/* Century Huaying — 日系高端轻动态主题 */
:root {
  --ink: #161a1f;
  --slate: #2c323a;
  --muted: #5c6570;
  --line: rgba(28, 35, 44, 0.08);
  --accent: #3d5d7a;
  --accent-soft: #5a7a96;
  --surface: #faf9f7;
  --surface-2: #ffffff;
  --glass: rgba(255, 255, 255, 0.78);
  --glass-border: rgba(255, 255, 255, 0.55);
  --shadow-sm: 0 2px 12px rgba(22, 26, 31, 0.06);
  --shadow-md: 0 8px 32px rgba(22, 26, 31, 0.08);
  --shadow-lg: 0 24px 64px rgba(22, 26, 31, 0.12);
  --radius: 14px;
  --radius-sm: 10px;
  --header-h: 76px;
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-soft: cubic-bezier(0.4, 0, 0.2, 1);
  --font-ja: "Noto Sans JP", "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic UI", YuGothic, Meiryo, sans-serif;
  --font-sans: var(--font-ja);
}

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

html {
  scroll-behavior: smooth;
}

body {
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.85;
  letter-spacing: 0.02em;
  font-feature-settings: "palt" 1;
  background: var(--surface);
  -webkit-font-smoothing: antialiased;
  opacity: 0;
  transition: opacity 0.7s var(--ease-out);
}

body.is-ready {
  opacity: 1;
}

a {
  text-decoration: none;
  color: inherit;
  transition: color 0.35s var(--ease-soft), opacity 0.35s var(--ease-soft), transform 0.35s var(--ease-soft);
}

ul {
  list-style: none;
}

img {
  max-width: 100%;
  height: auto;
  vertical-align: middle;
}

.container {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 clamp(18px, 4vw, 28px);
}

/* —— 全局加载层 —— */
#page-loader {
  position: fixed;
  inset: 0;
  z-index: 10000;
  pointer-events: none;
  background: linear-gradient(135deg, #eef2f5 0%, #f6f4f1 45%, #e8eef3 100%);
  opacity: 1;
  transition: opacity 0.65s var(--ease-out), visibility 0s linear 0.65s;
  visibility: visible;
}

#page-loader::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--accent-soft), transparent);
  transform-origin: left;
  animation: loader-bar 1.1s var(--ease-out) infinite;
}

@keyframes loader-bar {
  0% { transform: scaleX(0.15) translateX(-20%); opacity: 0.6; }
  50% { transform: scaleX(0.55) translateX(10%); opacity: 1; }
  100% { transform: scaleX(0.2) translateX(120%); opacity: 0.5; }
}

#page-loader.is-done {
  opacity: 0;
  visibility: hidden;
}

/* —— 顶栏 —— */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-h);
  z-index: 999;
  background: rgba(255, 255, 255, 0.42);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  box-shadow: none;
  transition: background 0.45s var(--ease-soft), box-shadow 0.45s var(--ease-soft), border-color 0.45s var(--ease-soft);
}

.site-header.is-scrolled {
  background: var(--glass);
  border-bottom-color: var(--line);
  box-shadow: var(--shadow-sm);
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: var(--header-h);
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--slate);
  letter-spacing: 0.04em;
}

.logo img {
  height: 48px;
  width: auto;
  transition: transform 0.45s var(--ease-out);
}

.logo:hover img {
  transform: scale(1.03);
}

.nav-list {
  display: flex;
  gap: clamp(16px, 2.2vw, 28px);
  align-items: center;
}

.nav-item a {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--muted);
  padding: 6px 0;
  position: relative;
}

.nav-item a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1.5px;
  background: linear-gradient(90deg, var(--accent), var(--accent-soft));
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.4s var(--ease-out);
}

.nav-item a:hover {
  color: var(--accent);
}

.nav-item a:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

.hamburger {
  display: none;
  cursor: pointer;
  font-size: 1.35rem;
  color: var(--slate);
  padding: 8px;
  border-radius: var(--radius-sm);
  transition: background 0.3s var(--ease-soft);
}

.hamburger:hover {
  background: rgba(61, 93, 122, 0.08);
}

/* —— Hero —— */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: #fff;
  margin-top: var(--header-h);
  overflow: hidden;
}

.hero-parallax {
  position: absolute;
  inset: -12%;
  background: url("../img/image_4.png") center / cover no-repeat;
  transform: translate3d(0, 0, 0);
  will-change: transform;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(165deg, rgba(12, 18, 26, 0.72) 0%, rgba(22, 32, 44, 0.55) 45%, rgba(18, 28, 38, 0.78) 100%);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 2;
  padding: clamp(32px, 8vh, 80px) 0;
}

.hero-main {
  font-size: clamp(1.35rem, 3.2vw, 2rem);
  font-weight: 600;
  line-height: 1.75;
  letter-spacing: 0.06em;
  margin-bottom: 1.25rem;
  text-shadow: 0 2px 28px rgba(0, 0, 0, 0.35);
  animation: hero-title-in 1.1s var(--ease-out) 0.15s both;
}

.hero-sub {
  font-size: clamp(0.92rem, 1.35vw, 1.05rem);
  max-width: 42em;
  margin: 0 auto;
  opacity: 0.92;
  line-height: 1.9;
  font-weight: 400;
  animation: hero-title-in 1.15s var(--ease-out) 0.35s both;
}

@keyframes hero-title-in {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* —— 区块通用 —— */
section {
  padding: clamp(72px, 12vw, 112px) 0;
  position: relative;
}

.section-title {
  font-size: clamp(1.35rem, 2.4vw, 1.65rem);
  font-weight: 600;
  text-align: center;
  margin-bottom: clamp(40px, 6vw, 56px);
  color: var(--slate);
  letter-spacing: 0.12em;
  position: relative;
}

.section-title::after {
  content: "";
  display: block;
  width: 48px;
  height: 2px;
  margin: 18px auto 0;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  border-radius: 2px;
}

/* —— 滚动浮现 —— */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.75s var(--ease-out), transform 0.75s var(--ease-out);
}

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

.reveal-stagger > * {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.65s var(--ease-out), transform 0.65s var(--ease-out);
}

.reveal-stagger.is-visible > *:nth-child(1) { transition-delay: 0.05s; }
.reveal-stagger.is-visible > *:nth-child(2) { transition-delay: 0.12s; }
.reveal-stagger.is-visible > *:nth-child(3) { transition-delay: 0.19s; }
.reveal-stagger.is-visible > *:nth-child(4) { transition-delay: 0.26s; }
.reveal-stagger.is-visible > *:nth-child(5) { transition-delay: 0.33s; }
.reveal-stagger.is-visible > *:nth-child(6) { transition-delay: 0.4s; }
.reveal-stagger.is-visible > *:nth-child(7) { transition-delay: 0.47s; }
.reveal-stagger.is-visible > *:nth-child(8) { transition-delay: 0.54s; }
.reveal-stagger.is-visible > *:nth-child(9) { transition-delay: 0.61s; }
.reveal-stagger.is-visible > *:nth-child(10) { transition-delay: 0.68s; }

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

/* —— 会社概要 —— */
.company-profile {
  background: linear-gradient(180deg, #ffffff 0%, var(--surface) 100%);
}

.profile-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(28px, 4vw, 40px);
  margin-bottom: 40px;
}

.profile-basic h3,
.profile-detail h3 {
  margin-bottom: 16px;
  font-size: 1.12rem;
  font-weight: 600;
  color: var(--slate);
  letter-spacing: 0.08em;
}

.profile-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  background: var(--surface-2);
  border: 1px solid var(--line);
}

.profile-table th,
.profile-table td {
  border: none;
  border-bottom: 1px solid var(--line);
  padding: 14px 16px;
  text-align: left;
  vertical-align: top;
}

.profile-table tr:last-child th,
.profile-table tr:last-child td {
  border-bottom: none;
}

.profile-table th {
  background: rgba(246, 245, 243, 0.95);
  font-weight: 600;
  width: 30%;
  color: var(--muted);
  font-size: 0.88rem;
}

.profile-table td {
  font-size: 0.92rem;
  color: var(--ink);
}

.name-origin,
.company-philosophy {
  margin-top: 32px;
  padding: 24px;
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.45s var(--ease-soft), transform 0.45s var(--ease-soft);
}

.name-origin:hover,
.company-philosophy:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.profile-img-wrap {
  margin-top: 28px;
}

.profile-img-wrap img,
.map-frame {
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--line);
}

.map-frame {
  width: 100%;
  height: 400px;
  margin-top: 24px;
  overflow: hidden;
  background: #e8ecf0;
  transition: box-shadow 0.45s var(--ease-soft), transform 0.45s var(--ease-soft);
}

.map-frame:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.map-frame iframe {
  display: block;
  width: 100%;
  height: 100%;
  border: 0;
}

/* —— 沿革 —— */
.history {
  background: linear-gradient(180deg, #f1f0ed 0%, #ebe9e5 100%);
}

.history-list {
  max-width: 760px;
  margin: 0 auto;
  border-left: 1px solid rgba(61, 93, 122, 0.35);
  padding-left: clamp(24px, 4vw, 36px);
}

.history-item {
  margin-bottom: 28px;
  position: relative;
  padding: 4px 0 4px 8px;
  transition: transform 0.4s var(--ease-soft);
}

.history-item:hover {
  transform: translateX(4px);
}

.history-item::before {
  content: "";
  position: absolute;
  left: calc(-1 * clamp(24px, 4vw, 36px) - 6px);
  top: 10px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: linear-gradient(145deg, var(--accent-soft), var(--accent));
  box-shadow: 0 0 0 4px rgba(61, 93, 122, 0.15);
}

.history-date {
  font-weight: 600;
  color: var(--slate);
  margin-bottom: 6px;
  letter-spacing: 0.06em;
  font-size: 0.95rem;
}

.history-content {
  color: var(--muted);
  font-size: 0.94rem;
}

/* —— サービス —— */
.service {
  background: var(--surface-2);
}

.service-card {
  background: linear-gradient(165deg, #ffffff 0%, #faf9f7 100%);
  border-radius: var(--radius);
  padding: clamp(24px, 4vw, 36px);
  margin-bottom: clamp(28px, 4vw, 36px);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
  transition: transform 0.5s var(--ease-out), box-shadow 0.5s var(--ease-out), border-color 0.45s var(--ease-soft);
}

.service-card:hover {
  transform: translateY(-4px) scale(1.002);
  box-shadow: var(--shadow-lg);
  border-color: rgba(61, 93, 122, 0.12);
}

.service-card h3 {
  font-size: 1.18rem;
  color: var(--slate);
  margin-bottom: 20px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
  font-weight: 600;
  letter-spacing: 0.06em;
}

.service-card h4 {
  font-size: 1.02rem;
  color: var(--slate);
  margin: 18px 0 10px;
  font-weight: 600;
}

.service-card ul {
  padding-left: 1.25em;
  list-style: disc;
  margin: 10px 0;
}

.service-card ol {
  padding-left: 1.35em;
  list-style: decimal;
  margin: 10px 0;
}

.service-card p {
  margin-bottom: 14px;
  color: var(--ink);
}

.case-item {
  margin: 16px 0;
  padding: 16px 18px;
  border-left: 3px solid var(--accent);
  background: rgba(61, 93, 122, 0.04);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  transition: background 0.4s var(--ease-soft), transform 0.4s var(--ease-soft);
}

.case-item:hover {
  background: rgba(61, 93, 122, 0.07);
  transform: translateX(3px);
}

/* —— お問い合わせ —— */
.contact {
  background: linear-gradient(160deg, #1c2430 0%, #121820 100%);
  color: #e8eaed;
}

.contact .section-title {
  color: #f2f3f5;
}

.contact .section-title::after {
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.55), transparent);
}

.contact-content p {
  margin-bottom: 22px;
  opacity: 0.9;
  max-width: 52em;
  margin-left: auto;
  margin-right: auto;
}

.contact-mail {
  display: inline-block;
  padding: 14px 28px;
  margin: 6px 8px 12px;
  font-weight: 500;
  font-size: 0.92rem;
  letter-spacing: 0.04em;
  border-radius: 999px;
  background: linear-gradient(135deg, #4a6d8c, #3d5d7a);
  color: #fff;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
  transition: transform 0.35s var(--ease-out), box-shadow 0.35s var(--ease-out), filter 0.35s var(--ease-out);
}

.contact-mail:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 36px rgba(0, 0, 0, 0.32);
  filter: brightness(1.06);
}

.contact-mail:active {
  transform: translateY(0);
}

/* —— フッター —— */
footer {
  background: linear-gradient(180deg, #141920 0%, #0d1015 100%);
  color: #9aa3ad;
  padding: 48px 0 40px;
  text-align: center;
}

footer .logo {
  color: #e8eaed;
  justify-content: center;
}

.footer-copy {
  margin-top: 24px;
  font-size: 0.82rem;
  opacity: 0.85;
}

.footer-nav {
  margin-top: 24px;
}

.footer-nav-list {
  max-width: 520px;
  margin: 0 auto;
  text-align: left;
}

.footer-nav-list li {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-nav-list li:first-child {
  border-top: none;
}

.footer-nav-list a,
.footer-nav-divider span {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 13px 0;
  color: #e8eaed;
  font-size: 0.92rem;
  transition: color 0.3s var(--ease-soft), padding-left 0.3s var(--ease-soft);
}

.footer-nav-list a:hover {
  color: #fff;
  padding-left: 6px;
}

.footer-nav-list a::after {
  content: "›";
  opacity: 0.65;
  transition: transform 0.3s var(--ease-out);
}

.footer-nav-list a:hover::after {
  transform: translateX(4px);
}

.footer-nav-divider span {
  color: rgba(255, 255, 255, 0.72);
  font-weight: 600;
}

.footer-nav-divider span::after {
  content: "";
}

.footer-nav-sub a {
  padding-left: 14px;
  color: rgba(255, 255, 255, 0.88);
  font-size: 0.88rem;
}

.footer-nav-sub a::after {
  content: "↗";
}

/* —— 法令ページ —— */
.page-section {
  padding-top: calc(var(--header-h) + 48px);
}

.legal-content {
  max-width: 800px;
  margin: 0 auto;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding: clamp(28px, 5vw, 44px);
  border-radius: var(--radius);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-md);
}

.legal-content table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.legal-content th,
.legal-content td {
  border: none;
  border-bottom: 1px solid var(--line);
  padding: 14px 16px;
  text-align: left;
}

.legal-content tr:last-child th,
.legal-content tr:last-child td {
  border-bottom: none;
}

.legal-content th {
  background: rgba(246, 245, 243, 0.98);
  font-weight: 600;
  width: 30%;
  color: var(--muted);
  font-size: 0.88rem;
}

.legal-content h3 {
  font-size: 1.08rem;
  margin-top: 28px;
  margin-bottom: 12px;
  color: var(--slate);
  font-weight: 600;
  letter-spacing: 0.06em;
}

.legal-content p,
.legal-content ul {
  margin-bottom: 14px;
  color: var(--ink);
}

.legal-content ul {
  padding-left: 1.35em;
  list-style: disc;
}

.legal-content ul.legal-list-numbered {
  list-style: decimal;
}

.legal-content ol {
  padding-left: 1.5em;
  list-style: decimal;
  margin-bottom: 14px;
}

.legal-card-list {
  max-width: 720px;
  margin: 32px auto 0;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.legal-card {
  background: rgba(255, 255, 255, 0.95);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px 26px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: var(--shadow-sm);
  transition: transform 0.45s var(--ease-out), box-shadow 0.45s var(--ease-out), border-color 0.35s var(--ease-soft);
}

.legal-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(61, 93, 122, 0.15);
}

.legal-card-title {
  font-size: 1.08rem;
  font-weight: 600;
  color: var(--slate);
  letter-spacing: 0.05em;
}

.legal-card-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  color: var(--accent);
  flex: 0 0 auto;
  transition: background 0.35s var(--ease-soft), color 0.35s var(--ease-soft);
}

.legal-card:hover .legal-card-icon {
  background: rgba(61, 93, 122, 0.08);
}

/* —— 图片渐显 —— */
.img-reveal {
  opacity: 0;
  transform: scale(1.02);
  transition: opacity 0.85s var(--ease-out), transform 0.85s var(--ease-out);
}

.img-reveal.is-loaded {
  opacity: 1;
  transform: scale(1);
}

/* —— 移动端导航 —— */
@media (max-width: 768px) {
  .nav-list {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    height: calc(100dvh - var(--header-h));
    z-index: 998;
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    flex-direction: column;
    justify-content: flex-start;
    padding-top: 48px;
    gap: 8px;
    transform: translateX(100%);
    opacity: 0;
    visibility: hidden;
    transition: transform 0.45s var(--ease-out), opacity 0.35s var(--ease-soft), visibility 0s linear 0.45s;
    box-shadow: var(--shadow-lg);
  }

  .nav-list.active {
    transform: translateX(0);
    opacity: 1;
    visibility: visible;
    transition: transform 0.45s var(--ease-out), opacity 0.35s var(--ease-soft), visibility 0s linear 0s;
  }

  .nav-item a {
    font-size: 1rem;
    padding: 12px 24px;
  }

  .hamburger {
    display: block;
  }

  .profile-grid {
    grid-template-columns: 1fr;
  }

  section {
    padding: 56px 0;
  }

  .hero-main {
    letter-spacing: 0.04em;
  }
}

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

  .reveal,
  .reveal-stagger > *,
  .hero-main,
  .hero-sub,
  .img-reveal {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
    animation: none !important;
  }

  #page-loader::after {
    animation: none;
  }

  .service-card:hover,
  .legal-card:hover,
  .map-frame:hover,
  .case-item:hover,
  .name-origin:hover,
  .company-philosophy:hover {
    transform: none;
  }
}