/* ================================================================
   今日同人库 · 光之卷轴 · Doujin Scroll Design System
   Warm washi paper / vermilion seal / gold thread editorial language
   ================================================================ */

:root {
  --paper: #F4EEDF;
  --paper-deep: #E9DFCA;
  --card: #FDFAF2;
  --ink: #282017;
  --ink-soft: #3E3528;
  --muted: #7A6D5B;
  --vermilion: #D6441F;
  --vermilion-deep: #B03010;
  --vermilion-mist: rgba(214, 68, 31, 0.15);
  --gold: #C19B4C;
  --indigo: #2C4664;
  --line: rgba(40, 32, 23, 0.13);
  --font-cjk: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", system-ui, -apple-system, sans-serif;
  --shadow-xs: 0 2px 0 rgba(40, 32, 23, 0.04);
  --shadow-sm: 0 6px 18px rgba(64, 48, 28, 0.07);
  --shadow-md: 0 16px 34px rgba(64, 48, 28, 0.12);
  --shadow-lg: 0 26px 62px rgba(64, 48, 28, 0.18);
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ---------- base reset ---------- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: var(--font-cjk);
  font-weight: 400;
  line-height: 1.75;
  background-color: var(--paper);
  color: var(--ink);
  background-image:
    radial-gradient(rgba(44, 70, 100, 0.045) 1px, transparent 1px),
    linear-gradient(0deg, transparent 0 calc(100% - 1px), rgba(44, 70, 100, 0.035) calc(100% - 1px));
  background-size: 20px 20px, 100% 56px;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
::selection {
  background: var(--vermilion);
  color: var(--card);
}
img {
  display: block;
}
a {
  color: inherit;
}

/* ---------- core container / section ---------- */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
.section {
  position: relative;
  padding: clamp(70px, 9vw, 120px) 0;
  overflow: hidden;
}
.section::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 4px;
  background:
    linear-gradient(90deg, var(--vermilion) 0, var(--vermilion) 60px, var(--gold) 60px, var(--gold) 76px, transparent 76px);
  opacity: 0.35;
  pointer-events: none;
}
.section::after {
  content: "";
  position: absolute;
  top: 90px;
  right: -40px;
  width: 120px;
  height: 120px;
  background: radial-gradient(circle, var(--vermilion-mist) 1.2px, transparent 1.5px) 0 0 / 10px 10px;
  opacity: 0.5;
  transform: rotate(12deg);
  pointer-events: none;
}
.section:nth-child(even) {
  background: var(--paper-deep);
  border-top: 1px solid rgba(214, 68, 31, 0.12);
  border-bottom: 1px solid rgba(214, 68, 31, 0.12);
}
.section:nth-child(even)::after {
  right: auto;
  left: -50px;
}

/* ---------- fixed header ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(253, 250, 242, 0.88);
  -webkit-backdrop-filter: blur(16px) saturate(160%);
  backdrop-filter: blur(16px) saturate(160%);
  border-bottom: 1px solid rgba(40, 32, 23, 0.12);
  box-shadow: 0 4px 24px rgba(64, 48, 28, 0.04);
  transition: background 0.35s;
}
.site-header::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 84px;
  height: 3px;
  background: linear-gradient(90deg, var(--vermilion), var(--gold));
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 74px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* logo with hanko-style seal */
.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  font-size: 1.18rem;
  letter-spacing: 0.08em;
  text-decoration: none;
  color: var(--ink);
  white-space: nowrap;
}
.logo-icon {
  position: relative;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  font-weight: 800;
  color: #fff;
  background:
    radial-gradient(circle at 32% 28%, rgba(255, 220, 160, 0.45), transparent 32%),
    linear-gradient(160deg, #E95C31, var(--vermilion-deep));
  box-shadow:
    inset 0 0 0 3px rgba(255, 255, 255, 0.18),
    0 8px 16px var(--vermilion-mist);
}
.logo-icon::after {
  content: "";
  position: absolute;
  inset: -7px;
  border: 1px dashed var(--vermilion);
  border-radius: 50%;
  opacity: 0.6;
}

/* nav */
.main-nav {
  display: flex;
  align-items: center;
  gap: 30px;
  list-style: none;
}
.main-nav a {
  position: relative;
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--ink-soft);
  padding: 8px 0;
  transition: color 0.25s;
}
.main-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 2px;
  width: 0;
  height: 2px;
  background: var(--vermilion);
  transition: width 0.35s var(--ease-out);
}
.main-nav a:hover,
.main-nav a:focus {
  color: var(--vermilion);
}
.main-nav a:hover::after {
  width: 100%;
}
.nav-cta {
  padding: 10px 24px;
  border-radius: 0 14px 0 14px;
  color: #fff !important;
  font-weight: 600 !important;
  background: var(--vermilion);
  box-shadow: 5px 5px 0 var(--ink);
  letter-spacing: 0.08em;
  transition: box-shadow 0.25s, transform 0.25s var(--ease-spring);
}
.nav-cta:hover {
  color: #fff !important;
  transform: translate(-2px, -2px);
  box-shadow: 8px 8px 0 var(--ink);
}
.nav-cta::after {
  display: none;
}

/* hamburger */
.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 0 10px 0 10px;
  background: var(--card);
  color: var(--ink);
  font-size: 1rem;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: border-color 0.25s;
}
.menu-toggle:hover {
  border-color: var(--vermilion);
}

/* ---------- hero ---------- */
.hero {
  min-height: 100svh;
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(300px, 0.85fr);
  align-items: center;
  gap: clamp(30px, 6vw, 90px);
  padding: clamp(130px, 14vw, 170px) 0 clamp(60px, 8vw, 110px);
  position: relative;
}
.hero::before {
  content: "";
  position: absolute;
  z-index: 0;
  top: 16%;
  right: clamp(20px, 6vw, 90px);
  width: clamp(240px, 34vw, 430px);
  height: clamp(240px, 34vw, 430px);
  border-radius: 50%;
  background:
    radial-gradient(circle, rgba(253, 250, 242, 0.6) 0 16%, transparent 17%),
    rgba(214, 68, 31, 0.1);
  box-shadow:
    inset 0 0 0 1px rgba(214, 68, 31, 0.22),
    0 0 0 4px rgba(214, 68, 31, 0.04);
  pointer-events: none;
}
.hero-content {
  position: relative;
  z-index: 1;
  max-width: 720px;
}
.hero-content::before {
  content: "";
  position: absolute;
  left: -22px;
  top: 10px;
  bottom: 20px;
  width: 3px;
  background: linear-gradient(var(--vermilion) 0 40%, var(--gold) 40% 55%, transparent 55%);
  opacity: 0.55;
}
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.28em;
  padding: 9px 18px 7px;
  border-radius: 0 18px 0 18px;
  margin-bottom: 24px;
  color: var(--vermilion);
  background: rgba(253, 250, 242, 0.45);
  border: 1px solid var(--vermilion);
  border-bottom-width: 3px;
  box-shadow: 5px 5px 0 var(--vermilion-mist);
  transform: rotate(-1deg);
  transition: transform 0.3s;
}
.hero-exebrow:hover {
  transform: rotate(0deg);
}
.hero h1 {
  font-size: clamp(2.6rem, 6.5vw, 4.7rem);
  line-height: 1.12;
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin-bottom: 22px;
}
.hero p {
  font-size: 1.08rem;
  color: var(--muted);
  max-width: 560px;
  margin-bottom: 36px;
}
.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

/* hero media frame */
.hero-image {
  position: relative;
  z-index: 1;
  border-radius: 4px;
  transform: rotate(1.4deg) translateY(-4px);
  background: var(--paper-deep);
  box-shadow: var(--shadow-lg);
  transition: transform 0.6s var(--ease-out);
}
.hero-image:hover {
  transform: rotate(0deg) translateY(0);
}
.hero-image::before {
  content: "";
  position: absolute;
  z-index: 3;
  top: -13px;
  right: -13px;
  width: 52px;
  height: 52px;
  border-top: 3px solid var(--vermilion);
  border-right: 3px solid var(--vermilion);
  border-radius: 0 8px 0 0;
  pointer-events: none;
}
.hero-image::after {
  content: "";
  position: absolute;
  z-index: 3;
  bottom: -13px;
  left: -13px;
  width: 52px;
  height: 52px;
  border-bottom: 3px solid var(--indigo);
  border-left: 3px solid var(--indigo);
  border-radius: 0 0 0 8px;
  pointer-events: none;
}
.hero-image img {
  width: 100%;
  height: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  border-radius: 4px;
  filter: saturate(0.88) contrast(1.04);
  transition: filter 0.5s;
}
.hero-image:hover img {
  filter: saturate(1) contrast(1);
}

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 14px 30px;
  border-radius: 0 16px 0 16px;
  font-weight: 700;
  font-size: 0.96rem;
  letter-spacing: 0.12em;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: transform 0.25s var(--ease-spring), box-shadow 0.25s var(--ease-out), background 0.25s, color 0.25s;
}
.btn-primary {
  color: #fff;
  background: var(--vermilion);
  box-shadow: 7px 7px 0 var(--ink);
}
.btn-primary:hover {
  transform: translate(-2px, -2px);
  box-shadow: 11px 11px 0 var(--ink);
  background: var(--vermilion-deep);
}
.btn-outline {
  background: transparent;
  color: var(--indigo);
  border: 2px solid var(--indigo);
  box-shadow: 5px 5px 0 rgba(44, 70, 100, 0.12);
}
.btn-outline:hover {
  background: var(--indigo);
  color: var(--paper);
  transform: translate(-2px, -2px);
  box-shadow: 8px 8px 0 rgba(44, 70, 100, 0.18);
}

/* ---------- section label / title ---------- */
.section-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 0.74rem;
  font-weight: 800;
  letter-spacing: 0.26em;
  color: var(--vermilion);
  margin-bottom: 18px;
}
.section-label::before {
  content: "";
  display: inline-block;
  width: 32px;
  height: 2px;
  background: linear-gradient(90deg, var(--vermilion), var(--gold));
}
.section-label::after {
  content: "";
  width: 8px;
  height: 8px;
  background: var(--vermilion);
  border-radius: 0 2px 0 2px;
  transform: rotate(45deg);
}
.section-title {
  position: relative;
  font-size: clamp(2rem, 4.6vw, 3.4rem);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: 0.04em;
  color: var(--ink);
  margin-bottom: 18px;
}
.section-title::before {
  content: "";
  display: block;
  width: 54px;
  height: 3px;
  margin-bottom: 18px;
  background:
    linear-gradient(var(--vermilion) 0 0) 0 0 / 54px 1px no-repeat,
    linear-gradient(90deg, var(--vermilion), var(--gold)) 0 2px / 42px 1px no-repeat;
}
.section-desc {
  font-size: 1.05rem;
  color: var(--muted);
  max-width: 640px;
  margin-bottom: 44px;
}

/* ---------- cards grid ---------- */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 24px;
}
.category-card {
  position: relative;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 3px;
  padding: 38px 30px 36px;
  box-shadow: var(--shadow-xs);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.4s var(--ease-out), box-shadow 0.4s var(--ease-out), border-color 0.3s;
}
.category-card::before {
  content: "";
  position: absolute;
  z-index: 1;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--vermilion), var(--gold));
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.45s var(--ease-out);
}
.category-card::after {
  content: "";
  position: absolute;
  right: 16px;
  bottom: 18px;
  width: 24px;
  height: 24px;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23d6441f' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M5 12h14M12 5l7 7-7 7'/%3E%3C/svg%3E") center / 18px no-repeat;
  opacity: 0;
  transform: translateX(-8px);
  transition: opacity 0.3s, transform 0.3s var(--ease-out);
}
.category-card:hover {
  transform: translateY(-7px) rotate(-0.3deg);
  border-color: rgba(214, 68, 31, 0.32);
  box-shadow: var(--shadow-md);
}
.category-card:hover::before {
  transform: scaleX(1);
}
.category-card:hover::after {
  opacity: 1;
  transform: translateX(0);
}
.card-icon {
  position: relative;
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  color: #fff;
  background: linear-gradient(155deg, #EA6339, var(--vermilion-deep));
  border-radius: 2px 18px 2px 18px;
  margin-bottom: 20px;
  box-shadow: 0 10px 22px var(--vermilion-mist);
}
.card-icon::after {
  content: "";
  position: absolute;
  inset: -7px;
  border: 1px dashed rgba(214, 68, 31, 0.4);
  border-radius: 3px 22px 3px 22px;
}
.card-link {
  font-weight: 700;
  font-size: 0.84rem;
  letter-spacing: 0.1em;
  text-decoration: none;
  color: var(--vermilion);
  align-self: flex-start;
  margin-top: auto;
  padding-top: 22px;
  border-bottom: 2px solid rgba(214, 68, 31, 0.22);
  transition: border-color 0.3s;
}
.category-card:hover .card-link {
  border-bottom-color: var(--vermilion);
}

/* ---------- feature block ---------- */
.feature-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(36px, 7vw, 100px);
  align-items: center;
}
.feature-image {
  position: relative;
  border-radius: 3px;
  padding: 12px;
  background: var(--paper-deep);
  box-shadow: var(--shadow-md);
  transition: transform 0.5s var(--ease-out);
}
.feature-image img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: 2px;
}
.feature-image::before {
  content: "";
  position: absolute;
  z-index: -1;
  left: -14px;
  bottom: -14px;
  width: 100%;
  height: 100%;
  border: 2px solid var(--vermilion);
  border-radius: 2px;
  transform: translate(0, 0);
  transition: transform 0.45s var(--ease-out);
}
.feature-block:hover .feature-image::before {
  transform: translate(6px, -6px);
}
.feature-text .section-title {
  margin-top: 0;
}
.feature-text p {
  color: var(--muted);
  margin-bottom: 28px;
}
.feature-list {
  list-style: none;
}
.feature-list li {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 9px 0;
  color: var(--ink);
  font-weight: 500;
}
.feature-list li::before {
  content: "✓";
  flex: 0 0 auto;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  font-weight: 900;
  color: #fff;
  background: var(--vermilion);
  box-shadow: 0 4px 8px var(--vermilion-mist);
}

/* ---------- stats ---------- */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.stat-item {
  position: relative;
  background: var(--card);
  padding: 40px 22px 34px;
  text-align: center;
  border: 1px solid var(--line);
  border-top: 5px solid var(--gold);
  border-radius: 3px 3px 0 0;
  box-shadow: var(--shadow-xs);
  transition: transform 0.35s var(--ease-spring), box-shadow 0.35s var(--ease-out);
}
.stat-item::after {
  content: "";
  position: absolute;
  top: 16px;
  bottom: 16px;
  right: -12px;
  width: 1px;
  background: linear-gradient(var(--vermilion) 0 40%, transparent 40%);
  opacity: 0.5;
}
.stat-item:hover {
  transform: translateY(-6px) rotate(-0.4deg);
  box-shadow: var(--shadow-sm);
}
.stat-number {
  display: block;
  font-size: clamp(2.1rem, 4.5vw, 3.6rem);
  font-weight: 900;
  line-height: 1;
  color: var(--ink);
  letter-spacing: -0.02em;
}
.stat-label {
  display: inline-block;
  margin-top: 12px;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  color: var(--vermilion);
}

/* ---------- content wall ---------- */
.content-wall {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 22px;
}
.content-wall-item {
  position: relative;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 4px;
  overflow: hidden;
  transition: transform 0.4s var(--ease-out), box-shadow 0.4s var(--ease-out), border-color 0.3s;
}
.content-wall-item:hover {
  transform: translateY(-6px);
  border-color: rgba(193, 155, 76, 0.6);
  box-shadow: var(--shadow-md);
}
.content-wall-item img {
  width: 100%;
  height: 210px;
  object-fit: cover;
  transition: transform 0.6s var(--ease-out), filter 0.4s;
}
.content-wall-item::before {
  content: "";
  position: absolute;
  z-index: 2;
  top: 14px;
  right: 14px;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background:
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23d6441f' stroke-width='2.5' stroke-linecap='round'%3E%3Cpath d='M12 5v14M5 12h14'/%3E%3C/svg%3E") center / 14px no-repeat,
    rgba(253, 250, 242, 0.94);
  box-shadow: 0 4px 12px rgba(40, 32, 23, 0.12);
  opacity: 0;
  transform: scale(0.7);
  transition: opacity 0.3s, transform 0.35s var(--ease-spring);
}
.content-wall-item:hover img {
  transform: scale(1.06);
  filter: contrast(1.05) saturate(1.04);
}
.content-wall-item:hover::before {
  opacity: 1;
  transform: scale(1);
}
.content-wall-body {
  padding: 20px 22px 22px;
  border-top: 1px solid var(--line);
}

/* ---------- FAQ ---------- */
.faq-list {
  max-width: 820px;
  margin: 0 auto;
}
.faq-item {
  background: var(--card);
  border: 1px solid var(--line);
  border-left: 5px solid var(--gold);
  border-radius: 0 14px 0 14px;
  margin-bottom: 12px;
  overflow: hidden;
  cursor: pointer;
  transition: border-color 0.3s, box-shadow 0.3s var(--ease-out);
}
.faq-item:hover {
  border-left-color: var(--vermilion);
  box-shadow: var(--shadow-xs);
}
.faq-item.open {
  border-left-color: var(--vermilion);
  box-shadow: var(--shadow-sm);
}
.faq-item .faq-question {
  padding: 18px 22px;
  font-weight: 700;
  font-size: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 18px;
  color: var(--ink);
  transition: color 0.25s;
}
.faq-item.open .faq-question {
  color: var(--vermilion);
}
.faq-question::after {
  content: "+";
  flex: 0 0 auto;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  font-weight: 400;
  color: var(--vermilion);
  border: 1px solid var(--vermilion-mist);
  border-radius: 50%;
  transition: transform 0.35s var(--ease-out), color 0.25s, background 0.25s;
}
.faq-item.open .faq-question::after {
  transform: rotate(135deg);
  color: #fff;
  background: var(--vermilion);
}
.faq-item .faq-answer {
  color: var(--muted);
  padding: 0 22px 20px;
  display: none;
  font-size: 0.96rem;
  opacity: 0;
  transform: translateY(-6px);
  transition: opacity 0.3s, transform 0.3s;
}
.faq-item.open .faq-answer {
  display: block;
  opacity: 1;
  transform: translateY(0);
}

/* ---------- CTA banner ---------- */
.cta-banner {
  position: relative;
  padding: 88px 32px;
  text-align: center;
  border-radius: 4px;
  color: #fff;
  background:
    radial-gradient(circle at 18% 20%, rgba(255, 255, 255, 0.34) 0 10%, transparent 11%),
    radial-gradient(circle at 80% 70%, rgba(255, 226, 153, 0.25) 0 18%, transparent 19%),
    linear-gradient(125deg, var(--vermilion-deep) 0%, var(--vermilion) 46%, #D86A3F 100%);
  background-blend-mode: overlay, normal, normal;
  box-shadow: 0 24px 54px rgba(176, 48, 16, 0.26);
  overflow: hidden;
}
.cta-banner::before {
  content: "今";
  position: absolute;
  top: -18px;
  right: 30px;
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: var(--card);
  color: var(--vermilion);
  font-size: 1.7rem;
  font-weight: 900;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 5px 5px 0 rgba(253, 250, 242, 0.3);
}
.cta-banner h2 {
  color: #fff;
  font-size: clamp(2rem, 4.5vw, 3.4rem);
  font-weight: 900;
  letter-spacing: 0.06em;
  margin-bottom: 16px;
}
.cta-banner .btn-primary {
  background: var(--card);
  color: var(--vermilion);
  box-shadow: 7px 7px 0 rgba(40, 32, 23, 0.18);
  border-radius: 0 16px 0 16px;
}
.cta-banner .btn-primary:hover {
  background: var(--ink);
  color: var(--card);
  transform: translate(-2px, -2px);
  box-shadow: 10px 10px 0 rgba(40, 32, 23, 0.25);
}

/* ---------- footer ---------- */
.site-footer {
  position: relative;
  background: var(--paper-deep);
  border-top: 2px solid var(--vermilion);
  padding: 72px 0 30px;
  box-shadow: inset 0 8px 20px rgba(64, 48, 28, 0.04);
}
.site-footer::before {
  content: "";
  position: absolute;
  left: 0;
  top: -5px;
  width: 180px;
  height: 3px;
  background: linear-gradient(90deg, var(--gold), transparent);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 44px;
}
.footer-brand {
  font-weight: 800;
  font-size: 1.2rem;
  letter-spacing: 0.06em;
  margin-bottom: 12px;
  color: var(--ink);
}
.footer-col h4 {
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.24em;
  color: var(--vermilion);
  margin-bottom: 18px;
}
.footer-col a {
  display: inline-block;
  text-decoration: none;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 2.1;
  transition: color 0.2s, transform 0.25s;
}
.footer-col a:hover {
  color: var(--vermilion);
  transform: translateX(4px);
}
.footer-bottom {
  border-top: 1px solid var(--line);
  margin-top: 48px;
  padding-top: 22px;
  text-align: center;
  font-size: 0.86rem;
  letter-spacing: 0.08em;
  color: var(--muted);
}

/* ---------- utilities ---------- */
.text-accent {
  color: var(--vermilion);
}
.text-center {
  text-align: center;
}
.seo-description {
  max-width: 660px;
  margin: 0 auto 52px;
  color: var(--muted);
  font-size: 1.02rem;
  line-height: 2;
}
.mt-0 {
  margin-top: 0 !important;
}
.mb-0 {
  margin-bottom: 0 !important;
}

/* ---------- responsive 768 ---------- */
@media (max-width: 768px) {
  .header-inner {
    padding: 0 18px;
  }
  .menu-toggle {
    display: flex;
  }
  .main-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    background: var(--card);
    border-bottom: 1px solid var(--gold);
    padding: 22px 24px 28px;
    box-shadow: var(--shadow-md);
    border-radius: 0 0 18px 18px;
    animation: navDrop 0.35s var(--ease-out);
  }
  @keyframes navDrop {
    from {
      opacity: 0;
      transform: translateY(-8px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }
  .main-nav.open {
    display: flex;
  }
  .main-nav a {
    width: 100%;
    padding: 12px 4px;
    border-bottom: 1px dashed var(--line);
  }
  .nav-cta {
    width: 100%;
    text-align: center;
    margin-top: 12px;
    border-bottom: none;
  }
  .container {
    padding: 0 20px;
  }
  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    padding-top: 120px;
    gap: 40px;
  }
  .hero-content::before {
    left: -14px;
  }
  .hero-image {
    max-width: 440px;
    transform: rotate(0.5deg);
  }
  .feature-block {
    grid-template-columns: 1fr;
    gap: 60px;
  }
  .feature-image {
    max-width: 520px;
  }
  .stats-bar {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
  .stat-item::after {
    display: none;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
  }
  .card-icon,
  .content-wall-item {
    max-width: none;
  }
  .cta-banner::before {
    right: 16px;
    width: 54px;
    height: 54px;
    font-size: 1.2rem;
  }
}

/* ---------- responsive 480 ---------- */
@media (max-width: 480px) {
  .cards-grid,
  .content-wall,
  .stats-bar {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .hero-buttons {
    flex-direction: column;
    align-items: stretch;
  }
  .hero-buttons .btn {
    width: 100%;
  }
  .hero-eyebrow {
    letter-spacing: 0.18em;
    font-size: 0.72rem;
  }
  .hero-image {
    transform: none;
  }
  .hero-image::before,
  .hero-image::after {
    width: 36px;
    height: 36px;
  }
  .cta-banner {
    padding: 72px 20px;
  }
  .section {
    padding: 64px 0;
  }
  .section-title {
    font-size: 1.75rem;
  }
  .logo-icon {
    width: 34px;
    height: 34px;
  }
  .logo {
    font-size: 1rem;
    gap: 9px;
  }
}