/* ============================================================
   SMART LOCKING PAGE — 智能锁付
   namespace: .sl-*
   reuses .sa-hero / .sa-head from smart-applying.css
   and .ai-flow / .ai-chain / .ai-adv from appearance-inspection.css
   ============================================================ */

/* ---------- SECTION titles — match the leaner hero treatment, ---------- */
/* but kept a step lighter & smaller so they never out-weigh the banner. */
.sl-pains .sa-title,
.sl-system .sa-title,
.ai-chain .sa-title,
.sl-coop .sa-title,
.sl-value .sa-title {
  font-family: "HarmonyOS Sans SC", "MiSans", "Noto Sans SC",
               "PingFang SC", var(--font-cn);
  font-weight: 500;
  letter-spacing: 0.04em;
  font-size: clamp(28px, 3vw, 44px);
}

/* ---------- HERO image framing — full-bleed cover (no gaps / no seam), ---------- */
/* biased low-right to keep the robot + locking gun-head in frame           */
.sl-hero .sa-hero-bg img {
  object-position: 50% 78%;
  transform: scale(1.2) translateX(4%);
  transform-origin: 0% 100%;
}

/* ---------- HERO title — leaner, more modern / tech feel ---------- */
/* Swap the heavy rounded default for a sharper sans stack, drop the
   weight and open up tracking so the 主标题 reads light and crisp
   instead of pressed-down heavy. */
.sl-hero h1 {
  font-family: "HarmonyOS Sans SC", "MiSans", "Noto Sans SC",
               "PingFang SC", var(--font-cn);
  font-size: clamp(38px, 5vw, 64px);
  font-weight: 500;
  letter-spacing: 0.06em;
  line-height: 1.14;
}
/* second half a notch heavier to keep a clean read-order without
   reintroducing the old block-heavy look */
.sl-hero h1 .accent {
  font-weight: 600;
  letter-spacing: 0.05em;
}
/* stronger left wash so title reads cleanly over the busy cage mesh.
   Applied on the real .sa-hero-tint DIV (not a pseudo-element) so it
   renders faithfully across browsers and capture tools. */
.sl-hero .sa-hero-tint {
  display: block;
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(
    90deg,
    rgba(251, 251, 250, 1) 0%,
    rgba(251, 251, 250, 1) 30%,
    rgba(251, 251, 250, 0.92) 45%,
    rgba(251, 251, 250, 0.62) 60%,
    rgba(251, 251, 250, 0.22) 74%,
    rgba(251, 251, 250, 0) 86%
  );
  pointer-events: none;
}
.sl-hero .sa-lede {
  white-space: normal;
  max-width: 620px;
}

/* ============================================================
   DARK HERO — top title / clear middle / bottom chips
   middle band fully clear (no scrim), only top+bottom edges dim
   ============================================================ */
.sl-hero--dark {
  position: relative;
  background: #0E1A1F;
  color: #fff;
  overflow: hidden;
  min-height: 0;
  display: block;
  padding: 0;
  border-bottom: none;
}
.sl-banner-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.sl-banner-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 35%;
}
/* only the top edge (behind title) and bottom edge (behind chips)
   are darkened — the wide middle band stays fully clear */
.sl-banner-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom,
    rgba(14,26,31,0.95) 0%,
    rgba(14,26,31,0.78) 8%,
    rgba(14,26,31,0.45) 16%,
    rgba(14,26,31,0.12) 24%,
    rgba(14,26,31,0) 32%,
    rgba(14,26,31,0) 68%,
    rgba(14,26,31,0.30) 82%,
    rgba(14,26,31,0.70) 92%,
    rgba(14,26,31,0.95) 100%);
}
.sl-banner-grid {
  position: absolute;
  inset: 0;
  z-index: 1;
  background-image:
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 70px 70px;
  pointer-events: none;
  -webkit-mask-image: linear-gradient(180deg, #000 0%, transparent 22%);
  mask-image: linear-gradient(180deg, #000 0%, transparent 22%);
}
.sl-banner-inner {
  position: relative;
  z-index: 2;
  min-height: 660px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.sl-banner-top {
  padding-top: 78px;
  max-width: 760px;
}
.sl-banner-tag {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 16px;
  background: rgba(31,188,156,0.12);
  border: 1px solid rgba(31,188,156,0.3);
  border-radius: 100px;
  font-family: var(--font-en);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--green);
  margin-bottom: 34px;
}
.sl-banner-top h1 {
  font-size: clamp(36px, 4.8vw, 60px);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
  color: #fff;
  text-shadow: 0 2px 30px rgba(0,0,0,0.55);
}
.sl-banner-sub {
  font-size: 16px;
  color: rgba(255,255,255,0.9);
  line-height: 1.65;
  max-width: 620px;
  text-shadow: 0 1px 14px rgba(0,0,0,0.75);
}
.sl-banner-mid {
  flex: 1;
  min-height: 180px;
}
.sl-banner-bottom {
  padding-bottom: 48px;
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}
.sl-cap-chip {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 22px;
  background: rgba(14,26,31,0.55);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,0.14);
  border-radius: 100px;
  font-size: 14.5px;
  font-weight: 500;
  color: #fff;
  transition: all 0.3s cubic-bezier(0.22,1,0.36,1);
}
.sl-cap-chip:hover {
  background: rgba(31,188,156,0.92);
  border-color: var(--green);
  transform: translateY(-3px);
}
.sl-cap-chip svg {
  width: 18px;
  height: 18px;
  stroke: var(--green);
  stroke-width: 2;
  fill: none;
  flex-shrink: 0;
  transition: stroke 0.3s;
}
.sl-cap-chip:hover svg { stroke: #fff; }
@media (max-width: 768px) {
  .sl-banner-inner { min-height: 560px; }
  .sl-banner-top { padding-top: 60px; }
  .sl-banner-sub { font-size: 15px; }
  .sl-banner-bg img { object-position: center 38%; }
  .sl-banner-bottom { padding-bottom: 36px; gap: 10px; }
  .sl-cap-chip { padding: 11px 16px; font-size: 13px; }
}

/* ============================================================
   01b · 行业痛点 — 3-col variant of .sa-pains
   ============================================================ */
.sl-pains .sa-pain-grid {
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
}
.sl-pains .sa-pain {
  background: transparent;
  border: 0;
  border-left: 1px solid var(--line);
  border-radius: 0;
  padding: 6px 46px;
}
.sl-pains .sa-pain:first-child { border-left: 0; padding-left: 0; }
.sl-pains .sa-pain:last-child { padding-right: 0; }
.sl-pains .sa-pain:hover {
  transform: none;
  box-shadow: none;
  border-color: var(--line);
}
.sl-pains .sa-pain-no {
  display: flex;
  align-items: baseline;
  gap: 9px;
  margin-bottom: 18px;
}
.sl-pains .sa-pain-no .n {
  font-family: var(--font-en);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--green-600);
}
.sl-pains .sa-pain-no .sep {
  font-family: var(--font-en);
  font-size: 15px;
  color: rgba(15, 40, 30, 0.22);
}
.sl-pains .sa-pain-no .lab {
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--muted);
}
.sl-pains .sa-pain h3 {
  font-size: 22px;
  margin: 0 0 12px;
}
@media (max-width: 880px) {
  .sl-pains .sa-pain-grid { grid-template-columns: 1fr; gap: 0; }
  .sl-pains .sa-pain {
    border-left: 0;
    border-top: 1px solid var(--line);
    padding: 28px 0;
  }
  .sl-pains .sa-pain:first-child { border-top: 0; padding-top: 0; }
}

/* ============================================================
   2 · 系统构成 — 视觉 / 执行 / 供料 / 控制 四单元
   ============================================================ */
.sl-system {
  background: #fff;
  padding: clamp(80px, 9vw, 130px) 0;
}

.sl-unit-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.sl-unit {
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-areas:
    "ic  en"
    "ic  title"
    "desc desc";
  align-items: start;
  column-gap: 15px;
  padding: 26px 26px 24px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #fff;
  transition: border-color 0.25s, box-shadow 0.25s, transform 0.25s;
}
.sl-unit:hover {
  border-color: rgba(30, 160, 151, 0.4);
  box-shadow: 0 16px 36px -16px rgba(15, 40, 30, 0.16);
  transform: translateY(-3px);
}
.sl-unit-ic {
  grid-area: ic;
  align-self: center;
  width: 46px;
  height: 46px;
  border-radius: 13px;
  display: grid;
  place-items: center;
  background: rgba(30, 160, 151, 0.10);
  color: var(--green-600);
  margin: 0;
}
.sl-unit:nth-child(2) .sl-unit-ic,
.sl-unit:nth-child(4) .sl-unit-ic {
  background: rgba(22, 80, 168, 0.10);
  color: var(--blue);
}
.sl-unit-en {
  grid-area: en;
  align-self: end;
  font-family: var(--font-en);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 3px;
}
.sl-unit h3 {
  grid-area: title;
  align-self: start;
  font-size: 19px;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -0.005em;
  margin: 0;
  padding: 0;
  border: 0;
}
.sl-unit p {
  grid-area: desc;
  font-size: 14.5px;
  color: var(--muted);
  line-height: 1.7;
  margin: 16px 0 0;
}
@media (max-width: 980px) {
  .sl-unit-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 540px) {
  .sl-unit-grid { grid-template-columns: 1fr; }
}

/* ---- deployment render row — aligns to the 4-unit grid (edges + center) ---- */
.sl-deploy {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-top: 20px;
}
.sl-shot {
  position: relative;
  margin: 0;
  aspect-ratio: 572 / 360;
  border-radius: 18px;
  overflow: hidden;
  border: 1px solid var(--line);
  background: #0E1A14;
  box-shadow: 0 1px 0 rgba(15, 40, 30, 0.02);
  transition: border-color 0.3s, box-shadow 0.3s, transform 0.3s;
}
.sl-shot:hover {
  border-color: rgba(30, 160, 151, 0.4);
  box-shadow: 0 22px 46px -20px rgba(15, 40, 30, 0.28);
  transform: translateY(-3px);
}
.sl-shot img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.5s cubic-bezier(0.22, 1, 0.36, 1);
}
.sl-shot:hover img { transform: scale(1.035); }
.sl-shot-cap {
  position: absolute;
  inset: auto 0 0 0;
  display: flex;
  flex-direction: column;
  gap: 7px;
  padding: 44px 24px 20px;
  background: linear-gradient(180deg, rgba(14, 26, 20, 0) 0%, rgba(14, 26, 20, 0.78) 70%, rgba(14, 26, 20, 0.9) 100%);
}
.sl-shot-tag {
  font-family: var(--font-en);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: #34C9BD;
}
.sl-shot-t {
  font-size: 16px;
  font-weight: 500;
  letter-spacing: 0.01em;
  color: #fff;
}
@media (max-width: 760px) {
  .sl-deploy { grid-template-columns: 1fr; }
}

/* ============================================================
   3 · 四步闭环 — loop bar (reuses .ai-chain / .ai-flow / .ai-node)
   ============================================================ */
.sl-loop {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
  max-width: 1120px;
  margin: 36px auto 0;
  padding: 18px 28px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(30, 160, 151, 0.08), rgba(22, 80, 168, 0.08));
  border: 1px solid rgba(22, 80, 168, 0.16);
}
.sl-loop .sl-loop-ic {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  background: rgba(30, 160, 151, 0.14);
  color: var(--green-600);
  flex-shrink: 0;
}
.sl-loop .sl-loop-txt {
  font-size: 14.5px;
  color: var(--ink-2);
  letter-spacing: 0.01em;
}
.sl-loop .sl-loop-txt b { color: var(--green-600); }

/* ============================================================
   4 · 协同保障 — 2×2 large feature cards
   ============================================================ */
.sl-coop {
  background: #fff;
  padding: clamp(80px, 9vw, 130px) 0;
}

.sl-coop-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
}
.sl-coop-card {
  position: relative;
  display: flex;
  gap: 24px;
  padding: 34px 36px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: #fff;
  overflow: hidden;
  transition: border-color 0.25s, box-shadow 0.25s, transform 0.25s;
}
.sl-coop-card:hover {
  border-color: rgba(30, 160, 151, 0.4);
  box-shadow: 0 18px 40px -18px rgba(15, 40, 30, 0.18);
  transform: translateY(-3px);
}
.sl-coop-ic {
  width: 56px;
  height: 56px;
  border-radius: 15px;
  display: grid;
  place-items: center;
  background: #0E1A14;
  color: #34C9BD;
  flex-shrink: 0;
}
.sl-coop-body { min-width: 0; }
.sl-coop-no {
  font-family: var(--font-en);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--green-600);
  margin-bottom: 9px;
}
.sl-coop-card h3 {
  font-size: 21px;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -0.005em;
  margin: 0 0 11px;
}
.sl-coop-card p {
  font-size: 14.5px;
  color: var(--muted);
  line-height: 1.72;
  margin: 0;
}
@media (max-width: 860px) {
  .sl-coop-grid { grid-template-columns: 1fr; }
}
@media (max-width: 460px) {
  .sl-coop-card { flex-direction: column; gap: 18px; padding: 28px; }
}

/* ============================================================
   5 · 价值统一 — 4-col icon feature cards
   ============================================================ */
.sl-value {
  background: #FBFBF8;
  padding: clamp(80px, 9vw, 130px) 0;
  border-top: 1px solid var(--line);
}

/* ---- 1 feature + 3 list split (light, elevated feature) ---- */
.sl-value-split {
  display: grid;
  grid-template-columns: 1.04fr 0.96fr;
  gap: 26px;
  align-items: stretch;
}
.sl-value-feature {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 46px 44px;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: #fff;
}
.sl-vf-eyebrow {
  font-family: var(--font-en);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--green-600);
  margin-bottom: 26px;
}
.sl-value-feature h3 {
  font-size: clamp(28px, 3vw, 38px);
  font-weight: 700;
  line-height: 1.22;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin: 0;
}
.sl-value-feature p {
  position: relative;
  margin: auto 0 0;
  padding-top: 90px;
  max-width: 44ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--muted);
}
.sl-value-list {
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.sl-value-card {
  display: grid;
  grid-template-columns: 46px 1fr;
  column-gap: 18px;
  align-items: start;
  padding: 26px 28px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #fff;
  transition: border-color 0.25s, box-shadow 0.25s, transform 0.25s;
}
.sl-value-card:hover {
  border-color: rgba(30, 160, 151, 0.4);
  box-shadow: 0 16px 34px -18px rgba(15, 40, 30, 0.16);
  transform: translateY(-2px);
}
.sl-value-ic {
  width: 46px;
  height: 46px;
  border-radius: 13px;
  display: grid;
  place-items: center;
  background: rgba(30, 160, 151, 0.10);
  color: var(--green-600);
}
.sl-value-tx { min-width: 0; }
.sl-value-card h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  margin: 3px 0 7px;
}
.sl-value-card p {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.68;
  margin: 0;
}
@media (max-width: 860px) {
  .sl-value-split { grid-template-columns: 1fr; }
}