/* ==========================================================================
   RIZHEN INTELLIGENT · V4 "STATION SEQUENCE"
   rz-core.css — tokens / reset / typography / layout / nav / footer / controls
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. TOKENS
   -------------------------------------------------------------------------- */
:root {
  /* Colour · V3 §4.2 */
  --c-canvas:      #F7F8FA;
  --c-white:       #FFFFFF;
  --c-surface:     #ECEEF2;
  --c-obsidian:    #12161A;
  --c-obsidian-2:  #1F252B;
  --c-slate:       #59636E;
  --c-precision:   #004B96;
  --c-precision-2: #0F62FE;
  --c-ev:          #FF6600;
  --c-hairline:    #D8DCE3;
  --c-hairline-2:  #E7EAEF;
  --c-destructive: #B00020;
  --c-on-dark:     rgba(255, 255, 255, 0.72);
  --c-hairline-dark: rgba(255, 255, 255, 0.14);

  /* Type · V3 §3.1 */
  --ff-sans: "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB",
             "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --ff-mono: "Roboto Mono", "SF Mono", Consolas, "Noto Sans SC",
             "Microsoft YaHei", monospace;

  --fs-display: clamp(38px, 4.2vw, 54px);
  --fs-h2:      clamp(27px, 2.5vw, 36px);
  --fs-h3:      clamp(19px, 1.4vw, 23px);
  --fs-h4:      17px;
  --fs-body:    16px;
  --fs-body-sm: 15px;
  --fs-data:    14px;
  --fs-meta:    13px;
  --fs-over:    12px;
  --fs-micro:   12px;

  --lh-display: 1.14;
  --lh-body:    1.6;
  --lh-body-zh: 1.75;

  /* Space */
  --s-1: 4px;  --s-2: 8px;  --s-3: 12px; --s-4: 16px; --s-5: 24px;
  --s-6: 32px; --s-7: 48px; --s-8: 64px; --s-9: 96px; --s-10: 128px;

  --container: 1360px;
  --gutter: clamp(20px, 3.6vw, 40px);
  --section-py: clamp(72px, 9vw, 128px);
  --section-py-sm: clamp(52px, 6vw, 84px);

  /* Radius · V3 §5.2 */
  --r:    4px;
  --r-md: 6px;

  /* Elevation · V3 §5.3 */
  --sh-hover: 0 8px 24px rgba(0, 0, 0, 0.06);
  --sh-panel: 0 18px 48px rgba(18, 22, 26, 0.10);

  /* Motion · V3 §7.1 */
  --ease:  cubic-bezier(0.16, 1, 0.3, 1);
  --ease-io: cubic-bezier(0.4, 0, 0.2, 1);
  --dur-micro: 0.2s;
  --dur-reveal: 0.6s;

  /* Chrome heights */
  --topbar-h: 32px;
  --header-h: 66px;
  --station-h: 44px;
}

@media (max-width: 900px) {
  :root { --header-h: 58px; --topbar-h: 0px; --station-h: 40px; }
}

/* --------------------------------------------------------------------------
   2. RESET / BASE
   -------------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + var(--station-h) + 8px);
}

body {
  margin: 0;
  background: var(--c-canvas);
  color: var(--c-obsidian);
  font-family: var(--ff-sans);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

body.lang-zh { font-size: var(--fs-body-sm); line-height: var(--lh-body-zh); }
body.is-locked { overflow: hidden; }

h1, h2, h3, h4, h5, h6 { margin: 0; font-weight: 600; letter-spacing: -0.01em; }
h1 { font-size: var(--fs-display); line-height: var(--lh-display); font-weight: 700; letter-spacing: -0.02em; }
h2 { font-size: var(--fs-h2); line-height: 1.24; }
h3 { font-size: var(--fs-h3); line-height: 1.3; }
h4 { font-size: var(--fs-h4); line-height: 1.35; }
body.lang-zh h1 { line-height: 1.24; letter-spacing: -0.5px; }

p { margin: 0; }
ul, ol { margin: 0; padding: 0; }
li { list-style: none; }
img, svg, video { display: block; max-width: 100%; }
img { height: auto; }

a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
input, select, textarea { font: inherit; color: inherit; }

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

:focus-visible {
  outline: 2px solid var(--c-precision-2);
  outline-offset: 2px;
  border-radius: 2px;
}

.skip-link {
  position: fixed; top: -60px; left: var(--s-4); z-index: 999;
  background: var(--c-obsidian); color: #fff;
  padding: 10px 18px; font-size: var(--fs-meta); border-radius: var(--r);
  transition: transform var(--dur-micro) var(--ease-io);
}
.skip-link:focus { top: var(--s-4); }

.screen-reader-text {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip: rect(1px, 1px, 1px, 1px); white-space: nowrap;
}

/* --------------------------------------------------------------------------
   3. TYPE UTILITIES
   -------------------------------------------------------------------------- */
.mono {
  font-family: var(--ff-mono);
  font-variant-numeric: tabular-nums slashed-zero;
  font-feature-settings: "tnum" 1, "zero" 0;
}

.overline {
  display: inline-flex; align-items: center; gap: var(--s-2);
  font-family: var(--ff-mono);
  font-size: var(--fs-over);
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--c-slate);
  line-height: 1;
}
.overline--plain::before { display: none; }
.on-dark .overline, .overline--dark { color: rgba(255, 255, 255, 0.62); }

.lead {
  font-size: clamp(17px, 1.5vw, 20px);
  line-height: 1.6;
  color: var(--c-obsidian);
  max-width: 62ch;
}
body.lang-zh .lead { line-height: 1.7; max-width: 30em; }

.muted { color: var(--c-slate); }
.measure { max-width: 68ch; }
body.lang-zh .measure { max-width: 34em; }
.measure-sm { max-width: 52ch; }
body.lang-zh .measure-sm { max-width: 26em; }

.data {
  font-family: var(--ff-mono);
  font-size: var(--fs-data);
  font-weight: 500;
  font-variant-numeric: tabular-nums slashed-zero;
  letter-spacing: 0.01em;
}

.ev-tag {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--ff-mono); font-size: var(--fs-micro); font-weight: 700;
  letter-spacing: 1px; text-transform: uppercase;
  color: var(--c-ev);
  border: 1px solid currentColor; border-radius: 2px;
  padding: 3px 7px; line-height: 1;
}

/* --------------------------------------------------------------------------
   4. LAYOUT
   -------------------------------------------------------------------------- */
.container {
  width: 100%; max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.container--narrow { max-width: 940px; }

.section { padding-block: var(--section-py); position: relative; }
.section--tight { padding-block: var(--section-py-sm); }
.section--surface { background: var(--c-surface); }
.section--white { background: var(--c-white); }
.section--dark {
  background: var(--c-obsidian);
  color: #fff;
}
.section--dark p, .section--dark .muted { color: var(--c-on-dark); }

/* blueprint hairline with corner ticks — repeated structural motif */
.rule {
  position: relative; height: 1px; background: var(--c-hairline);
  margin-block: 0;
}
.rule::before, .rule::after {
  content: ""; position: absolute; top: -3px; width: 1px; height: 7px;
  background: var(--c-hairline);
}
.rule::before { left: 0; }
.rule::after { right: 0; }
.section--dark .rule, .section--dark .rule::before, .section--dark .rule::after { background: var(--c-hairline-dark); }

.section-head { display: flex; flex-direction: column; gap: var(--s-4); margin-bottom: var(--s-7); }
.section-head h2 { max-width: 22em; }
.section-head p { color: var(--c-slate); max-width: 62ch; }
body.lang-zh .section-head p { max-width: 32em; }

.section-head--split {
  flex-direction: row; align-items: flex-end; justify-content: space-between; gap: var(--s-6);
}
.section-head--split > div:first-child { display: flex; flex-direction: column; gap: var(--s-4); }

.section-index {
  display: flex; align-items: baseline; gap: var(--s-3);
  font-family: var(--ff-mono); font-size: var(--fs-over); font-weight: 700;
  letter-spacing: 1.5px; text-transform: uppercase; color: var(--c-slate);
  margin-bottom: var(--s-4);
}
.section--dark .section-index { color: rgba(255, 255, 255, 0.55); }

.grid { display: grid; gap: var(--s-5); }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

@media (max-width: 1080px) {
  .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 700px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: minmax(0, 1fr); }
  .section-head--split { flex-direction: column; align-items: flex-start; }
}

/* --------------------------------------------------------------------------
   5. MOTION PRIMITIVES · V3 §7
   -------------------------------------------------------------------------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity var(--dur-reveal) var(--ease), transform var(--dur-reveal) var(--ease);
  transition-delay: calc(var(--rv-i, 0) * 70ms);
  will-change: opacity, transform;
}
[data-reveal="fade"] { transform: none; }
[data-reveal="right"] { transform: translateX(24px); }
[data-reveal].is-in { opacity: 1; transform: none; }

/* image wipe: overlay panel retracts (transform only) */
.wipe { position: relative; overflow: hidden; }
.wipe::after {
  content: ""; position: absolute; inset: 0;
  background: var(--c-surface);
  transform-origin: right center;
  transform: scaleX(1);
  transition: transform 0.7s var(--ease);
}
.wipe.is-in::after { transform: scaleX(0); }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  [data-reveal] { opacity: 1 !important; transform: none !important; }
  .wipe::after { display: none; }
}

/* --------------------------------------------------------------------------
   6. BUTTONS · V3 §5.4
   -------------------------------------------------------------------------- */
.btn {
  position: relative;
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  min-height: 44px; padding: 0 22px;
  font-size: var(--fs-data); font-weight: 600; letter-spacing: 0.01em;
  white-space: nowrap;
  border-radius: var(--r);
  border: 1px solid transparent;
  transition: background-color var(--dur-micro) var(--ease-io),
              color var(--dur-micro) var(--ease-io),
              border-color var(--dur-micro) var(--ease-io),
              transform var(--dur-micro) var(--ease-io),
              box-shadow var(--dur-micro) var(--ease-io);
}
.btn svg { flex: none; transition: transform var(--dur-micro) var(--ease-io); }
.btn:hover svg { transform: translateX(3px); }
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); box-shadow: none; }

.btn--primary { background: var(--c-obsidian); color: #fff; }
.btn--primary:hover { background: var(--c-precision); box-shadow: var(--sh-hover); }

.btn--blue { background: var(--c-precision); color: #fff; }
.btn--blue:hover { background: var(--c-precision-2); box-shadow: var(--sh-hover); }

.btn--ev { background: var(--c-ev); color: #fff; }
.btn--ev:hover { background: #E65C00; box-shadow: var(--sh-hover); }

.btn--secondary {
  background: var(--c-white); color: var(--c-obsidian);
  border-color: var(--c-obsidian);
}
.btn--secondary:hover { background: var(--c-canvas); box-shadow: var(--sh-hover); }

.btn--invert { background: #fff; color: var(--c-obsidian); }
.btn--invert:hover { background: var(--c-canvas); box-shadow: none; }

.btn--outline-invert {
  color: #fff; border-color: rgba(255, 255, 255, 0.4); background: transparent;
}
.btn--outline-invert:hover { border-color: #fff; background: rgba(255, 255, 255, 0.06); }

.btn--sm { min-height: 38px; padding: 0 16px; font-size: var(--fs-meta); }
.btn--lg { min-height: 52px; padding: 0 28px; }
.btn--block { width: 100%; }

/* tertiary text link with drawn underline */
.tlink {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: var(--fs-data); font-weight: 600; color: var(--c-obsidian);
  padding-bottom: 3px;
  background-image: linear-gradient(currentColor, currentColor);
  background-size: 100% 1px; background-position: 0 100%; background-repeat: no-repeat;
  transition: color var(--dur-micro) var(--ease-io), background-size 0.3s var(--ease);
}
.tlink svg { transition: transform var(--dur-micro) var(--ease-io); }
.tlink:hover { color: var(--c-precision); }
.tlink:hover svg { transform: translateX(4px); }
.tlink--reveal { background-size: 0% 1px; background-position: 0 100%; }
.tlink--reveal:hover { background-size: 100% 1px; }
.section--dark .tlink { color: #fff; }
.section--dark .tlink:hover { color: rgba(255, 255, 255, 0.75); }

/* --------------------------------------------------------------------------
   7. TOP BAR + HEADER + NAV
   -------------------------------------------------------------------------- */
.topbar {
  background: var(--c-obsidian); color: rgba(255, 255, 255, 0.7);
  height: var(--topbar-h);
  font-family: var(--ff-mono); font-size: var(--fs-micro); letter-spacing: 0.04em;
}
.topbar__inner { display: flex; align-items: center; justify-content: space-between; height: 100%; }
.topbar__meta { display: flex; align-items: center; gap: var(--s-5); min-width: 0; }
.topbar__meta a, .topbar__meta span { display: inline-flex; align-items: center; gap: 6px; white-space: nowrap; }
.topbar__meta a:hover { color: #fff; }
.topbar__lang { display: flex; align-items: center; gap: 8px; }
.topbar__lang a { padding: 2px 4px; }
.topbar__lang a.is-active { color: #fff; font-weight: 700; }
.topbar__lang .sep { opacity: 0.4; }
@media (max-width: 900px) { .topbar { display: none; } }

.site-header {
  position: sticky; top: 0; z-index: 90;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--c-hairline);
  transition: box-shadow var(--dur-micro) var(--ease-io);
}
@supports not (backdrop-filter: blur(4px)) { .site-header { background: #fff; } }
body.is-scrolled .site-header { box-shadow: 0 1px 0 var(--c-hairline), 0 8px 24px rgba(0, 0, 0, 0.04); }

.site-header__progress {
  position: absolute; left: 0; right: 0; bottom: -1px; height: 2px;
  background: var(--c-precision);
  transform: scaleX(0); transform-origin: left center;
}

.nav { display: flex; align-items: center; gap: var(--s-6); height: var(--header-h); }

.brand { display: inline-flex; align-items: center; gap: 10px; flex: none; }
.brand__mark { display: block; width: 34px; height: 34px; }
.brand__mark img { width: 100%; height: 100%; object-fit: contain; }
.brand__text { display: flex; flex-direction: column; gap: 2px; }
.brand__name { font-size: 17px; font-weight: 700; letter-spacing: 0.06em; line-height: 1; }
.brand__sub {
  font-family: var(--ff-mono); font-size: 9px; font-weight: 500;
  letter-spacing: 1.6px; color: var(--c-slate); line-height: 1;
}
.on-dark .brand__sub { color: rgba(255, 255, 255, 0.55); }

.nav__menu { display: flex; align-items: center; gap: 2px; margin-inline: auto; }
.nav__item { position: relative; }
/* mega 面板以 .site-header 为包含块（sticky 即 positioned）：top:100% 永远贴住站头底边。
   旧实现 fixed + 双 top 值依赖 is-scrolled 与吸附状态同步，阈值错位即出现漏光缝隙 */
.nav__item--mega { position: static; }
.nav__link {
  display: inline-flex; align-items: center; gap: 5px;
  height: var(--header-h); padding-inline: 12px;
  font-size: 16px; font-weight: 500; color: var(--c-obsidian);
  white-space: nowrap;
  position: relative;
}
.nav__link::after {
  content: ""; position: absolute; left: 12px; right: 12px; bottom: 0; height: 2px;
  background: var(--c-obsidian);
  transform: scaleX(0); transform-origin: left center;
  transition: transform 0.3s var(--ease);
}
.nav__item:hover > .nav__link::after,
.nav__link:focus-visible::after { transform: scaleX(1); }
/* 当前页高亮：与吸附导航（stationbar）一致的蓝色块 + 白字，取代旧下划线 */
.nav__item.is-current > .nav__link {
  background: var(--c-precision); color: #fff; font-weight: 600;
}
/* 蓝条向下延伸盖住站头 1px 底边框，消除块底浅色分隔线（同 site-header__progress 手法） */
.nav__item.is-current > .nav__link::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -1px; height: 2px;
  background: var(--c-precision); transform: none;
}
.nav__link .caret { transition: transform var(--dur-micro) var(--ease-io); opacity: 0.55; }
.nav__item:hover > .nav__link .caret { transform: rotate(180deg); }

/* dropdown / mega */
.nav__panel {
  position: absolute; top: calc(100% + 1px); left: 0;
  min-width: 230px;
  background: var(--c-white);
  border: 1px solid var(--c-hairline);
  border-radius: var(--r-md);
  box-shadow: var(--sh-panel);
  padding: var(--s-3);
  opacity: 0; visibility: hidden;
  transform: translateY(-6px);
  transition: opacity var(--dur-micro) var(--ease-io), transform var(--dur-micro) var(--ease-io), visibility var(--dur-micro);
}
.nav__item:hover > .nav__panel,
.nav__item:focus-within > .nav__panel { opacity: 1; visibility: visible; transform: none; }
.nav__panel a {
  display: block; padding: 9px 12px; font-size: var(--fs-meta); border-radius: var(--r);
  transition: background-color var(--dur-micro) var(--ease-io), color var(--dur-micro) var(--ease-io);
}
.nav__panel a:hover { background: var(--c-canvas); color: var(--c-precision); }

.mega {
  position: absolute; left: 0; right: 0;
  top: 100%;
  background: var(--c-white);
  border-top: 1px solid var(--c-hairline);
  border-bottom: 1px solid var(--c-hairline);
  box-shadow: var(--sh-panel);
  opacity: 0; visibility: hidden; transform: translateY(-8px);
  transition: opacity var(--dur-micro) var(--ease-io), transform var(--dur-micro) var(--ease-io), visibility var(--dur-micro);
  z-index: 89;
}
.nav__item--mega:hover > .mega,
.nav__item--mega:focus-within > .mega { opacity: 1; visibility: visible; transform: none; }
.mega__inner {
  display: grid; grid-template-columns: 258px 1fr; gap: var(--s-8);
  padding-block: var(--s-6);
}
.mega__intro { display: flex; flex-direction: column; gap: var(--s-3); border-right: 1px solid var(--c-hairline); padding-right: var(--s-6); }
/* 产品中心小标签与下方标题同字号并加粗 */
.mega__intro .overline { font-size: var(--fs-h4); font-weight: 700; color: var(--c-obsidian); letter-spacing: 1px; }
.mega__intro h4 { font-size: var(--fs-h4); }
.mega__intro p { font-size: var(--fs-meta); color: var(--c-slate); }
.mega__groups { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: var(--s-5) var(--s-6); }
.mega__group-title {
  display: flex; align-items: center; gap: 6px;
  font-family: var(--ff-sans); font-size: var(--fs-micro); font-weight: 700;
  letter-spacing: 1.2px; text-transform: uppercase; color: var(--c-slate);
  padding-bottom: var(--s-2); margin-bottom: var(--s-2);
  border-bottom: 1px solid var(--c-hairline);
}
.mega__link {
  display: flex; align-items: baseline; justify-content: space-between; gap: var(--s-3);
  padding: 7px 0; font-size: var(--fs-meta);
  transition: color var(--dur-micro) var(--ease-io), transform var(--dur-micro) var(--ease-io);
}
.mega__link .meta { font-family: var(--ff-mono); font-size: 12px; color: var(--c-slate); letter-spacing: 0.06em; }
.mega__link:hover { color: var(--c-precision); transform: translateX(3px); }
.mega__foot {
  grid-column: 1 / -1; display: flex; align-items: center; justify-content: space-between;
  gap: var(--s-5); border-top: 1px solid var(--c-hairline); padding-top: var(--s-4);
  font-size: var(--fs-meta); color: var(--c-slate);
}
@media (max-width: 1280px) { .mega { display: none; } }

.nav__cta { display: flex; align-items: center; gap: var(--s-3); flex: none; }
.nav__cta .btn { font-size: 15px; }

.nav__toggle {
  display: none; width: 42px; height: 42px;
  border: 1px solid var(--c-hairline); border-radius: var(--r);
  position: relative; background: var(--c-white);
}
.nav__toggle span, .nav__toggle::before, .nav__toggle::after {
  content: ""; position: absolute; left: 11px; right: 11px; height: 1.5px;
  background: var(--c-obsidian);
  transition: transform var(--dur-micro) var(--ease-io);
}
.nav__toggle::before { top: 14px; }
.nav__toggle span { top: 20px; }
.nav__toggle::after { top: 26px; }

@media (max-width: 1280px) {
  .nav__menu { display: none; }
  .nav__toggle { display: block; }
  /* 菜单隐藏后无 auto margin 可吸收空间，CTA/汉堡需自行推到右端 */
  .nav__cta { margin-left: auto; }
}
@media (max-width: 560px) {
  .nav__cta .btn { display: none; }
  .brand__sub { display: none; }
  /* CTA 容器推到右端，使汉堡按钮与 logo 左右对齐，便于单手点击展开 */
  .nav__cta { margin-left: auto; }
}

/* --------------------------------------------------------------------------
   8. STATION BAR (signature browse logic)
   -------------------------------------------------------------------------- */
.stationbar {
  position: sticky; top: var(--header-h); z-index: 80;
  height: var(--station-h);
  background: var(--c-obsidian); color: #fff;
  overflow: hidden;
}
.stationbar__inner {
  display: flex; align-items: center; gap: var(--s-5);
  height: 100%;
}
.stationbar__readout {
  display: flex; align-items: baseline; gap: 8px; flex: none;
  font-family: var(--ff-mono); font-size: var(--fs-micro);
  letter-spacing: 1.2px; text-transform: uppercase; color: rgba(255, 255, 255, 0.55);
}
.stationbar__readout b { color: #fff; font-size: var(--fs-meta); letter-spacing: 1px; }
.stationbar__track {
  display: flex; align-items: stretch; gap: 0; flex: 1; min-width: 0;
  overflow-x: auto; scrollbar-width: none;
}
.stationbar__track::-webkit-scrollbar { display: none; }
.stationbar__step {
  position: relative; flex: 1 1 0; min-width: 92px;
  display: flex; align-items: center; justify-content: center; gap: 8px;
  padding: 0 12px; height: var(--station-h);
  font-size: var(--fs-micro); letter-spacing: 0.04em;
  color: rgba(255, 255, 255, 0.5);
  white-space: nowrap;
  transition: color var(--dur-micro) var(--ease-io), background-color var(--dur-micro) var(--ease-io);
}
.stationbar__step:first-child::before { display: none; }
.stationbar__step:hover { color: #fff; background: rgba(255, 255, 255, 0.08); }
/* 激活态：整块换色（品牌蓝底白字），替代此前的底部指示线 */
.stationbar__step.is-done { color: rgba(255, 255, 255, 0.72); }
.stationbar__step.is-active { background: var(--c-precision); color: #fff; font-weight: 600; }
@media (max-width: 900px) {
  .stationbar__readout { display: none; }
  .stationbar__step { min-width: 78px; font-size: 11px; }
}

/* --------------------------------------------------------------------------
   9. MOBILE DRAWER
   -------------------------------------------------------------------------- */
.drawer-overlay {
  position: fixed; inset: 0; z-index: 100;
  background: rgba(18, 22, 26, 0.55);
  opacity: 0; visibility: hidden;
  transition: opacity 0.3s var(--ease-io), visibility 0.3s;
}
body.is-drawer .drawer-overlay { opacity: 1; visibility: visible; }

.drawer {
  position: fixed; top: 0; right: 0; bottom: 0; z-index: 101;
  width: min(400px, 88vw);
  background: var(--c-white);
  display: flex; flex-direction: column;
  transform: translateX(100%);
  transition: transform 0.4s var(--ease);
  overflow-y: auto;
}
body.is-drawer .drawer { transform: none; }
.drawer__head {
  display: flex; align-items: center; justify-content: space-between;
  padding: var(--s-4) var(--s-5); border-bottom: 1px solid var(--c-hairline);
  position: sticky; top: 0; background: var(--c-white); z-index: 2;
}
.drawer__close {
  width: 40px; height: 40px; border: 1px solid var(--c-hairline); border-radius: var(--r);
  position: relative;
}
.drawer__close::before, .drawer__close::after {
  content: ""; position: absolute; left: 11px; right: 11px; top: 19px; height: 1.5px;
  background: var(--c-obsidian);
}
.drawer__close::before { transform: rotate(45deg); }
.drawer__close::after { transform: rotate(-45deg); }
.drawer__menu { padding: var(--s-4) var(--s-5); flex: 1; }
.drawer__menu > li { border-bottom: 1px solid var(--c-hairline-2); }
.drawer__menu > li > a {
  display: flex; align-items: center; justify-content: space-between;
  padding: 15px 0; font-size: 16px; font-weight: 600;
}
.drawer__sub { padding: 0 0 var(--s-4) var(--s-4); display: grid; gap: 2px; }
.drawer__sub a { display: block; padding: 8px 0; font-size: var(--fs-meta); color: var(--c-slate); }
.drawer__sub a:hover { color: var(--c-precision); }
.drawer__foot { padding: var(--s-5); border-top: 1px solid var(--c-hairline); display: grid; gap: var(--s-4); }
.drawer__lang { display: flex; gap: var(--s-2); }
.drawer__lang a {
  flex: 1; text-align: center; padding: 10px; border: 1px solid var(--c-hairline);
  border-radius: var(--r); font-size: var(--fs-meta);
}
.drawer__lang a.is-active { border-color: var(--c-obsidian); font-weight: 600; }

/* --------------------------------------------------------------------------
   10. FOOTER
   -------------------------------------------------------------------------- */
.site-footer {
  background: var(--c-obsidian); color: rgba(255, 255, 255, 0.68);
  padding-top: var(--s-9);
  font-size: var(--fs-meta);
}
.footer__statement {
  display: grid; grid-template-columns: 1.4fr 1fr; gap: var(--s-6);
  align-items: end; padding-bottom: var(--s-7);
  border-bottom: 1px solid var(--c-hairline-dark);
}
.footer__statement h2 {
  color: #fff; font-size: clamp(30px, 4vw, 52px); line-height: 1.12; letter-spacing: -0.02em;
  font-weight: 700;
}
.footer__statement .meta {
  font-family: var(--ff-mono); font-size: var(--fs-micro); letter-spacing: 1.2px;
  line-height: 1.9; color: rgba(255, 255, 255, 0.5); text-transform: uppercase;
}
.footer__grid {
  display: grid; grid-template-columns: 1.5fr repeat(3, minmax(0, 1fr));
  gap: var(--s-7) var(--s-6);
  padding-block: var(--s-7);
}
.footer__brand { display: flex; flex-direction: column; gap: var(--s-4); max-width: 34ch; }
.footer__brand .brand__name, .footer__brand .brand { color: #fff; }
.footer__brand .brand__mark img { filter: brightness(0) invert(1); }
.footer__col h4 {
  font-family: var(--ff-mono); font-size: var(--fs-micro); font-weight: 700;
  letter-spacing: 1.4px; text-transform: uppercase; color: rgba(255, 255, 255, 0.45);
  margin-bottom: var(--s-4);
}
.footer__col li { margin-bottom: 10px; }
.footer__col a { transition: color var(--dur-micro) var(--ease-io), transform var(--dur-micro) var(--ease-io); display: inline-block; }
.footer__col a:hover { color: #fff; transform: translateX(3px); }
.footer__col strong { color: #fff; font-weight: 600; }
.footer__bottom {
  display: flex; align-items: center; justify-content: space-between; gap: var(--s-5);
  flex-wrap: wrap;
  padding-block: var(--s-5);
  border-top: 1px solid var(--c-hairline-dark);
  font-size: var(--fs-micro); letter-spacing: 0.06em;
  color: rgba(255, 255, 255, 0.45);
}
.footer__bottom a:hover { color: #fff; }
.footer__legal { display: flex; align-items: center; gap: var(--s-3); }
@media (max-width: 980px) {
  .footer__statement { grid-template-columns: 1fr; align-items: start; }
  .footer__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 560px) { .footer__grid { grid-template-columns: 1fr; } }

/* --------------------------------------------------------------------------
   11. FORMS · V3 §5.5
   -------------------------------------------------------------------------- */
.form { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--s-4); }
.form__field { display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.form__full { grid-column: 1 / -1; }
.form label, .form__field > span.label {
  font-family: var(--ff-mono); font-size: var(--fs-micro); font-weight: 700;
  letter-spacing: 1px; text-transform: uppercase; color: var(--c-slate);
}
.form input, .form select, .form textarea {
  width: 100%; padding: 11px 13px;
  background: var(--c-white);
  border: 1px solid var(--c-hairline); border-radius: var(--r);
  font-size: var(--fs-data);
  transition: border-color var(--dur-micro) var(--ease-io), box-shadow var(--dur-micro) var(--ease-io);
}
.form textarea { resize: vertical; min-height: 84px; }
.form input:focus, .form select:focus, .form textarea:focus {
  outline: none; border-color: var(--c-precision);
  box-shadow: 0 0 0 3px rgba(0, 75, 150, 0.12);
}
.form .helper { font-size: var(--fs-micro); color: var(--c-slate); }
.form input[aria-invalid="true"], .form .has-error input { border-color: var(--c-destructive); }
.form .error { font-size: var(--fs-micro); color: var(--c-destructive); }
.form__privacy { font-size: var(--fs-micro); color: var(--c-slate); line-height: 1.6; }
.form__success {
  font-size: var(--fs-meta); color: var(--c-precision); font-weight: 600;
  border: 1px solid var(--c-precision); border-radius: var(--r);
  padding: 12px 14px; background: rgba(0, 75, 150, 0.05);
}
@media (max-width: 620px) { .form { grid-template-columns: 1fr; } }

@keyframes rz-shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-4px); }
  75% { transform: translateX(4px); }
}
.shake { animation: rz-shake 0.3s var(--ease-io); }

/* --------------------------------------------------------------------------
   12. MODAL
   -------------------------------------------------------------------------- */
.modal-overlay {
  position: fixed; inset: 0; z-index: 200;
  display: flex; align-items: center; justify-content: center;
  padding: var(--s-5);
  background: rgba(18, 22, 26, 0.62);
  opacity: 0; visibility: hidden;
  transition: opacity 0.3s var(--ease-io), visibility 0.3s;
}
.modal-overlay.is-open { opacity: 1; visibility: visible; }
.modal {
  width: min(720px, 100%); max-height: min(88vh, 900px); overflow-y: auto;
  background: var(--c-white); border-radius: var(--r-md);
  transform: translateY(16px) ;
  transition: transform 0.4s var(--ease);
}
.modal-overlay.is-open .modal { transform: none; }
.modal__header {
  display: flex; align-items: flex-start; justify-content: space-between; gap: var(--s-5);
  padding: var(--s-6) var(--s-6) var(--s-4);
  border-bottom: 1px solid var(--c-hairline);
  position: sticky; top: 0; background: var(--c-white); z-index: 2;
}
.modal__title { font-size: var(--fs-h3); }
.modal__sub { font-size: var(--fs-meta); color: var(--c-slate); margin-top: 6px; }
.modal__close {
  flex: none; width: 40px; height: 40px; border: 1px solid var(--c-hairline);
  border-radius: var(--r); position: relative;
  transition: background-color var(--dur-micro) var(--ease-io);
}
.modal__close:hover { background: var(--c-canvas); }
.modal__close::before, .modal__close::after {
  content: ""; position: absolute; left: 12px; right: 12px; top: 19px; height: 1.5px; background: var(--c-obsidian);
}
.modal__close::before { transform: rotate(45deg); }
.modal__close::after { transform: rotate(-45deg); }
.modal__body { padding: var(--s-5) var(--s-6); }
.modal__footer {
  padding: var(--s-4) var(--s-6) var(--s-6);
  position: sticky; bottom: 0; background: var(--c-white);
  border-top: 1px solid var(--c-hairline);
}

/* --------------------------------------------------------------------------
   13. BREADCRUMB / PAGINATION / PROSE
   -------------------------------------------------------------------------- */
.breadcrumb {
  font-family: var(--ff-mono); font-size: var(--fs-micro); letter-spacing: 0.06em;
  color: var(--c-slate);
}
.breadcrumb ol { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.breadcrumb li { display: inline-flex; align-items: center; gap: 8px; }
.breadcrumb a:hover { color: var(--c-precision); }
.breadcrumb .sep { opacity: 0.5; }
.on-dark .breadcrumb, .breadcrumb--dark { color: rgba(255, 255, 255, 0.55); }
.breadcrumb--dark a:hover { color: #fff; }

.pagination { display: flex; gap: 6px; justify-content: center; margin-top: var(--s-7); }
.pagination .page-numbers {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 42px; height: 42px; padding: 0 12px;
  border: 1px solid var(--c-hairline); border-radius: var(--r);
  background: var(--c-white); font-size: var(--fs-meta); font-family: var(--ff-mono);
  transition: border-color var(--dur-micro) var(--ease-io), color var(--dur-micro) var(--ease-io);
}
.pagination .page-numbers:hover { border-color: var(--c-obsidian); }
.pagination .page-numbers.current { background: var(--c-obsidian); color: #fff; border-color: var(--c-obsidian); }

.prose { max-width: 72ch; }
body.lang-zh .prose { max-width: 36em; }
.prose > * + * { margin-top: 1.1em; }
.prose h2 { font-size: var(--fs-h3); margin-top: 2em; }
.prose h3 { font-size: var(--fs-h4); margin-top: 1.8em; }
.prose p, .prose li { color: #2A3238; }
.prose ul > li, .prose ol > li {
  position: relative; padding-left: 20px; list-style: none; margin-top: 0.5em;
}
.prose ul > li::before {
  content: ""; position: absolute; left: 0; top: 0.65em; width: 8px; height: 1px; background: var(--c-precision);
}
.prose ol { counter-reset: rz; }
.prose ol > li { counter-increment: rz; }
.prose ol > li::before {
  content: counter(rz, decimal-leading-zero);
  position: absolute; left: 0; top: 0.1em;
  font-family: var(--ff-mono); font-size: var(--fs-micro); color: var(--c-precision);
}
.prose strong { font-weight: 600; }
.prose a { color: var(--c-precision); background-image: linear-gradient(currentColor, currentColor); background-size: 100% 1px; background-position: 0 100%; background-repeat: no-repeat; }
.prose blockquote {
  border-left: 2px solid var(--c-precision); padding-left: var(--s-5);
  color: var(--c-slate); font-size: 1.05em;
}
.prose img { border-radius: var(--r); margin-block: 1.5em; }
.prose table { width: 100%; border-collapse: collapse; font-size: var(--fs-data); }
.prose th, .prose td { border-bottom: 1px solid var(--c-hairline); padding: 10px 12px; text-align: left; }
.prose th { font-family: var(--ff-mono); font-size: var(--fs-micro); text-transform: uppercase; letter-spacing: 1px; color: var(--c-slate); }

/* 正文核心块（WP Button / File 等块）按钮：核心默认样式未主题化（深灰药丸），统一对齐设计系统 */
.prose .wp-block-button .wp-block-button__link,
.prose .wp-element-button,
.wp-block-file .wp-block-file__button {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  flex: none; min-height: 38px; padding: 0 16px;
  background: var(--c-precision); color: #fff;
  border: 1px solid transparent; border-radius: var(--r);
  font-size: var(--fs-meta); font-weight: 600; line-height: 1.2;
  text-decoration: none;
  transition: background-color var(--dur-micro) var(--ease-io);
}
.prose .wp-block-button .wp-block-button__link:hover,
.prose .wp-element-button:hover,
.wp-block-file .wp-block-file__button:hover { background: var(--c-precision-2); color: #fff; }

/* 正文文件块（WP File block）：文件名 + 下载按钮横排，样式同 dl-item 行 */
.wp-block-file {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: var(--s-3);
  padding: var(--s-4) 0; border-bottom: 1px solid var(--c-hairline-2);
}
.wp-block-file a:not(.wp-block-file__button) {
  min-width: 0; overflow-wrap: anywhere;
  color: var(--c-obsidian); font-weight: 600; background-image: none;
}
.wp-block-file a:not(.wp-block-file__button):hover { color: var(--c-precision); }

/* --------------------------------------------------------------------------
   14. QA 静态模式（?rzstatic=1）：设计评审 / 截图用，跳过入场动效
   -------------------------------------------------------------------------- */
body.rz-static [data-reveal] { opacity: 1 !important; transform: none !important; }
body.rz-static .wipe::after { display: none; }
body.rz-static .stationbar, body.rz-static .anchorbar { position: static; }

/* --------------------------------------------------------------------------
 * 微信咨询悬浮按钮 + 液态弹窗（全局元素）
 * blob 用 border-radius 变形（小面积、仅合成层）；弹出用 transform + radius 液滴形变
 * ------------------------------------------------------------------------ */
.wx-fab { position: fixed; right: clamp(14px, 2vw, 26px); bottom: clamp(16px, 3.5vh, 30px); z-index: 80; }
.wx-fab__btn {
  position: relative; display: inline-flex; align-items: center; gap: 9px;
  padding: 13px 20px; border: 0; cursor: pointer;
  background: transparent; color: #fff;
  font-size: var(--fs-meta); font-weight: 600; letter-spacing: 0.02em;
  transition: transform var(--dur-micro) var(--ease-io);
}
.wx-fab__btn:hover { transform: translateY(-3px); }
.wx-fab__btn:focus-visible { outline: 2px solid var(--c-precision-2); outline-offset: 3px; }
.wx-fab__blob {
  position: absolute; inset: -2px; z-index: -1; border-radius: 999px;
  background: var(--c-precision);
  box-shadow: 0 12px 28px rgba(0, 75, 150, 0.32);
  animation: rz-blob 8s var(--ease-io) infinite;
}
.wx-fab__btn:hover .wx-fab__blob { background: var(--c-precision-2); }
@keyframes rz-blob {
  0%, 100% { border-radius: 999px; transform: scale(1); }
  30% { border-radius: 46% 54% 52% 48% / 52% 44% 56% 48%; transform: scale(1.04, 0.96); }
  60% { border-radius: 56% 44% 42% 58% / 44% 56% 44% 56%; transform: scale(0.97, 1.03); }
}
.wx-fab__icon { flex: none; }

/* 弹窗：从按钮处“液滴”上弹 */
.wx-pop {
  position: absolute; right: 0; bottom: calc(100% + 16px);
  width: min(272px, calc(100vw - 40px));
  padding: 22px 20px 18px; text-align: center;
  background: var(--c-white);
  border: 1px solid var(--c-hairline); border-radius: var(--r-md);
  box-shadow: 0 28px 56px rgba(18, 22, 26, 0.2);
  opacity: 0; visibility: hidden; pointer-events: none;
  transform: translateY(16px) scale(0.4);
  transform-origin: 88% 100%;
  transition: opacity var(--dur-micro) var(--ease-io), transform var(--dur-micro) var(--ease-io), visibility 0s linear var(--dur-micro);
}
.wx-fab.is-open .wx-pop {
  opacity: 1; visibility: visible; pointer-events: auto;
  transform: none;
  animation: rz-pop-liquid 0.55s var(--ease-io);
  transition: opacity var(--dur-micro) var(--ease-io), transform var(--dur-micro) var(--ease-io);
}
@keyframes rz-pop-liquid {
  0% { opacity: 0; transform: translateY(22px) scale(0.3); border-radius: 52% 48% 44% 56% / 40% 52% 48% 60%; }
  55% { opacity: 1; transform: translateY(-4px) scale(1.04, 0.96); border-radius: 26px 26px 30px 26px / 30px 22px 26px 26px; }
  80% { transform: translateY(2px) scale(0.99, 1.01); border-radius: var(--r-md); }
  100% { opacity: 1; transform: none; border-radius: var(--r-md); }
}
.wx-pop__close {
  position: absolute; top: 8px; right: 8px; width: 30px; height: 30px;
  display: inline-flex; align-items: center; justify-content: center;
  border: 0; border-radius: 50%; background: transparent; color: var(--c-slate); cursor: pointer;
  transition: background-color var(--dur-micro) var(--ease-io), color var(--dur-micro) var(--ease-io);
}
.wx-pop__close:hover { background: var(--c-surface); color: var(--c-obsidian); }
.wx-pop__title { margin: 0 0 12px; font-size: var(--fs-h5); font-weight: 600; color: var(--c-obsidian); }
.wx-pop__qr {
  display: block; width: 200px; max-width: 100%; height: auto; margin: 0 auto;
  border: 1px solid var(--c-hairline-2); border-radius: var(--r); background: var(--c-white);
}
.wx-pop__caption { margin: 12px 0 0; font-size: var(--fs-meta); color: var(--c-slate); }
@media (max-width: 760px) {
  .wx-fab__btn { padding: 11px 15px; }
  .wx-fab__label { font-size: var(--fs-micro); }
}
@media (prefers-reduced-motion: reduce) {
  .wx-fab__blob { animation: none; }
  .wx-fab.is-open .wx-pop { animation: none; }
}

/* --------------------------------------------------------------------------
 * 15. 媒体视频块 + 灯箱（ACF file 字段选择视频时由 rizhen_video_block 输出）
 * 缩略块点击 → 全屏遮罩内大窗播放；ESC / 点击遮罩 / 关闭按钮退出
 * ------------------------------------------------------------------------ */
.rz-video {
  position: relative; display: block; width: 100%; height: 100%;
  overflow: hidden; cursor: pointer;
  background: var(--c-obsidian);
}
.rz-video video { display: block; width: 100%; height: 100%; object-fit: cover; }
/* B 站嵌入变体：占位封面卡（播放器 iframe 留到灯箱再加载），相册内对齐图片 4:3 */
.rz-video--embed { height: auto; }
.rz-video__cover {
  position: relative; display: block; width: 100%; aspect-ratio: 16 / 9;
  background: linear-gradient(135deg, var(--c-obsidian) 0%, var(--c-obsidian-2) 100%);
}
.gallery .rz-video__cover,
.gallery-rail__item .rz-video__cover { aspect-ratio: 4 / 3; }
.rz-video__img {
  position: absolute; inset: 0; width: 100%; height: 100%;
  object-fit: cover;
}
.rz-video__ext {
  position: absolute; left: 12px; top: 10px;
  padding: 3px 9px; border-radius: 2px;
  background: rgba(18, 22, 26, 0.62);
  color: #fff; font-size: var(--fs-micro); letter-spacing: 0.04em;
}
.rz-video__btn {
  position: absolute; left: 50%; top: 50%;
  width: 58px; height: 58px; margin: -29px 0 0 -29px;
  border-radius: 50%;
  background: rgba(18, 22, 26, 0.72);
  border: 1px solid rgba(255, 255, 255, 0.55);
  transition: transform var(--dur-micro) var(--ease-io), background-color var(--dur-micro) var(--ease-io);
}
.rz-video__btn::after {
  content: ""; position: absolute; left: 22px; top: 17px;
  border-style: solid; border-width: 12px 0 12px 19px;
  border-color: transparent transparent transparent #fff;
}
.rz-video:hover .rz-video__btn { transform: scale(1.1); background: var(--c-precision); border-color: #fff; }
.rz-video:focus-visible { outline: 2px solid var(--c-precision-2); outline-offset: 2px; }

.lightbox {
  position: fixed; inset: 0; z-index: 300;
  display: flex; align-items: center; justify-content: center;
  padding: var(--s-6);
  background: rgba(18, 22, 26, 0.92);
  opacity: 0; visibility: hidden;
  transition: opacity 0.3s var(--ease-io), visibility 0.3s;
}
.lightbox.is-open { opacity: 1; visibility: visible; }
.lightbox video {
  width: min(1100px, 92vw); max-height: 82vh;
  background: #000; border-radius: var(--r-md);
  box-shadow: 0 32px 80px rgba(0, 0, 0, 0.5);
}
.lightbox iframe {
  width: min(1100px, 92vw); aspect-ratio: 16 / 9; max-height: 82vh;
  border: 0; background: #000; border-radius: var(--r-md);
  box-shadow: 0 32px 80px rgba(0, 0, 0, 0.5);
}
/* 正文单独成行 B 站地址的自动嵌入（wp_embed handler 输出） */
.rz-bili-embed {
  display: block; width: 100%; max-width: 100%; aspect-ratio: 16 / 9;
  border: 0; background: var(--c-obsidian); border-radius: var(--r);
}
.lightbox__close {
  position: absolute; top: 22px; right: 26px;
  width: 44px; height: 44px;
  border: 1px solid rgba(255, 255, 255, 0.4); border-radius: 50%;
  transition: background-color var(--dur-micro) var(--ease-io), border-color var(--dur-micro) var(--ease-io);
}
.lightbox__close:hover { background: rgba(255, 255, 255, 0.12); border-color: #fff; }
.lightbox__close::before, .lightbox__close::after {
  content: ""; position: absolute; left: 13px; right: 13px; top: 21px; height: 1.5px;
  background: #fff;
}
.lightbox__close::before { transform: rotate(45deg); }
.lightbox__close::after { transform: rotate(-45deg); }
@media (prefers-reduced-motion: reduce) {
  .lightbox { transition: none; }
}