/* ==========================================================================
   维盾 VProtector — 关于项目页
   ========================================================================== */

.about-page {
  background:
    radial-gradient(1000px 620px at 82% -16%, rgba(184, 246, 94, 0.09), transparent 62%),
    var(--bg);
}

/* ---------- 顶部 ---------- */
.about-header {
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--line);
  background: rgba(6, 9, 6, 0.86);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
}

.about-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 72px;
}

.about-nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

.about-nav a {
  color: var(--muted);
  font-size: 12.5px;
  transition: color 0.2s ease;
}

.about-nav a:hover {
  color: var(--lime);
}

.about-nav .nav-contact {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--text-soft);
}

.about-nav .nav-contact::before {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--lime);
  box-shadow: 0 0 8px rgba(184, 246, 94, 0.8);
}

/* ---------- Hero ---------- */
.about-hero {
  position: relative;
  padding-top: 78px;
  overflow: hidden;
}

.about-hero::before {
  content: "";
  position: absolute;
  inset: -1px;
  background-image: linear-gradient(rgba(184, 246, 94, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(184, 246, 94, 0.05) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: radial-gradient(ellipse 80% 70% at 55% 20%, #000, transparent 76%);
  mask-image: radial-gradient(ellipse 80% 70% at 55% 20%, #000, transparent 76%);
  pointer-events: none;
}

.about-hero::after {
  content: "";
  position: absolute;
  top: -340px;
  right: -180px;
  width: 760px;
  height: 760px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(184, 246, 94, 0.12), transparent 64%);
  filter: blur(30px);
  pointer-events: none;
}

.about-hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.14fr) minmax(300px, 0.86fr);
  align-items: center;
  gap: 70px;
  padding-bottom: 64px;
}

.about-hero-copy {
  animation: aboutRise 0.9s var(--ease) both;
}

@keyframes aboutRise {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.about-hero h1 {
  margin-bottom: 24px;
  font-size: clamp(2.8rem, 5vw, 4.5rem);
  font-weight: 800;
  line-height: 1.07;
  letter-spacing: -0.025em;
}

.about-hero h1 span {
  display: block;
  margin-top: 8px;
  color: var(--lime);
  text-shadow: 0 0 48px rgba(184, 246, 94, 0.24);
}

.about-hero-lead {
  max-width: 620px;
  color: var(--muted);
  font-size: 14px;
  line-height: 2;
}

.about-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.about-hero-note {
  position: relative;
  padding: 26px 26px 22px;
  border: 1px solid rgba(184, 246, 94, 0.18);
  border-radius: 16px;
  background: linear-gradient(160deg, rgba(18, 24, 17, 0.92), rgba(8, 11, 8, 0.97));
  box-shadow: 0 40px 90px -50px rgba(0, 0, 0, 0.95),
    0 0 70px -36px rgba(184, 246, 94, 0.25),
    inset 0 1px 0 rgba(255, 255, 255, 0.035);
  overflow: hidden;
  animation: aboutRise 0.9s var(--ease) 0.12s both;
}

.about-note-top {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 26px;
  color: var(--muted-2);
  font-family: var(--font-mono);
  font-size: 8px;
  letter-spacing: 0.16em;
}

.about-note-top i {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--lime);
  box-shadow: 0 0 8px rgba(184, 246, 94, 0.8);
}

.about-hero-note blockquote {
  position: relative;
  margin: 0;
  color: var(--text-soft);
  font-size: 17px;
  line-height: 1.85;
  letter-spacing: -0.01em;
}

.about-note-author {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.about-note-author .dot {
  width: 6px;
  height: 6px;
  flex-shrink: 0;
  border-radius: 50%;
  background: var(--lime);
  box-shadow: 0 0 10px rgba(184, 246, 94, 0.7);
}

.about-note-author strong {
  display: block;
  color: var(--text-soft);
  font-size: 11.5px;
  font-weight: 600;
}

.about-note-author span {
  display: block;
  margin-top: 2px;
  color: var(--muted-2);
  font-family: var(--font-mono);
  font-size: 8px;
  letter-spacing: 0.06em;
}

.about-meta-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 36px;
  padding: 16px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.about-meta-strip span {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--muted-2);
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.05em;
}

.about-meta-strip i {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--lime);
  opacity: 0.6;
}

/* ---------- 通用 section ---------- */
.about-section {
  position: relative;
  padding: 100px 0;
}

.about-side h2,
.about-section-head h2,
.author-copy h2 {
  font-weight: 800;
  letter-spacing: -0.02em;
}

/* ---------- 项目缘起 ---------- */
.about-story-grid {
  display: grid;
  grid-template-columns: 0.7fr 1.3fr;
  align-items: start;
  gap: 72px;
}

.about-side {
  position: sticky;
  top: 100px;
}

.about-side h2 {
  margin-bottom: 16px;
  font-size: clamp(1.9rem, 3.3vw, 2.6rem);
  line-height: 1.2;
}

.about-side > p:not(.eyebrow) {
  max-width: 280px;
  color: var(--muted);
  font-size: 12.5px;
  line-height: 1.9;
}

.about-side .text-link {
  margin-top: 20px;
}

.origin-item {
  position: relative;
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  gap: 22px;
  padding-bottom: 32px;
}

.origin-item:not(:last-of-type)::before {
  content: "";
  position: absolute;
  top: 40px;
  bottom: -2px;
  left: 17px;
  width: 1px;
  background: linear-gradient(rgba(184, 246, 94, 0.25), rgba(184, 246, 94, 0.04));
}

.origin-num {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  width: 35px;
  height: 35px;
  border: 1px solid rgba(184, 246, 94, 0.22);
  border-radius: 50%;
  background: #0a0e0a;
  color: var(--lime);
  font-family: var(--font-mono);
  font-size: 9px;
}

.origin-item h3 {
  margin: 4px 0 10px;
  color: var(--text);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.5;
}

.origin-item p {
  color: var(--muted);
  font-size: 13px;
  line-height: 2;
}

.origin-quote {
  margin-top: 6px;
  padding: 20px 22px;
  border: 1px solid var(--line);
  border-left: 2px solid rgba(184, 246, 94, 0.6);
  border-radius: 0 10px 10px 0;
  background: rgba(184, 246, 94, 0.025);
  color: var(--text-soft);
  font-size: 14px;
  line-height: 1.9;
}

.origin-quote span {
  display: block;
  margin-top: 10px;
  color: var(--muted-2);
  font-family: var(--font-mono);
  font-size: 8.5px;
  letter-spacing: 0.06em;
}

/* ---------- 发起人 ---------- */
.about-author-section {
  border-top: 1px solid rgba(255, 255, 255, 0.035);
  border-bottom: 1px solid rgba(255, 255, 255, 0.035);
  background: linear-gradient(180deg, rgba(184, 246, 94, 0.024), transparent 46%),
    linear-gradient(180deg, transparent, rgba(255, 255, 255, 0.012));
}

.author-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  align-items: start;
  gap: 64px;
}

.author-card {
  position: relative;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: linear-gradient(165deg, rgba(18, 24, 17, 0.7), rgba(8, 11, 8, 0.92));
  box-shadow: 0 36px 80px -52px rgba(0, 0, 0, 0.95);
  overflow: hidden;
}

.author-card::before {
  content: "";
  position: absolute;
  top: -50%;
  right: -30%;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(184, 246, 94, 0.08), transparent 66%);
  pointer-events: none;
}

.author-top {
  position: relative;
  display: flex;
  align-items: center;
  gap: 16px;
}

.author-avatar {
  display: grid;
  place-items: center;
  width: 64px;
  height: 64px;
  flex-shrink: 0;
  border: 1px solid rgba(184, 246, 94, 0.28);
  border-radius: 18px;
  background: linear-gradient(150deg, rgba(184, 246, 94, 0.18), rgba(184, 246, 94, 0.03));
  color: var(--lime);
  font-size: 27px;
  font-weight: 800;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.06);
}

.author-role {
  display: block;
  margin-bottom: 8px;
  color: var(--lime);
  font-family: var(--font-mono);
  font-size: 8px;
  letter-spacing: 0.16em;
}

.author-id h2 {
  margin-bottom: 5px;
  font-size: 23px;
  font-weight: 700;
  line-height: 1.2;
}

.author-id h2 span {
  margin-left: 6px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.02em;
}

.author-id p {
  color: var(--muted);
  font-size: 11px;
  line-height: 1.6;
}

.author-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.author-tags span {
  padding: 4px 7px;
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.015);
  color: #9aa695;
  font-family: var(--font-mono);
  font-size: 8.5px;
}

.author-quote {
  position: relative;
  margin: 22px 0 0;
  padding-left: 16px;
  border-left: 2px solid rgba(184, 246, 94, 0.5);
  color: var(--text-soft);
  font-size: 13px;
  line-height: 1.9;
}

.author-copy h2 {
  margin-bottom: 18px;
  font-size: clamp(1.9rem, 3vw, 2.5rem);
  line-height: 1.2;
}

.author-copy > p {
  margin-bottom: 14px;
  color: var(--muted);
  font-size: 13px;
  line-height: 2;
}

.author-highlights {
  margin-top: 24px;
  border-top: 1px solid var(--line);
}

.author-highlights li {
  display: flex;
  gap: 12px;
  padding: 11px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.045);
  color: var(--text-soft);
  font-size: 12px;
  line-height: 1.8;
}

.author-highlights span {
  padding-top: 3px;
  color: var(--lime);
  font-family: var(--font-mono);
  font-size: 9px;
}

/* ---------- 设计原则 ---------- */
.about-section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 50px;
  margin-bottom: 46px;
}

.about-section-head h2 {
  max-width: 620px;
  font-size: clamp(1.9rem, 3.1vw, 2.55rem);
  line-height: 1.25;
}

.about-section-head > p {
  max-width: 320px;
  flex-shrink: 0;
  color: var(--muted);
  font-size: 12.5px;
  line-height: 1.9;
}

.principles-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.principle-card {
  padding: 22px 20px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: linear-gradient(170deg, rgba(18, 24, 17, 0.58), rgba(9, 13, 9, 0.82));
  transition: transform 0.35s var(--ease), border-color 0.35s ease,
    background 0.35s ease;
}

.principle-card:hover {
  transform: translateY(-4px);
  border-color: rgba(184, 246, 94, 0.28);
  background: linear-gradient(170deg, rgba(21, 28, 19, 0.72), rgba(10, 14, 10, 0.9));
}

.principle-num {
  display: block;
  margin-bottom: 24px;
  color: var(--lime);
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.08em;
}

.principle-card h3 {
  margin-bottom: 8px;
  color: var(--text-soft);
  font-size: 14px;
  font-weight: 600;
}

.principle-card p {
  color: var(--muted);
  font-size: 11.5px;
  line-height: 1.8;
}

.about-ethics {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-top: 20px;
  padding: 18px 20px;
  border: 1px solid rgba(184, 246, 94, 0.16);
  border-radius: 10px;
  background: rgba(184, 246, 94, 0.03);
}

.about-ethics svg {
  flex-shrink: 0;
  margin-top: 2px;
  color: var(--lime);
}

.about-ethics p {
  color: var(--muted);
  font-size: 11.5px;
  line-height: 1.8;
}

.about-ethics strong {
  color: var(--text-soft);
  font-weight: 600;
}

/* ---------- 底部 CTA ---------- */
.about-cta-section {
  padding: 0 0 108px;
}

.about-cta-panel {
  position: relative;
  padding: 58px 32px;
  overflow: hidden;
  border: 1px solid rgba(184, 246, 94, 0.2);
  border-radius: 22px;
  background: radial-gradient(620px 340px at 50% 0%, rgba(184, 246, 94, 0.1), transparent 66%),
    linear-gradient(180deg, rgba(17, 23, 16, 0.9), rgba(7, 10, 7, 0.96));
  text-align: center;
  box-shadow: 0 44px 100px -72px rgba(0, 0, 0, 0.95),
    inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.about-cta-panel::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(184, 246, 94, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(184, 246, 94, 0.045) 1px, transparent 1px);
  background-size: 54px 54px;
  -webkit-mask-image: radial-gradient(ellipse 72% 100% at 50% 0%, #000, transparent 78%);
  mask-image: radial-gradient(ellipse 72% 100% at 50% 0%, #000, transparent 78%);
  pointer-events: none;
}

.about-cta-panel .eyebrow {
  position: relative;
  justify-content: center;
}

.about-cta-panel h2 {
  position: relative;
  font-size: clamp(1.9rem, 3.4vw, 2.8rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.025em;
}

.about-cta-panel > p {
  position: relative;
  max-width: 520px;
  margin: 16px auto 28px;
  color: var(--muted);
  font-size: 12.5px;
  line-height: 1.9;
}

.about-cta-actions {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
}

/* ---------- 页脚 ---------- */
.about-footer {
  border-top: 1px solid var(--line);
  background: rgba(6, 9, 6, 0.72);
}

.about-footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 22px 0;
  color: var(--muted-2);
  font-size: 10.5px;
}

.about-footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
}

.about-footer a {
  transition: color 0.2s ease;
}

.about-footer a:hover {
  color: var(--lime);
}

/* ---------- 响应式 ---------- */
@media (max-width: 1100px) {
  .about-hero-inner {
    grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.9fr);
    gap: 44px;
  }

  .about-hero h1 {
    font-size: clamp(2.6rem, 4.8vw, 4rem);
  }

  .principles-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .about-story-grid {
    gap: 48px;
  }

  .author-grid {
    gap: 44px;
  }
}

@media (max-width: 900px) {
  .about-hero {
    padding-top: 58px;
  }

  .about-hero-inner {
    grid-template-columns: 1fr;
    gap: 38px;
    padding-bottom: 48px;
  }

  .about-hero h1 {
    font-size: clamp(2.5rem, 7vw, 3.7rem);
  }

  .about-hero-note {
    max-width: 600px;
  }

  .about-section {
    padding: 76px 0;
  }

  .about-story-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .about-side {
    position: static;
  }

  .about-side > p:not(.eyebrow) {
    max-width: 560px;
  }

  .author-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .about-section-head {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
    margin-bottom: 34px;
  }

  .about-section-head > p {
    max-width: 560px;
  }

  .about-cta-section {
    padding-bottom: 76px;
  }
}

@media (max-width: 680px) {
  .about-header-inner {
    min-height: 64px;
  }

  .about-header .brand-mark {
    width: 30px;
    height: 30px;
  }

  .about-header .brand-cn {
    font-size: 17px;
  }

  .about-nav {
    gap: 14px;
  }

  .about-nav a {
    font-size: 11px;
  }

  .about-nav a:nth-child(2),
  .about-nav a:nth-child(3) {
    display: none;
  }

  .about-hero {
    padding-top: 42px;
  }

  .about-hero h1 {
    font-size: clamp(2.2rem, 11vw, 2.9rem);
  }

  .about-hero-lead {
    font-size: 12.5px;
    line-height: 1.95;
  }

  .about-actions {
    flex-direction: column;
    align-items: stretch;
    margin-top: 26px;
  }

  .about-actions .btn {
    width: 100%;
  }

  .about-hero-note {
    padding: 22px 20px 18px;
  }

  .about-hero-note blockquote {
    font-size: 15px;
  }

  .about-meta-strip {
    gap: 9px 18px;
    padding: 13px 0;
  }

  .about-meta-strip span {
    font-size: 8.5px;
  }

  .about-section {
    padding: 64px 0;
  }

  .origin-item {
    grid-template-columns: 32px minmax(0, 1fr);
    gap: 16px;
    padding-bottom: 26px;
  }

  .origin-num {
    width: 31px;
    height: 31px;
  }

  .origin-item:not(:last-of-type)::before {
    left: 15px;
    top: 36px;
  }

  .origin-item h3 {
    font-size: 15px;
  }

  .origin-item p {
    font-size: 12px;
    line-height: 1.9;
  }

  .origin-quote {
    font-size: 12.5px;
  }

  .author-card {
    padding: 22px 20px;
  }

  .author-avatar {
    width: 54px;
    height: 54px;
    border-radius: 15px;
    font-size: 23px;
  }

  .author-id h2 {
    font-size: 20px;
  }

  .author-id h2 span {
    display: block;
    margin: 4px 0 0;
  }

  .principles-grid {
    grid-template-columns: 1fr;
  }

  .principle-card {
    padding: 20px 18px;
  }

  .principle-num {
    margin-bottom: 18px;
  }

  .about-ethics {
    padding: 16px;
  }

  .about-cta-panel {
    padding: 42px 20px;
    border-radius: 18px;
  }

  .about-cta-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .about-cta-actions .btn {
    width: 100%;
  }

  .about-footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}