:root {
  --ink: #1a1f26;
  --ink-soft: #3d4654;
  --mist: #7a8494;
  --line: rgba(26, 31, 38, 0.08);
  --line-strong: rgba(26, 31, 38, 0.12);
  --paper: #ffffff;
  --paper-soft: #f7f9fb;
  --paper-mute: #eef2f6;
  --ice: #5a7a94;
  --ice-soft: #8aa4b8;
  --accent: #8b7355;
  --accent-soft: #a89070;
  --pass: #2f6b4f;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --font-display: "Cormorant Garamond", "Noto Serif SC", Georgia, serif;
  --font-serif: "Noto Serif SC", "Cormorant Garamond", Georgia, serif;
  --font-sans: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-weight: 300;
  color: var(--ink-soft);
  background: var(--paper);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
  text-decoration: none;
}

button {
  font: inherit;
  border: none;
  background: none;
  cursor: pointer;
  color: inherit;
}

/* —— Trace Modal —— */
.trace-modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: grid;
  place-items: center;
  padding: 1.5rem;
  opacity: 1;
  visibility: visible;
  transition: opacity 0.5s var(--ease), visibility 0.5s;
}

.trace-modal.is-hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.trace-modal__backdrop {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 50% 30%, rgba(138, 164, 184, 0.2), transparent 55%),
    rgba(248, 250, 252, 0.72);
  backdrop-filter: blur(12px);
}

.trace-modal__panel {
  position: relative;
  width: min(100%, 420px);
  padding: 2.75rem 2rem 2.25rem;
  background: var(--paper);
  border: 1px solid var(--line-strong);
  text-align: center;
  transform: translateY(16px) scale(0.98);
  animation: modalIn 0.7s var(--ease) forwards;
  box-shadow: 0 28px 64px rgba(26, 31, 38, 0.12);
}

@keyframes modalIn {
  to {
    transform: translateY(0) scale(1);
  }
}

.trace-modal__close {
  position: absolute;
  top: 0.85rem;
  right: 0.85rem;
  width: 2.25rem;
  height: 2.25rem;
  display: grid;
  place-items: center;
  color: var(--mist);
  transition: color 0.25s;
}

.trace-modal__close:hover {
  color: var(--ink);
}

.trace-modal__close svg {
  width: 1.15rem;
  height: 1.15rem;
}

.trace-modal__seal {
  width: 3.5rem;
  height: 3.5rem;
  margin: 0 auto 1.25rem;
  display: grid;
  place-items: center;
  border: 1px solid rgba(139, 115, 85, 0.4);
  border-radius: 50%;
  color: var(--accent);
}

.trace-modal__seal svg {
  width: 1.5rem;
  height: 1.5rem;
}

.trace-modal__eyebrow {
  font-size: 0.68rem;
  letter-spacing: 0.28em;
  color: var(--accent);
  margin-bottom: 0.85rem;
}

.trace-modal__title {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(1.25rem, 4vw, 1.55rem);
  line-height: 1.55;
  color: var(--ink);
  margin-bottom: 1.75rem;
}

.trace-modal__id-block {
  padding: 1.15rem 1rem;
  margin-bottom: 1.75rem;
  background: var(--paper-soft);
  border: 1px solid var(--line);
}

.trace-modal__id-label {
  display: block;
  font-size: 0.78rem;
  color: var(--mist);
  letter-spacing: 0.08em;
  margin-bottom: 0.55rem;
}

.trace-modal__id {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(1.15rem, 4.5vw, 1.55rem);
  letter-spacing: 0.08em;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
  word-break: break-all;
  line-height: 1.4;
}

.trace-modal__cta {
  width: 100%;
  padding: 0.95rem 1.5rem;
  background: var(--ink);
  color: var(--paper);
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  transition: background 0.3s, transform 0.3s;
}

.trace-modal__cta:hover {
  background: #2a313c;
  transform: translateY(-1px);
}

/* —— Header —— */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.15rem clamp(1.25rem, 4vw, 3rem);
  transition: background 0.4s, border-color 0.4s, padding 0.4s, box-shadow 0.4s;
  border-bottom: 1px solid transparent;
}

.site-header.is-scrolled {
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(16px);
  border-bottom-color: var(--line);
  box-shadow: 0 8px 24px rgba(26, 31, 38, 0.04);
  padding-top: 0.85rem;
  padding-bottom: 0.85rem;
}

.site-header__brand {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 500;
  letter-spacing: 0.22em;
  color: var(--ink);
}

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

.site-header:not(.is-scrolled) .site-header__brand {
  color: var(--paper);
}

.site-header__nav {
  display: flex;
  gap: 1.5rem;
}

.site-header__nav a {
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: rgba(255, 255, 255, 0.78);
  transition: color 0.25s;
}

.site-header.is-scrolled .site-header__nav a {
  color: var(--mist);
}

.site-header__nav a:hover {
  color: var(--ink);
}

.site-header:not(.is-scrolled) .site-header__nav a:hover {
  color: #fff;
}

.site-header__menu {
  display: none;
  width: 2.75rem;
  height: 2.75rem;
  place-items: center;
  color: #fff;
  -webkit-tap-highlight-color: transparent;
}

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

.site-header__menu svg {
  width: 1.35rem;
  height: 1.35rem;
}

.site-header__menu .icon-close {
  display: none;
}

.site-header.is-nav-open .site-header__menu .icon-menu {
  display: none;
}

.site-header.is-nav-open .site-header__menu .icon-close {
  display: block;
}

@media (max-width: 640px) {
  .site-header__menu {
    display: grid;
  }

  .site-header__nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    padding: 0.5rem 0 calc(0.5rem + env(safe-area-inset-bottom));
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--line-strong);
    box-shadow: 0 16px 32px rgba(26, 31, 38, 0.08);
  }

  .site-header.is-nav-open .site-header__nav {
    display: flex;
  }

  .site-header__nav a {
    padding: 1rem 1.5rem;
    font-size: 0.95rem;
    letter-spacing: 0.16em;
    color: var(--ink-soft) !important;
    border-bottom: 1px solid var(--line);
  }

  .site-header__nav a:last-child {
    border-bottom: none;
  }

  .site-header:not(.is-scrolled) .site-header__brand {
    color: #fff;
  }

  .site-header.is-nav-open:not(.is-scrolled) .site-header__brand,
  .site-header.is-nav-open:not(.is-scrolled) .site-header__menu {
    color: var(--ink);
  }

  .site-header.is-nav-open:not(.is-scrolled) {
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(16px);
  }
}

/* —— Hero —— */
.hero {
  position: relative;
  min-height: 100svh;
  display: grid;
  place-items: center;
  overflow: hidden;
}

.hero__media {
  position: absolute;
  inset: 0;
}

.hero__video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(1.04);
  animation: heroDrift 28s ease-in-out infinite alternate;
}

@keyframes heroDrift {
  to {
    transform: scale(1.1) translate(-1.5%, -1%);
  }
}

.hero__veil {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.18) 0%, rgba(255, 255, 255, 0.08) 35%, rgba(255, 255, 255, 0.82) 100%),
    linear-gradient(180deg, rgba(26, 31, 38, 0.35) 0%, rgba(26, 31, 38, 0.15) 45%, transparent 70%);
}

.hero__content {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 6rem 1.5rem 4rem;
  animation: fadeRise 1.1s var(--ease) 0.15s both;
}

@keyframes fadeRise {
  from {
    opacity: 0;
    transform: translateY(28px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero__tagline {
  font-size: 0.72rem;
  letter-spacing: 0.36em;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 1.25rem;
  text-shadow: 0 1px 12px rgba(0, 0, 0, 0.25);
}

.hero__brand {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(3.6rem, 14vw, 8.5rem);
  letter-spacing: 0.18em;
  line-height: 1;
  color: #fff;
  text-indent: 0.18em;
  margin-bottom: 1.35rem;
  text-shadow: 0 2px 28px rgba(0, 0, 0, 0.28);
}

.hero__desc {
  font-family: var(--font-serif);
  font-size: clamp(0.95rem, 2.5vw, 1.2rem);
  color: var(--ink);
  margin-bottom: 2.25rem;
  letter-spacing: 0.08em;
}

.hero__cta {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.85rem 1.6rem;
  border: 1px solid rgba(26, 31, 38, 0.22);
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(8px);
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  color: var(--ink);
  transition: background 0.35s, border-color 0.35s;
}

.hero__cta svg {
  width: 0.95rem;
  height: 0.95rem;
}

.hero__cta:hover {
  background: #fff;
  border-color: rgba(26, 31, 38, 0.4);
}

.hero__scroll {
  position: absolute;
  bottom: 1.75rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1;
}

.hero__scroll span {
  display: block;
  width: 1px;
  height: 3rem;
  background: linear-gradient(180deg, transparent, var(--ink-soft));
  animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
  0%,
  100% {
    opacity: 0.35;
    transform: scaleY(0.7);
    transform-origin: top;
  }
  50% {
    opacity: 1;
    transform: scaleY(1);
  }
}

/* —— Sections —— */
.section {
  position: relative;
  padding: clamp(4.5rem, 10vw, 7.5rem) 0;
}

.section__inner {
  width: min(1080px, calc(100% - 2.5rem));
  margin: 0 auto;
}

.section__eyebrow {
  font-size: 0.7rem;
  letter-spacing: 0.28em;
  color: var(--accent);
  margin-bottom: 0.85rem;
}

.section__title {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(1.75rem, 4.5vw, 2.6rem);
  color: var(--ink);
  letter-spacing: 0.06em;
  margin-bottom: 1.25rem;
  line-height: 1.3;
}

.section__sub {
  max-width: 32rem;
  color: var(--mist);
  font-size: 0.95rem;
  margin-bottom: 2.5rem;
}

.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.85s var(--ease), transform 0.85s var(--ease);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Brand */
.brand {
  background:
    radial-gradient(ellipse at 20% 0%, rgba(138, 164, 184, 0.12), transparent 50%),
    linear-gradient(180deg, #fff 0%, var(--paper-soft) 100%);
}

.brand__lead {
  max-width: 40rem;
  font-size: 1.05rem;
  color: var(--ink-soft);
  margin-bottom: 3rem;
  line-height: 1.9;
}

.brand__pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem 1.5rem;
  border-top: 1px solid var(--line-strong);
  padding-top: 2.5rem;
}

.brand__pillar svg {
  width: 1.65rem;
  height: 1.65rem;
  color: var(--ice);
  margin-bottom: 1rem;
}

.brand__pillar h3 {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: 1.1rem;
  color: var(--ink);
  margin-bottom: 0.55rem;
  letter-spacing: 0.06em;
}

.brand__pillar p {
  font-size: 0.88rem;
  color: var(--mist);
  line-height: 1.75;
}

/* Specs */
.specs {
  background: var(--paper);
}

.specs__grid {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-top: 1.75rem;
  border: 1px solid var(--line-strong);
  background: var(--paper);
}

.specs__item {
  display: grid;
  grid-template-columns: 1.5rem minmax(0, 5.5rem) 1fr;
  column-gap: 0.75rem;
  align-items: center;
  padding: 0.78rem 1rem;
  background: transparent;
  border-bottom: 1px solid var(--line);
}

.specs__item:last-child {
  border-bottom: none;
}

.specs__item svg {
  width: 1.1rem;
  height: 1.1rem;
  color: var(--ice);
  grid-row: auto;
  align-self: center;
}

.specs__item--accent {
  background: rgba(243, 247, 250, 0.65);
}

.specs__item--wide {
  grid-column: auto;
}

.specs__label {
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.specs__value {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--ink);
  letter-spacing: 0.02em;
  text-align: right;
  word-break: break-word;
}

/* Lab */
.lab {
  background:
    radial-gradient(ellipse at 80% 10%, rgba(168, 144, 112, 0.08), transparent 42%),
    var(--paper-soft);
}

.lab__grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 1rem;
}

.lab__card {
  grid-column: span 2;
  padding: 1.65rem 1.35rem 1.5rem;
  background: var(--paper);
  border: 1px solid var(--line);
  transition: border-color 0.35s, box-shadow 0.35s;
}

.lab__card:nth-child(4) {
  grid-column: 2 / span 2;
}

.lab__card:nth-child(5) {
  grid-column: 4 / span 2;
}

.lab__card:hover {
  border-color: rgba(90, 122, 148, 0.35);
  box-shadow: 0 12px 32px rgba(26, 31, 38, 0.06);
}

.lab__icon {
  margin-bottom: 1rem;
  color: var(--accent-soft);
}

.lab__icon svg {
  width: 1.4rem;
  height: 1.4rem;
}

.lab__name {
  display: block;
  font-size: 0.82rem;
  color: var(--mist);
  margin-bottom: 0.55rem;
  letter-spacing: 0.06em;
}

.lab__num {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 2.1rem;
  color: var(--ink);
  letter-spacing: 0.04em;
  line-height: 1;
}

.lab__unit {
  display: inline-block;
  margin-left: 0.25rem;
  font-size: 0.78rem;
  color: var(--ice);
  letter-spacing: 0.08em;
}

.lab__std {
  display: block;
  margin-top: 0.75rem;
  padding-top: 0.7rem;
  border-top: 1px solid var(--line);
  font-size: 0.75rem;
  color: var(--mist);
  letter-spacing: 0.04em;
}

.lab__std em {
  font-style: normal;
  color: var(--pass);
  font-weight: 500;
}

/* Certificate */
.cert {
  background: var(--paper);
}

.cert__layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3.5rem;
  align-items: center;
}

.cert__text {
  color: var(--ink-soft);
  margin-bottom: 1.75rem;
  line-height: 1.9;
}

.cert__list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.cert__list li {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  font-size: 0.9rem;
  color: var(--mist);
}

.cert__list svg {
  width: 1.1rem;
  height: 1.1rem;
  color: var(--accent);
  flex-shrink: 0;
  margin-top: 0.15rem;
}

.cert__frame {
  perspective: 1000px;
}

.cert__paper {
  position: relative;
  padding: 2.5rem 2rem;
  background:
    linear-gradient(160deg, #f8fafc 0%, #eef3f7 50%, #e6edf3 100%);
  color: var(--ink);
  overflow: hidden;
  border: 1px solid var(--line-strong);
  box-shadow:
    0 24px 48px rgba(26, 31, 38, 0.08),
    inset 0 0 0 1px rgba(255, 255, 255, 0.8);
  transform: rotateY(-4deg) rotateX(2deg);
  transition: transform 0.6s var(--ease);
}

.cert__visual:hover .cert__paper {
  transform: rotateY(0) rotateX(0);
}

.cert__watermark {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-family: var(--font-display);
  font-size: 4.5rem;
  letter-spacing: 0.2em;
  color: rgba(26, 31, 38, 0.035);
  pointer-events: none;
  user-select: none;
}

.cert__paper-brand {
  font-family: var(--font-display);
  font-size: 0.95rem;
  letter-spacing: 0.3em;
  color: #5a6d7e;
  margin-bottom: 1.25rem;
}

.cert__paper-title {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 1.55rem;
  letter-spacing: 0.2em;
  margin-bottom: 0.35rem;
}

.cert__paper-sub {
  font-size: 0.68rem;
  letter-spacing: 0.22em;
  color: #7a8b9c;
  margin-bottom: 1.75rem;
}

.cert__paper-meta {
  display: grid;
  gap: 0.65rem;
  margin-bottom: 1.75rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid rgba(15, 20, 28, 0.1);
}

.cert__paper-meta div {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.82rem;
}

.cert__paper-meta span {
  color: #6a7c8d;
}

.cert__paper-meta em {
  font-style: normal;
  font-weight: 500;
}

.cert__paper-seal {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-size: 0.72rem;
  color: #5a6d7e;
  letter-spacing: 0.04em;
}

.cert__paper-seal svg {
  width: 1.35rem;
  height: 1.35rem;
  color: var(--accent);
}

@media (max-width: 860px) {
  .cert__layout {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .cert__paper {
    transform: none;
  }
}

/* Know + Report */
.know {
  background:
    radial-gradient(ellipse at 10% 80%, rgba(138, 164, 184, 0.1), transparent 40%),
    var(--paper-soft);
}

.know__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin: 2.5rem 0 3.5rem;
}

.know__num {
  font-family: var(--font-display);
  font-size: 1.75rem;
  color: var(--accent);
  letter-spacing: 0.08em;
  margin-bottom: 0.85rem;
  line-height: 1;
}

.know__item h3 {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: 1.15rem;
  color: var(--ink);
  margin-bottom: 0.7rem;
  letter-spacing: 0.05em;
}

.know__item p {
  font-size: 0.9rem;
  color: var(--mist);
  line-height: 1.85;
}

.report {
  border: 1px solid var(--line-strong);
  background: var(--paper);
  overflow: hidden;
  box-shadow: 0 16px 40px rgba(26, 31, 38, 0.04);
}

.report__head {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.5rem 1.75rem;
  border-bottom: 1px solid var(--line);
  background: var(--paper-soft);
}

.report__head svg {
  width: 1.65rem;
  height: 1.65rem;
  color: var(--ice);
  flex-shrink: 0;
}

.report__head h3 {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: 1.2rem;
  color: var(--ink);
  letter-spacing: 0.08em;
}

.report__head p {
  font-size: 0.8rem;
  color: var(--mist);
  margin-top: 0.2rem;
}

.report__gallery {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  padding: 1.25rem;
}

.report__page {
  margin: 0;
}

.report__page:nth-child(3) {
  grid-column: 1 / -1;
  width: 50%;
  justify-self: center;
}

.report__page img {
  width: 100%;
  height: auto;
  display: block;
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: 0 8px 24px rgba(26, 31, 38, 0.06);
  transition: transform 0.4s var(--ease), box-shadow 0.4s var(--ease);
}

.report__page:hover img {
  transform: translateY(-4px);
  box-shadow: 0 16px 36px rgba(26, 31, 38, 0.1);
}

.report__page figcaption {
  margin-top: 0.65rem;
  text-align: center;
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: var(--mist);
}

@media (max-width: 800px) {
  .know__grid {
    grid-template-columns: 1fr;
    gap: 2.25rem;
  }

  .report__gallery {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.85rem;
  }

  .report__page:nth-child(3) {
    grid-column: 1 / -1;
    width: 50%;
    justify-self: center;
  }
}

/* Care */
.care {
  background: linear-gradient(180deg, var(--paper) 0%, var(--paper-soft) 100%);
  padding-bottom: clamp(5rem, 12vw, 8rem);
}

.care__list {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-top: 2.5rem;
  border-top: 1px solid var(--line-strong);
}

.care__item {
  display: grid;
  grid-template-columns: 3.5rem 1fr;
  gap: 1.25rem;
  padding: 1.85rem 0;
  border-bottom: 1px solid var(--line);
}

.care__icon {
  width: 2.75rem;
  height: 2.75rem;
  display: grid;
  place-items: center;
  border: 1px solid rgba(90, 122, 148, 0.25);
  color: var(--ice);
  background: var(--paper);
}

.care__icon svg {
  width: 1.25rem;
  height: 1.25rem;
}

.care__text h3 {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: 1.1rem;
  color: var(--ink);
  margin-bottom: 0.45rem;
  letter-spacing: 0.06em;
}

.care__text p {
  font-size: 0.9rem;
  color: var(--mist);
  line-height: 1.85;
  max-width: 42rem;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--line-strong);
  padding: 3rem 1.25rem;
  text-align: center;
  background: var(--paper);
}

.site-footer__brand {
  font-family: var(--font-display);
  font-size: 1.5rem;
  letter-spacing: 0.28em;
  color: var(--ink);
  margin-bottom: 0.5rem;
  text-indent: 0.28em;
}

.site-footer__note {
  font-size: 0.8rem;
  color: var(--mist);
  letter-spacing: 0.1em;
  margin-bottom: 1.25rem;
}

.site-footer__copy {
  font-size: 0.72rem;
  color: rgba(122, 132, 148, 0.7);
}

body.modal-open {
  overflow: hidden;
}

body.nav-open {
  overflow: hidden;
}

body.is-blocked {
  overflow: hidden;
  min-height: 100dvh;
  background:
    radial-gradient(ellipse at 50% 20%, rgba(138, 164, 184, 0.14), transparent 50%),
    var(--paper-soft);
}

[hidden] {
  display: none !important;
}

/* —— Access block —— */
.access-block {
  min-height: 100dvh;
  display: grid;
  place-items: center;
  padding:
    calc(1.5rem + env(safe-area-inset-top))
    1.25rem
    calc(1.5rem + env(safe-area-inset-bottom));
}

.access-block__card {
  width: min(100%, 400px);
  text-align: center;
  padding: 2.25rem 1.5rem;
  background: var(--paper);
  border: 1px solid var(--line-strong);
  box-shadow: 0 20px 48px rgba(26, 31, 38, 0.06);
}

.access-block__icon {
  width: 3.25rem;
  height: 3.25rem;
  margin: 0 auto 1.25rem;
  display: grid;
  place-items: center;
  border: 1px solid rgba(180, 80, 80, 0.35);
  border-radius: 50%;
  color: #a05050;
}

.access-block__icon svg {
  width: 1.45rem;
  height: 1.45rem;
}

.access-block__title {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: 1.35rem;
  color: var(--ink);
  letter-spacing: 0.06em;
  margin-bottom: 0.75rem;
}

.access-block__desc {
  font-size: 0.92rem;
  color: var(--ink-soft);
  line-height: 1.75;
  margin-bottom: 0.85rem;
}

.access-block__meta {
  font-size: 0.78rem;
  color: var(--mist);
  letter-spacing: 0.04em;
  word-break: break-all;
}

.specs__note {
  margin-top: 0.85rem;
  font-size: 0.78rem;
  color: var(--pass);
  letter-spacing: 0.04em;
}

/* —— Mobile polish —— */
html {
  text-size-adjust: 100%;
}

body {
  -webkit-tap-highlight-color: transparent;
  padding-left: env(safe-area-inset-left);
  padding-right: env(safe-area-inset-right);
}

.site-header {
  padding-top: calc(1.15rem + env(safe-area-inset-top));
  padding-left: max(1.25rem, env(safe-area-inset-left));
  padding-right: max(1.25rem, env(safe-area-inset-right));
}

.site-header.is-scrolled {
  padding-top: calc(0.85rem + env(safe-area-inset-top));
}

.trace-modal {
  padding:
    max(1rem, env(safe-area-inset-top))
    max(1rem, env(safe-area-inset-right))
    max(1rem, env(safe-area-inset-bottom))
    max(1rem, env(safe-area-inset-left));
  align-items: center;
}

.trace-modal__cta,
.hero__cta,
.site-header__menu,
.trace-modal__close {
  touch-action: manipulation;
}

@media (max-width: 768px) {
  .section {
    padding: 2.75rem 0;
  }

  .section__inner {
    width: min(1080px, calc(100% - 1.75rem));
  }

  .section__eyebrow {
    margin-bottom: 0.55rem;
  }

  .section__title {
    font-size: clamp(1.45rem, 6.5vw, 1.9rem);
    margin-bottom: 0.85rem;
  }

  .section__sub,
  .brand__lead {
    font-size: 0.9rem;
    margin-bottom: 1.35rem;
    line-height: 1.75;
  }

  /* 三大要点：一行展示 */
  .brand__pillars {
    grid-template-columns: repeat(3, 1fr);
    gap: 0.5rem;
    padding-top: 1.35rem;
    text-align: center;
  }

  .brand__pillar {
    padding: 0.35rem 0.15rem;
  }

  .brand__pillar svg {
    width: 1.25rem;
    height: 1.25rem;
    margin: 0 auto 0.45rem;
  }

  .brand__pillar h3 {
    font-size: 0.82rem;
    margin-bottom: 0.2rem;
    letter-spacing: 0.02em;
    line-height: 1.35;
  }

  .brand__pillar p {
    font-size: 0.62rem;
    line-height: 1.4;
    letter-spacing: 0;
  }

  .hero {
    min-height: 100svh;
    min-height: 100dvh;
  }

  .hero__content {
    padding: 5.25rem 1.15rem 3.25rem;
    width: 100%;
  }

  .hero__tagline {
    letter-spacing: 0.22em;
    font-size: 0.65rem;
  }

  .hero__brand {
    font-size: clamp(2.6rem, 16vw, 4.5rem);
    letter-spacing: 0.1em;
    text-indent: 0.1em;
    word-break: keep-all;
  }

  .hero__desc {
    font-size: 0.92rem;
    letter-spacing: 0.04em;
    padding: 0 0.25rem;
    line-height: 1.65;
    margin-bottom: 1.75rem;
  }

  .hero__cta {
    min-height: 2.75rem;
    padding: 0.75rem 1.25rem;
  }

  .hero__scroll {
    bottom: calc(1rem + env(safe-area-inset-bottom));
  }

  .trace-modal__panel {
    width: 100%;
    max-height: calc(100dvh - 2rem);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    padding: 2.1rem 1.15rem 1.6rem;
  }

  .trace-modal__seal {
    width: 3rem;
    height: 3rem;
    margin-bottom: 1rem;
  }

  .trace-modal__close {
    width: 2.75rem;
    height: 2.75rem;
    top: 0.4rem;
    right: 0.4rem;
  }

  .trace-modal__cta {
    min-height: 2.85rem;
    font-size: 0.92rem;
  }

  .trace-modal__title {
    font-size: 1.15rem;
    margin-bottom: 1.35rem;
  }

  .trace-modal__id-block {
    padding: 0.95rem 0.75rem;
    margin-bottom: 1.35rem;
  }

  .trace-modal__id {
    font-size: 1.12rem;
    letter-spacing: 0.04em;
  }

  .specs__grid {
    margin-top: 1.15rem;
  }

  .specs__item {
    grid-template-columns: 1.25rem minmax(0, 4.4rem) 1fr;
    column-gap: 0.55rem;
    padding: 0.65rem 0.8rem;
  }

  .specs__item svg {
    width: 1rem;
    height: 1rem;
  }

  .specs__label {
    font-size: 0.7rem;
  }

  .specs__value {
    font-size: 0.86rem;
  }

  /* 检测数据：紧凑列表，降低总高度 */
  .lab .section__sub {
    margin-bottom: 1.15rem;
  }

  .lab__grid {
    display: flex;
    flex-direction: column;
    gap: 0;
    border: 1px solid var(--line-strong);
    background: var(--paper);
  }

  .lab__card,
  .lab__card:nth-child(4),
  .lab__card:nth-child(5) {
    grid-column: auto;
    display: grid;
    grid-template-columns: 1.5rem minmax(0, 1fr) auto auto;
    grid-template-areas:
      "icon name num unit"
      "icon std  std std";
    column-gap: 0.55rem;
    row-gap: 0.1rem;
    align-items: center;
    padding: 0.68rem 0.85rem;
    border: none;
    border-bottom: 1px solid var(--line);
    border-radius: 0;
    box-shadow: none;
    background: transparent;
  }

  .lab__card:last-child {
    border-bottom: none;
  }

  .lab__card:hover {
    border-color: transparent;
    box-shadow: none;
    background: rgba(26, 31, 38, 0.015);
  }

  .lab__icon {
    grid-area: icon;
    margin: 0;
    display: grid;
    place-items: center;
  }

  .lab__icon svg {
    width: 1.05rem;
    height: 1.05rem;
  }

  .lab__name {
    grid-area: name;
    margin: 0;
    font-size: 0.78rem;
    line-height: 1.3;
  }

  .lab__num {
    grid-area: num;
    font-size: 1.15rem;
    line-height: 1;
    justify-self: end;
  }

  .lab__unit {
    grid-area: unit;
    display: inline-block;
    margin: 0;
    font-size: 0.65rem;
    letter-spacing: 0;
    line-height: 1;
  }

  .lab__std {
    grid-area: std;
    margin: 0;
    padding: 0;
    border: none;
    font-size: 0.64rem;
    line-height: 1.3;
  }

  .cert__layout {
    gap: 1.75rem;
  }

  .cert__text {
    margin-bottom: 1.15rem;
    font-size: 0.9rem;
  }

  .cert__list {
    gap: 0.65rem;
  }

  .cert__list li {
    font-size: 0.84rem;
  }

  .cert__paper {
    transform: none;
    padding: 1.5rem 1.15rem;
  }

  .cert__paper-title {
    font-size: 1.2rem;
    letter-spacing: 0.12em;
  }

  .know__grid {
    margin: 1.5rem 0 2rem;
    gap: 1.35rem;
  }

  .know__num {
    font-size: 1.35rem;
    margin-bottom: 0.45rem;
  }

  .know__item h3 {
    font-size: 1.05rem;
    margin-bottom: 0.4rem;
  }

  .know__item p {
    font-size: 0.86rem;
    line-height: 1.7;
  }

  .report__head {
    padding: 1.1rem 1.15rem;
  }

  .report__gallery {
    padding: 0.85rem;
    gap: 0.85rem;
    grid-template-columns: repeat(2, 1fr);
  }

  .report__page:nth-child(3) {
    grid-column: 1 / -1;
    width: 50%;
    justify-self: center;
  }

  .report__page figcaption {
    margin-top: 0.4rem;
  }

  .care__item {
    grid-template-columns: 2.5rem 1fr;
    gap: 0.8rem;
    padding: 1.15rem 0;
  }

  .care__icon {
    width: 2.4rem;
    height: 2.4rem;
  }

  .care__text h3 {
    font-size: 1rem;
    margin-bottom: 0.3rem;
  }

  .care__text p {
    font-size: 0.84rem;
    line-height: 1.7;
  }

  .site-footer {
    padding: 2.1rem 1.15rem calc(2.1rem + env(safe-area-inset-bottom));
  }

  .site-footer__brand {
    letter-spacing: 0.18em;
    text-indent: 0.18em;
  }
}

@media (max-width: 480px) {
  .brand__pillar p {
    display: none;
  }

  .brand__pillar h3 {
    font-size: 0.78rem;
  }

  .know__grid {
    gap: 1.35rem;
  }

  .hero__brand {
    font-size: 2.5rem;
  }

  .reveal {
    transform: translateY(16px);
  }
}

/* 横屏小屏 */
@media (max-height: 480px) and (orientation: landscape) {
  .hero {
    min-height: auto;
    padding: 4.5rem 0 2rem;
  }

  .hero__brand {
    font-size: 2.8rem;
  }

  .hero__scroll {
    display: none;
  }

  .trace-modal {
    align-items: flex-start;
    overflow-y: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .hero__video {
    animation: none;
  }
}