/* ===================== 品牌历程页 ===================== */

.page-about {
  overflow-x: clip;
}

.page-about h2 {
  margin: 0 0 14px;
  max-width: 22em;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(25px, 3.2vw, 40px);
  line-height: 1.22;
  letter-spacing: -0.01em;
  color: var(--text);
  text-wrap: balance;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: clamp(38px, 6vw, 86px) 0 clamp(48px, 7vw, 96px);
  background:
    radial-gradient(120% 92% at 94% 2%, rgba(255, 106, 26, 0.22) 0%, rgba(226, 58, 30, 0.08) 40%, transparent 70%),
    linear-gradient(180deg, var(--ink-4) 0%, var(--ink) 100%);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(to right, var(--line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--line) 1px, transparent 1px);
  background-size: 92px 92px;
  opacity: 0.55;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.9), transparent 76%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.9), transparent 76%);
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 2;
}

.page-about .about-hero__crumb {
  margin-bottom: clamp(20px, 3.5vw, 38px);
}

.page-about .about-hero__annot {
  margin: 0 0 16px;
  padding-left: 22px;
  position: relative;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--flame);
  text-transform: uppercase;
}

.page-about .about-hero__annot::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 14px;
  height: 3px;
  background: var(--grad-flame);
  transform: translateY(-50%) skewX(-28deg);
}

.page-about .about-hero__title {
  margin: 0 0 clamp(18px, 3vw, 30px);
  font-size: clamp(34px, 6vw, 76px);
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--text);
}

.page-about .about-hero__lede {
  margin: 0 0 clamp(28px, 4.5vw, 48px);
  max-width: 62ch;
  font-size: clamp(16px, 1.5vw, 18px);
  line-height: 1.82;
  color: var(--text-soft);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  max-width: 900px;
  background: var(--line);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
}

.page-about .about-stat {
  background: var(--ink-2);
  padding: 15px 16px 17px;
}

.page-about .about-stat__label {
  margin: 0 0 7px;
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--mist);
}

.page-about .about-stat__value {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: clamp(20px, 3vw, 30px);
  letter-spacing: -0.01em;
  color: var(--flame);
}

.page-about .about-stat:nth-child(4) .about-stat__value {
  color: var(--volt);
}

.page-about .about-hero__spark {
  display: none;
  position: absolute;
  right: -5%;
  bottom: -2%;
  width: min(620px, 58vw);
  height: auto;
  opacity: 0.42;
  pointer-events: none;
  z-index: 1;
}

.page-about .about-hero__spark path {
  fill: none;
  stroke-width: 2.5;
  stroke-linecap: round;
}

.page-about .about-hero__spark .s1 {
  stroke: var(--flame);
}

.page-about .about-hero__spark .s2 {
  stroke: var(--volt);
  stroke-dasharray: 7 11;
  stroke-width: 1.6;
  opacity: 0.75;
}

.page-about .about-hero__side {
  display: none;
}

@media (min-width: 720px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__spark {
    display: block;
  }
}

@media (min-width: 1240px) {
  .page-about .about-hero__side {
    display: block;
    position: absolute;
    right: 14px;
    top: 50%;
    z-index: 3;
    transform: rotate(90deg);
    transform-origin: center;
    font-family: var(--font-mono);
    font-size: 11.5px;
    letter-spacing: 0.3em;
    color: var(--mist);
    white-space: nowrap;
  }
}

/* ---------- 版本时间轴 ---------- */

.page-about .about-versions__intro {
  margin: 0;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-soft);
}

.page-about .tl {
  list-style: none;
  margin: clamp(30px, 5vw, 56px) 0 0;
  padding: 0;
}

.page-about .tl__item {
  position: relative;
  padding-left: 72px;
  margin-bottom: 28px;
}

.page-about .tl__item::before {
  content: "";
  position: absolute;
  left: 26px;
  top: 62px;
  bottom: -28px;
  width: 2px;
  background: linear-gradient(180deg, rgba(255, 106, 26, 0.55), rgba(47, 210, 255, 0.22));
}

.page-about .tl__item:last-child {
  margin-bottom: 0;
}

.page-about .tl__item:last-child::before {
  display: none;
}

.page-about .tl__badge {
  position: absolute;
  left: 0;
  top: 8px;
  width: 54px;
  height: 46px;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 0.04em;
  color: var(--ink);
  background: var(--grad-flame);
  clip-path: polygon(16% 0, 100% 0, 84% 100%, 0 100%);
}

.page-about .tl__summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 14px;
  padding: 8px 0 12px;
  list-style: none;
  cursor: pointer;
  border-bottom: 1px solid var(--line);
}

.page-about .tl__summary::-webkit-details-marker {
  display: none;
}

.page-about .tl__summary::marker {
  content: "";
}

.page-about .tl__name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(21px, 2.6vw, 30px);
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-about .tl__era {
  font-size: 12.5px;
  letter-spacing: 0.14em;
  color: var(--mist);
}

.page-about .tl__toggle {
  align-self: center;
  margin-left: auto;
  width: 11px;
  height: 11px;
  border-right: 2px solid var(--flame);
  border-bottom: 2px solid var(--flame);
  transform: rotate(45deg);
  transition: transform var(--dur) var(--ease);
}

.page-about .tl__node[open] .tl__toggle {
  transform: rotate(-135deg);
}

.page-about .tl__node:not([open]) .tl__summary {
  border-bottom-color: var(--line-strong);
}

.page-about .tl__body {
  padding: 18px 0 3px;
}

.page-about .tl__body > p {
  margin: 0 0 16px;
  max-width: 70ch;
  font-size: 16px;
  line-height: 1.82;
  color: var(--text-soft);
}

.page-about .tl__points {
  list-style: none;
  display: grid;
  gap: 9px;
  margin: 0 0 22px;
  padding: 0;
  max-width: 70ch;
}

.page-about .tl__points li {
  position: relative;
  padding-left: 22px;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--text-soft);
}

.page-about .tl__points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 10px;
  height: 2px;
  background: var(--flame);
}

.page-about .tl__body .media-frame {
  margin-top: 6px;
  max-width: 780px;
}

@media (min-width: 820px) {
  .page-about .tl__item {
    padding-left: 104px;
  }

  .page-about .tl__item::before {
    left: 34px;
  }

  .page-about .tl__badge {
    width: 70px;
    top: 4px;
  }
}

/* ---------- 两条内容线 ---------- */

.page-about .about-lines__grid {
  display: grid;
  gap: clamp(30px, 4vw, 54px);
}

.page-about .about-lines__lead h2 {
  margin: 0 0 16px;
  font-size: clamp(25px, 3.2vw, 38px);
}

.page-about .about-lines__lead > p {
  margin: 0 0 26px;
  max-width: 52ch;
  font-size: 16px;
  line-height: 1.82;
  color: var(--text-soft);
}

.page-about .about-lines__media {
  margin: 0;
}

.page-about .about-lines__cards {
  display: grid;
  gap: 20px;
  align-self: start;
}

.page-about .about-line-card {
  position: relative;
  padding: clamp(22px, 3vw, 34px);
  border-left: 3px solid var(--flame);
}

.page-about .about-line-card--data {
  border-left-color: var(--volt);
}

.page-about .about-line-card__tag {
  margin: 0 0 12px;
  font-size: 11.5px;
  letter-spacing: 0.22em;
  color: var(--mist);
}

.page-about .about-line-card h3 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 22px;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-about .about-line-card > p {
  margin: 0 0 18px;
  max-width: 48ch;
  font-size: 15px;
  line-height: 1.82;
  color: var(--text-soft);
}

.page-about .about-line-card__list {
  list-style: none;
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
}

.page-about .about-line-card__list li {
  position: relative;
  padding-left: 20px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-soft);
}

.page-about .about-line-card__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 7px;
  height: 7px;
  background: var(--lava);
  clip-path: polygon(0 0, 100% 0, 100% 100%);
}

.page-about .about-line-card--data .about-line-card__list li::before {
  background: var(--volt);
}

@media (min-width: 900px) {
  .page-about .about-lines__grid {
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
    align-items: start;
  }

  .page-about .about-line-card--data {
    margin-top: 48px;
  }
}

/* ---------- 战队档案 ---------- */

.page-about .about-roster__head p {
  margin: 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.82;
  color: var(--text-soft);
}

.page-about .about-roster__grid {
  display: grid;
  gap: clamp(28px, 4vw, 46px);
  margin-top: clamp(28px, 4vw, 46px);
}

.page-about .about-roster__media {
  margin: 0;
}

.page-about .about-roster__steps {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-roster__steps li {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 16px;
  padding: 16px 0;
  border-top: 1px solid var(--line);
}

.page-about .about-roster__steps li:last-child {
  border-bottom: 1px solid var(--line);
}

.page-about .about-roster__steps .mono {
  padding-top: 5px;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: var(--flame);
}

.page-about .about-roster__steps h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17px;
  color: var(--text);
}

.page-about .about-roster__steps p {
  margin: 0;
  max-width: 50ch;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--text-soft);
}

.page-about .about-roster__note {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin-top: clamp(26px, 4vw, 42px);
  padding: 16px 20px;
  border-left: 3px solid var(--flame);
  background: linear-gradient(96deg, rgba(255, 106, 26, 0.13), rgba(47, 210, 255, 0.06) 70%, transparent);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%);
}

.page-about .about-roster__note p {
  margin: 0;
  flex: 1 1 260px;
  font-size: 15px;
  line-height: 1.72;
  color: var(--text-soft);
}

@media (min-width: 880px) {
  .page-about .about-roster__grid {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    align-items: center;
  }
}

/* ---------- 一周节奏 ---------- */

.page-about .about-cadence__head p {
  margin: 0;
  max-width: 64ch;
  font-size: 16px;
  line-height: 1.82;
  color: var(--text-soft);
}

.page-about .cal {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: clamp(28px, 4vw, 46px) 0 0;
  padding: 0;
}

.page-about .cal__day {
  position: relative;
  overflow: hidden;
  min-height: 118px;
  padding: 14px 14px 18px;
  background: var(--ink-2);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%);
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .cal__day:hover,
.page-about .cal__day:focus-within {
  border-color: rgba(255, 106, 26, 0.62);
  background: var(--ink-3);
}

.page-about .cal__day--peak {
  border-color: rgba(255, 106, 26, 0.55);
  background:
    linear-gradient(160deg, rgba(255, 106, 26, 0.24), rgba(226, 58, 30, 0.06) 62%, transparent),
    var(--ink-2);
}

.page-about .cal__name {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--mist);
}

.page-about .cal__day--peak .cal__name {
  color: var(--flame);
}

.page-about .cal__title {
  display: block;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 16px;
  line-height: 1.3;
  color: var(--text);
}

.page-about .cal__pop {
  display: block;
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--text-soft);
}

@media (min-width: 700px) {
  .page-about .cal {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 1080px) {
  .page-about .cal {
    grid-template-columns: repeat(7, minmax(0, 1fr));
  }

  .page-about .cal__day {
    min-height: 148px;
  }

  .page-about .cal__pop {
    position: absolute;
    inset: 0;
    z-index: 4;
    margin: 0;
    padding: 14px;
    background: var(--ink-4);
    border: 1px solid rgba(255, 106, 26, 0.45);
    clip-path: polygon(0 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--dur) var(--ease), visibility var(--dur) var(--ease);
  }

  .page-about .cal__day:hover .cal__pop,
  .page-about .cal__day:focus-within .cal__pop {
    opacity: 1;
    visibility: visible;
  }
}

/* ---------- 暖纸阅读区 ---------- */

.page-about .about-values__paper {
  padding: clamp(28px, 5vw, 64px);
  clip-path: polygon(0 0, calc(100% - 46px) 0, 100% 46px, 100% 100%, 0 100%);
}

.page-about .about-values__eyebrow {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--paper-accent);
}

.page-about .about-values__paper h2 {
  margin: 0 0 clamp(22px, 3vw, 34px);
  max-width: 26ch;
  font-size: clamp(24px, 3.2vw, 36px);
  line-height: 1.28;
  color: var(--paper-ink);
}

.page-about .about-values__cols {
  display: grid;
  gap: clamp(20px, 3vw, 34px);
}

.page-about .about-values__col h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17px;
  color: var(--paper-ink);
}

.page-about .about-values__col h3::before {
  content: "";
  display: block;
  width: 26px;
  height: 3px;
  margin-bottom: 10px;
  background: var(--lava);
}

.page-about .about-values__col p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--paper-body);
}

.page-about .about-values__foot {
  margin: clamp(24px, 4vw, 38px) 0 0;
  padding-top: 20px;
  max-width: 72ch;
  border-top: 1px solid rgba(20, 22, 28, 0.16);
  font-size: 15px;
  line-height: 1.85;
  color: var(--paper-body);
}

.page-about .about-values__foot a {
  color: var(--paper-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

@media (min-width: 800px) {
  .page-about .about-values__cols {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 结尾行动区 ---------- */

.page-about .about-next {
  padding-bottom: clamp(56px, 8vw, 104px);
}

.page-about .about-next__inner {
  display: grid;
  gap: 26px;
  padding: clamp(26px, 4vw, 46px);
  border: 1px solid var(--line-strong);
  background:
    radial-gradient(130% 170% at 100% 0%, rgba(47, 210, 255, 0.14), transparent 62%),
    var(--ink-2);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
}

.page-about .about-next__inner h2 {
  margin: 0 0 12px;
  font-size: clamp(23px, 3vw, 34px);
}

.page-about .about-next__inner p {
  margin: 0;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.82;
  color: var(--text-soft);
}

.page-about .about-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

@media (min-width: 880px) {
  .page-about .about-next__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 42px;
  }
}