:root {
  --navy: #16284a;
  --navy-text: #1f3054;
  --navy-deep: #0d1a35;
  --gray-band: #efeff0;
  --pill-border: #b9c2d0;
  --rule: #e6e6e8;
  --submit: #1b2a5e;
  --green: #1f9d55;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Helvetica Neue", Helvetica, Arial, "PingFang SC",
    "Microsoft YaHei", sans-serif;
  color: var(--navy-text);
  background: #fff;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  width: 100%;
  background: #fdfdfd;
  border-bottom: 1px solid #f0f0f0;
}
.header-inner {
  width: 100%;
  max-width: none;
  margin: 0;
  min-height: 92px;
  padding: 0 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  flex-shrink: 0;
}
/* 对齐 https://www.sequoiacapital.online/enitapu 页头 logo 尺寸与叠放 */
.logo-sequoia {
  display: block;
  width: 80px;
  height: 75px;
  object-fit: contain;
  flex-shrink: 0;
  position: relative;
  z-index: 1;
}
.logo-hsg-wrap {
  width: 76px;
  height: 76px;
  margin-left: -4px;
  border-radius: 50%;
  overflow: hidden;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  z-index: 2;
  box-shadow: 0 0 16px rgba(0, 0, 0, 0.2);
}
.logo-hsg {
  display: block;
  width: 64px;
  height: 64px;
  border-radius: 50%;
  object-fit: cover;
  object-position: center;
}
.nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  flex: 0 0 auto;
  gap: 14px;
}
.nav a {
  text-decoration: none;
  color: var(--navy);
  font-size: 13px;
  letter-spacing: 1px;
  padding: 11px 22px;
  border: 1px solid var(--pill-border);
  border-radius: 24px;
  white-space: nowrap;
  transition: background 0.2s, color 0.2s;
}
.nav a:hover {
  background: var(--navy);
  color: #fff;
  border-color: var(--navy);
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 700px;
  overflow: hidden;
  display: flex;
  align-items: center;
  background-image: url("images/hero.jpg");
  background-size: cover;
  background-position: center right;
}
/* decorative CSS layers no longer needed with real image */
.hero-map,
.hero-chart,
.hero-city,
.hero-glow {
  display: none;
}
.hero-overlay {
  position: relative;
  z-index: 3;
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 48px 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 36px;
}
.hero-map {
  position: absolute;
  inset: 0;
  background-image: radial-gradient(
    rgba(120, 160, 220, 0.35) 1px,
    transparent 1.4px
  );
  background-size: 10px 10px;
  -webkit-mask-image: linear-gradient(100deg, #000 0%, #000 55%, transparent 78%);
  mask-image: linear-gradient(100deg, #000 0%, #000 55%, transparent 78%);
  opacity: 0.55;
}
.hero-chart {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 62%;
  height: 70%;
  background-image: repeating-linear-gradient(
    to right,
    rgba(200, 170, 110, 0.18) 0 2px,
    transparent 2px 26px
  );
  -webkit-mask-image: linear-gradient(to top, #000, transparent 85%);
  mask-image: linear-gradient(to top, #000, transparent 85%);
  opacity: 0.5;
}
.hero-city {
  position: absolute;
  right: 0;
  bottom: 0;
  width: 55%;
  height: 100%;
  background: linear-gradient(
    250deg,
    rgba(255, 214, 150, 0.5) 0%,
    rgba(120, 140, 180, 0.15) 35%,
    transparent 60%
  );
}
.hero-city::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  width: 100%;
  height: 42%;
  background: repeating-linear-gradient(
      to right,
      rgba(10, 20, 40, 0.85) 0 6px,
      rgba(20, 35, 65, 0.55) 6px 10px,
      transparent 10px 34px
    ),
    repeating-linear-gradient(
      to right,
      transparent 0 18px,
      rgba(8, 16, 34, 0.9) 18px 22px,
      transparent 22px 50px
    );
  -webkit-mask-image: linear-gradient(to top, #000 35%, transparent);
  mask-image: linear-gradient(to top, #000 35%, transparent);
}
.hero-glow {
  position: absolute;
  right: 12%;
  top: 8%;
  width: 320px;
  height: 320px;
  background: radial-gradient(
    circle,
    rgba(255, 224, 170, 0.55),
    transparent 65%
  );
  filter: blur(6px);
}

/* ---------- Bio band ---------- */
.bio {
  background: var(--gray-band);
  padding: 66px 24px;
  text-align: center;
}
.bio p {
  max-width: 640px;
  margin: 0 auto;
  color: var(--navy-text);
  font-size: 15.5px;
}

/* ---------- Person intro (overlaid on hero) ---------- */
.intro-photo {
  flex-shrink: 0;
}
.intro-photo img {
  width: 390px;
  height: 390px;
  border-radius: 50%;
  object-fit: cover;
  border: 4px solid rgba(255, 255, 255, 0.9);
  box-shadow: 0 12px 34px rgba(0, 0, 0, 0.35);
}
.intro-card {
  width: 480px;
  flex-shrink: 0;
  background: rgba(244, 245, 247, 0.95);
  padding: 34px 38px;
  box-shadow: 0 14px 40px rgba(0, 0, 0, 0.3);
}
.intro-name {
  font-size: 33px;
  font-weight: 400;
  color: var(--navy);
}
.intro-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 22px;
}
.intro-cols {
  display: flex;
  gap: 44px;
}
.intro-block {
  margin-bottom: 18px;
}
.intro-block h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 8px;
}
.intro-block p {
  font-size: 15px;
  color: var(--navy-text);
  margin: 2px 0;
}
.intro-block a {
  color: var(--navy-text);
  text-decoration: underline;
}

/* ---------- Biography band ---------- */
.bio-bar {
  max-width: 820px;
  margin: 0 auto 40px;
  background: var(--submit);
  color: #fff;
  text-align: center;
  font-size: 19px;
  padding: 14px;
  letter-spacing: 0.5px;
}

/* ---------- Clients ---------- */
.clients-label {
  text-align: center;
  font-size: 13px;
  letter-spacing: 2px;
  color: #6a778c;
  margin-bottom: 40px;
}
.clients {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 32px 56px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 16px 8px;
}
.client {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 0;
}
.client img {
  display: block;
  height: 80px;
  width: auto;
  max-width: 280px;
  object-fit: contain;
}
.client b {
  display: none;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.5px;
  color: #2a3a52;
  opacity: 0.75;
}
.client img.is-error {
  display: none;
}
.client img.is-error + b {
  display: inline;
}

/* ---------- Sections ---------- */
.section {
  padding: 64px 24px;
  max-width: 1080px;
  margin: 0 auto;
}
.section-heading {
  text-align: center;
  font-size: 18px;
  font-weight: 600;
  letter-spacing: 5px;
  color: var(--navy);
  text-transform: uppercase;
}
.rule {
  border: none;
  border-top: 1px solid var(--rule);
  margin: 28px 0 36px;
}
.section-lead {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 44px;
  color: var(--navy-text);
  font-size: 15px;
}

/* ---------- Education ---------- */
.edu-list {
  display: flex;
  flex-direction: column;
  gap: 40px;
  max-width: 720px;
  margin: 0 auto;
}
.edu-item {
  display: flex;
  align-items: center;
  gap: 32px;
}
.edu-item img {
  width: 96px;
  height: 96px;
  object-fit: contain;
  flex-shrink: 0;
}
.edu-text h3 {
  font-size: 18px;
  color: var(--navy);
  font-weight: 600;
  margin-bottom: 6px;
}
.edu-text p {
  font-size: 14px;
  color: var(--navy-text);
  margin-bottom: 10px;
}
.degree {
  display: inline-block;
  font-size: 11px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: #fff;
  background: var(--navy);
  padding: 4px 12px;
  border-radius: 3px;
}

/* ---------- Experience timeline ---------- */
.section-experience {
  max-width: 1000px;
}
.timeline {
  position: relative;
  margin-top: 40px;
  padding: 20px 0;
}
.tl-line {
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 1px;
  background: var(--rule);
  transform: translateX(-50%);
}
.tl-period {
  position: relative;
  width: max-content;
  margin: 24px auto 32px;
  background: var(--navy);
  color: #fff;
  font-size: 12px;
  letter-spacing: 2px;
  padding: 7px 20px;
  border-radius: 20px;
  z-index: 2;
}
.tl-row {
  position: relative;
  display: flex;
  margin-bottom: 30px;
}
.tl-row.left {
  justify-content: flex-start;
}
.tl-row.right {
  justify-content: flex-end;
}
.tl-card {
  position: relative;
  width: 46%;
  background: #fff;
  border: 1px solid var(--rule);
  border-radius: 6px;
  padding: 20px 24px;
  box-shadow: 0 6px 18px rgba(20, 40, 74, 0.05);
}
.tl-card::before {
  content: "";
  position: absolute;
  top: 26px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--navy);
}
.tl-row.left .tl-card::before {
  right: -6.5%;
}
.tl-row.right .tl-card::before {
  left: -6.5%;
}
.tl-card h3 {
  font-size: 15px;
  letter-spacing: 1px;
  color: var(--navy);
  font-weight: 700;
}
.tl-card .sub {
  font-size: 12px;
  color: #6a778c;
  margin-top: 2px;
}
.tl-card .role {
  display: inline-block;
  color: var(--green);
  font-style: italic;
  font-size: 14px;
  margin-top: 4px;
}
.tl-card.feature p {
  font-size: 13.5px;
  color: var(--navy-text);
  margin-top: 12px;
}

/* ---------- Contact ---------- */
.contact {
  background: var(--gray-band);
  max-width: none;
  margin: 0;
  padding: 64px 24px 72px;
}
.contact .section-heading {
  margin-bottom: 44px;
}
.contact-grid {
  max-width: 940px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: 60px;
  align-items: start;
}
.contact-form {
  width: 100%;
}
.contact-info {
  padding-top: 6px;
}
.contact-email {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--navy-text);
  text-decoration: underline;
  font-size: 15px;
}
.mail-icon {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: #cfd6df;
  color: var(--navy);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  text-decoration: none;
  flex-shrink: 0;
}
.contact-divider {
  border: none;
  border-top: 1px solid #c9cfd8;
  margin: 20px 0;
}
.contact-person strong {
  display: block;
  font-size: 18px;
  color: var(--navy);
  font-weight: 700;
}
.contact-person span {
  font-size: 12px;
  letter-spacing: 0.5px;
  color: #6a778c;
}
.form-row {
  display: flex;
  gap: 22px;
  margin-bottom: 22px;
}
.contact-form label {
  flex: 1;
  font-size: 12px;
  color: var(--navy-text);
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.contact-form input {
  border: 1px solid var(--navy);
  background: #fff;
  padding: 10px 12px;
  font-size: 16px;
  color: var(--navy-text);
  outline: none;
  border-radius: 0;
}
.contact-form input:focus {
  border-color: var(--submit);
  box-shadow: 0 0 0 1px var(--submit);
}
.contact-form label {
  gap: 8px;
}
.phone-field {
  display: flex;
  align-items: stretch;
}
.country-code {
  position: relative;
  flex: 0 0 auto;
}
/* 整个手机号是一个外框：左侧区号选择 + 右侧号码输入 */
.phone-field {
  position: relative;
  border: 1px solid var(--navy);
  background: #fff;
}
/* 只有号码输入框聚焦时才加粗外框；打开下拉搜索时外框保持原样 */
.phone-field:has(> input[type="tel"]:focus),
.phone-field:has(.cc-trigger:focus-visible) {
  border-color: var(--submit);
  box-shadow: 0 0 0 1px var(--submit);
}
.contact-form .cc-search:focus,
.contact-form .phone-field > input[type="tel"]:focus {
  border: none;
  box-shadow: none;
}
.cc-trigger {
  display: flex;
  align-items: center;
  gap: 8px;
  height: 100%;
  box-sizing: border-box;
  border: none;
  background: transparent;
  padding: 0 4px 0 14px;
  font-family: inherit;
  font-size: 16px;
  line-height: 1;
  color: var(--navy);
  cursor: pointer;
}
.cc-trigger:focus {
  outline: none;
}
.cc-trigger .cc-flag {
  display: inline-flex;
  align-items: center;
}
.cc-trigger .cc-flag img {
  width: 22px;
  height: 14px;
  object-fit: cover;
  display: block;
}
.cc-dial {
  font-size: 16px;
  color: var(--navy-text);
}
.cc-dial:empty {
  display: none;
}
.cc-caret {
  color: var(--navy);
  transition: transform 0.15s ease;
}
.country-code.open .cc-caret {
  transform: rotate(180deg);
}
/* 号码输入框在外框内，不再单独画边框 */
.contact-form .phone-field > input[type="tel"] {
  flex: 1 1 0;
  width: 0;
  min-width: 0;
  border: none;
  box-shadow: none;
  background: transparent;
}

/* 弹出面板 */
.cc-panel {
  position: absolute;
  left: -1px;
  width: 282px;
  max-width: calc(100vw - 32px);
  box-sizing: border-box;
  background: #fff;
  border: 1px solid #a8a8ad;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.18);
  z-index: 60;
  display: flex;
  flex-direction: column;
}
.cc-panel[hidden] {
  display: none;
}
.cc-panel.up {
  bottom: calc(100% + 1px);
}
.cc-panel.down {
  top: calc(100% + 1px);
}
.cc-search-wrap {
  padding: 20px 24px 8px;
  background: #fff;
}
.cc-search-box {
  display: flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--navy);
  padding: 0 14px;
  height: 42px;
  box-sizing: border-box;
  cursor: text;
}
.cc-search-icon {
  flex: 0 0 auto;
  color: var(--navy);
}
.contact-form .cc-search {
  flex: 1;
  min-width: 0;
  border: none;
  box-shadow: none;
  outline: none;
  background: transparent;
  font-family: inherit;
  font-size: 16px;
  color: var(--navy-text);
  padding: 0;
}
.cc-search::placeholder {
  color: var(--navy-text);
}
.cc-list {
  list-style: none;
  margin: 0;
  padding: 0;
  max-height: 198px;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: #8a8a8f #f7f7f7;
}
.cc-list::-webkit-scrollbar {
  width: 16px;
}
.cc-list::-webkit-scrollbar-track {
  background: #f7f7f7;
  border-left: 1px solid #e3e3e3;
}
.cc-list::-webkit-scrollbar-thumb {
  background: #8a8a8f;
  border-radius: 8px;
  border: 4px solid #f7f7f7;
  min-height: 24px;
}
.cc-item {
  display: flex;
  align-items: center;
  gap: 12px;
  height: 39px;
  padding: 0 24px;
  cursor: pointer;
  font-size: 14px;
  color: var(--navy-text);
  white-space: nowrap;
}
.cc-item[hidden],
.cc-list[hidden],
.cc-empty[hidden] {
  display: none;
}
.cc-item:hover,
.cc-item.active {
  background: #f2f2f2;
}
.cc-item[aria-selected="true"] {
  font-weight: 600;
}
.cc-i-flag {
  flex: 0 0 auto;
  width: 22px;
  height: 14px;
  object-fit: cover;
  box-shadow: 0 0 0 0.5px rgba(0, 0, 0, 0.08);
}
.cc-i-text {
  overflow: hidden;
  text-overflow: ellipsis;
}
.cc-empty {
  padding: 12px 24px 18px;
  color: #6a778c;
  font-size: 14px;
}
.submit-btn {
  width: 100%;
  margin-top: 10px;
  background: var(--submit);
  color: #fff;
  border: none;
  padding: 13px;
  font-size: 13px;
  letter-spacing: 1px;
  cursor: pointer;
  border-radius: 2px;
  transition: background 0.2s;
}
.submit-btn:hover {
  background: #12204a;
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--gray-band);
  text-align: center;
  padding: 22px;
  border-top: 1px solid #e4e4e6;
}
.site-footer p {
  font-size: 12px;
  color: #7a8091;
}

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .nav a {
    padding: 7px 12px;
    font-size: 11px;
    letter-spacing: 0.5px;
  }
  .hero-overlay {
    flex-direction: column;
    gap: 28px;
  }
  .intro-photo img {
    width: 265px;
    height: 265px;
  }
  .intro-card {
    width: 100%;
    max-width: 480px;
    margin: 0 auto;
  }
}
@media (max-width: 640px) {
  .nav {
    display: none;
  }
  .hero-overlay {
    flex-direction: column;
    padding: 32px 20px;
  }
  .intro-card {
    width: 100%;
  }
  .edu-item {
    flex-direction: column;
    text-align: center;
    gap: 16px;
  }
  .tl-line {
    left: 18px;
  }
  .tl-period {
    margin-left: 0;
  }
  .tl-row.left,
  .tl-row.right {
    justify-content: flex-start;
  }
  .tl-card {
    width: 100%;
    margin-left: 40px;
  }
  .tl-row.left .tl-card::before,
  .tl-row.right .tl-card::before {
    left: -46px;
  }
  .form-row {
    flex-direction: column;
    gap: 22px;
  }
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}