@keyframes prt-rise {
    from { opacity: 0; transform: translateY(28px); }
    to   { opacity: 1; transform: translateY(0); }
}

@keyframes prt-line-grow {
    from { transform: scaleX(0); }
    to   { transform: scaleX(1); }
}

@keyframes prt-float {
    0%, 100% { transform: translateY(0px); }
    50%       { transform: translateY(-6px); }
}

.frag-prt .prt-ri  { animation: prt-rise .7s cubic-bezier(.22,1,.36,1) both; }
.frag-prt .prt-d1  { animation-delay: .05s; }
.frag-prt .prt-d2  { animation-delay: .12s; }
.frag-prt .prt-d3  { animation-delay: .20s; }

.frag-prt { --sans: 'Plus Jakarta Sans', system-ui, sans-serif; }

.frag-prt a { text-decoration: none; color: inherit; }

.prt-hero {
    position: relative;
    padding: 80px 24px 68px;
    text-align: center;
    background: var(--ink);
    overflow: hidden;
}

.prt-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: repeating-linear-gradient(
        -45deg,
        transparent,
        transparent 28px,
        rgba(255,255,255,.025) 28px,
        rgba(255,255,255,.025) 29px
    );
    pointer-events: none;
}

.prt-hero::after {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 50% 60% at 20% 50%, rgba(var(--blue-rgb),.22) 0%, transparent 70%),
        radial-gradient(ellipse 50% 60% at 80% 50%, rgba(124,58,237,.18) 0%, transparent 70%);
    pointer-events: none;
}

.prt-hero-inner {
    position: relative;
    z-index: 2;
    max-width: 700px;
    margin: 0 auto;
}

.prt-hero h1 {
    font-size: 40px;
    font-weight: 800;
    color: var(--white);
    letter-spacing: -1.5px;
    line-height: 1.15;
    margin: 0 0 20px;
}

.prt-hero h1 em { font-style: normal; }

.prt-hero-meta {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 8px;
}

.prt-hero-meta span {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border-radius: 20px;
    background: rgba(255,255,255,.06);
    border: 1px solid rgba(255,255,255,.1);
    font-size: 13px;
    font-weight: 700;
    color: rgba(255,255,255,.7);
}

.prt-hero-meta i { color: var(--blue-xl); font-size: 13px; font-weight: 700; }

.prt-nav-strip {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255,255,255,.9);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--mist);
    padding: 0 24px;
}

.prt-nav-strip-in {
    max-width: 860px;
    margin: 0 auto;
    display: flex;
    gap: 4px;
    overflow-x: auto;
    scrollbar-width: none;
    padding: 10px 0;
}

.prt-nav-strip-in::-webkit-scrollbar { display: none; }

.prt-nav-pill:hover,
.prt-nav-pill.active { background: var(--blue-l); color: var(--blue); }

.prt-nav-pill i { font-size: 13px; font-weight: 700; }

.prt-layout {
    max-width: 860px;
    margin: 0 auto;
    padding: 48px 24px;
}

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

.prt-section {
    margin-bottom: 52px;
    scroll-margin-top: 72px;
}

.prt-sec-head {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 20px;
    padding-bottom: 16px;
    position: relative;
}

.prt-sec-head::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--mist);
    border-radius: 2px;
}

.prt-section:hover .prt-sec-head::after {
    background: linear-gradient(90deg, var(--blue), var(--purple));
    animation: prt-line-grow .4s cubic-bezier(.22,1,.36,1) both;
    transform-origin: left;
}

.prt-sec-num {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    background: var(--ink);
    color: var(--white);
    font-size: 13px;
    font-weight: 800;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.prt-sec-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--ink);
    letter-spacing: -.4px;
    margin: 0;
}

.prt-body {
    font-size: 16px;
    font-weight: 400;
    color: var(--slate);
    line-height: 1.8;
    margin-bottom: 20px;
}

.prt-models-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-bottom: 24px;
}

.prt-model-card {
    position: relative;
    display: flex;
    flex-direction: column;
    padding: 28px 22px 24px;
    border-radius: var(--r-xl);
    background: var(--snow);
    border: 2px solid var(--mist);
    overflow: hidden;
    text-decoration: none;
    color: inherit;
    transition: .28s cubic-bezier(.22,1,.36,1);
    cursor: pointer;
}

.prt-model-card::before {
    content: '';
    position: absolute;
    top: 0; right: 0;
    width: 100px; height: 100px;
    border-radius: 0 20px 0 100%;
    opacity: .5;
    transition: .3s;
}

.prt-model-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 20px 48px rgba(0,0,0,.1);
}

.prt-model-card:hover::before { opacity: 1; }

.prt-model-card--green  { background: var(--white); border-color: var(--green-xl); }
.prt-model-card--purple { background: var(--white); border-color: var(--purple-xl); }

.prt-model-card--green::before  { background: var(--green-xl); }
.prt-model-card--purple::before { background: var(--purple-l); }

.prt-model-icon {
    width: 48px;
    height: 48px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    margin-bottom: 14px;
    position: relative;
    z-index: 1;
    transition: .25s;
}

.prt-model-card:hover .prt-model-icon { transform: scale(1.1); }

.prt-model-card--green  .prt-model-icon { background: var(--green-l);  color: var(--green); }
.prt-model-card--purple .prt-model-icon { background: var(--purple-l); color: var(--purple); }

.prt-model-num {
    font-size: 13px;
    font-weight: 700;
    letter-spacing: .2em;
    text-transform: uppercase;
    color: var(--silver);
    margin-bottom: 6px;
    position: relative;
    z-index: 1;
}

.prt-model-title {
    font-size: 19px;
    font-weight: 800;
    color: var(--ink);
    letter-spacing: -.4px;
    margin: 0 0 8px;
    position: relative;
    z-index: 1;
}

.prt-model-type {
    font-size: 13px;
    font-weight: 700;
    color: var(--slate);
    text-transform: uppercase;
    letter-spacing: .08em;
    margin-bottom: 8px;
    position: relative;
    z-index: 1;
}

.prt-model-sub {
    font-size: 16px;
    font-weight: 400;
    color: var(--slate);
    line-height: 1.65;
    margin: 0 0 18px;
    flex: 1;
    position: relative;
    z-index: 1;
}

.prt-model-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    font-weight: 700;
    position: relative;
    z-index: 1;
    transition: gap .2s;
}

.prt-model-card--green  .prt-model-link { color: var(--green); }
.prt-model-card--purple .prt-model-link { color: var(--purple); }

.prt-model-card:hover .prt-model-link { gap: 10px; }

.prt-list {
    list-style: none;
    padding: 0;
    margin: 0 0 20px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.prt-list li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 14px 16px;
    background: var(--snow);
    border: 2px solid var(--mist);
    border-radius: var(--r-xl);
    font-size: 15px;
    font-weight: 600;
    color: var(--ink2);
    line-height: 1.6;
    transition: .18s;
}

.prt-list li:hover {
    border-color: var(--blue-xl);
    background: var(--blue-l);
}

.prt-list li::before {
    content: '';
    width: 20px;
    height: 20px;
    border-radius: 6px;
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='%232563eb'%3E%3Cpath fill-rule='evenodd' d='M16.707 5.293a1 1 0 010 1.414l-8 8a1 1 0 01-1.414 0l-4-4a1 1 0 011.414-1.414L8 12.586l7.293-7.293a1 1 0 011.414 0z' clip-rule='evenodd'/%3E%3C/svg%3E") center/14px no-repeat;
    background-color: var(--blue-l);
    flex-shrink: 0;
    margin-top: 1px;
}

.prt-callout--blue   { background: var(--blue-l);   border-color: var(--blue-xl); }
.prt-callout--green  { background: var(--green-l);  border-color: var(--green-xl); }

.prt-callout--purple { background: var(--purple-l); border-color: var(--purple-xl); }

.prt-callout-icon {
    width: 38px;
    height: 38px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 700;
    flex-shrink: 0;
}

.prt-callout--blue   .prt-callout-icon { background: var(--blue-xl); color: var(--blue); }
.prt-callout--green  .prt-callout-icon { background: var(--green-xl); color: var(--green); }

.prt-callout--purple .prt-callout-icon { background: var(--purple-l); color: var(--purple); }

.prt-callout-title { font-size: 13px; font-weight: 800; margin: 0 0 4px; }

.prt-callout--blue   .prt-callout-title { color: var(--blue-d); }
.prt-callout--green  .prt-callout-title { color: var(--green-d); }

.prt-callout--purple .prt-callout-title { color: var(--purple-d); }

.prt-callout-text {
    font-size: 16px;
    font-weight: 400;
    color: var(--slate);
    margin: 0;
    line-height: 1.65;
}

.prt-fit-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
    margin-bottom: 20px;
}

.prt-fit-card {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    padding: 20px;
    background: var(--snow);
    border: 2px solid var(--mist);
    border-radius: var(--r-xl);
    transition: .22s;
}

.prt-fit-card:hover {
    border-color: var(--blue);
    box-shadow: 0 4px 20px rgba(var(--blue-rgb),.08);
    transform: translateY(-2px);
}

.prt-fit-icon {
    width: 40px;
    height: 40px;
    border-radius: 12px;
    background: var(--snow);
    border: 1px solid var(--mist);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 700;
    color: var(--slate);
    flex-shrink: 0;
    transition: .22s;
}

.prt-fit-card:hover .prt-fit-icon {
    background: var(--blue);
    color: var(--white);
    border-color: var(--blue);
}

.prt-fit-card p {
    font-size: 16px;
    font-weight: 400;
    color: var(--ink2);
    line-height: 1.65;
    margin: 0;
}

@media (max-width: 900px) {
    .prt-layout      { padding: 32px 16px; }
    .prt-models-grid { grid-template-columns: 1fr; }
    .prt-fit-grid    { grid-template-columns: 1fr; }
}

@media (max-width: 600px) {
    .prt-hero        { padding: 56px 20px 48px; }
    .prt-models-grid { gap: 12px; }
}