/* 神州孟氏官网 — 印玺朱红 × 墨色 */
:root {
  --ms-seal: #c41e3a;
  --ms-seal-deep: #8f1529;
  --ms-ink: #12161c;
  --ms-ink-soft: #2a3140;
  --ms-paper: #eef1f4;
  --ms-gold: #c4a35a;
  --ms-muted: #6b7280;
  --ms-radius: 0.35rem;
  --font-display: "Source Han Serif SC", "Noto Serif SC", "Songti SC", "STSong", "SimSun", serif;
  --font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 4.5rem;
}

body {
  font-family: var(--font-body);
  color: var(--ms-ink);
  background: var(--ms-paper);
  overflow-x: hidden;
}

h1, h2, h3, h4, .display-font, .navbar-brand {
  font-family: var(--font-display);
  letter-spacing: 0.06em;
}

/* —— Navbar —— */
.ms-navbar {
  background: transparent;
  transition: background 0.35s ease, box-shadow 0.35s ease, padding 0.35s ease;
  padding-top: 1rem;
  padding-bottom: 1rem;
}

.ms-navbar.scrolled {
  background: rgba(18, 22, 28, 0.96);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.25);
  padding-top: 0.55rem;
  padding-bottom: 0.55rem;
}

.ms-navbar .nav-link {
  color: rgba(255, 255, 255, 0.82) !important;
  font-size: 0.95rem;
  position: relative;
  padding-inline: 0.85rem !important;
}

.ms-navbar .nav-link::after {
  content: "";
  position: absolute;
  left: 0.85rem;
  right: 0.85rem;
  bottom: 0.2rem;
  height: 2px;
  background: var(--ms-seal);
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

.ms-navbar .nav-link:hover::after,
.ms-navbar .nav-link.active::after {
  transform: scaleX(1);
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.1rem;
  height: 2.1rem;
  border: 2px solid var(--ms-seal);
  color: var(--ms-seal);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  margin-right: 0.55rem;
  line-height: 1;
}

/* —— Hero carousel —— */
.ms-hero {
  position: relative;
  min-height: 100vh;
  background: var(--ms-ink);
}

.ms-hero .carousel,
.ms-hero .carousel-inner,
.ms-hero .carousel-item {
  min-height: 100vh;
}

.hero-slide {
  min-height: 100vh;
  background-size: cover;
  background-position: center;
  display: flex;
  align-items: center;
  position: relative;
}

.hero-slide::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(120deg, rgba(12, 14, 18, 0.88) 0%, rgba(12, 14, 18, 0.55) 55%, rgba(196, 30, 58, 0.28) 100%),
    url("../img/hero-pattern.svg") center / 420px repeat;
  opacity: 1;
}

.hero-slide.slide-a { background-image: linear-gradient(160deg, #1a2030, #0c0e12); }
.hero-slide.slide-b { background-image: linear-gradient(160deg, #1e1520, #0c0e12); }
.hero-slide.slide-c { background-image: linear-gradient(160deg, #15201c, #0c0e12); }

.hero-content {
  position: relative;
  z-index: 2;
  padding-top: 5rem;
  max-width: 720px;
}

.hero-brand {
  font-size: clamp(2.8rem, 8vw, 5.2rem);
  color: #fff;
  font-weight: 700;
  line-height: 1.15;
  margin-bottom: 0.75rem;
  animation: msRise 1s ease both;
}

.hero-slogan {
  color: rgba(255, 255, 255, 0.78);
  font-size: 1.15rem;
  letter-spacing: 0.18em;
  margin-bottom: 1.75rem;
  animation: msRise 1s 0.15s ease both;
}

.hero-motto {
  display: inline-block;
  border-left: 3px solid var(--ms-seal);
  padding-left: 1rem;
  color: var(--ms-gold);
  margin-bottom: 2rem;
  animation: msRise 1s 0.3s ease both;
}

.hero-actions {
  animation: msRise 1s 0.45s ease both;
}

.btn-seal {
  --bs-btn-bg: var(--ms-seal);
  --bs-btn-border-color: var(--ms-seal);
  --bs-btn-hover-bg: var(--ms-seal-deep);
  --bs-btn-hover-border-color: var(--ms-seal-deep);
  --bs-btn-active-bg: var(--ms-seal-deep);
  --bs-btn-active-border-color: var(--ms-seal-deep);
  --bs-btn-color: #fff;
  --bs-btn-hover-color: #fff;
  letter-spacing: 0.12em;
  padding: 0.7rem 1.6rem;
}

.btn-ghost {
  --bs-btn-color: #fff;
  --bs-btn-border-color: rgba(255, 255, 255, 0.45);
  --bs-btn-hover-bg: rgba(255, 255, 255, 0.1);
  --bs-btn-hover-border-color: #fff;
  --bs-btn-hover-color: #fff;
  letter-spacing: 0.12em;
  padding: 0.7rem 1.6rem;
}

.carousel-indicators [data-bs-target] {
  width: 2.2rem;
  height: 3px;
  border-radius: 0;
}

.scroll-hint {
  position: absolute;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
  color: rgba(255, 255, 255, 0.65);
  animation: msBounce 1.8s ease-in-out infinite;
  text-decoration: none;
}

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

@keyframes msBounce {
  0%, 100% { transform: translate(-50%, 0); }
  50% { transform: translate(-50%, 8px); }
}

/* —— Sections —— */
.section {
  padding: 5rem 0;
}

.section-title {
  font-size: clamp(1.75rem, 3vw, 2.35rem);
  margin-bottom: 0.5rem;
}

.section-lead {
  color: var(--ms-muted);
  max-width: 36rem;
  margin-bottom: 2.5rem;
}

.section-ink {
  background: var(--ms-ink);
  color: #fff;
}

.section-ink .section-lead {
  color: rgba(255, 255, 255, 0.65);
}

.seal-line {
  width: 3rem;
  height: 3px;
  background: var(--ms-seal);
  margin-bottom: 1rem;
}

/* —— Service tiles (非卡片堆叠：轻分隔) —— */
.service-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: rgba(0, 0, 0, 0.08);
  border: 1px solid rgba(0, 0, 0, 0.08);
}

.service-item {
  background: #fff;
  padding: 1.75rem 1.25rem;
  text-align: center;
  text-decoration: none;
  color: inherit;
  transition: background 0.3s ease, color 0.3s ease, transform 0.3s ease;
}

.service-item:hover {
  background: var(--ms-ink);
  color: #fff;
  transform: translateY(-2px);
}

.service-item .bi {
  font-size: 1.75rem;
  color: var(--ms-seal);
  transition: color 0.3s ease;
  display: block;
  margin-bottom: 0.75rem;
}

.service-item:hover .bi {
  color: var(--ms-gold);
}

.service-item h3 {
  font-size: 1.05rem;
  margin-bottom: 0.35rem;
}

.service-item p {
  font-size: 0.85rem;
  color: var(--ms-muted);
  margin: 0;
  transition: color 0.3s ease;
}

.service-item:hover p {
  color: rgba(255, 255, 255, 0.65);
}

@media (max-width: 991px) {
  .service-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 575px) {
  .service-grid { grid-template-columns: 1fr; }
}

/* —— Reveal on scroll (配合 Bootstrap .fade) —— */
.reveal.fade:not(.show) {
  opacity: 0;
  transform: translateY(24px);
}

.reveal.fade.show {
  opacity: 1;
  transform: none;
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal-delay-1 { transition-delay: 0.1s !important; }
.reveal-delay-2 { transition-delay: 0.2s !important; }
.reveal-delay-3 { transition-delay: 0.3s !important; }

/* —— Fund —— */
.fund-panel {
  background: #fff;
  border-left: 4px solid var(--ms-seal);
  padding: 2rem;
}

.progress.ms-progress {
  height: 0.65rem;
  border-radius: 0;
  background: #e5e7eb;
}

.progress.ms-progress .progress-bar {
  background: linear-gradient(90deg, var(--ms-seal-deep), var(--ms-seal));
}

.stat-num {
  font-family: var(--font-display);
  font-size: 2rem;
  color: var(--ms-seal);
  font-weight: 700;
}

/* —— Notice / forum —— */
.list-row {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  padding: 1rem 0;
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
  text-decoration: none;
  color: inherit;
  transition: padding-left 0.25s ease, color 0.25s ease;
}

.list-row:hover {
  padding-left: 0.5rem;
  color: var(--ms-seal);
}

.list-row .tag {
  flex-shrink: 0;
  font-size: 0.75rem;
  padding: 0.15rem 0.5rem;
  background: rgba(196, 30, 58, 0.1);
  color: var(--ms-seal);
  letter-spacing: 0.08em;
}

.list-row .meta {
  margin-left: auto;
  font-size: 0.8rem;
  color: var(--ms-muted);
  white-space: nowrap;
}

.nav-tabs.ms-tabs {
  border-bottom: 2px solid rgba(0, 0, 0, 0.08);
}

.nav-tabs.ms-tabs .nav-link {
  border: none;
  color: var(--ms-muted);
  border-radius: 0;
  padding: 0.75rem 1.25rem;
  letter-spacing: 0.08em;
}

.nav-tabs.ms-tabs .nav-link.active {
  color: var(--ms-seal);
  background: transparent;
  box-shadow: inset 0 -2px 0 var(--ms-seal);
}

/* —— Culture —— */
.culture-tile {
  position: relative;
  min-height: 220px;
  background: var(--ms-ink-soft);
  overflow: hidden;
  display: flex;
  align-items: flex-end;
  padding: 1.5rem;
  color: #fff;
  text-decoration: none;
  transition: transform 0.4s ease;
}

.culture-tile::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(to top, rgba(0, 0, 0, 0.75), transparent 55%),
    url("../img/hero-pattern.svg") center / 280px repeat;
  opacity: 0.9;
  transition: transform 0.6s ease;
}

.culture-tile:hover {
  transform: translateY(-4px);
  color: #fff;
}

.culture-tile:hover::before {
  transform: scale(1.08);
}

.culture-tile > * {
  position: relative;
  z-index: 1;
}

.culture-tile.t1 { background: linear-gradient(135deg, #2a1a1e, #12161c); }
.culture-tile.t2 { background: linear-gradient(135deg, #1a2430, #12161c); }
.culture-tile.t3 { background: linear-gradient(135deg, #1a2a22, #12161c); }

/* —— Accordion —— */
.accordion.ms-accordion .accordion-button {
  font-family: var(--font-display);
  letter-spacing: 0.06em;
  background: #fff;
  box-shadow: none !important;
}

.accordion.ms-accordion .accordion-button:not(.collapsed) {
  color: var(--ms-seal);
  background: #fff;
}

.accordion.ms-accordion .accordion-item {
  border: 1px solid rgba(0, 0, 0, 0.08);
  margin-bottom: 0.5rem;
  border-radius: 0 !important;
  overflow: hidden;
}

.accordion.ms-accordion .accordion-button::after {
  filter: none;
}

/* —— Footer —— */
.ms-footer {
  background: #0a0c10;
  color: rgba(255, 255, 255, 0.7);
  padding: 3.5rem 0 2rem;
  font-size: 0.9rem;
}

.ms-footer a {
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
}

.ms-footer a:hover {
  color: #fff;
}

.ms-footer .brand-foot {
  color: #fff;
  font-size: 1.5rem;
  margin-bottom: 0.75rem;
}

/* —— Toast / modal accents —— */
.toast.ms-toast {
  border-left: 4px solid var(--ms-seal);
  border-radius: 0;
}

.modal-content.ms-modal {
  border-radius: 0;
  border: none;
}

.modal-header.ms-modal-header {
  background: var(--ms-ink);
  color: #fff;
  border: none;
}

.offcanvas.ms-offcanvas {
  background: var(--ms-ink);
  color: #fff;
}

/* Spinner overlay (欢迎加载) */
.ms-loader {
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: var(--ms-ink);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: #fff;
  transition: opacity 0.5s ease, visibility 0.5s ease;
}

.ms-loader.hide {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.ms-loader .brand-mark {
  width: 3rem;
  height: 3rem;
  font-size: 1.6rem;
  margin-right: 0;
  margin-bottom: 1.25rem;
  animation: msPulse 1.2s ease-in-out infinite;
}

@keyframes msPulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.08); opacity: 0.75; }
}

.back-top {
  position: fixed;
  right: 1.25rem;
  bottom: 1.25rem;
  z-index: 1030;
  width: 2.75rem;
  height: 2.75rem;
  border: none;
  background: var(--ms-seal);
  color: #fff;
  display: none;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.back-top.show {
  display: flex;
  opacity: 1;
}