/* =========================================================
   IOT-TIME · 浅色复古增补层（轻量）
   暖纸色 / 方格纸 / 硬阴影 / 方形按钮 / 米色机身
   ========================================================= */

:root {
  --paper: #f7f1e4;
  --paper-2: #efe6d4;
  --white: #fffcf4;
  --ink: #191512;
  --ink-2: #3b352d;
  --muted: #6f675b;
  --muted-2: #7e7669;
  --line: #e0d3be;
  --line-2: #cbbba1;
  --dark: #161310;
  --dark-2: #1e1a15;
  --stage-a: #e7dcc8;
  --stage-b: #f4ecdd;
  --red-deep: #c7392b;
}

body {
  background-color: var(--paper);
  background-image: radial-gradient(rgba(25, 21, 18, 0.032) 0.6px, transparent 0.6px);
  background-size: 22px 22px;
}

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

/* ---------- 页头 ---------- */
.site-header.is-scrolled {
  background: rgba(247, 241, 228, 0.84);
}

.brand__suffix {
  border-left-color: var(--line-2);
}

/* ---------- 复古按钮与标签 ---------- */
.btn {
  border-radius: 6px;
  box-shadow: 3px 3px 0 rgba(25, 21, 18, 0.12);
}

.btn:hover {
  transform: translate(-1px, -1px);
  box-shadow: 4px 4px 0 rgba(25, 21, 18, 0.16);
}

.btn--primary {
  background: var(--ink);
}

.btn--ghost {
  background: rgba(255, 252, 244, 0.65);
  border-color: var(--line-2);
}

.badge {
  border-radius: 3px;
  background: rgba(255, 252, 244, 0.6);
}

.chip {
  border-radius: 3px;
  background: #faf3e3;
  border-color: var(--line);
}

.eyebrow {
  padding: 5px 8px;
  border: 1px solid var(--line-2);
  border-radius: 3px;
  background: rgba(255, 252, 244, 0.62);
  color: var(--muted);
}

.sec-head__top .hairline {
  height: 0;
  background: none;
  border-top: 1px dashed var(--line-2);
}

.band .eyebrow,
.cta .eyebrow {
  border-color: rgba(255, 255, 255, 0.18);
  background: transparent;
  color: #9aa09e;
}

.band .sec-head__top .hairline,
.cta .hairline {
  background: none;
  border-top: 1px dashed rgba(255, 255, 255, 0.14);
}

/* ---------- 复古首屏 ---------- */
.hero--retro {
  position: relative;
  padding-top: calc(var(--header) + 72px);
  background-color: var(--paper);
  background-image: radial-gradient(
      700px 460px at 82% 16%,
      rgba(255, 207, 150, 0.28),
      transparent 70%
    ),
    radial-gradient(560px 420px at 8% 92%, rgba(196, 220, 190, 0.22), transparent 72%);
  overflow: hidden;
}

.hero--retro::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(25, 21, 18, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(25, 21, 18, 0.045) 1px, transparent 1px);
  background-size: 28px 28px;
  -webkit-mask-image: radial-gradient(120% 90% at 66% 18%, #000 0%, transparent 78%);
  mask-image: radial-gradient(120% 90% at 66% 18%, #000 0%, transparent 78%);
  pointer-events: none;
}

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

.hero--retro .hero__grid {
  padding-bottom: 46px;
}

.hero--retro .hero__sub {
  color: var(--muted);
}

.hero--retro .hero__caption {
  color: #8b8173;
  text-align: left;
}

.hero__stamp {
  position: absolute;
  right: 5%;
  top: calc(var(--header) + 42px);
  z-index: 2;
  transform: rotate(5deg);
  padding: 5px 9px;
  border: 2px solid var(--red);
  border-radius: 3px;
  background: rgba(255, 252, 244, 0.55);
  color: var(--red);
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  opacity: 0.8;
}

/* HUD 变成米色机身 */
.hud {
  background: linear-gradient(180deg, #f4ead7 0%, #e8dbc4 100%);
  border: 1px solid #c9b89c;
  border-radius: 18px;
  box-shadow: 10px 10px 0 rgba(25, 21, 18, 0.07),
    inset 0 1px 0 rgba(255, 255, 255, 0.75);
}

.hud::before {
  background: radial-gradient(60% 40% at 50% 0%, rgba(255, 255, 255, 0.5), transparent 70%);
}

.hud::after {
  content: "";
  position: absolute;
  inset: 7px;
  border: 1px dashed rgba(25, 21, 18, 0.14);
  border-radius: 12px;
  pointer-events: none;
}

.hud__bar {
  color: #6e5e45;
}

.hud__live {
  color: #2e6b50;
}

.hud__live i {
  background: #2e6b50;
  box-shadow: 0 0 8px rgba(46, 107, 80, 0.55);
}

.hud__media {
  border: 1px solid rgba(25, 21, 18, 0.14);
  box-shadow: inset 0 0 24px rgba(120, 90, 50, 0.08);
}

.hud__media figcaption {
  background: rgba(255, 251, 240, 0.86);
  border-color: rgba(25, 21, 18, 0.14);
  color: #4a4238;
}

.hud__flow span {
  color: #5e5548;
}

.hud__flow b {
  color: var(--red-deep);
}

.hud__flow i {
  color: #b7a98f;
}

/* ---------- 纸感区块与硬阴影 ---------- */
.section--paper {
  background-color: var(--paper-2);
}

.card,
.feature,
.pillar,
.module,
.iface-card,
.viewcard,
.arch {
  border-color: var(--line-2);
  box-shadow: 6px 6px 0 rgba(25, 21, 18, 0.05);
}

a.card:hover,
button.card:hover {
  transform: translate(-2px, -2px);
  border-color: var(--ink);
  box-shadow: 9px 9px 0 rgba(25, 21, 18, 0.08);
}

.card__foot .arrow,
.cap__arrow {
  color: var(--ink);
}

.specbar {
  border-color: var(--line-2);
}

.specbar__item {
  border-color: var(--line);
}

/* ---------- 演示控制台：米色机身 ---------- */
.console {
  background: linear-gradient(180deg, #f2e8d5 0%, #e7d9c1 100%);
  border: 1px solid #c5b395;
  border-radius: 20px;
  box-shadow: 10px 10px 0 rgba(25, 21, 18, 0.07),
    inset 0 1px 0 rgba(255, 255, 255, 0.7);
}

.console::before {
  background: radial-gradient(70% 45% at 50% 0%, rgba(255, 255, 255, 0.38), transparent 70%);
}

.console__bar {
  color: #6d5c43;
}

.console__status {
  color: #2e6b50;
}

.console__status i {
  background: #2e6b50;
  box-shadow: 0 0 8px rgba(46, 107, 80, 0.5);
}

.console__input {
  background: #fffbf0;
  border-color: #c6b598;
  color: #241f18;
}

.console__input::placeholder {
  color: #9b8f7c;
}

.console__input:focus {
  border-color: rgba(46, 107, 80, 0.7);
}

.console__send {
  background: #241f18;
  color: #f9f2e4;
  border-radius: 6px;
  box-shadow: 3px 3px 0 rgba(25, 21, 18, 0.14);
}

.console__send:hover {
  background: var(--red-deep);
}

.console__mic {
  background: #f7eedd;
  border-color: #c6b598;
  color: #4a4238;
}

.console__mic:hover {
  background: #efe3ce;
}

.console__mic.is-listening {
  background: var(--red-deep);
  border-color: var(--red-deep);
  color: #fff;
}

.console__quick button {
  background: #faf3e3;
  border-color: #cfc0a6;
  color: #5e5548;
  border-radius: 4px;
}

.console__quick button:hover {
  color: var(--ink);
  border-color: #8e7b5f;
}

.console__apply {
  background: var(--red-deep);
  border-radius: 6px;
  box-shadow: 3px 3px 0 rgba(25, 21, 18, 0.14);
}

.console__apply:hover {
  background: #a82c1f;
}

.console__reset {
  background: #faf3e3;
  border-color: #c6b598;
  color: #5e5548;
  border-radius: 6px;
}

.console__reset:hover {
  color: var(--ink);
  border-color: #8e7b5f;
}

.console__foot {
  border-color: #d5c7ae;
  color: #8b7d67;
}

/* 屏幕外框保持深色，与米色机身形成复古仪器对比 */
.screen {
  box-shadow: inset 0 0 25px rgba(0, 0, 0, 0.45), 0 0 0 6px #2a251e,
    0 0 0 7px #1a1712, 0 24px 60px -30px rgba(0, 0, 0, 0.8);
}

/* ---------- 其他细节 ---------- */
.quote__avatar,
.phone {
  box-shadow: 5px 5px 0 rgba(25, 21, 18, 0.1);
}

.phone-wrap {
  background: linear-gradient(180deg, #f2e8d5 0%, #e6d7bf 100%);
  border: 1px solid var(--line-2);
  box-shadow: 8px 8px 0 rgba(25, 21, 18, 0.06);
}

.newsitem:hover .newsitem__title,
.newsitem:hover .newsitem__arrow {
  color: var(--red-deep);
}

.link-arrow:hover {
  color: var(--red-deep);
  border-color: var(--red-deep);
}

.band {
  background: var(--dark);
}

.cta {
  background: var(--dark);
}

.footer {
  background: var(--dark);
}

/* ---------- 响应式 ---------- */
@media (max-width: 1100px) {
  .hero__stamp {
    display: none;
  }
}

@media (max-width: 700px) {
  .hero--retro {
    padding-top: calc(var(--header) + 44px);
  }
  .hud {
    border-radius: 16px;
    box-shadow: 7px 7px 0 rgba(25, 21, 18, 0.07);
  }
  .console {
    border-radius: 16px;
    box-shadow: 7px 7px 0 rgba(25, 21, 18, 0.07);
  }
}

@media (prefers-reduced-motion: reduce) {
  .btn:hover,
  a.card:hover,
  button.card:hover {
    transform: none;
  }
}

/* 品牌 slogan：logo 右侧 */
.brand__suffix {
  display: inline-block;
  padding-left: 12px;
  border-left: 1px solid var(--line-2);
  font-family: var(--sans);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: none;
  color: var(--ink-2);
  white-space: nowrap;
}

@media (max-width: 700px) {
  .brand__suffix {
    padding-left: 8px;
    font-size: 9.5px;
    letter-spacing: 0.02em;
  }
}