/* ========== Reset & Base ========== */
*,
*::before,
*::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --blue: #1677ff;
  --blue-600: #0958d9;
  --blue-50: #e6f4ff;
  --orange: #ff7a00;
  --orange-600: #d4610a;
  --orange-50: #fff7e6;
  --ink: #0f172a;
  --ink-2: #334155;
  --muted: #64748b;
  --line: #eef1f6;
  --bg: #ffffff;
  --bg-alt: #f7f9fc;
  --radius: 16px;
  --radius-lg: 24px;
  --shadow-sm: 0 2px 8px rgba(15, 23, 42, .06);
  --shadow-md: 0 12px 32px rgba(15, 23, 42, .08);
  --shadow-lg: 0 24px 60px rgba(22, 119, 255, .18);
  --maxw: 1180px;
  --ease: cubic-bezier(.4, 0, .2, 1);
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC',
    'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { display: block; max-width: 100%; }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

.grad-text {
  background: linear-gradient(90deg, var(--blue) 0%, var(--orange) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ========== Buttons ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: none;
  border-radius: 999px;
  font-weight: 600;
  cursor: pointer;
  transition: transform .2s var(--ease), box-shadow .2s var(--ease), background .2s var(--ease);
  white-space: nowrap;
}
.btn-ico { width: 18px; height: 18px; }
.btn-sm { padding: 9px 18px; font-size: 14px; }
.btn-lg { padding: 14px 28px; font-size: 16px; }
.btn-primary {
  background: linear-gradient(135deg, var(--blue) 0%, #4096ff 100%);
  color: #fff;
  box-shadow: 0 8px 24px rgba(22, 119, 255, .35);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(22, 119, 255, .45);
}
.btn-ghost {
  background: rgba(255, 255, 255, .8);
  color: var(--ink);
  border: 1.5px solid var(--line);
  backdrop-filter: blur(8px);
}
.btn-ghost:hover {
  border-color: var(--blue);
  color: var(--blue);
  transform: translateY(-2px);
}

/* ========== Header ========== */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  transition: all .3s var(--ease);
  background: rgba(255, 255, 255, .7);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid transparent;
}
.header.scrolled {
  background: rgba(255, 255, 255, .92);
  border-bottom-color: var(--line);
  box-shadow: var(--shadow-sm);
}
.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.brand-logo { height: 34px; width: auto; }
.nav { display: flex; gap: 36px; }
.nav a {
  font-size: 15px;
  font-weight: 500;
  color: var(--ink-2);
  position: relative;
  transition: color .2s;
}
.nav a::after {
  content: '';
  position: absolute;
  left: 0; bottom: -6px;
  width: 0; height: 2px;
  background: linear-gradient(90deg, var(--blue), var(--orange));
  border-radius: 2px;
  transition: width .25s var(--ease);
}
.nav a:hover { color: var(--blue); }
.nav a:hover::after { width: 100%; }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px; height: 36px;
  background: none;
  border: none;
  cursor: pointer;
}
.nav-toggle span {
  display: block;
  width: 24px; height: 2.5px;
  background: var(--ink);
  border-radius: 2px;
  transition: all .3s var(--ease);
}
.nav-toggle.active span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }

/* ========== Hero ========== */
.hero {
  position: relative;
  padding: 160px 0 100px;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
}
.blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: .55;
}
.blob-blue {
  width: 520px; height: 520px;
  background: radial-gradient(circle, rgba(22,119,255,.45), rgba(22,119,255,0) 70%);
  top: -120px; left: -100px;
}
.blob-orange {
  width: 480px; height: 480px;
  background: radial-gradient(circle, rgba(255,122,0,.4), rgba(255,122,0,0) 70%);
  bottom: -140px; right: -80px;
}
.grid-overlay {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(22,119,255,.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(22,119,255,.06) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse at center, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at center, #000 30%, transparent 75%);
}
.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  align-items: center;
  gap: 60px;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 16px;
  background: var(--blue-50);
  color: var(--blue-600);
  border-radius: 999px;
  font-size: 13.5px;
  font-weight: 600;
  margin-bottom: 24px;
}
.eyebrow .dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--blue);
  box-shadow: 0 0 0 4px rgba(22,119,255,.2);
}
.hero-title {
  font-size: clamp(34px, 4.6vw, 58px);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin-bottom: 22px;
}
.hero-sub {
  font-size: 18px;
  color: var(--muted);
  max-width: 540px;
  margin-bottom: 36px;
  line-height: 1.75;
}
.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}
.hero-meta {
  display: flex;
  align-items: center;
  gap: 28px;
  flex-wrap: wrap;
}
.meta-item strong {
  display: block;
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
}
.meta-item span {
  font-size: 13px;
  color: var(--muted);
}
.meta-divider {
  width: 1px; height: 32px;
  background: var(--line);
}

/* Hero Visual - Phone */
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
}
.phone {
  position: relative;
  width: 300px;
  height: 600px;
  background: linear-gradient(160deg, #1a1f2e, #0f1420);
  border-radius: 42px;
  padding: 14px;
  box-shadow: 0 40px 80px rgba(15, 23, 42, .3), 0 0 0 2px rgba(255,255,255,.1) inset;
  transform: rotate(-3deg);
  transition: transform .4s var(--ease);
}
.phone:hover { transform: rotate(0deg) translateY(-6px); }
.phone-notch {
  position: absolute;
  top: 14px; left: 50%;
  transform: translateX(-50%);
  width: 110px; height: 26px;
  background: #0f1420;
  border-radius: 0 0 16px 16px;
  z-index: 2;
}
.phone-screen {
  width: 100%; height: 100%;
  background: linear-gradient(180deg, #f0f5ff 0%, #fff 100%);
  border-radius: 30px;
  padding: 46px 16px 16px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.screen-top {
  text-align: center;
  margin-bottom: 18px;
}
.screen-greeting {
  display: block;
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
}
.screen-sub {
  display: block;
  font-size: 11.5px;
  color: var(--muted);
  margin-top: 3px;
}
.chat-list {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.chat-row {
  display: flex;
  align-items: flex-end;
  gap: 8px;
}
.chat-row.user { justify-content: flex-end; }
.avatar {
  width: 32px; height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 700;
  flex-shrink: 0;
}
.ai-av {
  background: linear-gradient(135deg, var(--blue), #4096ff);
  color: #fff;
}
.user-av {
  background: linear-gradient(135deg, var(--orange), #ffa940);
  color: #fff;
}
.bubble {
  max-width: 75%;
  padding: 10px 14px;
  border-radius: 16px;
  font-size: 12.5px;
  line-height: 1.5;
  background: #fff;
  color: var(--ink);
  box-shadow: var(--shadow-sm);
  border-bottom-left-radius: 5px;
}
.user-b {
  background: linear-gradient(135deg, var(--blue), #4096ff);
  color: #fff;
  border-bottom-left-radius: 16px;
  border-bottom-right-radius: 5px;
}
.screen-cta {
  display: flex;
  gap: 8px;
  margin-top: 14px;
}
.pill {
  flex: 1;
  padding: 9px 0;
  border: none;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  color: #fff;
}
.pill-blue { background: linear-gradient(135deg, var(--blue), #4096ff); }
.pill-orange { background: linear-gradient(135deg, var(--orange), #ffa940); }

/* Logo-style phone screen */
.phone-screen-logo {
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 46px 20px;
}
.screen-logo {
  height: 44px;
  margin: 0 auto 28px;
}
.screen-slogan {
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: 0.02em;
  background: linear-gradient(90deg, var(--blue), var(--orange));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* Float cards */
.float-card {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(10px);
  border-radius: 16px;
  box-shadow: var(--shadow-md);
  animation: float 4s ease-in-out infinite;
}
.card-1 {
  top: 70px;
  left: -20px;
  animation-delay: 0s;
}
.card-2 {
  bottom: 90px;
  right: -10px;
  animation-delay: 1.5s;
}
.fc-icon { font-size: 22px; }
.fc-title { font-size: 13px; font-weight: 700; color: var(--ink); }
.fc-desc { font-size: 11px; color: var(--muted); }

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

/* ========== Sections ========== */
.section { padding: 96px 0; position: relative; }
.section-alt { background: var(--bg-alt); }

.section-head { margin-bottom: 56px; }
.section-head.center { text-align: center; max-width: 680px; margin-left: auto; margin-right: auto; }
.tag {
  display: inline-block;
  padding: 6px 16px;
  background: var(--blue-50);
  color: var(--blue-600);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 18px;
}
.section-title {
  font-size: clamp(28px, 3.2vw, 42px);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin-bottom: 16px;
}
.section-desc {
  font-size: 17px;
  color: var(--muted);
  line-height: 1.7;
}

/* ========== Philosophy ========== */
.philosophy-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.phi-card {
  position: relative;
  padding: 40px 30px 36px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  transition: transform .3s var(--ease), box-shadow .3s var(--ease), border-color .3s;
  overflow: hidden;
}
.phi-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--blue), var(--orange));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .4s var(--ease);
}
.phi-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-md);
  border-color: transparent;
}
.phi-card:hover::before { transform: scaleX(1); }
.phi-num {
  font-size: 56px;
  font-weight: 900;
  color: transparent;
  -webkit-text-stroke: 2px var(--blue);
  opacity: .25;
  line-height: 1;
  margin-bottom: 16px;
}
.phi-icon {
  font-size: 40px;
  margin-bottom: 18px;
}
.phi-card h3 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 12px;
}
.phi-card p {
  color: var(--muted);
  font-size: 15px;
  line-height: 1.75;
}

/* ========== Features ========== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.feat-card {
  padding: 36px 30px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  transition: all .3s var(--ease);
}
.feat-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
}
.feat-card.feat-active {
  background: linear-gradient(160deg, #fff7e6 0%, #fff 100%);
  border-color: rgba(255,122,0,.25);
}
.feat-ico {
  width: 60px; height: 60px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  margin-bottom: 22px;
}
.feat-blue { background: var(--blue-50); }
.feat-orange { background: var(--orange-50); }
.feat-card h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
}
.feat-card > p {
  color: var(--muted);
  font-size: 15px;
  line-height: 1.7;
  margin-bottom: 20px;
}
.feat-list { display: flex; flex-direction: column; gap: 10px; }
.feat-list li {
  position: relative;
  padding-left: 22px;
  font-size: 14px;
  color: var(--ink-2);
}
.feat-list li::before {
  content: '';
  position: absolute;
  left: 0; top: 8px;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--blue), var(--orange));
}

/* ========== Pain Points ========== */
.pain-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.pain-card {
  position: relative;
  padding: 36px 30px;
  background: #fff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  overflow: hidden;
  transition: all .3s var(--ease);
}
.pain-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: rgba(255,122,0,.3);
}
.pain-num {
  position: absolute;
  top: 20px; right: 24px;
  font-size: 48px;
  font-weight: 900;
  color: transparent;
  -webkit-text-stroke: 1.5px var(--orange);
  opacity: .3;
  line-height: 1;
}
.pain-card h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
  padding-right: 60px;
}
.pain-card p {
  color: var(--muted);
  font-size: 15px;
  line-height: 1.75;
}

/* ========== Advantages ========== */
.adv-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.adv-card {
  display: flex;
  gap: 22px;
  padding: 32px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  transition: all .3s var(--ease);
}
.adv-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
}
.adv-ico {
  flex-shrink: 0;
  width: 54px; height: 54px;
  border-radius: 14px;
  background: var(--blue-50);
  color: var(--blue);
  display: flex;
  align-items: center;
  justify-content: center;
}
.adv-ico svg { width: 26px; height: 26px; }
.adv-ico.adv-orange {
  background: var(--orange-50);
  color: var(--orange);
}
.adv-card h3 {
  font-size: 19px;
  font-weight: 700;
  margin-bottom: 8px;
}
.adv-card p {
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.75;
}

/* ========== Industry ========== */
.industry-box {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 48px;
  padding: 56px;
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  border-radius: 32px;
  color: #fff;
  position: relative;
  overflow: hidden;
}
.industry-box::before {
  content: '';
  position: absolute;
  top: -100px; right: -100px;
  width: 320px; height: 320px;
  background: radial-gradient(circle, rgba(22,119,255,.35), transparent 70%);
  border-radius: 50%;
}
.industry-box::after {
  content: '';
  position: absolute;
  bottom: -120px; left: -80px;
  width: 300px; height: 300px;
  background: radial-gradient(circle, rgba(255,122,0,.3), transparent 70%);
  border-radius: 50%;
}
.industry-left { position: relative; z-index: 1; max-width: 480px; }
.industry-left .tag {
  background: rgba(22,119,255,.2);
  color: #69b1ff;
}
.industry-left .section-title { color: #fff; }
.industry-left .section-desc { color: rgba(255,255,255,.7); }
.industry-tags {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.industry-tags-center {
  margin: 0 auto;
  flex-direction: row;
  flex-wrap: wrap;
  justify-content: center;
}
.ind-tag {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 28px;
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 16px;
  font-size: 20px;
  font-weight: 700;
  backdrop-filter: blur(8px);
  transition: all .25s var(--ease);
}
.ind-tag:hover {
  background: rgba(255,255,255,.14);
  transform: translateX(6px);
}
.ind-emoji { font-size: 28px; }

/* ========== CTA ========== */
.cta-box {
  position: relative;
  text-align: center;
  padding: 72px 40px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 32px;
  overflow: hidden;
  box-shadow: var(--shadow-md);
}
.cta-glow {
  position: absolute;
  width: 300px; height: 300px;
  border-radius: 50%;
  filter: blur(80px);
  opacity: .35;
}
.cta-glow-blue {
  top: -100px; left: 10%;
  background: var(--blue);
}
.cta-glow-orange {
  bottom: -100px; right: 10%;
  background: var(--orange);
}
.cta-box h2 {
  position: relative;
  font-size: clamp(28px, 3.4vw, 42px);
  font-weight: 800;
  margin-bottom: 14px;
}
.cta-box p {
  position: relative;
  font-size: 17px;
  color: var(--muted);
  margin-bottom: 32px;
}
.cta-actions {
  position: relative;
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ========== Footer ========== */
.footer {
  background: #0f172a;
  color: rgba(255,255,255,.7);
  padding: 64px 0 32px;
}
.footer-inner { display: flex; flex-direction: column; gap: 40px; }
.footer-top {
  display: flex;
  justify-content: space-between;
  gap: 48px;
  flex-wrap: wrap;
}
.footer-brand { max-width: 320px; }
.footer-logo { height: 36px; margin-bottom: 16px; }
.footer-brand p { font-size: 14px; line-height: 1.7; color: rgba(255,255,255,.6); }
.footer-cols { display: flex; gap: 64px; }
.footer-col h4 {
  color: #fff;
  font-size: 15px;
  margin-bottom: 16px;
}
.footer-col a {
  display: block;
  font-size: 14px;
  color: rgba(255,255,255,.55);
  margin-bottom: 10px;
  transition: color .2s;
}
.footer-col a:hover { color: #69b1ff; }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 28px;
  border-top: 1px solid rgba(255,255,255,.1);
  font-size: 13px;
  color: rgba(255,255,255,.5);
}
.footer-icp { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.footer-icp a { color: rgba(255,255,255,.6); transition: color .2s; }
.footer-icp a:hover { color: #69b1ff; }
.footer-icp .sep { opacity: .4; }

/* ========== Reveal Animation ========== */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity .7s var(--ease), transform .7s var(--ease);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ========== Responsive ========== */
@media (max-width: 960px) {
  .hero-inner { grid-template-columns: 1fr; gap: 60px; text-align: center; }
  .hero-sub { margin-left: auto; margin-right: auto; }
  .hero-actions, .hero-meta { justify-content: center; }
  .philosophy-grid, .features-grid, .pain-grid { grid-template-columns: 1fr; max-width: 460px; margin: 0 auto; }
  .adv-grid { grid-template-columns: 1fr; }
  .industry-box { flex-direction: column; text-align: center; padding: 40px 28px; }
  .industry-left { max-width: 100%; }
  .industry-tags { width: 100%; }
  .ind-tag { justify-content: center; }
  .nav { display: none; }
  .nav-cta { display: none; }
  .nav-toggle { display: flex; }
  .nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 72px; left: 0; right: 0;
    background: #fff;
    padding: 20px 24px;
    gap: 18px;
    border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow-md);
  }
  .nav.open a { font-size: 16px; }
}

@media (max-width: 560px) {
  .hero { padding: 130px 0 70px; }
  .section { padding: 64px 0; }
  .footer-cols { gap: 36px; }
  .cta-box { padding: 48px 24px; }
  .phone { width: 260px; height: 520px; }
  .card-1 { left: 0; }
  .card-2 { right: 0; }
}