@layer reset, tokens, base, layout, components, sections, utilities;

/* ==========================================================================
   Tokens
   ========================================================================== */

@layer tokens {
  :root {
    --forest-950: #0b1f17;
    --forest-900: #0e2a1f;
    --forest-800: #163d2c;
    --green-700: #1f7a4c;
    --green-600: #17633d;
    --sage-500: #6fa286;
    --sage-300: #b7d0bf;
    --sage-100: #eaf3ed;
    --cream-50: #f6f8f7;
    --cream-100: #ffffff;
    --cream-200: #edf1ee;
    --cream-300: #dfe6e1;
    --accent-500: #1f6a42;
    --accent-400: #267a4c;
    --accent-ink: #17633d;
    --ink-900: #14231b;
    --ink-600: #53645a;
    --dark-muted: #c7d3cb;
    --white: #ffffff;
    --accent-light: #a9e3be;
    --warning: #b7791f;
    --header-bg: rgba(246, 248, 247, 0.95);

    --font-display: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", "PingFang SC", "Microsoft YaHei", sans-serif;
    --font-body: "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Microsoft YaHei", sans-serif;
    --font-mono: ui-monospace, "SFMono-Regular", "Cascadia Mono", "Roboto Mono", monospace;

    --container: 1200px;
    --gutter: clamp(20px, 4vw, 48px);
    --section-y: clamp(72px, 9vw, 136px);
    --header-h: 78px;
    --radius: 4px;
    --shadow-soft: 0 24px 60px rgba(7, 26, 18, 0.16);
    --shadow-deep: 0 36px 80px rgba(0, 0, 0, 0.3);
    --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
  }
}

/* ==========================================================================
   Reset
   ========================================================================== */

@layer reset {
  *,
  *::before,
  *::after {
    box-sizing: border-box;
  }

  html {
    scroll-behavior: smooth;
  }

  body,
  h1,
  h2,
  h3,
  h4,
  p,
  figure,
  blockquote,
  dl,
  dd {
    margin: 0;
  }

  ul,
  ol {
    margin: 0;
    padding: 0;
    list-style: none;
  }

  img,
  svg {
    display: block;
    max-width: 100%;
  }

  button,
  input {
    font: inherit;
  }

  a {
    color: inherit;
  }

  [hidden] {
    display: none !important;
  }
}

/* ==========================================================================
   Base
   ========================================================================== */

@layer base {
  html {
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
  }

  body {
    min-width: 320px;
    overflow-x: clip;
    background: var(--cream-50);
    color: var(--ink-900);
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.8;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
  }

  ::selection {
    background: var(--accent-400);
    color: var(--forest-950);
  }

  h1,
  h2,
  h3 {
    font-family: var(--font-display);
    font-weight: 600;
    color: inherit;
    letter-spacing: -0.02em;
  }

  h1 {
    font-size: clamp(2.5rem, 5.1vw, 4.65rem);
    line-height: 1.1;
    text-wrap: balance;
  }

  h2 {
    font-size: clamp(2rem, 3.5vw, 3rem);
    line-height: 1.2;
    text-wrap: balance;
  }

  h3 {
    font-size: clamp(1.25rem, 1.8vw, 1.5rem);
    line-height: 1.4;
  }

  p {
    text-wrap: pretty;
  }

  a {
    text-decoration: none;
  }

  button {
    color: inherit;
  }

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

  .contact :focus-visible,
  .site-footer :focus-visible,
  .mobile-nav :focus-visible {
    outline-color: var(--accent-light);
  }

  section[id] {
    scroll-margin-top: calc(var(--header-h) + 24px);
  }

  .icon {
    width: 18px;
    height: 18px;
    flex: none;
    fill: none;
    stroke: currentColor;
    stroke-width: 1.6;
    stroke-linecap: round;
    stroke-linejoin: round;
  }

  .icon-sprite {
    position: absolute;
    width: 0;
    height: 0;
    overflow: hidden;
  }
}

/* ==========================================================================
   Layout
   ========================================================================== */

@layer layout {
  .container {
    width: min(calc(100% - 2 * var(--gutter)), var(--container));
    margin-inline: auto;
  }

  .section {
    padding-block: var(--section-y);
  }

  .section-head {
    display: grid;
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(24px, 4vw, 64px);
    align-items: end;
    margin-bottom: clamp(34px, 4.5vw, 60px);
  }

  .section-head--compact {
    margin-bottom: clamp(28px, 3.5vw, 44px);
  }

  .section-lede {
    max-width: 34em;
    padding-bottom: 5px;
    color: var(--ink-600);
    font-size: 16px;
    line-height: 1.85;
  }
}

/* ==========================================================================
   Components
   ========================================================================== */

@layer components {
  .visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
    border: 0;
  }

  .skip-link {
    position: fixed;
    top: 12px;
    left: 12px;
    z-index: 300;
    padding: 10px 16px;
    border-radius: 2px;
    background: var(--accent-400);
    color: var(--forest-950);
    font-size: 14px;
    font-weight: 600;
    transform: translateY(-180%);
    transition: transform 0.2s var(--ease);
  }

  .skip-link:focus {
    transform: none;
  }

  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    min-height: 48px;
    padding: 0 22px;
    border: 1px solid transparent;
    border-radius: 2px;
    font-family: var(--font-body);
    font-size: 15px;
    font-weight: 600;
    line-height: 1;
    white-space: nowrap;
    cursor: pointer;
    transition: background-color 0.2s var(--ease), border-color 0.2s var(--ease), color 0.2s var(--ease), transform 0.2s var(--ease);
  }

  .btn:hover {
    transform: translateY(-1px);
  }

  .btn--primary {
    background: var(--accent-400);
    border-color: var(--accent-400);
    color: var(--forest-950);
  }

  .btn--primary:hover {
    background: var(--accent-500);
    border-color: var(--accent-500);
  }

  .btn--ghost {
    background: transparent;
    border-color: rgba(247, 242, 231, 0.36);
    color: var(--cream-50);
  }

  .btn--ghost:hover {
    background: rgba(247, 242, 231, 0.07);
    border-color: var(--cream-50);
  }

  .btn--small {
    min-height: 40px;
    padding: 0 16px;
    font-size: 13px;
  }

  .tag {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 5px 8px;
    border: 1px solid var(--cream-300);
    border-radius: 2px;
    background: var(--cream-50);
    color: var(--ink-600);
    font-family: var(--font-mono);
    font-size: 11px;
    line-height: 1.3;
    letter-spacing: 0.06em;
    white-space: nowrap;
  }

  .tag--green {
    border-color: #cfe0d4;
    background: var(--sage-100);
    color: var(--green-600);
  }

  .visual-note {
    display: inline-block;
    margin-top: 10px;
    color: var(--ink-600);
    font-family: var(--font-mono);
    font-size: 12px;
    line-height: 1.4;
    letter-spacing: 0.08em;
  }

  /* Header ----------------------------------------------------------------- */

  .site-header {
    position: fixed;
    inset: 0 0 auto;
    z-index: 100;
    border-bottom: 1px solid transparent;
    color: var(--cream-50);
    transition: background-color 0.25s var(--ease), border-color 0.25s var(--ease), color 0.25s var(--ease);
  }

  .site-header.is-scrolled {
    border-bottom-color: var(--cream-300);
    background: var(--header-bg);
    color: var(--ink-900);
    -webkit-backdrop-filter: blur(12px);
    backdrop-filter: blur(12px);
  }

  .header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    min-height: var(--header-h);
  }

  .brand {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    flex: none;
    color: inherit;
  }

  .brand__mark {
    display: grid;
    width: 42px;
    height: 42px;
    flex: none;
    place-items: center;
    overflow: hidden;
    border-radius: 9px;
  }

  .brand__mark img {
    width: 38px;
    height: 38px;
    object-fit: contain;
  }

  .brand__text {
    display: flex;
    flex-direction: column;
    gap: 5px;
    line-height: 1;
  }

  .brand__text strong {
    font-family: var(--font-display);
    font-size: 20px;
    font-weight: 600;
    letter-spacing: 0.08em;
  }

  .brand__text small {
    font-family: var(--font-mono);
    font-size: 8px;
    font-weight: 500;
    letter-spacing: 0.24em;
    opacity: 0.62;
  }

  .site-nav {
    display: flex;
    align-items: center;
    gap: clamp(16px, 2.2vw, 30px);
  }

  .site-nav a {
    position: relative;
    padding: 8px 0;
    color: rgba(247, 242, 231, 0.76);
    font-size: 14px;
    line-height: 1.4;
    transition: color 0.2s var(--ease);
  }

  .site-nav a::after {
    content: "";
    position: absolute;
    right: 0;
    bottom: 1px;
    left: 0;
    height: 2px;
    background: var(--accent-500);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.2s var(--ease);
  }

  .site-nav a:hover {
    color: var(--cream-50);
  }

  .site-nav a:hover::after,
  .site-nav a[aria-current="location"]::after {
    transform: scaleX(1);
  }

  .site-nav a[aria-current="location"] {
    color: var(--cream-50);
  }

  .site-header.is-scrolled .site-nav a {
    color: var(--ink-600);
  }

  .site-header.is-scrolled .site-nav a:hover,
  .site-header.is-scrolled .site-nav a[aria-current="location"] {
    color: var(--green-700);
  }

  .header__actions {
    display: flex;
    align-items: center;
    gap: 16px;
    flex: none;
  }

  .header__phone {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    color: rgba(247, 242, 231, 0.7);
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.03em;
    transition: color 0.2s var(--ease);
  }

  .header__phone:hover {
    color: var(--accent-400);
  }

  .header__phone .icon {
    width: 15px;
    height: 15px;
  }

  /* 后台登录入口：与电话信息同层，弱于电话咨询主按钮 */
  .header__login {
    padding: 7px 14px;
    border: 1px solid rgba(247, 242, 231, 0.32);
    border-radius: 999px;
    color: rgba(247, 242, 231, 0.86);
    font-size: 12px;
    letter-spacing: 0.02em;
    white-space: nowrap;
    transition: border-color 0.2s var(--ease), color 0.2s var(--ease), background-color 0.2s var(--ease);
  }

  .header__login:hover {
    border-color: var(--accent-500);
    background: rgba(31, 106, 66, 0.08);
    color: var(--accent-400);
  }

  .site-header.is-scrolled .header__phone {
    color: var(--ink-600);
  }

  .site-header.is-scrolled .header__phone:hover {
    color: var(--green-700);
  }

  .site-header.is-scrolled .brand__text small {
    color: var(--ink-600);
    opacity: 1;
  }

  .nav-toggle {
    display: none;
    width: 44px;
    height: 44px;
    padding: 0;
    place-items: center;
    border: 1px solid rgba(247, 242, 231, 0.24);
    border-radius: 2px;
    background: transparent;
    color: currentColor;
    cursor: pointer;
  }

  .site-header.is-scrolled .nav-toggle {
    border-color: var(--cream-300);
  }

  .nav-toggle .icon {
    width: 20px;
    height: 20px;
  }

  .nav-toggle__close {
    display: none;
  }

  .nav-toggle[aria-expanded="true"] .nav-toggle__open {
    display: none;
  }

  .nav-toggle[aria-expanded="true"] .nav-toggle__close {
    display: block;
  }

  .mobile-nav {
    position: fixed;
    inset: var(--header-h) 0 0;
    z-index: 90;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    padding: 20px var(--gutter) 36px;
    background: var(--forest-950);
    color: var(--cream-50);
  }

  .mobile-nav nav {
    display: flex;
    flex-direction: column;
  }

  .mobile-nav nav a {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 16px;
    padding: 17px 0;
    border-bottom: 1px solid rgba(247, 242, 231, 0.12);
    color: var(--cream-50);
    font-family: var(--font-display);
    font-size: 26px;
    line-height: 1.3;
  }

  .mobile-nav nav a small {
    color: var(--dark-muted);
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.14em;
  }

  .mobile-nav__foot {
    display: flex;
    flex-direction: column;
    gap: 14px;
    margin-top: auto;
    padding-top: 32px;
  }

  .mobile-nav__phone {
    color: var(--accent-400);
    font-family: var(--font-mono);
    font-size: 20px;
    letter-spacing: 0.02em;
  }

  body.nav-open {
    overflow: hidden;
  }

  @media (min-width: 901px) {
    .mobile-nav {
      display: none !important;
    }
  }

  /* Dashboard mock -------------------------------------------------------- */

  .dashboard {
    position: relative;
    width: 100%;
    padding: clamp(16px, 1.8vw, 22px);
    border: 1px solid rgba(247, 242, 231, 0.7);
    border-radius: 4px;
    background: var(--cream-100);
    box-shadow: var(--shadow-deep);
    color: var(--ink-900);
  }

  .dashboard__head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 14px;
    padding-bottom: 13px;
    border-bottom: 1px solid var(--cream-300);
  }

  .dashboard__kicker {
    display: block;
    margin-bottom: 5px;
    color: var(--accent-ink);
    font-family: var(--font-mono);
    font-size: 8px;
    letter-spacing: 0.13em;
  }

  .dashboard__head strong {
    display: block;
    font-family: var(--font-display);
    font-size: 18px;
    font-weight: 600;
    line-height: 1.35;
  }

  .dashboard__meta {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 6px;
    flex: none;
  }

  .dashboard__date {
    color: var(--ink-600);
    font-family: var(--font-mono);
    font-size: 8px;
    letter-spacing: 0.05em;
  }

  .dashboard__tag {
    padding: 2px 5px;
    border: 1px solid #cfe0d4;
    border-radius: 2px;
    background: var(--sage-100);
    color: var(--green-600);
    font-family: var(--font-mono);
    font-size: 7px;
    letter-spacing: 0.08em;
  }

  .dashboard__kpis {
    display: grid;
    grid-template-columns: 1fr 1fr;
    border-bottom: 1px solid var(--cream-300);
  }

  .dashboard__kpi {
    padding: 13px 0 11px;
  }

  .dashboard__kpi:nth-child(odd) {
    padding-right: 14px;
    border-right: 1px solid var(--cream-300);
  }

  .dashboard__kpi:nth-child(even) {
    padding-left: 14px;
  }

  .dashboard__kpi:nth-child(-n + 2) {
    border-bottom: 1px solid var(--cream-300);
  }

  .dashboard__kpi span {
    display: block;
    margin-bottom: 5px;
    color: var(--ink-600);
    font-family: var(--font-mono);
    font-size: 8px;
    letter-spacing: 0.04em;
  }

  .dashboard__kpi strong {
    display: block;
    font-family: var(--font-mono);
    font-size: clamp(19px, 1.75vw, 27px);
    font-weight: 500;
    line-height: 1;
    letter-spacing: -0.035em;
  }

  .dashboard__kpi small {
    margin-left: 2px;
    color: var(--ink-600);
    font-family: var(--font-body);
    font-size: 9px;
    font-weight: 400;
  }

  .dashboard__kpi em {
    display: block;
    margin-top: 4px;
    color: var(--green-600);
    font-family: var(--font-mono);
    font-size: 8px;
    font-style: normal;
  }

  .dashboard__chart {
    padding: 13px 0 8px;
    border-bottom: 1px solid var(--cream-300);
  }

  .dashboard__chart-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 4px;
    color: var(--ink-600);
    font-family: var(--font-mono);
    font-size: 8px;
    letter-spacing: 0.04em;
  }

  .dashboard__legend {
    display: inline-flex;
    align-items: center;
    gap: 5px;
  }

  .dashboard__legend i {
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--green-700);
  }

  .dashboard__svg {
    width: 100%;
    height: auto;
    overflow: visible;
  }

  .dashboard__grid line {
    stroke: var(--cream-300);
    stroke-width: 1;
    stroke-dasharray: 2 4;
  }

  .dashboard__line {
    fill: none;
    stroke: var(--green-700);
    stroke-width: 2;
    stroke-linecap: round;
  }

  .dashboard__dot {
    fill: var(--accent-400);
    stroke: var(--cream-100);
    stroke-width: 2;
  }

  .dashboard__dot-ring {
    fill: none;
    stroke: var(--accent-500);
    stroke-width: 1;
    opacity: 0.5;
  }

  .dashboard__axis {
    display: flex;
    justify-content: space-between;
    margin-top: 3px;
    color: var(--ink-600);
    font-family: var(--font-mono);
    font-size: 7px;
  }

  .dashboard__bottom {
    display: grid;
    grid-template-columns: 1.45fr 1fr;
    gap: 16px;
    padding-top: 12px;
  }

  .dashboard__label {
    display: block;
    margin-bottom: 7px;
    color: var(--ink-600);
    font-family: var(--font-mono);
    font-size: 7px;
    letter-spacing: 0.08em;
  }

  .rank {
    display: grid;
    grid-template-columns: 42px 1fr 38px;
    align-items: center;
    gap: 7px;
    margin-top: 5px;
    color: var(--ink-600);
    font-size: 8px;
  }

  .rank i {
    position: relative;
    height: 5px;
    overflow: hidden;
    border-radius: 1px;
    background: var(--cream-200);
  }

  .rank i::after {
    content: "";
    display: block;
    width: var(--w);
    height: 100%;
    background: var(--green-700);
  }

  .rank b {
    color: var(--ink-900);
    font-family: var(--font-mono);
    font-size: 8px;
    font-weight: 500;
    text-align: right;
  }

  .status {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-top: 6px;
    color: var(--ink-600);
    font-size: 8px;
  }

  .status b {
    margin-left: auto;
    color: var(--ink-900);
    font-family: var(--font-mono);
    font-size: 8px;
    font-weight: 500;
  }

  .status__dot {
    display: inline-block;
    width: 5px;
    height: 5px;
    flex: none;
    border-radius: 50%;
    background: var(--sage-500);
  }

  .status__dot--green {
    background: var(--green-700);
  }

  .status__dot--warning {
    background: var(--warning);
  }

  /* Phone mock ------------------------------------------------------------ */

  .phone {
    width: 196px;
    padding: 5px;
    border: 1px solid rgba(247, 242, 231, 0.18);
    border-radius: 26px;
    background: var(--forest-950);
    box-shadow: 0 24px 50px rgba(0, 0, 0, 0.35);
  }

  .phone__screen {
    overflow: hidden;
    border-radius: 22px;
    background: var(--cream-50);
    color: var(--ink-900);
  }

  .phone__bar {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    padding: 6px 12px 4px;
    background: var(--cream-100);
    color: var(--ink-600);
    font-family: var(--font-mono);
    font-size: 7px;
    letter-spacing: 0.04em;
  }

  .phone__body {
    padding: 10px 12px 14px;
  }

  .phone__top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 6px;
  }

  .phone__tag {
    padding: 2px 5px;
    border: 1px solid #cfe0d4;
    border-radius: 2px;
    background: var(--sage-100);
    color: var(--green-600);
    font-family: var(--font-mono);
    font-size: 7px;
    letter-spacing: 0.06em;
  }

  .phone__brand {
    color: var(--ink-600);
    font-family: var(--font-mono);
    font-size: 7px;
  }

  .phone h3 {
    margin-top: 8px;
    font-family: var(--font-display);
    font-size: 14px;
    line-height: 1.2;
  }

  .phone__meta {
    margin-top: 3px;
    color: var(--ink-600);
    font-family: var(--font-mono);
    font-size: 7px;
    line-height: 1.5;
  }

  .phone__verify {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-top: 8px;
    padding: 6px;
    border: 1px solid #cfe0d4;
    border-radius: 2px;
    background: var(--sage-100);
  }

  .phone__check {
    display: grid;
    width: 18px;
    height: 18px;
    flex: none;
    place-items: center;
    border-radius: 50%;
    background: var(--green-700);
    color: var(--cream-50);
  }

  .phone__check .icon {
    width: 11px;
    height: 11px;
    stroke-width: 2.2;
  }

  .phone__verify > div strong {
    display: block;
    font-size: 8px;
    font-weight: 600;
    line-height: 1.4;
  }

  .phone__verify > div span {
    display: block;
    margin-top: 1px;
    color: var(--ink-600);
    font-size: 6.5px;
    line-height: 1.4;
  }

  .phone__list {
    margin: 8px 0 0;
    border-top: 1px solid var(--cream-300);
  }

  .phone__list > div {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 8px;
    padding: 5px 0;
    border-bottom: 1px solid var(--cream-300);
  }

  .phone__list > div:last-child {
    border-bottom: 0;
  }

  .phone__list dt {
    color: var(--ink-600);
    font-family: var(--font-mono);
    font-size: 7px;
    flex: none;
  }

  .phone__list dd {
    margin: 0;
    max-width: 62%;
    overflow: hidden;
    color: var(--ink-900);
    font-size: 7.5px;
    line-height: 1.5;
    text-align: right;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .phone__records {
    margin-top: 8px;
    padding: 6px;
    border: 1px solid var(--cream-300);
    border-radius: 2px;
    background: var(--cream-100);
  }

  .phone__label {
    display: block;
    margin-bottom: 4px;
    color: var(--ink-600);
    font-family: var(--font-mono);
    font-size: 6.5px;
    letter-spacing: 0.04em;
  }

  .phone__bars {
    display: flex;
    align-items: flex-end;
    gap: 4px;
    height: 34px;
  }

  .phone__bars i {
    flex: 1;
    height: var(--h);
    min-height: 4px;
    border-radius: 1px 1px 0 0;
    background: var(--green-700);
    opacity: 0.86;
  }

  .phone__record-axis {
    display: flex;
    justify-content: space-between;
    margin-top: 4px;
    color: var(--ink-600);
    font-family: var(--font-mono);
    font-size: 6px;
  }

  .phone__note {
    margin-top: 6px;
    color: var(--ink-600);
    font-family: var(--font-mono);
    font-size: 6px;
    line-height: 1.5;
  }

  .mock-caption {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 12px;
    color: rgba(247, 242, 231, 0.62);
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.08em;
  }

  .mock-caption span {
    width: 18px;
    height: 1px;
    background: var(--accent-500);
  }

  /* Role tabs ------------------------------------------------------------- */

  .role-tabs {
    display: grid;
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: clamp(24px, 4vw, 56px);
    padding-top: 24px;
    border-top: 1px solid var(--cream-300);
  }

  .role-tabs__list {
    display: flex;
    flex-direction: column;
    align-self: start;
  }

  .role-tab {
    position: relative;
    display: flex;
    align-items: baseline;
    gap: 12px;
    width: 100%;
    padding: 15px 8px 15px 0;
    border: 0;
    border-bottom: 1px solid var(--cream-300);
    background: transparent;
    color: var(--ink-600);
    font: inherit;
    text-align: left;
    cursor: pointer;
    transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
  }

  .role-tab::before {
    content: attr(data-index);
    flex: none;
    color: var(--accent-ink);
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.08em;
  }

  .role-tab span {
    font-family: var(--font-display);
    font-size: 20px;
    line-height: 1.35;
  }

  .role-tab:hover {
    color: var(--forest-900);
  }

  .role-tab[aria-selected="true"] {
    border-bottom-color: var(--accent-500);
    color: var(--forest-900);
  }

  .role-tab[aria-selected="true"]::before {
    color: var(--accent-500);
  }

  .role-tab[aria-selected="true"] span {
    font-weight: 600;
  }

  .role-panel {
    display: flex;
    min-height: 320px;
    flex-direction: column;
    justify-content: space-between;
    padding: clamp(24px, 3.5vw, 44px);
    border: 1px solid var(--cream-300);
    border-radius: var(--radius);
    background: var(--cream-100);
  }

  .role-panel__quote {
    color: var(--forest-900);
    font-family: var(--font-display);
    font-size: clamp(22px, 2.6vw, 32px);
    line-height: 1.45;
    letter-spacing: -0.01em;
  }

  .role-panel__quote em {
    color: var(--green-700);
    font-style: normal;
  }

  .role-panel ul {
    display: grid;
    gap: 10px;
    margin-top: 28px;
    padding-top: 20px;
    border-top: 1px solid var(--cream-300);
  }

  .role-panel li {
    display: flex;
    gap: 10px;
    color: var(--ink-600);
    font-size: 16px;
    line-height: 1.7;
  }

  .role-panel li::before {
    content: "";
    width: 5px;
    height: 5px;
    flex: none;
    margin-top: 8px;
    background: var(--sage-500);
    transform: rotate(45deg);
  }

  html.js .role-panel:not(.is-active) {
    display: none;
  }

  html:not(.js) .role-tabs__panels {
    display: grid;
    gap: 16px;
  }

  .roles__figure {
    margin: clamp(24px, 3vw, 36px) 0 0;
    padding: 10px;
    border: 1px solid var(--cream-300);
    background: var(--cream-100);
  }

  .roles__figure img {
    display: block;
    width: 100%;
    height: clamp(200px, 26vw, 320px);
    object-fit: cover;
    object-position: center 42%;
  }

  .roles__figure figcaption {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 16px;
    padding: 10px 2px 0;
    color: var(--ink-600);
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 0.06em;
  }

  .roles__figure figcaption span:last-child {
    color: var(--sage-500);
    letter-spacing: 0.14em;
  }

  html:not(.js) .role-tab {
    cursor: default;
  }

  /* QR slot --------------------------------------------------------------- */

  .qr-slot {
    display: flex;
    align-items: center;
    gap: 16px;
    padding-top: 20px;
  }

  .qr-slot__box {
    position: relative;
    flex: none;
    width: 108px;
    padding: 6px;
    border: 0;
    border-radius: 8px;
    background: #fff;
    box-shadow: 0 1px 0 rgba(247, 242, 231, 0.18);
    cursor: zoom-in;
    transition: box-shadow 0.24s ease, transform 0.24s ease;
  }

  .qr-slot__box:hover,
  .qr-slot__box:focus-visible {
    box-shadow: 0 0 0 2px var(--accent-500), 0 6px 20px rgba(0, 0, 0, 0.32);
    transform: translateY(-1px);
  }

  .qr-slot__box:focus-visible {
    outline: 2px solid var(--accent-500);
    outline-offset: 3px;
  }

  .qr-slot__box img {
    display: block;
    width: 100%;
    height: auto;
  }

  .qr-slot__hint {
    position: absolute;
    inset: auto 6px 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    padding: 3px 0;
    border-radius: 4px;
    background: rgba(16, 48, 38, 0.86);
    color: #fff;
    font-family: var(--font-mono);
    font-size: 9px;
    letter-spacing: 0.04em;
    opacity: 0;
    transform: translateY(4px);
    transition: opacity 0.24s ease, transform 0.24s ease;
    pointer-events: none;
  }

  .qr-slot__hint .icon {
    width: 11px;
    height: 11px;
  }

  .qr-slot__box:hover .qr-slot__hint,
  .qr-slot__box:focus-visible .qr-slot__hint {
    opacity: 1;
    transform: translateY(0);
  }

  .qr-slot__text strong {
    display: block;
    color: var(--cream-50);
    font-family: var(--font-display);
    font-size: 17px;
    font-weight: 600;
  }

  .qr-slot__text span {
    display: block;
    max-width: 20em;
    margin-top: 4px;
    color: var(--dark-muted);
    font-size: 11px;
    line-height: 1.6;
  }
}

/* ==========================================================================
   Sections
   ========================================================================== */

@layer sections {
  /* Hero ------------------------------------------------------------------ */

  .hero {
    position: relative;
    display: flex;
    min-height: 100vh;
    min-height: 100svh;
    flex-direction: column;
    justify-content: center;
    overflow: hidden;
    padding-top: calc(var(--header-h) + clamp(46px, 7vw, 96px));
    padding-bottom: clamp(60px, 7vw, 104px);
    background: var(--forest-900);
    color: var(--cream-50);
  }

  .hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image: linear-gradient(rgba(247, 242, 231, 0.045) 1px, transparent 1px);
    background-size: 100% 56px;
    pointer-events: none;
    -webkit-mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.75), transparent 88%);
    mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.75), transparent 88%);
  }

  .hero__rings {
    position: absolute;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
  }

  .hero__rings span {
    position: absolute;
    border: 1px solid rgba(201, 161, 92, 0.14);
    border-radius: 50%;
  }

  .hero__rings span:first-child {
    bottom: -430px;
    left: -340px;
    width: 760px;
    height: 760px;
  }

  .hero__rings span:last-child {
    right: -260px;
    top: -330px;
    width: 620px;
    height: 620px;
    border-color: rgba(100, 164, 124, 0.12);
  }

  .hero__grid {
    position: relative;
    display: grid;
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: center;
    gap: clamp(32px, 5vw, 72px);
  }

  .hero__copy {
    max-width: 660px;
  }

  .hero h1 {
    color: var(--cream-50);
    letter-spacing: -0.035em;
  }

  .hero__accent {
    color: var(--accent-400);
  }

  .hero__lede {
    max-width: 34em;
    margin-top: 26px;
    color: var(--dark-muted);
    font-size: clamp(16px, 1.15vw, 17px);
    line-height: 1.85;
  }

  .hero__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 34px;
  }

  .hero__note {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 26px;
    color: rgba(247, 242, 231, 0.62);
    font-family: var(--font-mono);
    font-size: 12px;
    line-height: 1.6;
    letter-spacing: 0.02em;
  }

  .hero__note-dot {
    width: 5px;
    height: 5px;
    flex: none;
    border-radius: 50%;
    background: var(--sage-500);
    box-shadow: 0 0 0 3px rgba(100, 164, 124, 0.16);
  }

  .hero__visual {
    position: relative;
    width: 100%;
    min-width: 0;
    margin: 0;
    padding-bottom: 38px;
    animation: hero-in 0.8s var(--ease) 0.12s both;
  }

  .trace-chip {
    position: absolute;
    right: 14px;
    bottom: 14px;
    z-index: 2;
    display: flex;
    width: 270px;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border: 1px solid var(--cream-300);
    border-radius: 3px;
    background: var(--cream-100);
    box-shadow: 0 18px 36px rgba(0, 0, 0, 0.22);
  }

  .trace-chip__badge {
    display: grid;
    width: 34px;
    height: 34px;
    flex: none;
    place-items: center;
    border-radius: 2px;
    background: var(--forest-900);
    color: var(--accent-400);
  }

  .trace-chip__badge .icon {
    width: 17px;
    height: 17px;
  }

  .trace-chip__copy strong {
    display: block;
    color: var(--ink-900);
    font-size: 12px;
    font-weight: 600;
    line-height: 1.4;
  }

  .trace-chip__copy span {
    display: block;
    color: var(--ink-600);
    font-family: var(--font-mono);
    font-size: 11px;
    line-height: 1.5;
  }

  .trace-chip__status {
    margin-left: auto;
    padding: 2px 5px;
    border: 1px solid #cfe0d4;
    background: var(--sage-100);
    color: var(--green-600);
    font-family: var(--font-mono);
    font-size: 11px;
    line-height: 1.4;
  }

  @keyframes hero-in {
    from {
      opacity: 0;
      transform: translateY(18px);
    }
    to {
      opacity: 1;
      transform: none;
    }
  }

  /* Specs ----------------------------------------------------------------- */

  .specs {
    position: relative;
    border-bottom: 1px solid var(--cream-300);
    background: var(--cream-50);
  }

  .specs__inner {
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 2.95fr);
    align-items: center;
    gap: clamp(24px, 4vw, 48px);
    padding: 30px 0 18px;
  }

  .specs__label {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--accent-ink);
    font-family: var(--font-mono);
    font-size: 11px;
    line-height: 1.5;
    letter-spacing: 0.12em;
  }

  .specs__label::before {
    content: "";
    width: 24px;
    height: 1px;
    flex: none;
    background: var(--accent-500);
  }

  .specs__grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    margin: 0;
  }

  .specs__item {
    min-width: 0;
    padding: 4px 22px 0;
    border-left: 1px solid var(--cream-300);
  }

  .specs__item:first-child {
    padding-left: 0;
    border-left: 0;
  }

  .specs__item dt {
    display: flex;
    align-items: baseline;
    gap: 4px;
  }

  .specs__num {
    color: var(--forest-900);
    font-family: var(--font-mono);
    font-size: clamp(32px, 3.4vw, 44px);
    font-weight: 500;
    line-height: 1;
    letter-spacing: -0.04em;
  }

  .specs__item small {
    color: var(--ink-600);
    font-size: 11px;
  }

  .specs__item dd {
    margin-top: 6px;
    color: var(--ink-600);
    font-size: 12px;
    line-height: 1.55;
  }

  .specs__note {
    padding-bottom: 18px;
    color: var(--ink-600);
    font-family: var(--font-mono);
    font-size: 12px;
    line-height: 1.5;
    letter-spacing: 0.04em;
    text-align: right;
  }

  /* Capabilities ---------------------------------------------------------- */

  .capabilities {
    background: var(--cream-50);
  }

  .bento {
    display: grid;
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: 16px;
  }

  .cap {
    position: relative;
    display: flex;
    min-height: 300px;
    flex-direction: column;
    overflow: hidden;
    padding: clamp(22px, 2.4vw, 32px);
    border: 1px solid var(--cream-300);
    border-radius: var(--radius);
    background: var(--cream-100);
    transition: border-color 0.2s var(--ease);
  }

  .cap:hover {
    border-color: var(--sage-500);
  }

  .cap__index {
    display: block;
    color: var(--accent-ink);
    font-family: var(--font-mono);
    font-size: 11px;
    line-height: 1.4;
    letter-spacing: 0.12em;
  }

  .cap h3 {
    margin-top: 12px;
    color: inherit;
    font-size: clamp(20px, 2vw, 24px);
  }

  .cap p {
    max-width: 36em;
    margin-top: 10px;
    color: var(--ink-600);
    font-size: 16px;
    line-height: 1.8;
  }

  .cap__visual {
    position: relative;
    min-width: 0;
    margin-top: auto;
    padding-top: 24px;
  }

  .cap--archive {
    display: grid;
    grid-column: span 7;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    grid-template-rows: auto auto 1fr;
    align-items: start;
    column-gap: clamp(20px, 3vw, 40px);
    min-height: 360px;
  }

  .cap--archive .cap__index {
    grid-column: 1;
    grid-row: 1;
  }

  .cap--archive h3 {
    grid-column: 1;
    grid-row: 2;
  }

  .cap--archive > p {
    grid-column: 1;
    grid-row: 3;
  }

  .cap--archive .cap__visual {
    grid-column: 2;
    grid-row: 1 / span 3;
    align-self: center;
    margin-top: 0;
    padding-top: 0;
  }

  .cap--dashboard {
    grid-column: span 5;
    min-height: 360px;
  }

  .cap--iot {
    grid-column: span 5;
    min-height: 380px;
    border-color: var(--forest-800);
    background: var(--forest-900);
    color: var(--cream-50);
  }

  .cap--iot .cap__index {
    color: var(--accent-500);
  }

  .cap--iot h3 {
    color: var(--cream-50);
  }

  .cap--iot p {
    color: var(--dark-muted);
  }

  .cap--iot:hover {
    border-color: var(--sage-500);
  }

  .cap--trace {
    display: grid;
    grid-column: span 7;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    grid-template-rows: auto auto 1fr;
    align-items: start;
    column-gap: clamp(20px, 3vw, 40px);
    min-height: 380px;
  }

  .cap--trace .cap__index {
    grid-column: 1;
    grid-row: 1;
  }

  .cap--trace h3 {
    grid-column: 1;
    grid-row: 2;
  }

  .cap--trace > p {
    grid-column: 1;
    grid-row: 3;
  }

  .cap--trace .cap__visual {
    grid-column: 2;
    grid-row: 1 / span 3;
    align-self: center;
    margin-top: 0;
    padding-top: 0;
  }

  .cap--trace .cap__visual--split {
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
  }

  .cap--trace .scan-mark {
    width: 100%;
    height: 56px;
    grid-auto-flow: column;
    gap: 8px;
  }

  .cap--alerts {
    grid-column: span 6;
  }

  .cap--extra {
    grid-column: span 6;
    border-color: #d5e3d8;
    background: var(--sage-100);
  }

  .tree {
    border-top: 1px solid var(--cream-300);
    color: var(--ink-600);
    font-family: var(--font-mono);
    font-size: 9px;
  }

  .tree__row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 7px 0;
    border-bottom: 1px solid var(--cream-300);
  }

  .tree__row span {
    display: flex;
    align-items: center;
    gap: 8px;
  }

  .tree__row span::before {
    content: "";
    width: 5px;
    height: 5px;
    flex: none;
    border: 1px solid var(--sage-500);
    transform: rotate(45deg);
  }

  .tree__row b {
    color: var(--ink-900);
    font-family: var(--font-mono);
    font-size: 9px;
    font-weight: 500;
  }

  .tree__row--2 {
    padding-left: 18px;
  }

  .tree__row--3 {
    padding-left: 36px;
  }

  .tree__row--4 {
    padding-left: 54px;
  }

  .tree__tags {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    margin-top: 12px;
  }

  .mini-kpis {
    display: grid;
    grid-template-columns: 1fr 1fr;
    margin-bottom: 14px;
    border: 1px solid var(--cream-300);
    background: var(--cream-50);
  }

  .mini-kpis > div {
    padding: 10px 12px;
  }

  .mini-kpis > div:first-child {
    border-right: 1px solid var(--cream-300);
  }

  .mini-kpis span {
    display: block;
    margin-bottom: 4px;
    color: var(--ink-600);
    font-family: var(--font-mono);
    font-size: 8px;
  }

  .mini-kpis strong {
    color: var(--forest-900);
    font-family: var(--font-mono);
    font-size: 21px;
    font-weight: 500;
    line-height: 1;
    letter-spacing: -0.03em;
  }

  .mini-kpis small {
    margin-left: 2px;
    color: var(--ink-600);
    font-family: var(--font-body);
    font-size: 9px;
    font-weight: 400;
  }

  .spark {
    width: 100%;
    height: auto;
  }

  .spark__area {
    fill: rgba(100, 164, 124, 0.16);
  }

  .spark__line {
    fill: none;
    stroke: var(--green-700);
    stroke-width: 1.5;
    stroke-linecap: round;
  }

  .topology {
    width: 100%;
    height: auto;
    margin-top: 2px;
  }

  .topology__links path {
    fill: none;
    stroke: rgba(247, 242, 231, 0.18);
    stroke-width: 1;
    stroke-dasharray: 3 5;
  }

  .topology__node {
    fill: var(--forest-800);
    stroke: rgba(247, 242, 231, 0.25);
    stroke-width: 1;
  }

  .topology__node--host {
    fill: var(--accent-400);
    stroke: var(--accent-500);
  }

  .topology__host-label {
    fill: var(--forest-950);
    font-family: var(--font-body);
    font-size: 10px;
    font-weight: 600;
  }

  .topology__host-sub {
    fill: var(--forest-800);
    font-family: var(--font-mono);
    font-size: 7px;
    letter-spacing: 0.06em;
    opacity: 0.72;
  }

  .topology__device-label {
    fill: var(--dark-muted);
    font-family: var(--font-mono);
    font-size: 8px;
  }

  .iot__legend {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-top: 2px;
    padding-top: 10px;
    border-top: 1px solid rgba(247, 242, 231, 0.14);
    color: var(--dark-muted);
    font-family: var(--font-mono);
    font-size: 11px;
  }

  .iot__legend span {
    display: inline-flex;
    align-items: center;
    gap: 6px;
  }

  .cap__visual--split {
    display: flex;
    align-items: flex-end;
    gap: 20px;
  }

  .trace-mini {
    min-width: 0;
    flex: 1;
    border-top: 1px solid var(--cream-300);
  }

  .trace-mini__row {
    display: grid;
    grid-template-columns: 64px minmax(0, 1fr);
    align-items: center;
    gap: 10px;
    padding: 8px 0;
    border-bottom: 1px solid var(--cream-300);
  }

  .trace-mini__row span {
    color: var(--ink-600);
    font-family: var(--font-mono);
    font-size: 11px;
  }

  .trace-mini__row b {
    overflow: hidden;
    color: var(--ink-900);
    font-size: 12px;
    font-weight: 500;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .scan-mark {
    display: grid;
    width: 96px;
    height: 96px;
    flex: none;
    place-items: center;
    gap: 4px;
    border: 1px dashed var(--sage-500);
    border-radius: 2px;
    background: rgba(100, 164, 124, 0.08);
    color: var(--green-600);
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.06em;
  }

  .scan-mark .icon {
    width: 24px;
    height: 24px;
  }

  .alert-list {
    border-top: 1px solid var(--cream-300);
  }

  .alert-row {
    display: flex;
    align-items: center;
    gap: 9px;
    padding: 9px 0;
    border-bottom: 1px solid var(--cream-300);
    font-size: 12px;
  }

  .alert-row strong {
    color: var(--ink-900);
    font-weight: 500;
  }

  .alert-row > span {
    margin-left: auto;
    color: var(--ink-600);
    font-family: var(--font-mono);
    font-size: 11px;
    white-space: nowrap;
  }

  .alert-row__dot {
    width: 6px;
    height: 6px;
    flex: none;
    border-radius: 50%;
    background: var(--warning);
  }

  .alert-row__dot--green {
    background: var(--green-700);
  }

  .report-strip {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 12px;
  }

  .report-strip span {
    padding: 5px 8px;
    border: 1px solid var(--cream-300);
    background: var(--cream-50);
    color: var(--ink-600);
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.04em;
  }

  .extra-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 18px;
    padding-top: 14px;
    border-top: 1px solid #cfe0d4;
  }

  .extra-item {
    min-width: 0;
  }

  .extra-item .tag {
    border-color: #cfe0d4;
    background: var(--cream-50);
    color: var(--green-600);
  }

  .extra-item strong {
    display: block;
    margin-top: 8px;
    color: var(--forest-900);
    font-family: var(--font-display);
    font-size: 17px;
    font-weight: 600;
  }

  .extra-item p {
    margin-top: 4px;
    color: var(--ink-600);
    font-size: 12px;
    line-height: 1.7;
  }

  /* Path ------------------------------------------------------------------ */

  .path {
    border-top: 1px solid #d5e3d8;
    border-bottom: 1px solid #d5e3d8;
    background: var(--sage-100);
    padding-block: clamp(64px, 7vw, 96px);
  }

  .steps {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    border-top: 1px solid #c9d9cd;
  }

  .steps li {
    position: relative;
    min-height: 190px;
    padding: 28px 32px 0 0;
  }

  .steps li + li {
    padding-left: 32px;
    border-left: 1px solid #c9d9cd;
  }

  .steps li::before {
    content: "";
    position: absolute;
    top: -4px;
    left: 0;
    width: 7px;
    height: 7px;
    background: var(--green-700);
    transform: rotate(45deg);
  }

  .steps li + li::before {
    left: 32px;
  }

  .path__figure {
    margin: clamp(32px, 4vw, 48px) 0 0;
    padding: 10px;
    border: 1px solid #c9d9cd;
    background: var(--cream-100);
  }

  .path__figure img {
    display: block;
    width: 100%;
    height: clamp(240px, 34vw, 430px);
    object-fit: cover;
  }

  .path__figure figcaption {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 16px;
    padding: 10px 2px 0;
    color: var(--ink-600);
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 0.06em;
  }

  .path__figure figcaption span:last-child {
    color: var(--sage-500);
    letter-spacing: 0.14em;
  }

  .step__num {
    color: var(--accent-ink);
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.12em;
  }

  .steps h3 {
    margin-top: 14px;
    color: var(--forest-900);
    font-size: 24px;
  }

  .steps p {
    max-width: 30em;
    margin-top: 10px;
    color: var(--ink-600);
    font-size: 16px;
    line-height: 1.8;
  }

  /* Roles ----------------------------------------------------------------- */

  .roles {
    background: var(--cream-50);
  }

  /* Trace ----------------------------------------------------------------- */

  .trace {
    position: relative;
    overflow: hidden;
    background: var(--forest-900);
    color: var(--cream-50);
    padding-block: var(--section-y);
  }

  .trace::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image: linear-gradient(rgba(247, 242, 231, 0.035) 1px, transparent 1px);
    background-size: 100% 64px;
    pointer-events: none;
    -webkit-mask-image: linear-gradient(to bottom, transparent, #000 35%, transparent 100%);
    mask-image: linear-gradient(to bottom, transparent, #000 35%, transparent 100%);
  }

  .trace__grid {
    position: relative;
    display: grid;
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: center;
    gap: clamp(32px, 6vw, 96px);
  }

  .trace h2 {
    color: var(--cream-50);
    font-size: clamp(2.4rem, 4.2vw, 3.6rem);
  }

  .trace__lede {
    max-width: 30em;
    margin-top: 18px;
    color: var(--dark-muted);
    font-size: 16px;
    line-height: 1.85;
  }

  .trace__points {
    margin-top: 32px;
    border-top: 1px solid rgba(247, 242, 231, 0.14);
  }

  .trace__points li {
    display: grid;
    grid-template-columns: 34px minmax(0, 1fr);
    gap: 14px;
    padding: 16px 0;
    border-bottom: 1px solid rgba(247, 242, 231, 0.14);
  }

  .trace__num {
    padding-top: 4px;
    color: var(--accent-500);
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.06em;
  }

  .trace__points strong {
    color: var(--cream-50);
    font-family: var(--font-display);
    font-size: 17px;
    font-weight: 600;
  }

  .trace__points p {
    margin-top: 4px;
    color: var(--dark-muted);
    font-size: 13px;
    line-height: 1.7;
  }

  .trace__aside {
    margin-top: 24px;
    padding-left: 14px;
    border-left: 2px solid var(--accent-500);
    color: var(--sage-300);
    font-size: 12.5px;
    line-height: 1.7;
  }

  .trace__visual {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0;
    padding: 28px 24px;
  }

  .trace__visual::before {
    content: "";
    position: absolute;
    inset: 10px 8%;
    border: 1px solid rgba(201, 161, 92, 0.22);
    pointer-events: none;
  }

  .phone--trace {
    position: relative;
    z-index: 1;
    width: 290px;
    box-shadow: 0 30px 70px rgba(0, 0, 0, 0.4);
  }

  .phone--trace .phone__bar {
    padding: 8px 16px 6px;
    font-size: 8px;
  }

  .phone--trace .phone__body {
    padding: 14px 16px 18px;
  }

  .phone--trace .phone__tag,
  .phone--trace .phone__brand {
    font-size: 8px;
  }

  .phone--trace h3 {
    font-size: 18px;
  }

  .phone--trace .phone__meta {
    font-size: 8.5px;
  }

  .phone--trace .phone__verify > div strong {
    font-size: 9.5px;
  }

  .phone--trace .phone__verify > div span {
    font-size: 7.5px;
  }

  .phone--trace .phone__list dt {
    font-size: 8px;
  }

  .phone--trace .phone__list dd {
    font-size: 9px;
  }

  .phone--trace .phone__label {
    font-size: 7.5px;
  }

  .phone--trace .phone__bars {
    height: 44px;
  }

  .phone--trace .phone__note {
    font-size: 7px;
  }

  .trace .mock-caption {
    position: absolute;
    right: 24px;
    bottom: 0;
    left: 24px;
    justify-content: center;
  }

  /* About ----------------------------------------------------------------- */

  .about {
    background: var(--cream-50);
  }

  .about__grid {
    display: grid;
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    align-items: center;
    gap: clamp(32px, 6vw, 80px);
  }

  .about h2 {
    margin-bottom: 20px;
  }

  .about__copy p {
    max-width: 34em;
    margin-top: 14px;
    color: var(--ink-600);
    font-size: 16px;
    line-height: 1.85;
  }

  .about__facts {
    margin-top: 30px;
    border-top: 1px solid var(--cream-300);
  }

  .about__facts > div {
    display: grid;
    grid-template-columns: 58px minmax(0, 1fr);
    gap: 16px;
    padding: 11px 0;
    border-bottom: 1px solid var(--cream-300);
  }

  .about__facts dt {
    padding-top: 2px;
    color: var(--accent-ink);
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.08em;
  }

  .about__facts dd {
    overflow-wrap: anywhere;
    color: var(--ink-900);
    font-size: 12.5px;
    line-height: 1.65;
  }

  .about__facts a {
    color: var(--green-600);
    border-bottom: 1px solid rgba(20, 97, 61, 0.3);
  }

  .about__figure {
    margin: 0;
    padding: 10px;
    border: 1px solid var(--cream-300);
    background: var(--cream-100);
  }

  .about__photo {
    position: relative;
    overflow: hidden;
    background: var(--forest-900);
  }

  .about__photo img {
    display: block;
    width: 100%;
    height: auto;
  }

  .about__photo::after {
    content: "";
    position: absolute;
    inset: 0;
    z-index: 2;
    background: linear-gradient(180deg, rgba(11, 42, 29, 0.02), rgba(11, 42, 29, 0.22));
    pointer-events: none;
  }

  .about__photo-tag {
    position: absolute;
    bottom: 12px;
    left: 12px;
    z-index: 3;
    padding: 5px 8px;
    border: 1px solid rgba(247, 242, 231, 0.25);
    background: rgba(7, 26, 18, 0.72);
    color: var(--cream-50);
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.08em;
  }

  .about__figure figcaption {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-top: 10px;
    color: var(--ink-600);
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.08em;
  }

  /* Contact --------------------------------------------------------------- */

  .contact {
    position: relative;
    overflow: hidden;
    background: var(--forest-900);
    color: var(--cream-50);
    padding-top: var(--section-y);
    padding-bottom: clamp(48px, 7vw, 90px);
  }

  .contact::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image: linear-gradient(rgba(247, 242, 231, 0.035) 1px, transparent 1px);
    background-size: 100% 64px;
    pointer-events: none;
    -webkit-mask-image: linear-gradient(to bottom, transparent, #000 40%, transparent 100%);
    mask-image: linear-gradient(to bottom, transparent, #000 40%, transparent 100%);
  }

  .contact__grid {
    position: relative;
    display: grid;
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
    gap: clamp(32px, 6vw, 80px);
  }

  .contact h2 {
    color: var(--cream-50);
    font-size: clamp(2.6rem, 4.6vw, 4.2rem);
    line-height: 1.12;
  }

  .contact__lede {
    max-width: 28em;
    margin-top: 20px;
    color: var(--dark-muted);
    font-size: 16px;
    line-height: 1.85;
  }

  .contact__phone {
    display: inline-block;
    margin-top: 24px;
    padding-bottom: 4px;
    border-bottom: 1px solid rgba(201, 161, 92, 0.35);
    color: var(--accent-400);
    font-family: var(--font-mono);
    font-size: clamp(2rem, 3.6vw, 3.2rem);
    line-height: 1.2;
    letter-spacing: 0.01em;
    transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
  }

  .contact__phone:hover {
    border-color: var(--accent-500);
    color: var(--accent-500);
  }

  .contact__actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 12px;
    margin-top: 26px;
  }

  .copy-status {
    min-height: 1em;
    color: var(--sage-300);
    font-family: var(--font-mono);
    font-size: 9px;
    letter-spacing: 0.04em;
  }

  .contact__side {
    border-top: 1px solid rgba(247, 242, 231, 0.14);
  }

  .contact__block {
    display: grid;
    grid-template-columns: 54px minmax(0, 1fr);
    align-items: start;
    gap: 14px;
    padding: 16px 0;
    border-bottom: 1px solid rgba(247, 242, 231, 0.14);
  }

  .contact__block .label {
    padding-top: 2px;
    color: var(--accent-500);
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.08em;
  }

  .contact__block p {
    overflow-wrap: anywhere;
    color: var(--cream-50);
    font-size: 13px;
    line-height: 1.7;
  }

  /* Footer ---------------------------------------------------------------- */

  .site-footer {
    border-top: 1px solid rgba(247, 242, 231, 0.12);
    background: var(--forest-950);
    color: var(--cream-50);
    padding: 48px 0 26px;
  }

  .footer__grid {
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr) minmax(0, 1.2fr);
    align-items: start;
    gap: 32px;
  }

  .brand--footer .brand__mark {
    width: 38px;
    height: 38px;
  }

  .brand--footer .brand__mark img {
    width: 34px;
    height: 34px;
  }

  .brand--footer .brand__text strong {
    font-size: 18px;
  }

  .footer__tagline {
    margin-top: 12px;
    color: var(--dark-muted);
    font-size: 12px;
    line-height: 1.7;
    letter-spacing: 0.04em;
  }

  .footer__nav {
    display: flex;
    flex-direction: column;
    gap: 9px;
  }

  .footer__nav a {
    width: fit-content;
    border-bottom: 1px solid transparent;
    color: var(--dark-muted);
    font-size: 12px;
    line-height: 1.6;
    transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
  }

  .footer__nav a:hover {
    border-color: var(--accent-500);
    color: var(--cream-50);
  }

  .footer__company p {
    overflow-wrap: anywhere;
    margin-bottom: 4px;
    color: var(--dark-muted);
    font-size: 12px;
    line-height: 1.8;
  }

  .footer__company a {
    border-bottom: 1px solid rgba(247, 242, 231, 0.25);
    color: var(--cream-50);
  }

  .footer__bottom {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 24px;
    margin-top: 36px;
    padding-top: 18px;
    border-top: 1px solid rgba(247, 242, 231, 0.12);
    color: #9aab9f;
    font-size: 11px;
    line-height: 1.65;
  }

  .footer__bottom p:last-child {
    max-width: 40em;
    text-align: right;
  }

  .footer__icp {
    border-bottom: 1px solid rgba(247, 242, 231, 0.28);
    color: var(--cream-50);
  }

  .footer__icp:hover {
    border-color: var(--cream-50);
  }
}

/* ==========================================================================
   Utilities
   ========================================================================== */

@layer utilities {
  html.reveal-ready [data-reveal] {
    opacity: 0;
    transform: translateY(14px);
    transition: opacity 0.55s var(--ease), transform 0.55s var(--ease);
  }

  html.reveal-ready [data-reveal].is-visible {
    opacity: 1;
    transform: none;
  }

  @media (prefers-reduced-motion: reduce) {
    html {
      scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
      animation-duration: 0.01ms !important;
      animation-iteration-count: 1 !important;
      transition-duration: 0.01ms !important;
    }

    html.reveal-ready [data-reveal] {
      opacity: 1;
      transform: none;
    }
  }
}

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 1120px) {
  .header__phone span {
    display: none;
  }

  .site-nav {
    gap: 16px;
  }

  .cap--archive,
  .cap--trace {
    display: flex;
  }

  .cap--archive .cap__visual,
  .cap--trace .cap__visual {
    margin-top: auto;
    padding-top: 24px;
  }

  .cap--trace .cap__visual--split {
    flex-direction: row;
    align-items: flex-end;
  }

  .cap--trace .scan-mark {
    width: 96px;
    height: 96px;
    grid-auto-flow: row;
  }

  .trace-chip {
    position: static;
    width: 100%;
    margin-top: 12px;
  }
}

@media (max-width: 900px) {
  :root {
    --header-h: 68px;
  }

  .site-nav {
    display: none;
  }

  .nav-toggle {
    display: grid;
  }

  .header__phone {
    display: none;
  }

  .hero__grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 48px;
  }

  .hero__copy {
    max-width: 680px;
  }

  .hero__visual {
    max-width: 620px;
    margin-inline: auto;
  }

  .section-head {
    grid-template-columns: minmax(0, 1fr);
    gap: 18px;
  }

  .section-lede {
    max-width: 40em;
  }

  .cap--archive,
  .cap--dashboard,
  .cap--iot,
  .cap--trace,
  .cap--alerts,
  .cap--extra {
    grid-column: span 6;
  }

  .cap--archive,
  .cap--dashboard {
    min-height: 350px;
  }

  .cap--iot,
  .cap--trace {
    min-height: 390px;
  }

  .role-tabs {
    grid-template-columns: minmax(0, 1fr);
    gap: 20px;
  }

  .role-tabs__list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    border-top: 1px solid var(--cream-300);
  }

  .role-tab {
    padding: 12px 10px;
  }

  .role-tab:nth-child(odd) {
    border-right: 1px solid var(--cream-300);
  }

  .trace__grid,
  .about__grid,
  .contact__grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .trace__visual {
    order: 2;
  }

  .about__figure {
    max-width: 680px;
    margin-inline: auto;
  }

  .footer__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }

  .footer__company {
    grid-column: 1 / -1;
  }
}

@media (max-width: 768px) {
  .specs__inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 18px;
    padding: 26px 0 18px;
  }

  .specs__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .specs__item {
    padding: 14px 16px;
    border-top: 1px solid var(--cream-300);
    border-left: 1px solid var(--cream-300);
  }

  .specs__item:nth-child(odd) {
    padding-left: 0;
    border-left: 0;
  }

  .specs__item:nth-child(-n + 2) {
    padding-top: 0;
    border-top: 0;
  }

  .specs__item:nth-child(even) {
    padding-right: 0;
  }

  .specs__note {
    padding-bottom: 20px;
    text-align: left;
  }

  .bento {
    gap: 14px;
  }

  .cap {
    min-height: 0;
  }

  .cap--archive,
  .cap--dashboard,
  .cap--iot,
  .cap--trace,
  .cap--alerts,
  .cap--extra {
    grid-column: 1 / -1;
  }

  .cap--archive,
  .cap--dashboard,
  .cap--iot,
  .cap--trace {
    min-height: 0;
  }

  .cap--trace .cap__visual--split {
    align-items: stretch;
  }

  .steps {
    grid-template-columns: minmax(0, 1fr);
  }

  .steps li {
    min-height: 0;
    padding: 24px 0 24px 28px;
    border-left: 1px solid #c9d9cd;
  }

  .steps li + li {
    padding-left: 28px;
    border-left: 1px solid #c9d9cd;
  }

  .steps li::before {
    top: 31px;
    left: -4px;
  }

  .steps li + li::before {
    left: -4px;
  }

  .steps p {
    max-width: 36em;
  }

  .trace__visual {
    padding: 24px 16px 34px;
  }

  .phone--trace {
    width: min(300px, 82vw);
  }

  .footer__grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 26px;
  }

  .footer__company {
    grid-column: auto;
  }

  .footer__nav {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 8px 18px;
  }

  .footer__nav a {
    display: inline-flex;
    min-height: 44px;
    align-items: center;
  }

  .footer__bottom {
    flex-direction: column;
    gap: 8px;
  }

  .footer__bottom p:last-child {
    text-align: left;
  }
}

@media (max-width: 560px) {
  :root {
    --gutter: 20px;
    --section-y: clamp(64px, 12vw, 88px);
  }

  .header__cta {
    display: none;
  }

  .header__login {
    display: none;
  }

  .header__actions {
    gap: 10px;
  }

  .hero {
    padding-top: calc(var(--header-h) + 44px);
    padding-bottom: 60px;
  }

  .hero h1 {
    font-size: clamp(2.25rem, 9vw, 3rem);
    line-height: 1.14;
  }

  .hero__lede {
    margin-top: 20px;
    font-size: 16px;
  }

  .hero__actions {
    margin-top: 26px;
  }

  .hero__actions .btn {
    width: 100%;
  }

  .hero__note {
    align-items: flex-start;
    font-size: 12px;
  }

  .hero__note-dot {
    margin-top: 6px;
  }

  .hero__rings span:first-child {
    bottom: -500px;
    left: -400px;
  }

  .hero__rings span:last-child {
    right: -360px;
    top: -300px;
  }

  .dashboard {
    padding: 14px;
  }

  .dashboard__head strong {
    font-size: 16px;
  }

  .dashboard__kicker {
    font-size: 7px;
  }

  .dashboard__kpi {
    padding-top: 11px;
    padding-bottom: 10px;
  }

  .dashboard__kpi strong {
    font-size: 21px;
  }

  .dashboard__bottom {
    grid-template-columns: minmax(0, 1fr);
    gap: 10px;
  }

  .dashboard__rank {
    display: none;
  }

  .dashboard__status {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 14px;
  }

  .dashboard__status .status {
    margin-top: 0;
  }

  .dashboard__status .status span {
    margin-left: 0;
  }

  .dashboard__status .status b {
    margin-left: 4px;
  }

  .dashboard__axis span:nth-child(even) {
    display: none;
  }

  .dashboard__chart-head {
    font-size: 7px;
  }

  .section-head h2 {
    font-size: clamp(1.8rem, 7.2vw, 2.4rem);
  }

  .specs__num {
    font-size: 32px;
  }

  .specs__item dd {
    font-size: 11px;
  }

  .cap--trace .cap__visual--split {
    flex-direction: column;
    align-items: stretch;
  }

  .cap--trace .scan-mark {
    width: 100%;
    height: 64px;
    grid-auto-flow: column;
    gap: 8px;
  }

  .extra-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 14px;
  }

  .role-panel {
    min-height: 0;
    padding: 24px;
  }

  .role-panel__quote {
    font-size: 22px;
  }

  .trace h2 {
    font-size: clamp(2.2rem, 9vw, 2.8rem);
  }

  .trace__lede {
    font-size: 16px;
  }

  .trace__points li {
    grid-template-columns: 26px minmax(0, 1fr);
    gap: 10px;
  }

  .contact h2 {
    font-size: clamp(2.2rem, 9vw, 2.8rem);
  }

  .contact__phone {
    font-size: clamp(1.8rem, 8vw, 2.4rem);
  }

  .contact__actions .btn {
    width: 100%;
  }

  .qr-slot {
    align-items: flex-start;
  }

  .about__facts > div {
    grid-template-columns: 46px minmax(0, 1fr);
    gap: 12px;
  }

  .about__figure {
    padding: 7px;
  }

  .about__figure figcaption {
    font-size: 11px;
  }
}

@media (max-width: 380px) {
  .brand__text small {
    display: none;
  }

  .mobile-nav nav a {
    font-size: 23px;
  }

  .role-tabs__list {
    grid-template-columns: minmax(0, 1fr);
  }

  .role-tab:nth-child(odd) {
    border-right: 0;
  }

  .role-tab {
    padding-left: 0;
  }

  .dashboard__kpi strong {
    font-size: 19px;
  }

  .dashboard__tag {
    display: none;
  }
}

/* ==========================================================================
   Chosen palette — 清爽白底 + 品牌绿 (A)
   Light hero and trace, deep-green contact close, green primary accents.
   ========================================================================== */

.site-header.is-scrolled {
  background: var(--header-bg);
}

.site-header:not(.is-scrolled) {
  color: var(--ink-900);
}

.site-header:not(.is-scrolled) .site-nav a {
  color: var(--ink-600);
}

.site-header:not(.is-scrolled) .site-nav a:hover,
.site-header:not(.is-scrolled) .site-nav a[aria-current="location"] {
  color: var(--green-700);
}

.site-header:not(.is-scrolled) .header__phone {
  color: var(--ink-600);
}

.site-header.is-scrolled .header__login,
.site-header:not(.is-scrolled) .header__login {
  border-color: var(--cream-300);
  color: var(--ink-600);
}

.site-header.is-scrolled .header__login:hover,
.site-header:not(.is-scrolled) .header__login:hover {
  border-color: var(--accent-500);
  background: rgba(31, 106, 66, 0.06);
  color: var(--green-700);
}

.site-header:not(.is-scrolled) .brand__text small {
  color: var(--ink-600);
  opacity: 1;
}

.site-header:not(.is-scrolled) .nav-toggle {
  border-color: var(--cream-300);
  color: var(--ink-900);
}

.btn--primary,
.btn--primary:hover,
.skip-link {
  color: #ffffff;
}

.hero {
  background: var(--cream-50);
  color: var(--ink-900);
}

.hero::before {
  background-image: linear-gradient(rgba(20, 35, 27, 0.055) 1px, transparent 1px);
}

.hero__rings span:first-child {
  border-color: rgba(31, 122, 76, 0.14);
}

.hero__rings span:last-child {
  border-color: rgba(47, 143, 91, 0.12);
}

.hero h1 {
  color: var(--ink-900);
}

.hero__accent {
  color: var(--green-700);
}

.hero__lede,
.hero__note {
  color: var(--ink-600);
}

.hero .btn--ghost {
  border-color: var(--ink-900);
  color: var(--ink-900);
}

.hero .btn--ghost:hover {
  background: rgba(20, 35, 27, 0.05);
  border-color: var(--ink-900);
}

.hero .mock-caption {
  color: var(--ink-600);
}

.hero .mock-caption span,
.trace .mock-caption span {
  background: var(--green-700);
}

.trace {
  background: var(--sage-100);
  color: var(--ink-900);
}

.trace::before {
  background-image: linear-gradient(rgba(20, 35, 27, 0.04) 1px, transparent 1px);
}

.trace h2 {
  color: var(--ink-900);
}

.trace__lede {
  color: var(--ink-600);
}

.trace__points {
  border-top-color: var(--cream-300);
}

.trace__points li {
  border-bottom-color: var(--cream-300);
}

.trace__points strong {
  color: var(--ink-900);
}

.trace__points p {
  color: var(--ink-600);
}

.trace__num {
  color: var(--green-700);
}

.trace__aside {
  border-left-color: var(--green-700);
  color: var(--green-600);
}

.trace__visual::before {
  border-color: rgba(31, 122, 76, 0.2);
}

.trace .mock-caption {
  color: var(--ink-600);
}

.trace-chip__badge {
  color: var(--accent-light);
}

.cap--iot .cap__index {
  color: var(--accent-light);
}

.topology__node--host {
  fill: var(--accent-light);
  stroke: var(--green-700);
}

.topology__host-label {
  fill: var(--forest-950);
}

.topology__host-sub {
  fill: var(--forest-800);
}

.mobile-nav__phone {
  color: var(--accent-light);
}

.mobile-nav .btn--primary {
  border-color: var(--accent-light);
  background: var(--accent-light);
  color: var(--forest-950);
}

.mobile-nav .btn--primary:hover {
  border-color: #ffffff;
  background: #ffffff;
  color: var(--forest-950);
}

.contact__phone {
  border-bottom-color: rgba(255, 255, 255, 0.3);
  color: var(--accent-light);
}

.contact__phone:hover {
  border-color: #ffffff;
  color: #ffffff;
}

.contact__block .label {
  color: var(--accent-light);
}

.contact .btn--primary {
  border-color: var(--accent-light);
  background: var(--accent-light);
  color: var(--forest-950);
}

.contact .btn--primary:hover {
  border-color: #ffffff;
  background: #ffffff;
  color: var(--forest-950);
}

.copy-status {
  color: var(--accent-light);
}

/* ==========================================================================
   QR zoom（小程序码放大浮层）
   ========================================================================== */

/*
 * 悬停/聚焦时以固定定位浮层显示，避免被 contact 区块的 overflow 裁切；
 * 具体坐标由 main.js 按触发器位置计算后写入行内 left/top。
 */
.qr-zoom {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 400;
  width: 248px;
  padding: 10px;
  border-radius: 12px;
  background: #fff;
  box-shadow: 0 18px 48px rgba(7, 26, 18, 0.28), 0 0 0 1px rgba(11, 31, 23, 0.08);
  opacity: 0;
  transform: translateY(-6px) scale(0.97);
  transform-origin: top left;
  transition: opacity 0.2s var(--ease), transform 0.2s var(--ease);
  pointer-events: none;
}

.qr-zoom[hidden] {
  display: none;
}

.qr-zoom.is-open {
  opacity: 1;
  transform: translateY(0) scale(1);
}

.qr-zoom__img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 4px;
}

.qr-zoom__caption {
  margin: 8px 0 2px;
  color: var(--green-700);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.04em;
  text-align: center;
}

.qr-backdrop {
  position: fixed;
  inset: 0;
  z-index: 399;
  background: rgba(6, 18, 13, 0.78);
  opacity: 0;
  transition: opacity 0.2s var(--ease);
}

.qr-backdrop[hidden] {
  display: none;
}

.qr-backdrop.is-open {
  opacity: 1;
}

/* 触屏模式（点击触发）：浮层居中并允许点击遮罩关闭 */
.is-touch .qr-zoom {
  top: 50% !important;
  left: 50% !important;
  width: min(76vw, 300px);
  transform: translate(-50%, -50%) scale(0.94);
  transform-origin: center;
  pointer-events: auto;
}

.is-touch .qr-zoom.is-open {
  transform: translate(-50%, -50%) scale(1);
}

@media (prefers-reduced-motion: reduce) {
  .qr-zoom,
  .qr-backdrop {
    transition-duration: 0.01ms;
  }
}