/* ============================================================
   爱洣库 imiku · 基础公共样式
   全站通用：变量、重置、导航、页脚、Hero 基础、通用组件
   ============================================================ */

/* ============================================================
   爱洣库 imiku · 未来科技风主题样式
   主色 #66ccff（初音蓝） / 点缀 #ff77aa（初音粉） / #39c5bb 青绿
   ============================================================ */

:root {
  --miku-blue: #66ccff;
  --miku-pink: #ff77aa;
  --miku-teal: #39c5bb;
  --bg-deep: #050a14;
  --bg-card: rgba(10, 18, 32, 0.72);
  --border-blue: rgba(102, 204, 255, 0.18);
  --text-main: rgba(200, 230, 255, 0.92);
  --text-dim: rgba(150, 190, 220, 0.6);
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 76px;
}

body {
  background-color: var(--bg-deep);
  color: var(--text-main);
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", -apple-system,
    "Segoe UI", Roboto, sans-serif;
  overflow-x: hidden;
  /* 由 main.js 在公共部件加载完成后淡入，避免样式闪烁 */
  opacity: 0;
  transition: opacity 0.4s ease;
}

body.imiku-ready {
  opacity: 1;
}

::selection {
  background: rgba(102, 204, 255, 0.35);
  color: #fff;
}

::-webkit-scrollbar {
  width: 10px;
}
::-webkit-scrollbar-track {
  background: var(--bg-deep);
}
::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--miku-blue), var(--miku-pink));
  border-radius: 8px;
}

a {
  text-decoration: none;
}

.mono {
  font-family: "SFMono-Regular", Consolas, "Courier New", monospace;
}
.miku-gradient-text {
  background: linear-gradient(100deg, #66ccff 10%, #39c5bb 45%, #ff77aa 90%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-weight: 800;
}

.miku-outline-text {
  color: transparent;
  -webkit-text-stroke: 1px rgba(102, 204, 255, 0.35);
  font-weight: 900;
  letter-spacing: 0.2em;
}

.glow-blue {
  text-shadow: 0 0 12px rgba(102, 204, 255, 0.8), 0 0 42px rgba(102, 204, 255, 0.4);
}

.glow-pink {
  text-shadow: 0 0 12px rgba(255, 119, 170, 0.8), 0 0 42px rgba(255, 119, 170, 0.4);
}
.scanlines::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background: repeating-linear-gradient(
    to bottom,
    transparent 0px,
    transparent 3px,
    rgba(102, 204, 255, 0.018) 3px,
    rgba(102, 204, 255, 0.018) 4px
  );
}
/* ---------- 漂浮粒子（由 main.js 生成） ---------- */

#particles {
  position: fixed;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
}

.float-particle {
  position: absolute;
  bottom: -4rem;
  font-family: Consolas, monospace;
  user-select: none;
  animation: float-up linear infinite;
}

@keyframes float-up {
  0% { transform: translateY(0) rotate(0deg); opacity: 0; }
  10% { opacity: 0.9; }
  90% { opacity: 0.5; }
  100% { transform: translateY(-110vh) rotate(28deg); opacity: 0; }
}
/* ---------- 均衡器 ---------- */

.eq-bar {
  transform-origin: bottom;
  animation: eq-bounce 1.1s ease-in-out infinite;
  width: 6px;
  border-radius: 6px;
}

@keyframes eq-bounce {
  0%, 100% { transform: scaleY(0.25); }
  50% { transform: scaleY(1); }
}
/* ---------- 旋转光环 / 光斑 ---------- */

@keyframes spin-slow {
  to { transform: rotate(360deg); }
}

.spin-slower { animation: spin-slow 24s linear infinite; }
.spin-reverse { animation: spin-slow 36s linear infinite reverse; }

@keyframes orb-pulse {
  0%, 100% { opacity: 0.5; transform: scale(1); }
  50% { opacity: 0.85; transform: scale(1.12); }
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(110px);
  animation: orb-pulse 6s ease-in-out infinite;
  pointer-events: none;
}
/* ---------- 霓虹卡片 ---------- */

.neon-card {
  background: var(--bg-card);
  border: 1px solid var(--border-blue);
  border-radius: 0.9rem;
  backdrop-filter: blur(8px);
  transition: transform 0.35s ease, box-shadow 0.35s ease, border-color 0.35s ease;
}

.neon-card:hover {
  transform: translateY(-6px);
  border-color: rgba(102, 204, 255, 0.65);
  box-shadow:
    0 0 0 1px rgba(102, 204, 255, 0.35),
    0 8px 32px rgba(102, 204, 255, 0.18),
    0 0 64px rgba(255, 119, 170, 0.08);
}
/* ---------- 标签芯片 ---------- */

.tag-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  border: 1px solid rgba(102, 204, 255, 0.35);
  background: rgba(102, 204, 255, 0.07);
  border-radius: 999px;
  padding: 0.2rem 0.65rem;
  font-family: Consolas, monospace;
  font-size: 0.75rem;
  color: rgba(190, 225, 250, 0.8);
  transition: all 0.3s ease;
}

.tag-chip:hover {
  border-color: rgba(255, 119, 170, 0.6);
  background: rgba(255, 119, 170, 0.1);
}
/* ---------- 光标闪烁 ---------- */

.typing-caret {
  display: inline-block;
  width: 8px;
  height: 1.2em;
  background: var(--miku-blue);
  vertical-align: text-bottom;
  animation: caret-blink 1s step-end infinite;
}

@keyframes caret-blink {
  0%, 49% { opacity: 1; }
  50%, 100% { opacity: 0; }
}
/* ============================================================
   导航栏
   ============================================================ */

.imiku-navbar {
  background: rgba(5, 10, 20, 0.72);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(102, 204, 255, 0.15);
  transition: background 0.3s ease, box-shadow 0.3s ease;
}

.imiku-navbar.nav-scrolled {
  background: rgba(5, 10, 20, 0.92);
  box-shadow: 0 4px 24px rgba(102, 204, 255, 0.12);
}

.imiku-toggler {
  border-color: rgba(102, 204, 255, 0.4);
}
.imiku-toggler:focus {
  box-shadow: 0 0 0 0.2rem rgba(102, 204, 255, 0.25);
}
.imiku-toggler .navbar-toggler-icon {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='%2366ccff' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

.imiku-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.brand-icon {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 1px solid rgba(102, 204, 255, 0.5);
  border-radius: 0.5rem;
  background: rgba(102, 204, 255, 0.08);
  box-shadow: 0 0 16px rgba(102, 204, 255, 0.35);
}

.brand-dot {
  position: absolute;
  top: -4px;
  right: -4px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--miku-pink);
  box-shadow: 0 0 8px rgba(255, 119, 170, 0.9);
}

.brand-text {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.25em;
  color: var(--text-main);
}

.brand-en {
  margin-left: 0.4rem;
  font-family: Consolas, monospace;
  font-size: 0.85rem;
  letter-spacing: 0.25em;
  background: linear-gradient(100deg, #66ccff, #ff77aa);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.imiku-navbar .nav-link {
  color: rgba(200, 230, 255, 0.75);
  letter-spacing: 0.25em;
  font-size: 0.9rem;
  padding-left: 1rem;
  padding-right: 1rem;
  transition: color 0.25s ease, text-shadow 0.25s ease;
}

.imiku-navbar .nav-link:hover,
.imiku-navbar .nav-link.active {
  color: var(--miku-blue);
  text-shadow: 0 0 10px rgba(102, 204, 255, 0.8);
}

.onair-badge {
  align-items: center;
  gap: 0.4rem;
  border: 1px solid rgba(255, 119, 170, 0.4);
  background: rgba(255, 119, 170, 0.08);
  border-radius: 999px;
  padding: 0.35rem 1rem;
  font-family: Consolas, monospace;
  font-size: 0.75rem;
  color: var(--miku-pink);
}

.onair-badge svg {
  animation: pulse-dot 1.6s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}
/* ============================================================
   Hero
   ============================================================ */

.hero {
  position: relative;
  overflow: hidden;
  padding: 9rem 0 10rem;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  border: 1px solid rgba(102, 204, 255, 0.35);
  background: rgba(102, 204, 255, 0.06);
  border-radius: 999px;
  padding: 0.4rem 1rem;
  font-family: Consolas, monospace;
  font-size: 0.75rem;
  letter-spacing: 0.3em;
  color: var(--miku-blue);
}

.hero-eyebrow .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--miku-pink);
  animation: pulse-dot 1.6s ease-in-out infinite;
}

.hero-title {
  font-size: clamp(3.5rem, 9vw, 7rem);
  font-weight: 900;
  letter-spacing: 0.08em;
  line-height: 1.1;
  margin: 1.5rem 0 0.25rem;
}

.hero-title-en {
  font-family: Consolas, monospace;
  font-size: clamp(2.5rem, 7vw, 5rem);
  margin: 0;
}

.hero-desc {
  max-width: 36rem;
  margin-top: 2rem;
  line-height: 1.9;
  color: rgba(200, 230, 255, 0.78);
}

.btn-imiku-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--miku-blue);
  color: #050a14;
  font-weight: 700;
  border: none;
  border-radius: 0.55rem;
  padding: 0.8rem 1.75rem;
  box-shadow: 0 0 28px rgba(102, 204, 255, 0.55);
  transition: box-shadow 0.3s ease, transform 0.3s ease;
}

.btn-imiku-primary:hover {
  color: #050a14;
  transform: translateY(-2px);
  box-shadow: 0 0 44px rgba(102, 204, 255, 0.85);
}

.btn-imiku-outline {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  border: 1px solid rgba(255, 119, 170, 0.55);
  background: rgba(255, 119, 170, 0.06);
  color: var(--miku-pink);
  font-weight: 700;
  border-radius: 0.55rem;
  padding: 0.8rem 1.75rem;
  transition: all 0.3s ease;
}

.btn-imiku-outline:hover {
  background: rgba(255, 119, 170, 0.14);
  color: var(--miku-pink);
  box-shadow: 0 0 28px rgba(255, 119, 170, 0.4);
}

.hero-signal {
  margin-top: 2rem;
  font-family: Consolas, monospace;
  font-size: 0.75rem;
  letter-spacing: 0.25em;
  color: rgba(140, 180, 210, 0.6);
}

/* Hero 右侧装饰 */
.ornament {
  position: relative;
  width: 100%;
  max-width: 420px;
  aspect-ratio: 1 / 1;
  margin: 0 auto;
}

.ornament svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.eq-wrap {
  position: absolute;
  left: 50%;
  bottom: -0.5rem;
  transform: translateX(-50%);
  display: flex;
  align-items: flex-end;
  gap: 6px;
  height: 56px;
}

/* ============================================================
   区块标题
   ============================================================ */

.section-kicker {
  font-family: Consolas, monospace;
  font-size: 0.75rem;
  letter-spacing: 0.35em;
  color: var(--miku-pink);
  margin-bottom: 0.75rem;
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 900;
  letter-spacing: 0.1em;
  margin-bottom: 3rem;
}
.imiku-footer {
  position: relative;
  z-index: 1;
  border-top: 1px solid rgba(102, 204, 255, 0.15);
  background: rgba(6, 10, 20, 0.9);
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: Consolas, monospace;
  font-size: 0.9rem;
  letter-spacing: 0.3em;
  margin: 0;
}

.footer-line {
  font-size: 0.8rem;
  letter-spacing: 0.15em;
  color: rgba(150, 190, 220, 0.55);
  margin: 0;
}

.footer-signal {
  font-family: Consolas, monospace;
  font-size: 0.65rem;
  letter-spacing: 0.25em;
  color: rgba(120, 160, 190, 0.4);
  margin: 0;
}

/* 内容区统一层级，避免被粒子/网格遮挡 */
.imiku-main {
  position: relative;
  z-index: 1;
}
.text-white {
  color: #fff;
}