition: width 0.25s ease;
}
.nav__links a:hover::after { width: 100%; }

.nav__status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted);
  border: 1px solid var(--line);
  padding: 5px 12px;
  white-space: nowrap;
}

.dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  display: inline-block;
  flex: none;
}
.dot.ok   { background: var(--ok); }
.dot.beta { background: var(--beta); }
.dot.dev  { background: var(--dev); }
.nav__status .dot { animation: pulse 2s ease infinite; }

@keyframes pulse {
  0%   { box-shadow: 0 0 0 0 rgba(27, 158, 85, 0.45); }
  70%  { box-shadow: 0 0 0 7px rgba(27, 158, 85, 0); }
  100% { box-shadow: 0 0 0 0 rgba(27, 158, 85, 0); }
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 26px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.02em;
  border: 1px solid var(--ink);
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}
.btn--solid { background: var(--ink); color: var(--paper); }
.btn--solid:hover { background: var(--accent); border-color: var(--accent); color: #fff; transform: translateY(-2px); }
.btn--ghost { background: transparent; color: var(--ink); }
.btn--ghost:hover { background: var(--ink); color: var(--paper); transform: translateY(-2px); }
.sec--dark .btn--ghost { border-color: var(--paper); color: var(--paper); }
.sec--dark .btn--ghost:hover { background: var(--paper); color: var(--ink); }
/* 深色区块内的实心按钮反转为纸色，避免黑底上不可见 */
.sec--dark .btn--solid { background: var(--paper); border-color: var(--paper); color: var(--ink); }
.sec--dark .btn--solid:hover { background: var(--accent); border-color: var(--accent); color: #fff; }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: calc(var(--nav-h) + clamp(64px, 12vh, 140px)) 0 clamp(88px, 11vh, 140px);
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 78px 78px;
  overflow: hidden;
}

.hero .container { position: relative; z-index: 1; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--muted);
}
.eyebrow::before {
  content: "";
  width: 10px; height: 10px;
  background: var(--accent);
  flex: none;
}

.hero__title {
  margin-top: 28px;
  font-size: clamp(42px, 7.4vw, 102px);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: 0.005em;
}
.hero__title em {
  font-style: normal;
  color: var(--accent);
  position: relative;
  white-space: nowrap;
}

.hero__sub {
  margin-top: 30px;
  max-width: 640px;
  font-size: clamp(16px, 1.6vw, 19px);
  color: var(--muted);
}

.hero__cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  margin-top: 44px;
}

.hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 0;
  margin-top: 72px;
  font-family: var(--mono);
  font-size: 12.5px;
  letter-spacing: 0.16em;
  color: var(--muted);
}
.hero__meta span { display: inline-flex; align-items: center; }
.hero__meta span + span::before { content: "/"; margin: 0 18px; color: var(--line); }

.hero__ghost {
  position: absolute;
  right: -0.12em;
  bottom: -0.55em;
  z-index: 0;
  font-size: clamp(150px, 23vw, 330px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.02em;
  color: transparent;
  -webkit-text-stroke: 1.5px rgba(22, 20, 15, 0.13);
  user-select: none;
  pointer-events: none;
}
.hero__ghost i {
  font-style: normal;
  -webkit-text-stroke-color: rgba(255, 77, 0, 0.4);
}

.hero__stamp {
  position: absolute;
  top: clamp(120px, 22vh, 220px);
  right: clamp(28px, 6vw, 84px);
  width: 128px; height: 128px;
  z-index: 1;
}
.hero__stamp svg { width: 100%; height: 100%; animation: spin 24s linear infinite; }
.hero__stamp svg text {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.22em;
  fill: var(--ink-2);
}
.hero__stamp i {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  color: var(--accent);
  font-style: normal;
}

@keyframes spin { to { transform: rotate(360deg); } }

.plus {
  position: absolute;
  font-family: var(--mono);
  font-size: 18px;
  color: var(--line);
  user-select: none;
  pointer-events: none;
}

/* ---------- 跑马灯 ---------- */
.ticker {
  overflow: hidden;
  background: var(--accent);
  color: var(--ink);
  border-block: 1px solid var(--ink);
}
.ticker__track {
  display: flex;
  width: max-content;
  animation: tick 28s linear infinite;
}
.ticker:hover .ticker__track { animation-play-state: paused; }
.ticker__item {
  display: inline-flex;
  align-items: center;
  padding: 13px 0;
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.18em;
  white-space: nowrap;
}
.ticker__item::after { content: "×"; margin: 0 1.6em; font-weight: 400; }

@keyframes tick { to { transform: translateX(-50%); } }

/* ---------- 区块通用 ---------- */
.sec {
  position: relative;
  padding: clamp(80px, 11vw, 136px) 0;
}
.sec--dark { background: var(--ink); color: var(--paper); }
.sec--tint  { background: var(--paper-2); border-block: 1px solid var(--line); }

.sec-head { position: relative; margin-bottom: clamp(44px, 6vw, 72px); }
.sec-head__index {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.2em;
  color: var(--accent);
}
.sec-head__index::after {
  content: "";
  display: inline-block;
  width: 56px; height: 1px;
  background: currentColor;
  vertical-align: middle;
  margin-left: 14px;
  opacity: 0.6;
}
.sec-head h2 {
  margin-top: 18px;
  font-size: clamp(32px, 4.8vw, 62px);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: 0.01em;
}
.sec-head p {
  margin-top: 18px;
  max-width: 560px;
  color: var(--muted);
  font-size: 16.5px;
}
.sec--dark .sec-head p { color: #A9A493; }

/* ---------- 01 理念 ---------- */
.idea-quote {
  font-size: clamp(21px, 2.6vw, 34px);
  font-weight: 700;
  line-height: 1.5;
  max-width: 880px;
}
.idea-quote em { font-style: normal; color: var(--accent); }

.idea-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(28px, 4vw, 56px);
  margin-top: clamp(56px, 8vw, 96px);
}
.idea-item { border-top: 1px solid var(--line-dark); padding-top: 26px; }
.idea-item:nth-child(2) { margin-top: 44px; }
.idea-item:nth-child(3) { margin-top: 88px; }
.idea-item .mono { font-size: 13px; color: var(--accent); letter-spacing: 0.12em; }
.idea-item h3 { font-size: 21px; font-weight: 700; margin: 14px 0 10px; }
.idea-item p { font-size: 15px; color: #A9A493; }

/* ---------- 02 创作思路 ---------- */
.why-grid {
  display: grid;
  grid-template-columns: 1.05fr minmax(360px, 460px);
  gap: clamp(48px, 6vw, 88px);
  align-items: start;
}

.why-points { margin-top: 8px; }
.why-point {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 18px;
  padding: 26px 0;
  border-top: 1px solid var(--line);
}
.why-point:last-child { border-bottom: 1px solid var(--line); }
.why-point .mono { font-size: 22px; font-weight: 500; color: var(--accent); line-height: 1.2; }
.why-point h3 { font-size: 20px; font-weight: 700; }
.why-point p { margin-top: 8px; font-size: 15px; color: var(--muted); }

/* 收据 */
.receipt-wrap { position: relative; }
.receipt {
  position: relative;
  background: var(--card);
  border: 1px solid var(--line);
  box-shadow: 0 30px 60px -24px rgba(22, 20, 15, 0.35);
  padding: 30px 28px 0;
  font-family: var(--mono);
  font-size: 14px;
  transform: rotate(1.6deg);
}
.receipt__tear {
  height: 14px;
  background:
    linear-gradient(-45deg, var(--card) 8px, transparent 0),
    linear-gradient(45deg, var(--card) 8px, transparent 0);
  background-position: left top;
  background-repeat: repeat-x;
  background-size: 16px 16px;
  filter: drop-shadow(0 10px 14px rgba(22, 20, 15, 0.18));
  margin-top: 26px;
}
.receipt__head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding-bottom: 16px;
  border-bottom: 1px dashed #B8B29D;
  letter-spacing: 0.06em;
}
.receipt__head b { font-size: 15px; }
.receipt__head span { font-size: 11.5px; color: var(--muted); }

.receipt__row {
  display: flex;
  align-items: baseline;
  padding: 13px 0;
  font-size: 13.5px;
}
.receipt__row .leader {
  flex: 1;
  border-bottom: 1px dotted #B8B29D;
  margin: 0 10px;
  transform: translateY(-4px);
}
.receipt__row del { color: var(--muted); text-decoration-color: var(--accent); text-decoration-thickness: 2px; }
.receipt__row .cut {
  margin-left: 10px;
  font-size: 11px;
  color: var(--accent);
  white-space: nowrap;
  letter-spacing: 0.08em;
}
.receipt__row--keep { font-weight: 600; }

.receipt__total {
  border-top: 1px dashed #B8B29D;
  margin-top: 6px;
  padding: 16px 0 20px;
}
.receipt__total .receipt__row { padding: 6px 0; font-size: 14px; }
.receipt__row--final {
  font-size: 16px !important;
  font-weight: 700;
}
.receipt__row--final .price { color: var(--accent); font-size: 20px; }

.receipt__note {
  padding-bottom: 8px;
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0.04em;
}

.stamp {
  position: absolute;
  z-index: 2;
  top: -24px;
  right: -18px;
  padding: 12px 20px;
  border: 2.5px solid var(--accent);
  color: var(--accent);
  font-weight: 800;
  font-size: 15px;
  letter-spacing: 0.3em;
  transform: rotate(-8deg);
  background: rgba(255, 77, 0, 0.04);
  text-indent: 0.3em;
  white-space: nowrap;
}
.stamp::before {
  content: "";
  position: absolute;
  inset: 3px;
  border: 1px solid var(--accent);
}

/* ---------- 03 项目列表 ---------- */
.prow {
  position: relative;
  display: grid;
  grid-template-columns: 72px 40px minmax(0, 1fr) auto auto 48px;
  grid-template-areas: "thumb no main tags status arrow";
  align-items: center;
  gap: 20px;
  padding: 24px clamp(12px, 2vw, 24px);
  border-top: 1px solid var(--line);
  transition: background 0.22s ease, color 0.22s ease, padding-left 0.22s ease;
  overflow: hidden;
}
.prow:last-of-type { border-bottom: 1px solid var(--line); }
.prow::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(260px circle at var(--mx, 50%) var(--my, 50%), rgba(255, 255, 255, 0.09), transparent 65%);
  opacity: 0;
  transition: opacity 0.25s ease;
  pointer-events: none;
}
.prow:hover { background: var(--ink); color: var(--paper); padding-left: clamp(20px, 3vw, 36px); }
.prow:hover::after { opacity: 1; }

.prow__thumb {
  grid-area: thumb;
  width: 64px; height: 64px;
  display: grid;
  place-items: center;
  background: repeating-linear-gradient(45deg, var(--line) 0 2px, transparent 2px 9px);
  border: 1px solid var(--line);
}
.prow__thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.prow__thumb span {
  font-size: 24px;
  font-weight: 800;
  background: var(--paper);
  width: 46px; height: 46px;
  display: grid;
  place-items: center;
}
.prow:hover .prow__thumb { border-color: var(--line-dark); }
.prow:hover .prow__thumb span { background: var(--ink); }

.prow__no { grid-area: no; font-size: 13px; color: var(--muted); }
.prow__main { grid-area: main; min-width: 0; }
.prow__name { display: block; font-size: clamp(20px, 2.2vw, 27px); font-weight: 700; line-height: 1.3; }
.prow__desc {
  display: block;
  margin-top: 4px;
  font-size: 14px;
  color: var(--muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.prow:hover .prow__desc { color: #A9A493; }

.prow__tags { grid-area: tags; font-size: 12.5px; color: var(--muted); letter-spacing: 0.04em; white-space: nowrap; }
.prow:hover .prow__tags { color: #A9A493; }

.prow__status {
  grid-area: status;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  white-space: nowrap;
}

.prow__arrow { grid-area: arrow; justify-self: end; opacity: 0.35; transform: translateX(-6px); transition: 0.25s ease; }
.prow:hover .prow__arrow { opacity: 1; transform: none; color: var(--accent); }

.projects-note {
  margin-top: 28px;
  text-align: right;
  font-family: var(--mono);
  font-size: 12.5px;
  letter-spacing: 0.12em;
  color: var(--muted);
}

/* ---------- 04 联系 ---------- */
.contact-title { font-size: clamp(36px, 5.6vw, 76px); font-weight: 800; line-height: 1.15; }
.contact-title em { font-style: normal; color: var(--accent); }
.contact-mail {
  display: inline-block;
  margin-top: 34px;
  font-family: var(--mono);
  font-size: clamp(17px, 2.4vw, 26px);
  color: var(--paper);
  border-bottom: 3px solid var(--accent);
  padding-bottom: 5px;
  transition: color 0.2s ease;
}
.contact-mail:hover { color: var(--accent); }
.contact__cta { display: flex; flex-wrap: wrap; gap: 16px; margin-top: 44px; }

/* ---------- 页脚 ---------- */
.footer { background: var(--ink); color: var(--paper); border-top: 1px solid var(--line-dark); }
.footer__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  padding: clamp(40px, 6vw, 64px) 0 40px;
}
.footer__word {
  font-size: clamp(72px, 12vw, 160px);
  font-weight: 700;
  line-height: 0.9;
  letter-spacing: 0.03em;
  color: transparent;
  -webkit-text-stroke: 1.5px rgba(244, 241, 233, 0.24);
  user-select: none;
}
.footer__word i {
  font-style: normal;
  -webkit-text-stroke-color: rgba(255, 77, 0, 0.7);
}
.footer__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 28px;
  font-family: var(--mono);
  font-size: 12.5px;
  color: #A9A493;
  letter-spacing: 0.06em;
}
.footer__meta a:hover { color: var(--accent); }

/* ---------- 详情页 ---------- */
.crumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding-top: calc(var(--nav-h) + 28px);
  font-size: 12.5px;
  color: var(--muted);
  letter-spacing: 0.06em;
}
.crumbs a:hover { color: var(--accent); }
.crumbs b { color: var(--ink); font-weight: 500; }

.d-hero { padding: clamp(36px, 6vw, 72px) 0 clamp(40px, 6vw, 64px); border-bottom: 1px solid var(--line); }
.d-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.d-hero__meta span {
  border: 1px solid var(--line);
  padding: 4px 12px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
}
.d-hero__meta span:first-child { border-color: var(--accent); color: var(--accent); }
.d-hero__name {
  margin-top: 26px;
  font-size: clamp(38px, 6.4vw, 88px);
  font-weight: 800;
  line-height: 1.1;
}
.d-hero__slogan { margin-top: 18px; font-size: clamp(17px, 2vw, 22px); color: var(--muted); }
.d-hero__cta { display: flex; flex-wrap: wrap; align-items: center; gap: 16px; margin-top: 38px; }
.d-hero__price {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  margin-left: 8px;
  font-size: 20px;
  font-weight: 700;
  color: var(--accent);
}
.d-hero__price i { font-size: 11px; font-style: normal; letter-spacing: 0.14em; color: var(--muted); }

.d-sec { padding: clamp(40px, 6vw, 64px) 0; border-bottom: 1px solid var(--line); }
.d-sec:last-of-type { border-bottom: 0; }
.d-sec__t {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.2em;
  color: var(--ink-2);
  margin-bottom: 28px;
}
.d-sec__t::before { content: ""; width: 10px; height: 10px; background: var(--accent); }

.gallery {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: min(680px, 82vw);
  gap: 18px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding-bottom: 14px;
}
.shot {
  scroll-snap-align: start;
  aspect-ratio: 16 / 10;
  border: 1px solid var(--line);
  background: var(--card);
  overflow: hidden;
}
.shot img { width: 100%; height: 100%; object-fit: cover; }
.shot--ph {
  display: grid;
  place-content: center;
  gap: 10px;
  text-align: center;
  background:
    repeating-linear-gradient(-45deg, rgba(22, 20, 15, 0.045) 0 10px, transparent 10px 24px),
    var(--card);
  border-style: dashed;
}
.shot--ph span { font-size: 15px; letter-spacing: 0.16em; color: var(--ink-2); }
.shot--ph em { font-family: var(--mono); font-style: normal; font-size: 12px; color: var(--muted); }

.d-grid {
  display: grid;
  grid-template-columns: 1.35fr 1fr;
  gap: clamp(40px, 6vw, 80px);
}
.d-desc p + p { margin-top: 16px; }
.d-desc p { color: var(--ink-2); }

.d-feats li {
  display: flex;
  gap: 12px;
  align-items: baseline;
  padding: 13px 0;
  border-top: 1px dashed var(--line);
  font-size: 15px;
}
.d-feats li:last-child { border-bottom: 1px dashed var(--line); }
.d-feats svg { flex: none; color: var(--accent); transform: translateY(2px); }

.d-specs { margin-top: 30px; }
.d-specs > div {
  display: flex;
  justify-content: space-between;
  padding: 10px 0;
  border-top: 1px solid var(--line);
  font-size: 13px;
}
.d-specs dt { color: var(--muted); }
.d-specs dd { font-weight: 500; }

.dl-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 16px; max-width: 760px; }
.dl-btn {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 16px;
  padding: 18px 22px;
  border: 1px solid var(--ink);
  transition: 0.2s ease;
}
.dl-btn:hover { background: var(--ink); color: var(--paper); }
.dl-btn__icon { display: grid; place-items: center; width: 42px; height: 42px; border: 1px solid currentColor; }
.dl-btn__txt b { display: block; font-size: 16px; }
.dl-btn__txt i { display: block; font-style: normal; font-size: 12px; color: var(--muted); margin-top: 2px; }
.dl-btn:hover .dl-btn__txt i { color: #A9A493; }
.dl-btn__tag { font-size: 11px; letter-spacing: 0.12em; color: var(--accent); white-space: nowrap; }
.dl-btn--soon { border-style: dashed; border-color: var(--muted); opacity: 0.75; cursor: not-allowed; }
.dl-btn--soon:hover { background: transparent; color: var(--ink); }

.dl-soon {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 22px;
  border: 1px dashed var(--muted);
  color: var(--muted);
  font-size: 15px;
}
.dl-note { margin-top: 22px; font-size: 12px; letter-spacing: 0.1em; color: var(--muted); }
.dl-note::before { content: ""; display: inline-block; width: 8px; height: 8px; background: var(--accent); margin-right: 10px; }

.d-log li {
  display: grid;
  grid-template-columns: 92px 120px 1fr;
  gap: 18px;
  padding: 16px 0;
  border-top: 1px dashed var(--line);
  font-size: 14.5px;
}
.d-log__v { color: var(--accent); font-weight: 500; }
.d-log__d { color: var(--muted); font-size: 13px; }

.d-nav {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 30px 0 60px;
  font-size: 13.5px;
}
.d-nav a:hover { color: var(--accent); }

/* ---------- 进入动效 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.7s ease var(--d, 0ms), transform 0.7s cubic-bezier(0.2, 0.7, 0.2, 1) var(--d, 0ms);
}
.reveal.in { opacity: 1; transform: none; }

/* ---------- 响应式 ---------- */
@media (max-width: 1200px) {
  .hero__stamp { display: none; }
}

@media (max-width: 1024px) {
  .why-grid { grid-template-columns: 1fr; }
  .receipt-wrap { max-width: 520px; }
  .d-grid { grid-template-columns: 1fr; }
}

@media (max-width: 860px) {
  .idea-grid { grid-template-columns: 1fr; }
  .idea-item:nth-child(n) { margin-top: 0; }

  .prow {
    grid-template-columns: 48px 1fr 36px;
    grid-template-areas:
      "thumb main arrow"
      "thumb status arrow";
    row-gap: 8px;
  }
  .prow__no, .prow__tags { display: none; }
  .prow__thumb { width: 48px; height: 48px; }
  .prow__thumb span { width: 34px; height: 34px; font-size: 18px; }
  .prow__desc { white-space: normal; }
}

@media (max-width: 720px) {
  .nav__links { display: none; }
  .nav__status { margin-left: auto; }

  /* 小屏：收窄容器留白，压低标题字号，保证每个分句一行 */
  .container { width: calc(100% - 44px); }
  .hero__title { font-size: clamp(30px, 8.4vw, 42px); }

  .hero { padding-bottom: 110px; }
  .hero__meta span + span::before { margin: 0 12px; }

  .d-log li { grid-template-columns: 76px 1fr; }
  .d-log__d { grid-column: 2; order: 3; }
  .d-log__n { grid-column: 1 / -1; }

  .stamp { right: 6px; font-size: 13px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .ticker__track, .hero__stamp svg, .nav__status .dot { animation: none; }
}