/* ============================================================
   about.css — 春斋主人 · 黑暗奢华版
   结构/选择器与原有完全一致，仅替换视觉层
   ============================================================ */

    /* ── 全局底色 ── */
    .about-page {
      padding-top: var(--gap-2xl);
      padding-bottom: var(--gap-3xl);
      position: relative;
      background:
        radial-gradient(ellipse 80% 50% at 50% -10%, rgba(94,210,156,0.06) 0%, transparent 70%),
        radial-gradient(ellipse 60% 40% at 70% 20%, rgba(94,210,156,0.03) 0%, transparent 60%),
        linear-gradient(180deg, #070b0a 0%, #0a0e0d 40%, #0c0f0e 100%);
    }

    /* 装饰性网格线（参考 CodeNest 设计） */
    .about-page::before {
      content: '';
      position: fixed;
      inset: 0;
      pointer-events: none;
      z-index: 0;
      background-image:
        linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px),
        linear-gradient(0deg, rgba(255,255,255,0.02) 1px, transparent 1px);
      background-size: 25% 100%, 100% 60px;
      background-position: 25% 0, 0 0;
    }

    /* 中心辉光 */
    .about-page::after {
      content: '';
      position: fixed;
      top: -80px;
      left: 50%;
      transform: translateX(-50%);
      width: 600px;
      height: 300px;
      background: radial-gradient(ellipse, rgba(94,210,156,0.08) 0%, transparent 70%);
      filter: blur(40px);
      pointer-events: none;
      z-index: 0;
    }

    /* ── Hero ── */
    .about-hero {
      display: grid;
      grid-template-columns: auto 1fr;
      gap: var(--gap-xl);
      align-items: center;
      margin-bottom: var(--gap-3xl);
      padding-bottom: var(--gap-2xl);
      border-bottom: 1px solid rgba(94,210,156,0.12);
      position: relative;
      z-index: 1;
    }

    .about-monogram {
      width: clamp(80px, 12vw, 120px);
      height: clamp(80px, 12vw, 120px);
      display: flex; align-items: center; justify-content: center;
      font-family: var(--font-serif);
      font-size: clamp(2rem, 5vw, 3.5rem);
      font-weight: 900; letter-spacing: -0.06em;
      color: #5ed29c;
      user-select: none;
      position: relative;
      background: rgba(255,255,255,0.02);
      border: 1px solid rgba(94,210,156,0.2);
      box-shadow:
        0 0 40px rgba(94,210,156,0.06),
        inset 0 0 40px rgba(94,210,156,0.03);
      backdrop-filter: blur(8px);
      -webkit-backdrop-filter: blur(8px);
      transition: border-color 0.4s ease, box-shadow 0.4s ease;
    }

    .about-monogram::before {
      content: '';
      position: absolute;
      inset: -1px;
      padding: 1.2px;
      background: linear-gradient(135deg, rgba(94,210,156,0.3), transparent 40%, rgba(94,210,156,0.1));
      -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
      -webkit-mask-composite: xor;
      mask-composite: exclude;
      pointer-events: none;
    }

    .about-hero-text { min-width: 0; }

    .about-hero-label {
      font-family: var(--font-mono);
      font-size: 0.6rem;
      text-transform: uppercase;
      letter-spacing: 0.2em;
      color: #5ed29c;
      margin-bottom: var(--gap-xs);
      font-weight: 600;
    }

    .about-hero-name {
      font-family: 'Inter', sans-serif;
      font-size: clamp(1.8rem, 4vw, 3rem);
      font-weight: 800;
      letter-spacing: -0.04em;
      line-height: 1.1;
      margin-bottom: var(--gap-xs);
      color: #f0f0f0;
      text-shadow: 0 0 40px rgba(94,210,156,0.08);
    }

    .about-hero-aka {
      font-family: var(--font-mono);
      font-size: 0.68rem;
      color: rgba(255,255,255,0.4);
      letter-spacing: 0.1em;
    }

    /* ── Section Common ── */
    .about-section {
      margin-bottom: var(--gap-2xl);
      position: relative;
      z-index: 1;
    }

    .about-section-label {
      font-family: var(--font-mono);
      font-size: 0.58rem;
      text-transform: uppercase;
      letter-spacing: 0.2em;
      color: #5ed29c;
      margin-bottom: var(--gap-md);
      padding-left: var(--gap-sm);
      border-left: 2px solid #5ed29c;
      font-weight: 600;
    }

    .about-section-title {
      font-family: 'Inter', sans-serif;
      font-size: clamp(1.25rem, 2.5vw, 1.75rem);
      font-weight: 700;
      letter-spacing: -0.03em;
      line-height: 1.3;
      margin-bottom: var(--gap-md);
      color: #e8e8e8;
    }

    .about-section-body {
      font-size: 0.88rem;
      color: rgba(255,255,255,0.55);
      line-height: 2;
      max-width: 620px;
    }

    .about-section-body strong {
      color: rgba(255,255,255,0.8);
      font-weight: 600;
    }

    /* ── Grid Section (巡天 + 拓荒) ── */
    .about-duo {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: var(--gap-xl);
      margin-bottom: var(--gap-2xl);
      position: relative;
      z-index: 1;
    }

    .about-card {
      padding: var(--gap-lg);
      background: rgba(255,255,255,0.02);
      border: 1px solid rgba(255,255,255,0.06);
      backdrop-filter: blur(6px);
      -webkit-backdrop-filter: blur(6px);
      transition: border-color 0.3s ease, background 0.3s ease;
      box-shadow: inset 0 1px 1px rgba(255,255,255,0.05);
      position: relative;
    }

    .about-card::before {
      content: '';
      position: absolute;
      inset: -1px;
      padding: 1px;
      background: linear-gradient(180deg, rgba(255,255,255,0.08), transparent 60%);
      -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
      -webkit-mask-composite: xor;
      mask-composite: exclude;
      pointer-events: none;
    }

    .about-card:hover {
      border-color: rgba(94,210,156,0.2);
      background: rgba(255,255,255,0.03);
    }

    .about-card-icon {
      font-family: var(--font-serif);
      font-size: 1.5rem;
      margin-bottom: var(--gap-sm);
      color: #5ed29c;
      opacity: 0.6;
    }

    .about-card-title {
      font-family: 'Inter', sans-serif;
      font-size: 1.05rem;
      font-weight: 700;
      letter-spacing: -0.02em;
      margin-bottom: var(--gap-sm);
      color: #e0e0e0;
    }

    .about-card-body {
      font-size: 0.82rem;
      color: rgba(255,255,255,0.5);
      line-height: 1.85;
    }

    .about-card-body strong {
      color: rgba(255,255,255,0.75);
    }

    /* ── Quote Block ── */
    .about-quote {
      padding: var(--gap-xl) var(--gap-lg);
      margin-bottom: var(--gap-2xl);
      position: relative;
      z-index: 1;
      background: rgba(255,255,255,0.01);
      border: 1px solid rgba(255,255,255,0.06);
      box-shadow: inset 0 1px 1px rgba(255,255,255,0.04);
    }

    .about-quote::before {
      content: '"';
      position: absolute;
      top: -8px;
      left: 16px;
      font-size: 4rem;
      font-family: var(--font-serif);
      color: rgba(94,210,156,0.15);
      line-height: 1;
      pointer-events: none;
    }

    .about-quote-text {
      font-family: var(--font-serif);
      font-size: clamp(1rem, 2vw, 1.25rem);
      font-weight: 600;
      font-style: italic;
      line-height: 1.75;
      letter-spacing: -0.01em;
      margin-bottom: var(--gap-md);
      color: rgba(255,255,255,0.7);
    }

    .about-quote-author {
      font-family: var(--font-mono);
      font-size: 0.62rem;
      text-transform: uppercase;
      letter-spacing: 0.12em;
      color: #5ed29c;
      text-align: right;
      opacity: 0.7;
    }

    /* ── Three Questions ── */
    .about-questions {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 1px;
      margin-bottom: var(--gap-2xl);
      background: rgba(255,255,255,0.06);
      border: 1px solid rgba(255,255,255,0.06);
      position: relative;
      z-index: 1;
    }

    .about-q-card {
      background: rgba(255,255,255,0.01);
      padding: var(--gap-lg);
      text-align: center;
      backdrop-filter: blur(4px);
      -webkit-backdrop-filter: blur(4px);
    }

    .about-q-num {
      font-family: var(--font-mono);
      font-size: 0.58rem;
      color: #5ed29c;
      letter-spacing: 0.15em;
      margin-bottom: var(--gap-sm);
      opacity: 0.7;
    }

    .about-q-text {
      font-family: var(--font-serif);
      font-size: 0.85rem;
      font-weight: 600;
      line-height: 1.7;
      letter-spacing: -0.01em;
      color: rgba(255,255,255,0.65);
    }

    /* ── To Visitors ── */
    .about-visitors {
      border-top: 1px solid rgba(255,255,255,0.06);
      border-bottom: 1px solid rgba(255,255,255,0.06);
      padding: var(--gap-xl) 0;
      margin-bottom: var(--gap-2xl);
      position: relative;
      z-index: 1;
    }

    .about-visitors-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: var(--gap-lg);
    }

    .about-v-item {
      text-align: center;
      padding: var(--gap-md);
      border-radius: 4px;
      transition: background 0.3s ease;
    }

    .about-v-item:hover {
      background: rgba(255,255,255,0.02);
    }

    .about-v-item i {
      font-size: 1.2rem;
      margin-bottom: var(--gap-sm);
      display: block;
      color: #5ed29c;
      opacity: 0.4;
    }

    .about-v-label {
      font-family: var(--font-mono);
      font-size: 0.6rem;
      text-transform: uppercase;
      letter-spacing: 0.12em;
      color: rgba(255,255,255,0.5);
      margin-bottom: var(--gap-xs);
    }

    .about-v-desc {
      font-family: var(--font-serif);
      font-size: 0.8rem;
      line-height: 1.7;
      color: rgba(255,255,255,0.4);
    }

    /* ── Closing ── */
    .about-closing {
      max-width: 560px;
      margin: 0 auto;
      text-align: center;
      position: relative;
      z-index: 1;
    }

    .about-closing-border {
      padding: var(--gap-xl) var(--gap-lg);
      border: 1px solid rgba(94,210,156,0.12);
      background: rgba(255,255,255,0.01);
      box-shadow: 0 0 40px rgba(94,210,156,0.04), inset 0 1px 1px rgba(255,255,255,0.04);
      position: relative;
    }

    .about-closing-border::before {
      content: '';
      position: absolute;
      inset: -1px;
      padding: 1px;
      background: linear-gradient(180deg, rgba(94,210,156,0.15), transparent 50%, rgba(94,210,156,0.05));
      -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
      -webkit-mask-composite: xor;
      mask-composite: exclude;
      pointer-events: none;
    }

    .about-closing-text {
      font-family: var(--font-serif);
      font-size: 0.88rem;
      line-height: 2;
      color: rgba(255,255,255,0.55);
      margin-bottom: var(--gap-lg);
    }

    .about-closing-signature {
      font-family: 'Inter', sans-serif;
      font-size: 1rem;
      font-weight: 700;
      letter-spacing: -0.02em;
      margin-bottom: 2px;
      color: #e8e8e8;
    }

    .about-closing-meta {
      font-family: var(--font-mono);
      font-size: 0.6rem;
      text-transform: uppercase;
      letter-spacing: 0.15em;
      color: rgba(255,255,255,0.3);
    }

    /* ── Final Message ── */
    .about-final {
      margin-top: var(--gap-2xl);
      padding: var(--gap-lg);
      border: 1px solid rgba(255,255,255,0.06);
      background: rgba(255,255,255,0.01);
      position: relative;
      z-index: 1;
      backdrop-filter: blur(4px);
      -webkit-backdrop-filter: blur(4px);
    }

    .about-final-label {
      font-family: var(--font-mono);
      font-size: 0.58rem;
      text-transform: uppercase;
      letter-spacing: 0.18em;
      color: #5ed29c;
      margin-bottom: var(--gap-sm);
      opacity: 0.7;
    }

    .about-final-text {
      font-size: 0.8rem;
      color: rgba(255,255,255,0.5);
      line-height: 1.9;
    }

    .about-final-name {
      font-family: var(--font-serif);
      font-weight: 700;
      color: #5ed29c;
    }

    /* ── Contact ── */
    .about-contact {
      margin-top: var(--gap-lg);
      margin-bottom: var(--gap-2xl);
      position: relative;
      z-index: 1;
    }

    .about-contact-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 1px;
      background: rgba(255,255,255,0.06);
      border: 1px solid rgba(255,255,255,0.06);
    }

    .about-contact-item {
      background: rgba(255,255,255,0.01);
      padding: var(--gap-md) var(--gap-lg);
      display: flex;
      align-items: center;
      gap: var(--gap-sm);
      backdrop-filter: blur(4px);
      -webkit-backdrop-filter: blur(4px);
    }

    .about-contact-item i {
      font-size: 0.9rem;
      color: #5ed29c;
      opacity: 0.4;
      flex-shrink: 0;
    }

    .about-contact-info { min-width: 0; }

    .about-contact-label {
      font-family: var(--font-mono);
      font-size: 0.56rem;
      text-transform: uppercase;
      letter-spacing: 0.15em;
      color: rgba(255,255,255,0.35);
      margin-bottom: 1px;
    }

    .about-contact-value {
      font-family: var(--font-mono);
      font-size: 0.72rem;
      color: rgba(255,255,255,0.7);
      letter-spacing: 0.04em;
      word-break: break-all;
    }

    @media (max-width: 768px) {
      .about-contact-grid { grid-template-columns: 1fr; }
    }

    /* ── Back Link ── */
    .about-back {
      margin-top: var(--gap-2xl);
      text-align: center;
      position: relative;
      z-index: 1;
    }

    .about-back .btn {
      color: rgba(255,255,255,0.4);
      border-color: rgba(255,255,255,0.1);
      transition: color 0.3s, border-color 0.3s;
    }

    .about-back .btn:hover {
      color: #5ed29c;
      border-color: rgba(94,210,156,0.3);
    }

    /* ── Responsive ── */
    @media (max-width: 768px) {
      .about-duo { grid-template-columns: 1fr; }
      .about-questions { grid-template-columns: 1fr; gap: 1px; }
      .about-visitors-grid { grid-template-columns: 1fr; gap: var(--gap-lg); }
      .about-hero { gap: var(--gap-lg); }
    }
    @media (max-width: 480px) {
      .about-hero { grid-template-columns: 1fr; text-align: center; }
      .about-monogram { margin: 0 auto; }
      .about-hero-label { border-left: none; }
      .about-hero-name { font-size: 1.5rem; }
    }