/* ========================================
   白雪株式会社 - Site Stylesheet
   和风设计语言 / Wafu Design Language
   ======================================== */

@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+JP:wght@400;500;600&family=Noto+Sans+JP:wght@300;400;500&family=Noto+Serif+SC:wght@400;500;600&family=Noto+Sans+SC:wght@300;400;500&family=Cormorant+Garamond:wght@400;500;600&display=swap');

:root {
  --color-paper:     #faf7ef;   /* 和纸暖白 */
  --color-paper-2:   #ede5d0;   /* 米色 分层 */
  --color-paper-3:   #f5f1e8;   /* 中间过渡 */
  --color-ink:       #1a1a1a;   /* 墨色 */
  --color-ink-2:     #4a4a4a;   /* 次要文字 */
  --color-ink-3:     #888780;   /* 辅助文字 */
  --color-line:      #d4ccb8;   /* 分割线 */
  --color-shu:       #a8312d;   /* 朱色 朱印 */
  --color-shu-deep:  #8a2624;   /* 朱色深 */

  --font-serif-ja:   'Noto Serif JP', 'Noto Serif SC', serif;
  --font-sans-ja:    'Noto Sans JP', 'Noto Sans SC', sans-serif;
  --font-serif-en:   'Cormorant Garamond', 'Noto Serif JP', serif;

  --max-width:       1200px;
  --content-width:   1080px;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-sans-ja);
  font-size: 15px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: inherit; text-decoration: none; transition: opacity 0.2s; }
a:hover { opacity: 0.6; }

img { max-width: 100%; height: auto; display: block; }

/* ========== Header ========== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-paper);
  border-bottom: 0.5px solid var(--color-line);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 18px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand-mark {
  width: 36px;
  height: 36px;
  background: var(--color-shu);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif-ja);
  font-size: 18px;
  font-weight: 500;
  color: var(--color-paper);
}

.brand-name {
  font-family: var(--font-serif-ja);
  font-size: 17px;
  letter-spacing: 4px;
  color: var(--color-ink);
}

.nav {
  display: flex;
  align-items: center;
  gap: 30px;
}

.nav a {
  font-size: 13px;
  letter-spacing: 1px;
  color: var(--color-ink);
}

.nav .nav-cta {
  background: var(--color-ink);
  color: var(--color-paper);
  padding: 10px 20px;
  letter-spacing: 2px;
}
.nav .nav-cta:hover { opacity: 0.85; background: var(--color-shu); }

.lang-switch {
  display: flex;
  gap: 8px;
  padding-left: 16px;
  border-left: 0.5px solid var(--color-line);
  font-size: 11px;
  color: var(--color-ink-3);
  letter-spacing: 1px;
}
.lang-switch a.active { color: var(--color-ink); font-weight: 500; }

/* ========== Hero ========== */

.hero {
  background: var(--color-paper);
  padding: 110px 32px 130px;
  position: relative;
  overflow: hidden;
}

.hero-inner {
  max-width: var(--content-width);
  margin: 0 auto;
  position: relative;
}

.hero-seal {
  position: absolute;
  top: -20px;
  right: 0;
  width: 80px;
  height: 80px;
  background: var(--color-shu);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-paper);
  font-family: var(--font-serif-en);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0;
  line-height: 1.3;
  text-align: center;
  transform: rotate(-4deg);
}

.hero-eyebrow {
  font-size: 11px;
  color: var(--color-shu);
  letter-spacing: 6px;
  margin-bottom: 36px;
}

.hero-title-row {
  display: flex;
  align-items: flex-start;
  gap: 32px;
  margin-bottom: 36px;
}

.hero-title-line {
  width: 3px;
  background: var(--color-ink);
  margin-top: 12px;
  align-self: stretch;
}

.hero-title {
  font-family: var(--font-serif-ja);
  font-size: 56px;
  font-weight: 500;
  color: var(--color-ink);
  line-height: 1.4;
  letter-spacing: 6px;
}

.hero-lead {
  font-size: 15px;
  color: var(--color-ink-2);
  line-height: 2.1;
  max-width: 560px;
  margin-bottom: 44px;
  margin-left: 35px;
}

.hero-buttons {
  display: flex;
  gap: 14px;
  margin-left: 35px;
}

.btn-primary {
  background: var(--color-ink);
  color: var(--color-paper);
  padding: 16px 32px;
  font-size: 13px;
  letter-spacing: 3px;
  display: inline-block;
}
.btn-primary:hover { background: var(--color-shu); opacity: 1; }

.btn-secondary {
  background: transparent;
  color: var(--color-ink);
  padding: 16px 32px;
  font-size: 13px;
  letter-spacing: 3px;
  border: 0.5px solid var(--color-ink);
  display: inline-block;
}
.btn-secondary:hover { background: var(--color-ink); color: var(--color-paper); opacity: 1; }

/* ========== Section Common ========== */

.section {
  padding: 80px 32px 96px;
}

.section-paper-2 { background: var(--color-paper-2); }
.section-paper { background: var(--color-paper); }

.section-inner {
  max-width: var(--content-width);
  margin: 0 auto;
}

.section-header {
  display: flex;
  align-items: baseline;
  gap: 22px;
  margin-bottom: 50px;
}

.section-title {
  font-family: var(--font-serif-ja);
  font-size: 32px;
  color: var(--color-ink);
  letter-spacing: 8px;
  font-weight: 500;
}

.section-divider {
  flex: 1;
  height: 0.5px;
  background: var(--color-line);
}

.section-en {
  font-size: 11px;
  color: var(--color-ink-3);
  letter-spacing: 4px;
}

/* ========== Business Cards ========== */

.business-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr;
  gap: 16px;
}

@media (max-width: 1100px) {
  .business-grid { grid-template-columns: 1fr 1fr; }
}

.business-card {
  background: var(--color-paper);
  padding: 32px 24px 30px;
  position: relative;
  border-top: 1px solid var(--color-ink);
  transition: transform 0.3s;
}

.business-card.highlight { border-top-color: var(--color-shu); }

.business-card:hover { transform: translateY(-4px); }

.business-num {
  font-family: var(--font-serif-ja);
  font-size: 38px;
  color: var(--color-shu);
  line-height: 1;
  margin-bottom: 22px;
  font-weight: 400;
}

.business-divider {
  width: 28px;
  height: 0.5px;
  background: var(--color-ink);
  margin-bottom: 22px;
}

.business-title {
  font-family: var(--font-serif-ja);
  font-size: 20px;
  color: var(--color-ink);
  margin-bottom: 16px;
  font-weight: 500;
  letter-spacing: 2px;
}

.business-desc {
  font-size: 13px;
  color: var(--color-ink-2);
  line-height: 2;
  margin-bottom: 26px;
}

.business-link {
  font-size: 12px;
  color: var(--color-ink);
  letter-spacing: 2px;
}
.business-link:hover { color: var(--color-shu); opacity: 1; }

/* ========== Strengths ========== */

.strengths-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 44px;
}

.strength-num {
  font-family: var(--font-serif-ja);
  font-size: 14px;
  color: var(--color-shu);
  letter-spacing: 3px;
  margin-bottom: 16px;
}

.strength-title {
  font-family: var(--font-serif-ja);
  font-size: 17px;
  color: var(--color-ink);
  font-weight: 500;
  margin-bottom: 16px;
  letter-spacing: 2px;
}

.strength-desc {
  font-size: 13px;
  color: var(--color-ink-2);
  line-height: 2;
}

.strength-highlight {
  display: inline-block;
  font-family: var(--font-serif-ja);
  font-size: 28px;
  color: var(--color-shu);
  font-weight: 500;
  margin: 4px 6px;
}

/* ========== News ========== */

.news-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 36px;
}

.news-header .section-title-group {
  display: flex;
  align-items: baseline;
  gap: 22px;
}

.news-more {
  font-size: 12px;
  color: var(--color-ink);
  letter-spacing: 2px;
}

.news-list {
  background: var(--color-paper);
}

.news-item {
  display: grid;
  grid-template-columns: 130px 100px 1fr;
  padding: 24px 28px;
  border-bottom: 0.5px solid var(--color-line);
  font-size: 14px;
  align-items: center;
  color: var(--color-ink);
}
.news-item:last-child { border-bottom: none; }
.news-item:hover { background: var(--color-paper-3); }

.news-date {
  color: var(--color-ink-3);
  font-size: 13px;
  letter-spacing: 1px;
}

.news-tag {
  display: inline-block;
  padding: 4px 12px;
  font-size: 10px;
  letter-spacing: 2px;
  color: var(--color-paper);
}
.news-tag.tag-info { background: var(--color-ink); }
.news-tag.tag-study { background: var(--color-shu); }
.news-tag.tag-trade { background: var(--color-ink-3); }

/* ========== Footer ========== */

.site-footer {
  background: var(--color-ink);
  color: var(--color-paper);
  padding: 70px 32px 36px;
}

.footer-inner {
  max-width: var(--content-width);
  margin: 0 auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr;
  gap: 50px;
  margin-bottom: 46px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 24px;
}

.footer-brand-mark {
  width: 34px;
  height: 34px;
  background: var(--color-shu);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif-ja);
  font-size: 17px;
  color: var(--color-paper);
}

.footer-brand-name {
  font-family: var(--font-serif-ja);
  font-size: 19px;
  letter-spacing: 4px;
}

.footer-info {
  font-size: 13px;
  line-height: 2.1;
  opacity: 0.75;
}

.footer-col h4 {
  font-size: 11px;
  letter-spacing: 4px;
  opacity: 0.5;
  margin-bottom: 18px;
  font-weight: 400;
}

.footer-col ul { list-style: none; }
.footer-col ul li {
  font-family: var(--font-serif-ja);
  font-size: 14px;
  line-height: 2.4;
  letter-spacing: 1px;
  opacity: 0.85;
}

.footer-cert {
  border-top: 0.5px solid rgba(250, 247, 239, 0.2);
  padding-top: 24px;
  margin-bottom: 24px;
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  opacity: 0.55;
  letter-spacing: 1px;
}

.footer-bottom {
  border-top: 0.5px solid rgba(250, 247, 239, 0.2);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  opacity: 0.5;
  letter-spacing: 1px;
}

/* ========== About Page ========== */

.page-hero {
  background: var(--color-paper);
  padding: 90px 32px 70px;
  border-bottom: 0.5px solid var(--color-line);
}

.page-hero-inner {
  max-width: var(--content-width);
  margin: 0 auto;
}

.page-eyebrow {
  font-size: 11px;
  color: var(--color-shu);
  letter-spacing: 6px;
  margin-bottom: 28px;
}

.page-title {
  font-family: var(--font-serif-ja);
  font-size: 44px;
  color: var(--color-ink);
  letter-spacing: 8px;
  font-weight: 500;
  margin-bottom: 18px;
}

.page-subtitle {
  font-size: 14px;
  color: var(--color-ink-3);
  letter-spacing: 4px;
}

/* ========== Daihyou Aisatsu (代表挨拶) ========== */

.daihyou {
  background: var(--color-paper);
  padding: 80px 32px;
}

.daihyou-inner {
  max-width: 880px;
  margin: 0 auto;
}

.daihyou-text {
  font-family: var(--font-serif-ja);
  font-size: 16px;
  line-height: 2.4;
  color: var(--color-ink);
  letter-spacing: 1.5px;
  margin-bottom: 36px;
}

.daihyou-text p { margin-bottom: 1.6em; }

.daihyou-sign {
  text-align: right;
  font-family: var(--font-serif-ja);
  font-size: 14px;
  line-height: 2;
  color: var(--color-ink);
}

.daihyou-sign .name {
  font-size: 22px;
  letter-spacing: 8px;
  margin-top: 8px;
  display: block;
}

/* ========== Gaiyou Table (会社概要) ========== */

.gaiyou-table {
  background: var(--color-paper);
  width: 100%;
  border-collapse: collapse;
}

.gaiyou-table tr {
  border-bottom: 0.5px solid var(--color-line);
}

.gaiyou-table th {
  font-family: var(--font-serif-ja);
  font-weight: 500;
  text-align: left;
  width: 220px;
  padding: 22px 24px;
  vertical-align: top;
  font-size: 14px;
  color: var(--color-ink);
  letter-spacing: 2px;
  background: var(--color-paper-3);
}

.gaiyou-table td {
  padding: 22px 24px;
  font-size: 14px;
  color: var(--color-ink-2);
  line-height: 1.9;
}

/* ========== Page Content Block ========== */

.content-block {
  padding: 70px 32px 80px;
}

.content-block-inner {
  max-width: 920px;
  margin: 0 auto;
}

.content-h2 {
  font-family: var(--font-serif-ja);
  font-size: 24px;
  color: var(--color-ink);
  letter-spacing: 4px;
  margin-bottom: 28px;
  font-weight: 500;
  padding-bottom: 14px;
  border-bottom: 0.5px solid var(--color-line);
}

.content-h3 {
  font-family: var(--font-serif-ja);
  font-size: 18px;
  color: var(--color-ink);
  letter-spacing: 2px;
  margin: 36px 0 18px;
  font-weight: 500;
}

.content-p {
  font-size: 14px;
  color: var(--color-ink-2);
  line-height: 2.1;
  margin-bottom: 1.4em;
}

.content-ul {
  list-style: none;
  margin: 18px 0 24px;
}

.content-ul li {
  font-size: 14px;
  color: var(--color-ink-2);
  line-height: 2.1;
  padding-left: 22px;
  position: relative;
  margin-bottom: 6px;
}

.content-ul li::before {
  content: '─';
  position: absolute;
  left: 0;
  color: var(--color-shu);
}

/* ========== Category Grid ========== */

.category-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin: 32px 0;
}

.category-item {
  background: var(--color-paper-3);
  padding: 26px 24px;
}

.category-item h4 {
  font-family: var(--font-serif-ja);
  font-size: 16px;
  letter-spacing: 2px;
  margin-bottom: 10px;
  font-weight: 500;
}

.category-item p {
  font-size: 13px;
  color: var(--color-ink-2);
  line-height: 1.9;
}

/* ========== Form ========== */

.form-wrap {
  background: var(--color-paper);
  padding: 50px 60px;
  max-width: 720px;
  margin: 0 auto;
}

.form-tabs {
  display: flex;
  border-bottom: 0.5px solid var(--color-line);
  margin-bottom: 40px;
}

.form-tab {
  flex: 1;
  text-align: center;
  padding: 18px;
  font-family: var(--font-serif-ja);
  font-size: 15px;
  letter-spacing: 3px;
  color: var(--color-ink-3);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
}

.form-tab.active {
  color: var(--color-ink);
  border-bottom-color: var(--color-shu);
}

.form-group {
  margin-bottom: 24px;
}

.form-group label {
  display: block;
  font-size: 12px;
  letter-spacing: 2px;
  color: var(--color-ink);
  margin-bottom: 10px;
  font-weight: 500;
}

.form-group label .req {
  color: var(--color-shu);
  margin-left: 4px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 14px;
  border: 0.5px solid var(--color-line);
  background: var(--color-paper);
  font-family: var(--font-sans-ja);
  font-size: 14px;
  color: var(--color-ink);
  outline: none;
  transition: border-color 0.2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--color-ink);
}

.form-group textarea { min-height: 130px; resize: vertical; }

.form-submit {
  background: var(--color-ink);
  color: var(--color-paper);
  border: none;
  padding: 16px 40px;
  font-family: var(--font-serif-ja);
  font-size: 14px;
  letter-spacing: 4px;
  cursor: pointer;
  transition: background 0.2s;
}
.form-submit:hover { background: var(--color-shu); }

.form-note {
  font-size: 11px;
  color: var(--color-ink-3);
  line-height: 1.8;
  margin-top: 20px;
}

.form-section {
  display: none;
}
.form-section.active { display: block; }

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

@media (max-width: 900px) {
  .header-inner { padding: 14px 20px; flex-wrap: wrap; }
  .nav { gap: 18px; font-size: 12px; }
  .hero { padding: 60px 20px 70px; }
  .hero-title { font-size: 36px; letter-spacing: 4px; }
  .hero-seal { width: 60px; height: 60px; font-size: 11px; }
  .section { padding: 60px 20px 70px; }
  .business-grid { grid-template-columns: 1fr; gap: 16px; }
  .strengths-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-grid { grid-template-columns: 1fr; gap: 36px; }
  .news-item { grid-template-columns: 100px 80px 1fr; padding: 18px 20px; font-size: 13px; }
  .page-title { font-size: 32px; letter-spacing: 4px; }
  .gaiyou-table th { width: 130px; padding: 16px; font-size: 13px; }
  .gaiyou-table td { padding: 16px; font-size: 13px; }
  .daihyou { padding: 50px 20px; }
  .content-block { padding: 50px 20px; }
  .form-wrap { padding: 30px 20px; }
}

@media (max-width: 600px) {
  .lang-switch { padding-left: 0; border-left: none; }
  .hero-title-row { gap: 18px; }
  .hero-title-line { margin-top: 6px; }
  .hero-lead, .hero-buttons { margin-left: 20px; }
  .hero-buttons { flex-direction: column; }
  .footer-cert, .footer-bottom { flex-direction: column; gap: 10px; }
}