:root {
  --ink: #18212f;
  --muted: #657184;
  --paper: #ffffff;
  --soft: #f5f7fb;
  --line: #dce3ee;
  --gold: #ffad00;
  --gold-dark: #c87b00;
  --rose: #c62e6b;
  --cyan: #00a8c7;
  --green: #35a66f;
  --deep: #171b2a;
  --shadow: 0 22px 70px rgba(19, 31, 49, 0.16);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: Arial, "Microsoft YaHei", "PingFang SC", sans-serif;
  background:
    linear-gradient(180deg, rgba(247, 249, 253, 0.9), rgba(255, 255, 255, 0) 28rem),
    var(--paper);
  letter-spacing: 0;
}

a {
  color: inherit;
  text-decoration: none;
}

.site-header {
  position: fixed;
  z-index: 20;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 82px;
  padding: 16px clamp(18px, 5vw, 72px);
  color: #fff;
  background: rgba(13, 18, 31, 0.7);
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: 0 12px 38px rgba(8, 12, 22, 0.2);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
  font-weight: 700;
  font-size: 17px;
}

.brand img {
  width: 46px;
  height: 46px;
  border-radius: 8px;
  object-fit: cover;
  background: #fff;
  box-shadow: 0 8px 22px rgba(0, 0, 0, 0.2);
}

.brand span {
  white-space: nowrap;
}

.nav {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.06);
}

.nav a {
  padding: 10px 16px;
  border-radius: 6px;
  color: rgba(255, 255, 255, 0.82);
  font-size: 15px;
}

.nav a:hover,
.nav .active {
  color: #fff;
  background: rgba(255, 173, 0, 0.18);
}

.hero {
  position: relative;
  min-height: 86vh;
  display: grid;
  align-items: center;
  overflow: hidden;
  color: #fff;
  background-image: url("./images/hero-reference.jpg");
  background-position: center;
  background-size: cover;
}

.hero-about {
  min-height: 62vh;
}

.hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 150px;
  background: linear-gradient(to bottom, rgba(255, 255, 255, 0), #f9fbfe 88%, #fff);
}

.hero-shade {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(120deg, rgba(15, 20, 34, 0.96), rgba(72, 31, 68, 0.82) 45%, rgba(186, 95, 22, 0.56)),
    radial-gradient(circle at 72% 34%, rgba(0, 188, 212, 0.38), rgba(0, 0, 0, 0) 35%);
}

.hero-inner {
  position: relative;
  z-index: 1;
  width: min(1060px, calc(100% - 36px));
  margin: 0 auto;
  padding-top: 64px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.98fr) minmax(390px, 0.82fr);
  gap: clamp(30px, 6vw, 70px);
  align-items: center;
}

.hero-content {
  min-width: 0;
}

.hero-inner.compact {
  width: min(920px, calc(100% - 36px));
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--gold);
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 830px;
  margin-bottom: 22px;
  font-size: clamp(42px, 6vw, 70px);
  line-height: 1.08;
  text-shadow: 0 20px 46px rgba(0, 0, 0, 0.3);
}

h2 {
  margin-bottom: 16px;
  font-size: clamp(30px, 4vw, 46px);
  line-height: 1.18;
}

h3 {
  margin-bottom: 12px;
  font-size: 22px;
}

.hero-copy {
  max-width: 690px;
  margin-bottom: 34px;
  color: rgba(255, 255, 255, 0.84);
  font-size: 19px;
  line-height: 1.8;
}

.hero-product {
  position: relative;
  z-index: 1;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.12);
  box-shadow: 0 28px 80px rgba(0, 0, 0, 0.34);
  backdrop-filter: blur(18px);
  transform: translateY(22px);
}

.hero-product::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.18), rgba(255, 255, 255, 0.03));
  pointer-events: none;
}

.product-top {
  position: relative;
  display: flex;
  gap: 8px;
  padding: 16px 18px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.16);
}

.product-top span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.42);
}

.product-body {
  position: relative;
  display: grid;
  grid-template-columns: 0.8fr 1.35fr;
  min-height: 378px;
}

.product-body aside {
  padding: 26px 20px;
  border-right: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(9, 13, 24, 0.22);
}

.product-body aside b {
  display: block;
  margin-bottom: 22px;
}

.product-body aside i {
  display: block;
  height: 12px;
  margin: 16px 0;
  border-radius: 99px;
  background: rgba(255, 255, 255, 0.2);
}

.product-body aside i:nth-child(3) {
  width: 72%;
}

.product-body aside i:nth-child(4) {
  width: 54%;
}

.product-body article {
  padding: 34px 30px;
}

.product-body small {
  color: var(--gold);
  font-weight: 700;
}

.product-body h2 {
  margin: 14px 0 18px;
  color: #fff;
  font-size: 30px;
}

.product-body p {
  color: rgba(255, 255, 255, 0.76);
  line-height: 1.9;
}

.product-note {
  margin-top: 28px;
  padding: 16px;
  border-radius: 8px;
  color: #251b08;
  background: linear-gradient(135deg, rgba(255, 173, 0, 0.96), rgba(255, 215, 117, 0.96));
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 28px;
  border-radius: 4px;
  font-weight: 700;
}

.btn.primary {
  color: #1e2331;
  background: linear-gradient(135deg, #ffc743, var(--gold));
  box-shadow: 0 16px 34px rgba(255, 173, 0, 0.32);
}

.btn.ghost {
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.46);
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(10px);
}

.section {
  width: min(1120px, calc(100% - 36px));
  margin: 0 auto;
  padding: 88px 0;
}

.intro {
  margin-top: -18px;
}

.section-heading {
  width: min(780px, 100%);
  margin: 0 auto 44px;
  text-align: center;
}

.section-heading.left {
  margin-left: 0;
  text-align: left;
}

.section-heading p,
.about-grid p,
.value-band p,
.contact-list p,
.timeline-list p,
.feature p {
  color: var(--muted);
  font-size: 16px;
  line-height: 1.8;
}

.workspace-visual {
  display: grid;
  grid-template-columns: 0.85fr 1.45fr 0.9fr;
  gap: 16px;
  position: relative;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background:
    radial-gradient(circle at 16% 10%, rgba(255, 173, 0, 0.16), transparent 28%),
    radial-gradient(circle at 88% 18%, rgba(0, 168, 199, 0.12), transparent 30%),
    linear-gradient(180deg, #ffffff, #f7f9fd);
  box-shadow: var(--shadow);
}

.panel {
  min-height: 360px;
  padding: 22px;
  border: 1px solid #e6ebf3;
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 18px 42px rgba(18, 31, 49, 0.06);
}

.dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  margin-right: 6px;
  border-radius: 50%;
}

.red { background: #e85d75; }
.amber { background: #f5b84b; }
.green { background: #51bd79; }

.line {
  height: 9px;
  margin: 13px 0;
  border-radius: 99px;
  background: #e9eef6;
}

.line.wide { width: 92%; }
.line.medium { width: 72%; }
.line.short { width: 48%; }

.chapter {
  margin-top: 12px;
  padding: 13px 14px;
  color: #596578;
  border-radius: 6px;
  background: #f4f7fb;
}

.chapter.active {
  color: #1f2938;
  background: rgba(255, 173, 0, 0.22);
}

.editor-toolbar {
  display: flex;
  gap: 10px;
  margin-bottom: 26px;
}

.editor-toolbar span {
  width: 48px;
  height: 8px;
  border-radius: 99px;
  background: #d8e1ed;
}

.editor p {
  color: #435064;
  font-size: 18px;
  line-height: 1.95;
}

.suggestion {
  margin-top: 26px;
  padding: 18px;
  color: #273140;
  border-left: 4px solid var(--gold);
  background: #fff8e6;
}

.metric {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: 22px 0 10px;
  color: #4b5668;
}

.bar {
  height: 9px;
  overflow: hidden;
  border-radius: 99px;
  background: #e7edf5;
}

.bar i {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: var(--rose);
}

.bar.teal i {
  background: var(--cyan);
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 28px;
}

.tag-list span {
  padding: 8px 12px;
  border-radius: 4px;
  color: #236071;
  background: #e5f7fb;
  font-weight: 700;
  font-size: 13px;
}

.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature {
  position: relative;
  overflow: hidden;
  padding: 30px;
  border-top: 3px solid var(--gold);
  background: var(--soft);
  border-radius: 8px;
  box-shadow: 0 14px 36px rgba(18, 31, 49, 0.08);
}

.feature::after {
  content: "";
  position: absolute;
  right: -46px;
  bottom: -46px;
  width: 118px;
  height: 118px;
  border-radius: 50%;
  border: 28px solid rgba(255, 173, 0, 0.14);
}

.feature-icon {
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  margin-bottom: 24px;
  color: #fff;
  background: var(--deep);
  border-radius: 8px;
  font-weight: 700;
}

.value-band,
.contact-strip {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 44px;
  align-items: center;
  width: 100%;
  padding: 72px max(18px, calc((100vw - 1120px) / 2));
  background:
    linear-gradient(135deg, rgba(198, 46, 107, 0.28), rgba(0, 168, 199, 0.12)),
    #181d2c;
  color: #fff;
}

.value-band p,
.contact-strip p {
  color: rgba(255, 255, 255, 0.78);
}

.about-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 54px;
  align-items: center;
}

.quote-card {
  padding: 44px;
  border-radius: 8px;
  color: #fff;
  background: linear-gradient(135deg, #1d2435, #6d244f 55%, #b07914);
  box-shadow: var(--shadow);
}

.reveal-panel {
  padding: 56px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 8px;
  background: rgba(12, 17, 30, 0.32);
  backdrop-filter: blur(12px);
}

.quote-card span {
  color: var(--gold);
  font-weight: 700;
}

.quote-card p {
  margin: 18px 0 0;
  color: #fff;
  font-size: 34px;
  line-height: 1.35;
  font-weight: 700;
}

.timeline-list {
  display: grid;
  gap: 18px;
}

.timeline-list div {
  padding: 26px 28px;
  border-left: 4px solid var(--gold);
  border-radius: 8px;
  background: var(--soft);
}

.timeline-list strong,
.contact-list strong {
  display: block;
  margin-bottom: 6px;
  color: var(--ink);
  font-size: 18px;
}

.contact-list {
  display: grid;
  gap: 14px;
}

.contact-list strong {
  color: #fff;
}

.contact-list p {
  margin: 0;
}

.site-footer {
  padding: 38px clamp(18px, 5vw, 72px);
  color: rgba(255, 255, 255, 0.78);
  background: #111624;
  text-align: center;
  line-height: 1.9;
}

.site-footer strong {
  display: block;
  margin-bottom: 10px;
  color: #fff;
  font-size: 18px;
}

.site-footer p {
  margin: 4px 0;
  font-size: 14px;
}

.site-footer a {
  color: var(--gold);
}

@media (max-width: 1180px) {
  .hero {
    min-height: 920px;
    align-items: start;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    padding-top: 180px;
  }

  .hero-content {
    max-width: 850px;
  }

  .hero-product {
    width: min(640px, 100%);
    transform: none;
  }

  h1 {
    max-width: 820px;
    font-size: 56px;
  }
}

@media (max-width: 900px) {
  .site-header {
    align-items: center;
    gap: 12px;
  }

  .brand span {
    white-space: nowrap;
  }

  .hero {
    min-height: 940px;
  }

  .workspace-visual,
  .features,
  .value-band,
  .about-grid,
  .contact-strip {
    grid-template-columns: 1fr;
  }

  .panel {
    min-height: auto;
  }
}

@media (max-width: 560px) {
  .site-header {
    position: absolute;
    align-items: flex-start;
    flex-direction: column;
    padding: 14px 18px;
  }

  .brand span {
    white-space: normal;
  }

  .nav {
    width: 100%;
  }

  .nav a {
    flex: 1;
    text-align: center;
  }

  h1 {
    font-size: 36px;
  }

  .hero {
    min-height: 760px;
  }

  .hero-grid {
    padding-top: 190px;
  }

  .hero-product {
    display: none;
  }

  .reveal-panel {
    padding: 0;
    border: 0;
    background: transparent;
    backdrop-filter: none;
  }

  .hero-copy {
    font-size: 17px;
  }

  .section {
    padding: 66px 0;
  }

  .workspace-visual {
    padding: 10px;
  }

  .feature {
    padding: 24px;
  }

  .quote-card {
    padding: 30px;
  }

  .quote-card p {
    font-size: 28px;
  }
}