/* ========================================
   品牌概况页 · page-about
   展览画册式：错动网格 + 大数字 + 草原曲线
   移动优先，桌面在 760px / 1080px 升格
========================================= */

.page-about {
  --about-radius-lg: 22px;
  --about-radius-md: 14px;
  --section-pad: clamp(56px, 8vw, 96px);
  --about-gold-deep: #a97e03;
  background:
    radial-gradient(ellipse at 96% 14%, rgba(0, 114, 206, 0.06) 0%, transparent 30%),
    radial-gradient(ellipse at 8% 62%, rgba(0, 166, 81, 0.06) 0%, transparent 32%),
    var(--clr-milk);
  overflow-x: hidden;
}

.page-about .section-head {
  margin-bottom: 56px;
}

.page-about .section-head h2 {
  font-family: var(--font-head);
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 900;
  line-height: 1.2;
  color: var(--clr-ink);
  margin: 10px 0 12px;
}

.page-about .section-head .section-sub {
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.75;
  color: #4b5d6b;
  max-width: 720px;
  margin: 0;
}

.page-about .section-head--center {
  text-align: center;
}

.page-about .section-head--center .section-sub {
  margin-left: auto;
  margin-right: auto;
}

.page-about .kicker {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 13px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--clr-green);
}

/* ===== 首屏 hero ===== */
.page-about .about-hero {
  padding: 32px 0 80px;
}

.page-about .about-hero__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.page-about .about-hero__copy {
  order: 1;
}

.page-about .about-hero__figure {
  order: 2;
  margin: 0;
}

.page-about .about-hero__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 20px;
}

.page-about .about-hero__copy h1 {
  font-family: var(--font-head);
  font-size: clamp(32px, 6.4vw, 56px);
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--clr-ink);
  margin: 0 0 20px;
}

.page-about .about-hero__copy h1::after {
  content: '';
  display: block;
  width: 72px;
  height: 6px;
  margin-top: 18px;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--clr-green), var(--clr-blue));
}

.page-about .about-hero__lead {
  font-family: var(--font-body);
  font-size: 18px;
  line-height: 1.75;
  color: #33475b;
  margin: 0 0 28px;
  max-width: 56ch;
}

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

.page-about .about-hero__img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--about-radius-lg);
  box-shadow: 0 20px 48px rgba(10, 34, 28, 0.22);
  border: 1px solid rgba(0, 0, 0, 0.08);
}

.page-about .about-hero__caption {
  font-size: 13px;
  color: #64748b;
  padding: 10px 4px 0;
  font-style: italic;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  margin-top: 36px;
  border-radius: var(--about-radius-lg);
  overflow: hidden;
  background: rgba(0, 0, 0, 0.14);
  box-shadow: 0 16px 36px rgba(10, 34, 28, 0.18);
}

.page-about .about-hero__stat {
  background: var(--clr-deep);
  color: #fff;
  padding: 20px 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-hero__stat:nth-child(odd) {
  background: linear-gradient(135deg, #0B3B2E, #123f30);
}

.page-about .about-hero__stat:nth-child(even) {
  background: linear-gradient(135deg, #123f30, #1a4a38);
}

.page-about .about-hero__stat-num {
  font-family: var(--font-head);
  font-size: 28px;
  font-weight: 900;
  line-height: 1;
  color: #fff;
}

.page-about .about-hero__stat:nth-child(2) .about-hero__stat-num {
  color: #34d07a;
}

.page-about .about-hero__stat:nth-child(3) .about-hero__stat-num {
  color: var(--clr-gold);
}

.page-about .about-hero__stat:nth-child(4) .about-hero__stat-num {
  color: #6cbaff;
}

.page-about .about-hero__stat-label {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.72);
}

/* ===== 品牌故事 ===== */
.page-about .about-story {
  padding: var(--section-pad) 0 32px;
}

.page-about .about-story__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
}

.page-about .about-story__main h2 {
  font-family: var(--font-head);
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 900;
  line-height: 1.2;
  color: var(--clr-ink);
  margin: 10px 0 24px;
}

.page-about .about-story__body p {
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.8;
  color: #2d3f4f;
  margin: 0 0 20px;
}

.page-about .about-story__quote {
  margin: 28px 0 0;
  padding: 20px 24px;
  border-left: 4px solid var(--clr-green);
  background: linear-gradient(90deg, var(--clr-pale) 0%, transparent 100%);
  font-family: var(--font-body);
  font-size: 19px;
  font-style: italic;
  color: var(--clr-deep);
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
}

.page-about .about-story__aside {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.page-about .about-story__fact {
  background: #fff;
  border: 1px solid #e2e8f0;
  border-radius: var(--about-radius-md);
  padding: 18px 14px;
  text-align: center;
  box-shadow: 0 4px 16px rgba(10, 34, 28, 0.05);
}

.page-about .about-story__fact-num {
  display: block;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 26px;
  line-height: 1;
  color: var(--clr-blue);
}

.page-about .about-story__fact:nth-child(2) .about-story__fact-num {
  color: var(--clr-green);
}

.page-about .about-story__fact:nth-child(3) .about-story__fact-num {
  color: var(--clr-orange);
}

.page-about .about-story__fact-lab {
  display: block;
  margin-top: 8px;
  font-size: 12px;
  color: #6b7b88;
}

/* ===== 发展里程碑 ===== */
.page-about .about-milestone {
  padding: var(--section-pad) 0 24px;
}

.page-about .about-milestone__track {
  position: relative;
  max-width: 940px;
  margin: 0 auto;
  padding: 42px 0 10px 34px;
}

.page-about .about-milestone__line {
  position: absolute;
  top: 0;
  left: 0;
  width: 34px;
  height: 100%;
  pointer-events: none;
}

.page-about .about-milestone__node {
  position: relative;
  padding-left: 26px;
  margin-bottom: 36px;
}

.page-about .about-milestone__dot {
  position: absolute;
  top: 26px;
  left: -25px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--clr-green);
  border: 4px solid var(--clr-milk);
  box-shadow: 0 0 0 3px var(--clr-pale);
}

.page-about .about-milestone__node--v4 .about-milestone__dot {
  background: var(--clr-orange);
  box-shadow: 0 0 0 3px #ffd9d0;
}

.page-about .about-milestone__card {
  background: #fff;
  border-radius: 18px;
  padding: 26px 28px;
  box-shadow: 0 8px 26px rgba(10, 34, 28, 0.07);
  border: 1px solid #e3eaee;
  border-left: 5px solid var(--clr-green);
  transition: transform 180ms ease, box-shadow 180ms ease;
}

.page-about .about-milestone__card:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 34px rgba(10, 34, 28, 0.13);
}

.page-about .about-milestone__node--v4 .about-milestone__card {
  border-left-color: var(--clr-orange);
  background: linear-gradient(135deg, #fff8f5, #fff);
}

.page-about .about-milestone__version {
  display: inline-block;
  font-family: var(--font-head);
  font-style: italic;
  font-weight: 900;
  font-size: 32px;
  line-height: 1;
  color: var(--clr-green);
  margin-bottom: 12px;
}

.page-about .about-milestone__node--v4 .about-milestone__version {
  color: var(--clr-orange);
}

.page-about .about-milestone__card h3 {
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 800;
  color: var(--clr-ink);
  margin: 0 0 10px;
}

.page-about .about-milestone__card p {
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.7;
  color: #4b5d6b;
  margin: 0;
}

/* ===== 数据能力 ===== */
.page-about .about-capability {
  background: var(--clr-deep);
  color: #fff;
  padding: var(--section-pad) 0;
  position: relative;
}

.page-about .about-capability::after {
  content: '';
  position: absolute;
  right: 0;
  bottom: 0;
  width: 280px;
  height: 120px;
  background: radial-gradient(circle at 70% 100%, rgba(0, 166, 81, 0.4), transparent 70%);
  pointer-events: none;
}

.page-about .about-capability__head {
  max-width: 720px;
  margin-bottom: 48px;
}

.page-about .about-capability__head .kicker {
  color: #34d07a;
}

.page-about .about-capability__head h2 {
  font-family: var(--font-head);
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 900;
  line-height: 1.2;
  color: #fff;
  margin: 10px 0 16px;
}

.page-about .about-capability__head p {
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.72);
  margin: 0;
}

.page-about .about-capability__cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-bottom: 44px;
}

.page-about .about-capability__card {
  background: linear-gradient(140deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.04));
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--about-radius-lg);
  padding: 32px 28px;
}

.page-about .about-capability__num {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(44px, 6vw, 64px);
  line-height: 1;
  color: #fff;
}

.page-about .about-capability__card:nth-child(2) .about-capability__num {
  color: #34d07a;
}

.page-about .about-capability__card:nth-child(3) .about-capability__num {
  color: var(--clr-gold);
}

.page-about .about-capability__label {
  display: block;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 18px;
  margin: 14px 0 8px;
  color: rgba(255, 255, 255, 0.96);
}

.page-about .about-capability__desc {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.66);
  margin: 0;
}

.page-about .about-capability__bottom {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

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

.page-about .about-capability__figure img {
  width: 100%;
  height: auto;
  border-radius: var(--about-radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.16);
}

.page-about .about-capability__figure figcaption {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
  padding: 8px 2px 0;
}

.page-about .about-capability__refresh {
  padding: 28px;
  border-radius: var(--about-radius-lg);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.page-about .about-capability__refresh h3 {
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 800;
  margin: 0 0 18px;
  color: #fff;
}

.page-about .about-capability__list {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
}

.page-about .about-capability__list li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 12px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.09);
}

.page-about .about-capability__list li:last-child {
  border-bottom: none;
}

.page-about .about-capability__list strong {
  font-family: var(--font-head);
  font-size: 17px;
  color: #34d07a;
}

.page-about .about-capability__list span {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.62);
}

.page-about .about-capability__note {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.7);
  margin: 0;
  padding: 14px 16px;
  background: rgba(242, 183, 5, 0.12);
  border-radius: 12px;
  border-left: 3px solid var(--clr-gold);
}

/* ===== 资质与认证 ===== */
.page-about .about-credential {
  padding: var(--section-pad) 0;
}

.page-about .about-credential__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 44px;
}

.page-about .about-credential__intro .kicker {
  color: var(--about-gold-deep);
}

.page-about .about-credential__intro h2 {
  font-family: var(--font-head);
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 900;
  line-height: 1.2;
  color: var(--clr-ink);
  margin: 10px 0 18px;
}

.page-about .about-credential__intro p {
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.75;
  color: #2f4150;
  margin: 0;
}

.page-about .about-credential__list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

.page-about .about-credential__item {
  background: #fff;
  border: 1px solid #e0e9ef;
  border-radius: var(--about-radius-lg);
  padding: 28px;
  box-shadow: 0 6px 20px rgba(10, 34, 28, 0.05);
  transform: skewX(-1.5deg);
  transition: transform 180ms ease;
}

.page-about .about-credential__item:hover {
  transform: skewX(-1.5deg) translateY(-3px);
}

.page-about .about-credential__item--feature {
  background: linear-gradient(135deg, #f0faf0, #fff 70%);
  border-color: var(--clr-pale);
}

.page-about .about-credential__badge {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  padding: 5px 12px;
  border-radius: 20px;
  background: var(--clr-pale);
  color: var(--clr-deep);
  margin-bottom: 14px;
}

.page-about .about-credential__item--feature .about-credential__badge {
  background: var(--clr-green);
  color: #fff;
}

.page-about .about-credential__name {
  display: block;
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 800;
  color: var(--clr-ink);
  margin-bottom: 8px;
}

.page-about .about-credential__note {
  display: block;
  font-size: 14px;
  color: #7a8a96;
}

/* ===== 团队与协作 ===== */
.page-about .about-team {
  padding: var(--section-pad) 0;
}

.page-about .about-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  align-items: center;
}

.page-about .about-team__visual {
  margin: 0;
  position: relative;
}

.page-about .about-team__visual::after {
  content: '';
  position: absolute;
  right: -14px;
  bottom: -14px;
  width: 70%;
  height: 70%;
  border-radius: var(--about-radius-lg);
  background: linear-gradient(135deg, var(--clr-pale), transparent 80%);
  z-index: -1;
}

.page-about .about-team__visual img {
  width: 100%;
  height: auto;
  border-radius: var(--about-radius-lg);
  box-shadow: 0 18px 46px rgba(10, 34, 28, 0.2);
}

.page-about .about-team__visual figcaption {
  font-size: 13px;
  color: #667985;
  padding: 10px 4px 0;
}

.page-about .about-team__content .kicker {
  color: var(--clr-blue);
}

.page-about .about-team__content h2 {
  font-family: var(--font-head);
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 900;
  line-height: 1.2;
  margin: 10px 0 18px;
  color: var(--clr-ink);
}

.page-about .about-team__lead {
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.75;
  color: #2f4150;
  margin-bottom: 28px;
}

.page-about .about-team__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 32px;
}

.page-about .about-team__stat {
  background: #fff;
  border: 1px solid var(--clr-mist);
  border-radius: var(--about-radius-md);
  padding: 22px 14px;
  text-align: center;
  box-shadow: 0 4px 14px rgba(10, 34, 28, 0.05);
}

.page-about .about-team__stat-num {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 34px;
  line-height: 1;
  color: var(--clr-blue);
}

.page-about .about-team__stat:nth-child(2) .about-team__stat-num {
  color: var(--clr-green);
}

.page-about .about-team__stat:nth-child(3) .about-team__stat-num {
  color: var(--clr-orange);
}

.page-about .about-team__stat-lab {
  display: block;
  margin-top: 8px;
  font-size: 12px;
  font-weight: 600;
  color: #6b7b88;
}

.page-about .about-team__contact h3 {
  font-family: var(--font-head);
  font-size: 19px;
  font-weight: 800;
  margin-bottom: 12px;
  color: var(--clr-ink);
}

.page-about .about-team__note {
  font-size: 13px;
  line-height: 1.7;
  color: #8292a0;
  margin-top: 16px;
}

/* ===== 合作伙伴 ===== */
.page-about .about-partner {
  padding: var(--section-pad) 0;
  background: var(--clr-mist);
}

.page-about .about-partner__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  max-width: 840px;
  margin: 0 auto;
}

.page-about .about-partner__item {
  display: flex;
  align-items: center;
  gap: 18px;
  background: #fff;
  border-radius: var(--about-radius-lg);
  padding: 26px 28px;
  border: 1px solid #d9e6ed;
  transition: transform 180ms ease, border-color 180ms ease;
  cursor: default;
}

.page-about .about-partner__item:hover {
  transform: translateY(-3px);
  border-color: var(--clr-green);
}

.page-about .about-partner__index {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 30px;
  color: var(--about-gold-deep);
  min-width: 48px;
}

.page-about .about-partner__info {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .about-partner__name {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 19px;
  color: var(--clr-ink);
}

.page-about .about-partner__role {
  font-size: 14px;
  color: #6b7b88;
}

.page-about .about-partner__more {
  text-align: center;
  max-width: 560px;
  margin: 28px auto 0;
  font-family: var(--font-body);
  font-size: 15px;
  color: #6b7b88;
  line-height: 1.75;
}

/* ===== CTA ===== */
.page-about .about-cta {
  padding: var(--section-pad) 0;
}

.page-about .about-cta__inner {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  background: linear-gradient(120deg, var(--clr-green), #008f45 60%, var(--clr-blue));
  border-radius: 26px;
  padding: 44px 36px;
  color: #fff;
  overflow: hidden;
  align-items: center;
}

.page-about .about-cta__inner::before {
  content: '';
  position: absolute;
  top: -40px;
  right: -30px;
  width: 200px;
  height: 200px;
  background: radial-gradient(circle at center, rgba(255, 255, 255, 0.16), transparent 70%);
  pointer-events: none;
}

.page-about .about-cta__text h2 {
  font-family: var(--font-head);
  font-size: clamp(26px, 3.6vw, 38px);
  font-weight: 900;
  margin: 0 0 10px;
}

.page-about .about-cta__text p {
  font-family: var(--font-body);
  font-size: 17px;
  color: rgba(255, 255, 255, 0.86);
  margin: 0;
}

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

.page-about .about-cta__privacy {
  color: rgba(255, 255, 255, 0.72);
  font-size: 13px;
  text-decoration: underline;
  justify-self: start;
}

/* ===== 响应式提升 ===== */
@media (min-width: 760px) {
  .page-about .about-hero__inner {
    grid-template-columns: 1.05fr 0.95fr;
    align-items: center;
    gap: 44px;
  }

  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-about .about-hero__stat {
    min-height: 120px;
  }

  .page-about .about-story__grid {
    grid-template-columns: 1.4fr 0.6fr;
    align-items: start;
  }

  .page-about .about-capability__cards {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-about .about-capability__bottom {
    grid-template-columns: 1fr 1.2fr;
    align-items: center;
  }

  .page-about .about-team__grid {
    grid-template-columns: 1fr 1.15fr;
    gap: 56px;
  }
}

@media (min-width: 900px) {
  .page-about .about-milestone__track {
    padding: 56px 0 24px;
  }

  .page-about .about-milestone__line {
    left: 50%;
    transform: translateX(-50%);
    width: 48px;
  }

  .page-about .about-milestone__node {
    width: calc(50% - 46px);
    padding-left: 0;
    margin-bottom: 64px;
    text-align: right;
  }

  .page-about .about-milestone__node:nth-of-type(odd) {
    margin-right: auto;
    margin-left: 0;
  }

  .page-about .about-milestone__node:nth-of-type(even) {
    margin-left: auto;
    margin-right: 0;
    text-align: left;
  }

  .page-about .about-milestone__node .about-milestone__dot {
    left: calc(50% - 8px);
    right: auto;
  }
}

@media (min-width: 1080px) {
  .page-about .about-credential__grid {
    grid-template-columns: 1fr 1fr;
    gap: 70px;
    align-items: center;
  }

  .page-about .about-partner__grid {
    grid-template-columns: 1fr 1fr;
    gap: 28px;
  }

  .page-about .about-cta__inner {
    grid-template-columns: 1.4fr 1fr;
    padding: 56px 60px;
  }

  .page-about .about-cta__privacy {
    grid-column: 1 / -1;
  }
}