:root {
  --ink: #0a2230;
  --ink-soft: #3a5566;
  --paper: #f3f8fa;
  --sky-top: #9ed8f0;
  --sky-mid: #d7eef8;
  --sky-low: #fff4e8;
  --sun: #ff9a4a;
  --sun-deep: #e86a1f;
  --track: #14918a;
  --track-deep: #0d6b66;
  --line: rgba(10, 34, 48, 0.12);
  --white: #ffffff;
  --shadow: 0 18px 50px rgba(10, 34, 48, 0.12);
  --radius: 18px;
  --font-display: "ZCOOL QingKe HuangYou", "Outfit", sans-serif;
  --font-heading: "Noto Sans SC", "Outfit", sans-serif;
  --font-body: "Noto Sans SC", "Outfit", sans-serif;
  --max: 1080px;
  --footer-h: 3rem;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  padding-bottom: var(--footer-h);
  color: var(--ink);
  font-family: var(--font-body);
  background:
    radial-gradient(ellipse 80% 50% at 80% -10%, rgba(255, 154, 74, 0.28), transparent 55%),
    radial-gradient(ellipse 70% 45% at 10% 0%, rgba(20, 145, 138, 0.18), transparent 50%),
    linear-gradient(180deg, var(--sky-top) 0%, var(--sky-mid) 28%, var(--sky-low) 62%, var(--paper) 100%);
  background-attachment: fixed;
  line-height: 1.6;
}

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

img {
  max-width: 100%;
  display: block;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(14px);
  background: rgba(243, 248, 250, 0.72);
  border-bottom: 1px solid var(--line);
}

.nav {
  width: min(100% - 2rem, var(--max));
  margin: 0 auto;
  min-height: 4rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-heading);
  font-size: clamp(0.82rem, 2.2vw, 1.05rem);
  font-weight: 600;
  letter-spacing: 0.01em;
  line-height: 1.25;
  max-width: min(72vw, 22rem);
}

.brand-mark {
  width: 2.2rem;
  height: 2.2rem;
  border-radius: 50%;
  background: linear-gradient(145deg, var(--sun), var(--track));
  display: grid;
  place-items: center;
  box-shadow: 0 6px 16px rgba(232, 106, 31, 0.28);
  overflow: hidden;
}

.brand-mark img {
  width: 1.45rem;
  height: 1.45rem;
  animation: jog 0.45s steps(2) infinite;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  padding: 0.45rem 0.85rem;
  border-radius: 999px;
  color: var(--ink-soft);
  font-size: 0.95rem;
  transition: background 0.2s ease, color 0.2s ease;
}

.nav-links a:hover,
.nav-links a.is-active {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.7);
}

.nav-toggle {
  display: none;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.8);
  border-radius: 10px;
  width: 2.5rem;
  height: 2.5rem;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 1rem;
  height: 2px;
  margin: 0.22rem auto;
  background: var(--ink);
}

.hero {
  width: min(100% - 2rem, var(--max));
  margin: 0 auto;
  min-height: calc(100vh - 4rem - var(--footer-h));
  display: grid;
  align-content: center;
  gap: 1.4rem;
  padding: 2.5rem 0 3.5rem;
  position: relative;
  overflow: hidden;
}

.hero-brand {
  font-family: var(--font-display);
  font-size: clamp(3.2rem, 10vw, 6.2rem);
  line-height: 0.95;
  letter-spacing: 0.04em;
  margin: 0;
  position: relative;
  z-index: 2;
}

.hero-title {
  margin: 0;
  max-width: 18ch;
  font-family: var(--font-heading);
  font-size: clamp(1.35rem, 3.4vw, 2rem);
  font-weight: 600;
  line-height: 1.35;
  position: relative;
  z-index: 2;
}

.hero-lead {
  margin: 0;
  max-width: 34ch;
  color: var(--ink-soft);
  font-size: 1.05rem;
  position: relative;
  z-index: 2;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  position: relative;
  z-index: 2;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  min-height: 2.85rem;
  padding: 0.65rem 1.25rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-family: var(--font-body);
  font-size: 0.98rem;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  color: var(--white);
  background: linear-gradient(120deg, var(--sun-deep), var(--sun) 45%, var(--track));
  box-shadow: 0 10px 28px rgba(232, 106, 31, 0.28);
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.72);
  border-color: var(--line);
  color: var(--ink);
}

.runner-stage {
  position: absolute;
  right: -2%;
  bottom: 8%;
  width: min(52vw, 420px);
  aspect-ratio: 1.2;
  pointer-events: none;
  z-index: 1;
}

.runner-path {
  position: absolute;
  left: 8%;
  right: 4%;
  bottom: 18%;
  height: 10px;
  border-radius: 999px;
  background: linear-gradient(90deg, transparent, rgba(20, 145, 138, 0.35), rgba(255, 154, 74, 0.45));
  transform: skewX(-18deg);
}

.runner {
  position: absolute;
  left: 12%;
  bottom: 22%;
  width: 118px;
  height: 118px;
  animation: dash 4.8s ease-in-out infinite;
}

.runner img {
  width: 100%;
  height: 100%;
  filter: drop-shadow(0 12px 18px rgba(10, 34, 48, 0.18));
  animation: jog 0.36s steps(2) infinite;
}

.speed-lines {
  position: absolute;
  left: 0;
  top: 28%;
  width: 70%;
  height: 40%;
  opacity: 0.55;
  background:
    linear-gradient(90deg, transparent 0%, rgba(10, 34, 48, 0.18) 40%, transparent 70%) 0 20%/100% 2px no-repeat,
    linear-gradient(90deg, transparent 10%, rgba(10, 34, 48, 0.14) 50%, transparent 80%) 0 50%/100% 2px no-repeat,
    linear-gradient(90deg, transparent 0%, rgba(10, 34, 48, 0.1) 45%, transparent 75%) 0 78%/100% 2px no-repeat;
  animation: whoosh 1.1s linear infinite;
}

.section {
  width: min(100% - 2rem, var(--max));
  margin: 0 auto;
  padding: 3.5rem 0;
}

.section-head {
  max-width: 40rem;
  margin-bottom: 1.8rem;
}

.section-head h2 {
  margin: 0 0 0.5rem;
  font-family: var(--font-heading);
  font-size: clamp(1.45rem, 3vw, 1.85rem);
  font-weight: 600;
  letter-spacing: 0.02em;
  line-height: 1.35;
}

.section-head p {
  margin: 0;
  color: var(--ink-soft);
}

.feature-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.feature {
  padding: 0.4rem 0.2rem 0.8rem;
  border-radius: 0;
  background: transparent;
  border: 0;
  border-top: 2px solid rgba(20, 145, 138, 0.35);
}

.feature h3 {
  margin: 0 0 0.4rem;
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 600;
}

.feature p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.product-intro {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 2rem;
  align-items: center;
}

.product-copy h1 {
  margin: 0 0 0.8rem;
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 6vw, 4rem);
  letter-spacing: 0.04em;
  line-height: 1;
}

.product-copy p {
  margin: 0 0 1rem;
  color: var(--ink-soft);
  max-width: 38ch;
}

.status-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin: 1.2rem 0 0;
}

.status-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.75);
  border: 1px solid var(--line);
  font-size: 0.85rem;
  color: var(--ink-soft);
}

.status-chip img {
  width: 1.4rem;
  height: 1.4rem;
}

.phone-frame {
  justify-self: center;
  width: min(100%, 280px);
  border-radius: 28px;
  padding: 0.55rem;
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.95), rgba(255, 255, 255, 0.55));
  box-shadow: var(--shadow);
  border: 1px solid rgba(255, 255, 255, 0.8);
}

.phone-frame--sm {
  width: min(100%, 240px);
}

.phone-frame img {
  width: 100%;
  border-radius: 22px;
}

.highlight-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem 1.75rem;
}

.highlight {
  display: grid;
  gap: 1.1rem;
  justify-items: center;
  text-align: center;
  padding: 0.35rem 0.5rem 0.8rem;
  border-top: 2px solid rgba(20, 145, 138, 0.35);
}

.highlight--dial {
  border-top-color: rgba(232, 106, 31, 0.45);
}

.highlight-copy h3 {
  margin: 0.85rem 0 0.4rem;
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 600;
}

.highlight-copy p {
  margin: 0 auto;
  color: var(--ink-soft);
  max-width: 28ch;
}

.highlight .phone-frame {
  justify-self: center;
}

.shot-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.shot {
  margin: 0;
}

.shot img {
  width: 100%;
  border-radius: 18px;
  box-shadow: var(--shadow);
  background: var(--white);
}

.shot figcaption {
  margin-top: 0.55rem;
  text-align: center;
  color: var(--ink-soft);
  font-size: 0.9rem;
}

.contact-layout {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 1.5rem;
  align-items: start;
}

.panel {
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.85);
  border-radius: var(--radius);
  padding: 1.4rem;
  box-shadow: 0 10px 30px rgba(10, 34, 48, 0.06);
}

.panel h1,
.panel h2 {
  margin: 0 0 0.8rem;
  font-family: var(--font-heading);
  font-weight: 600;
  letter-spacing: 0.02em;
}

.info-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.75rem;
}

.info-list li {
  display: grid;
  gap: 0.15rem;
}

.info-list span {
  color: var(--ink-soft);
  font-size: 0.85rem;
}

.info-list strong {
  font-weight: 600;
}

.info-list a {
  color: var(--track-deep);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.form {
  display: grid;
  gap: 0.9rem;
}

.form label {
  display: grid;
  gap: 0.35rem;
  font-size: 0.92rem;
}

.form input,
.form textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.75rem 0.85rem;
  font: inherit;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.9);
  outline: none;
}

.form input:focus,
.form textarea:focus {
  border-color: var(--track);
  box-shadow: 0 0 0 3px rgba(20, 145, 138, 0.15);
}

.form textarea {
  min-height: 8rem;
  resize: vertical;
}

.form-hint {
  margin: 0;
  min-height: 1.4em;
  font-size: 0.9rem;
  color: var(--ink-soft);
}

.form-hint.is-ok {
  color: var(--track-deep);
}

.form-hint.is-err {
  color: #b42318;
}

.iframe-slot {
  margin-top: 1rem;
  border-radius: 14px;
  overflow: hidden;
  border: 1px dashed var(--line);
  background: rgba(255, 255, 255, 0.45);
  min-height: 120px;
}

.iframe-slot iframe {
  width: 100%;
  min-height: 120px;
  border: 0;
  display: block;
}

.site-footer {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 50;
  height: var(--footer-h);
  margin: 0;
  padding: 0 1rem;
  box-sizing: border-box;
  border-top: 1px solid var(--line);
  background: rgba(243, 248, 250, 0.92);
  backdrop-filter: blur(12px);
  color: var(--ink-soft);
  font-size: 0.82rem;
  display: flex;
  flex-wrap: nowrap;
  align-items: center;
  justify-content: center;
  gap: 0.75rem 1.25rem;
  width: 100%;
}

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

@keyframes jog {
  from { transform: translateY(0); }
  to { transform: translateY(0); }
}

@keyframes dash {
  0% { transform: translateX(0); }
  50% { transform: translateX(58%); }
  100% { transform: translateX(0); }
}

@keyframes whoosh {
  from { transform: translateX(12px); opacity: 0.2; }
  to { transform: translateX(-28px); opacity: 0.55; }
}

@media (max-width: 860px) {
  .feature-strip,
  .shot-grid,
  .product-intro,
  .contact-layout,
  .highlight-grid {
    grid-template-columns: 1fr;
  }

  .runner-stage {
    width: min(70vw, 280px);
    opacity: 0.85;
    right: -6%;
    bottom: 2%;
  }

  .hero {
    min-height: auto;
    padding-top: 2rem;
    padding-bottom: 8rem;
  }
}

@media (max-width: 640px) {
  .nav-toggle {
    display: inline-block;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 4rem;
    right: 1rem;
    left: 1rem;
    flex-direction: column;
    align-items: stretch;
    padding: 0.6rem;
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.95);
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
  }

  .nav-links.is-open {
    display: flex;
  }

  .nav-links a {
    border-radius: 10px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .runner,
  .runner img,
  .brand-mark img,
  .speed-lines {
    animation: none;
  }
}